Glucose reaction order

The aim of the present work was to characterize the antioxidants formed in the reaction between histidine and glucose in order to elucidate the mechanism of their antioxidative action. The combination histidine-glucose was chosen since it previously was found to be one of the most effective combinations in model systems (13). 

A cursory inspection of the results reveals that the reaction orders with respect to both Mg-ATP and glucose are positive, but less than one. For the initial rate this suggests an equation of the form... 

For cellulase, typically 0.15 < r < 0.7. This fractional reaction order is characteristic of many effects by cellulase, not just production of glucose. The fractional reaction order indicates a diminishing return on increasing enzyme dosage. The relationship between extent of hydrolysis and reaction time is also expressed by a fractional exponent in time, which indicates a loss of enzyme effectiveness over time. 

Moreover, according to kinetic experiments at low glucose concentrations (<0.1M), a first reaction order was found, tending to an asymptote at higher concentrations (0.5 M). A first-order dependence was also found for the O2 concentration. 

We need to make a plot of log Vo against log (glucoseJo for a given [hexokinaseJo and find the reaction order a from the slope and the value of from the intercept at log [glucose]o=0. Then, because... 

C. It is secreted along with noradrenaline by the adrenal medulla, from which it may be obtained. It may be synthesized from catechol. It is used as the acid tartrate in the treatment of allergic reactions and circulatory collapse. It is included in some local anaesthetic injections in order to constrict blood vessels locally and slow the disappearance of anaesthetic from the site of injection. Ultimately it induces cellular activation of phosphorylase which promotes catabolism of glycogen to glucose. 

Sucrose (Ci2H22On) hydrolyzes into glucose and fructose. The hydrolysis is a first-order reaction. The half-life for die hydrolysis of sucrose is 64.2 min at 25°C. How many grams of sucrose in 1.25 L of a 0.389 Af solution are hydrolyzed in 1.73 hours ... 

Bronsted and Guggenheim [J. /Am. Chem. Soc., 49 (2554), 1927] have studied the mutaro-tation of glucose as catalyzed by acids and bases. The reaction takes place slowly in pure water, is weakly catalyzed by hydrogen ions, and is strongly catalyzed by hydroxide ions. When strong acids and bases are employed as catalysts, the apparent first-order rate constants can be written as... 

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