Biochemical Processes of Oil Degradation

Biochemical Processes of Oil Degradation 1. INTRODUCTION Surfactants are surface active compound that reduce the interfacial tension between two liquids, or that between a liquid and a solid. Surfactants are organic compound that contain both hydrophobic (head part of the surfactant) and hydrophilic (tail part of the surfactant) moieties. Thus surfactant contains both water insoluble i.e. water repellent group as well as water soluble i.e. water loving group. Biosurfactants are also surface active compound like chemical surfactants but unlike the chemical surfactant, biosurfactant are synthesized by microbes like bacteria, fungi and yeast. Biosurfactants comprise the properties of dropping surface tension, stabilizing emulsions, promoting foaming and are usually non-toxic and biodegradable. Recently interest in biosurfactant has increased because of its diversity, flexibility in operation, and more eco-friendly then chemical surfactant (BS Saharan et al., 2011; Eduardo J. gudiËÅ"na et al., 2011). Biochemical processes of oil degradation carried out by microbes involves several type of enzymatic reactions driven by oxygenase, dehydrogenase and hydroxylase (Hamamura N et al., 2008). These enzymes cause aliphatic and aromatic hydroxidation, oxidative deamination, hydrolysis and other biochemical transformation of original oil substance leading to formation of large number of intermediate degradation products. However, a major limitation of microbial degradation of crude oil is its hyydrophobicity. Biosurfactant produced by oil degrading bacteria facilitate the uptake of crude oil hydrocarbons by bacterial cells and also have low toxicity and high biodegradability (Batista SB et al., 2006). So, crude oil degrading bacteria with the ability to produce biosurfactant is widely recommended for fast degradation of crude oil. (Kumar M et al., 2006). Furthermore possibility of their production on large scale, selectivity, performance under intense conditions and their future applications in environmental fortification also these have been increasingly attracting the attention of the scientific and industrial community. These molecules have a potential to be used in a variety of industries like cosmetics, pharmaceuticals, humectants, food preservative and detergents (BS Saharan et al., 2011). But the production of biosurfactant on industry level is still challenge because of using high costly synthetic media for microbial growth. Biosurfactants are classified on the basis of diversity in their structure and their microbial origin. They contain a hydrophilic group, that contain an acid, peptide cations, or anions, mono-, di- or polysaccharides and a hydrophobic group of unsaturated or saturated hydrocarbon chains or fatty acids. Biosurfactants produced by a variety of microorganisms mainly bacteria, fungi and yeasts are diverse in chemical composition and their nature and the amount depend on the type of microbes producing a particular biosurfactant. 1.1 Classification of Biosurfactant: Biosurfactants are classified in to two major group one is low molecular weight surface active agent call biosurfactant and high molecular weight substance called bio-emulsifier that is especially used as enhancement of emulsification of hydrocarbon. Further these two major group is divided in to six major group known as glycolipids, lipopolysaccharides, lipoproteins-lipopeptides, phospholipids, hydroxylated and cross linked fatty acids. (a) Glycolipids: Mostly biosurfactants are glycolipds. They are lipids with a carbohydrate attached. The connection is by means of either an ether or ester group. Among the glycolipids, the best known are rhamnolipids sophorolipids and trehalolipids. Fig 1: Glycolipid (b) Rhamnolipids: Rhamnolipids is a group of biosurfactant that studied extensively. These are produced by many species of Pseudomonas and have tremendous antimicrobial activity against several common microorganisms, which is an essential property of all cosmetics due to the daily contamination of the product by the human touch (Lourith N et al., 2009). Rhamnolipids is a type of glycolipid biosurfactant that contain either a one or two molecule of ÃŽ ²-hydroxydecanoic acid. In 1999 the structure of rhamnolipid produced by P. aeruginosa on mannitol and nepthalene by liquid chromotography was compared. And it was found that for mannitol the most common rhamnolipid contained two rhamnoes and two 3-hydroxydecaonic acid and whereas rhamnolipid produced by nepthalene contained two rhamnoes and one 3-hydroxydecaonic acid. Fig 2: Structure of mono and di rhamnolipid (c) Trehalolipids: It is another type of glycolipids that containing trehalose hydrophobic moieties. Such type of biosurfactant structure is diverse in hydrophobic moieties, varying from short fatty acid to long fatty acid chain. In general it is observed that the bacteria showing Gram’s positive produces Trehalolipids biosurfactant (Anderson RJ et al, 1983). Fig 3: Structure of Trehalose