Showing papers on "Glucoside published in 1982"
TL;DR: The isolation of acteoside and coniferin from Paulownia tomentosa bark along with the previously reported phenolic glucoside syringin is described.
Abstract: The isolation of acteoside and coniferin from Paulownia tomentosa bark along with the previously reported phenolic glucoside syringin is described. The structure of both, acteoside and coniferin, have been assigned by (1)H- and (13)C-NMR spectroscopy.
68 citations
TL;DR: Cell suspension cultures of soybean were converted to protoplasts by use of the cell-wall degrading enzymes, Driselase and pectinase, and this procedure resulted in the release of the cellular amino acid conjugates as well as part of the free 2,4-dichlorophenoxyacetic acid and of the β-ᴅ- glucoside conjugacy.
Abstract: Cell suspension cultures of soybean (Glycine max L.) were incubated with [¹⁴C]-2,4- dichlorophenoxyacetic acid (62 h, 27 °C). The cells were converted to protoplasts by use of the cell-wall degrading enzymes, Driselase and pectinase. This procedure resulted in the release of the cellular amino acid conjugates as well as part of the free 2,4-dichlorophenoxyacetic acid and of the β-ᴅ- glucoside conjugates. A vacuole fraction was obtained by mild osmotic shock in 10% yield, and was characterized by its polypeptide composition. The purified vacuoles were enriched in β-ᴅ-glucoside conjugates, free 2,4-dichlorophenoxyacetic acid being only a minor vacuolar constituent, and amino acid conjugates not being detectable.
53 citations
49 citations
TL;DR: In this paper, 12 iridoid glucosides were identified from three Fouquieria sp. Eight of these were structurally related to galioside (monotropein methylester), while four were hydroxy substitution products of deoxyloganin.
38 citations
TL;DR: A new diterpene glucoside has been isolated from the leaves of Andrographis paniculata and its structure elucidated as deoxyandrographolide-19beta-D-glucoside on the basis of chemical and spectral evidence.
Abstract: A new diterpene glucoside has been isolated from the leaves of Andrographis paniculata and its structure elucidated as deoxyandrographolide-19beta-D-glucoside on the basis of chemical and spectral evidence. A detailed proton magnetic resonance study of the diterpene was crucial in the structure determination.
37 citations
TL;DR: A new xanthone glucoside named isoswertianolin (2) was isolated from Swertia japonica and its structure was elucidated to be 5-O-β-glucopyranoside of bellidifolin by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy.
Abstract: A new xanthone glucoside named isoswertianolin (2) was isolated from Swertia japonica and its structure was elucidated to be 5-O-β-glucopyranoside of bellidifolin by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. In connection with this study, the structure of swertianolin (1), a constituent of this plant, was reinvestigated by NMR spectroscopy, leading to the revision of its structure (the location of its glucosyl linkage) from 1-O-β-glucopyranoside of bellidifolin (3) to 8-O-β-glucopyranoside of 3. It follows that 1 is identical with the glucoside isolated from Gentiana campestris by Kaldas et al. in 1974. Analogously, the structure of norswertianolin (6), previously isolated from Swertia randaiensis HAYATA, was also revised, being formulated as 8-O-β-glucopyranoside of desmethylbellidifolin (7).
33 citations
TL;DR: It was concluded that the other glucose transport system which allowed growth of the mutant strain of S. salivarius was a second phosphoenolpyruvate: glucose phosphotransferase system.
Abstract: A spontaneous mutant of Streptococcus salivarius ATCC 25975 was isolated by inoculating an agar medium containing 11 mM lactose and 0.5 mM 2-deoxyglucose. This mutant grew poorly on 5 mM glucose but almost as well as the parental strain on 110 mM glucose. Uptake of 2-deoxyglucose was abolished by the mutation, and phosphoenolpyruvate: glucose phosphotransferase activity could not be detected with toluenized cells under normal conditions when the glucose concentration was below 5 mM. Data from growth experiments, glycolysis, and uptake studies indicated the presence of a second phosphoenolpyruvate: glucose phosphotransferase system that could catalyze the phosphorylation of alpha-methyl glucoside. The activity of this system was detected by a spectrophotometric assay coupled with lactate dehydrogenase and by a radioactive isotope method using methyl alpha-D-[U-14C] glucoside. The phosphorylation was phosphoenolpyruvate dependent. The apparent Km of the system for glucose and alpha-methyl glucoside was approximately 20 mM. Studies with energy poisons ruled out the possibility of an active transport system, and accumulation of alpha-methyl glucoside argued against facilitated diffusion. It was concluded that the other glucose transport system which allowed growth of the mutant strain of S. salivarius was a second phosphoenolpyruvate: glucose phosphotransferase system.
33 citations
TL;DR: Mass spectra of the 0-acetylmethyl ester of the conjugate, and of material biosynthesized from [1'-18O]ABA, showed that the glucoside is at C-4' of DPA, and the abbreviation 'DPAGS' is proposed.
