Natural Selection Essay Example for Free

Natural Selection Essay Natural selection, according to Gulick, is the process through which heritable attributes that are beneficial or vital for survival and reproduction become a common thing in a population, whereas harmful characteristics become rare (p, 27). Natural selection occurs as a result of successful reproduction by persons who have advantageous traits (Darwin p, 39). This results in adoption of beneficial traits by the subsequent generation. Over a number of generations, adaptations take place through successful combination of small, random alterations in traits, as well as natural selection of the changes best suited for a particular environment. Genetic drift on the other hand results in production of random alterations in the number of characteristics in a population. Genetic drift occurs as a result of the role played by chance in determining whether an individual will live on and reproduce (Starr, Taggart, and Starr p, 415). The greatest controversies of biology are found in the unity and diversity of life. Naturalists have greatly employed Darwins explanation of unity or organic forms in order to resolve this controversy. Darwin applied the concept of evolution to every living thing including human beings, and claimed that all individuals, who belong to the same species, reveal some sort of variation between them (Goodenough, Wallace, and McGuire p, 9). According to Darwin, individuals who have advantageous features, for both reproduction and survival, pass them down through genetic inheritance from one generation to the other. Darwin teaches that variation, on which natural selection plays a role, is basically of small magnitude and that indefinite variation in all directions as well as the progressive accumulation of a particular series of variations, all resulting in the production of a novel species, occurs as a result of natural selection (Gulick, 28). In his theory of natural selection, Darwin stated that only those organisms that have the advantageous characteristics that suit a particular environmental condition are selected by nature. Natural selection, therefore, turns out to be a vital aspect in the evolution process (Darwin p, 45). Unity and diversity of life comprises of the dual facets of life on earth. Natural selection gives an account of the relatedness among organisms in a population by revelation that different animal species are related through descent from a common ancestor (Gulick p, 25). Modern animals, including man, are believed to have originated from a common simple ancestor. However, as a result of increased complexity, modern species appear different from the ancestral species. Nevertheless, a remarkable evidence of unity of life is revealed by the similarities in the molecular structure of species. Modern molecular studies reveal biochemical similarities between different species. Comparison of DNA sequences between human beings and apes reveal a close genetic similarity. This reveals that these two species probably had a common ancestor (Starr, Taggart, and Starr p, 410). Natural selection also gives an account of the great diversity that is displayed by modern species. Organisms that have distinct traits that enable them to live in environmental niches not occupied by similar organisms, according to Starr, Taggart and Starr, possess a greater chance of surviving (p, 410). Over generations, species which originated from a common ancestor have diversified in addition to occupying more and more environmental niches in order to take advantage of unutilized resources. Modern species are a phase in the progression of evolution, and their diversity results in the development of a series of speciation as well as extinction. Diversity of life, according to Gulick, does not result in development of a completely new and unique organism, but rather in organisms that share certain morphological similarities (p, 27). Vestigial characteristics that have no specific role resemble functional ancestral characteristics, and as a result, organisms can be categorized using these similarities into a ladder of connected groups. Work cited: Darwin, Charles. Natural Selection: The Global Struggle for Existence, ISBN 1565430824: Lulu. com, 2008 Goodenough, Judith. Wallace, Robert. and McGuire, Betty. Human biology: personal, environmental, and social concerns, ISBN 0030012813: Saunders College Pub. , 1998 Gulick, John. Evolution, Racial and Habitual, Controlled by Segregation, ISBN 1115895672 BiblioBazaar, LLC, 2009 Starr, Cecie. Taggart, Ralph. and Starr, Lisa. Biology: the unity and diversity of life, 10th edn, ISBN 0534388000: Thomson Brooks/Cole, 2004

Social Problems: Causes and Solutions

Social Problems: Causes and Solutions Introduction Sociology seeks to discover, describe and explain the order which characterises the social life of man (Inkeles, 1964 cited in McNeil and Townley, p.21).Various attempts have been made to define social problems; however there is no adequate definition of social problems. Birenbaum and Sagarin defined social problems as, ‘’ A social problems exists when the collective society is rent by, at the very least a public recognition that there is a sector of society, represented by its practices, which threatens or prevents others or themselves from establishing or maintaining their claims to membership’’ (Birenbaum and Sagarin, p.16). Rubington and Weinberg, offers their own definition of social problem as, ‘’an alleged situation that is incompatible with the values of a significant number of people who agree that action is needed to alter the situation’’ (Rubington and Weinberg, 1989 p.4). The definition of any problem as a social probl em, means that it is a problem that requires that affects society as a whole and needs society to come together to deal with the problem (May, et al eds 2001 p.17) Social problems are approached from a constructive perspective and a realist perspective. Saragu develops a social constructive approach to the intersection of social divisions and policy, Bucchi on the other hand develops an introduction to the post structuralist critique of problem and policy centred approach (May, et al eds (2001 p.13). Constructive perspective of social problems looks at social problems three main aspects; namely the society constructs as a problem, the contested character of social construction and the changing character of social construction (May, et al eds 2001 p.8) A realist perspective looks at social problems as real problems that exist and which everyone agrees to their existence and requires explanation. The constructive perspective on the other hand, looks at social problems as a constructio n of society. The question they ask is who says there is a social problem what sort of social problem, do they say it is (May, et al eds (2001). The main issue between the different perspectives of social problem is whether social problems are factual and objective for sociologists to investigate and explain. This essay will look at social problems and the difficulty of solving them. I will start by looking at common factors relating to social problems. Common factors relating to social problems All social problems are prone to a number of different definitions and interpretations. The journalist looks at a social problem from a perspective different from that of a sociologist or a philosopher. The journalist may report a problem in a certain manner, there