lipid (d) Sophorolipids: Such glycolipids are synthesized by yeast; these are the complex mixture of both free acid and lactone form. The acidic SL contain fatty acid as tail where as SL lactonic are formed by the esterification between carboxylic end of the fatty acid and 4† of the sophorose end. Generally lactonic SL has better surface tension lowering property whereas the acidic SL have better potential to form foam and solubility properties (Nuneza A. et al., 2003). Fig 4: Structure of Sophorolipid lactonized and acid Form. 1.2 Lipopeptides and lipoproteins: Lipopeptide biosurfactants are cyclic compounds and they are mostly isolated from Bacillus and Pseudomonas type bacteria Lipopeptides mainly consist of hydrophilic peptides, generally they consist 7 and 10 amino acids long, linked to a hydrophobic fatty acid structure. Bacillus cyclic lipopeptides consist of three major groups known as the surfactin, iturin and fengycin families. Surfactin is the most commonly studied and it contains 7 amino acid cyclic sequences connected to a C13–C16 fatty acid (Kakinuma A. et al.,1969). Fig 5: Structure of aminolipopetide Fig 6: Structure of cyclic aminolipopetide 1.3 Polymeric Biosurfactants: Polymeric biosurfactant are high weight molecular biopolymers which consist polysaccharides, proteins, lipopolysaccharides, lipoproteins or mixture of theses biopolymers. A wide variety of microbes produces polymer biosurfactant. Polymer biosurfactant exhibits properties like high viscosity, tensile strength, and resistance to shear. The following are example of different type of polymeric biosurfactant. 1.4 Advantages and Uses of Biosurfactant: The unique properties of biosurfactant (Microbial Surface Active Agents) such as low toxicity, relative ease of preparation and widespread applicability, make it different from chemical synthetic surfactant and now it has become recently an important product of biotechnology for industrial and medical applications and they allow to replacement of chemical synthetic surfactant. They can be used as emulsifiers, de-emulsifiers, wetting agents, spreading agents, foaming agents, functional food ingredients and detergents in various industrial sectors such as, Petroleum and Petrochemicals, Organic Chemicals, Foods and Beverages, Cosmetics and Pharmaceuticals, Mining and Metallurgy, Agrochemicals and Fertilizers, Environmental Control and Management, and many others. Table 1. Classification of biosurfactants and their use in remediation of heavy metal and hydrocarbon contaminated sites. (Magdalena Pacwa-PÅ‚ociniczak et al., 2011) Stabilization of the hydrocarbon-in-water emulsions Dispersion of limestone in water Stabilization of hydrocarbon-in-water emulsions Alasan Acinetobacter radioresistens KA-53 Biodispersan Acinetobacter calcoaceticus A2 Liposan Candida lipolytica Mannoprotein Saccharomyces cerevisiae There are many advantages of biosurfactant as compare to chemically synthesized surfactants. Some of those are: Biodegradability: Easy to biodegradable as compare to the chemical surfactant (Kosari N, 1992). Low toxicity Biocompatibility and digestibility, that allows their application in cosmetics, pharmaceuticals and food seasonings. Easily availability of raw material: The raw material need for production of biosurfactant are easily available, biosurfactant producing microorganism can be isolated from the industrial waste like oil contaminated soil, petrol pump spilled, and also can be isolated from municipal waste. Use in environmental control: Biosurfactants can be efficiently used in handling industrial emulsions, control of oil spills, biodegradation and lowering the toxicity of industrial discharges and in bioremediation of polluted soil. Specificity in their action, since biosurfactant has specific organic functional group and often specific in their action. This is particularly used in lowering the toxicity of the pollutant, used in enhancing the emulsification property, used as raw material in cosmetic, medicinal and foodstuff applications. 1.5 Crude oil spills The crude oil spills are one of the main environmental pollutants. Their abundance and persistence in several polluted environmental areas have been reported (Mohammed M. A., 2004). Oil spillage may be caused by natural disasters like earthquakes in the sea surface or due to accidental leaks during exploration, refining, storage and transportation. The causes can be numerous but the consequences are the same. In case of crude oil, the different types such as heavy or light crude oil can affect the clean-up procedures. Crude oil spreads very rapidly on the sea surface and after a short period of time the thickness of the oil film can be at least 1mm. It is therefore necessary to prevent the spreading to reach the shoreline. Once it reaches the shoreline, it contaminates the soil and cause a great damage to the soil ecosystem as well. Some of the largest oil spills that have taken place all over the world are at Iran, Iraq, Persian Gulf, Uzbekistan, Kuwait, United