This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...been found by preliminary experiments to be the most favourable to the velocity of reaction. In the last column but one, marked A, are given the times elapsing before the rotation falls to 0 and in the last column, B, the times which would be necessary for this to occur on the assumption of proportionality between ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...been found by preliminary experiments to be the most favourable to the velocity of reaction. In the last column but one, marked A, are given the times elapsing before the rotation falls to 0 and in the last column, B, the times which would be necessary for this to occur on the assumption of proportionality between concentration of enzyme and velocity of reaction. Also with change of the concentration of sugar, the requirements of theory seem to be satisfied within very wide limits by O' S u 11 i v a n and Tompson's results, that is, in equal times one and the same quantity of enzyme hydrolyses equal proportions of the sugar, no matter what the concentration of the latter may be. On the other hand, A. J. Brown (Journ. Chem. Soc, 1902, 81, 373) gives numbers indicating that a given quantity of enzyme inverts the same absolute amount of sugar in a definite time: But in dilute sugar solutions containing relatively large amounts of enzyme, the action of a given quantity of enzyme is, according to Brown, proportional to the concentration of the sugar. Hudson collects his results in the following table: Influence of the Concentration of Invertase on the Velocity of Inversion at 3 0 The results are therefore as follows: 1. Proportionality exists between the amount of sugar inverted per unit of time and concentration of the enzyme. 2. The concentration functions are, in addition, dependent on the relative quantities of substrate and enzyme. So long as the enzyme is not present in large excess the relative amount of hydrolysis diminishes as the amount of substrate is increased. With his erroneous method, Henri observed a relation indicated by the following table. The number of milligrams of sugar inverted after the first minute in a c-normal cane-sugar solution is de...
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Add this copy of General Chemistry of the Enzymes; to cart. $61.07, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Palala Press.