Personal Impact Reflection Essay Example | Topics and Well Written Essays - 250 words

Personal Impact Reflection - Essay Example Given that I come from a different culture from the dominant Western culture, this course has influenced how I perceive issues surrounding sex and sexuality and how I may enlighten my society about sex and sexuality. Specifically, the course has offered me an information and knowledge that I can utilize in making connections to my culture’s beliefs, attitudes, and perceptions about human sexuality and gender. Through this course I have gained insights that I could apply in enlightening members from my culture/society in understanding why different genders are perceived differently across cultures, and the effects of such perceptions on issues such as family life, marriage, gender roles, and relationships and intimacy. Additionally, the course has influenced my perceptions towards issues such as underlying physiological, psychological, and social dynamics of Lesbian Gay Bisexual & Transgender people and relationships, and the influence of differences in cultural backgrounds on society’s attitudes towards LGBT people and relationships. Overall, the course has offered valuable insights into how sex and gender issues are interpreted differently across cultures, and why social expectations about issues surrounding human sexuality vary across different cultures and

Crime and Poverty Essay Example | Topics and Well Written Essays - 1000 words

Crime and Poverty - Essay Example Money is often reinvested from the open market to the black one to bring about high yet risky return in urban areas. This kinds od risks are even higher when this activity is controlled by mobs and gangs who make money on the account of others. The children who live in these areas do not have realistic role models, which results in them looking up to those people who get rich through those experiencing poverty. There are some theories that suggest that people are to blame for ending up in poverty themselves. It is true that today’s neighborhoods infested with gangs often invest in their own downfall by earning money through crime. However, the misfortune of America has much to do with the actions in the Civil War. There are speculations among some communities that suggest that slaves were turned loose after the Civil War not having proper education, nor a fair chance to provide for themselves or their families in a legal way. Along with the already lowered perception of these slaves, this caused a long term severance in social and economic standards of equality and education, as well as of opportunities. Many politicians through history tried to solve the problems of poverty, but nothing this serious and of this magnitude can be solved overnight. It may take a long time to improve means of wealth distribution and a society-wide commitment to solving this problem of poverty as well as the crime, but it is worth every minute spent. â€Å"It has been said that a civilized society is best measured by how it treats the poor. If such is the case, we Americans are abject failures. Nationwide over 20% of our children live in poverty. In Los Angeles 30% of all children are poor.†(Carl C. Holmes) These impoverished children are 2.7 times more likely to suffer stunted growth, and twice as likely is the chance for them to suffer serious physical or mental disabilities. Poor children score much lower on achievement tests and the level of illiteracy among the p oor is too large and disgraceful. If we could call poverty a disease, we could say that it is a most devastating disease that people can suffer. The poor do not suffer just economically, but also suffer lack of opportunity, education, health care, as well as much more violence, disease rates and imprisonment at much higher rates than those who are in better conditions in the community. They are often executed for capital crimes for which regular people wouldn’t be executed. It was thought of poverty to be the most noticeable cause of crime. However, this had an influence on many people to decide to form voluntary associations to help the poor and prevent them from committing a crime and ending up in prison. The way they saw it was that the poor need what others have and to get those things they turn to crime. This connection seems solid on the surface, but more closely, it is not the best perspective for viewing this situation. Certain voluntary organizations have the effect on a large portion of the battle between crime and poverty. These organizations had a goal to see that the criminals were treated fairly and to prevent crime by cutting it in the bud. They also try to help reform free convicts and by doing that also to improve the society. One of these associations was the Prison Discipline Society whose goal it was to ensure that the prisoners were treated fairly and kept in livable conditions. The theory which suggests that crime

Examining Enhanced Oil Recovery (EOR) Techniques

Examining Enhanced Oil Recovery (EOR) Techniques Enhanced Oil Recovery (EOR) is a generic term for techniques used for increasing the amount of crude oil that can be extracted from an oil well. Using EOR, 30-60 % of the reservoir original oil can be extracted compared with 20-40% using primary and secondary recovery techniques. Enhanced oil recovery is also called improved oil recovery or tertiary recovery. This improved extraction is achieved by gas injection, chemical injection and thermal recovery (which includes cyclic stream, stream flooding, and fire flooding). Gas injection is the most commonly used EOR technique; here gas such as carbon dioxide (CO2), natural gas, or nitrogen is injected into the reservoir whereupon it expands and thereby pushes additional oil to a production wellbore, and moreover dissolves in the oil to lower its viscosity and improve the flow rate of the oil. Oil displacement by carbon dioxide injection relies on the phase behaviour of carbon dioxide and crude oil mixture