Ralph Waldo Emerson Essay Example for Free

Ralph Waldo Emerson EssayTranscendentalism is the power to be an idiosyncratic. Thoreau once said Most of the luxuries and many a nonher(prenominal) of the so-called comforts of life are not only not indispensable, but positive hindrances to the elevation of mankind. In this he meant that the individual didnt deprivation superfluities in order to happy or be ones true self. In todays baseball club, this philosophy is not evident. When looking to the population around him, the individual constantly has things thrust at him telling him what he has to believe in to be liked, and what he has to look like to be accepted, and what he needs to be happy. What the individual truly needs is the faculty to be an individual, the ability to be transcendental. Transcendentalism should be applied to aspects of everyday life. The ability to be separatist is a driving force in the world. Self-empowerment of the individual is critical in todays society. Society everywhere is in conclave a gainst the manhood of every one of its members. (Emerson). Society conspires to make one like the masses and takes away ones ability to be independent. An individual should not give into things like media to tell them how to live and live life on his declare terms.Ones belief in self allows the empowerment of the individual. peach what you think in hard words and tomorrow speak what tomorrow thinks in hard words again, though it contradict everything you day today. (Emerson). If one thinks something he should believe in it even if he believes in something different tomorrow. When one is an individual, he does not have to explain himself to society. The individual moldiness be independent in order to be transcendental. Whoso would be a man must be a nonconformist. (Emerson). Society tells individuals who to be, but in order to be individuals they must not give in to societal pressures.They must be unique and have their quirks. Humanity must twist a society of individuals to pro gress anterior toward a brighter future. Society inhibits mans ability to be independent. Society puts man at the mercy of other men. Society is a joint-stock company in which every one if its members agree for the better of securing of his bread to each shareholder to surrender the liberty and culture of the eater. (Emerson) One should not allow others to let his need be at the mercy of others. If one does so, he loses his individual freedom. Society should solely be a mechanism for man. But loMen have become tools of their tools (Thoreau). Society has transformed from being a mere apparatus of the individual to something that the individual needs. One need not be rich in order to be happy. Superfluous wealth can but superfluities only. Money is not required to buy one necessary of the soul (Thoreau). The individual is told by society that in order to be happy one must have these luxuries, but truly all one needs is simplicity. Individuals must not cave into society and instead create their own standards to live by. Transcendentalism should be utilized in all aspects of life.Humanity should follow the path of its own creation. if one advances confidently on the direction of his dreams, and endeavors to live the life which he has imagined will meet with a success unexpected in common hours. (Thoreau). If the individual follows his own path, he will be successful and be able to find success even when surrounded by a sea of gray. luck opposes no one. The setting sun is reflected from the windows of the almshouse as brightly as from the rich mans adobe the snow melts before its door as archeozoic in the spring. (Thoreau). The opportunities of the world come equal for all despite superfluities or situation, so the individual should accept his life and progress from there. Man should look innermost for his peace of mind. Yet it is certain that the power to produce this delight does not reside in personality, but in man, or in a unison of both. (Emerson). To happy one cannot solely depend on the world around him. The individual must also depend on himself. Equilibrium between nature and man must be found to transform our way of life and look towards a brighter future.If society were to remain as it is now, the future for gentleman looks grave. Unless humanity does something to alter its future, society will end up similar to the one in Fahrenheit 451. Humanity will ultimately become a society of ignorance and dependence. To combat this, man must take these transcendentalist theories and apply its aspects to everyday life. If every man and woman did this and pasted it on to their children, society could be transformed into something first-class and beneficial for both the current generation and the generations to come.

The Blanket story Essay Example for Free

The Blanket story EssayThe Blanket is a story about two lovers who enjoys wild sex, but is uncertain if they argon willing to spend the rest of their lives together. The relationship they share is that which is built nothing more but lust. In the end, the couple figured out their feelings for each other, the masking of Valerie serves as symbolism of their union. I have to say that this story surprised me the title did not foreshadow the erotic nature of its plot, or rather the dilate descriptions of the author. The story has a lot of auras that are very poetic, usually with a theme of one lover comforting the other.Of all these poetic drags, one occupancy stands out for me. He imagined scooping up sleeping Valerie and putting her in the middle of his thoughts. In choosing a line from a story, I always look for the line that pretty much sums up the whole story. If that is not possible, I choose the lines which have the most appeal to me. The other factors that I look for are the lines aesthetic value, if the line is nice to read, use of sound devices. Next is the lines symbolic meaning, almost all creative forms of literature has slightly sort of symbolic meaning that means more than it actually appears.Another is the lines use of images, how the lines make my imagination work. How the line summarizes the story This line does not on the button sum up the entire story, in fact its just half of it. It does not show the rough sexual relations that happened to Valerie and Michael and the conflict that resulted from it. It just shows how Michael felt about Valerie despite their weird relationship. I also chose this line because, as corny as it sounds, its a romantic line usually base on stories with less sexual content. Aesthetic ValueIt may not mean much, but how the words used sounds to illustrate a scene in the story. Techniques like alliteration and rhyme are usually what I am looking for. The author may have not intended for that value to inhabit (they are usually attributed to poems) but it did any(prenominal)way. Scooping and sleeping are not only alliterated words but also rhyming words, putting in addition, rhymes as well. emblematical Meaning This line might mean that Michael would save (scoop) the sleeping Valerie in keep her in a place (inside his thoughts) away from the things that can harm her.Valerie told stories of her appalling past, how she got raped and beat up. It is one of the reasons why she cried during one of their intimate moments. She cried because she was reminded of this dark past. She felt vulnerable, especially after the bad joke that Michael put on her. by and by that event, Michael realized what he has done, and felt it was time that their relationship turn serious. Imagery Lines that have clear images of action are always effective they make the lectors imagination work.The image of a Valerie being scooped up by Michael in her sleep makes me think of a fantasy inspired music video, a damsel in distress being saved by a hero. Or a man just dreaming of her girl in her sleep, and being contented by just that mere sight. Conclusion He imagined scooping up sleeping Valerie and putting her in the middle of his thoughts. Seriously, you cant find any other line in the story that can match this lines aesthetic, visual, and symbolic meaning. The line is like taken straight out of a Nicholas Sparks novel.

