Chemistry-soaps And Detergents :: essays research papers

Cleaning with soap and soapless detergents. Detergent comes from the Latin word detergere meaning to clean, it is defined as a cleansing agent. on that pointfore, pissing itself is a detergent. This essay looks at soap and soapless (or synthetic) detergents. Both substances we use ein truthday and have a big market commercially, they effect everyone. Soaps are make from natural products and soapless detergents are produced chemically, each having advantages and disadvantages.Soap has a much longer history than its relatively new synthetic version. There is evidence of soap made in Mediterranean countries around 2500 years ago. The basic process has not changed much although now the chemistry is understood. Soap is made from the process called saponification, the alkaline hydrolysis of fats and oils. It is fundamentally the reverse of esterification. O OR-C-O-R + NaOH ---- R-C-O-Na+ + ROHEster(fat) + base(caustic soda) ---- salt of fatty acid(soap) + alcohol(glycerol). Caustic po tash (potassium hydroxide) can be used instead of caustic soda (sodium hydroxide)but is more expensive. The base used to come from wood ash containing potassium carbonate which formed potash as this was not plentiful it made soap a luxury. The cheapest source of the ester is animal and vegetable fats and oils. H-H-H-H-H-H-H-H-H-H-H-H-H-H-H OH-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-CH-H-H-H-H-H-H-H-H-H-H-H-H-H-H O-Na+This is an example of a soap molecule. The hydrocarbon end is non polar and hydrophilic (water hating) and the carboxylate end is polar and hydrophilic (water loving). This the quality which allows it to clean, it acts as an emulsifying agent. The soap disperses in water to form miscelles where a negatively charged surface is formed and hydrocarbon chains are in the centre. These miscelles surround droplets of bull or grease suspending them in the water so they can be washed away. In soft neutral water soap works very well. However in hard water those containing ions (calciu m and magnesium ions) the soap reacts with the ions forming insoluble salts, scum which settles on fabrics and around the bath. A scum is also the result when soap is used in acidic water. Soap is also affected by the nature of the dirt, for example perspiration breaks down the soap reducing the washing power. There are other disadvantages of soap, it deteriorates on storage lacks cleaning power and doesnt rinse out completely. The production of synthetic detergents are an example of a quantity chemical approach. If a useful substance has some undesirable properties an attempt is made to make a near copy synthetically which will fare better.

Women in The Lone Ranger and Tonto Fistfight in Heaven by Sherman Alexi

Women in The Lone Ranger and Tonto Fistfight in Heaven by Sherman AlexieA warrior is recognized as sonmeone who battles for his/her beliefs. Even after receiving mortal wounds many times, such a person never leaves the battlefield. However, the inspiring and metaphorical idea of a warrior can certainly annex beyond the actual battlefield, and into the universal battle of living liveness. A woman must await this world like a warrior. She must endure the ache of a past that oppressed her, the adversity of a present that is only low to understand her, and a future that will continuously test her. From the beginning of time, inwrought American women have been a driving force in their cultures, retaining their immense strength throughout centuries of exploitation. Mothers and grandmothers held the family together with their gentle power, and medicine women were the local psychologists, therapists, physicians, and man and wife counselors to entire tribes. In The Lone Ranger and Tont o Fistfight in Heaven, Sherman Alexies short story collection about life on the Spokane Indian reservation, Alexie depicts characters that are world-wearied and arduous with 500 years worth of humiliation and rejection. They have lived their lives in the confines of the reservation, resorting to alcohol, depression, and frustration. However, these women seek to hold together, both gistually and generatively, the fabric of a culture that is assaulted on all sides. They are warrior-like in their determination to battle the hardships of their lives, all while holding their families and their heritage together with great compassion and spirit.Although one may lay out that many of these women were unable to avoid the inevitable feeling of hopelessness, one can see with a deeper look into the reservation that they firmly wrestle the battles that face them. The close immediate hardships that many of the women in Alexies stories face are the struggles to hold together their crumbling fa milies. For example, Victors mother must endure the various storms of her life her husbands alcoholism, the lack of basic necessities, her take in depression, and the overall desperation of the household. However, she is able to give her family a sense of hope. During all these kinds of tiny storms, Victors mother would rise with her medicine and magic?She would comb Victors braids into dreams. (p. 5) ... ...e women face their impedance with a warriors strength yet also with a maternal-like gentle compassion. Whether it is picking up the pieces of a broken family, reaching out to a community, or having arrogance in ones heritage and background, the women all show a sincere dedication that is truly admirable. A womans life is never easy, and the additional struggles of being a Native American make life on the Spokane reservation even harder. But these women bless the shields of their warriors as they face the unjust world, and they look towards the future with a warriors spirit t hemselves.Summary Paragraph The women characters in Sherman Alexies The Lone Ranger and Tonto Fistfight in Heaven all show great compassion and warrior-like strength, despite the many trials that face them. They are able to hold their families together and give them some sense of hope. These women also extend their dedication into their broken communities by offering kindness and refuge. However, the superior internal conflict that they face with strength is taking pride in their own heritage and spreading this pride. They face all of the innumerable opponents in life with a warriors spirit.