that are strongly dependent on reservoir temperature, pressure and crude oil composition. These mechanisms range from oil swelling and viscosity reduction for injection of immiscible fluids (at low pressure) to completely miscible displacement in high pressure applications. In these applications, more than half and up to two-third of the injected carbon dioxide returns with the produced oil and is usually re-injected into the reservoir to minimize operating cost. The remainder is trapped in the oil reservoir by various means. Other techniques include thermal recovery (which uses heat to improve flow rate) and, more rarely, chemical injection, where polymers are injected to increase the effectiveness of water floods or the use of detergent-like surfactants such as to help lower the capillary pressure that often prevents oil droplets from moving through a reservoir. Surfactant enhanced water floods are used for oil recovery where surfactants are injected with polymer. Microbial Enhanced oil Recovery (MEOR) is particularly suited for application in carbonate reservoir, after secondary oil recovery, there are still large amount of oil left in the reservoir. Some bacteria are able to increase the oil production when injected into the oil reservoir. To stimulate such anaerobic microbial increased oil recovery, nutrients is injected together with the injection water. Oil recovery requires two to three stages which are briefly described below Stage 1: Primary Recovery 12 15 % of the oil in the well is recovered without the need to introduce other substances into the well. Stage 2: Secondary Recovery The oil well is flooded with water or other substances to obtain an additional 15-20% more oil from the well. Stage 3: Tertiary Recovery This stage may be accomplished through several methods which includes MEOR to additionally recover up to 11% more oil from the well. Layout for different recovery techniques are shown in figure 1. Primary and secondary recovery techniques are usually called conventional recovery. Primary recovery is done by natural flow which is usually enhanced by reservoir natural pressure, and artificial lift such as pumps and gas lift, etc. Secondary recovery is done by water folding and pressure maintenance by gas reinjection. Tertiary recovery techniques cover broad area which includes thermal recovery such as in-situ combustion and steam flooding, solvent recovery is done by methods such as polymer flooding and surfactant enhanced water flood. Chemical enhanced recovery methods include gas injection or hydrocarbon miscible injection and nitrogen and flue gas flooding. Microbial enhanced oil recovery which is the main focus of this project will be explained better in the next chapter, but it is basically injection of microbes such as bacteria into oil reservoir to help recover oil. All these methods of oil recovery will be e xplained briefly. PRIMARY RECOVERY If the underground pressure in the oil reservoir is sufficient, then this pressure will force the oil out to the surface of the earth. Gaseous fuel, natural gas or water is usually present, which also supply needed underground pressure. In this situation, it is sufficient to place a complex arrangement of valves (Christmas tree) on the well head to connect the well to a pipeline network for storage and processing. Normally oil is recovered by natural means and artificial lift like pumps and gas lift. SECONDARY RECOVERY Over a lifetime of an oil well, the pressure will fall and at some point there will be insufficient underground pressure to force the oil to the surface of the earth. If economical, as often is, more oil in the well is extracted using secondary recovery methods. Secondary oil recovery uses various techniques to aid in recovering oil from depleted or low pressure reservoir. Sometimes, pumps such as beam pumps and electric submersible pumps (ESPs) are used to pump the oil to the surface of the earth. Other secondary recovery techniques increases the reservoirs pressure by water injection, natural gas reinjection and gas lift, which inject air, carbon dioxide or some other gases into the reservoir. Together, primary and secondary recovery generally allows 25-35 % of the reservoir oil to be recovered. Water injection The productivity of existing oil wells can be significantly increased by the use of water injection. Statistics has shown that a reservoir produces just 37% oil in the first recovery. By using water injection, a reservoir can produce more than 50% of its oil. One of the most important issues during oil production is to keep the matrix/formation as clean as possible to maintain maximum oil production. Water is injected for two reasons: first is for pressure support of the reservoir. Second is to sweep or displace the oil from the reservoir, and push it outward. Gas lift Gas lift is one of a number of processes used to artificially lift oil from a well, where there is insufficient reservoir pressure. The process involves injecting gas through the tube-casing annulus. Injected gases aerate the fluid and reduce its density so the formation pressure is then able to lift the oil column and forces the fluid out of the wellbore. Gas may be injected continuously or intermittently, depending on the producing characteristics of the well and the arrangement of the gas-lift equipment. Although the gas is recovered from the oil at a latter separation stage, the process requires energy to drive a compressor in order to raise the pressure of the gas to a level where it can be reinjected. TERTIARY RECOVERY Tertiary recovery reduces the oil viscosity to increase oil production. Thermally enhanced oil recovery methods (TEOR) are tertiary recovery techniques that heat the oil and make it easier to flow or extract. Steam injection is the most common form of TEOR, and is often done with a cogeneration plant. In this type of cogeneration plant, a gas turbine is used to generate electricity and the waste heat is used to produce steam, which is