Post Fordism System

Post Fordism SystemPost Fordism is an industrial model that replace Fordism model in 1970. It is a mathematical return model which is closely associated with socioeconomic clay used in most industrialized countries. Unlike Fordism which was used by Henry Fords plant where builders worked in a payoff line with each person performing specialized task in a repetitive manner, Post-Fordism is characterized by the use of new communicateation technology with the coming of the globalize financial market. From this model, I train learned that turnout should be tailored to the needs of the customers and should be driven by market demand. This fashion that labor has to be managed according to the employment process utilizing the current technology in the market. I give birth also learned that the production process should be more aimed at the consumers and their demands.Flexible formation is an approach which believes that production should not be aimed at the mass but it should b e flexible enough in rank to target a authorized group of consumers. Firms no longer need to invest so much of their money in creating production lines for mass production but they sound kinda embrace the modern technology which requires them to use intelligent labor and machine schemas in order to respond to the market needs quickly. One example of such flexible pull inup or flexible specialization is just-in-time manufacturing. This imagination of just in time production embraces producing what the consumers want and when it is needed taking into consideration the measure that is needed. This reckons that there is not overproduction of goods and there is minimal wastage of resources. Just in time production has been described as a pull system of production in which the actual order signals the real product to be manufacturers. This is a demand pull which enables an organization to produce only what the market requires and in the discipline quantity and at the needed time . This is a concept to minimize the cost of house w ar since the levels of raw material, component the labor and end product are kept to the minimum. It means only the needed labor will be kept in the organization.The concept also requires that use of horizontal chains of authority. This means that unlike in the earlier model where authority came from the top, post-Fordism ensures that authority in the way of labor in an organization flows in a horizontal manner. It gives more authority to the line managers to beat decisiveness without relying on the decision from the top management. One of the concepts that support horizontal chains of authority is the concept of decentralized decision making. This means that there is more decision making power that is delegated to the junior and middle staff in an organization. It helps line supervisors and manager and even the individual employees to represent their own decision and not wait for decision to come from above. Decentralize to dec ision making allows the labor force to have more space to restrain their own decision concerning their work. (Womack 2003, p. 45)Having a creative labor is advantageous to the organization. It helps the organization to create a competitive advantage in the market. To manage creative labor, the concept of post-Fordism applies in that the labor force must be addicted space and time to be innovative. This will help them to tally the decision that they have to make in their work which increases their production.Basic critiques on post-Fordism argue on its structuralism, functionalism and evolutionism. Structuralism view change in terms of tensions, contradictions and dysfunction of structures not as a result of voluntary action of social agents. Functionalism continue despite opening of alternatives and faced with structures actors must make a choice. It has also been cricticised on the idea of selecting a single central factor as the impetus for change.From the topic I have learned that labor should be managed in order to be in line with the production needs of the organization which is dictated by the needs for the market. From what I have from the concept of post-Fordism it will help me in my future management practice since I have knowledge of labor management following the characteristics of post-Fordism. This will help me to manage labor specialization and feminism in the work place. It will help me manage labor to match the production needs of the customers.Enron the smartest guys in the roomThe above phrases come from a depiction that was screened describing the analyse of the collapse of Enron Corporation. This resulted in criminal trails involving several top executive of the company. The bring describes how the Enron trades were involved in the California Electricity crisis. This film gives an insight into the corporate cultures and the inherent line that comes with its. It describes some mechanism which motivate a vast immoral and profit orient ed corporate culture. It describes how the organization misused the employees in a bid to make higher profits. It also tried to describe how an individual can take an order before they question the reason why they are taking the order. It is a general review of how companies use immoral means to make high profitsForm the case, we can relate the idea of organization multifactoriality in how and organization is make of different people and of diverse characters. The film illustrated how Enron was made up of different people of different character and in the whole visualized a picture of the complexity of the organization both in the making and in its operation. From the above I learned how the organization functions as a complex entry that needs a clear leadership in order to harmonize all the characteristics to function as one. The complexity in the operation of the organization comes out in the strategy that the company uses to hike price only to return electricity later in order to make more profit. moreover this movie has been crictsized on the ground that while it gave so much on what can happen on peoples lives which were ruined by Enron, it did not give them a real human face.It also illustrates the concept of how an organization functions as a system. In this film, the management creates an unhealthy competition that crates animosity on the workers. They start salty in an unhealthy competition in a bid to outperform the other. This is because employees doing worst in an area were to be fired. The concept of organization as system means that the organization functions together as a system made of different interdependence parts. This means the management and the workers must work together to come upon the goals of the organization. But in this case the management uses the workers in order to make more profit. From this I have learned that the management should create a sociable working condition with the employees rather than creating competition be tween them.From this example we can see how the organization uses a fraud means in order to make more profit. Enron shifts power in order to create power shortage and raise price and later bring back power in order to reap the high profits. This happens in the full view of the managers. I have learnt that as a manager I am given the sole responsibleness of deciding for the organization and I should use my power to prevent an organization from committing such fraud. I have learned that it is fraudulent to use the employees in ode chemical decom perplex reaction make higher profit rather than protecting them.Once the Manager in the Enron knew that it was collapsing they started selling their shares and encourages the employees to retain theirs. In the movie there is the milligram test that is performed in order to understand how a worker can take order from a person without questioning such an order. A person is given an order to raise the voltage and push the button until he stops pushing the button on a moral ground. This showed a factor of leadership. This look into was meant to show that there is a high probability that the one who is given an order to carry out questions it. From this I have learned that as a manager I should provide real leadership to those under me and not just issue order. Every one has the right to question why they have been told to carry out that order. In the future I will be able to provide real leaderships to the workers and explain to them the orders that I issue and at the like time allow them to enquire about the orders. Production chains and coffee bean industry Black GoldBlack Gold was a documentary that was made as a film depicting the struggle African sodbusters in Ethiopians undergoes despite producing one of the most important primary commodity in the world. This film was made to illustrate how the western consumers fails to get in reality with the plight of those African farmers who toil day in day out to produce co ffee for them. It also features the World Trade Organization which was just an illustration of how production chains exploit the farmers in Ethiopia who are faced with famine. This documentary showed how the complexity of the production chain continues to hamper the prosperity of business. It gives an idea of how reducing the production chain can benefit the primary producer like the farmer in Ethiopian Highland. However the documentary has been crictsized on the ground that while it highlighted the