Chemistry Essays

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648 essays
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Aspirin

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The whole experiment has been risk assessed to ensure complete safety in the laboratory during the process of this experiment.

CV personal statement with 2 page to answer

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A) The sequence of these metabolites during glycolysis in yeast. Acidic conditions: glucose ? fructose 1, 6-bisphosphate fructose 1, 6-bisphosphate ? 2 glyceraldehyde 3-phosphate glyceraldehyde 3-phosphate ? 1, 3-bisphosphoglycerate 1, 3-bisphosphoglycerate ?

Synthesis of Dibenzalacetone by Aldol Condensation of Benzaldehyde and Acetone

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Aldol condensation proceeds via an addition reaction between an aldehyde and a ketone, resulting in the formation of an aldol. The aldol product undergoes dehydration to give an enone product. In the present experiment, benzaldehyde, an aldehyde, reacts with acetone, a ketone, to give dibenzalacetone.

Properties of Gases

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The experiment was meant to identify various gases by investigating their physical and chemical properties. Some chemical reactions or chemical decomposition reactions result in the production of gaseous products. For instance, hydrogen gas can be prepared in the laboratory through the reaction of a reactive metal and a strong acid.

What effect does the brightness of light have on the growth rate of a plant?

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Introduction Plants are important in the continuing existence of life, as it provides food for animals. What is interesting about plants is that they make their own food, and factors that may affect this can understandably deplete resources for the other functions of the plant, such as growth.

electrochemistry

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No matter how the transformation or change is generated or produced, the voltage will be produced because of the transforming or changing magnetic field strength, moving a magnet away or towards the coil. 2. What is a galvanic cell and how does it work? Galvanic cells collect the electrical energy present from the electron transmission in a redox response or reaction to carry out an important electrical work.

Case study on Biochemistry

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When the cycle is incomplete, and the product is not formed, the function of the organism cannot properly take place. Without enzymes, the reactions needed for biological processes of the body would take at a slower rate or fail to take place.

The cylindrospermopsin alkaloids

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Cylindrospermopsin is regarded as an important algae toxin which has been associated with contamination of surface water. CYN is chemically classified as a trycyclic alkaloid composed of a trycyclic guanidine moiety joined with hydroxymethyluracil (Masten 2000).

Customer Satisfaction and service quality in the Mobile Telecommunication Industry: A Case Study of MTN Nigeria

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Customer satisfaction describes the situation where the total percentage of people using a product expresses satisfaction to a certain product. Previous research has shown that customer’s attitudes have changed over the years with customers becoming more demanding and less tolerant in their expectations.

OXIDATION OF METHIONINE BY SINGLET OXYGEN

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(Herzberg, 1934). Over the past twenty five years significant increase in data regarding singlet oxygen has led to the recognition of its importance in organic chemistry, biochemistry and medicine. Singlet oxygen is an extremely reactive, nonradical, electrophilic molecule.

Influence of Drilling Fluid on oil Recovery in Homogenous Reservoirs

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Mining industries around the globe are under constant scrutiny as far as the treatment of contaminated water is concerned. There is mounting pressure for mining industries to adopt effective and advanced methods that are environmentally sustainable. Water management has often been the most challenging, as well as long term environmental liability.

Compressed Hydrogen Production Via Reaction Between Liquid Ammonia And Alkali Metal Hydride

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There are many methods that can lead to formation or production of hydrogen. The interest in this scope is the compressed form of hydrogen, otherwise known as liquid hydrogen. Ammonia .NH3 is recognized as one of the attractive hydrogen H2 carriers because it has a high hydrogen content of 18% mass and it is easily liquefied under about 1 MPa of pressure at a room temperature.

Q1./ Discuss how the primary, secondary and tertiary structure of a protein will influence the way in which it behaves when it a

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The formation of an emulsion necessitates a high input of energy and the presence of at least one emulsifier in the system in order to aid in reducing the interfacial tension between water molecules and oil molecules. Then, following the molecular adsorption, an interfacial layer at the surface of droplets forms and protects the newly formed droplets from phase separation and coalescence.

lowry assay

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Introduction and Aims The aim of protein assay is to understand how to draw a curve by using prepared solutions to establish the concentrations of unknown solutions of albumin using spectrophotometer. According to Senaratne, Park and Kim (2006), it helps to properly understand the difference between qualitative and quantitative testing.

Lipoprotein abnormalities associated with alzheimer's disease, diabetes, atherosclorosis

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Lipoproteins are separated into various categories on the basis of density at which they float through ultracentrifugation. These macromolecules are further categorized depending on electrophoretic ability, particle size or affinity chromatography. These specific classes have distinct metabolic functions.

Chemistry and Computer Science

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Moreover our cars and power generation units convert chemical energy in fuel to a more useable form. Chemistry has a deep relation to the computers and computer technology. The way we moved towards the more energy efficient electrical and electronic products depicts that generation after generation, the knowledge about the utilization of chemistry enhanced in huge amount.

