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Chemistry Essay

Analysis & Quality
Fifield & Kealy (2000,p524) point out that a typical analytical laboratory carries out development and day-to-day application of analytical methods in optimum conditions. According to them, the successful functioning of activities in an analytical laboratory necessitates simultaneous management of a number of related but different operations. Reproducibility, reliability and efficiency of operation of various instruments are as much necessary as are collation and interpretation of data which
Pages: 8 (2000 words), Essay
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Heat and the Kinetic theory of matter
Generally speaking endothermic and exothermic reactions account on the comparison of heat gained or lost to the surroundings as the environment helps keep one end of the deal at constant r. (room temperature and pressure) helping in determining which reactions are more active than others.Let us now take a very common example regarding a much general chemistry case that involves either exothermic or endothermic reactions. On significant terms endothermic reactions are rather slow in nature
Pages: 4 (1000 words), Essay
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Human Toxic Chemical Hazard And Risk Assessment
The poisoning caused by this toxin is both target organ and systematic. The intoxication is target organ since it affects the liver, causing its damage and causing other liver diseases such as liver cirrhosis, hepatic fibrosis and fatty liver disease (Abash, 125). The intoxication is also systematic since it causes a variety of different cancers on the body, affecting different body parts. The poisoning caused by the toxin can also cause the blockage of small arteries, due to blood clots
Pages: 5 (1250 words), Essay
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'The regulation of enzyme activity is the most most important and fundamental control for a cell'-Discuss
Increasing the amount of the enzymes in the cell can be done by the cell in two way; elevating the synthesis rate of the enzymes or by slowing the rate of the enzyme degradation. The cell in this case has the role to regulate the enzyme content in it which is a stringent exercise owing to the fact that there are millions of enzymes in the body each effecting a unique role probably at the same time and has to be controlled and regulated concurrently.The regulation of the enzymes in the cell
Pages: 4 (1000 words), Essay
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Investigation of an enzyme catalysed reaction
The reaction proceeds as follows;This equation shows enzyme catalase converting hydrogen peroxide into hydrogen and water. Because enzymes are proteins, they can be denatured by high temperatures. They are also inactivated at low temperatures.Potato, gram balance, blender, ice insulated ice bucket or water cooler, water bath at 10º, 30º and 40º, 500ml 1% H2O2, 1ml distilled water, 1ml adjustable pipettor, filter paper disks, forceps, 5 50ml beakers, 100ml graduated cylinder, thermometer and
Pages: 4 (1000 words), Essay
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Colourimetric Assay for Paracetamol
The assay is comprised of two parts which are the preparation of standard solutions and obtaining a calibration graph, and analysis of paracetamol tablets. For the first part, paracetamol is weighed into a beaker and dissolved in deionized water. This is done in a 1-L volumetric flask where the deionized water is added up to the mark. A specific volume of the resultant solution from the flask is taken and diluted to about 10 times the original volume taken. This solution is the stock solution
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Q1./ Discuss how the primary, secondary and tertiary structure of a protein will influence the way in which it behaves when it adsorbs at an oil droplet surface in a food emulsion. Q.2/Describe the molecular characteristics of globular proteins that allo
Both α-lactalbumin and ß-lactoglobulin bind on the surface of casein micelles. During emulsification, milk proteins can rapidly adsorb on the surface of newly formed oil droplets. This adsorption decreases interfacial tension and leads to the formation of thick layers that prevent the flocculation or coalescence of oil droplets through electrostatic and steric stabilization mechanisms.Different proteins in a food system exhibit different degree of stabilizing and emulsifying properties due to
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Industrial production of aluminium from bauxite and recycling
The uncontaminated aluminum hydroxide crystals Al (OH)3. 3H2O are then heated in an increasingly heated furnace until the temperature is 1100o C, a factor that causes them to decompose and thus form alumina (Al2O3) and water.Since alumina is covalently bonded, the electrolysis process can only be achieved when presented in an ionic form. To realize this, the alumina is dissolved in an electrolyte, which in this case is a mixture formed from molten cryolite (Na3 AlF6) and fluorspar. This results
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Sir Walliam Ramsay
He had written number of articles on picoline and on the decomposed products of the quinine alkaloids. From the inception of eighties, he was actively involved in physical chemistry. His contributions towards chemistry, being the most rewarding contribution in terms of stoichiometry and thermodynamics are considered marvellous. It has helped him a lot for the investigations carried out with Sidney Young on the subject of evaporation and dissociation during the period of 1886-1889 besides his
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Techniques used in the separation and identification of chemical compound and their real world applications
The juice is then treated with chemicals to kill any fungi which is available in it. It is at this stage, where HPLC finds its use. This is because some of the chemicals always remain in the final product. In connection to this, HPLC is always used to determine, if there are any traces of the chemicals in the final sugar. If there are any, it is then taken back for treatment (Scoog &Holler, 1992).The main limitation of this technique is that it cannot be used for very complex chemical