plight of the Ethiopian Coffee farmers, it did not give any solution on what can be done to improve the distribution chain.One of the most important highlight of this documentary is the need to reduce production chains. It shows how the chain from producer, middlemen exporter, importer, roaster, retailers and consumers pushes the price of the end product and at the same time reduces the price of the primary producer. Although we can accept the idea of chain production, a lengthy chain le ads to ontogeny. From this documentary I have learned that the longer the production chain, the higher the operation cost and the higher the price of the end product. Hence in my future management, I will be striving to shorten the production chain in order to make effectful use of the labor and reduce the production cost.This documentary also brings an important sentiment of business ethics. Business ethics is an integral part of any business operation. It is the moral values that form the backbone of operation of any business. Business grave of ethics is an important tool that should guide any strategy that is taken by management. In this documentary, it was clearly evident how the middlemen continue to exploit the Ethiopian farmer and how the western consumer rushes to give food aid to the Ethiopian farmer who is faced with hunger without taking into consideration how much they take from that farmer. I have learnt that as a manager we should conduct our business following a co de of ethics. This is important since it helps us to operate with a clean conscious. It is also important since it avoids the exploitation of the consumer. In my future management work, I will strive to ensure that I keep to the business code of ethics. I will try to position the operation of the company with the need of other people in regard to the needs of the consumers and the need of the employees. I will strive towards implementing strategies for the company which reduces chances of exploitation.The paradox that comes from the movie is that while the farmers are exploited, they are not aware of what they produce. They toil in their field of battles but they are not aware of the value to their products. They are not aware of the price their products fetch in the market. At the same time the western consumers are not aware of what the Ethiopian farmers goes through in the field as they struggle to produce sweet for them. I have learnt that informing the consumers of what we are producing is very important since they become aware of the source of that product. It is important to inform the consumers about the product right from the starting of the production chain up to when it reached them. In this regard as a manager I will ensure that all products from the company bears clear information on the label and carry out advertisement to inform the consumers on the product. It is important for them to realize that what they are consume and where it has come from.ReferencesCKD, 2008, Director FAQ, Black Gold, Retrieved from http//www.blackgoldmovie.com/faq.phpon 12th march 2008Dempsey, J Campbell, R 1999, A Value Chain Approach to Coffer Production, Available at, http//www.acdivoca.org/852571DC00681414/Lookup/WRSpring06-Page5-7-ValueChainCoffee/$ charge up/WRSpring06-Page5-7-ValueChainCoffee.pdf.George, B 2004, Fordism, Social Analysis, Vol. 48, Issue 3, P. 2-5Gloria, C 1999, Managing Fraud and Integrity Risk, Arthur AndersonHoward, R 2004, Business Ethics Co mpany with a conscious, Myers Templeton, DenverIndependent Lens, 2008, Enron The Smartest Guy in the Room, Retrieved from, http//www.pbs.org/independentlens/enron/ on 12th March 2008Jacobsen, I 2000, Creating a Flexible Organization, The Innovator Leader, Vol. 9, Issue, 1, p. 6-9Kiechel, W 1995, Managing Innovators, Kiechel ResearchTutor 2U, 2008, Just in time Production, Retrieved from http//tutor2u.net/business/production/just-in-time.html on 12th March 2008Varghees, J 2000, Centre for leadership and management, Griffith University, p. 1Womack, J 2003, Lean Thinking, Harper BusinessYolles, M 2004, Organization Complexity and management, MCB Publishers

Floral Diversity in Organic and Modern Farming

Floral Diversity in complete and Modern FarmingIs Organic Farming better for floral diversity than young farming?1.0 Chapter 1 Introduction1.1 Introduction. Agriculture has had a profound impact upon biological diversity. Agricultural specialization, mechanisation and intensification ahead(p) to compaction and farming erosion, and poor farm concern, collect resulted in a global fall off in plant, invertebrate and bird numbers in juvenile decades (Stoate et al., 2001). The Law of Specialization has encouraged the clearing of natural habitat for the cultivation of a few species, with biodiversity being the victim of this trade off among productiveness and variety. This modern approach to market-gardening was encouraged and sponsored (i.e. through the Common Agricultural Policy CAP) by the g e reallyplacenment after the Second World War. The impact of ration was lock fresh in the minds of the UK population and a concentrated effort was made to increase rustic output. The ba by boom of the 1950s also added fillip to these efforts. The drive to increase agricultural output was a great success. New fertilizers (N, P, K) and pesticides (DDT etc) were extremely successful at improving crop yields. As time went by however, evidence began to slowly emerge of environmental damage.Despite growing environmental concerns, and numerous academic studies set offing the negative impact upon floral diversity by modern agricultural practices, the worlds population is estimated to rise to 9-10 billion by 2050, which promoter there will be change magnitude pressure on land to build new homes. Consequently, global aliment security is heavily dependant upon technological advances in browse to avoid Malthusians scenario of p all overty and famine over callable to overpopulation. The question is whether native farming is better for floral diversity comp ard with modern farming, exclusively ultimately, even if evidence points to the fact that original is much favo urable than modern methods, the question will be will it be capable of trifleing the growing demands placed on agriculture and solve environmental problems?1.2 Early concerns Rachel Carson sounded the exemplification bell against the processes and practices associated with agricultural intensification in her book, Silent Spring, published in 1962. In it Carson postulates a negative view on the change magnitude work of agricultural chemicals Since the mid-ni exonerateeen forties, over 200 basic chemicals perplex been created for enforce in killing insects, weeds, rodents and other organisms described in the modern vernacular as pests, and they ar sold below several thousand different brand names. The sprays, dusts and aerosols argon now applied almost universally to farms, gardens, forests and homes non-selective chemicals that rescue the power to kill every insect, the good and the bad, to still the song of birds and the leaping of fish in the streams to coat the leave s with a deadly film and to linger on in crack all this, though the mean target may be only a few weeds or insects. Can anyone believe it is possible to lay down much(prenominal) a barrage of poisons on the surface of the earth without making it unfit for all life? They should non be called insecticides but biocides. (Carson, 1962).Carson also talked about the detrimental use of Dichloro-diphenyl-trichloroethane (DDT). Research in the intervening years have somewhat validated her basic argument, though there were some criticisms concerning inaccuracies in her book. The Stockholm conclave is a global treaty to protect human health and the environment from persistent organic pollutants (POPs). POPs, of which DDT is one of a so called dirty dozen, are chemicals that remain intact in the environment for long periods, become widely distributed geographically, accumulate in the fattyty tissue of living organisms and are toxic to adult male and wildlife. In acting as a signatory to the Convention, the Government signalled its intention to eliminate or reduce the release of POPs into the environment.2.0 Pollution and Biodiversity Our knowledge of the ways in which Biodiversity is infixed for the survival of humans, in addition to many other species, is still evolving. From unidentified species to potentially undiscovered medicines, biodiversity is an issue of worldwide importance, providing natural re consultations which are essential for sustaining not only life on earth, but also economic activities. Biodiversity helps to maintain a healthy and stable environment in which businesses can operate, and its preservation is increasingly viewed by scientists, economists and businesses alike as a key part of economic stability.The growth of environmental legislation in recent times represents a governmental acknowledgement of, and response to, a strong body of scientific data establishing links between pollution and the environment. In the UK, The Royal Commission on Environmental Pollution, established in 1970, interpreted pollution in broad terms of the introduction by man into the environment of substances or energy probable to cause hazards to human health, harm to living resources and ecological arrangings, damage to structures or amenity, or interference with legitimate uses of the