by actually exaggerating the real problem and causing further alarm in the society. Sociologist will interpret a social problem from a different perspective. Different explanations of social problems are another common factor relating to all social problems. People usually do have different explanation why social problems occur. Society is always looking for whom to blame for a social problem. They always attribute the cause of a problem to the individual, family or the government. How a problem is presented, is another common factor relating to social problems. The press do play a role in this regard. Journalists are interested in sensational news which they feel will interest the public. Issues are termed social problems, when they are brought to the knowledge of the public and they become part of the public discourse Professional intervention is another fact common to social policies. Professionals in our society are quick to label people, that they believe do not conform to ‘standard normal behaviour’, they more often than not marginalise such people and segregate them, (e.g.) special schools, special needs. The victims view point is another factor that is common in all social problems. There is a world of difference between the way a victim sees himself and the way society views him. Society stereotypes certain people. We all have our prejudices, knowingly or unknowingly. The way the society views homeless people is different from the way homeless people view themselves. Finally, how to find the solution to social problems is an element that is common to all social problems. There is no generally accepted way, social problems can be solved. Some solutions can be very complex, while others appear straight forward. Anti Social Behaviour Order (ASBO) was introduced as a straight forward solution to deal with anti social behaviour. However, many young people now regard ASBO as a badge of honour (The Guardian, Monday November 6 2006). To tackle the issue of juvenile crimes and ethnic groups will require complex situations. Causes of Social Problems Generally speaking a perspective means a way of looking at things. I will now briefly look at the causes of social problems from different perspectives. I will first look at the individual perspective. Some commentators argue that criminals were abnormally conditioned by biological and environmental factors (Rubington and Weinberg, 1989 p.33). Others however argue that causes of social problems are due mainly to the society/ environment and not due to the physiological make up of individuals. However, certain actions of individuals or groups are so glaring that they causes of social problems are directly attributed to them. Another reason why social problems occur is due to peer group or family pressure. Disagreement between individuals or groups in a society can also lead to social problems. This is called the interaction perspective. Fall out between different cultures and religion in a society is a reason why social problems occur. People are usually influenced by their culture and religion. Some people are very fanatic in their views and believe and see some one of a different faith or race as different from them. This can to a lot of social problems. Social structures are the very basic foundation of any society, and it is a major reason why social problems occur. Some individuals or group might feel excluded from the social, economic or political structures of society. The social structures of society might be designed in such a way that they shut off or marginalise certain segments of their society, usually minority groups. Added to this is that government interferences and policies, might cause social problems, as they may favour certain segments of the society while excluding others. Examples of Social Problems Poverty Poverty has so many definitions. Poverty is powerlessness. It has so many faces and it is changing from place to place and across time (World health Organization, 2001). Absolute poverty is disenabling. It means that one can not afford the basic human requirement. By this, I mean that it robs one of many things in life, including his dignity and pride. Relative deprivation means that one is not keeping up with the standards in a given city. Poverty is one of the major reasons why people are excluded from the political, social and economic structures of society (Maxwell and Kenway, 2001). Poverty is usually constructed by a distinction between normal people, and those that are poor. The constructive perspective of poverty does not deny the existence of poverty, but that only some people at some time and in some place will be labelled as being in poverty May, et al eds 2001 p.7) A realist perspective will look at poverty as objectively describable and will attempt to offer an explanati on. Juvenile delinquency Juvenile delinquency is a complex, serious problem. The cause of this problem includes peer pressure and the failure of our social structures, among others. However it is not a new phenomenon. In 1880, the penologist Enoch Wines, wrote, ‘’ Delinquent children, the criminals of the next generation, must be prevented from pursuing their criminal carers; they are born to it, brought up to it. They must be saved’’ (Wines, 1880, p.132 cited in McNeil and Townley, p.21-27). We can not overstate, the fact that Juvenile delinquency is a huge social problem today. The government have tried to deal with it, with legislation, cumulating in the crime and disorder Act 1998, Anti Social Behaviour Orders (ASBO) and parenting orders. However, the media seem to be giving a lot of attention to delinquent youths and portraying them as monsters and race and gender issues have not adequately been looked in to. There is also a difference of opinions on how the problem can be sol ved. The realist perspective will acknowledge the existence of the problem, while a constructive perspective, will view it as a construction of society. Ethnicity and Social problems Ethnicity generally refers to a group’s attachment to a particular area and sharing a peculiar way of life. Racism is when a group of people are treated differently because of their colour. There have been ethnic and racial problems in our society. The media have played a part in upping ethnic tension in the UK. Race riots have flared in some parts of the UK. There have also been reported increases in race attacks. Our institutions, particularly the police and the media have been branded institutionally racist. People from ethnic minority are more likely to be stopped and searched by the police and they are more likely to be socially, economically and politically excluded, more than white people. They are also more likely to be projected as social problems. The cause of ethnic tension is usually an unfounded fear that diversity is a threat to the dominant group in society. The realist perspective will acknowledge the existence of this problem and will seek an explanation for i t. The constructive perspective will view the issue as a construction by society. Single parents Single parents are a social phenomenon now regarded as a social problem because they are believed to have an impact on our values. They tend to impact directly on society, socially, economically, and ideologically. Single parents become a problem, when they cost the state a lot. A good number of single parents depend on state benefits. Fathers are usually absent, and do not contribute towards