Maltose rates

Such symps are used in the preparation of confections, preserves, and other foodstuffs. The maltose in malt symps is important in brewing (see Beer). Intravenous feeding (primarily in Europe and Japan) and sports beverage formulations take advantage of the fact that energy release from maltose becomes accessible to the body at a slower rate than energy suppHed by monosaccharides (31). 

Rate of permeation relative to tliat of maltose. Data adjusted to 100 s for maltose. The LamB-containing liposomes were added to buffer solutions containing 40 mM of die corresponding test sugars. 

The separation was carried out on a TSKgel Amide-80 column 4.6 mm i.d. and 25 cm long with a mobile phase consisting of a 80% acetonitrile 20% water mixture. The flow rate was 1 ml/min and the column was operated at an elevated temperature of 80°C. The saccharides shown were 1/ rhamnose, 2/ fucose, 3/ xylose, 4/ fructose, 5/ mannose, 6/ glucose, 7/ sucrose and 8/ maltose. The analysis was completed in less than 20 minutes. These types of separations including other biomonomers, dimers and polymers are frequently carried out employing refractive index detection. 

With good acceptors, apparent Fmax values increase with increasing acceptor concentration by a factor of about three at 600 mM maltose concentration.36 They decrease, as do initial reaction rates, with increasing concentrations of such weak... 

The rate of oxidation of ethylene glycol was found268-269 to attain a broad maximum between pH 2.5 and 6. In a very complete study of the effect of pH on the periodate oxidation of carbohydrates, Neumiiller and Vasseur260 showed that the oxidation of maltose, melibiose, methyl a-D-... 

In addition to possible variations between methods, there may also be variations in Tg within a method, depending on the measurement protocol employed. For example, the DCS Tg midpoint for a quench-cooled ( 100 K/min) maltose sample, heated at a scanning rate of lOK/min, was 43.1 0.21 °C, whereas for a maltose sample prepared using equal heating and cooling rates of lOK/min the Tg was 41.2 0.10°C (Schmidt and Lammert, 1996). For the same samples, DSC Tg Active temperatures were also calculated. Tg Active for the quench-cooled sample was 41.0 0.20 °C, whereas for the equal-rate sample, Tg Active was 38.6 0.06 °C. 

FlC. 1.—Relative Rates of Activity Against Glycosides at Various pH Values. [A. Hydrolysis of sucrose by /3-D-fructofuranosidase of Saccharomyces cerevisiae O, intact cells and A, toluene-treated cells (results of Wilkes and Palmer40). B. Maltose , fermentation by intact baker s yeast A, hydrolysis by a-D-glucosidase (results of Hestrin41 see also Ref. 42).]... 

Rate of acetolysis, relative to that of maltose, k = 0.12 h in 5 5 2 acetic anhydride-acetic acid-sulfuric acid at 40°. 

The data in Table I show that the enzyme acts with highest velocity on maltotetraose and oligosaccharides of higher molecular weight. The rate of action on maltotriose is one-half of the rate for the tetrasaccharide, and on maltose the rate is only one-tenth of the rate for the tetrasaccharide. Oligosaccharides in which the glucose units are joined by linkages other than a-1,4 are hydrolyzed at much slower rates than the 1,4... 

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