1. Walls of Staphylococcus epidermidis I2 contain 30% (w/w) of a glycerol teichoic acid containing phosphate, d-alanine and d-glucose in the molecular proportions 1:0.25:0.50. 2. The teichoic acid was isolated by extraction with trichloroacetic acid and with dilute aqueous NN-dimethylhydrazine at pH7, and was shown to be a (1-->3)-linked poly(glycerol phosphate) containing beta-d-glucopyranosyl...

oxygen are essential for the reactions (Ryan, 1959). Among the numerous subsequent studies on the mechanism of oestrogen biosynthesis in vitro in the human placenta (Longchampt, Gual, Ehrenstein & Dorfman, 1960; Morato, Hayano, Dorfman & Axelrod, 1961; Gual, Morato, Hayano, Gut & Dorfman, 1962; Morato, Raab, Brodie, Hayano & Dorfman, 1962; Wilcox & Engel, 1965; Akhtar & Skinner, 1968; Townsley ...

This work aims to separate antimicrobial lipopeptides from fermentation by Aureobasidium pullulans PA-2, and verify its activity the optimum condition of lipopeptide production. Using high performance liquid chromatography (HPLC) analysis, with was evaluated agar well diffusion test. Response surface methodology (RSM) used determine conditions for A. PA-2. The in supernatant PA-2 strain found b...

Little is known about the catabolism of plant sulpholipid (sulphoquinovosyldiacylglycerol), a major component of green leaves. Several plant lipases have been examined, but none has absolute specificity towards a particular lipid class, unlike the phospholipid acyl hydrolases found in animals and micro-organisms (Dawson, 1973). For example, the so-called galactolipase (EC 3.1.1.26) fromPhaseolu...

Abstract Water treatment, abundant clay in the area, for elimination of particles and microorganisms wastewater disinfection through alcoholic extract molle, which has a high concentration tannins that acts as germicide, not affecting asparagus during cold washing, saving thousands cubic meters groundwater daily. The study explanatory level experimental design. weekly sample (drinking water, re...

Glial cells in the insect nervous system are believed to play a role in regulating the extracellular potassium concentration, both during neuronal activity through spatial buffering (Gardner-Medwin, Coles & Tsacopoulos, 1981), and also by forming a blood-brain barrier (Schofield & Treherne, 1984). The membrane potential of glial cells has been thought to be exclusively dependent on potassium (K...

In this study, the structural changes of alkali lignin induced by ozonation were investigated, and effect ozone-treated its mechanism on Avicel enzymatic hydrolysis was examined. The physicochemical properties analyzed FTIR, 1H-13C HSQC NMR, GPC. It revealed that ozone pretreatment increased content carboxyl and/or aldehyde groups negative zeta potential lignin, which enhanced electrostatic rep...

The aim of this study was to investigate the adaptation of the cyanobacterium Fischerella sp. ISC 107to combined effects of carbon dioxide concentration, acidic and alkalinity. Axenic strain was incubated in BG0-11 medium. Carbon dioxide treatments were limited and relatively non-limited. Acidic (pH 5), neutral (pH7), and alkaline (pH 9) conditions were employed in each treatment. Survival, gro...