Nobody downloaded yet

Exam papers - Essay Example

Comments (0) Cite this document
Summary
Unlike the oxidative properties of the ground-state oxygen, singlet oxygen which by nature works in its excited state is capable of degrading molecules through photosensitization. A singlet oxygen is typically produced by a photosensitizer pigment with which such element…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.1% of users find it useful
Exam papers
Read TextPreview

Extract of sample "Exam papers"

Download file to see previous pages PCBs are organohalogens prepared by having chlorine react with biphenyl, an aromatic hydrocarbon used as a heat-transfer fluid. These compounds are found to have high resistance toward decomposition and due to low levels of environmental degradation, PCBs proceed to dwell in bodies of water, soil, and in an organism’s fatty tissue. They are biologically toxic to aquatic creatures, both vertebrates and invertebrates. As a grave hazard to human health, PCBs may lead to dysfunction of liver, carcinogenic effect, dizziness, and dermatitis.
Several factors may affect the soil’s interaction with exogenous organic compounds including soil aggregation by waste products of bacteria. Besides aggregate stability, the interactive potential or resilience of soil to exogenous organic matters may be determined further by factors as land technology used, farming system, and agricultural management employed.
In the field of biotechnology, this can be demonstrated in terms of the water’s reaction to break polymeric bonds such as the ester links that are often present between two amino acids in a protein. After such bonds have been broken, a hydroxyl group (-OH) in water is yielded to one of the products while carboxylic acid becomes of the other upon acquisition of H+. Moreover, the environmental degradation of endogenous substances may be hydrolytically carried out with the aid of catalyzing enzymes in the process of decomposing other polymers like nucleotides, complex sugars, starch, and even fats.
Atrazine --- derived from the synthesis reaction involving cyanuric chloride, the chief precursor to the toxicity of atrazine, and isopropyl amine; this reaction is performed in xylene or toluene in the presence of water and addition of NaOH;
Benzpyrene --- the new key reaction for the production of the environmentally carcinogenic benzo[a]pyrene (BaP) includes the method of coupling of naphthalene 2-boronic acid with ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Exam papers Essay Example | Topics and Well Written Essays - 1750 words”, n.d.)
Retrieved from https://studentshare.org/environmental-studies/1612037-exam-papers
(Exam Papers Essay Example | Topics and Well Written Essays - 1750 Words)
https://studentshare.org/environmental-studies/1612037-exam-papers.
“Exam Papers Essay Example | Topics and Well Written Essays - 1750 Words”, n.d. https://studentshare.org/environmental-studies/1612037-exam-papers.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Exam papers

Research papers

... QUESTION Short messaging has always been one of the basic ways many people, old and young communicate to achieve or pass messages which they now consider a better way of communication. Shorty messaging dates back to some years when the mobile phones were introduced and have spread to all parts of the world’s leading to integration into human life. SMS mobile company is one of the numerous leading companies that make it possible for many people to communicate effectively and therefore leading to the ease of communication that we experience today. A research has been designed to outline and highlight the features of the service that exist and are satisfactory top the users. The research shall also identify the challenges as well... QUESTION...
14 Pages(3500 words)Research Paper

Speech papers

...?Speech Paper: Since the year 2001 or shortly after the 9/11 attacks in America and the ensuing War on Terror, there have been significant bias and prejudice in media coverage that portray Arabs and Islam as a whole. There is no need to look hard because the fact is obvious for everyone to see: the Arabs and Islam are almost always covered in negative light particularly in the Middle Eastern conflicts - always being associated with terrorism, extremism, religious fanaticism, and violence and nothing else. In an investigation on the subject in the Australian context, Manning analyzed more than 12,000 news articles from 2000 to 2002. He uncovered the unsettling fact that Arabs and Islam have been on the news because of: 1)...
3 Pages(750 words)Essay

Answers for past exam papers

... What do you consider to be the main contributions of the Human Relations School to our understanding of human behaviour in organizations? The Illumination Studies occurring between 1924 and 1927 at Hawthorne was the first genuine movement that steered away from Taylorism (Scientific Management) in which it was believed that the organisation, job design and labourers could be statistically ordered to improve efficiency and productivity. These studies recognised that it was not only the tangible factors of the organisation (e.g. lighting) that contributed to worker motivation and commitment. Though Taylor recognised that there was disparity between talented and untalented, or unmotivated workers and finding proper job alignment... What do you...
16 Pages(4000 words)Essay