Abstract: (±)-[2-14C]abscisic acid (ABA) and [2-14C]dihydrophaseic acid (DPA) fed to tomato shoots were converted into an acidic, polar conjugate that was hydrolysed (1 M HCl, 100°C) to D-glucose and DPA. The tetraacetylmethyl ester of the metabolite was isolated by high performance liquid chromatography as colourless crystals (m.p. 81-84°). N.m.r. spectra showed the presence of a β-glucosidic linkage (J 7 Hz, CDCl3; 8 Hz, D5 pyridine) between C-4' of DPA and C-1 of glucose. Mass spectra of the 0-acetylmethyl ester of the conjugate, and also of material biosynthesized from [1'-18O]ABA, showed that the glucoside is at C-4' of DPA. The abbreviation 'DPAGS' is proposed.
32 citations
TL;DR: In this paper, eleven compounds isolated from the growth inhibiting active fraction of male flowers of Cucurbita pepo were identified as p -hydroxybenzaldehyde, anisyl alcohol, p-hydroxylbenzyl methyl ether, veratryl alcohol and isovanillyl alcohol.
32 citations
TL;DR: The known secoiridoid glucoside Sweroside sweroside (structure I) has been isolated from the leaves of Tabernaemontana psorocarpa and identified by chemical, chromatographic and spectroscopical data.
Abstract: The known secoiridoid glucoside sweroside (structure I) has been isolated from the leaves of Tabernaemontana psorocarpa and identified by chemical, chromatographic and spectroscopical data. Its (1)H-NMR at 360 MHz is discussed.
31 citations
TL;DR: Oleanolic acid, mangiferin, and two new xanthone glucosides, named lanceoside and lancerin, were isolated from the aerial parts of Tripterospermum lanceolatum.
TL;DR: Oleanolic acid, norathyriol, and a new xanthone glycoside, tripteroside, which was characterized as N 6 O -β-d -glucoside were isolated from the fresh herb Tripterospermum taiwanense as mentioned in this paper.
TL;DR: The structure of a new glycerol glucoside, lilioside C, has been isolated from the leaves and stems of Lilium lancifolium by chemical and spectroscopic means and by its synthesis.
TL;DR: The aerial parts of Daphne sericea yielded two new flavonoids, luteolin 7-methyl ether 5-β-d -glucoside and lutesolin 7,3′-dimethyl ether 5β- d -glocoside, as well as lutelin 7-methyltimethyl ether, isovitexin, apigenin and its 7β-D -glugoside as mentioned in this paper.
TL;DR: Using this procedure, it has been demonstrated that the maltase and α-methylglucosidase induced by maltose are separate enzymes.
01 Sep 1982-Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology
TL;DR: A restrained, whole animal preparation was used to study chemical sensitivity and specificity of three cells in the medial galeal chemosensillum of adult red turnip beetles, finding that arbutin stimulates the sugar-sensitive cell and one of the glucosinolate-sensitive cells.
Abstract: A restrained, whole animal preparation was used to study chemical sensitivity and specificity of three cells in the medial galeal chemosensillum of adult red turnip beetles. One cell is sensitive to sugars, particularly sucrose and maltose, two cells respond to glucosinolates and two to the glucoside arbutin. Responses to mixtures of these compounds revealed that arbutin stimulates the sugar-sensitive cell and one of the glucosinolate-sensitive cells. The second glucosinolate-sensitive cell was stimulated only by glucosinolates. Dose-response curves were determined for most of the compounds tested.
TL;DR: The structure of tambuletin, present in seeds of Xanthoxylum species, has been confirmed as the 8-glucoside of gossypetin 7,4′-dimethyl ether as discussed by the authors.
TL;DR: The aerial parts of Urospermum picroides afforded, in addition to urospermal A a p -hydroxylphenyl acetate of a glucoside of uros permal A as mentioned in this paper.
Journal Article•
TL;DR: Acarbose was administered at a dose of 300 mg/day fbr S weeks to nine healthy volunteers to study the effects of diet and alcohol on cholesterol and triglyceride in healthy volunteers.
Abstract: Acarbose was administered at a dose of 300 mg/day fbr S weeks to nine healthy volunteers (Table 1). Volunteers were doctors, nurses and laboratory technicians in Keio University Hospital. All were requested not to change their dietary habits and not to drink much alcohol. Blood was collected serially after 12 hours of fasting. Very low density lipoprotein (VLDL) was separated ultracentrifugally by the method of Havel et aL (5). High density lipoprotein (HDL) was separated by the heparin-manganese precipitation method (16). Cholesterol and triglyceride were measured with an autoanalyser and an acetylacetone
TL;DR: Two new iridoid glucosides, isolated from Linaria cymbalaria (Scrophulariaceae), are 8-epiloganic acid and 7-beta-hydroxy-8-epiiridodial glucoside.
