Catalysis

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    Catechol Oxidase

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    There are factors that can affect the enzymatic activity. Enzymes are known to speed up the biological reactions. It is specific to its substrate which in this experiment is known to be catechol. The catechol oxidase is used in all parts to express the concentration in the enzyme reacting into ortho-quinone (Schultz, 2006). The catechol oxidase if from the potato that was used in this experiment. The enzyme was extracted as the full strength after centrifugation and used the homogenization as…

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    Temperature and pH will affect enzyme function by increasing the reaction rate because as temperature increase so is the rate of reaction and extremely high or low pH will result in the denatured by decreasing the reaction rate. The function of this experiment was to investigate the influence of the concentration of enzyme on the rate of reaction. The rate of reaction in this experiment was subjected by the amount of Guaiacol, H2O2, Extracts, and Buffer (pH5). The reaction rates with different…

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    Table 3 shows the BET surface area of both the fresh and hydrothermally aged SCR catalysts. For fresh BEA zeolite and SCR catalysts, as the doping amount of catalytic additive increases, the BET surface area decreases, probably because the additive Cu, Ce, and Nb species blocked some of the zeolite channel, hindering the entry of N2 into the pores (Bin et al. 2014). After aging at 600 °C, all the samples showed 3-20 m2/g increased BET surface area. Aging condition of 600 °C is a relatively mild…

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    The kinetics of the reaction between peroxomonosulphate with Lactic acid was studied in the presence of Mn(II) at alkaline pH. The reaction followed first order with respect to peroxomonosulphate. The rate of the reaction was studied under pseudo first order condition and found to increases with the [Mn(II)] and lactic acid. Thermodynamic parameters were calculated and reported. Based on the results a rate equation, kinetic scheme and a most probable mechanism has been predicted. Keywords: Alpha…

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    Km and Vmax determination of glucocerebrosidase towards p-NPG The Michaelis constant (Km) is a measure of the affinity of the enzyme towards the substrate, with smaller values representing greater affinity. Km and the maximum rate (Vmax) of leukocyte GCase were obtained through the Lineweaver-Burk plot (Figure 4) with artificial substrate p-NPG in concentrations from 0.71 mM to2.50 mM. Km and Vmax values for leukocyte GCase using p-NPG as substrate was found to be 12.6 mM and 333 U/mg…

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    Introduction Enzymes are catalysts that speed up chemical reactions without being used up in the process. Enzymes are able to do this by bringing two substrates together and having them bind to the enzyme itself. This allows the enzyme to lower the activation energy required to start the chemical reaction by forcing the substrates into an unstable transition state. In order to make sure the substrates fit, enzymes are able to mold their half-moon shape to fit around the substrates.…

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    Single-component aromatic flavoprotein hydroxylase. Several single-component aromatic flavoprotein hydroxylases have been studied comprehensively such as p-hydroxybenzoate hydroxylase (8), phenol hydroxylase (9), 2-methyl-3-hydroxypyridine-5-carboxylic acid monooxygenase (10), salicylate hydroxylase (11), anthranilate hydroxylase (12), melilolate hydroxylase (13). Generally, the catalytic cycles of these enzymes follow the reaction shown in Scheme 3. The reaction is composed of two parts: the…

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    Acid base balance is a part of homeostasis for maintaining the pH of the body. It is necessary for the functioning of enzymes and structural integrity of proteins. In case of an unacceptably large variation in the pH of the body, the enzymes lose their normal function, the proteins get denatured, and in extreme cases, death might result. The normal pH of human blood is 7.4, the acceptable range being 7.35-7.45. In the…

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    The hypothesis of the experiment was that the molecular weight of N-acetyl-β-D-hexosaminidase would be around 28,000 kDa but to determine the molecular weight the concept of SDS-PAGE had to be understood. The movement of any charged particle through an electric field is determined by its net charge, its molecular radius and the magnitude of the applied field (7). Being that natively folded proteins are not molecular weight dependent, the proteins would be traveling at different speeds in an…

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    Lysosomes Research Paper

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    Describe the structure and function of a lysosome. Lysosomes are a cell organelle, translating as an independent structure within a cell, possessing a specific structure and function. For a lysosome its functions include; digestion of intracellular or extracellular material, nutrition from digested macromolecules and defence/protection from harmful substances. Lysosomes are variable from cell to cell in terms of shape and size but are conventionally spherical or oval shaped, 0.5µm in diameter…

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