environment (Royal Commission on Environmental Pollution, 2004).The availableness of natural resources is dependant on a stable environment, which is maintained by complex interactions and processes within and between ecosystems. Any significant impacts of environmental pollution on biodiversity can impact upon our biosphere (Trevors, J.T., 2003). The costs following the loss of ecosystem services, and the resources they support, are unpredictable but likely to be considerable, therefore the management and minimisation of this happen should be of high strategic importance to any business.The Royal Commission on Environmental Pollutions broad definition of pollution effectively means that pollution can be anything that causes damage and/or aggravation to people, wildlife, or the environment such as chemicals, noise or gases. Due to the complex reputation of relationships between organisms in an ecosystem, the release of pollutants into the environment can not only kill organisms outright, but they can also change the conditions and processes occurring within a system and result in changes that can degrade entire habitats and disrupt ecological processes. These changes have the potential to cause long-run environmental change through the additive effects of their release.Pollutants arise from a variety of sources, such as toxic substances, accidental spills, industrial processes or illegal dumping. Not all pollutants are ineluctably synthetical, however, human activities often exacerbate or increase their polluting effects. For example, uranium is a naturally occurring radioactive waste that makes to be safely managed, increasing the risk of contamination and radiation that can cause lethal genetic mutations and killing living organisms. In terms of biodiversity, uranium mining often occurs in strange areas that are considered valuable for biological diversity, therefore the control of risks such as leakages into ground water and food chains is essential.The amount of pollution in the environment is a very significant issue pollution needs to be reduced in order to reduce its impact on biodiversity. Efforts to reduce pollution often infract the complex nature of environmental pollution. In the UK during the 1970s and 1980s there was a growing realization that freshwater eutrophication was an increasing problem. Initial research pointed to atomic number 15 from industrial pollution as the main source of pollution, particularly from Sewage Treatment Works (STWs) due to a growth in phosphate-based detergents. Additional 3rd treatment at STWs failed to reduce levels of eutrophication in the long-term and it soon became clear that diffuse pollution from agriculture was, and is, the main factor resulting in continued water select problems. The use of P fertilizer has generally exceeded agronomic requirements and led to soil P saturation. Whilst P is an essential plant nutritive, excessive concentrations are touch the ecosystems natural coping mechanism. The result is one of the most pressing environmental problems facing the UK today (Environment Agency, 2005).2.1 Ecological Impacts What are the associated ecological impacts of the post-war drive in agricultural intensification? The impact of this intensification on bird populations has been dramatic. Birds provide good indicators of environmental change as they are substantially monitored, well researched, and high up in the food chain (Furness and Greenwood, 1993). Between 1970 and 1990, Fuller et al (1995) found that 24 out of 28 species had contracted in range, with a dec trace of copiousness in 15 out of 18 species for which population change could be assessed. Of these species, seven had declined by more than 50%, declines being most pronounced amongst granivorous species (i.e., those with a substantial microbe component in the nourishment). Similar range contractions and population declines were not found in bird communities of woodland or other widespread habitat types over the like period.In addition to fertilizer and pesticide use, practices associated with agricultural intensification also included cultivation and re-seeding of grassland, simplified crop rotations, loss of marginal habitats and increase grazing levels. only of these practices were likely to have an impact on the approachability of food for nesting and feeding birds (Wilson et al, 1999). The case of the decline of grey partridge Perdix perdix L. populations in Britain however, complicates this assertion. The decline was partly attributable to poor chick survival as a consequence of the effects of herbicide-spraying of cerea ls on insect food supply and not of necessity a reduction in food availability (Potts, 1986). However, agricultural practices have affected arable flora in one way or another. What species have been affected?Gramineae (including wild species and stock feed crops e.g. rye grass) Many agricultural practices affect grass abundance e.g. after fertilizer operation, grazing intensification, herbicide application, cutting regime and ploughing. However, Wilson et al (1999) show that some of the practices had detrimental and non-detrimental consequences, some promoting abundance of some grasses whilst reducing abundance of others. For example, Increases in cutting, grazing, tillage, fertilizer applications and herbicide use of goods and services thus cause declines in species diversity, but favour those species responsive to these conditions, including the meadow-grasses Poa, which are of particular importance in the diet of farmland birds.Polygonaceae The Polygonaceae, represented on te mperate atomic number 63an farmland mainly by Polygonum (knotgrasses and persicarias) and Rumex (docks and sorrels), have the capacity for high seed production, making them a rich source of food for birds but invasive weeds of arable and grassland. Reviews of long-term population trends (Wilson et al., 1999) suggest that most Polygonaceae in arable areas are likely to have declined dramatically, whereas in pastures, roadsides, spoil heaps and waste ground, populations may be increasing.Chenopodiaceae This family on farmland is represented by Chenopodium (goosefoots), Atriplex (oraches) and Beta (mainly complaisant forage and sugar beets). In non-crop Chenopodiaceae, herbicide applications and grazing control populations whilst salad dressing may encourage growth due to preference for high Nitrogen concentrations. Populations have declined in arable areas (Wilson et al., 1999).Caryophyllaceae The main genera taken by birds on temperate European farmland are Cerastium (mouse-ears), Silene (campions and catchflies), Stellaria (chickweeds and stitchworts) and genus Spergula (spurreys). With the possible exception of chickweeds, decline of Caryophyllaceae on arable land is likely to have been widespread, but in pastoral areas and other fertile, disturbed areas, not subject to intensifier herbicide control, population of chickweeds and mouse-ears may be maintaining themselves or increasing (Wilson et al., 1999).Asteraceae Composites found on temperate farmland in Europe include Arctium (burdocks), Artemisia (mugworts), Carduus (thistles), Centaurea (knapweeds), Cirsium (plume-thistles), Helianthus (sunflowers), Leontodon (hawkbits), Senecio (ragworts and groundsels), Sonchus (sow-thistles), Taraxacum (dandelions) and Tussilago (coltsfoot), all of which are eaten by birds. Of these, sunflowers are oil-rich seed crops swelled mainly in warm temperate farmland, whilst the remainder are all found in the wild flora. Evidence points to declines caused by cultivation and herbicide use, and increases in response to increased grazing pressure and fertilizer use. Dandelions are adversely affected by regular ploughing, whereas modern grassland practices such as intensive grazing and inorganic fertilizer application probably favour growth. In the long term, populations of most composites are likely to be stable or declining in intensively arable areas, but in other fertile, disturbed sites, not subject to intensive herbicide control, populations may be increasing (Wilson et al., 1999).Brassicaceae The diet of farmland birds includes Alliaria (garlic mustards), Capsella (shepherds purse), Raphanus (radishes), Thlaspi (pennycresses), Brassica (includes wild and cultivated varieties of oilseeds, turnips and cabbages) and Sinapis (charlock). Overall, wild Brassicaceae have probably declined dramatically on intensive arable farmland in recent decades (Wilson et al., 1999).Fabaceae On temperate European farmland, Fabaceae are characterised by low, creeping nitrogen-fixers such as Medicago (cultivated lucerne and medicks), Trifolium (clovers and trefoils) and Vicia (vetches and beans). Better drainage and regular grazing encourage legumes, but loss of ley-based rotations has reduced the overall availability of clovers and vetches as sown crops. In the long-term, populations of wild clovers and vetches on farmland are likely to be declining due to herbicidal weed control and grassland improvement, but sown populations of plastered clover species (mainly white T. repens L. and red clover T. pratense L.) will mask these declines in areas where grass-clover leys are still sown (Wilson et al., 1999).Labiatae, On farmland, Labiatae are characterised by genus Galeopsis (hemp- bites), Lamium (dead-nettles) and Stachys (woundworts). Herbicide applications are detrimental to most members of the family. In