States, Gulf of Mexico, Pakistan and even in India. The most recent oil spill in India is the spill of ONGC Trunk oil pipeline burst, at Uran, Mumbai on 21st January 2011. Around 40 to 45 metric tons of oil was spilled in Mumbai coast that spread around 4 sq km area. Many such disasters reported one seeping oil from a sinking ship. In August 2010, oil spill at Gopalpur beach Orissa in April 2010 causing the death of many Ridley turtles that breed there during that period. It hence becomes a necessity to clean up this oil in order to save the marine life. Clean-up and recovery of hydrocarbons from an oil spill is difficult and the strategies for cleaning up an oil spill are greatly affected by a variety of factors such as the type of oil spilled, the temperature of the water body, and the types of shorelines and beaches involved. A number of approaches an d technologies have been developed for spreading of oil spills in marine shorelines and freshwater environments. Many mechanical and chemical methods can be applied to clean-up the spills (Zhu et al., 2001). Fig 7: Crude oil spill 1.6 Methods applied in cleaning of oil spills 1.6.1 Physical methods Booms. Skimmers. Manual removal (Wiping). Mechanical removal. Washing. Sediment relocation or Surface washing. Tilling. In-situ burning 1.6.2 Chemical methods Dispersants. Demulsifies. Solidifiers. Surface film chemicals. Although various conventional cleaning methods such as physical methods like the first response selection, rarely achieve complete cleanup of oil spills. According to the Office of Technology Assessment (U.S. Congress, 1991), current mechanical methods typically recover no more than 10-15 percent of the oil after a major spill. Chemical methods are faster in action but they are toxic to the biota present in the spill environment. Bio-surfactants can be used for cleaning of crude oil spillage. 1.7 Hydrocarbons of Crude oil: Oils are further categorized into three broad groups, according to their molecular weight. General statements can be made for each of the three categories namely light weight, medium weight, and heavy weight components (Scholz et al., 1999). Crude oils are composed of various combinations of these three categories with the following general characteristics. 1.7.1 Light Weight Components: These are components which have carbon atoms ranging from C1 to C10 which are smaller molecules with few numbers of atoms. They are characterized by high volatility, readily dissolvable and evaporate and leave little or no residue because of their short residence time. Many of these components (e.g., benzene, and toluene) are thought to be more bioavailable to animals by primary exposure route (respiratory system). Being highly flammable and readily inhaled, and therefore are of concern for human health and safety. 1.7.2 Medium Weight Components: These are components which have carbon atoms ranging from C11 to C22 which have complex molecules. It has low rate of evaporation and dissolves very slowly that take several days with some residue remaining. Not as bioavailable as lower weight components, it is less likely to affect aquatic animals. Its primary exposure route is respiratory system and gets readily absorbed through skin. 1.7.3 Heavy Weight Components: These are components which have carbon atoms more than C23. It has the longest residence time with very little loss due to evaporation or dissolution. It can cause chronic effect through smothering as residue in the water column and sediments (tarballs, etc). Its primary exposure route is direct topical contact. Some heavy weight components contain carcinogens that are absorbed through the skin. Its risk of exposure is increased due to long residence time, probability of contact, and adsorption property of the oil components. Table 2: List of oil spill incidents since 2010 1.8 Oil Spills and Their Effects: Recently on 21st January 2011, ONGC trunk oil pipeline burst at Uran, Mumbai. About 40 to 45 metric tons of oil was spilled and spread around 4 sq km area. On 7th August, 2010 a foreign cargo ship, collided with another vessel about 10 km off Mumbai harbor, that spilled the oil in spite of the hectic effect made by Navy and Coast Guard to contain the leak, around 700 tons of fuel oil and 28 tons of diesel oil was spilled. Thousands of eggs of the endangered Olive Ridley Turtles on the beach adjoining river Rushikulya in Ganjam district have failed to hatch this year because of the recent 924 tons of furnace oil spill at a nearby port. Rushikulya Sea turtle protection committee have found that the hatching of the eggs, which ended last week, have gone down by 40 to 50 percent this year as the eggs, numbering thousands, got spoiled after the leaked oil soaked the nesting site on the beach. A number of incidents have been reported happening every year. Some of the oil spill incidents ar e listed in the Table 2. Oil spills kill wildlife and damage the ecosystem that can last for generations by forcing changes in reproduction