Showing papers on "Glucoside published in 1972"
TL;DR: Polyclar AT, an insoluble form of poly- N -vinylpyrrolidone is highly effective in purification of gibberellin-like substances in plant extracts, presumably by selective removal of phenolic compounds and perhaps other organic acids as mentioned in this paper.
163 citations
102 citations
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37 citations
TL;DR: It was concluded that separate transferases were responsible for the formation of the two types of glycosides, including monoglucuronides and glucosides, which were formed in much lesser yield than the glucuronides.
Abstract: 1. Rabbit liver microsomal fractions in vitro effected the transfer of glucuronic acid from UDP-glucuronic acid to biochanin A, formononetin, daidzein, genistein and equol. Only monoglucuronides were formed. 2. The same isoflavones were converted into monoglucosides when UDP-[6-(3)H]glucose was substituted for UDP-glucuronic acid in the incubation medium in vitro. The glucosides were formed in much lesser yield than were the glucuronides. 3. The glucoside of genistein was identified as genistin (genistein 7-glucoside) by Sephadex chromatography and reverse isotope dilution. 4. The specificity of the glucuronyl- and glucosyl-transfer mechanisms was compared for a series of steroids and other phenols in addition to the isoflavones. It was concluded that separate transferases were responsible for the formation of the two types of glycosides.
35 citations
TL;DR: The isolation and chemical composition of an electronmicroscopically homogeneous membrane fraction from the gliding bacterium Myxococcus fulvus (Gram-negative) was described and about 22 % of total phospholipids were identified as alk-1-enyl-acyl derivatives.
30 citations
TL;DR: The enzyme is specific for UDPapiose as glycosyl donor and 7-Glucosides of flavones, flavanones and isoflavones, apigenin-7-glucuronide and glucoside of p -substituted phenols can function as acceptors.
28 citations
TL;DR: The reportedly 'new' constituent (thymelol) of Thymelea hirsuta (L.) Endl.
17 citations
13 citations
TL;DR: An unidentified flavin compound was found in the extract of cat liver and was purified by a combination of adsorption, ion exchange, partition, and gel chromatographies as mentioned in this paper.
Abstract: An unidentified flavin compound was found in the extract of cat liver. It was purified by a combination of adsorption, ion exchange, partition, and gel chromatographies. The compound was identified as riboflavinyl α-D-glucoside by spectroscopic and chromatographic studies, analvses of sugar, and digestion with glucosidases. The possibility of the natural occurrence of riboflavinyl glucoside is discussed.
11 citations
TL;DR: The enzyme behaved as a cation at acid pH but not as an anion at alkaline pH, and it is suggested that possibly carboxylic groups from aspartate and/or glutamate are blocked.
TL;DR: Triglochinin, reformulated as a 4-carboxylmethyl-5-cyano-5β-D-glucopyranosyloxy-cis-penta-2,4-dienoic acid, appears to be a product of ring cleavage of an o-diphenolic cyanohydrin glucoside.
Abstract: Triglochinin, reformulated as a 4-carboxylmethyl-5-cyano-5-β-D-glucopyranosyloxy-cis-penta-2,4-dienoic acid, appears to be a product of ring cleavage of an o-diphenolic cyanohydrin glucoside.
TL;DR: A new bitter glucoside, named aloenin, isolated from Aloe species has been established to be 2-(carbomethoxymethyliden)-4-(β-D-glucopyranosyloxy)-7-hydroxy-5-methylchromene (1).
Abstract: A new bitter glucoside, named aloenin, isolated from Aloe species has been established to be 2-(carbomethoxymethyliden)-4-(β-D-glucopyranosyloxy)-7-hydroxy-5-methylchromene (1). This is an unique example of naturally occurring chromene having the carbomethoxymethylidene group on C-2.
TL;DR: The fate of hydroquinone and catechol administered to a variety of higher plants over a period of several days has been investigated as discussed by the authors, and 15 of 23 species examined yielded a phenolic glucoside derivative which appeared to be identical to a compound described earlier by Pridham and Saltmarsh as a p-glucoside-6′-sulfate.
TL;DR: The amount of protocatechuic acid glucoside in the left colleterial gland changes with the reproductive cycle and resumes to accumulate with the reimplantation of corpora allata into the allatectomized cockroaches.
Abstract: The amount of protocatechuic acid glucoside in the left colleterial gland changes with the reproductive cycle. Allatectomy, beheading and injection of actinomycin D cause inhibition of the accumulation of glucoside, but glucoside resumes to accumulate in the left colleterial gland with the reimplantation of corpora allata into the allatectomized cockroaches.
When 14C-glucose was injected in normal animals, radioactive glucoside was accumulated in the left colleterial gland whereas in the allatectomized cockroaches, it was not accumulated in the gland but was found abundantly in blood.
The level of protocatechuic acid glucoside synthetase activity of the fat body tissue and of the left colleterial gland was assayed. The enzyme activity in the left colleterial gland was not affected by allatectomy but that in the fat body was slightly affected.
The mechanism of accumulation of protocatechuic acid glucoside in the left colleterial gland and the endocrine control on the accumulation are discussed.
TL;DR: In this article, a rapid fluorometric technique was developed for the measurement of β-glucosidase activity, which measured the change in concentration of a non-fluorescent substrate such as 4-methylumbelliferone β- d -glucose by recording increases in fluorescence as the aglycone is produced.
TL;DR: A strain of soil bacteria was isolated by elective culture with bergenia, a C-glucoside having dihydroisocoumarin structure, as a sole carbon source, and was identified as Erwinia herbicola, which seemed to utilize the sugar moiety of bergenin preferentially as carbon and energy sources.
Abstract: A strain of soil bacteria was isolated by elective culture with bergenia, a C-glucoside having dihydroisocoumarin structure, as a sole carbon source, and was identified as Erwinia herbicola. In growth or replacement medium, the bacterium degraded bergenin to yield at least two major degradation products, one of them being identified as 4-O-methylgallic acid (compound I), an aglycone of bergenin. The bacterium seemed to utilize the sugar moiety of bergenin preferentially as carbon and energy sources, since the rate of further transformation of compound I by the bacterium was slow. In replacement culture with compound I, gallic acid was detected as one of the metabolites. A possible pathway for microbial degradation of bergenin is proposed.
TL;DR: In this article, a comparative study was made of the synthesized β-D-glucopyranosides of phenol, guaiacol, 1-guaiacylpropane and the methyl ether of coniferin and dihydroconiferin, at pH 1 and 2.
Abstract: 1.
A study was made of the comparative stability of the synthesizedβ-D-glucopyranosides of phenol, guaiacol, 1-guaiacylpropane and the methyl ether of 1-guaiacyl-1-propanol, and also of coniferin and dihydroconiferin, at pH 1 and 2.
2.
The stability of the glucoside linkage in these compounds depends on the temperature, the acidity of the medium, and the structure of the aglycon.
3.
A methoxyl group in the o-position of the aromatic ring and anα,β-double bond in the side chain of the aglycon weaken the glucoside linkage. The presence and position of an alcohol group in the side chain do not affect the stability of the linkage.
TL;DR: The ability of Con A-Mn to interfere with the enzymic hydrolysis of both para-Nitrophenyl and pNP-α- D -mannoside by purified rat liver lysosomes may provide an additional method for determining the specificity of other plant lectins.