then injected into the reservoir. In-situ burning is another form of TEOR, but instead of steam, some of the oil is burnt to heat the surrounding oil. Occasionally, detergents are also used to decrease oil viscosity as a tertiary oil recovery method, another method to reduce viscosity is carbon dioxide flooding. Tertiary recovery begins when secondary oil recovery isnt enough to continue adequate production, but only when the oil can still be extracted profitably. (Hitzman 1983) Gas injection or Hydrocarbon Miscible injection Gas injection is the most commonly used EOR technique, here, gas such as carbon dioxide is injected into the reservoir whereupon it expands and thereby pushes additional oil to a production wellbore, and moreover dissolves in the oil to lower its viscosity and improves the flow rate of the oil. Oil displacement by carbon dioxide injection relies on the phase behaviour of carbon dioxide and crude oil mixture that are strongly dependent on reservoir temperature, pressure and crude oil composition. These mechanisms range from oil swelling and viscosity reduction for injection of immiscible fluid (at low pressure) to completely miscible displacement in high pressure applications. In these applications, more than half and up to two-third of the injected carbon dioxide returns with the produced oil and is usually reinjected into the reservoir by various means. Nitrogen and gas flooding Nitrogen and flue gas about 87 % nitrogen and 12 % carbon dioxide is used in place of hydrocarbon gases because of economical reasons. Nitrogen competes with carbon dioxide because it is economical and its compressibility is much lower. For a given quantity at standard condition nitrogen will occupy much more space at reservoir pressure than carbon dioxide and methane at the same condition. Nitrogen has a poor solubility and lower viscosity in oil and requires much higher pressure to create miscibility. THERMAL RECOVERY In-situ combustion Fire flooding is world cheapest means of thermal recovery, however, significant amount of amount of fuel must be burned, both above the ground to compress the air, and below ground in the combustion process. Actually the worst part of the crude oil is burnt, the lighter end are carried forward in advance of the burning zone to upgrade the crude oil. Stream flooding In the steam drive, steam Is continually introduced in the injection well to reduce the viscosity of the oil and provide a driving force to move oil towards the production well. Steam driving may work by driving water and oil to form an oil bank in front of steamed zone. Ideally this steam bank remains n front, increasing in size until it is produced by the well offsetting the injector. However, in many cases the steam flows over the oil and transfer heat by conduction. Oil at the interface will then be less viscous and dragged along with the steam to the producing well. Recoverability is increased because the steam lowers the oil viscosity and improves the oil mobility. The more mobile oil displace the steam zone expands vertically, and the steam oil interface is maintained. Chemical injection Other techniques which uses heat to improve flow rates (and more rarely) is chemical injection, where polymers are injected to increase the effectiveness of water floods, or the use of detergent like surfactants to help lower the capillary pressure that often prevents oil droplets from moving through a reservoir. Alkaline flooding is an effective chemical EOR method. SOLVENT RECOVERY Polymer flooding Both synthetic polymer such as polyacrylamides and natural polymers are used for improvement of sweep efficiency. Additional polymer makes the water more viscous so that oil is produced faster. Obviously, this is not a good idea n a low permeability reservoir or one with high clay content that absorb the polymer. However, polymer-augmented water floods can be profitable Surfactant-Enhanced Water flood Three types of chemical floods exist. The first is an alkaline-augmented polymer flood. Another is an alkaline-surfactant polymer flood. The third is a micellar or low interface tension flood (Donaldson, 1989). AIM AND OBJECTIVES The aim of this project is to study the adaptability of anaerobic bacteria (Clostridium Thyrobutyricum 633) to different salinities and check the effect of the microbial strain on permeability of the Danish Nord Sea Chalk. To achieve this aim, the following objectives have been set: Check adaptability of microbial strain to high salinities Microbial gas production and dynamics of metabolism Carry out plate count experiment Observation of fermentation process and microbial analysis To determine and measure the volume of carbon dioxide gas produced by these microbes when exposed to different salinities To determine the amount of acid produced during fermentation process Statistical analysis of results to derive model Improvement of experimental procedure The project work is based on studying of the microbial enhanced oil recovery method and the possibilities of using this in the Danish sector of the Nord Sea. The project task applies experimental procedure and the specific to investigate if these microbes can survive under reservoir conditions and produce products important in oil recovery. CHAPTER TWO:Â  LITERATURE REVIEW MICROBIAL ENHANCED OIL RECOVERY (MEOR) MEOR is used in the third phase of oil recovery from a well, it is a tertiary oil recovery technique. MEOR is the use of micro-organisms to retrieve additional oil from an existing well, thereby enhancing the petroleum production of an oil reservoir. In this technique, selected natural micro-organisms are introduced into oil well to produce harmless by-products like carbon dioxide. These process help to mobilize the oil and facilitate oil flow by reducing the viscosity of the oil and making the rock permeable, thereby allowing more amount of oil to be recovered from a well. Amongst the available tertiary oil recovery techniques, MEOR is arguably the best for