growaw Kate Chopins The Awakening - Edna Pontellier’s Awakening :: Chopin Awakening Essays

Ednas Awakening in Kate Chopins The Awakening The society of Grand islet places some(prenominal) expectations on its women to belong to men and be subordinate to their children. Edna Pontelliers society, therefore, abounds with mother-women, who idolized their children, worshipped their husbands, and esteemed it to a holy privilege to efface themselves as individuals. The characters of Adele Ratignolle and Mademoiselle Reisz demo what society views as the suitable and unsuitable woman figures. Mademoiselle Ratignolle as the ideal Grand Isle woman, a home-loving mother and a effectual wife, and Mademoiselle Reisz as the old, unmarried, childless, musician who devoted her life to music, rather than a man. Edna oscillates between the two identities until she awakens to the fact that she needs to be an individual, but encounters the resistance of societys standards to her desire. Kate Chopin carefully, though subtly, establishes that Edna does not neglect her children, but only her mother-woman image. Chopin portrays this idea by telling the reader ...Mrs. Pontellier was not a mother-woman. The mother-woman seemed to prevail that summer at Grand Isle. Edna tries on one occasion to explain to Adele how she feels about her children and how she feels about her ego, which greatly differs from the mother-woman image. She says I would give up the unessential I would give my money I would give my life for my children but I wouldnt give myself. I cant make it more clear its only something I am beginning to comprehend, which is revealing itself to me. This specifically contrasts the mother-woman idea of self-sacrificing for your husband and children. Also, the something . . . which is revealing itself does not become completely clear to Edna herself until just before the end, when she does indeed give her life, but not her self for her childrens sake. Although Edna loves her children she does not confuse her own life with theirs. Similarly to E dnas relationship with her children is that with her husband, Leonce. The Grand Isle society defines the role of wife as full devotion towards their husband and to self-sacrafice for your husband. Edna never adhered to the societies definition, even at the beginning of the novel. For example, the other ladies at Grand Isle all declared that Mr.

Character Essay :: essays research papers

Character EssayCharacterization, a method that an author chooses to fall apart his/her character, is a very important element in a story. In Lamb to the Slaughter, Roald Dahl, effectively develops the protagonist both directly and verifyingly however, the use of indirect characterization is more dominant because it reveals her actions and how she deals with her conflict, her words, and creating a dynamic character with her words, and her personality.First, she seems like a typical house-wife longing for her husband to return, but something is odd about this fussy day There was a slow smiling air about her, and about everything she didwas curiously tranquilthe eyes, with their new placid look, seemed larger, and darker than ahead (108). It was almost as if she is expecting something unusual to happen, and that she is preparing for that specific moment. In addition, her actions change from being a wife-pleasing-husband, to a self-conscious woman that knew all of a sudden, exactly what to do, as if she had been prepared for months. Also, in the beginning of the story she is described as a inoffensive, harmless person, but immediately after her husband reveals his burden, she becomes unstable and almost naturally she hits her husband. She simply walked up behind him and without any pause she swung the big frozen leg of lamband brought it down as hard as she could (111). And as strange as it looks, she goes fairly through a metamorphoses, from being a content house-wife, to a maniac, possessed woman, to the point of killing her husband.Second, she reveals through her words, her duplicity and deceitfulness by exterminating all the designate left. When the police arrived she trying to hide evidence, asks for her husbands whiskey, Jackwould you mind giving me a drink?You mean this whiskey?Yes, pleaseWhy tiret you eat up that lamb that is in the oven? (115,116), and the referee realizes that she tries to convince others with her deceitful lies, and with a concr ete set of credible words, she gets away easily She tried and true a smile. It came out so peculiarThe voice sounded so peculiar tooShe rehearsed it several times more (112). Mrs. Maloney, had thought about it even before the incident happened, for she tries to look as normal as possible, by acting it out her daily routine.Finally, her personality creates in her a dynamic characterization, and as the reader observes it when she is talking to the shopkeeper, by saying something very odd I got a nice leg of lamb from the freezerI dont ofttimes like cooking it frozenbut Im taking a chance on it this time.

Essay --

The American Constitution was a product of the extensive and considerable debates on theoretical argumentation. Robert Yates, assumed to be the writer of pseudonym Brutus I, represents the Anti-Federalist go through of regimes and the way that constitution should assert their powers on society, while Federalist 10 gives us an glimpse of the Federalist view of society. some(prenominal) these documents present us with the best examples of Anti-Federalist and Federalist thought. A major topic discussion between these two documents is the size of republics, as well as each view as to why their notions are the best for the new society.Anti-federalists and Brutus asserted that the new U.S. Constitution would eventually lead to the termination of the state governments, the consolidation of the Union into whiz great republic under an unchecked national government, and as a result the loss of free, self-government. Brutus additionally thought that in such an extensive and assorted natio n, nothing short of despotism could bind so great a country under one government. Brutus suggests that large governments give room for absolute and seditious power which allows for a large diverse government, which would, in turn, threaten personal liberty. These large governments lead to ambitious enterprises, glory, empire building, and adventurism all of which the Anti-Federalists agree should be prevented in a society. Brutus stresses homogeneity and virtue because these represent harmony and discordant principles. People are more likely to be civic spirited in a small republic, rather than a large one which the Federalists are supportive of. In the letter from Samuel Adams to John Scollay, we see Adams Anti-Federalist view of government. Adams supports... ... effect of factions, Madison argues that factions should be controlled and allowed to exist factions are not only essential to a republic but also natural and therefore unavoidable. While a variety of factions exist, Ma dison asserts that the strongest factions are those dealing with economics. As such, Madison advocates a large, commercial republic to control the effects of factions large in that the more factions exist, the less(prenominal) likelihood any one faction will gain absolute power as the factions will frequently form and re-form short-term coalitions commercial in that the individual must have freedom in the market in order to preserve the creation of economic factions. A republican form of government is essential to control factions since minorities are given some protection as the representative would be more interested in the public good than self-interest.

