Showing papers on "Glucoside published in 1981"
TL;DR: Results indicate that most of the coumarin-β-glucosidase in M. alba leaves is located in the extracytoplasmic space.
Abstract: The distribution of the glucosides of trans - and cis -2-hydroxy cinnamic acid and of the β-glucosidase which hydrolyzes the latter glucoside was examined in preparations of epidermal and mesophyll tissue obtained from leaves of sweet clover ( Melilotus alba Desr.). The concentrations of glucosides in the two tissues were about equal when compared on the basis of fresh or dry weight. Inasmuch as the epidermal layers account for no more than 10% of the leaf volume, the mesophyll tissue contains 90% or more of the glucosides. Vacuoles isolated from mesophyll protoplasts contained all of the glucosides present initially in the protoplasts. The specific activities of the β-glucosidase in the two tissues were also similar; thus, most of the enzyme is contained in mesophyll tissue. However, the amount of enzyme in mesophyll protoplast extracts amounts to only 1 to 2% of the activity present in leaf homogenates when chlorophyll was the basis for comparison. (This small amount of coumarin-β-glucosidase present in protoplasts is not associated with chlorophyll-containing fractions.) In contrast, 90% of the uridine diphosphate glucose- o -coumaric acid glucosyl transferase activity present in leaf homogenate was recoverable in protoplasts prepared from intact leaves. Such results indicate that most of the coumarin-β-glucosidase in M. alba leaves is located in the extracytoplasmic space. Only a small fraction (7%) of this extra cytoplasmic β-glucosidase was associated with individual cells or cell clusters isolated from clover leaves.
62 citations
TL;DR: In this article, eight species of Mentzelia (Loasaceae) have been investigated for iridoid glycosides and several novel compounds have been isolated and characterized by chemical and spectroscopic means.
52 citations
TL;DR: At the membrane level, the steroid structure is not absolutely necessary to evoke enzymatic functional changes, while octanol or its glucoside may exclude progesterone.
47 citations
TL;DR: Four β-glucosidase enzymes were extensively purified from the culture filtrates of Sclerotium rolfsii and some of their physicochemical properties studied, showing a single protein band in sodium dodecyl sulfate-gel electrophoresis and in disc gel electrophoreis.
43 citations
TL;DR: A C13-nor-carotenoid glucoside isolated from flue-cured tobacco was identified as 3-hydroxy-5, 6-epoxy-β -ionylβ -D-glucopyranoside.
Abstract: A C13-nor-carotenoid glucoside isolated from flue-cured tobacco was identified as 3-hydroxy-5, 6-epoxy-β -ionyl-β -D-glucopyranoside 3-Hydroxy-5, 6-epoxy-β -ionol obtained by enzymatic hydrolysis of the glucoside had the same relative structure as the naturally occurring trans -epoxide
35 citations
TL;DR: The variations in the ratio of Benedict- reactive (chlorogenic acid) and non-reactive compounds (mainly caffeic acid glucoside) are discussed in relation to their possible role in the regulation of fruit growth and maturation.
34 citations
TL;DR: In this paper, the structures of cinncassiol D1 (1), Cinnamomi Cortex (Toko Keihi), D2 (2), D3 (3), D4 (4), D5 (5), D6 (6), D7 (7), D8 (8), D9 (9), D10 (10), D11 (11), D12 (12), D14 (13), D15 (14), D16 (15), D17 (16), D20 (17), D21 (18), D
Abstract: The structures of cinncassiol D1 (1), cinncassiol D1 glucoside (2), cinncassiol D2 (3), cinncassiol D2 glucoside (4) and cinncassiol D3 (5), isolated from the fraction exhibiting anti-complement activity of the water extractive of Cinnamomi Cortex ("Toko Keihi"), have been characterized by means of chemical, spectral and X-ray analyses. They are novel pentacyclic diterpenes with a new skeleton.
34 citations
TL;DR: In addition to plantarenaloside and stansioside, a new iridoid glucoside with a formyl group at C-4 has been isolated from Tecoma stans as discussed by the authors.
32 citations
TL;DR: It is concluded that DIMBOA and its glucoside act as energy transfer inhibitors of photophosphorylation.
