Free Chemistry Essay Examples and Topics | Page 23

The Stress-Strain Curve of Polymers under the Effect of Tensile Loading Chemistry Essay

4 pages (1110 words) , Download 2 , Essay

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The experiment was conducted with the objective of analyzing the stress-strain curve of polymers under the effect of tensile loading (i.e. tensile force application). The testing was done on four different specimens: PE (polyethylene – from a shopping bag), PP (polypropylene – from a plastic folder), Rubber (natural rubber – from a rubber band), and Acetate.

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Altering the Caloric/Fat Content of Food Chemistry Term Paper

5 pages (1250 words) , Download 2 , Term Paper

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.

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Identify Mystery Liquid Chemistry Essay

3 pages (750 words) , Download 2 , Essay

Red cabbage juice contains a pigment known as anthocyanin which is responsible for the color change. Objectives: Determine and analyze the pH values for different household liquids. Compare the liquids utilities to their chemical constituent. Materials: Red cabbage Beaker Tongs 96-well microplate Microtip pipets (3) Toothpicks Distilled water Piece of white paper Hot plate 100-mL beakers (2) 100-mL graduated cylinder Solutions: Lemon juice Anti-freeze Drain Cleaner Safety Precautions: 1.

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Synthetic Studies Chemistry Literature review

4 pages (1862 words) , Download 2 , Literature review

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Since 2000, there are several studies that have demonstrated the capacity for Cylindrospermopsin (CYN) to bio-accumulate especially in freshwater organisms. This report synthesizes the current information on Cylindrospermopsin accumulation embracing information on the global distribution of Cylindrospermopsin (CYN) producers and summing up of Cylindrospermopsin ecological and human effects.

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Processing Structure Property Relationships in (TPE-E) Nanocomposites Chemistry Lab Report

4 pages (1426 words) , Download 2 , Lab Report

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There is a significant amount of polymers that the produced modified organoclays can be blended with. Modified organoclays are known to be highly dispersible in both polar and non-polar polymers. However, we will use only Polyester TPE of three different grades. This area of research is extremely promising because such systems possess higher dispersion than conventional organoclays do.

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Calcium Element Chemistry Research Paper Chemistry Research Paper

3 pages (750 words) , Download 2 , Research Paper

(Earnshaw and Greenwood, p. 109) It has been known since ancient times in its carbonate form as limestone, from which the Romans produced lime, called calyx in Latin. (Helmenstine, p. 1)The metal form of calcium was discovered by the English scientist Sir Humphrey Davy, in his laboratory in London in 1808.

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Low density polyethylene Chemistry Research Paper

5 pages (1250 words) , Download 2 , Research Paper

ICI had employed the process of autoclave when they first commercialized the process in 1938. The tubular process was first invented by BASF in 1938 though it took another 15 years to commercialize the production processes. Cost reduction and product enhancement has been the goal of each manufacturer over the years.

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Adsorption/desorption of Chlorohexidine (CHX) on Flax and Cotton fibers Chemistry Literature review

4 pages (1000 words) , Download 2 , Literature review

CHX is more soluble in ethanol however; ethanol is too volatile and reactive so that 50:50 ethanol-water mixture was used as CHX solvent. One milligram CHX per milliliter solvent was prepared. This was done by measuring 0.1 mg CHX in a 100 ml volumetric flask, filling the flask to the mark with the solvent, and shaking it until CHX was completely dissolved.

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Xray Crystallography Chemistry Research Paper

5 pages (1250 words) , Download 2 , Research Paper

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X-ray Crystallography. Prior to the discovery of X-rays in 1895 (Nelson), the general concept about the crystals was that these consist of an orderly arrangement of atom, ions or molecules. As there was no definite clue, only a general imaginary concept about these crystals prevailed.

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Heat and the Kinetic theory of matter Chemistry Essay

4 pages (1000 words) , Download 2 , Essay

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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.

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Sphingomyelinase Chemistry Essay

5 pages (1250 words) , Download 2 , Essay

Generally enzymes are classified into six different groups; oxidoreductases, transferases, hydrolases, lyases, isomerases and ligases. Sphingomyelinases (SMase) are hydrolytic enzymes that catalyze the conversion of sphingomyelin, which is also known as ceramide phosphorylcholine into ceramide and phosphorylcholine (Goni and Alonso 38).