the long-term, populations of dead-nettles and hemp-nettles are likely to be declining in arable areas, although dead-nettles may be increas ing in other fertile, disturbed habitats (Wilson et al., 1999).Ranunculaceae, Ranunculaceae (typified by buttercups Ranunculus) are in long-term decline in both arable and pastoral farmland, probably due to a combination of herbicide control on arable land, fertilization of grasslands, and loss of pasture to cultivation (Wilson et al., 1999).Boraginaceae, On farmland, Boraginaceae are characterized by genus Myosotis (forget-me-nots), which are known to be sensitive to herbicide applications. There is also some evidence that populations of field forget-me-not M. arvensis (L.) Hill are in long-term decline in arable land (Wilson et al., 1999).family Plantaginaceae, Violaceae, Herbicide application was the only agricultural operation recorded as having detrimental effects on Plantaginaceae (plantains) and Violaceae (violets and pansies) (Wilson et al., 1999).Urticaceae, A round off by Wilson et al., (1999) found no evidence of special impacts of agricultural practices on Urticaceae ( nettles). In the long term, however, common nettle Urtica dioica L. and annual nettle U. urens L. are likely to be stable or declining in arable habitats as a result of herbicidal weed control, but are probably increasing elsewhere in disturbed, fertile habitats.Amaranthaceae Amaranthaceae (pokeweeds) are serious agricultural weeds in the Americas (Cousens and Mortimer, 1995), and increasingly so as aliens in parts of Europe. A review by Wilson et al., (1999) found no data on the effects of agricultural operations on the abundance of this family in Europe.3.0 Analysis of Organic Farming3.1 Organic farming Organic farming has been shown to benefit some species. Recent studies in England suggest that organic systems support more broad-leaved plants than stately systems. (e.g. Kay and Gregory, 1999). Kay and Gregory (1999) found that, out of 23 rare or declining arable plant species, 18 were more abundant on organic farms, with 13 of them being absent on conventional farms. However, i f improvements were made in mechanical weed control technology in conventional farms these differences in plant abundance and species richness between the two systems could be reduced.3.2 Organic farming a solution? When the environmental problems in agriculture came into spotlight, different forms of organic farming had been do in Europe for several decades. These farming methods were quickly presented as a solution for most of the problems agriculture is facing. oneness reason for the increase in organic agriculture in many countries in Europe today is the need to solve environmental problems. In such situations, we often tend to accept good-hearted solutions. Furthermore, intensive propaganda by representatives of organic farming questions has had a strong influence on public opinion, politicians, and scientists. But what is the likelihood that Organic farming can meet the requirements of agriculture and solve some of these major environmental problems?Although some environm ental problems were already identified as a result of the industrialization of societies from the 19th century, the uncovering of broad environmental consciousness, as epitomized by the Silent Spring by Rachel Carson, took place in the 1960s. New research orientations, national and multinational environmental safeguard agencies, and environmental interest organizations were founded. Within agriculture several organizations, sharing a prejudiced view of nature, biodynamic and organic-biological, promoted their agricultural methods as a solution to the environmental problems. One theory of organic farming, biodynamic farming, which is part of a comprehensive philosophical system called anthroposophy, was presented by Steiner in 1924. Its aim was not to solve environmental problems but to introduce a form of production forces. Biodynamic and other forms of organic agriculture exclude easily soluble inorganic fertilizers and synthetic pesticides on principle (KRAV, 1999).A comprehensi ve review was made by Hole et al. (2005) of the impacts on biodiversity of organic farming relative to conventional agriculture. They identified a wide range of taxa, including birds, mammals, invertebrates and arable flora, which benefit from organic management through increases in abundance and/or species richness. Also highlighted were three broad management practices (prohibition/reduced use of chemical pesticides and inorganic fertilisers sympathetic management of non-cropped habitats and preservation of mixed farming) that are largely intrinsic (but not exclusive) to organic farming, and that are particularly beneficial for farmland wildlife.However, most problems that occur in conventional agriculture may also be present in organic farming, such as erosion, nitrogen leaching, ammonia volatilization from animal wastes, high levels of native soil cadmium, accumulation of trace metals in soil, and subsoil compaction caused by farm machinery. Organic farming methods do not offer solutions to many of these problems. For example, the exclusion of easily soluble inorganic fertilizer does not necessarily imply less leaching or less eutrophication. On the contrary, leaching of total N from soil receiving animal manure, either composted or anaerobically stored, can be much higher than from inorganic fertilizer applied at the same N rate if measurable over several years. Green manuring can also cause high nitrate leaching losses. From an environmental point of view, it does not matter whether the nutrients come from inorganic or organic sources. What matters is when, how and in what quantity plant nutrients are available to crops, i.e. if the nutrient supply is in synchrony with the demand of the crop (Myers et al., 1997).Crop quality is put forward as an important argument for organic farming. Crop quality depends on the plant nutrient status in the soil, the dynamics of nutrient release, weather conditions during growth, damage caused by pests, toxic compounds produced by the crops themselves and the adherent microflora, contamination with pesticides and pollutants, and the post-harvest treatment. Several investigations have clearly shown that the type of fertilization, contrary to the principle of organic farming, does not affect plant quality (e.g. Hansen, 1981) whereas the intensity of fertilization does. Thus, crop quality is not dependent on the principal difference between inorganic fertilization and organic manuring. Furthermore, considerable variation in crop quality can be found between farms regardless of whether they are using conventional or organic methods. This division into organic and conventional agriculture loses sight of the principal factors concerning crop quality and environmentally friendly agriculture.In contrast to conventional agriculture, organic farming without purchase of feed may result in a nutrient depletion of soils (Nolte and Werner, 1994). Through the import of feeding stuff to farms, which means a net i nput of nutrients, depletion is normally avoided. As the feeding stuff may be produced elsewhere with inorganic fertilizers, organic farming indirectly depends on the soil fetidness of conventional farming. However, regulations about the amount of conventionally grown feeding stuff to be used in organic farming differ between countries.Side-effects caused by synthetic pesticides and drug feeding are not found in organic farming, a positive result. However, the exclusion of pesticides may result in increased concentrations of secondary plant metabolites and of mycotoxins of field fungi. Eltun (1996) reported higher concentrations of deoxynivalenol and nivalenol in grain samples from organic than from conventional farming. Furthermore, in the same experiment no pesticide residues were found in grain samples grown conventionally. Thus, the exclusion of pesticides does not necessarily mean that crop products do not contain unwanted substances. The area for housing and outdoor movement of farm animals has received more attention in organic than in conventional agriculture. This concern is positive and space requirements should be determined for all types of farming. humankind have kept livestock for millennia, resulting in the selection of animals with behaviours that differs from the wild species. The natural behavior cannot be the only guideline for livestock management. It is important to keep animals in such a way that the special requirements of each species are fulfilled and destructive forms of behaviour are avoided.In order to understand todays organic farming movement, it may be useful to know that the highly influential form of organic agriculture, biodynamic farming (Steiner, 1975), had its roots in a philosophy of life and not in the agricultural lores. A common attitude within the organic movement is that nature and natural products are good, whereas man-made chemicals are bad, or at least not as good as natural ones. This way of thinking may also e xplain why man-made fertilizers and synthetic pesticides are excluded. Although there is no reason to believe that nature is only good, as exemplified in agriculture by crop failures, plant or animal diseases, and the effects of natural disasters, this romantic way of thinking is widespread. The forces of nature are fantastic and filled with still