the upkeep of the children. The social cost of absent fathers can not be overlooked (Dennis and Erdos, 1993). The government have put in place legislation namely the 1989 Children’s Act and the 1991 Child Support Act to deal with the problem. Conclusion Social problems are hard to solve. They seem to be ingrained in the complex web of unwanted state intervention, reckless forms of individual behaviour and economic factors. Social problems have no commonly accepted forms of definition, but they all have common factors that relate to them. In the problems that I listed above, they are all seen from different perspectives and given different explanations. It depends on who is viewing the problem. The media and the government also contribute to making social problems hard to solve. Some social problems might be downplayed and others blown out of proportion. Some times the intervention of the government and experts may worsen a problem as they tend to look at the problem form their own point of view, without taking the point of view of individual or groups suffering the problems directly in to consideration. Individuals can also make social problems difficult to solve. They may mislead the government by providing incorrect data. Economic factors do play a part. The government might not see some social problems as a top priority for them to solve and thus will not earmark enough funds to tackle the problem. Sometimes, the government may not have the political will to solve certain social problems. Some social problems are interwoven in to our social, political and economic structure, that to solve them, we will need to dismantle our entire structure. Finally, there is no generally accepted way to solve social problems. Some solutions appear easy, while others appear complex, but you can not be certain, that the proffered solution will solve the problem. Bibliography Bilton et al eds (2002) Introduction to Sociology, Fourth Edition, Macmillan, London Dennis, N and Erdos, N (1993) Families without fatherhood, Institute for the study of civil society, London Downes, D Rock, P (1995) Understanding Deviance, Oxford University Press, New-York Fulcher, J Scot, J (2006) Sociology, Third Edition, Oxford University Press, Oxford Levin, J, Innis, K, Carroll, W Bourne, R (2000) Social Problems, causes, consequences, Interventions, Second Edition, Oxford University Press, new-York Maxwell, S and Kenway, P (2001) The Challenge of Ending rural poverty, Oxford University Press, Oxford May, et al eds (2001) Understanding Social problems, Blackwell Publishers, McNeill, P Townley, C (1986) Fundamentals of Sociology, Second Edition, Hutchinson, London Raab, E Selznick (1964), Major Social Problems, Paterson and Company, Evanston, Illinois Rubington, E Weinberg, (1989) The Study of Social Problems, Fourth Edition, Oxford University Press, Oxford Rubington, E and Weinberg, M (1989) The Study of Social Problems, Oxford University Press, New-York Spector, M Kitsuse, J (2000) Constructing Social Problems, Transaction, New-Jersey Pop Art Movement: A Summary Pop Art Movement: A Summary Pop Art: A Reactionary Realism by American art critic Donald Kuspit underscores his view that to the extent that Pop-art was was a realistic movement, it ridiculed expressionism and was politically reactionary due to the fact that it approved? Of art on the status quo? By embracing? And celebrating Images of American mass media and popular culture. (Walker 2009) In attempt to bring art back into American daily life, the Pop-art movement depicted elements of popular culture by using common everyday objects, chiefly advertising and product packaging, television and comic strips. The images are portrayed with a blend of humour, criticism and irony. Through this, the movement ascertained the position of art into everyday and contemporary life. It assisted in decreasing the gap between high art and low art and abolished the distinction between fine art and commercial art methods. The Pop-art movement rebuffed the abstract style because of its cultured? And aristocratic nature. (World Wide Art Resources 2009) It was during the 1980s that there was a renewal of interest in the Pop-art of the well known Andy Warhol and contemporaries, this resurgence of interest was known as neo-Pop. Adapted from its forefathers, contemporary Pop-art consists of a reworked form; a revival of identifiable celebrities and objects from popular culture with icons and symbols of the current times. (Art History Archive n.d.) Contemporary Pop-art lends from the past, maintaining the critical evaluation of Western culture, relationships, values and interactions. It frequently satirises celebrities and candidly embraces ideas that are challenging and controversial. Although the bombardment upon society of Popular culture and advertising has become significantly greater since the Pop-art movement began, I believe that the critiques of Pop-art are not appropriate to the original nor the contemporary Pop-art scene. Pop-artists artists have continually been engaged in a crucial dialogue with mass culture. They are noted for exploiting these increasingly despised images of mass culture in order to facilitate the critical examination of the effects of consumerism on human thought, emotion and creativity and challenging our assumptions about the purpose and identity of art in a world inundated with media images and messages (University of Virginia 2006), as the following examples by contemporary artists will demonstrate. (expand on this?) Jeff Koons is perhaps the most renowned Pop-artist of the current day. He addresses societys fixation with Pop culture and counteracts the division between appearance and reality, surface and depth, and art and commodity (reword more?)Koons forms his art pieces on consumer products and manipulates everyday objects in order to overemphasise mass-produced cultural objects while uncovering the nuances of marketing. In difference to his 1960s forbearers, Koons desire is to remark on societies psychological investment in consumerism and how these consumer products are fabricated to allure. (Art Knowledge News n.d.) Jeff Koons first exhibition was titled Equilibrium, which was displayed in 1985. One of the defining features of this decade was the forceful growth of consumerism. For this exhibition he produced a series of works displaying consumer items in glass cases. In Three Ball Total Equilibrium Tank (Fig 1), three basketballs were suspended in a glass case, surrounded by authentic Nike posters displaying basketball players in positions of power. The posters in the work represent sport as a means to achieve fame and fortune for young working-class Americans. The posters almost exclusive use of black athletes not just as stars, but in roles associated with elevated power and respect is a comment on the traditional social system that in reality refutes this power or respect to a large majority of African-Americans. According to Koons, the suspended basketballs also suggest death and fame, the ultimate states of existence. (Tate Collection n.d.) Koons Made in Heaven (Fig 2) series is a collection of overtly sexually explicit photographs and sculptures featuring the artist in moments of sexual passion and intimacy with his then pornstar wife Cicciolina. The exuberant images were first displayed during the 1990 Venice Biennale, among more conventional forms of expression. The series produced both shock and excitement among