at 100 oC for the appropriated times. Completion of the reaction was indicated by TLC. After completion of reaction‚ the mixture was cooled to room temperature. The solid residue was dissolved in hot ethanol and the catalyst filtered off. The filtrate solution was concentrated and the solid product was recrystallized in aqueous EtOH (70%) to give pure products. Selected spectra: 3 -(2′-benzothiazolo)-2‚3-dihydro-2-(4-chlorophenyl)-quinazolin-4(1H)-ones ( Table 1 Entry 1): m.p 229-239 oC; IR (KBr):
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Characterization of a Yam Class IV Chitinase Produced by the Recombinant Pichia pastoris X-33 Department of Botany‚ Jahangirnagar University‚ Savar‚ Dhaka 1342‚ Bangladesh Abbreviations: Endo H‚ Endoglycosidase H; PR protein‚ pathogenesis related protein; P. pastoris‚ Pichia pastoris; VTS‚ vacuolar targeting signal; PCR‚ polymerase chain reaction; PAGE‚ polyacrylamide gel electrophoresis; SDS‚ sodium dodecyl sulfate Abstract A yam (Dioscorea opposita Thunb) class IV chitinase‚ whose genomic
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type(s) of molecules involved with each intermolecular force. Heating Curve of Water: 1. Calculate the amount of heat required to increase the temperature of 150g of ice from -20 oC to 150 oC . 2. Calculate the mass of water present of if 25 kcal were able to increase its temperature from 22 oC to 115 oC. Phase Diagram: 1. Sketch a phase diagram for
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This allows us‚ then‚ to compute for the Annual Ordering Cost‚ OC(Q ): * ⎡ D ⎤ ⎡ 480 ⎤ OC Q = co ⎢ * ⎥ = (15 )⎢ ⎣ 34.64... ⎥ ⎦ ⎣ Q ⎦ ( ) * 12 ≈ $207.85 and the Annual Holding Cost‚ HC(Q ): * ⎡ Q * ⎤ ⎡ 34.64... ⎤ HC Q * = ch ⎢ ⎥ = (0.20 )(60 )⎢ ≈ $207.85 ⎣ 2 ⎥ ⎦ ⎣ 2 ⎦ ( ) Consequently‚ we can compute for the Annual Total Cost at the Economic Order Quantity‚ TC(Q ): * TC Q * = OC Q * + HC Q * = $207.85 + $207.85 ≈ $415.69 ( ) ( ) (
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o Officer Candidates School (OCS) only continues to increase. The OCS selection board evaluates applicants based upon three categories; 25% of their evaluation is Physical Fitness‚ 25% is Academics‚ and 50% is Leadership. While Leadership is the majority of the aggregate score‚ sound academics and physicality must be ensured before any leadership qualities can be highlighted. Not coincidentally‚ this 25/25/50 criteria used to evaluate Candidates at OCS and is exactly how I evaluat
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there have many communication theories. Among of these theories‚ interpersonal communication (IC) and organizational communication (OC) are the most commonly-used theories applied in business to help us resolve problems. IC‚ as a kind of device that organizers usually use to communicate with their employees‚ more emphasizes individuals interacting face-to-face than OC. It can help us understand how and why people think and behave. However‚ IC is hardly defined in its own area of study‚ yet often occurs
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2-bromo-2-methylbutane using addition of hydrogen bromide. THEORY Chemical Compound Molecular Formula Molecular Weight Boiling Point Melting Point Density Amylene CH3CH=C(CH3)2 70.13 g/mol 36 oC -134 oC 0.662 g/ml Hydrobromic Acid HBr 80.91 g/mol 126 oC -11 oC 1.490 g/ml 2-Bromo-2-MethylButane C5H11Br 151.05 g/mol 107 oC 1.18 g/ml Sodium bicarbonate NaHCO3 84.007 g/mol Decomposes at melting point unknown 2.159 g/ml Diethyl ether C2H5OC2H5 74.12 g/mol 34.6 °C −116.3 °C 0.7134 g/ml In this lab
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Name: JOANNA CELESTE M. QUINTANA Date performed: NOV. 12‚ 2012 Section: C-1L Date submitted: NOV. 21‚ 2012 Group Number: 3 Exercise No. 2 COLLIGATIVE PROPERTIES (Full Report) I. INTRODUCTION Colligative properties In liquid solutions‚ particles are close together and the solute molecules or ions disrupt intermolecular forces between the solvent molecules‚ causing changes in those properties of the solvent that depend in intermolecular attraction
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Aim: The aim of the experiment is to test the effect temperature has on the activity of the enzyme rennin. Hypothesis: I believe the rate of reaction will speed up as the temperature increases until it reaches about 37oC‚ which is the body temperature‚ where it will begin to slow down and stop reacting. I believe this will occur because enzymes have a temperature range at which they work best in and once the temperature goes out of this range the enzyme will stop working. Introduction:Enzymes are
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continuous stirring‚ add another 5 mL sodium hydroxide. Cool the solution to just below 15 oC. In a small beaker‚ dissolve 12.0 mmol of sodium borohydride in about 6 mL of 1 M sodium hydroxide. Remove the vanillin solution from the ice bath‚ and add the sodium borohydride solution in small portions to the vanillin over a 5 minute period. Make sure the temperature of the vanillin solution stays in the range of 20-25 oC. (In fact‚ this is the ideal temperature range for the rest of the lab‚ through acidification
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