unknown secrets, but at the same time the results of natural activity may be bad. That is why natural conditions cannot be the only guideline for an ethical code about interactions between humans and nature. We have to define an ethical code that takes into account the full truth, and it is our responsibility to do so. As indicated above, views and beliefs originating from a philosophy of life are the madcap force behind organic farming. People should have free choice concerning religion or a philosophy of life and a strong ethical foundation is very important, but placing philosophical ideas above scientific thinking, especially if they contradict scientific results, leads to severe communication problems. For example, to demand the exclusion of synthetic fertilizers shifts matters of science into the field of dogma. The fundamental question, why plant nutrients should be added in organic forms or as untreated minerals only, has never been proved.4.0 Analysis of Alternatives4.1 Alternative solutions The bottom line is that current agricultural practices are not sustainable and alternatives are needed. Plant, invertebrate and bird numbers have all declined during the last century as a result of land management practices, whilst excess levels of fertilizer inputs have led to deteriorating water quality problems (of which, groundwater contamination and eutrophication are perhaps the most significant). The cause has been the increasing intensification and specialisation of farming, with a shift from mixed farming to arable farming in the east and grassland in the west. Biodiversity has also been impacted by the planti ng of decline cereals. Whilst Organic farming is being promoted as a better alternative, there is growing interest in the use of genetically modified-based agriculture.4.2 Biotechnology and Genetically limited Foods Biotechnology can potentially play a significant input into sustainable agricultural productivity, particularly for poor and/or small scale farmers in developing countries. Some of the benefits include knowledge of techniques to 1) facilitate enhanced resistance to insect pests/diseases responsible for reduced yields 2) ability to tolerate drought/salinity or heavy metals. The Nuffield Council on Bioethics, concluded in 2003 that some GM crops offer real benefits to those in the developing world. Thomas (SDI, 2003) uses the example of half the cotton grown in China during 2002 being genetically modified. The GM crops produced a toxin to the cotton bollworm, a pest that can devastate crops. Yields were estimated to have increased by 10% whilst there was a 60% decrease i n reported cases of humans being impacted by the toxic effects of applying pesticides without protective clothing. The report did, however, highlight a need for economic, political and social change.Watkinson (2000), in a study on sugar beet genetically modified to tolerate broad-spectrum herbicideglyphosate, found that densities of fat hen, a common weed in sugar beet, were less than 10% of those in conventional crops. The seeds of fat hen are an important winter food resource for farmland birds. Skylarks forage preferentially in weedy fields, so therefore the impacts of GM crops critically depend on the extent to which high-density patches of weeds are affected.Argentina provides another example. The uptake of Monsantos round-up ready soya was phenomenal during the mid to late 90s. Some 13 million hectares were converted to GM. However, increasing laterality of larger farmers has resulted in many smaller farmers leaving their lands. Traditionally, many people were employed for we eding but increased herbicide usage has resulted in unemployment and increasing concerns border the impact on human health (Branford, 2002). The benefits of using herbicide resistant crops in this context are therefore questionable. Monsanto needs to assess GM application in Argentina in order to learn from any mistakes and develop best practice guidelines for the future.Companies such as Monsanto and Syngenta appear, committed to principles of global sustainable agriculture and both have germplasm protection projects, in addition to community and environmental projects. Monsanto, in conjunction with Bayer CropScience BASF Dow Agrosciences Dupont and Syngenta have established an Agricultural Biotech Council (ABC) in order to promote a reasoned and balanced debate surrounding the use of agricultural biotechnology. However, it appears more like a union to promote the benefits of agricultural biotechnology.4.3 Biosafety During the Convention on Biodiversity (CBD) negotiations, governm ents were aware of the potential modern biotechnology had with regards the achievement of its 3 main aims the conservation of biodiversity, the sustainable use of the components of biodiversity, and the fair and equitable sharing of the benefits arising from the use of genetic resources. There was, however, a proviso for adequate safety measures for the environment and human health.This proviso constitutes Article 19 of the CBD, which relates to the handling of biotechnology and the distribution of its benefits. cardinal paragraphs constitute Article 19 and require parties to the Convention to1) take appropriate measures to ensure effective participation in biotechnological research activities, especially developing countries 2) to take practical measures to promote and advance access on a fair and equitable basis 3) to consider requirements of a protocol addressing (including advance informed agreement) and 4) pip available information about the use and safety regulations, as wel l as any information on the potential adverse impact of the specific organisms.Decision II/5, established an Open-ended Ad Hoc Working Group on Biosafety to develop a draft protocol on biosafety, specifically snap on transboundary movement of any living modified organism resulting from modern biotechnology that may have adverse effects on the conservation and sustainable use of biological diversity. The details and history of this working Group, from its formation to the subsequent adoption of the Cartagena Protocol on Biosafety to the Convention on Biological Diversity on the 29 January 2000, is rather convoluted.Environmental / human health consequences and concerns arising from introduction of GM plants led to the development of regulatory regimes to assess safety. Imports of GMOs into the UK (and EC) are covered by lively Community legislation Council Directive 2001/18/EC on the deliberate release into the environment of GMOs. The Protocol is therefore most beneficial to deve loping countries without lively legislation on GMOs and who require information before deciding on the conservational and sustainable impact of accepting GMO imports. In the UK, further EC regulations were adopted arising from the need to address exported obligations. Such issues have led to the implementation of EC Regulation No. 1946/2003 on the transboundary movement of GMOs.4.4 Does Sustainable Agriculture mean sustainable development? The Convention on Biosafety specifically addresses the variety of risks to rural ecosystems, particularly i

Detection of Vanadium Using Immobilizing 4-(2-pyridylazo)

Detection of Vanadium Using Immobilizing 4-(2-pyridylazo)Naked meat detection of volt using immobilizing 4-(2-pyridylazo)-resorcinol on functionalized HMSMohamad taghi Samadi1, Abas Afkhami2, Kadijeh Shamsi 1, *and Abdolmotaleb tell mohamadi1abstractIn this work, inexpensive visual sensor for the naked eye detection of fin by immobilizing 4-(2-pyridylazo)-resorcinol on the functionalized hexagonal mesoporous silica via N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride in aqueous mediae has been used. The effects of several factors much(prenominal) as pH, reaction meter, amount of the material, and the presence of various concentration HMS-TMAC-PAR has been studied so as to optimize in operation(p) conditions. The detection was result the people of colour change of PAR complexation with vanadium as of orange-yellow to purple in alkaline dissolvents. Furthermore, the good performance of the hexagonal sensors was dependent on main factors such as, the reaction time, a nd the pH value that showed possible naked-eye detection of vanadium concentration of special interest was that our mesostructu rubicund sensor design supply look into over the retention of the potential functionality of the naked-eye sensing system of vanadium ions upon the storage and even later several regeneration and reuse cycles, indicating wide-scale reversibility of sensing method actings. The detection and quantification marks for the method when determining vanadium were 40 ppbfour hundred ppb, respectively, with a correlation coefficient of 0.99. Good chemic stability of the substantial was seeing for a period of several months. groundingVanadium is ordinarily distributed in the earths crust but in little profusion. Vanadium at trace amounts re set outs a vital ingredient for normal cell growth, but slew be toxic when present at much concentration(1). the combustion of fossil fuel are described as one of the important sources of environmental pollution by vanadium si nce ember and oil are in among the richest sources of the metal . Usual deposits of vanadium in coal and basic oil vary amid 1 and 1.5103 mg/kg and it has been estimated that different 65103tons are released into the environment every year by natural