many reasons. One key factor in the selection of microbial enhanced oil recovery is the economical potential, by which desirable chemicals and gases are produced to enhance oil recovery. MEOR processes are also energy efficient and environmental friendly as compared to other recovery techniques. History of microbes used MEOR is a technology that has a history based on over 60 years of research and field studies. The earlier works by ZoBell CE and Updegraff D (USA), Kuznetsov SI and Shturn DL (USSR), shows the international scope of the work. This work was expanded in the 1950s mainly by investigators Coty VF, Yarborough H and Hitzman DO in the major oil companies in the United States. In MEOR, the process that facilitates oil production is complex and may involve multiple biochemical processes. Microbial biomass or biopolymers may plug high permeability zones and lead to a redirection of water flood, produce surfactants which lead to increased mobilization of residual oil, increase gas pressure by the production of carbon dioxide or reduce the oil viscosity due to digestion of large molecules. Application of MEOR technologies MEOR technologies have the common basis of introducing or stimulating viable micro organisms in an oil well reservoir for the purpose of enhancing oil recovery. However, this broad generic definition of MEOR is not a single methodology but is a broader technology which can be designed for different and selective applications. It is convenient to divide the MEOR technology into the following application groups: Single well stimulation MEOR water floods Paraffins removal Viscosity modification Water diversion Heavy oil modification The classification of MEOR technology by the proposed oil releasing mechanism shows the range of microbial effects which can be identified or expected to occur to which the MEOR system can be directed. MEOR Oil Releasing Mechanism Gas generation: The production of gases will aid the displacement of oil in the pore spaces. Acid production: Organic and inorganic acid production by microbes will dissolve carbonate deposits, iron sulphide and dissolution and sulphate materials. Surfactant production: Biosurfactants produced by the organisms result in the reduction of interfacial surface tension of the oil/water bond. Other MEOR oil releasing mechanisms includes: Physical oil displacement Biopolymer production Hydrocarbon modification Viscosity modification Selective plugging of high permeability zones within a reservoir is necessary to achieve oil recovery. This is best achieved in MEOR process where cells stimulated to grow deeply in a formation where production of biomass and products will have the greatest impact. If growth occurs primarily at the well bore, then face plugging will result, and no additional oil will be recovered, leaving the reservoir unproductive. The Science of MEOR The micro organisms used in MEOR can be applied to a single oil well or to an entire oil reservoir. They need certain conditions to survive, so nutrients are often introduced into the well certain intervals. MEOR also requires that water be present. Micro organisms grow between the oil and the wells rock surface to enhance oil recovery by the following methods: Reduction of oil viscosity: Oil is a thick fluid that is quite viscous, meaning that it does not flow easily. Micro organisms help break down the molecular structure of crude oil, making it less viscous and easier to recover from the well. Production of carbon dioxide gas: As a by-product of metabolism, micro organisms produce carbon dioxide gas. Over time, these gases accumulate and displace the oil in the well, driving it up and out of the ground. Production of biomass: When micro organisms metabolize the nutrient they need for survival, they produce organic biomass as a by-product. This biomass accumulates between the oil and the rock surface, physically displacing the oil and making it easier to recover from the well. Selective plugging: Some micro organisms secrete slimy substances called exopolysaccharides to protect themselves from drying out or falling prey to other organisms. The substance helps bacteria plug the pores found in the rocks within the well so that oil may move past rock surfaces more easily. Blocking rock pores to facilitate the movement of oil is known as selective plugging. Production of bio surfactants: Micro organisms produce slippery substances called surfactants as they breakdown il. Because they are naturally produced by biological micro organisms, they are referred to as bio surfactants. Bio surfactants act like slippery detergents, helping the oil move more freely away from rock and crevices so that it may travel more easily out of the well. If we make a comparison between MEOR and other enhanced oil recovery, then we can see that MEOR is much adoptable, it offers multiple recovery mechanisms, low capital and operating cost, while in other enhanced oil recovery techniques, only a specified technology is applicable also has a high capital and operating cost. TYPES OF MICROBES AND THEIR SELECTION MEOR has gained much attention in recent times, but it is worth noting that not all microbes can survive in such conditions as found in an oil well, therefore the microbes which are able to withstand these conditions are discussed below: Microbes used in MEOR There are many types of bacteria used in MEOR, they include aerobic and anaerobic bacteria and are divided on the basis of their need for oxygen. In this project work, the bacteria used were anaerobic from CHP-biogas plant at Ribe in Denmark. Selection of Bacteria The selection of specific bacteria is considered in this method. There are a lot of bacteria available, but the normal conditions for majority of bacteria is 5 % Sodium chloride, optimum temperature of 37 degree Celsius, pH less than seven. Factors affecting growth of bacteria There are many factors which affects the growth of bacteria. Some of which are explained in the below: Salinity: The