O-Perbenzoylated 4-phenyl-[C-(β-d-glucopyranosyl)formaldehyde]semicarbazone was prepared in the reaction of O-perbenzoylated β-d-glucopyranosyl cyanide and 4-phenylsemicarbazide in the presence of Raney-Ni. Acylation of O-perbenzoylated C-(β-d-glucopyranosyl)formaldehyde semicarbazone furnished the corresponding 4-acyl-[C-(β-d-glucopyranosyl)formaldehyde]semicarbazones. The reaction of O-perben...

A UDP glucosyltransferase from Bacillus licheniformis was overexpressed, purified, and incubated with nucleotide diphosphate (NDP) d- and l-sugars to produce glucose, galactose, 2-deoxyglucose, viosamine, rhamnose, and fucose sugar-conjugated resveratrol glycosides. Significantly higher (90%) bioconversion of resveratrol was achieved with α-d-glucose as the sugar donor to produce four different...

Let X be a del Pezzo surface of degree d, and assume that X is general if d = 1. We prove that the spaces M0,0 ( X, β ) are either empty or irreducible, if (d, β) 6= (1,−KX). When (d, β) = (1,−KX) it is well known that M0,0 ( X, β ) consists of twelve reduced points.

Four new triterpenoids which were identifed as 2α,3β,6β,19α-tetrahydroxy- oleanolic acid 28-O-β-D-glucopyranoside (1), 2-O-β-D-glucopyranosyloxy-3α,19α-di-hydroxyoleanolic acid (2), 2-O-β-D-glucopyranosyloxy-3α,19α-dihydroxyursolic acid (3), 2α,3α,6β,19α-tetrahydroxyursolic acid 28-O-β-D-glucopyranoside (4), were isolated from the aerial parts of Callicarpa kwangtungensis together with three kn...

V0 = 2, V1 = p, and Vn = PVn−1 −QVn−2 (n ≥ 2). (2) The characteristic equation x − Px + Q = 0 of the sequences Un and Vn has two roots α = (P + √ D)/2 and β = (P − √ D)/2 with the discriminant D = P 2 − 4Q. Note that D = α−β. Furthermore,D = 0 means x2−Px+Q = 0 has the repeated root α = β = P/2. It is well known that for any n ∈ N (see [4, pp. 41–44]), PUn + Vn = 2Un+1, (α− β)Un = α − β, Vn = α...

Polysaccharide was extracted from Acrocarpus fraxinifolius Wight. seeds yielded a water soluble sugar as D-galactose and D-mannose in 1:3 molar ratio. Polysaccharide upon partial acid hydrolysis affords mainly 3 disaccharides and one trisaccharide as: (I) α-D-galactopyranosyl-(1→6)-O-α-Dmannopyranose, (II) α-D-mannopyranosyl-(1→6)-O-α-D-mannopyranose, (III) β-D-galactopyranosyl(1→4)-Oβ-D-mannop...