Analyze papers

...despite the harsh economic conditions in the society (Boggs p 3). Thesis: American colleges are democratic, diverse and offer equal opportunities in access of quality education American colleges are democratic since citizens have equal access regardless of age, gender, race or ethnic background. The education is accessible, quality and ensures a learning lifeline for the rural communities. The community colleges offer critical workforce for the nation since a majority of the first responders including firefighters, police officers and paramedics have postsecondary credentials (Boggs p 3). The education provide local economies with required skills such as the Alabama Southern Community College that offers paper technology...
4 Pages(1000 words)Essay

Politic papers

...1. Memo to Secretary of Condoleezza Rice I am sure that you know about the many short-term and long term challenges that North Africa and the Middle East are facing nowadays. These challenges do just affect these areas politically, economically and socially, they also pose a great threat to the very survival of its people. Fortunately, the United States, with all its resources, can do a difference in the lives of the people in these parts of the world. I therefore submit to your good office the following points for consideration in formulating policies for interventions in these areas. a. Security Issues Human security is one of the greatest challenges faced by the Middle East and North Africa Region. Wars have raged... Memo to Secretary of...
7 Pages(1750 words)Essay

Papers

...create their personal accounts on the social networking website and can communicate to people of entirely different caste, culture, religion, ethnicity etc. It also provides a platform to search your long forgotten school mates, class mates, office friends etc. People can add different other people to their network and interact with them. The name of the website has been derived from the paper face books depicting members of a campus community that some US schools and colleges used to give to the incoming students to acquaint them with various faculties, alumnae, seniors etc. The networking website has been created by Mark Zuckerberg, along with fellow students and his roommates Dustin Moskovitz and Chris Hughes while...
10 Pages(2500 words)Essay

Response papers

...Your F. 26 April Response Paper 12 For article number 34, “The Job Ghetto,” by Katherine Newman and Chauncy Lennon, discusses employment and job availability in our society. Sometimes people are so hard pressed for finances that instead of working, they turn to government assistance. The suggestion at the first part of the paper suggests that maybe it is too easy for someone to have free money given to them while receiving welfare benefits when they could instead be earning it. During the time of this writing, unemployment rates in the United States were down though they have significantly increased during the last two presidential terms. However, is it really that easy to find a job? That is the...
6 Pages(1500 words)Essay

Management papers

...Management Papers Enron’s former CEO Jeffrey K. Skilling and ex CFO Andrew S. Fastow produced and carried out business thoughts that created major problems, that could not be solved either ethically or legally thus causing the downfall of the organization. For this purpose, company was created to be an asset light company as its risk management and trading skills were applied to assets heavy outsiders. In order to maintain its high credit rating and raising more capital, most of its assets were relocated by Enron into complex off-the-book special purpose units. The key players in this fraud, the top management, preferred their own short-term fiscal profits and stakeholder deceit that destroyed not only their business,...
1 Pages(250 words)Essay

Reaction Papers

... of Learning: Reaction Papers Social Relationships and Health In this article, the review is based on two major cooping theories namely, social integration and social support. These factors are said to have detrimental effects on the health of a given society. Further, the article observes that in social support the society aims at consoling the patient to cope with the stress while social integration is more related to the influences that communality and identification with the society has on the patient (Cohen 676-682). In this line of thoughts this article pushes the mind of the reader to reflect on the setting of the society he lives in. The reader evaluate if his society impacts positively or negatively on the general health...
4 Pages(1000 words)Essay

Past exam papers

... SECTION A Question one a) The entrepreneur supplies profit maximizing effort under perfect competition. In perfect completion there is no sunk cost, firms operate at the same technological level and economies of scale is broken down by small level of output in relative to demanded quantity. The entrepreneur maximises profit at the point when the marginal cost has the same values as marginal revenue. b) Entrepreneurs make judgmental decisions on coordinating the scarce resources. Presence of an entrepreneurial input market affects the amount of the effort that should be supplied by the firms therefore; the entrepreneur makes decisions on how much effort that they should supply themselves only. As such, amount of firm effort... SECTION A...
3 Pages(750 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Exam papers for FREE!

Contact Us