Reducing action, sugars

Benefits Ginseng s main action is to help the body fight off physical, chemical and biological attacks by raising the body s own defence mechanisms. In human studies, there was a visible benefit in terms of physical and mental performance. It was also shown to reduce blood sugar levels in Type II diabetics. 

B) Reducing Action of Sugars. Use the same method as in the study of aldehydes and ketones. To 5 ml of Fehling s or Benedict s... 

Mechanism of action was not of primary importance. The fact that car-butamide and tolbutamide were effective in reducing blood sugar in man at... 

Mode of action and kinetics. Routine polygalacturonase assays were performed in a reaction mixture containing 50 mM Na-acetate pH 4.2 and 0.25 % w/v pga at 30 °C. The release of reducing sugars was determined according to Stephens et al. [9]. For determination of pH optima the 50 mM Na-acetate buffer was replaced by Mcllvain buffers. 

It was found98 that the amount of sucrose consumed could be accounted for entirely as levan and reducing sugars. Fructose formed part of the reducing sugars produced, and there was no appreciable interconversion of aldose and ketose. When raffinose was used as substrate, the products were levan, melibiose and D-fructose (but not sucrose and D-galactose). The following equation expresses fully the net result of the action of the autolyzate ... 

In an attempt to synthesize 2-desoxy-L-ribose, Mukherjee and Todd68 treated methyl 2,3-anhydro-jS-L-ribopyranoside (LXXII) with sodium thiomethoxide and then reduced the amorphous product. The sulfur-free sirup thus obtained was inert to the action of periodate and is therefore methyl 3-desoxy-/3-L-riboside (ayn., methyl 3-desoxy-/3-L-xyloside) (LXXIV) rather than the desired 2-desoxy derivative. The methylthio intermediate (LXXIII) was consequently a 3-methylthio-L-xylose derivative rather than a 2-methylthio-L-arabinose compound. The presence of a trace of the latter, however, is not wholly excluded since the sirupy desoxypentoside (LXXIV) gave a feeble green coloration in the Keller-Kiliani test, a reaction generally accepted as being specific for 2-desoxy-sugars. 

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