Abstract: Two new iridoid glucosides, isolated from Linaria cymbalaria (Scrophulariaceae), are 8-epiloganic acid ( 1) and 7-beta-hydroxy-8-epiiridodial glucoside ( 2). Partial synthesis of 2 from 8-epiloganin ( 3) has been performed.
TL;DR: A new iridoid glucoside from Macfadyena cynanchoides leaves has been identified by spectral ( 1 H and 13 C NMR) and chemical procedures as 5,7.
TL;DR: Adiposin showed antimicrobial activities against some Gram-positive bacteria, Gram-negative bacteria belonging to Enterobacteriaceae, Some anaerobic bacteria and some phytopathogenic fungi, and showed a synergistic effect on the antibacterial activity with some maltooligosaccharides, however, these antibacterial activities were suppressed by addition of various other saccharides.
Abstract: Adiposin-1 and -2 exhibited potent inhibitory activities against alpha-amylase, human salivary alpha-amylase and disaccharidases isolated from porcine small intestine. The effect of adiposin-1 and -2 on hydrolysis of glucoamylase was non-competitive. Adiposin showed antimicrobial activities against some Gram-positive bacteria, Gram-negative bacteria belonging to Enterobacteriaceae, Some anaerobic bacteria and some phytopathogenic fungi, and showed a synergistic effect on the antibacterial activity with some maltooligosaccharides. However, these antibacterial activities were suppressed by addition of various other saccharides.
01 Jan 1982
TL;DR: Several anthraglycosides were isolated from the bark of Rhamnus alaternus L. as mentioned in this paper and chromatographed on Whatman no. 1 paper in the solvent system n-propanol, ethyl acetate, water (40:30:30 v/v).
Abstract: Several anthraglycosides were isolated from the bark of Rhamnus alaternus L. These had the following Rf values when chromatographed on Whatman no. 1 paper in the solvent system n-propanol, ethyl acetate, water (40:30:30 v/v): G1, 0.98; G2, 0.92; G3, -; G4, 0.79; G5, 0.72; G6, 0.65; G7, 0.61. However, in the TLC system chloroform, ethanol-95%, water (60:30:2 v/v) on silica gel G, G5 was found to be a mixture of G5a and G5b, the latter with the lower Rf value; while G7 separated into G7a, G7b and G7c in descending order of their Rf values. G2, highest in yield, is an emodin glucoside; G4 is an alaternin glucoside; G1 occurs in least amount. G1, G5b, and G6 are diglycosides of emodin, each yielding glucose and rhamnose. G6 hydrolyzes into G2 on TLC in the solvent system methanol, ethyl acetate, water (17:100:13 v/v) on silica gel G. G5a yields physcion, glucose and rhamnose. The total yield of G5 is close to but lower than that of G2. G7 may be a mixture of dianthrone glycosides, yielding on total hy...
TL;DR: Boschnaside, 8-epi-iridodial glucoside a new iridoid glucosides was isolated from Boschniakia rossica Hult.
Abstract: Boschnaside, 8-epi-iridodial glucoside a new iridoid glucoside was isolated from Boschniakia rossica Hult., and its absolute structure was determined by chemical correlation of boschnaloside tetraacetate with boschnaside tetraacetate.
TL;DR: A previously unreported acylated 4-pyroae glycoside, 2-[6'-(O-trans-cinnamoyl)β-D-glucopyranosyloxy]-3-methyl-4 H-pyran-4-one (1) has been isolated from the basic fraction of a chloroform/methanol extract of the shoots of Silene vulgaris (Moench) Garcke (Caryophyllaceae) and identified mainly on the basis of the spectral characteristics of this compound and its triacetate
Abstract: A previously unreported acylated 4-pyroae glycoside, 2-[6'-(O-trans-cinnamoyl)β-D-glucopyranosyloxy]-3-methyl-4 H-pyran-4-one (1) has been isolated from the basic fraction of a chloroform/methanol extract of the shoots of Silene vulgaris (Moench) Garcke (Caryophyllaceae) and identified mainly on the basis of the spectral characteristics of this compound and its triacetate derivative as well as chemical degradation.
TL;DR: Phenoxyacetic acid is rapidly metabolised in fresh potato cortex slices via hydroxylation to give 4-OH-POA and subsequent β-glucoside formation and subsequent appearance of glucoside was promoted substantially by ageing in 2,4-dichlorophenoxyAcetic acid, 2-methyl-4-chlorophenoxyacetics acid (MCPA), and to a lesser extent indoleacetic Acid (IAA), but not by POA.
TL;DR: In this article, a new terpene glucoside, Loliolide-β-d-glucopyranoside from Flue-cured Tobacco, was isolated.
Abstract: (1982). Isolation of a New Terpene Glucoside, Loliolide-β-d-glucopyranoside from Flue-cured Tobacco. Agricultural and Biological Chemistry: Vol. 46, No. 5, pp. 1409-1411.