Medlife Insurance LTD Case Study :: Business and Management Studies

We have chosen a club called Medlife Insurance LTD. This gild deals with financial work, within that with life redress.Marketing Financial Services PresentationIntroductionWe have chosen a company called Medlife Insurance LTD. This companydeals with financial serve, within that with life damages. It ispart of a network of companies that sell life insurance and to beable to give a whole picture of the companys activities we willintroduce some of its partner companies as well. We will also give abrief description of the different kinds of services they provide tocustomers, such as life insurance for a whole family, life insurancefor a single person or life insurance for the company employees. Situation AnalysisGrazer Wechselseitige and other international investors foundedMedlife in the year 1994. Medlife started its business activities in1995. It is set up as a Cypriot seaward company and offers lifeinsurance products on US dollar basis. Medlife is an insurance company full of traditions and experience.Because of its traditions, seriousness and experience, it providesreliability of all activities in life insurance and capitalinvestments of Medlife. All sales are performed through the networkof SI-Save Invest Ltd, (one of the biggest independent andinternational insurance broker companies in the world that offers andsells financial services, specializes in capital forming lifeinsurance and disability insurance offered by its insurance partners),covering the former CIS and Baltic countries.Insurance and investment programmes have been developed that attentionencompassing the risks of everyday life and at the same time allow thecustomer to achieve a profitable return of the money invested.Contracts concluded among Medlife and its clients are subject toAustrian law which extensively protects the rights of Medlifesclients. Due to the very strict rules and regulations of theInsurance Contract Act and the Consumer Protection Act. GrazerWechselseitige Group in Austria, a well-known insurance company,provides fundamental insurance services like technical administration,funds investment, and reinsurance since 1828. These services aredelivered following the same principles of security and profitabilitythat do apply for Grazer Wechselseitige itself. Grazer WechselseitigeVersicherung AG is 100% financed on own capital and therefore does notrequire any investors ratings.Some examples of the financial services that Medlife is sellingEconomic Insurance PlanEconomic Insurance Plan is the ideal package for those who seekcomprehensive insurance coverage combined with an prospect toinvest capital in a profitable way.G5S -Endowment Insurance with graduated terminal benefits and surplusparticipation.The benefit to be paid in the case of death becomes payable if theinsured person dies before the end of the insurance term. The sum to

Heat Loss Investigation Essays -- Factors Affecting the Rate of Heat l

Heat Loss Investigation Introduction ============ In this investigation I will investigate heat loss and heat transfer in diametrical materials and I will also investigate which materials are the best insulators. A material that prevents this heat loss is c on the wholeed an insulator and this helps to keep the object that is universe insulated warmer for, longer. Heat is prevalently transferred in three different methods - - Conduction - Convection - Radiation Conduction is energy transferred from the hotter part of a solid to the colder part of conduction. It is transferred by the particles in the material the particles in the hot part are vibrating more. These vibrations are passed on to the cooler particles next to them, so the energy spreads through the material until all particles have the same energy. Metals are good conductors, whereas most non-metals are poor conductors and poor conductors are used as insulators. Convection is the tra nsfer of energy by the vogue of a liquid or gas. When a liquid becomes warm it expands and becomes less dense. The warmer fluid floats above the cooler fluid, which sinks. This creates a flow, which is called convection current. Radiation is when bodies emit radioactivity. essentially the hotter the body, the more energy it radiates. Dark, dull surfaces emit more radiation than light, shiny surfaces. They also absorb radiation well. Light, shiny surfaces do not absorb radiation well - they are good reflectors. Radiation can pass through space - that is how the warmth of the sun reaches the Earth. Also heat can be transferred by evaporation and this may be relevant i... ...results as it could have made it warmer or cooler. The method I chose to use was successful and worked well in spite of appearance the investigation it was stable and fair. I would not change the method if I repeated the investigation as it worked well with the experiment. Als o to improve my investigation I could have done many things. I could have repeated the experiment again and took down the average results and this will make the experiment more undefiled as one set of my results could have been affected. Also there would have been different temperatures within the beaker thought they would have only been slight differences. The temperature would be different with the water nearer to the glass compared to the water directly in the middle. So it would have helped if I stirred the water so I could get the general temperature.