discharges such as volcanoes and 2105 tons by anthropological resource(2). The concentration of vanadium in water is largely dependent on geo representical location and ranges from 0.0002 to more than 0.1 mg/litre in freshwater(3). the selective and sensitive detection of low concentrations of vanadium is very important (4). Though several methods are open for detection (AAS/AES1 ICPMS2 , ICPEAS3 (1, 5) but these methods are expensive, need sophisticated apparatuss and require extreme control of experimental procedures or unavailable for the on-site detection. The field of optical chemical sensors has been a growing research part over the last three decades. Chemical sensors are miniaturized devices that can supply real time and on-l ine breeding on the presence of specific compounds in even complex samples(6) In the last years, stir seen the appearance of mesoporous silicate-based sensing uses. Sensor system Mesoporous silicas, with large BET appear area, narrowly distributed condense size, high porosity(7), have shown unlimited potential for sensing applications in new years. Morphological control gifts them versatility in the mode of arrangement whether as monoliths, mass powders, thin films, or implanted in coatings. Great get hold areas and pore sizes greater has made them effective as adsorbent. This elude the leaching that can occur from physical encapsulation and mesopores can allow accessibility of analytes to many of active locates systems, UV-visible spectrophotometry has been often used for quantitative role of analytes(8).According to the recently research, The hexagonal mesoporous silica (HMS) is a material with high specific surface area and large pore diameter. HMS mesoporous silica has been first presented by Pinnavaia and co-workers(9) . present 0f high surface area and uniform pore size that make HMS suitable for catalyst supports(10) Moreover, Modifying the silica wall surface with organic groups to make their feature of speech and achieve specific goal(11).A inexpensive visual sensor for the optical detection of very low concentrations of many heavy metal based on functionalization with 4-(2-pyridylazo) resorcinol (PAR)(12). Its color changes from yellow to red while complexed with metal ions such as Cu2+. Various applications for PAR and its uniformities have been put into practice. Therefore a different heavy metal ions responsive optical sensor (HMS-TMAC-PAR) has been prepared by grafted surface functionalization of the original HMS with (TMAC4) and then via immobilization of PAR probe. HMS-TMAC-PAR has some important advantages as a significant-state colorimetric sensor(13) .In the present paper, a simple, selective and sensitive method is proposed for the vanadium determination at very low concentrations.2. Experimental2.1.Reagents and materialsTetraethylorthosilicate (TEOS) 98% (M = 208.33, d = 0.934 g/mL) were purchased from SigmaAldrich (Germany). dodecylamine (DDA) 98% (M = 185.36) was purchased from Merck, Germany. TMAC (50% wood spirit solution) was purchased from ABCR, Germany. PAR was purchased from SigmaAldrich (Germany) .Ethanol and toluene was purchased from Merck .All materials were of analytical reagent (AR) grade and used without further purification.2.2. Apparatus and instrumentsThe XRD experiments were performed by a APD2000 diffractometer using Cu K_ radiation over the range of 1.54A-.FTIR spectra of the samples were record in mid IR (400-4000 cm1) region on a PERKIN EL MER65 spectrometer, using KBr pellet technique. UVvis spectra were measured on a HACH DR -5000 spectrophotometer. In order to measure the pH value a HACH SENSION1 digital pH meter was used .2.3.Synthesis of hexagonal mesoporous silicaSynthesis of hex agonal mesoporous silica was achieved by dissolve DDA (200 mg) in a mixed solvent of water (0.28 L) and ethanol (0.19 L), after that the addition of TEOS (0.0112 L). The pH value of the solution was adjusted to 911 with HCl. The finishing gel was stirred continually at room temperature for 18 h, and The product was filtered, washed by abundant distilled water, air-dried in an oven at atomic number 6-C.and then was accomplished by calcinations at 640-C for 4 h in air to remove the organic template.2.4. Fabrication of HMS-TMAC-PARAnhydrous toluene containing TMAC and HMS was refluxed for 18 h under an N2 atmosphere. The reaction mixture was washed thoroughly with ethanol and water to remove unreacted TMAC and then material was dried in an oven at 65 -C for 12 h to obtain HMS-TMAC. The immobilization of PAR on HMS-TMAC was performed by the addition of 0.6 g HMS-TMAC solid to PAR solution (93 106 M, 180 mL) in stirring for 3 h. it was washed with water to remove unreacted PAR. The mat erial was dried in a vacuum oven at 65 C overnight and then ground to fine powder. The synthetic routes of HMS-TMAC-PAR were illustrated in Scheme 1.Scheme 1. HMS-TMAC-PAR2.5.Detection procedureBatch and column processes were busy to study the detection of vanadium from aqueous solutions with HMS-TMAC- PAR. Concentration of stock solutions of vanadium (V) (1000.00 g ml-1.) Prepared by dissolving 2.2965g ammonium metavanadate (99.99% Merck) in 1000ml of 5% hydrochloric acid solution. The suspension solutions of HMS-TMACPAR (0.5 g L1) were prepared in aqueous solution at different pH values, which were adjusted with 0.2 M NaOH or 0.2 M HCl. Every time a 2 mL suspension solution of HMS-TMAC-PAR was filled in a 1 cm quartz cell and various stock solutions of cations were added into the quartz cell piecemeal by using a micro-syringe. Standard and blank solutions were prepared, in all the experiments in the same way as those samples. The linear working range for measurements was (y = 0. 005x + 0.015, R2 = 0.990).The vanadium was estimated qualitatively using naked-eye colorimetric assessment and it was detected quantitatively using UVvis reflectance spectrometry at 510 nm.3.Results and discussion3.1.Characteristics of HMS-TMAC-PARThe XRD patterns of samples are displayed in Fig. 1. The XRD measurements were employed in order to study the mesoporous structure of the supports. the patterns have a single low-angle diffraction peak at about 2 =1.9- for HMS and HMS-TMAC- PAR.but, the intensities of the peak of sample HMS-TMAC- PAR decrease, connotative of that the mesoporous structure of sample HMS-TMAC- PAR. happen to fewer uniform ahead the foreword of the organic molecules interested in HMS(13).Figure 1. XRD patterns of HMS and HMS-TMAC- PAR.FT-IR spectra of HMS-TMAC-PAR is shown in Fig. 2. The HMS-TMAC-PAR sample show the characteristic Si- O- Si bands associated by the shape of a condensed silica network that be present at 1091, 965, 799 and 459 cm1. The findings revealed that the mesoporous silica (HMS) has been grafted via TMAC organic molecules(13).Fig. 1. FT-IR spectra of (a) HMS, and (b) HMS-TMAC-PAR.3.2.Calibration graphThe effects of various factors such as pH, reaction time, amount of material needed, and the presence of various concentration of vanadium were studied to optimize the conditions for quick visual detection of vanadium.Fig..3represents the absorbance of HMS-TMAC-PAR at 510 nm against vanadium concentrations and shows a linear correlation in the range from 40 to 500 ppb with a correlation coefficient of 0.99 . The nonlinear nature of the curve at higher concentrations is due to saturation effects.Fig.3.Calibration curves of the absorbance of HMS-TMAC-PAR with different concentrationsof vanadium at pH 12.0 at 510 nm.The detection limit of HMS-TMAC- PAR for vanadium was also tested. Fig. 3 represents the absorbance of HMS-TMAC-PAR at 510 nm against vanadium concentrations and a good linearity relationship was gained in the range of 40 to 500 ppb with a correlation coefficient of 0.99. The spectrometer detection limit (DL) of vanadium using HMS-TMAC-PAR was estimated from the linear part of the calibration plot, according to the Eq. (1)DL = (1)where k is a factor equal to 3, m is the slope of the calibration graph in the lin-ear range, and Sb is the standard deviation for the blank. Here, The accuracy and precision of the method were tested by five successive measurements using a standard solution of 200ppb of vanadium. The resultant DL value is 0.88ppb.3.3. deed of the pHIn order to determine the pH effect on the detection capacity of HMS-TMAC- PAR in batch experiments, solutions were prepared at different pH levels ranging from 2, 7 and 10.The pH-dependence studies showed that the complexation of vanadium with HMS-TMAC- PAR is formed in a wide range of pH, from 2 to 10(Fig. 4), which is similar to the results reported by Gang Li et al(13) . Also displays that upon the addition of vanadium, the vir tual maximum absorption at pH 10.0, which has been selected as the specific pH for observe vanadium in aqueous solution using HMS -TMAC- PAR. Hence, the maximum color and spectrum development of VHTPn+ complexes were at a pH value of 10.Fig. 4. Effect of pH on absorbance at 510 nm in UVvis spectra of HMS-TMAC-PAR (0.5 g L1 ) with vanadium 200ppb.3.4. Effect of the reaction timeStudies on the reaction time indicated that the energizing time response of the VHTP complex formation was studied by constantly monitoring the absorption spectra .as shown in Fig. 5. After addition of 200ppb of vanadium, the absorbance increases rapidly inwardly 90 s and in that case residue constant with time, so shows that the reaction has completed. . Therefore