and compromising complex food webs. Oil spill damage to the waterways of birds and animals, destroys the animal immune systems, interrupt breeding and fouling of breeding grounds. Besides, they thin bird and turtle egg shells and also damage the fish larvae, causing deformities. They cause damage to sea grass beds and other shelter/feeding areas, tainting of algae, which perform a vital role in waterway ecosystems. Due to oil spill on soil the insects and worms living in it are killed due to hydrocarbon toxicity, lack of oxygen supply and it reduce the pH of the soil. This affects the fertility of soil and its productivity in terms of the growth of plants (Wokocha G.A., 2011). As a result soil eco system is getting disturbed and it effects the plant growth. Soil oil also contaminates ground water and it causes illness to the human beings and animals when consumed.

Red Faction :: essays research papers

*************************** 29. Refuse Disposal Plant *************************** Open the elevator door by hitting the button to the right. Head forward, and Gryphon will run up ahead to the incinerator controls. ======================================================================= = Hendrix: This is Ultor's main trash disposal facility. = ======================================================================= ======================================================================= = Hendrix: That's an Ultor Personnel Suppression combot. I didn't = = know they had any on Mars! = ======================================================================= ======================================================================= = Hendrix: I can't see Orion's group on my monitors anymore. = ======================================================================= While Gryphon takes the first left, go forward up the ramp and through the door. Climb the ladder up ahead, then climb a second ladder to get to the roof. You'll be shot at by the combat as you climb, but just ignore it and get up there. He'll have a tough time hurting you while you're up here. Follow the instructions and you shouldn't lose a single point of health, despite the holes he might create with his rockets. As you look around the outer edge of the massive roof, you'll see several groups of ammo crates. Make your way around the outer edge as you make your way to each one to find ammo, medkits, armor, and a rocket launcher. Make sure to snuggle up to each crate and jump on top of it to make sure you get every last piece of ammo and equipment that you can. Once you're done, equip the rocket launcher and climb back down using a ladder away from the one you climbed up. The combot should be shooting at you, so begin making your way to the lower level door. Most importantly, keep moving and take some shots at the combot with the rocket launcher while you can. Keep taking shots at the combot and luring him out the large door on the ground floor until Hendrix cuts in. ======================================================================= = Hendrix: There's a disposal pit at the lowest point of this level. = ======================================================================= ======================================================================= = Hendrix: Try to lure the bot out onto the pit's covering, then open = = the doors from the control room. = ======================================================================= At this point, you've damaged the combot enough and he's really ticked off. Now just turn around and run back to the disposal pit. Once the combot approaches the last corridor leading to the pit's covering, run to the right and climb the ladder to the control room (where Gryphon is cowering in fear). The combot will be unloading everything he's got at you, but ignore it and quickly hit the right button to open the pit, then hit the left button to turn on the ceiling fan to blow the combot down into it. Rather than waiting and watching to make sure it happens,

Odwalla Case Essay

Odwalla Incorporate is known for high quality products and it takes pride in the way the juices are made. However, with E. coli crisis it has become extremely difficult to maintain that standard unless Odwalla designs a proper strategy to counter the effect. I will help you design a communication strategy for each stakeholder to emerge from this crisis, regain loyalty and improve brand image. Odwalla must take full ownership of this crisis and communicate to its stakeholders about the recall process, quality assurance policies and steps taken to resolve the issue. The timing and the process is extremely important to communicate effectively. Below are the list of key issues and the communication strategies for each stakeholder that will help get through this crisis. KEY ISSUES Some of the key issues that Odwalla face because of the E. coli breakout are: †¢Determining communication strategy to respond in the crisis †¢Identifying pasteurizing methods to maintain the same taste and quality †¢Maintaining