The growth of corn (Zea mays) roots and barley (Hordeum vulgare) coleoptiles is sensitive to the presence of external d-glucosamine and d-galactose. In order to investigate this effect, tissues were fed the radioactive monosaccharides at concentrations that ranged from those that were strongly inhibitory to those that had little influence on growth. At low concentrations, d-glucosamine is conve...

1. 2-Deoxy-2-fluoro-d-galactose, 3-deoxy-3-fluoro-d-galactose, 4-deoxy-4-fluoro-d-galactose, 6-deoxy-6-fluoro-d-galactose and 2-deoxy-d-lyxo-hexose are substrates for yeast galactokinase. 2. The variation in K(m) values for the d-hexose derivatives was not associated with a variation in the value of K(m) for MgATP(2-) indicating that the binding of MgATP(2-) is not modified by the binding of th...

OBJECTIVE To study the effect of Boschniakia rossica extract on free radicals in the brain of D-galactose induced senile rats. METHODS Sixty Wistar rats were randomly divided into normal group, model group (48 mg.kg(-1).d(-1) D-galactose, SC), Boschniakia rossica group (100, 150, 200 mg/kg ig and 48 mg.kg(-1).d(-1) D-galactose, SC). After 40 days, the activities of SOD, MAO and the content of...

The inducible D-galactose-6-phosphate isomerase that functions in the metabolism of lactose and D-galactose in Staphylococcus aureus was partially purified from extracts of D-galactose-grown cells. It was shown to catalyze specifically the reversible isomerization of D-galactose 6-phosphate to D-tagatose 6-phosphate, the apparent Km values being 9.6 mM and 1.9 mM, respectively. At equilibrium, ...

Interaction between aspartic acid and D-glucose, D-galactose, and D-fructose has been studied by isothermal titration calorimetry, calorimetry of dissolution, and densimetry. It has been found that D-glucose and D-fructose form thermodynamically stable associates with aspartic acid, in contrast to D-galactose. The selectivity in the interaction of aspartic acid with monosaccharides is affected ...

BACKGROUND L-ascorbic acid (L-AA) is naturally synthesized in plants from D-glucose by 10 steps pathway. The pathway branch to synthesize L-galactose, the key intermediate for L-ascorbic acid biosynthesis, has been recently elucidated. Budding yeast produces an 5-carbon ascorbic acid analogue Dehydro-D-arabinono 1,4-lactone (D-DAL), which is synthesized from D-arabinose. Yeast is able to synthe...

Saponaria officinalis L. (common soapwort), usually named fuller’s herb, is encountered in most of Europe, Spain, France, Italy, for example, and also Syria North Africa. known the world as an introduced species, often a weed, sometimes cultivated decorative plant. contains large amount saponins, which foam during extraction with water. In addition to common soapwort flavonoids, quillaic acid, ...

A water soluble galactomannan having D-Mannose [4-part] and D-Galactose [2-parts] was isolated from Cassia fistula. In cassia fistula Hydrolysis of methylated seed gum furnished three methylated sugars, 2, 3-di-O-methyl-D-mannose, 2, 3,6-tri-O-methyl-D-mannose and 2, 3,4,6-tetra-Omethy-D-galactose was present in molar ratio 3:2:1. Partial acid catalysed hydrolysis of the seed gum gave five olig...

background: increased oxygen free radical and reduced glutathione level in the eye lens are important risk factor for cataract formation. the antioxidative property and increasing cellular and extra cellular glutathione level have been reported by several herbal medicines including silymarin.  objective: in present interventional study silybum marianum l. seed extract (silymarin) was tested aga...

The inhibition of growth in Bacteroides melaninogenicus by sugars in described. Monosaccharides such as D-glucose, D-galactose, D-mannose, and D-fructose are inhibitory at low concentrations, whereas the disaccharides sucrose and lactose are not inhibitory even at high concentrations. The major inhibitory effect of the sugar is found during the transition of lag to logarithmic growth phases. Th...