term salinity refers to the amount of dissolved salt that are present in water. Sodium chloride is the predominant ions in sea water, the concentration of magnesium, calcium and sulphate ions are also substantial. High salinity and toxic substances are responsible for limiting the growth of microbes. Halophiles are salt loving microbes which use sodium chloride and also have complex nutrient requirements. Moderate halophiles can grow anaerobically at temperature greater than 50o C. The salinity in the northern part of Danish oil field is about 40g/l or more. Since salinity too high, formation water is diluted with sea water during injection in the well. In order to perform experimental and laboratory analysis, a sample of produce water is taken so as to know how much salinity can be controlled; therefore microbial gas production has been tested up to 140g/l. Temperature: Extreme high temperature affects the growth of bacteria, although they need average temperature for growth. Thermopiles are bacteria which are heat loving; these bacteria have an optimum growth temperature of 45 o C 80 o C. Their membranes are unusually stable at this extremely high temperature. Thus many important biotechnological processes utilise thermophilic enzymes because of their ability to withstand intense heat. So before injecting these bacteria into the reservoir, the temperature of the reservoir should be considered, therefore, selection of the right thermophilic bacteria for high temperature is very important. Effect of pH: pH is the measure of acidity or alkalinity of a solution. Simply pH is the measure of concentration of hydrogen ions in a solution. It is a measure of the activity of dissolved hydrogen ion. In pure water at 25 o C, the concentration of hydrogen ion equals the concentration of hydroxide ions; this is known as neutral and corresponds to a pH level of 7.0. Solutions in which the concentration of hydrogen ions exceeds that of hydroxyl ion has a pH level lower than 7.0 and are known ad bases. The pH reading of a solution is usually obtained by comparing unknown solution to those of known pH, and there are several ways to do so. More favourable pH condition for micro organisms is about 7 and very few of them can grow below2 and above 10. Micro organisms capable of living at very low pH are called acidphilies and those which live at high pH are called alkaliphiles. Pressure: Extreme pressure affects the growth and metabolism of micro organisms. A pressure lower than 100-200 atm has no effect on microbial metabolism, however, pressure of the range of 500-600 atm have limiting effect on growth of bacteria. The ocean floor possesses high pressure. For most MEOR processes barophilic organisms will not be necessary, instead, barotolerant microbes can grow at high pressures, but do not require these high pressures for optimal growth. The ability to grow pressure depends on the energy sources available, inorganic salts present, pH and temperature. Adaptation of microbial cultures to higher pressure therefore is possible. Toxic elements: Chemicals which have toxic effects on micro organisms are found in some reservoirs. These chemicals include co-surfactant, surfactant, biocides, ethylenediaminetetraacetate, and toluene, many of which are used in various chemical EOR operations. Sodium and Potassium may be exchanged without impairing the growth of micro organisms. Magnesium has higher toxicity than sodium and potassium, but the most toxic formation water are those with high Calcium Chloride (CaCl2), so adaptability should be considered before injecting micro organisms in such toxic environment. The choice of Clostridium Tyrobutiricum Thousands of bacteria have been investigated for MEOR purpose, but the fermentation bacteria remain the most popular especially Clostridia specie because they produce large volume of gas which include CO2, H2 and CH4. These gases produced, decrease the oil viscosity and increase the pressure in the oil reservoir. Fermentation Fermentation is the process that produces alcoholic beverages or acidic dairy products. In general, fermentation involves the breaking down of complex organic substances into simpler ones. Waste products formed in this way include gases, ethyl alcohol, butyl alcohol, organic acids, acetone and others. Molasses fermentation generates energy rich metabolic product, which may react in the final decomposition line of sulphate reduction under anaerobic formation condition. With sulphate ion in the formation water, sulphur reduction predominates. Hydrogen sulphide produced is actually not desirable. The organic acids are formed through fermentation of the molasses by the bacteria in the reservoir do cause a rock dissolving process. Dorben field (Germany), 1982, Dr. Wagner Another reason for using fermentation bacteria is Dr. Wagner field trail. If we make comparison between Danish north oil field formation and Zechstein evaporates rocks which are similar to the Danish North Sea formation. Dolomite is also similar to Danish north field chalk. Formation temperature is quite similar and of course has a high salinity. Clostridia tyrobutiricum was selected for Dr. Wagners experiment. The characteristics of Dr. Wagners experiment field are as follows: Dolomite of Zechstein formations Depth of 1240m Formation temperature 53 oC High salinity formation water, even the fissures and fractures are partially filled with salt. The result of Dr. Wagners MEOR well experiments: Water cut decreased from 80 to 60 % Average annual oil production: Before microbial treatment 50 tons per month 3 months after injection 150 tons per month 1 year after injection 300 tons per month Since all these conditions are similar to Danish North Sea formation and other factors are also same, so we can use fermentation bacteria for MEOR experiment. Adaptation of bacteria to high salinities Majority of the bacteria cannot withstand high salinity, from the time of ancient civilization; it is known that adding 50 g/l of