audiences, and stirred much controversy in the art world with a scandalous subject matter that pushed the limits of twentieth century censorship. Although pornography has been a widely acknowledged aspect of society, it deemed controversial because it is a form of Popular culture that was and still remains taboo in polite company. Koons is notorious for testing the boundaries of acceptable taste; his intention in Made in Heaven was to critically examine love, romance and sexual desire, involving the viewer by making them a contributor to the artwork, as most pornography necessitates an outside viewer to be c lassified as such. (Christies 2009)The Made in Heaven series was also in part a response to The Expulsion from the Garden of Eden, by the fifteenth century painter Massacio. Koons remarks, In The Expulsion, theres all this guilt and shame that were on Adam and Eves faces, and I wanted to make a body of work that was about guilt and shame and the importance of removing that, so that people could have transcendence over guilt and shame in their own history. (Nance 2010) Made for part of his Banality series, is Michael Jackson and Bubbles (1988) (Fig 3), a six feet long ceramic gilded white and gold statue depicting mega Pop-star Michael Jackson with his pet monkey Bubbles, immortalised as cultic and sacred personalities in an idealised state. Its initially blatantly kitsch appearance gives way to reveal its hyper-realistic approach to evoke the fragility of modern days most eminent star. The situation illustrated in the piece deals with societys idolisation and the ever more bizarre media narrative of Michael Jacksons life. Koons states, It really wasnt so much about Michael Jackson. It was about celebrity status, and about hopes, ideals, hierarchies that are placed on structures which take human form. (Nance 2010) Michael Jackson is the archetype of the glamorous, eccentric tragic and ambivalent and Koons encourages numerous interpretive possibilities. (Astrup Fearnly Museum n.d.) An additional example of a contemporary Pop-artist is American sculptor, Daniel Edwards. His sculptures deal with celebrity and Pop culture in a manner that frequently rouses controversy. The release of his works are usually paired with a press release. (Capla Kesting Fine Art n.d.) While frequently denigrated for his use of celebrity, Edwards artwork are also acknowledged as prophetic and consistent in their capacity for humanising social issues that the media and public have difficulty addressing. Autopsy of Paris Hilton (2007) (Fig 4) was produced as a confrontational and graphic interactive display to communicate to the young the dangers of drink driving. The sculpture is life-sized and depicts Paris Hilton sprawled on a bench with her legs splayed. In one hand she clutches her mobile phone whilst in the other is a glass of wine, in this sculpture she has supposedly died as a result of her drink driving, in which in reality she has been convicted of on numerous occasions. The public are encouraged to remove her innards through a cavity in her abdomen, giving a coroners perspective. Contained within this cavity is also her uterus containing twin dead foetuses, which Edwards says is to bring attention to the teen pregnancy crisis. The sculpture is an attempt to de-glamorise the life of a diva and partier which Hilton is renowned for.(Rayme 2007) The sculpture perhaps also alludes to the cult which is celebrities and their every occurrence and the media and publics unquenchable hunger to get as close as possibly to their idols. Daniel Edwards Monument to Pro-Life: The Birth of Sean Preston (2006) (Fig 5), portrays celebrity Britney Spears in a position of natural birth, whereas in fact she gave birth to her son via c-section and was heavily drugged. The piece created much political debate. According to Edwards it promotes pro-life. At its reveal he called his piece an image of birth and mentioned that it was a new take on the pro-life perspective. He states that pro-lifers generally endorse bloody images of abortion and his aim is to generate debate about a topic that is as he states greater than either pro-life and pro-choice advocates. (Rayme 2007) Japanese artist Masumasa Morimura is a well-known example of appropriating worldwide recognised images taken from mass media and popular culture In my view, there can be no generalisation about the quality, meaning and social significance of works of art, given the discrepancies of aesthetic responses and interpretations. Furthermore, Donald Kuspits view expressed in his article suffers owing to the fact that he assumes that artists should be critics of society rather than witnesses or simply narrators of it. Kuspit is an example of a critic who universalises his personal opinion of Pop-art and delivers his judgement whilst ignoring other responses to Pop. (Walker 2009) Pop art was and still remains one of the most popular styles of art, it was successful in communicating to the general public in a mode in which few art movements did or have since done. (Encyclopedia of World Art n.d.) The reality that Pop-art is effective in generating such a broad range of responses is a tribute to its at first seemingly ambiguous character, a testament that it is more complex and diverse than some critics have accepted, and an indication that it is not as trivial and straightforward as some commentators believe. (Walker 2009)

Role of Organic Geochemistry in Petroleum

Role of Organic Geochemistry in Petroleum A review on role of organic geochemistry in petroleum;  characterization and applications of different basins Harish Chandra Joshi Abstract Petroleum is a mixture dominantly of hydrocarbons with varying proportions of non-hydrocarbon constituents and traces of organometallic compounds. Generally Petroleum has an average composition of 85% carbon, 13% hydrogen, and 2% of sulphur, nitrogen and oxygen. The aim of study is to find out the physicochemical and genetic property of petroleum. In this study biomarkers, age specific biomarker and reservoir geochemistry can be used for the characterization, correlation and/ or reconstruction of the depositional environment as micro and macro fossils used by the geochemist. Keywords: Biomarker, Genetic Characterisation, Kerogen, Geochemical Fossils. Introduction The name geochemistry was first used by the Swiss chemist, Christian Friedrich Schonbein in 1838. Petroleum geochemistry is the application of chemical principles to the study of the origin, migration, accumulation, and alteration of Petroleum (oil and gas) and the use of this knowledge in exploring and recovering Petroleum. Organic chemistry is the branch of chemistry that deals with the distribution and composition of carbon compounds. Geochemistry is the study of the chemical composition of the earth, minerals, ores, rocks and also is the study of the origin of petroleum. The major tasks of geochemistry can be summarized as follows: The study of the relative and absolute abundances of the elements and of the atomic species (isotopes) in the earth. The study of the distribution and migration of individual elements in the various parts of the earth (the hydrosphere, atmosphere and lithosphere etc.), and in mineral and rocks, with the object of discovering their distribution and migration. Exploration companies have used petroleum geochemistry in hydrocarbon exploration. The most and major objective of exploration geochemistry, is to reduce the risk of