Showing papers on "Glucoside published in 1970"
TL;DR: The effect of pH on the over-all reaction and analysis of the reaction products suggest that the glucosylation of the sterol has a pH optimum of 8 to 9, and the pH optimum for the acylated steryl glucoside is 6.5 to 7.5.
Abstract: Mitochondrial preparations from pea root (Pisum sativum L. var. Alaska) cauliflower inflorescence (Brassica cauliflora Gars.) and avocado inner mesocarp (Persea americana Mill. var. Fuerte), and chloroplast preparations from spinach leaf (Spinacia oleracea L. var. Bloomsdale) incorporate glucose into steryl glucoside and acylated steryl glucoside when either uridine diphosphate-glucose or uridine diphosphate-galactose is supplied as precursor. In the case of pea root mitochondria, galactosyl diglycerides are not formed from either nucleotide sugar. In the case of spinach chloroplasts only 3% of the metabolized uridine diphosphate-galactose is found as steryl glycosides. Time course experiments indicate that the steryl glucoside is the precursor of the acylated steryl glucoside. The effect of pH on the over-all reaction and analysis of the reaction products suggest that the glucosylation of the sterol has a pH optimum of 8 to 9, and the pH optimum for the acylation of the steryl glucoside is 6.5 to 7. The synthesis of steryl glucoside and acylated steryl glucoside, catalyzed by acetone powders of pea root mitochondria, is stimuated by added sitosterol and stigmasterol.
70 citations
TL;DR: The kinetic and structural properties of the lysosomal α-d -glucoside glucohyrolase (EC 3.20) from cattle liver have been further investigated as discussed by the authors.
39 citations
TL;DR: In this article, the stability constants for Fe 3+ complexes of a hydroxamic acid and its glucoside, isolated from maize seedlings, were determined, and they were shown to be 19·4 and 21·3, respectively.
36 citations
32 citations
TL;DR: Roots and shoots excised from sorghum seedlings incorporated the label of p -hydroxymandelonitrile-1- 14 C but not the label into the cyanogenic glucoside, dhurrin, but Tyrosine-U- 14C significantly labelled the glucosides only in shoots.
23 citations
TL;DR: A new cyanogenic glucoside, triglochinin ( O -[β- d -glucopyranosyl]-1-cyano-1-hydroxy-4,5-dicarboxy-1,3-pentadiene), was isolated from the flowers of Triglochin maritimum L.
20 citations
TL;DR: The major flavonoid of Oenothera speciosa has been shown to be a new natural product, myricetin 3-O-methyl ether 3′-Oβ-d -glucoside as mentioned in this paper.
18 citations
TL;DR: Nicotinic acid glucoside was incorporated into nicotine with the same efficiency as nicotinIC acid, but the rate of the incorporation was markedly reduced when unlabelled nicotinic Acid was also fed, suggesting that the glucosides is not involved in the direct route of nicotine biosynthesis.
18 citations
16 citations
15 citations
TL;DR: It is suggested that the integument is the primary site for the biosynthesis of the glucoside in the animal, as it is exerted in the biosynthetic chain leading from tyrosine to protocatechuic acid.
TL;DR: A new glucoside, purpurein, was isolated from fresh June bark of Salix purpurea as discussed by the authors, which is a diastereoisomer of grandidentin with p-coumaroyl substitution.
TL;DR: Isolierung und Strukturaufklärung eines neuen Esterglukosides aus der Rinde von Tecomella undulata.
Abstract: Isolierung und Strukturaufklarung eines neuen Esterglukosides aus der Rinde vonTecomella undulata.
TL;DR: The structure of salicortin, an important component of the bark and leaves of all Populus and Salix species, was proved to be ω-(1-hydroxy-6-oxo-2-cyclohexene-1-carboxylic acid ester) by means of hydrogenolysis, acid and alkaline hydrolysis, and IR, NMR and mass spectra as discussed by the authors.
TL;DR: In this paper, the effect of simple phenolic glycosides on the activity of IAA-oxidase isolated from gherkin seedlings was studied in experimentsin vitro. But the effect was limited to the case when β-glycosidase was present: the phenols released from their bound form increased or decreased the IAA level.
Abstract: The effect of phenols and simple phenolic glycosides on the activity of IAA-oxidase isolated from gherkin seedlings was studied in experimentsin vitro. Phenol stimulated the enzyme system activity, eugenol and quinol were proven as inhibitors. Simple phenolic glycosides (arbutin, gein and phenol glucoside) influenced IAA-oxidase activity only if β-glycosidase was present: rree phenols released from their bound form increased or decreased the IAA level. The potential fegulatory effect of simple phenolic glycosides on the IAA level in plants has been discussed; this effect is thought to be mediated by free phenols and by influence on the IAA-oxidase system.