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Emulsion Technology Chemistry Lab Report

8 pages (2000 words) , Download 3 , Lab Report

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The report discusses the effect of surfactants and also investigates the idea of blending two surfactants, Span 80 and Tween 80. Furthermore, the report also covers the spectrophotometric analysis to determine the preservative actions of benzoic acid, methyl parabens and propyl parabens and also the supportive action of propylene glycol as a preservative.

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Nano-Thermal Analysis Chemistry Essay

4 pages (1000 words) , Download 2 , Essay

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

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The Element Nitrogen Chemistry Research Paper

5 pages (1250 words) , Download 2 , Research Paper

He places a bottle that is turned upside down in a water bath so as to trap some air. A burning candle was placed inside the bottle that reacts with oxygen. Rutherford concluded that the remaining gas was nitrogen. Nitrogen comes from nitro and gen that means niter-forming.

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Properties of Gases Chemistry Lab Report

7 pages (1750 words) , Download 6 , Lab Report

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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.

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Drug Designing with the Aid of Computers Chemistry Essay

9 pages (2250 words) , Download 3 , Essay

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They have given the meaning to life that did not exist prior to them. This was mainly because computing devices possess extremely fast calculating capabilities and imaging mechanisms as a result of which analysis of data has now become possible that could not have even been thought of before the advent of computers.

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New Malaria Vaccine Chemistry Research Paper

5 pages (1310 words) , Download 2 , Research Paper

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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 the name RTS S/AS01, which was put to trial in 2009, is specifically addressed to vulnerable children in the Third World.

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The analysis of thymine and its derivatives by electron-ionisation and chemical-ionisation mass spectrometry Chemistry Essay

4 pages (1000 words) , Download 2 , Essay

Thymine is also connected in transmission of genetic information as it is an integral part of DNA. Thymine is a heterocyclic organic compound. It contains a nitrogen atom as part of an aromatic ring. Characteristic properties of heterocyclic compound are therefore seen with analysis of Thymine.

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Synthesis of Dibenzalacetone by Aldol Condensation of Benzaldehyde and Acetone Chemistry Lab Report

7 pages (1750 words) , Download 4 , Lab Report

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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.

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Chemistry as the Science of Atoms and Molecules Chemistry Essay

3 pages (921 words) , Download 26 , Essay

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Chemistry can be divided into branches according to either the substances studied or the types of study conducted. Based on the substances studied, it is ramified into organic chemistry and inorganic chemistry. Considering the second-way chemistry is divided into physical chemistry and analytical chemistry.

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Does the amout of Solution effect the Crystalization of Copper Sulfate Chemistry Research Paper

5 pages (1250 words) , Download 2 , Research Paper

The hypothesis to verified in this experiment can be stated as; Increase in concentration result in increase in the rate crystallization In this experiment, copper sulfate solutions with varying concentration are used to see whether there is a relationship between concentration and the rate of crystallization.

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Separation of Mixtures of Solids Chemistry Lab Report

2 pages (673 words) , Download 3 , Lab Report

Although the principle is the same, I feel that my proposed flowchart poses some disadvantages as that compared to the instructions. First, boiling water may have corrosive effects on the iron, making them weak enough to break into pieces that may contaminate the sand that will remain after all the separation techniques.

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Ballast Tank Weld Repair Chemistry Assignment

7 pages (2079 words) , Download 2 , Assignment

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Mechanical cleaning to St 3 is acceptable on block joints and damages to the applied coating system. Any visible salt contamination, oil, grease, dust, weld smoke, or dirt on the shop is to be primed or the other surface is coated; the chloride content on surfaces to be coated shall be within the limit set by the coating manufacturer.

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Clonidine/Quinapril Chemistry Essay

6 pages (1500 words) , Download 2 , Essay

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Clonidine is metabolized by the liver and degrades into four main metabolites when exiting the body in the urine. Currently, only p-hydroxyclonidine is identified by clinical research as present in the urine as a byproduct of the degradation reaction of Clonidine in patients. (DrugBank, 2011)

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Processing Petroleum Chemistry Essay

7 pages (1903 words) , Download 2 , Essay

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Once crude oil is extracted it is itself a mixture of various lighter factions of organic liquids. The composition of crude oil varies from location to location through the change is not highly significant. The commonest factions that compose crude oil are generally alkanes, cycloalkanes, aromatic hydrocarbons, and other organic compounds that are constituted from sulfur.