drilling dry holes. Petroleum geochemistry is based on the organic origin of the oil and gas whereby organic matter obtained from dead plants and animals. Organic matter is converted to hydrocarbons in the subsurface through various major three stages of transformations diagenesis, catagenesis and metagenesis. German scientist Treibs (1936) reveal a relationship between chlorophyll-a in living photosynthetic organisms and porphyrins in Crudes of petroleum. This link provides a strong evidence of organic origin of Petroleum. From the starting of the Precambrian till the Devonian, the unique primary producer of the organic matter were marine phytoplanktons. Since the Devonian an increasing amount of primary production has been contributed by higher terrestrial plants. At present cenario marine phytoplankton and higher terrestrial are estimated to produce about equal amounts of organic carbon. On increases the burial depth, porosity and permeability decrease, and temperature increases. Thus lead to the change a gradual halting of microbial activity and thus eventually called ‘organic diagenesis to a halt. As the temperature rises, thermal reactions become increasingly. This second transformation phase, called catagenesis, during the catagenesis kerogen begins to decompose into smaller, more mobile molecules. In the early stage of catagenesis, kerogens are still relatively large; these are precursors for petroleum and are called â€Å"bitumen†. In the late stages and final transfo rmation stage, called ‘metagenesis’. During metagenesis the principal products consist of smaller gas molecules. Further, kerogens formed from different organic matter, or under different diagenetic conditions, are chemically clear which has a significant effect on hydrocarbon generation. Characterization of crude oil by Analytical Methods Firstly sampling of crude oils is required for their characterization. Oil should be collected as a single- phase sample under pressure conditions as they are in reservoir. Therefore for the geochemical studies, crude oil samples are collected at the well head under atmospheric pressure. Under these conditions light hydrocarbons of crude oils are lost completely or partly. Light hydrocarbon fraction gives the ideas only about the abundance and constituents of the light end of the oil. It is normally observed that the most abundant characteristics hydrocarbons are commonly in the light fraction. For required minimizing the effects of sampling error the crude oil is distilled at 2100C. The heavier fraction is considered the foremost part of the crude oil. It is used to describe the chemical composition of a crude oil and also to compare it with other crude oils. Analytical Techniques in Petroleum Exploration Petroleum system (Demaison, 1994; Hunt, 1996) comprise all those geological elements and processes that are necessary for an oil and gas deposit to occur in nature. These main elements are a petroleum source rock, migration paths, reservoir rocks, seals, traps and the geological approach that design each of them. Such systems involve a genetic relationship between the source rock and the petroleum accumulations, but proof of that relation force a geochemical correlation. organic geochemistry techniques available include surface geochemical prospecting, source rock geochemistry, crude oil geochemistry, natural gas geochemistry, biomarker geochemistry, isotope geochemistry etc. Biomarkers in Petroleum Biological marker or shortened to Biomarkers (Seifert and Moldowan, 1981) are complex molecules derived from once living organisms they are found in sediments and oil and show little change in structure from their parent molecules (Peters Moldowan, 1993 and Hunt, 1996). These compounds are also called as geochemical fossils (Eglinton and Cavin, 1967) because of their origin from living organisms. Such compounds may be derived from terrestrial (mostly plants, marine pelagic (mostly plankton) and marine benthonic (algae, bacteria and other microbes). Biomarkers are generally, microfossils less than 30 nm in diameter and are highly variable in their stereochemistry i.e. the spatial arrangement of atoms and groups in their molecules. The common use of the biomarkers in petroleum exploration may be enumerated as follows: Biomarkers are present in both and oil a source rocks so they provide vital information for the oil-oil and oil-source correlation. Organic matter type (source of organic facies) Depositional environment Extent of thermal maturation Degree of biodegradation Information about the age of the source rock ÃŽ ± and ÃŽ ² Geometry of Biomarkers Steranes obtain from the diagenesis of natural products sterols. Diagenesis converts sterol via chemical dehydration and microbial reduction to a steranes cholestane. Cholestane molecule is drawn in three dimensions as follows. The hydrogen at the 3 position points up above the plane of the molecule and that at the 5 position points down below the plane (Peters and Moldowan 1993) Commonly Used Biomarkers in Petroleum Exploration Normal Alkanes: Normal alkanes are a homologues series of saturated hydrocarbons of general formula CnH2n+2. All linear n-alkanes from C1 to C40 and a few beyond C40 derived from different sources have been identified in crude oils. Iso- and Anteiso-alkanes: Isoalkanes are 2-methyl alkanes and quite a number of these have been observed in crude oils as have been the anteiso-alkanes, the 3-methlyalkanes. Iso and anteiso alkanes are associated with n-alkanes in plant waxes where they comprise a approximate number of carbon atoms (about 25-31) with an odd predominance Figure 1. Showing common biomarkers like paraffins, Iso and ante-isoalkane Acyclic Isoprenoid: These are special type of Iso-alkanes in which one methyl group is attached to every fourth carbon atom in straight. Isoprene (methyl butadiene) is the basic structural unit composed of carbon atoms that is found in all biomarkers. The most common isoprenoids are pristane (C19) and Phytane (C20). Figure 2. Common Isoprenoid biomarkers in petroleum Terpenoids: Terpenoids can be classified based on structural types into diterpenoids and triterpenoids Diterpenoids are categorized into bicyclic and tricyclic diterpenoids. Triterpenoids are grouped into tetra and pentacyclic. The most knowing are pentacyclic and among these are hopanes. Hopanes are pentacyclic triterpenoids comprised of four 6-membered and one 5-membered ring. There is a side chain which can contain upto 8 carbon atoms. Thus the series comprise of C27-C35 hopanes. They are believed to have originated from polyhydroxybacteriohopane. Figure 3. Structures of Common Triterpanes Figure 4. Structures of Common Tricyclic and Tetracyclic Terpanes Steranes: Steroids can be classified as aliphatic and aromatic steroids (mono, di- and tri-aromatic depending on the number of aromatic rings). Steranes are a series of aliphatic steroids. The sterols in all eukaryotic organisms are precursors to the steranes in sediments and petroleum. Like the hopanes, steranes are abundant in sediments, rocks and petroleum, because their precursors (Sterols) are so common in living organisms. Cholesterol has eight asymmetric centers and might be expected to show as many as 28 or 256 stereoisomers. Figure 5. Chemical Structure of various steroids Porphyrins: Porphyrins are characterized by a tetrapyrrolic nucleus proved to be inherited from chlorophyll, the green photosynthetic pigment of plants and animals ,hemin, the red pigment of animal blood. These tetrapyrrolic organometallic compounds reported of the vanadium and nickel in petroleum. The major types of fossil porphyrin are deoxophylloerytrapyrrole (DPEP) and etioporphyrin (ETIO) porphyrin structure. Age specific biomarkers If biomarkers characterise a molecular record of life, they can be used for age determination. Certain age specific biomarkers like Oleanane present in oils derived from late Cretaceous or Younger. C11-C19 Paraffins, Odd carbon number prevalence in oil from many Ordovician sources. 