current core competency – use of minimal production processes to deliver superior taste and nutritional values †¢Researching side effects of adding chlorine, as suggested by a quality assurance manager †¢Identifying ways to provide safe products in future †¢Identifying ways to maintain the customer loyalty †¢Identifying strategy to regain stakeholders’ faith †¢Handling lawsuits from affected consumers These issues will affect the company’s future business operations. Therefore, Odwalla must take immediate action to contain the breakout and find solution to avoid re-occurrence in future. COMMUNICATION STRATEGIES FOR EACH STAKEHOLDER Odwalla must communicate with all of its stakeholders. The following are the communication strategies for the nine most important Odwalla stakeholders – the affected customers, the public, the employees, the crisis management committee, the distributors, the retailers, the suppliers, the officials, and the shareholders/investors. Affected Customers †¢Apologize immediately and take full responsibility for the crisis to the affected consumers by contacting them by phone or paying a visit †¢Guarantee appropriate measures will be taken to fix the issue †¢Send condolences letters to all consumers who are affected by consuming the Odwalla juice and compensate them for medical costs and hardship Public †¢Launch TV, Radio and Internet advertisements to inform everybody about the crisis and seek apology †¢Regain consumer’s confidence by assuring that this issue will be resolved soon †¢Arrange factory tours for public assurance Employees †¢Call in for all-employee meeting to explain the crisis and ask employees for ideas to pasteurize the products by maintaining same taste †¢Send out a memo to all employees requesting them to contact crisis management committee with ideas and inquiries †¢Instruct all employees to direct any questions or inquiries from media to Internal communication department Crisis management committee †¢Identify the batch numbers of the affected products †¢Quarantine all the affected products †¢Develop the recovery plan and review with officials before implementation Distributors †¢Send memos to distributors with batch numbers and ask them to recall the products and freeze any supply going to the retailer †¢Tell distributors to dispose all the products matching the batch numbers given to them Retailers †¢Send memos to retailers with batch number and ask them to recall the affected products. †¢Work with retailers for any customer re-funds requests Suppliers †¢Suspend receiving of all the supplies from the suppliers †¢Ask suppliers to look for E. coli in their supplies and urge them to take appropriate actions †¢Discuss with supplier for ideas and methods to avoid any contamination even before the products get to Odwalla facility Officials †¢Communicate openly with the health agencies and law officials by cooperating with the investigation process †¢Explain the recovery plan developed by crisis management committee †¢Get certified for the process from the health agencies Shareholders/Investors †¢Call for immediate Board of director meeting and explain the crisis, recovery plan and cost of fixing the crisis NEXT STEP Odwalla must take immediate action to avoid damage to customer’s confidence level and lose faith in stakeholders. In order to resolve the issue quickly Odwalla must take following important steps: †¢Identify the contaminated batch numbers †¢Quarantine the contaminated products †¢Communicate with all stakeholders †¢Find the root-cause of contamination †¢Implement the solution from root-cause analysis †¢Get approval from health agencies †¢Keep consumers updated via advertisements – TV, Radio, Newspapers and Flyers †¢Organize factory tour for customer satisfaction FINAL WORDS Odwalla must communicate immediately by enforcing the communication strategies. The consequences for not communicating effectively are worse and will affect from losing customers to long lawsuits and filing bankruptcy. It will be very challenging to find a solution that will maintain the same taste and not to have pasteurized the products. However, you will find smart and effective ways of communicating with stakeholders in this memo that will not only help Odwalla regain the lost glory but also avoid any adverse implications. With every Core Competencies, there are rewards and crisis. Odwalla must embrace this crisis as a lesson learned and use this experience to come up with new tools and technologies for production process and live up to its vision: â€Å"Odwalla’s vision has always been to nourish people everywhere with the ineffably honest art and rhythm of nature’s offerings. We live on the principle of respect for our consumers who rely on us for consistent quality in taste and nourishment and respect for the earth on which we rely for holistic nourishment† I would like you to consider my communication strategies and be calm and patient in handling the crisis. Please feel free to contact me for any questions you may have.