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The rough and tough of organics Chemistry Research Paper

3 pages (750 words) , Download 2 , Research Paper

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A few years ago, organic food was typically found in local farmer markets and fresh stores but now it can be found almost all major supermarkets. Research shows that more and more consumers are tended to purchase organic food.

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Therapeutic Polysaccharides Chemistry Essay

8 pages (2000 words) , Download 2 , Essay

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The author explains that 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. Carbohydrates possess a hemiacetal group that contains a reactive anomeric carbon that readily reacts in certain low pH cellular environments.

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Photochemical Somog Chemistry Assignment

3 pages (750 words) , Download 2 , Assignment

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An interesting issue is the development of photochemical smog – a question that has been considered by a number of scientists. To gain a better insight into this matter I will seek to discuss the chemical reactions causing the formation of such a hazardous condition.

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Therapeutic Polysaccharaides Chemistry Essay

7 pages (2195 words) , Download 3 , Essay

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These compounds are classified based on their chemical structure into monosaccharides, disaccharides, oligosaccharides, and polysaccharides. Apart from the fact that carbohydrates are energy bundles in the form of glucose, recent studies have identified several therapeutic benefits, especially among the higher polysaccharides.

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How do we identify trends in physical properties Ionic Compounds Chemistry Lab Report

4 pages (1000 words) , Download 2 , Lab Report

On the atomic level, there is a more complete transference of electrons than might be seen with covalent unions. Electrons themselves can be permanently assigned to orbit whichever atom needed to achieve a balance of charges. Metallic elements combined with non-metallics, as a generalization.

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Thermoplastic Copolyester Nancomposites for Biomedical Applications Chemistry Research Proposal

6 pages (2050 words) , Download 3 , Research Proposal

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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 (<100 nm), and these materials have been demonstrated to have unique, versatile, and superior mechanical properties as well as commercially viable cost ranges compared to original polymer/filler composites.

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A harmful impact of acid rain Chemistry Research Paper

5 pages (1250 words) , Download 3 , Research Paper

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: Acid Rain “Acid rain is a worldwide environmental issue that has seriously destroyed forest ecosystems” (Liu et al). When rain water consists of excessive acid content, we call it as acid rain. The development of industries, power plants and the increased use of automobiles have polluted the atmosphere immensely and as a result of that the normal structure of the atmosphere has been changed a lot.

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Griffith's theory of fracture Chemistry Coursework

4 pages (1000 words) , Download 2 , Coursework

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When stress is applied, ions slide past each other then goes to different directions; ions of the same charge bumps and trying to repel each other; causing the atoms to spread. The material then breaks. In metals, the atomic structure consist more positively charged ions on a flow of negatively charge electrons.

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Magnesium analytical methods Chemistry Essay

25 pages (6250 words) , Download 2 , Essay

In order to better understand magnesium and its interactions, it is important to examine fundamental of the element that have been previously pioneered. This knowledge sets the stage for application of contemporary techniques to produce new and exciting results in magnesium analysis.

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Arsenic and Mercury Exposure Chemistry Essay

1 pages (250 words) , Download 2 , Essay

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As per (Arnold,2011)“Exposure to even small amounts of mercury over a long period may cause negative health effects including damage to the brain, kidney, lungs, and the developing fetus”.

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The action of a competitive inhibitor to that of a non-competitive enzyme inhibitor Chemistry Essay

2 pages (500 words) , Download 4 , Essay

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Enzymes lower the activation energy of the chemical reactions and thus accelerate the chemical reactions, for example oxidoreductases, transferases and hydrolases etc. On the other hand an inhibitor is a substance which binds to the enzyme and lowers the activity of enzyme.

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Tin Melting Experiment Chemistry Lab Report

2 pages (500 words) , Download 2 , Lab Report

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The author states that to keep the sample from getting oxidized, nitrogen was introduced into the furnace while it was made sure, that no oxygen entered it. Tin’s melting point was virtually determined through its transition from solid to a molten state. Tin was then shifted into a coffee can. The sand was already there in the can.