24-n-propylcholestane, High in oils from Ordovician sources.Thus the biomarkers transport to the sources has proved to be of great help in geochemical characterization of the oils/condensates. Reservoir Geochemistry The main aim of reservoir geochemistry is to understand the distribution and origin of the petroleum, water and minerals in the reservoir and account for their possible spatial and compositional variation (Cubitt and England 1995). A better understanding of the fluids in the reservoir conduct to a better understanding in an area and prioritization of exploration thrusts. The principle factors responsible for difference in petroleum composition are the effect of organic facies variations, progressive source rock maturation, migration fractionation, gravity segregation, oil/water contact and non-uniform biodegradation of oil across the field. However these effects have been normalized by using ratios of peaks corresponding to compounds of similar molecular weight in the C10+ region of the chromatogram. The study of reservoir continuity is also the focus of the geochemical characterization to trace the nature and depositional conditions of the source organics, identification of the oil families and thermal maturity of the oils/condensates. When a set of chromatographic peaks has been selected, a variety of techniques are available for grouping of this data. One way is to use a polar plot of selected ratios by a star diagram (polygon plot) by plotting each peak ratio on a different axis of polar plot. Each data point is plotted from the centre of the concentric circles outward. The points are then connected to create a star shaped pattern characteristic of each oil. Applications of geochemical characterisation Biomarker and non-biomarker geochemical parameters are best used together to supply the most authentic geological interpretations to help solve exploration, enlargement, production and environmental problems. Prior to biomarker work, oil and rock samples are properly screened using non biomarker analyses. The strength of biomarker parameters is that they provide more detailed information needed to answer questions about the source rock depositional environment, thermal maturity and the biodegradation of oils than non-biomarker analyses alone. Different depositional environments are characterized by different assemblages of organisms and biomarkers. Commonly accept classes of organisms include bacteria, algae, and higher plants. Biomarker parameters are also an effective means to determine the relative maturity of petroleum through the entire oil-generative window. Conclusion On the basis of above observation major conclusions which have been derived from the whole study are as follows: The presence of complete range of normal alkanes upto nC36 and in some cases upto nC40. The presence of biomarker in oil indicates that oil may be terrestrial or marine. The terrestrial nature of the source is also strongly indicated by the steranes. Reservoir geochemistry of oils has been used to demonstrate the lateral/vertical continuity/compartmentalization. References: Bhandari, A., Prasad, I.V.S.V., Kapoor, P.N., Varshney, Meenu, Madhavan, A.K.S., Pahari, S. and Singh, R.R., 2008. Depositional environment, distribution of source rocks and geochemistry of oil and gases, Krishna-Godavari Basin, Journal of Applied Geochem., Vol. 10 (1) pp 17-31 Bhandari, A., Prasad, I.V.S.V., and Dwivedi, Prabhakar, 2007. Stratigraphic distribution of hydrocarbons in the Sedimentary Basins of India. Symposium in Applied Geochemistry in the evaluation and management of onshore and offshore Geo sources. Journal of Applied Geochemistry, Vol. 9 (1) pp 48-73. Bhatnagar, A.K., Goswami, B.G., Rawat, G.S., Singh, Harvir and Singh, R.R., 2009. Geochemical characterization and reservoir fingerprinting to assess reservoir continuity in oils of Heera and South Heera fields, western offshore basin, India, Petrotech 2009 New Delhi. Cubitt, J.M., England, W.A., 1995. The Geochemistry of Reservoirs. The Geological Society London, pp 321. Demaison, G.J and Huizinga, B.J., 1994. Genetic classification of petroleum systems using three factors: charge, migration and entrapment. In: The Petroleum system – From source to trap (L.B. Morgan and W.G. Dow, eds), American Association of Petroleum Geologists, Tulsa, pp. 73-89. Didyk, B.M., Simoneit, B.R.T.,Brassel, S.C and Eglinton, C., 1978. Organic Geochemical indicators of pale environmental conditions of sedimentation. Nature 272, pp 216-222. Eglinton, G and Calvin, M., 1967. Chemical fossils. Scl. Am. 216, pp 32-43 Hunt, J.M., 1979. Petroleum Geochemistry and Geology. W.H. Freeman, San Francisco, pp 617. Hunt, J.M., 1996. Petroleum Geochemistry and Geology. W.H. Freeman and Company, New York. Pandey, I.P., Joshi, H.C., Tyagi, Ashish Tiwari, Sadhana and Garg, Nitika, 2012. Study of the Parameters and Bio-Markers of Crude oils. Advances in Pure and Applied Chemistry, World Science Publisher, New York, United States, Vol. 1, No. 3, pp 49-53. Mackenzie, A.S., 1984. Application of biological markers in Petroleum Geochemistry, In Advances in Petroleum Geochemistry, Vol. 1, (J. Brooks and D.H. Welte, eds) Academic Press, London, pp 115-214. Mackenzie, A.S., Patience, R.L., Maxwell, J.R., Vandenbroucke, M and Durand B., 1980.Molecular parameters of maturation in the Toarcian shales, Paris Basin, France-1. Change in the configuration of acyclic isoprenoid alkanes, steranes, and terpanes. Geochimicaetcosmochimica Acta, 44, 1709- 1721. Peters, K.E., 1997. Modern Geochemical Tools for efficient exploration and Development, O.G.C.I. Training report, Oct. 20924, Mussoorie, India. Peters, K.E. and Fowler, M.G., 2002. Application of Petroleum Geochemistry to Exploration and reservoir management. Org. Geochem. Vol 33, pp 5-36. Peters, K.E. and Moldowan, J.M., 1993. The biomarker guide interpreting Molecular fossils in petroleum and ancient sediments, Prantice Hall, Englewood Cliffs, NJ., U.S.A. Seifert, W.K. and Moldowan, J.M., 1978. Application of steranes, terpanes and Monoaromatics to the maturation, migration and source of oil. Geochem. Cosmochim., Acta 42, pp 77-95 Seifert, W.K. and Moldown, J.M., 1979. The effect of biodegradation on steranes and Terpanes in crude oil. Geochem. Cosmochim., Acta 43, pp 111-126. Seifert, W.K. and Moldown, J.M., 1980. The effect of thermal stress on source rock quality as Measured by hopane stereochemistry.Physics and chemistry of the earth, 12, pp 229-237. Smith,H.M., 1940. Correlation index to aid in interpretin crude oil analysis. U.S. Bureau of Mines, tech. Paper:610. Tissot, B.P. and welte, D.H., 1978. Pertoleum formation and Occurrence, Springer- Verlag, New York, pp. 699. Tissot, B.P and welte, D.H., 1978. Pertoleum formation and Occurrence, Springer- Verlag, Berlin. 22.Treibs, A., 1963. Chlorophyll and hemin derivatives in organic mineral substances. Angewandte Chemie, 49, pp 682-686. 1