COLOURIMETRY PARACETAMOL

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When monochromatic light goes through a coloured solution in a cell, a portion of the radiation is taken in and another fraction is transmitted. Colourimetry is a hands-on application of the Beer-Lambert law to establish the proportion of light that is transmitted by a solution containing a coloured solute, and using that information to ascertain the concentration of the solute.

Chemistry

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For example, most enzymes are sensitive to pH and temperature. The same is true for some catalysts such as manganese salts that are pH sensitive and heat sensitive, requiring controlled conditions to work.

Coral Reefs

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he ecosystem of the oceans (and throughout the world), how they are important to preserve, how they are being destroyed, and what can be done to slow/stop this destruction while at the same time engaging people with the need for change. Through such a discussion, it is the hope

Synthetic studies towards the marine natural product cylindrospermopsin the causative agent in freshwater toxic blooms

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The rapid increase in CYN producers in temperate zones is yielding concern on the impact of this toxin to human, as well as environmental risk and health risks across the contents. Since 2000, there are several studies that have demonstrated the capacity for Cylindrospermopsin (CYN) to bio-accummulate especially in freshwater organism.

Hydrogen bonding and drug designs

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Accurate prediction of the solubility of a compound during drug screening may immensely help the pharmacological industry by assisting in the selection of the right drug candidate that is sufficiently soluble and bioavailable.2 Thus, a number of computational and theoretical models have been proposed to predict the solubility of a compound.

HPLC analysis of caffeine and benzoic acid in diet coke

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If the manufacturers do not comply with the additive legislation, then action should be taken against them to protect the consumers because it is their right. Additionally, people should be educated on the effects of high intake of beverages that contain caffeine and benzoic acid.

E-commerce and Its Importance in Business

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Almost, all the sectors including finance, retail and communication segments of businesses are enormously being affected by e-commerce activities. In other words, it can broadly be stated that e-commerce has dramatically changed the business modes by a significant level.

Thermoplastic Copolyester nancomposites for biomedical applications

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Nanocomposites are polymers containing particles in the matrix that possess at least one dimension of the dispersed particles in the nanometer range (

Heat and the Kinetic theory of matter

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In the latter literature presented therein, we would fundamentally look into various methods and definitions employed to exactly what heat and temperature are with regards to the kinetic theory of matter and how they particularly influence this law.

The function and mechanism of AlkB.

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Investigations on crystal structure and mechanism of AlkB have involved the use of both native and recombinant protein. Recombinant enzyme, entire as well as truncated form is produced through homologous expression; the former cloned in pET21b vector and expressed in BL21 (DES) competent cells; while the latter cloned in pET30a vector and expressed in BL21 competent cells.

investigating the effects of mutation on active site amino acids of beta-lactamase

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Generally, there are two ways of producing modified proteins. Usually, turns and loops are the first areas of interest while considering engineering of new binding sites. Modifications are done either by creating new binding sites introducing random mutations on the surface of strands, helices or randomization of already existing regions that connect secondary structures.

Fires in Underground Transport Systems

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The purpose of this research is to investigate the following: Description of Major Incidents such as King’s Cross fire, Kaprun fire disaster and 1995 Baku Metro fire; A critical analysis on chemical explosions (or fires); Toulouse chemical explosion; Consequences of explosions and a critical appraisal of the discussion.

Nano-Thermal Analysis

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since during the manufacturing of the drug various factors such as change in temperature and moisture can alter its toxicity, actions, kinetics and dynamics as well.(Giron,2002).To understand the solid state properties and the key to efficient characterization of the compound is to formulate a strategic technique and elaborate analytical programs that enables us to understand the chemical, structural, energetic and physical states of the compound.(Lee,2003) Fundamental properties that need to be analyzed in a solid dosage form Test Method/ function Characterization Fundamental properties 1) UV spectroscopy Simple assay 2) Solubility Phase solubility/ purity 3) Melting point DSC-polymorphism

Chemistry and the Environment

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(1) Describe the general properties of the atmosphere known as troposphere, stratosphere and the ionosphere. Describe the composition of unpolluted air at sea level. The unpolluted air or atmosphere at sea level is chiefly made of gases kept in place by the effect of Earth’s gravity at an average temperature of about 14 C.

therapeutic polysacchraides

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In simple terms, it can be said that sugars, starches, cellulose and several other compounds present in the living organisms are carbohydrates. These compounds are classified based on their chemical structure into monosaccharides, disaccharide, oligosaccharides and polysaccharides (Zamora, 2011).

Therapeutic polysacchraides

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Because of their unique composition and structure, the important role that polysaccharides will play in the future of research is undeniable. On a fundamental level, polyssarcharides are defined as polymeric chains composed of mono- or di-saccharides bound together by glycosidic bonds, a special type of covalent bond.

The affects of Agent orange

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The name comes from the orange stripe used to label the barrels containing the chemical. Comparing to other “Rainbow chemicals”, Agent Orange was the most extensively used. Being a herbicide, the compound was employed in the United States, Korea, Canada, Australia and Brazil (Hay 151).

Supramolecular Polymers based on Hydrogen Bonding

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This paper discusses supramolecular polymers in general and hydrogen-bonded supramolecular polymers in particular. Molecular recognition, mechanism of polymerization and self-assembly processes of supramolecular polymers are also reviewed. This paper also provides a brief overview of their rheology and applications.