salt in food preserves it from spoiling. This means that fermentation bacteria which normally populate organic substances has a challenge of adaptation in high salinity. The spore forming bacteria like clostridium form spores in extreme conditions. These conditions allow bacteria to survive but they will not be active and would not be productive. Under extremely high salinities, bacteria undergo osmotic stress which is expressed in osmotic pressure. Osmotic pressure affects the water activity and production of CO2 gas during the fermentation process. Osmosis Osmosis is the passage of water from region of high concentration through a semi-permeable membrane to a region of lower water concentration. Semi permeable membrane are very thin layers of material (cell membrane are semi-permeable) which allow some substances to pass through them and prevent other substances from passing through. Cell membranes will allow small molecules like oxygen, water, CO2, ammonia, glucose, amino acid, etc. to pass through; meanwhile, cell membranes do not allow passage of larger molecules like sucrose, starch, protein, etc. Osmotic pressure Osmotic pressure is hydrostatic pressure produced by a difference in concentration between solutions on the two sides of a surface such as a semi permeable membrane. It was also observed that the bacteria change its morphology. For the case of clostridia it will mean that from rod-shape it turns to cocci-form which is simply the reflection of shrinkage. Potential osmotic pressure Potential osmotic pressure is the maximum osmotic pressure that could develop in a solution if it were separated from distilled water by a selectively permeable membrane. It is the number of solute particle in a unit volume of the solution that directly determines its potential osmotic pressure. Osmotic properties of cells The wall of bacteria and growing plant cells are not completely rigid, and the turgor pressure has been proposed to provide the mechanical force for the expansion of the cell walls during cell growth. The uptake or biosynthesis of osmotically active solutes causes an increase in the cells, thus providing the necessary tugor pressure for expansion of the cell walls. Although the suggestion that turgor pressure is the driving force for cell wall expansion would imply that the mechanisms that regulate the osmotic balance of organisms are central to the very process of cell growth. Lipid membranes allow rapid diffusion of water molecules into or out of cells while presenting an effective barrier to most other biological molecules. Membranes that exhibit selective permeability for different substances are called semi permeable, and the osmotic properties of cells derive from this property of the membranes. Thermophyllic and Halophyllic bacteria There are bacteria which need high salinities and high temperatures for their growth. In order to investigate and record the conditions of microbes at high salinities and high temperature it is better to know about the bacteria which can withstand on these conditions. Important information has been given about these type of bacteria is discussed below. A thermopile is an extremophile organism which survives at relatively high temperatures. Thermophilic (heat-loving) organisms are organism with an optimum growth temperature of 50o C or more, a maximum of up to 70

Comparing Dreams in Catcher in the Rye, Night, and Their Eyes Were Watc

Dreams in Catcher in the Rye, Night, and Their Eyes Were Watching God   Ã‚  Ã‚   Throughout the novels Catcher in the Rye, Night, and Their Eyes Were Watching God, the main characters seem to have a dream. In their stories, Holden, Elie, and Janie tell the reader whether or not their dream was successful.    In Catcher in the Rye, Holden's dream is to be the catcher in the rye, meaning he wants to stop children or anything that may still be innocent from falling over the edge. This basically means he wants to preserve the innocence. That's why he likes Phoebe so much, because she's still young and youthful, and most importantly innocent.      Ã‚  Ã‚   The novel charts Holden's experiences over a long period of time. It starts on a Saturday in December just before school closes for Christmas break. He has been informed of his expulsion from Pencey Prep School. What worries him most about being kicked out of school is his parents' reaction, for he has already been expelled from other educational institutions. Soon, Holden decides to go to New York. Holden encounters a large number of people as he travels the city of New York and goes into nightclubs.    Holden looks for some amount of understanding and acceptance from all the characters he encounters, even taxi drivers, but he is denied his needs. As a result, Holden feels dislocated, as though he does not belong anywhere, and he is right. It becomes obvious through his meetings that he is in an entirely different path than the rest of the world. Each time Holden opens up himself, he is rewarded with rejection, until he is finally driven to almost a schizophrenic condition. With his mental health deteriorating, Holden returns to his parents' home,... ...cts herself by firing a rifle at him. She is then tried for his murder.      Ã‚  Ã‚  Ã‚   In spite of the tragic circumstances and the hurricane and Tea Cake's death, the novel has a happy ending, for Janie is found innocent of murder and given a chance to run her life and find out who she really is. In telling her tale, it is obvious that she feels like a satisfied woman who has recognized love and has precious memories to surround her.  Ã‚  Ã‚  Ã‚   If Janie's soul were to come out and see life, it would, unlike the others, be very pleased to see that her hearts desires were fulfilled.    Those were the dreams of Holden Caulfield, Elie Wiesel, and Janie Crawford-Woods.    Sources Hurston, Zora Neale. Their Eyes Were Watching God. New York: Harper & Row, 1937. Salinger, J.D. The Catcher In The Rye. Boston: Little, Brown and Company, 1951.   