The Good Mother †A Passive Life :: Good Mother

The Good Mother – A Passive Life  Ã‚   "We live in a world...where the decisive deed may invite the holocaust." --John Updike An interesting question that emerges while reading The Good Mother is: Why did Anna let it happen? Of course, this question must be included among many others, most of which elicit ambiguous answers: What really happened? Was there fault to be assigned? If so, who was at fault? What is a good mother? Can a woman be a good lover and a good mother? Where must sexual boundaries be drawn between children and couples in a household? Regardless of what it is, the answer to the question Why did Anna let it happen is that she was rendered almost powerless by her gender, class, and social and family background to do anything but let it happen. She spent her life letting things happen. Anna Dunlap, recently freed from a boring marriage and involved in a sexual awakening with an unconventional man, probably thought of herself as liberated in a very literal way before and during her affair with Leo Cutter. "I had a sense, a drunken irresponsible sense, of being about to begin my life, of moving beyond the claims of my own family, of Brian, into a passionate experiment, a claim on myself." (p. 10) As events played out, however, it became obvious that Anna had not escaped her history and that her "liberation" was just an illusion. Anna grew up in the shadow of her wealthy, domineering grandfather, her emotionally absent father and her cold, achievement-oriented mother. Her mother ran her life, pushing Anna to practice piano in the hopes she would become a professional musician one day. Anna was learning that she was not in control of her life; she was forced to let life (through her mother's ambitions for her) happen to her. When she visited her grandparents' summer home in Maine, Anna witnessed her grandfather's overwhelming dominance and saw her grandmother, mother and aunts engaged in interesting but meaningless (in Anna's view) "women's" conversations. When Anna was fourteen, her mother, realizing Anna was not a musical genius, loosened her grip on her daughter and, in fact, ceased to praise her for anything. As Anna's body changed and she became attractive to boys, she tried to define herself through sex, which she found empty and unsatisfying. Once again, Anna was not in control; she let it happen.

The Features of Durkheims Social Realism Essay -- Sociology Analysis

Durkheim is a highly influential name to remember when thinking of sociology. Durkheim’s mission was to develop sociology so it could be defined and to develop a method on how sociology should be used. Durkheim’s main concern in his career was primarily associated with how societies might preserve their integrity and rationality within modernised society, when things such as shared religious views and ethnic backgrounds are seen as things of the past. In relation to Durkheim’s social realism his concern was with the growing individualism in society. Durkheim argues that we are in an era which is imperfectly moving towards a morality based on individualism as â€Å"Durkheim regarded individualism as a collective representation, a force that would impress itself on human minds regardless of their subjective opinions, as well as the manifestation of the egotistical will†. (Mestrovic 1988: 8). Ultimately Durkheim was a strong believer that it is society that defines the individual rather than the individual shaping society. For this reason we can clearly see why Durkheim was highly concerned with growing individualism in society, within a society which he believes shapes an individual therefore individuals are highly dependent on society. This can be seen in Durkheim’s theory of the division of labour. Durkheim argues that in a primitive society which is a society which is seen as having more morals and was a much better society to live in this is because society is seen as having deteriorated as civilisation has developed and become modernised. The division of labour within a primitive society therefore is to create or maintain a mechanical social solidarity in which there is a common consensus which allows social order to be maintai... ...dividuals living within society. Works Cited Calhoun, C. Et al. (2007) Classical Sociological Theory (2nd edn). Blackwell. Craib, l. (1997) Classical Sociologucal Theory. London:Oxford Univeristy Press Hughes, J. & Martin, P. & Sharrock, W. (1997) Understanding Classical Sociology: Marx, Weber and Durkheim. London: Sage Durkheim, E. (1976) The elementary forms of the religious life. Biddles Ltd Durkheim, E. (1984) The division of labour in society. Great Britain: Macmillan Durkheim, E. (1982) Rules of sociological method. United States of America: Macmillan Bellah, R. & Durkheim, E. (1973) On Morality and Society: selected readings. London: Chicago Press Mestrovic, S. (1988) Emile Durkheim and the reformation of sociology. London: Rowman & Littlefield Publishers Weber, M. (1978) Sections in translation.Cambridge: Cambridge university press

Catholic belief

The story is about the journey of a little boy, Antonio Marez, to manhood as he tries building his person while trying to make sense of the world that he lives in and the people around him. While he was growing up, Antonio, as well as his family, has been learning a lot of life lessons from Ultima. Ultima was known for her supernatural healing powers, magic and wisdom. She has been staying with the Marez family since Antonio was still a little boy. Throughout the story, Ultima has tried to inculcate the lesson of self-sufficiency and independence with regards choices in what to beliefs and morals.Growing up, for Antonio, with his mother and father had been difficult in terms of making decisions and foretelling what the future offers for him. Torn between the choice of being a cowboy or a priest, Antonio often wondered what was in store for him in the future. Antonio’s mother, Maria, who was a devout catholic, wanted Antonio to become a priest. While his father, Gabriel, wanted him to be a cowboy who wanders through the desserts, just as he was when he was still younger. This often led him to wonder what he would grow up to become.As Antonio was growing up, his thoughts were bombarded with several questions about morality, wickedness, and sins that trouble the world. He had several experiences regarding the Catholic ways, his friend’s debunking of the Catholic belief, and the supernatural as he saw in Ultima’s healing powers and other events as such. At one point, Antonio spoke, â€Å"God! Why did Lupito die? Why do you allow the evil of the Trementinas? Why did you allow Narciso to be murdered when he was doing good? . . . A thousand questions pushed through my mind, but the Voice within me did not answer.† These questions he asked during his first communion, and these were the same questions that have been bothering him all along. Through all these confusion, Ultima could only teach him one lesson, and that is his control over his d estiny. Regardless of culture, beliefs and morals of the family, religion, etc. who he is, should be what he wants to become. Ultima shows Antonio and his family that there are no limits or boundaries to a person. What’s more important is how good a person one becomes despite all conflicting encounters or experiences.Ultima always told him to take everything that he has learned, whether it be from the Virgin Mary, the Golden Carp, or the magic of supernatural healing, and make a new and better person out of it. He thought, ‘Take the llano and the river valley, the moon and the sea, God and the golden carp-and make something new,' I said to myself† (Anaya, 247) Antonio has really learned his lesson, as he said, â€Å"I had been afraid of the awful presence of the river, which was the soul of the river, but through her I learned that my spirit shared in the spirit of all things† (Anaya, 15)Antonio remembers everything that Ultima has said to him, and eventual ly these things have shaped him into a morally independent person, capable of making decisions and believing in things on his own. He remembers what Ultima has said to him, â€Å"There are so many dreams to be fulfilled, but Ultima says a man's destiny must unfold itself like a flower, with only the sun and the earth and water making it blossom, and no one else meddling in it-† (Anaya, 223)