Abstract: Two hydroxamic acids isolated from maize extracts, 2,4-dihydroxy-7-methoxy-1,4-(2H)-benzoxazin-3(4H)-one (DIMBOA) and the 2-O-β-d-glucopyranoside of DIMBOA, inhibit photophosphorylation by spinach chloroplasts. Both cyclic and noncyclic photophosphorylations were inhibited to the same extent. The concentrations producing 50% inhibition for DIMBOA and its glucoside were about 1 and 4 millimolar, respectively. These compounds inhibit coupled electron transport but do not affect basal or uncoupled electron transport. Both acids inhibit the ATPase activities of membrane-bound coupling factor 1 (CF1) and of purified CF1. On the basis of these results, it is concluded that DIMBOA and its glucoside act as energy transfer inhibitors of photophosphorylation.
30 citations
TL;DR: Two malonyltransferases were isolated from irradiated cell suspension cultures of parsley and extensively purified and the substrate specificity of the enzymes in vitro was in good agreement with the pattern of malonylated flavonoid glycosides occurring in the cell cultures in vivo.
29 citations
TL;DR: A new flavanone glucoside, plantagoside (1) was isolated from the seeds of Plantago major var. japonica NAKAI (Plantaginaceae) together with aucubin, geniposidic acid, acteoside and syringin this paper.
Abstract: A new flavanone glucoside, plantagoside (1) was isolated from the seeds of Plantago major var. japonica NAKAI (Plantaginaceae) together with aucubin, geniposidic acid, acteoside and syringin. The structure of plantagoside was elucidated to be 1 on the basis of chemical and spectral evidence.
TL;DR: A cyanogenic glucoside, isolated from pods of Acacia sieberiana var. woodii, was shown to be (2R)-2- (β- d -glucopyranosyloxy)-3-hydroxy-3-methylbutanenitrile by spectroscopic and chemical methods as discussed by the authors.
Patent•
24 Jul 1981
TL;DR: In this paper, the surface of sugar is covered with about 0.1W 0.4wt% stevioside type glucoside, and preferably it is crushed and stirred.
Abstract: PURPOSE: To prepare a sweetener showing always a uniform blending ratio of sugar and a stevioside type glucoside, having increased sweetness without reducing the flavor of sugar, by covering the surface of sugar with the stevioside type glucoside. CONSTITUTION: Surgar in the form of crystal, granule, etc. is coated with a solution of a stevioside type glucoside in water or an organic solvent such as an alcohol, etc. by a proper method, e.g., by a spray, etc. so that the surface of sugar is covered with about 0.1W0.4wt% stevioside type glucoside, and preferably it is crushed and stirred. COPYRIGHT: (C)1983,JPO&Japio
TL;DR: Unedide, a novel iridoid glucoside isolated from Arbutus unedo (Ericaceae), has been established to be 6,7-dihydro-6β-hydroxymonotropein by detailed analysis of 1 H and 13 C NMR spectral data.
TL;DR: The structures of three novel diterpenes, cinncassiol C1 glucoside (1), CinncASSiol C2 (2) and C3 (3), which had been isolated from the fraction exhibiting anticomplement activity of the water extractive of Cinnamomi Cortex, were characterized in this paper.
Abstract: The structures of three novel diterpenes, cinncassiol C1 glucoside (1), cinncassiol C2 (2) and cinncassiol C3 (3), which had been isolated from the fraction exhibiting anticomplement activity of the water extractive of Cinnamomi Cortex, were characterized.
TL;DR: It is concluded that the tyrosine moieties, located in the active centre of the enzyme, have both glucoside and galactoside binding functions.
Patent•
06 Oct 1981
TL;DR: In this article, the sterol glucoside obtained from refining process of vegetable oil such as soybean oil is subjected to reprecipitation using pyridine or dioxane-acetone as the solvent system.
Abstract: PURPOSE:To separate the titled glucoside useful as pharmaceuticals such as hemostatic agent, blood vessel reinforcing agent, antishock agent, antiphlogistic agent, etc., in high purity, by the reprecipitation of crude sterol glucoside with specific solvent system as pyridine, etc. CONSTITUTION:Grude sterol glucoside obtained from refining process of vegetable oil such as soybean oil (pref. a steroid-containing material obtained as a layer between the water layer and the fatty acid layer in the preparation of fatty acid by the acid decomposition or the alkali decompositon and successive acidification the soda cake produced by the alkali deacidification process of the vegetable oil) is subjected to reprecipitation using pyridine or dioxane-acetone as the solvent system, and the crystallized sterol glucoside is separated as the objective product.