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Toxic in Homes Chemistry Essay

1 pages (612 words) , Download 3 , Essay

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Water-based products are available even in regular stores, and benzyl alcohol is a safer substitute for methylene chloride products. 9 There is no lack of safer alternatives as they have existed in the market for several years. 10 What is lacking is the drive of the consumers and the legislative system to ensure that people only use safe products.

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TLC Practical: Identifying Unknown Metal Ions Using TLC Chemistry Essay

3 pages (750 words) , Download 2 , Essay

Compared to paper chromatography, TLC is faster and offers better separation characteristics between the analytes or the chemicals being analyzed. TLC chromatography technique is a rapid and effective method to detect the presence of chemical substances and identify them with the help of standards.

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Research Methodology - Research Findings of Etisalat Telecorporation Chemistry Dissertation

14 pages (3843 words) , Download 5 , Dissertation

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Emirates Telecommunications Corporation – Etisalat has adopted a strategy of outsourcing information technology to gain a competitive edged in the telecommunications market in UAE and the Middle East. A research study has been carried out to find the relationship between outsourcing of IT adopted as a strategic initiative and profitability.

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Cylyndrospermospis (CYN) Algae Chemistry Essay

18 pages (4903 words) , Download 2 , Essay

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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.

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E-commerce and Its Importance in Business Chemistry Dissertation

12 pages (3929 words) , Download 4 , Dissertation

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Almost, all the sectors including finance, retail, and communication segments of businesses are enormously being affected by e-commerce activities. It can broadly be stated that e-commerce has dramatically changed business modes by a significant level. With the increase in the number of internet users, the popularity of e-commerce has been significantly increased to a greater extent.

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Phrmaceutical Formulation Chemistry Essay

12 pages (3000 words) , Download 2 , Essay

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An emerging technology in the field of pharmaceutical in which prescription is passed through the lungs by the process of inhalation and enters the bloodstream through alveolar epithelium is known as pulmonary drug delivery. With its high efficiency it has proved very useful in today’s medical procedures as it provides an alternative method which seems to be cheaper and acceptable by patients as the risk involved with it is very minimal.

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Influence of Drilling Fluid on oil Recovery in Homogenous Reservoirs Chemistry Essay

11 pages (2750 words) , Download 3 , Essay

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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.

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EQ Industrial Services (EQIS) Plant Explosion Chemistry Research Paper

11 pages (2750 words) , Download 3 , Research Paper

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Introduction Reports on 6th October reveal that the EQ Industrial Services plant located at Apex, a suburb of Raleigh in North Carolina, suffered a big chemical explosion attack. The explosion was preceded by fire followed by additional number of explosions that caused air contamination due to the toxic fumes that were emitted from chlorine.

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Quantum and Thermochemical Structure Chemistry Assignment

4 pages (1101 words) , Download 2 , Assignment

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Rearranging equation 2 would result in a linear equation where energy would be y and frequency would be x with k2 as slope and -k1 as the y-intercept. Because of this, the energy calculated was plotted against the respective frequency. Linear regression was done which resulted in a fit with an R2 equal to 0.9632.

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The Cylindrospermopsin Alkaloids Chemistry Literature review

11 pages (3105 words) , Download 3 , Literature review

Cylindrospermopsin is regarded as an important algae toxin that has been associated with the contamination of surface water. CYN is chemically classified as a tricyclic alkaloid composed of a tricyclic guanidine moiety joined with hydroxymethyluracil. CYN is a natural toxin that is usually produced by certain species majorly Cylindrospermopsin raciborskii and Umezakia natans among others.

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OXIDATION OF METHIONINE BY SINGLET OXYGEN Chemistry Essay

41 pages (10250 words) , Download 2 , Essay

Table of Contents Abstract 2 Introduction 3 Singlet and triplet oxygen 4 Formation of singlet oxygen 6 Type I and Type II oxidation pathways 8 Photosensitizers 10 Aromatic hydrocarbons and organic dyes 10 Phthalocyanines, porphyrins and other tetrapyroles 14

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Nuclear generators Chemistry Term Paper

3 pages (750 words) , Download 2 , Term Paper

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Morpholins anti-cancer drugs Chemistry Dissertation

13 pages (3250 words) , Download 2 , Dissertation

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The target series of compounds was produced through reductive amination between four amines and a dialdehyde produced from α-D-glucopyranose. The amines that were used in the project are: butyl amine, benzyl amine, L-phenylalanine and Tyrosine-OMe.

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