The focus of this study is to understand the origin of the chiral recognition for a host-guest system containing complexes with different stoichiometries. Each enantiomer of 2-naphthyl-1-ethanol forms two different 1 : 1 complexes with β-cyclodextrin, leading to the formation of three different 2 : 2 complexes. One of these 2 : 2 complexes leads to excimer emission of the guest. Fluorescence st...

In this paper, a new approach for adaptive linearizing control of continuous fermentations with immobilized yeasts Saccharomyces cerevisiae BO 213 was proposed. Three fermentations with three different procedures of cells immobilization were investigated. The switching from batch to continuous mode of cultivation was realized automatically in time when the ethanol production rate reaches its ma...

Corydalis yanhusuo is used widely for the treatment of gastralgia, costalgia and dysmenorrhea in Chinese medicine. The alkaloid is the main active ingredient of C. yanhusuo. Response surface methodology was applied to optimize the separation and purification process for alkaloids by AB-8 resin-packed chromatogram column. The optimal conditions were found to be as follows: height-diameter ratio ...

To study the mechanism of the increase in serum lipoproteins which occurs in rats fed alcohol chronically, and especially to assess the role of the intestine, the effects of acute and chronic ethanol administration on lymph and plasma lipids were compared in rats with and without intestinal lymph fistulae. In rats not previously given alcohol, the administration of one dose of a diet containing...

1. The voluntary ethanol consumption, ethanol elimination rate and blood acetaldehyde level after intraperiotoneal injection of ethanol were studied in rats receiving diets with highly imbalanced proportions of dietary protein, carbohydrate and fat. 2. The rats, which received the low-protein diet containing 0.05 of the total energy as protein, 0.80 as carbohydrate and o.15 as fat, drank only a...

We studied the effect of 12 weeks of ethanol feeding on arterial blood pressure and baroceptor reflex control of heart rate in Sprague-Dawley and Wistar rats. Baroceptor reflex sensitivity and pressor responsiveness were evaluated by evoking graded rises in mean arterial pressure with increasing doses of phenylephrine and angiotensin II. After 12 weeks of ethanol feeding there was a modest incr...

Background. The nucleus accumbens (nAc) and the VTA are primary components of the mesolimbic dopamine system, which is activated by all drugs of abuse, including ethanol. GABAergic neurotransmission has repeatedly been shown to regulate the activity of dopaminergic neurons in the VTA, and the aim with this study was to define the involvement of nicotinic acetylcholine receptors (nAChRs) in medi...

Throughout the history of the automobile there have been periods of intense interest in using ethanol as an alternative fuel to petroleum-based gasoline and diesel derivatives. Currently available flexible fuel vehicles (FFVs) can operate on a blend of gasoline and ethanol in any concentration of up to 85% ethanol. In all these FFVs, the engine management system relies on the estimation of the ...

1. Hepatocytes isolated from starved rats and incubated without other substrates oxidized ethanol at a rate of 0.8-0.9mumol/min per g wet wt. of cells. Addition of 10mm-lactate increased this rate 2-fold. 2. Quinolinate (5mm) or tryptophan (1mm) decreased the rate of gluconeogenesis with 10mm-lactate and 8mm-ethanol from 0.39 to 0.04-0.08mumol/min per g wet wt. of cells, but rates of ethanol ox...

1. 2,4-Dinitrophenol (0.1mm) increases by 100-160% the rate of ethanol metabolism by rat liver slices incubated in a medium saturated with a gas mixture containing O(2)+CO(2)+N(2) (18:5:77). Similar effects are produced by relatively low concentrations of arsenate (10mm). At higher concentrations (37.5 and 50mm) arsenate inhibits the rate of ethanol metabolism. 2. When liver slices are incubate...