TL;DR: The 8-hydroxyquinoline β-D-glucoside was significantly catalysed by copper(II) ions at 70° and pH 5·5-6·0 as discussed by the authors.
Abstract: The hydrolysis of 8-hydroxyquinoline β-D-glucoside is significantly catalysed by copper(II) ions at 70·1° and pH 5·5–6·0.
Patent•
14 Apr 1970
TL;DR: In this article, a process for preparing vitamin B2-glucoside starting from a oligosaccharide having a glucoside linkage was described, using the microbial cell or the enzyme contained therein (trans glucosidase) of the species of Mucor.
Abstract: The present invention relates to a process for preparing vitamin B2-glucoside starting from a oligosaccharide having a glucoside linkage, such as maltose, liquefied starch or sucrose and the like, as the raw material using the microbial cell or the enzyme contained therein (trans glucosidase) of the species of Mucor.
TL;DR: An impurity, present in some samples of l-asparagine, gave genistein on acid hydrolysis and was metabolized by Mycobacterium phlei togenistein and prunetin.
Abstract: An impurity, present in some samples of l-asparagine, gave genistein on acid hydrolysis. The contaminant (probably the glucoside of genistein) was metabolized by Mycobacterium phlei to genistein and prunetin.
TL;DR: In this paper, a synthetic trans o -(β-d -6-3 H-glucosyloxy) cinnamic acid α- 14 C was administered to sweet clover shoots.
TL;DR: A study of the flavonoids of this plant, f rom an ethanolic extract of the leaves of E. condylocarpa, isolated a substance with the composit ion C21H2zO10, soluble in acetone, ethanol, and methanol and shows the flavanone nature of this substance.
Abstract: We have previous ly reported the isolat ion of a hyperoside f rom E. condylocarpa [1]. Continuing a study of the flavonoids of this plant, f rom an ethanolic extract of the leaves of E. condylocarpa we have isolated a substance with the composit ion C21H2zO10, mp 222 ° C (from ethanol, decomp), [a]~ -129.6 ° (c 0.617, methanol). The substance consis ts of c rys ta l s in the form of slightly yellowish needles readi ly soluble in acetone, ethanol, and methanol. On c h r o m a t o g r a p h y i n a f o r m i c a c i d e t h y l ace t a t e -wa te r (10 : 2 : 3) sys tem it gave a single spot with Rf 0.85 which, on t rea tment with sodium borohydride, assumed an in tense c r imson color. This shows the flavanone nature of this substance [2].
01 Jan 1970
TL;DR: The characteristics of theenzymic synthesis infour different plants are described and the effect ofpH on the over-all reaction and analysis of thereactionproducts suggestthattheglucosylation of thesterol hasapH optimum of8to9, and thepH optimumforthe acylationof thesteryl glucoside is6.3to7.3.
Abstract: Mitochondrial preparations frompearoot(Pisunt sativum L.var.Alaska) cauliflower inflorescence (Brassica cauliflora Gars.)and avocadoinnermesocarp(Persea americana Mill.var.Fuerte),and chloroplast preparations from spinachleaf(Spinacia oleracea L. var.Bloomsdale) incorporate glucose intosteryl glucoside andacylated steryl glucoside when eitheruridinediphosphate-glucose or uridinediphosphate-galactose issupplied as precursor. Inthecaseofpearootmitochondria, galactosyl diglycerides arenotformedfromeither nucleotide sugar.Inthecaseof spinachchloroplasts only3% ofthemetabolized uridine diphosphate-galactose isfoundassteryl glycosides. Time courseexperiments indicate thatthe sterylglucoside istheprecursor oftheacylated steryl glucoside. Theeffect ofpH on theover-all reactionandanalysis ofthereactionproducts suggestthattheglucosylation ofthesterol hasapH optimumof8to9,andthepH optimumforthe acylation ofthesteryl glucoside is6.3to7.Thesynthesis ofsteryl glucoside andacylated steryl glucoside, catalyzed by acetonepowdersofpearootmitochondria, isstimuatedbyaddedsitosterol andstigmasterol. roots utilized thesugar moiety ofUDP-galactose forthesynthesis oftwoglycolipids, neither ofwhichwasagalactosyl diglyceride. Thesecompounds havebeenidentified assteryl glucoside andan acylated steryl glucoside, andthis paperdescribes thecharacteristics oftheenzymic synthesis infourdifferent plants. EXPERIMENTALPROCEDURE MATERIALS