Free Essays on Napoleon Bonparte

NAPOLEON BONPARTE The most famous Frenchman in history - Napoleon Bonaparte wasn’t born a Frenchman. Napoleon was born at Ajaccio, Corsica on 15 August 1769. Napoleon’s parents Carlo Buonaparte and Litizia Ramalono Buonaparte were both of Corsican - Italian blood. When France ceded with Corsica Napoleons father entered the French aristocracy as a count. Napoleon was educated first at Brienne and then at the à ¨cole Militaire, in Paris. Napoleon graduated in 1785, age 16 and enlisted in the artillery as a second lieutenant. Napoleon became a lieutenant colonel in 1791 in the Corsican National Guard. Corsica declared its independence in 1793 and Bonaparte, a French patriot, fled to France with his family. In 1796 Napoleon was made commander of the army of Italy. In quick succession Napoleon achieved victories all over Europe. When Napoleon returned to France he was triumphant. He was only 28 years old and had become the greatest French general of all time. Bonaparte decided to leave his army in Italy and set his sights higher - Napoleon wanted to save France. Napoleon joined a conspiracy against the government and on November 10 he and his colleagues seized power and established their own government - The Consulate. Napoleon reformed all government, education and legislation, which proved he was a magnificent statesman and administrator. Napoleon proved a patriotic loyal Frenchman who wanted to improve life for his fellow French people. Napoleon was crowned Emperor of the French in 1804 - he was now a great Frenchmen and heroic General and destined to become the greatest leader France had ever had. Napoleon introduced ‘The Continental System’ which forbade all European nations trading with France’s enemy Britain. In 1810 the Russians proclaimed they wouldn’t abide by this system and France retaliated by invaded Russia but ended up retreating to Paris. Europe now believed that France could be beaten... Free Essays on Napoleon Bonparte Free Essays on Napoleon Bonparte NAPOLEON BONPARTE The most famous Frenchman in history - Napoleon Bonaparte wasn’t born a Frenchman. Napoleon was born at Ajaccio, Corsica on 15 August 1769. Napoleon’s parents Carlo Buonaparte and Litizia Ramalono Buonaparte were both of Corsican - Italian blood. When France ceded with Corsica Napoleons father entered the French aristocracy as a count. Napoleon was educated first at Brienne and then at the à ¨cole Militaire, in Paris. Napoleon graduated in 1785, age 16 and enlisted in the artillery as a second lieutenant. Napoleon became a lieutenant colonel in 1791 in the Corsican National Guard. Corsica declared its independence in 1793 and Bonaparte, a French patriot, fled to France with his family. In 1796 Napoleon was made commander of the army of Italy. In quick succession Napoleon achieved victories all over Europe. When Napoleon returned to France he was triumphant. He was only 28 years old and had become the greatest French general of all time. Bonaparte decided to leave his army in Italy and set his sights higher - Napoleon wanted to save France. Napoleon joined a conspiracy against the government and on November 10 he and his colleagues seized power and established their own government - The Consulate. Napoleon reformed all government, education and legislation, which proved he was a magnificent statesman and administrator. Napoleon proved a patriotic loyal Frenchman who wanted to improve life for his fellow French people. Napoleon was crowned Emperor of the French in 1804 - he was now a great Frenchmen and heroic General and destined to become the greatest leader France had ever had. Napoleon introduced ‘The Continental System’ which forbade all European nations trading with France’s enemy Britain. In 1810 the Russians proclaimed they wouldn’t abide by this system and France retaliated by invaded Russia but ended up retreating to Paris. Europe now believed that France could be beaten...

