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    Kevlor History

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    Kevlor A synthetic material which has high tensile strength and used in manufacturing of tires and also as a reinforcement agent in manufacturing of protective parts like helmet etc…, HISTORY In 1930’s a chemical company called DuPont prepared commercially succeful super polyamide. Actually in 1964 Stephanie kwolek discovered kevlor in DuPont laboratory while doing research on the high performance chemical compounds. Kevlor is patented Stephanie kwolek in 1966 which is used by many police…

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    Brachiopod Essay

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    Brachiopods within the fossil record have many uses to help inform us about past seawater evolution. As they were one of the earliest animals after the Cambrian explosion to develop a hard skeleton, they have a strong presence in the fossil record throughout geologic time and are the subject of one of the preferred methods used for deep time isotopes. As the calcite within the hard shell of a brachiopod precipitates out of the surrounding seawater, trace elements are recorded within the shell,…

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    Common Core Task: Argumentative Essay Synthetics or Real Diamonds “Shine bright like a diamond.” Diamonds have been used for engagement rings for a long time. The diamonds are difficult to find which, shows the importance of them. But, their are also, synthetic diamonds which, are man-made in a lab. Instead, of diamonds that take years to make. In the article, Engineered Diamonds it states,” Diamond is the hardest naturally occurring material found on Earth.” So, real…

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    This experiment was performed in order to demonstrate the principles of nitration through electrophilic aromatic substitution. It also examined the effects of bromine on an aromatic ring, ortho-para vs. meso directing. The second experiment was performed to compare the reaction rates of electrophilic aromatic bromination with different arenes. Data and Results In the gas chromatogram, there are two large peaks. The first peak at 0.653 minutes with an area of 133,352 uV per second, 31.95% of…

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    Carbohydrates

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    Carbohydrates have the following basic composition. They are molecular compounds made from three elements: carbon, hydrogen and oxygen. Monosaccharides are simple sugars with multiple OH groups. Based on number of carbons 3, 4, 5, 6, a monosaccharide is a triose, tetrose, pentose or hexose respectively. Disaccharides are condensation products of two monosaccharide units; examples are maltose and sucrose. A disaccharide is 2 monosaccharides covalently linked molecule. Polysaccharides are polymers…

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    Magnesium Essay

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    2.4.1 Magnesium Properties Magnesium is the essential to human body and naturally it is found in bone and it is the fourth cation in human body. Magnesium is a lightweight metal with a density of 1.74 g/cm3. The fracture toughness of magnesium are greater than the ceramic materials such as hydroxyapatite. Elastic modulus and compressive yield strength of magnesium are similarly to human bone. The disadvantages of magnesium is it has low corrosion resistance and stimulatory effects on the growth…

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    Measurement of glutathione Glutathione (GSH) is a ubiquitous tripeptide which serves several vital functions including detoxifying electrophiles, scavenging free radicals and providing a reservoir for cysteine. The sulfhydryl group of GSH reduces 5-5'-dithiobis (2-nitrobenzoic acid) (DTNB) and form the yellow colour product 5-thio-2-nitrobenzoic acid (TNB)21. Measurement of the absorbance of TNB at 412 nm provides an accurate estimation of GSH in the sample. Figure 7. Materials 5×105 cells/mL…

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    fossil fuels because it is inorganic and does not contain any carbon (NMOGA 2015). This applies pressure to the plants and animals as well as heating temperatures ranging 150-300 degrees Fahrenheit (NMOGA 2015). After millions of years the deceased plants and animals transform from their organic state to hydrocarbons (NMOGA 2015).…

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    The coal mining industry in the late 1800s, especially in Colorado, was a rapidly growing industry. As fossil fuel technologies expanded, life became increasingly dependent on fossil fuels, and as a result, people became more reliant on coal as an energy source. However, without the introduction of the railroad, coal would have remained just a minor industry (Andrews 2008, 54). These railways made it possible to connect the coal production areas with the markets, and thus possible to bring coal…

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    Phase Diagram and Phase Transformation Fig. 1 shows (FCC) Nickel-(BCC) Chromium binary phase diagram. The eutectic reaction takes place at 1345°C and the composition is 51% Cr and 49% Ni. The solid solubility of Cr in Ni is extensive which is evident from the phase diagram. Phase transformations of two Ni-Cr alloys are explained below. One is Ni40Cr60 (Line 2) which is closer to eutectic composition and contains greater % Cr and the other alloy is Ni68Cr32 (Line 1) which contains greater % Ni.…

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