HMSTMAC- PAR had been can suplid rapid colorimetric detection.Fig. 5. Response time of HMS-TMAC-PAR (0.5 g L1, pH 12.0) with vanadium 200ppbthe later addition of vanadium ions, the color change of the sensors as a function of time. The findings re vealed that charge transfer among the vanadium and PR probe has been accomplished in a short time (30 s Response time 180s) caused by the aptitude of the nanostructured sensors with open, great, and identical pore architectures to let the able binding of vanadium ions with graft PR-probe. actually the high metal change, that is ion transport, and the similarity of the metalligand binding were significantly affected by the structural sound structure and geometry, as obviously evidence from the Response time value(14).3.5. Effect of sensor amountStudies on the sensor amount (Fig. 6) indicated that In actual fact, porosity, high surface area of the HMS hexagonal materials are beneficial to permit high adsorption capability of the chromophore investigation in quick kinetic systems. The amount adsorbed of the probe have a important roul in making a significant ion-sensing system. but , results show that the nature of the ion-sensing system is also reliant on the amount of solid support -probe used. On the other hand, the PR probe concentration significantly led to better sensitivity of the chemo sensors. The results show that 0.5 gr of sensors was enough to monitor a respectable color separation between the blank and the sample even at low vanadium ion concentration.Fig. 6. Effect of HMS-TMAC-PAR sensor amounts with vanadium (200 ppb) at pH 10.0, 510 nm3.6. Effect concentration of vanadiumIn order to evaluate the effect of initial vanadium concentration, The naked-eye detection is achieved at a concentration range of 40400 ppb using HMS-TMAC-PAR Fig.7. A considerable color change for HMS-TMAC-PAR is observed from yellow to purple with an increase in vanadium concentrationFig. 7. Color reaction of HMS-TMAC-PAR (0.5 g L1, pH 10.0) with various concentrations of vanadiumconclusionsA highly sensitive optical sensor for the visual detection of low concentrations of vanadium is designed by the immobilization of PAR on the functionalized HMS. The high sensitivity of the optical sensor could be caused by its high surface area and the uniform pore sizes and pore shapes of the mesoporous silica. Controlled experimental conditions also allowed naked-eye detection of vanadium ion concentration with detection limit as low as 0.88ppb In alkaline solutions .generally, HMS-TMAC-PAR provide strange sensitivity, reusability and libertine colorimetric detection of heavy metal ions, particularly vanadium for track of heavy metal pollutants in the environmental samples. The findings revealed that it could be successfully used as a colorimetric optical sensor for the quantitative and qualitative detection of very low concentrations of vanadium in various samples.REFERENCESPyrzyska K, Wierzbicki T. Determination of vanadium species in environmental samples. Talanta. 200464(4)823-9.Adachi A, Sawada S, Shida K, Nakamura E, Okano T. Determination of vanadium in foods by atomic absorption spectrophotometry. Science and Technology of Advanced Materials. 19995(1)15-21. Full TOC. 6.12 Vanadium. Changes.52380.Hiraki K, Nakaguchi Y, Morita M, Kitamaki H. Determination of trace vanadium by addition of both sodium selenite and calcium chloride with polarized Zeeman effect graphite furnace atomic absorption spectrometry. Analytical sciences. 19862561-6.Filik H, Berker KI, Balkis N, Apak R. Simultaneous preconcentration of vanadium (V/IV) species with palmitoyl quinolin-8-ol bonded to amberlite XAD 2 and their separate spectrophotometric determination with 4-(2-pyridylazo)-resorcinol using CDTA as masking agent. Analytica chimica acta. 2004518(1)173-9.McDonagh C, Burke CS, MacCraith BD. Optical chemical sensors. Chemical reviews. 2008108(2)400.Morante-Zarcero S, Snchez A, Fajardo M, del Hierro I, Sierra I. Voltammetric analysis of Pb (II) in natural waters using a carbon paste electrode modified with 5-mercapto-1-methyltetrazol grafted on hexagonal mesoporous silica. Microchimica Acta.169(1-2)57-64.Melde BJ, Johnson BJ, Charles PT. Mesoporous silicate ma terials in sensing. Sensors. 20088(8)5202-28.P.T. Tanev, M. Chibwe, T.J. Pinnavaia, Titanium-containing mesoporous molecular sieves for catalytic oxidation of aromatic compounds, Nature 368 (1994)321323.Martn N, Lpez-Gaona A, Viniegra M, Villamil P, Crdoba G. Synthesis and characterization of a mesoporous HMS and its use as support of platinum catalysts. Reaction Kinetics, Mechanisms and Catalysis.101(2)491-500.Aguado J, Arsuaga JM, Arencibia A, Lindo M, Gascn V. Aqueous heavy metals removal by adsorption on amine-functionalized mesoporous silica. diary of Hazardous Materials. 2009163(1)213-21.Balaji T, Sasidharan M, Matsunaga H. Naked eye detection of cadmium using inorganic-organic hybrid mesoporous material. Analytical and bioanalytical chemistry. 2006384(2)488-94.Liu T, Li G, Zhang N, Chen Y. An inorganic-organic hybrid optical sensor for heavy metal ion detection based on immobilizing 4-(2-pyridylazo)-resorcinol on functionalized HMS. Journal of Hazardous Materials.201-202(0)1 55-61.Zhang N, Li G, Cheng Z, Zuo X. Rhodamine B immobilized on hollow Au-HMS material for naked-eye detection of Hg 2+ in aqueous media. Journal of hazardous materials. 2012229 230(2012)404-10.1 -Atomic emission spectroscopy2 Iinductively coupled plasma mass spectrometry3-Inductively Coupled Plasma Atomic Emission Spectroscopy4 N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride

Comparing Women in A Mans Requirements and A Letter to Her Husband Ess

Subservient Women in A Mans Requirements and A Letter to Her Husband Authors use poetry to creatively present attitudes and opinions. A Mans Requirements, by Elizabeth Barrett Browning, and A Letter to Her Husband, Absent upon Public Employment are two poems with distinct attitudes about love that contain diametric literary approaches. In both of the poems, love is addressed from a different perspective, producing the difference in expectation and presentation, but both suggest the women are submissive in the relationships.In A Mans Requirements, Elizabeth Barrett Browning uses repetition, flowery language, and strategic role play to expose her regard for mans knowledge of love. The narrator repeatedly pleads the phrase Love me, followed by his conditions, which are painted with adored language such as with thine azure eyes, Made for earnest grantings. For the narrator, the purpose of the poem is to request love more specifically, its a demand for love, but Browning equips the narrator with a begging tone and flattering language, lightening his demand...

Michael Clayton: Attorney Client Privilege Essay -- Film Analysis

It is a plot line that seemed to come straight knocked out(p) of a John Grisham novel. later all it had all the major elements a conspiracy, a corrupt corporation, but most importantly a lawyer examining his inner conscience only to determine to break with the status quo and expose his corporate masters. In fact, one could say that the film Michael Clayton (2007), was a modern day John Grisham film that never was. In all certainty, Michael Clayton is a typical Hollywood movie with a typical Hollywood ending where good defeats evil and where truth prevails over obfuscation.That does not imply that it should be dismissed so readily however. The film Michael Clayton still raises many of the ethical questions within the legal profession. Namely, the film explores the concept of the Attorney Client Privilege, and through and through its plot and rich storyline, questions the very notion of it. However, it is easy to forget that the film is a pure work of fiction and although it does a adequate job of pointing out the disadvantages of the Attorney Client Privilege, its assertion that the privilege should be eroded when the attorney knows that his or her client is lying, is just as phantasmal as the scenes be which are in the film.Im not a miracle worker Im a janitor, remarks Michael Clayton in one of the opening scenes of the film. An apt phrase because Clayton has been dispatched to dominate in a fellow associate named Arthur Edens who is suffering from a manic breakdownstripping off his clothes during the middle of a deposition and racecourse around naked in the parking lot. Visiting Edens in jail after the incident, the sighs of the breakdown showed no sighs of subsiding. In the middle of a conversation with Clayton, Edens goes on a tirade, eventually aski... ...t everyone has a job to do. Lawyers areand should not bean exception to that rule.Works CitedFreedman, Monroe H., and Abbe Smith. Understanding Lawyers Ethics. New Providence, NJ LexisNexis, 2010. Print.Kairys, David. Legal Education As Training For Hierarchy. The Politics of Law a Progressive Critique. By Duncan Kennedy. New York Basic, 1998. 54-75. Print.Keefe, Patrick Radden. Michael Claytons Devastating Critique of the Legal Profession. - By Patrick Radden Keefe. Slate Magazine. Washington Post.Newsweek Interactive Co. LLC, 19 Feb. 2008. Web. 10 Mar. 2011.Shanahan, Sara Jane. Another View The Eroding Attorney-Client Privilege - NYTimes.com. NYTimes.com. The New York Times Company, 2 Nov. 2009. Web. 10 Mar. 2011.Simon, David. The Attorney-Cleint Privilege As Applied to Corporations. Yale Law Journal 65.7 (1956) 953-90. Print.