Ecosystem Toxic Chemical Threat

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According to World Meteorological Organization, there was almost a 30% increase in the Earth’s atmosphere in a span of two decades. It is important to discuss this greenhouse gases and its environmental effects as most anthropomorphic activities produce these gases.

Impact of Reservoirs in the UK on the Surrounding Community

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The paper aims to gain a proper understanding of reservoirs and their function in the society in order to better appreciate the literature relating to the impact of reservoirs in the UK on the surrounding community. This will allow for a better grasp of the issues relating to their impact on communities in which they are built and to which they supply water for drinking and household activities.

New Malaria Vaccine

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Hence all efforts must be channeled to find a robust vaccine for preventing it. Hence, research in this area is going at an intense pace in recent years. But unfortunately, there are no foolproof vaccines that have been formulated yet. A vaccine by name RTS S/AS01, which was put to trial during 2009, is specifically addressed to vulnerable children in the Third World.

Nuclear Power: Pros and Cons

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These events have unfortunately created misconceptions about nuclear power, which highlight more on perceived disadvantages than its benefits. This paper is a critical examination of nuclear energy focusing on its advantages and disadvantages in relation to other sources of energy.

Chemistry - Fluoridation of Water

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Many western countries such as USA, Australia, New Zealand, and Singapore, even some part of Europe have adopted fluoridation method to greater extent. Also, some Asian countries such as India, China have high concentration natural sources of fluoride in the water.

Carbohydrates

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Strong covalent and hydrogen bonds join the atoms within their structures. Carbohydrates comprise of a wide range of substances broadly distributed and available in nature. In plants, carbohydrates account to over 75% of the dry weight, which is mainly in form of lignin, cellulose and starch (Pigman, 63).

Altering the Caloric/Fat Content of Food

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The caloric content of food is thus altered through the use of heat in a series of reactions. The reactions that occur can either release amount of heat or can absorb it in form of energy (Kotz, Treichel & Townsend 214). Furthermore, this event can cause the matter to change in form from one state by either melting to boiling.

How Gas Laws Apply In the Health Care Industry?

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Gas laws play a significant role in everyday life. The laws have a significant influence on the lives of living organisms. The atmospheric pressure, respiratory system of living organisms, etc all work according to the ideas detailed in the gas laws. Under an uncontrollable condition, gas a high-pressurized gas can be as dangerous as a nothing in the world.

Processing-structure-property relationships in (TPE-E) nanocomposites

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The many improvements in materials properties include electrical conductivity, toughness, optical properties, shear and bulk modulus, film scratch resistance, yield strength and many more. The addition of nanofillers such as carbon black to rubbery polymers has a great effect upon the properties of such materials and only very small amounts of nanoparticles are dispersed in the polymer matrix (Dzenis 2004).

Cylyndrospermospis (CYN) Algae

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Such toxicity hazards from seafood are recognized internationally when they are from marine algae (diatoms and dinoflagellates), but nowadays few risk assessments for Cylindrospermopsin in seafood have been conducted. This paper estimates the risk from Cylindrospermopsin contaminated seafood, and provides strategies for safe human consumption.

Analytical technique: Mass spectrometry

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Theories There are three important steps in mass spectrometry. First, the compound is converted into cations by loss of an electron. These ions are produced by driving a high energy beam of electrons, which displaces the electrons from the compound. Sometimes, cations split further into neutral fragments and smaller cations.

The use of free radicals in the treatment of disease

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A free radical can be defined as a particle with at least one unpaired electron occupying the outermost shell, capable to exist independently (Karlsson, 1997). In other words, there is at least one electron without a pair. The presence of unpaired electrons usually makes free radicals highly reactive.

The second part X-ray Diffraction (XRD) Powder X-ray

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The second part X-ray Diffraction (XRD) Powder X-ray. Powder X-ray diffraction is among the primary methods, which are used by solid-state chemists and mineralogists to examine physic-chemical build-up of solids, which are unknown to them. The data is denoted in a group of single-phase X-ray powder diffraction forms of three strong D values in table form (Khan 24).

The effects of alcohol abuse or binge drinking on a diagnotic imaging department

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fects on the functioning of a hospital department. Directly, intoxicated patients may be difficult to manage or intoxication may confound some of the results obtained. Indirectly, workload may be increased as alcohol contributes to the prevalence of injuries.

Component of chromium

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It has been known by human since 1790’s found in mineral crocoite (PbCrO4). Its name is derived from Greek word “Chromos” meaning color, because of many beautifully colored compound and complexes it form. Chromium (0) is lustrous, shiny and hard metal.

Research Methodology - Research Findings of Etisalat Telecorporation and the result

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Emirates Telecommunications Corporation – Etisalat has adopted as a strategy of outsourcing information technology in order to gain competitive edged in the telecommunications market in UAE and the Middle-East. A research study has been carried out to find the relationship of outsourcing of IT adopted as a strategic initiative and the profitability and sustainability of Emirates Telecommunications Corporation – Etisalatm (Henry, 2008, p.17).
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