A simple and rapid method was developed for the determination of 20 antibiotics (sulfonamides, tetacyclines, and flumequine) in honey by liquid chromatography tandem mass spectrometry. The proposed method is sensitive (limit of detection 0.5 to 10 ppb for the various antibiotics) and selective. A hydrolysis step ensures the liberation of sugar-bound sulfonamides. The approach has been used to a...

high voltage electrophoresis. The average yield of the glycopeptide was in the range of 0.2 to 0.3 mg/liter of urine. Sugar analysis and amino acid analysis gave equimolar amounts of glucose, fucose, and threonine. Linkages and sequential order were established by methylation analysis of the glycopeptide after degradation of the amino acid residue with ninhydrin. The permethylated product was a...

A hitherto unreported esterified form of steryl glucoside has been isolated from potato tuber lipids and soybean phosphatides. It is composed of sterol, glucose, and fatty acid in the molar ratio 1 : 1 : 1. Four components of the sterol moiety have been detected ; they include &sitosterol and stigmasterol (identified by gas-liquid chromatography). Fatty acids are palmitic, stearic, oleic, linol...

Malt extract is a highly viscous, rich in sugars, water-based solution. It is produced by means of vacuum evaporation of a sugar solution (mash) in the brewing industry. It is a natural flavour and colorant and is widely used in baking, confectionery, breakfast cereals, malt beverages, dairy products, sauces and as a caramel substitute. The difficult handling and dosing of that viscous liquid p...

We report on the synthesis and self-assembly of three novel lipophilic guanosine derivatives exposing a ferrocene moiety in the C(5') position of the sugar unit. Their self-association in solution, and at the solid/liquid interface, can be tuned by varying the size and nature of the C(8)-substituent, leading to the generation of either G-ribbons, lamellar G-dimer based arrays or the G4 cation-f...

objectives: to compare bmi and inverted bmi in evaluating body measurement, resting blood pressure, dual energy x-ray absorptiometry (dexa) parameters of fat mass and metabolic risk factors in iranian children materials and methods: this is a cross-sectional study on 477 children aged 9-18 yearsin the south of iran. weight, height, resting blood pressure, waist and hip circumference and puberta...

Analysis by gas-liquid chromatography of the trimethylsilylated sugar residues of purified vesicular stomatitis virus grown in L cells or chick embryo cells revealed the presence in the whole virion of four hexoses (glucose, galactose, mannose, and fucose), two hexosamines (glucosamine and galactosamine), and 34 to 40% neuraminic acid. The isolated viral glycoprotein was devoid of galactosamine...

Low-acid hydrothermal (LAH) fractionation conditions were optimized for the effective degradation of hemicellulose from pine wood (Pinus densiflora). The hemicellulosic sugar yield was maximized at 82.5% when fractionated 190 °C, with 0.5 wt.% sulfuric acid, and 10 min. Consecutively, acidified heat treatment zinc chloride solvent extraction ethyl acetate carried out recovery bio-based platform...