Explain what Plato meant by the Form of the Good Essay

Plato was an Ancient Greek philosopher whose writings and theories have greatly influenced the development of Western philosophy. Perhaps his most famous theory is that of the Forms – pure ideas or concepts of what a THING is. It was Plato’s belief that as well as this world, the material world – or the world of Appearances, as he called it – there exists another dimension, where the true Forms of everything in the material world reside; Reality, or the realm of the Forms. A Form, by Plato’s reckoning, is eternal, perfect and unchanging, unlike the images or shadows of Forms that we see in the world of Appearances. In the material world, nothing is perfect, everything changes and eventually everything dies. However, Plato was a dualist, so he believed that as well as our mortal body we also have an immortal soul which existed before and will exist after our time in this world of appearances. The place where our souls resided before we were born and will return to when we die is the realm of the Forms. This, according to Plato explains why we have an innate (though dim) recollection of what Forms are, and why we can recognize things like beauty and justice without being taught. Plato believed that the true philosopher was the one who knew about the Forms and was trying to appreciate and understand the Form of the Good. The Form of the Good is the highest in Plato’s hierarchy of Forms, the highest reality. It is the source and the unity of all the other Forms, and illuminates them so that if one has understanding of the Form of the Good, they have understanding of all the Forms. In Plato’s analogy of the Cave, the Good is represented by the Sun, which is the source of all the objects that the escaped prisoner finds above ground. The Sun makes all the things above ground visible, just like the Form of the Good makes all the other Forms understandable. The Analogy of the Sun by Plato tells us more about the Form of the Good. Plato believed that sight was the â€Å"most noble† of the five senses, because the other four require only two things, a sensor and a sensed (eg. an ear and a sound, a nose and a smell). Sight, however, requires three: an eye, a thing to be seen and the sun to provide light and make it possible for the eye to see it. Plato likens sight to reason; reason requires somebody to understand/to be enlightened, a thing to understand, and the Good to make it possible to understand it. The Form of the Good cannot ever be wholly present in the world of Appearances; however it can, like the other Forms, be reflected in a variety of ways. This, Plato argues, is the reason why we can call so many different things â€Å"good† – because they all correspond to the true reality of goodness at least in part. A cake can be called â€Å"good† if it satisfies someone’s hunger and pleases their taste buds; a chair can be called â€Å"good† if it is comfortable and doesn’t break when you sit on it; a person can be called â€Å"good† if they are kind to others, or if they volunteer in developing countries. But the Form of Good is all of these things, and more than all of these things, says Plato, and because all the Forms come from the Form of Good, every time Truth or Beauty or Justice is reflected in the world of Appearances, Good is being reflected too. Some people think that Plato’s theory of the Form of the Good doesn’t work, because, they argue, around the world and through the ages there are different concepts and understandings of what it means to be good or what a good thing is, so there cannot possibly be a perfect singular Good to which all these different actions and people agree with. These people are known as moral relativists and they do not believe there is absolute morality, rather one must decide what is right and wrong from the particular situation they are in. For example, in some cultures, it is never a good thing to take a life, even if that person has done terrible things including taking lives themselves. However, in other cultures, if the person has done terrible things society will agree that they should be executed for the good of the rest of society and to protect them from future crimes that the person could commit in the future. Plato was a moral absolutist, someone who does believe in a total, unchanging good. Moral absolutists would argue that just because not every culture recognizes the true goodness for what it is, that doesn’t make it any less good.

TMM Brain Storming

Find out In the beginning of the class If the students had done any prior preparations to learn that lesson and encourage such students. 3. Help the students make a smooth transition from +2 Make the students aware that the study pattern Is entirely to (NSA) 4. Different from what they were following in the last 12 years. They should be mentally prepared to adopt a new teaching style and learning process. 5. When students get good results, they must receive some positive strokes and visible appreciation. Increase the Library hours so that students get more time for REAL research . Tidies. Check if they are using it properly. 7. Allocate specific time in the time table for student- teacher interaction on a one to one basis. 8. Encourage and educate students to respect all faculties whether they teach them or not. 9. Do not criticize students in public unless there is a sufficient reason. 10. Do not do anything which would bring down the self esteem and morale of the students. 11. Best teachers (Communicators) should be allocated for the first years. 12. Teachers need to pay undivided attention Just for academic matters. Unfortunately today they re involved in several extracurricular activities like collection of fees, uniforms, dress, sandals, collection of records from the press, taking quotations etc. 13. Curriculum meeting should be conducted every month on a FIXED date in a PROPER manner so that the coordinators are fully equipped. 14. In the clinical, teachers must be given a control over the students than the staff nurse. In the present scenario, staff nurses enforce their work on our students. 15. Special meeting with the parents of weaker students must be conducted more frequently.Change the teaching method – student friendly. Make sure they understand the topic properly. 16. Increase interaction with the students- use Sacramental method of using more questions and make them think. Plan Discussion classes Instead of lecturing classes. 17. Prepare power point presentations In a professional manner. 18. Prepare proper lesson plan and get approval from the concerned person. 19. Assign an Internal faculty to assist or follow up the external faculty. 20. All the faculty should be given training In modern techniques of communication. 21. Equip the students to WRITE the exam properly.Some students write the correct answers, but give wrong embers, and then they wont get marks. They make a lot of such mistakes. They should be given proper orientation before they go for the exams. 22. Class co teach a subject or not. Then they can build up a close knit relationship and maintain it all the time. When the students face with a problem, then it is easy for them to approach that person. This is the time, these students face a lot of psychological, behavioral, hormonal issues and they badly need a mentor and a counselor whom they can trust completely. 