Free Essays on Symbolism In The Scarlet Letter

Symbolism in The Scarlet Letter Pearl is a great example of symbolism in The Scarlet Letter. In chapter six when Hester is talking about her daughter Pearl, of The Scarlet Letter Nathaniel Hawthorne says, â€Å"in giving her existence a great law had been broken.† Since Pearl was born, she was actually the scarlet letter, because if Pearl had never have been borne, Hester would have never been found guilty of adultery, and would have never had to wear such a burden on her chest. Also, in chapter six. it shows Pearl’s fascination of the scarlet letter and seems to torture her mother by playing with it. Pearl symbolized God’s way of punishing Hester for adultery. On page 61 in The Scarlet Letter, when Pearl is being explained as an innocent child, Hawthorne writes â€Å"a lovely and immortal flower.† Pearl, to Hester, was a flower, at sometimes she was very happy, joyful, and full of life and color but on other days she was â€Å"wilting† which brought Hester much grief. In The Scarlet Letter it shows how if a person sins against God, he/ she will pay for what they did, even through that particular sin. Pearl brought some joy to Hester, but she brought even more grief by being a constant reminder of her sin, by pestering Hester while she wore the letter, and by being a wilting flower, all of this shows how one sin can bring you much grief. Pearl also did many symbolic things that made the Puritans’ ideas of life change. On page 194 Hawthorne writes, â€Å"And she was gentler here than in the grassy-margined streets of the settlement, or in her mother’s cottage. The flowers appeared to know it.† Pearl fit in with natural things, which was considered evil to the Puritans, (Encarta) but Pearl is showing them how the forest is beautiful and natural. According to chuckii.com â€Å"Hester’s child, is symbolic of changing Puritan society.† Pearl changes the puritan society because she is the outcome of the scarlet letter... Free Essays on Symbolism In The Scarlet Letter Free Essays on Symbolism In The Scarlet Letter Symbolism in The Scarlet Letter Pearl is a great example of symbolism in The Scarlet Letter. In chapter six when Hester is talking about her daughter Pearl, of The Scarlet Letter Nathaniel Hawthorne says, â€Å"in giving her existence a great law had been broken.† Since Pearl was born, she was actually the scarlet letter, because if Pearl had never have been borne, Hester would have never been found guilty of adultery, and would have never had to wear such a burden on her chest. Also, in chapter six. it shows Pearl’s fascination of the scarlet letter and seems to torture her mother by playing with it. Pearl symbolized God’s way of punishing Hester for adultery. On page 61 in The Scarlet Letter, when Pearl is being explained as an innocent child, Hawthorne writes â€Å"a lovely and immortal flower.† Pearl, to Hester, was a flower, at sometimes she was very happy, joyful, and full of life and color but on other days she was â€Å"wilting† which brought Hester much grief. In The Scarlet Letter it shows how if a person sins against God, he/ she will pay for what they did, even through that particular sin. Pearl brought some joy to Hester, but she brought even more grief by being a constant reminder of her sin, by pestering Hester while she wore the letter, and by being a wilting flower, all of this shows how one sin can bring you much grief. Pearl also did many symbolic things that made the Puritans’ ideas of life change. On page 194 Hawthorne writes, â€Å"And she was gentler here than in the grassy-margined streets of the settlement, or in her mother’s cottage. The flowers appeared to know it.† Pearl fit in with natural things, which was considered evil to the Puritans, (Encarta) but Pearl is showing them how the forest is beautiful and natural. According to chuckii.com â€Å"Hester’s child, is symbolic of changing Puritan society.† Pearl changes the puritan society because she is the outcome of the scarlet letter...