Hamlet by William Shakespeare Essay

You make decision everyday; whether it is choosing what you make for breakfast or choosing what you want to be when you grow up. It is natural in humans to make decisions and act on what they believe is to be true. This not only applies to humans, but authors use them in their books or plays to create different types of characters. In one of the greatest works by William Shakespeare’s Hamlet, there are characters that make many different kinds of decisions that determine their role in the book. In the play, the protagonist Hamlet, after his father’s death, is angry about his mother’s hasty marriage to Claudius. He sees a ghost of his father one night and tells him that Claudius had murdered him. Hamlet plans to kill Claudius but he has trouble making decisions and throughout the play, his poor decision making skills bring downfall to himself and many others. Every tragic hero has a tragic flaw and Hamlet’s tragic flaw is his inability to make decisions. Hamlet’s inability to kill Claudius after hearing from the ghost, that he had killed Hamlet Senior, contributes to his stubborn indecisiveness, which brings about his own downfall. His indecisiveness leads to many character’s deaths; such as Rosencrantz, Guildenstern, Laertes, Polonius and his own mother. He had many chances of killing Claudius but he constantly over thinks the situation thus delaying his major task of killing Claudius: To take him in the purging of his soul When he is fit and seasoned for his passage? No. Up, sword, and know thou a more horrid hent. When he is drunk asleep, or in his rage, Or in th’ incestuous pleasure of his bed, At game a-swearing, or about some act That has no relish of salvation in ’t—. Then trip him, that his heels may kick at heaven (III. III. 85) This is an example of Hamlet being indecisive on whether or not to kill Claudius in the Church after the Mouse Trap play. He decides not to kill him there because he is praying and therefore will be forgiven for his sin. This results in delaying of his main task and also made more room for error; such as killing Polonius and also getting sent to England, which leads to Rosencrantz and Guildenstern’s deaths. If Hamlet would have decided to kill him then, he would not have created the mess he ends up making at the end. Hamlet’s inability to talk and discuss to Ophelia about what is happening, after she starts rejecting his messages, leads to losing his love and ultimately ends up to her demise. Even though they were in love, when Ophelia begins rejecting Hamlet’s messages because Polonius told her to, Hamlet tells Ophelia that she was not worth anything to him. This leads her to believing that Hamlet does not love her anymore. As a conclusion, she goes crazy and out of control; for example: By Gis and by Saint Charity,  Alack, and fie, for shame! Young men will do ’t, if they come to ’t. By Cock, they are to blame. Quoth she, â€Å"Before you tumbled me, You promised me to wed. So would I ha’ done, by yonder sun, An thou hadst not come to my bed. (IV. V. 40) This is the scene where she has become insane. She sings about how a man promised her to marry her before they went into bed together but he left her. On top of Hamlet’s rejection, Hamlet has killed her father, Polonius, so she has completely lost control of herself. She sings a very sorrow song in front of many people and also gives out fake flowers to people. After this scene, she ends up committing suicide at the lake. If Hamlet had talked with Ophelia about what was going on and why she was ignoring her messages, she would have not become insane and Hamlet and Ophelia would still be in love. Hamlet’s final flaw is his inability to decide whether life is worth living or not, which contributes to his stubborn indecisiveness, which ultimately leads to his own downfall. Hamlet is very confused about his own life and is out of his mind. He is very depressed from his father’s death and the feeling of betrayal he has from Gertrude, his mother, who remarried right after his father’s death. He does not know if life is worth living or not and this is obvious when he says: To be, or not to be–that is the question: Whether ’tis nobler in the mind to suffer The slings and arrows of outrageous fortune Or to take arms against a sea of troubles And by opposing end them. To die, to sleep– No more–and by a sleep to say we end The heartache, and the thousand natural shocks That flesh is heir to. ‘Tis a consummation Devoutly to be wished. To die, to sleep– To sleep–perchance to dream: ay, there’s the rub, For in that sleep of death what dreams may come When we have shuffled off this mortal coil, Must give us pause. (III. I. 56) This is his famous soliloquy on the topic of life. He compares life and death and he cannot decide whether or not to stay alive or to be dead. He believes that death is the way to escape all his troubles and his depression but then on the other side, he knows he needs to complete the task of killing Claudius. His indecisiveness about his own life delays his action from doing what he really wants to accomplish. Even though Hamlet kills Claudius at the very end, as a result of his indecisive behavior, he has taken way too much time to accomplish one single task. Also, it killed many innocent people he could have prevented from killing them. If Hamlet would have not been so depressed and actually decide whether or not he should stay alive or die, he might have had a better chance accomplishing his tasks much faster and efficient. Clearly, Hamlet is very indecisive all over and his indecisiveness brought about his own downfall. His mother’s death, his love’s death and his friend’s deaths are all caused by Hamlet. If he were to be decisive and straightforward, he could have killed Claudius much faster and he also could have prevented all of the deaths that happened. Many theories attempt to explain why Hamlet takes so long to kill Claudius but out of many theories, Hamlet’s indecisiveness is the only one with full satisfactory answers. Every book or play has a tragic hero and every tragic hero has a tragic flaw and in the play Hamlet, there is no exception. These themes present in many of William Shakespeare’s plays are relevant even today. There are times when we are indecisive when it comes to difficult situations. To be able to decide and to act on what you decided to do is what we try to aim for, however, since Hamlet did not complete this, he led himself to his own downfall and also many other’s to their downfall as well.