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Biochemistry assignment
Other treatments include, Iodine-131 therapy and external radiotherapy. Follow up should be done so as to maintain adequate thyroxin therapy and to detect persistent or recurrent thyroid carcinoma (Schlumberger, 2000).Enzyme linked immunosorbent assay (ELISA) was used to measure levels of five serum proteins as formerly shown to be up regulated in papillary thyroid cancer, that is, angiopoietin-1 (Ang-1), cytokeratin 19 (CK-19) tissue inhibitor of metalloproteinase-1 (TIMP-1), galectin-3 and
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Personal profile about Roger Tsien who is biochemist
After pouring most of his free time towards experiments at his basement laboratory, he was able to win the Westinghouse talent search. His winning entry in the national prize completion was an investigation of how metals bind to thiocyanate (Tsien, 2014). On graduation from Livingston high school, he proceeded to Harvard University. In 1972, he emerged from the university with a bachelor of science in chemistry and physics. Having studied In Harvard University on a national merit scholarship,
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From cocoa bean to chocolate bar
During the process of fermentation the beans are supposed to be mixed slowly to introduce oxygen into the heap. The oxygen helps in turning alcohol into acetic and lactic acid (Belitz, Grosch & Schieberle, 2009). The liquid form of the pulp is usually drained from the heap, leaving the organic compounds of the beans to develop a new color and flavor that people usually associate with chocolate. After the fermentation process is over the temperature inside the heap is usually increased with the
Pages: 6 (1500 words), Essay
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Corrosion lab ( paraphrasing)
Stirrer was turned on, the current shot up a few mille-Amperes and then started depreciating even with the stirrer still on at a similar rate to when the stirrer was off. This caused the electrolyte solution to become more uniform for a short while, which improved the current circulation.The main effect of any form of corrosion is the deteriorative loss of a metal. These sentiments are echoed by Callister (2007), who defines corrosion as a process by which there is a deteriorative loss as a
Pages: 10 (2500 words), Essay
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Biochemistry Task4
Low temperatures reduce the reaction energy of an enzyme.Aldolase B act on F1P substrate, in catalyse the carbohydrates in mammals. Absence of the enzymes in the body of mammals leads adverse effects on the body of organisms due to build-up of F1P in the liver. The enzymes catalyse the F1P into glyceraldehyde in pathway that form glucose. High level of F1P in the body of mechanisms hinders enzymes metabolic process in an organism. F1P hinders glycolysis process thus leading to abnormal sweating
Pages: 4 (1000 words), Essay
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Fine Chemical Production
The ‘Big Four’— the People’s Construction Bank of China, the Agricultural Bank of China, the Bank of China, and the recently established Industrial and Commercial Bank of China (Hess 25).Institution building began in the initial reform period with the formation of a two-level banking structure. In 1995, central banking experienced a new push when a new policy on the PBoC was implemented that provided the central bank the legal structure to function under the headship of the State
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Pharmacokinetics of the seroteninergic anorectic agent, dexfenfluramine
Of dexfenfluramine is mainly through oral, inhalation routes and lesser extent intravenous infusion in compound called dexfenfluramine hydrochloride (C12H16F3N,HCl)1. Oral administration of compound under the name of ‘redux’ was in capsules enclosing white crystalline powder weighing 15mg. The oral route is favoured due to resistance of dexfenfluramine to acidic media in the stomach. In addition, the hydrophobic nature of the drug is favours diffusion through the gastro intestinal walls. In
Pages: 5 (1250 words), Essay
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Effect of electromagnetic radiation on human health
These produce high-intensity magnetic field. High frequencies are caused by antennas or radar. Previous studies used numerical techniques, for example, the studies of Gandhi et al. which induced current density in human body tissues by means of the impedance method (qtd. in Dughiero, Forzan and Sieni 1553).Electric and magnetic fields’ negative consequence on the human body vary due to different frequencies received. Reilly indicated that a low frequency of 100kHz can provide nervous
Pages: 8 (2000 words), Essay
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The use of Isotopes in medicine
In effect, the decay time is enough for the physicians to conduct any medical test.The use of the technetium-99 in the diagnosis of medical conditions has notable advantages, as well as, disadvantages. The property of technetium-99 as a pure gamma emitter is important in the analysis of the internal body parts. Gamma radiation produced by the isotope has energy levels that do not harm the human body (Roat-Malone, 2003). Hence, the radiations are safe and do not interfere with the normal
Pages: 4 (1000 words), Essay
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John Dalton's Atomic Theory
Next he also said that compounds are made up of atoms combining in a fixed ratio and lastly, he proposed that chemical reactions merely include the rearrangement of the constituent particles (Thompson, 1807).On a personal level, I think that Dalton’s work is truly pioneering and phenomenal since a simple evaporation of water instilled questions in his mind about the existence of smaller particles. One of the major drawbacks that can be seen in his experiments is that he bound himself to
Pages: 4 (1000 words), Essay
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