23.Plan the curriculum for each year at least two months n advance so that teachers will k now their responsibilities properly. Short notice planning is creating a lot of tensions and problems. Once you plan it, go strict about implementing it. Do not change it as your mood changes. It creates problem for those who are forced to implement it. 24. Faculty should develop a culture of completing their works in the stipulated time. It should not be postponed or kept pending. 25. Find out the weak students in the first quarter itself and plan some special activities for them. Give them more study time if needed, avoiding clinical once in a while. 6. Conduct minimum of three PTA meeting every year. 27. Students who have not cleared I and II year exams should be withheld from Ill year classes and clinical. (Parents to be convinced). 28. There should not be any discrimination between B. Sc and M. Sc faculty. A We Feeling should be created. Conduct all – staff meeting every month. 29. Academic programs should not be interfered by Conferences or Workshops. 30. Disciplinary a ctions should be made without any delay. 31. Students should not be overburdened with extra money collection in various heads. 32. One staff: 10 students family should be created.There should be a mix of brighter as well as weaker students in the group. They should help each other in all matters. There can be even a healthy competition between the groups. Brighter students should help weaker ones to go up the ladder. In the hostel, 5 adjacent rooms can be provided for them. 33. Students must be given opportunities to get engaged in non curricular as well as entertainment programs once in a while. They should not feel that TM CON is a prison and the staffs are kill Joys. 34. Non academic activities are the unidentified ‘hole' in the result bucket. 35.Conduct weakly revision followed by a one hour test on Monday. 36. As far as possible, do not make any changes in our academic master rotation plan for 52 weeks so that the implementation would be more effective. 37. Make the stude nts clear their doubts in the class itself or immediately after the class. Teachers should be available for that. 38. Help the students to adjust the timings and write the answers according to the marks. 39. Constantly appreciate the students and staff for all the good things comes from them. 40. Students Just mugging up the lecture notes and answer key is not advisable.Engage them in some small projects and assignments in their subjects. For the concern of the Management 41. Revise the admission criteria. Consider only those who have more than 70% marks in + 2. Those who got less than that are not fit for the present standards of KUAKA. We are trying to help a family by giving admission to this course. But ultimately we are putting that family in more grief and financial crisis. 42. A student who scores high marks in +2 may not be having any interest or caliber to pursue nursing studies. So strict scrutinizing should be done at the time of admission. 3.The present system of aptitud e test is quiet inadequate to evaluate their interest. It is simply a bunch of questions on physics, Chem.. , Bio, English and Bible. Hardly changed. 44. Let the board create an opportunity for the students to express their assessment and evaluation on their studies or any other topics. We realized that the Chairman and others in the board sat with students during a couple of lunch sessions was very encouraging for them. 45. Reduce the workload of students in the hospital. 46. Arrange faculty welfare programmer regularly without affecting academic aerogramme to relieve them from stress and burn out. 7. Minimize the external faculty for the first year. If needed find out those who can properly communicate to the fresher. Avoid Hi if – trainers. Students are new to the system and atmosphere. Several of them are from Malaysia medium. When they do not understand the teachers hi if stuff, they get mentally dejected. They are scare to express it to anybody. And thus their morale an d confidence level goes down. Their first impression about the course is that it is a hazardous task. That impression lasts throughout. So we need to create a very good first impression to them. 8.Arrange personality development classes like: Effective Time management, How to study well, Goal, How to get out of Exam Phobia, How to prepare for and write exams etc†¦ 49. A forum for expression should be given. It is good if it is a confidential. This is for the first time we get an opportunity to express our thoughts in the last 10 years. So keep a locked box in the reception area so that students, their parents and even the faculty in the college can write and put their suggestions. Either President or Secretary of the College Board only should be able to open it. 50.A big number of he faculty are uncomfortable in the campus due to various reasons. Provide a comfortable and peaceful environment for the faculty to work. Avoid situations which create unwanted stress from superiors in the college. 51. Unnecessary interferences of higher authority (in the campus) even in minute things should be avoided. Faculty should be given certain amount of freedom with an aim of the betterment of the institution in mind. 52. Very often teachers are being called to Principals office during class time. This should be avoided. Otherwise we lose the concentration and the flow.Sometimes we come back with a different mental set up. So avoid such interferences. 53. Individuality of the teachers should be considered. They have their own status. Do not treat them as mere subordinator. 54. When teaching faculty are in some trouble, help them to solve it instead of making it more complicated. More than the money, the Staff should get a Job satisfaction and mental peace. Create such an atmosphere in the campus. 55. Faculty should not be scolded in front of others (Students, parents and other faculty). If the principal or the board wants to say something to the staff, it should be done personally and privately.Avoid ego clashes. 56. At times, I had felt that I am still in a Barbarian era, where there is no concern for one another. Treat others with some respect. TM Con had a family atmosphere in the beginning. That feeling should come back. Faculty, right from the principal to the Junior most should sit together and discuss. Authorities should be willing to accept a good suggestion even if it comes from the Junior most. Faculty should get a listening ear. 57. A good working atmosphere would motivate both the students and faculty. A stressful atmosphere will force you to look always for n opportunity to get out.You feel like working more hard when you own it. A come back to the good old days. 58. More such barnstorming sessions should be arranged with heterogeneous group of people such as two students from each nursing batch, one from M Sc batch, Administrator, Wardens etc and they can be give these points as a background and make them answer to the same old quest ion. 59. We must provide more recreational facilities to the students. 60. Children who come out of their homes need comfort from their parents. So arrange telephones so that they can call their parents and talk to them.