During this experiment‚ the method of Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE) was conducted using a negatively charged protein and pre-stained molecular weight markers. The hypothesis was that the molecular weight of N-acetyl-β-D-hexosaminidase B would be 28‚000 kDa. To confirm or reject the hypothesis‚ the molecular weight of N-acetyl-β-D-hexosaminidase B and the concentration of protein had to be determined. The electrophoresis of the protein gel were conducted using
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V. Kumar Dean Sri Chaitanya Educational Institutions Hyderabad Chemistry - Ist year Chapter-wise Weightage of Marks Name of the Chapter Atomic Structure Periodic classification of elements Chemical bonding States of matter Stoichiometry Hydrogen and its compounds IA and IIA groups IIIA group IVA group Noble gases Environmental chemistry Organic chemistry Marks Weightage 8 8 8 6 6 6 6 4 4 4 4 12 Type of Questions 1 LAQ (or) 2 SAQ (or) 1 SAQ & 2VSAQ 1 LAQ (or) 1 SAQ & 2 VSAQ 1 LAQ (or) 1 SAQ &
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reaction arrow as on the products side. Details on balancing chemical equations are found in the units on Stoichiometry and Redox Reactions. The general format for writing a chemical equation can be written in a short-hand version as a A + b B + … → c C + d D + … where the lower case letters are the stoichiometric coefficients needed to balance a specific equation. The units on Stoichiometry‚ Redox Reactions‚ and Acid-Base Chemistry contain additional background reading‚ example problems‚ and
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Within the thylakoid membranes of the chloroplast‚ are two photosystems. Photosystem I optimally absorbs photons of a wavelength of 700 nm. Photosystem II optimally absorbs photons of a wavelength of 680 nm. The numbers indicate the order in which the photosystems were discovered‚ not the order of electron transfer. Under normal conditions electrons flow from PSII through cytochrome bf (a membrane bound protein analogous to Complex III of the mitochondrial electron transport chain) to PSI. Photosystem
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Analysis of Commercial Vitamin C Tablets Aim: To employ iodometric titration to determine the content of vitamin C in commercial tablets using volumetric analysis and compares it with the manufacturersÂ’ specifications. Introduction Vitamin C is an essential substance for maintaining good health and it is proved to be the agent which prevents scurvy. Most animals can synthesize their own vitamin C‚ but some‚ such as human cannot. Owing to the increasing concern for oneÂ’s health
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Battle et al [ ] concluded TN to be 278 ± 5 K from Massbauer and neutron diffraction studies on 57Fe doped SrMnO3 which value of TN was expected to be little different from that for undoped one. The variation of electrical conductivity with oxygen stoichiometry and the correlation of high temperature stability with structure were also reported by Battle et al [ ] besides others [ ‚ ]. The results of this synthesis and XRD characterization as well as measurement of SrO activities in this inter oxide
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Crystallization Karl R. Wirth Geology Department Macalester College St. Paul‚ MN 55105 wirth@macalester.edu Purpose: * improve understanding of fractional crystallization and magmatic differentiation * utilize mineralogy concepts (e.g.‚ stoichiometry) * utilizeclassification and chemical variation diagrams * provide practical experience designing and using spreadsheets * provide appreciation of the historical origins of an important concept in geology Introduction An understanding
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Learning Objectives Students will be able to... • Use a known mass of solid acid to determine an unknown concentration of a basic solution (this process is called “standardization”). • Execute a titration using good‚ reliable technique. • Use stoichiometry calculations and reactions occurring during a titration to convert from a known mass of acid to an unknown amount of base (and concentration). • Observe a pH indicator to determine the endpoint of a titration of acid with base (or vice versa)
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happening because the second reaction is consuming the I2 as quickly as it is formed. The important moment is when the S2O32- runs out‚ for then the I2 is no longer consumed (see the second reaction)‚ and the dark blue starch−I2 complex forms. The stoichiometry of the second reaction indicates that one I2 molecule must have been generated for every 2 ions of S2O32 − initially present in the solution. [I2 ] generated(from first reaction) = [I2 ] consumed(in second reaction) = {1/2[S2O32-] initially present}
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resembled a sort of powdery substance. B. Data Processing and Presentation The theoretical yield stated above (4.60 g) was calculated by finding the appropriate amount of moles of the substance in a balanced equation (1 mole) and using stoichiometry to find out the number of moles that are in the actual equation with the quantities used. This value came out as 4.60 g and is used for the theoretical yield. The average mass of the filter paper‚ a value used to determine the mass of the final
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