(1) Cholera toxin-catalysed ADP-ribosylation identified two forms of Gs alpha-subunits whose labelling was about 4-fold greater in membranes from diabetic animals compared with those from lean animals.
(2) Hexokinase, phoshofructokinase, and aldolase appear to be rate-limiting in normal cervix epithelium; however, since the increase in activity of the first two in cancers was least of all the glycolytic enzymes, redundant enzyme synthesis probably occurs in the malignant cell for the enzymes catalysing reversible reactions.
(3) Mixed micelles of bile salt and phospholipids inhibit the lipase-colipase-catalysed hydrolysis of triacylglycerols.
(4) One of the proteases obtained was found to catalyse cleavage on the COOH-side of peptide sequences containing consecutive hydrophobic and basic residues.
(5) Two distinct forms of oxidases catalysing the oxidative deamidation of D-alpha-amino acids have been identified in human tissues: D-amino acid oxidase (DAMOX) and D-aspartate oxidase (DASOX).
(6) Alcohol oxidase and catalase, which catalyse the oxidation of methanol to formaldehyde in Candida boidinii, could be localized within the peroxisomes.
(7) The enzyme system catalysing the formation of compound II has optimum activity at pH 8.8 Fe2+ (35muM), Fe3+ (35muM) and Al3+ (65muM) inhibit the reaction by 50 percent.
(8) The deacetylation step is catalysed by an acetyl hydrolase sensitive to the serine-hydrolase inhibitor PMSF (phenylmethanesulphonyl fluoride) [Touqui, Jacquemin, Dumarey & Vargaftig (1985) Biochim.
(9) However, (Z)-1,3-DCP undergoes mono-oxygenase-catalysed conversion into bacterial mutagens in the presence of S9 fraction or washed microsomes from rat liver.
(10) The RNA-catalysed self-splicing reaction of group II intron RNA is assumed to proceed by two consecutive transesterification steps, accompanied by lariat formation.
(11) The inhibition of pepsin-catalysed hydrolysis of N-acetyl-l-phenylalanyl-l-phenylalanylglycine by products and product analogues was studied.
(12) An enzyme (EC 2.8.2.1) that catalyses the transfer of sulphate from adenosine 3'-phosphate 5'-sulphatophosphate to phenols was purified approx.
(13) In rabbit liver, when ethanol is used to inhibit serine biosynthesis, control can be distributed between the three enzymes, even though the reactions catalysed by the first two remain close to equilibrium.
(14) An analysis of the in vitro processing of leuX precursor revealed that the processing of the 5' end took place in a single-step reaction catalysed by RNase P while the 3' processing involved two successive reactions.
(15) J., 405-409], we determined that Bordetella pertussis toxin is able to catalyse ADP-ribosylation of two substrates in the detergent soluble fraction of total muscle extracts.
(16) The following processes are discussed in this article: enzyme-catalysed hydrolyses of carboxylic acid esters and amides, phosphate esters, nitriles and epoxides; esterification and inter-esterification reactions catalysed by enzymes; reduction of ketones to secondary alcohols using whole-cell systems or isolated dehydrogenases; oxidation of alicyclic and aromatic substrates using mono-oxygenases and dioxygenases in bacteria and fungi including enzyme-catalysed Baeyer-Villiger oxidations; aldol reactions, formation of optically active cyanohydrins and enzyme-catalysed acyloin type reactions.
(17) An enzyme system that catalyses the sulphation of p-nitrophenol, cholesterol, alpha-ecdysone, beta-sitosterol, dehydroepiandrosterone, oestrone and four other steroids of plant and insect origin was obtained from the soluble fraction of southern-armyworm gut tissues.
(18) The rate of reactivation is pH dependant, characteristic of base-catalysed ester hydrolysis.
(19) Starting from peracetylated chloro- or bromo-glycosyl donors of N-acetylneuraminic acid, N-acetylglucosamine, glucose and lactose, the corresponding p-formylphenyl glycosides were synthesized stereospecifically under phase transfer catalysed conditions at room temperature in yields of 38-67%.
(20) When oxygen uptake was followed by a manometric method the rate of the peroxidase-catalysed reaction was proportional to oxygen concentration and marked inhibition by cyanide was obtained only at low buffer concentration.
Fermentation
Definition:
(n.) The process of undergoing an effervescent change, as by the action of yeast; in a wider sense (Physiol. Chem.), the transformation of an organic substance into new compounds by the action of a ferment, either formed or unorganized. It differs in kind according to the nature of the ferment which causes it.
(n.) A state of agitation or excitement, as of the intellect or the feelings.
Example Sentences:
(1) Thirty-two strains of pectin-fermenting rumen bacteria were isolated from bovine rumen contents in a rumen fluid medium which contained pectin as the only added energy source.
(2) We investigated the possible contribution made by oropharyngeal microfloral fermentation of ingested carbohydrate to the generation of the early, transient exhaled breath hydrogen rise seen after carbohydrate ingestion.
(3) The cell fermentation culture with a stabilized pH value was better than the culture with the pH value changing spontaneously on saponin content, growth rate and biomass.
(4) Forty-five enteropathogenic (enteropathogenic Escherichia coli-like) strains isolated in commercial rabbit farms were subdivided into four biotypes with the help of six carbohydrate fermentation tests, ornithine decarboxylase tests, and motility tests.
(5) The different hydrolytic, fermentative and methanogenic activities of these populations ensure the efficient degradation of cell wall constituent in forages (cellulose, hemicellulose, pectin) ingested by ruminants.
(6) The addition of sodium bicarbonate to gum containing sorbitol markedly enhanced its capacity to cause and maintain an elevation of interproximal plaque pH previously lowered by exposure to fermentable carbohydrate.
(7) The test organisms included 218 gram-negative fermentative clinical isolates.
(8) An investigation was done on the action in vitro of two pharmaceutical preparations containing Bi, De Nol and Pepto Bismol, on the fermentative capacity of intestinal bacteria.
(9) Acid production by carbohydrate fermentation increases urease production by Klebsiella: pH 4 is the most convenient pH for urease synthesis by these bacteria.
(10) These percentages suggest that a better fermentation took place in those silages containing forages.
(11) These swine were compared to four groups fed the medicated diet to determine the effect of duration of treatment and degree of animal isolation on the persistence of resistance in lactose-fermenting enteric organisms.
(12) These cocultures can be considered as metabolic associations, where the Bacillus produces degradation and fermentation products of pectin, which can be used by Azospirillum species.
(13) To show the decisive role of the inoculum parameters in regulation of the specificity of the secondary synthesis, the dynamics of accumulation of certain metabolites forming from glucose along with the main antibiotic and the activity of the key enzymes of the carbohydrate metabolism during the culture growth in the fermentation media were studied.
(14) When fermented in preferential media it produces geldanamycin, nigericin, nocardamine, and a libanamycin-like activity.
(15) Aerobic growth of even the latter strain was largely fermentative (ca.
(16) In trial with adult wethers and weaned lambs the effect of enzymatic preparation Pektofoetidin G3x (mostly pectinase and cellulase) on rumen fermentation was studied.
(17) Microbial fermentation and nutrient degradation in the rumen were reduced by saponins.
(18) The increase in membrane resistance at low pH allowed S. bovis to maintain its membrane potential and expend less energy when its ability to ferment glucose was impaired.
(19) Changes in the fermentative activity of C. albicans as dependent on the incubation time with the antibiotic were studied.
(20) The level of lactate dehydrogenase, which is dependent upon ketohexose diphosphate for activity, decreased as fermentation became heterolactic with Streptococcus lactis ML(3).