History Assignment Example | Topics and Well Written Essays - 500 words - 5

History - Assignment Example 1. Totalitarian State: Totalitarian state is the government which holds a strict control over the citizens of the state and monitors all aspects of their life giving them very less freedom. In such a form of government people possess less freedom to act by themselves and they put them in a condition of suffering and suffocation. 2. Mein Kampf & Lebensraum :Mein Kampf is the book written By Adolph Hitler in which he describes about the German’s need for Lebensraum .Lebensraum Means habitat or space for living and the raw materials needed for life. 3. Shutzstaffel/the S.S. : S.S or Shutzstaffel was a group of people who was formed to protect the Nazi leader Adolf Hitler, and in other terms it was a unit of personal guards to secure him from danger. This Unit was found in 1925 under the leadership of Heinrich Himmler and this guards were infamous for their atrocities as they work for the worst dictator the world have ever seen called Adolf Hitler. 4. Battle of Midway & â€Å"island hopping† : Battle of Midway was a significant naval battle occurred during the World War II in June 1942.This battle took place in Central Pacific Island in Midway in which Japanese wanted to capture Midway region to attack US. While Island Hopping is the strategy used by US to move closer to Japan by hopping islands which was useful to them for war

The best parenting style Research Paper Example | Topics and Well Written Essays - 1750 words

The best parenting style - Research Paper Example Several studies discovered that parenting style can affect the personalities and behaviors of their children (Evans, 2012; Baldwin, McIntyre, & Hardaway, 2007). To determine the best patenting style, a number of secondary sources and one primary source have been used. In several cases, the best parenting style is authoritative parenting, although other factors, including culture, family dynamics, and children’s traits can affect the decision for choosing the style that fits the context and individualities of children. Authoritarian parents are not very good in raising happy, confident, sociable, and high-achieving children. These parents integrate high control with low warmth or parental involvement (Kail & Cavanaugh, 2010, p. 250). They want to nurture the values of hard work, compliance, and discipline among their children (Kail & Cavanaugh, 2010, p.250). Clinical psychologist Block described that authoritarian parenting focuses on maintaining control and authority (personal communication, October 20, 2012). She stated: â€Å"[Authoritarian parents] use their authority to control their children. They make rules that are explained through the need to be obedient to authority† (personal communication, October 20, 2012). She explained that authoritarian parents are strict and demanding because they expect their children to act as adults. Their punishment tends to be physical and punitive: â€Å"They punish children who do not follow their rules, sometimes through spanking them† (B. Clock, personal communication, October 20, 2012). Furthermore, authoritative parents rarely show warmth toward their children because â€Å"many think that warmth will make their children weak† (B. Clock, personal communication, October 20, 2012). Authoritarian parents think that control and less emotional interaction is the best way to raise children. Kail and Cavanaugh (2010) noted from their review of studies that authoritarian parents raise children who tend to be unhappy and overly aggressive, while permissive parents tend to have children with poor self-control and are very impulsive. Block explained that the children of authoritarian parents can have extreme behaviors (personal communication, October 20, 2012). On the one hand, some are â€Å"rebellious and have been involved in alcohol and drug abuse† (B. Clock, personal communication, October 20, 2012). Some have developed â€Å"bullying behaviors† (B. Clock, personal communication, October 20, 2012). On the other hand, others are very â€Å"obedient and efficient in following rules† (B. Clock, personal communication, October 20, 2012). Block underlined that they follow because of â€Å"fear for punishment, and not because they believe that it is right† (personal communication, October 20, 2012). Happiness is elusive too: â€Å"I have interviewed these children and none of them are happy. They may project high self-esteem, but they are very uncert ain in discussing their goals and identity† (B. Clock, personal communication, October 20, 2012). Hence, children of authoritarian students are not always happy and successful in their chosen fields, probably because of their reaction to their parents’ authoritarian control on their lives. Permissive parents may be too lenient, although they can raise self-assured and disciplined students too. Permissive parenting has little rules and demands; these parents are very responsive to their children’s emotional needs (Shaffer, 2009, p. 378). The idea is to