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Showing 1 to 20 of 90 for “"glucosamine"”.
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Hydrolysis of alpha-D-glucosamine-l-phosphate
… was obtained by studying the kinetics of ∝-D-Glucosamine-1-phosphate.</p><p>∝-D-Glucosamine-1-phosphate was synthesized, an experimental pH-rate profile for the hydrolysis of this phosphate was determined at 100 C.</p><p>It was proposed that Species I (see page 7) had P-O cleavage with …
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Glucose and Glucosamine Derivatives as Novel Low Molecular Weight Gelators
… is the most common monosaccharide and D-glucosamine is isolated from natural sources, such as crab shells. Several series of compounds were synthesized using compounds 1-3 as the starting materials. These include esters, carbamates, amides, and ureas. The structure and gelation …
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The genetics of glucosamine in yeast : cytoplasmic determinants conferring resistance
Two cytoplasmic, glucosamine resistant mutants of Saccharomyces cerevisiae, GR6 and GR10, were examined to determine whether or not the lesions involved were located on mitochondrial DNA. Detailed investigation of crosses of GR6 and GR10 or their derivatives to strains bearing known mitochondrial …
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Design, Synthesis and Characterization of D-glucosamine Low Molecular Weight Gelators
… have studied the gelation capability of several glucosamine derivatives. Several series of 4,6-O-acetal protected glucosamine derivatives were synthesized and screened for their gelation properties in several solvents.
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Modification and Translocation of the Biofilm Exopolysaccharide Poly-β(1,6)-N-acetyl-D-glucosamine
… pathogenic bacteria is poly-beta(1,6)-N-acetyl-D-glucosamine (PNAG). The modification of PNAG through deacetylation and/or hydrolysis by PgaB, BpsB, and IcaB is required for biofilm formation by Escherichia coli, Bordetella bronchiseptica, and Staphylococcus epidermidis, respectively. E. coli PgaB …
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The Synthesis of Glucosamine-Based Derivatives with Potential as Immunomodulators, Kinase Inhibitors, and Prodrugs
… Special attention has been given to the roles of glucosamine and N-acetyl glucosamine. Chapter 2 details the synthesis of novel glucosamine-based serine glycolipids, which were tested for their immunomodulatory ability. The experimental conditions investigated are discussed in detail. Chapter 3 …
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Synthesis and biological evaluation of aeruginosin based compounds and self-assembly of glucosamine based compounds
… the design, synthesis and self–assembly of glucosamine based hydro and organogelators<strong>. </strong>Carbohydrate-based low molecular weight gelators are an interesting class of molecules with many potential applications. A series of amides and ureas were prepared from the protected …
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Influence of Varying Inorganic Nutrients Supply on Ergosterol and Glucosamine Concentrations and Biomass Nutrient Stoichiometry in Ectomycorrhizal Fungi
<p>Ectomycorrhizal (ECM) fungi are critical for the health of forest ecosystems where they can sequester large amounts of carbon in the form of soil organic matter, a matter of growing interest due to anthropogenic climate change. A clear understanding of their growth dynamics and responses to …
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Development of Mono-de-N-acetylated β-(1→6)-N-acetyl-D-glucosamine Substrates for Characterization of PgaB Hydrolase Activity
… de-N-acetylated poly-β-(1→6)-N-acetyl-D-glucosamine (dPNAG) exopolysaccharide is required for biofilm formation in many clinically relevant bacteria. The PgaABCD biosynthetic machinery is responsible for the synthesis and export of dPNAG in Gram-negative bacteria. PgaB is a two-domain …
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Regulation of glucosamine-6-phosphate synthase synthesis by a hierarchical acting cascade composed of two small regulatory RNAs in <i>Escherichia coli</i>.
Aminozucker sind essentiell für die Biosynthese der bakteriellen Zellwand und der Lipopolysaccharide. Das Enzym Glukosamin-6-Phosphat Synthase katalysiert die Bildung von Glukosamin-6-Phosphat (GlcN6P) aus Fruktose-6-Phosphat und Glutamin. Dies ist der erste Schritt der Aminozuckerbiosynthese. In …
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The Effect of Glucosamine Usage Combined with Non-Traditional Exercise on the Ability to Meet Self-Care Requisities for Clients with Osteoarthritis of the Knee
… to describe the correlations between the use of glucosamine hydrochloride, regular exercise, the practice of Tai Chi and yoga on the self- reported signs and symptoms and physical functioning in individuals with osteoarthritis</p> <p>of the knee.</p> <p>The study consisted of a 72-item voluntary …
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Structural characterization of a glycoprotein cellulase, β-(1[arrow]4)-glucan cellobiohydrolase C, from Trichoderma viride
… and 3.9 moles of mannose, glucose, galactose and glucosamine, respectively, per mole of enzyme (molecular weight 55,000). Methylation analysis of cellobiohydrolase glycopeptides indicates an average carbohydrate chain length of two residues. Consistent with the idea of several short carbohydrate …
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The effect of vitamin A on plasma glycoproteins
The rate of uptake of label from radioactive D-glucosamine and D-mannose into the plasma glycoproteins was studied in vitamin A-deficient rats by comparison with the plasma of normal pair-fed controls. Preliminary studies indicated that peak incorporation (specific activity) was reached three hours …
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The Role of The Thyroid Gland in Regulating Synthesis and Release of Luteinizing Hormone in The Rat
… precursors, (('14)C) alanine and (('3)H) glucosamine, for 4 h at 37 C. Labeled LH was isolated by immunoprecipitation with specific anti-LH-(beta) serum. The levels of T(,4) and triiodothyronine (T(,3)) in the serum as well as the immunoreactive LH (IR-LH) in the serum, medium, and APs …
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LECTINS FROM THE HORSESHOE CRAB, LIMULUS POLYPHEMUS, REACTIVE WITH BACTERIAL LIPOPOLYSACCHARIDE
… the proposed binding site in this region is the glucosamine backbone of the lipid A molecule.</p><p>A sialic acid-binding lectin from the serum of the horseshoe crab, Limulus polyphemus, was isolated by preparative polyacrylamide slab gel electrophoresis and by ion-exchange chromatography on a …
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Synthetic studies of heparan derivatives: Glycosyl couplings and post-glycosylative modifications
… heparin are comprised of alternating units of D-glucosamine and either D-glucuronic acid (D-GluA) or L-iduronic acid (L-IdoA), and support variable degrees of sulfation which can interact with a large number of proteins with diverse biological functions. HS oligosaccharides can be constructed …
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Συγκριτική έρευνα νεφροτοξότητας του na-meglumine-diatrizoate (urografin) και του iohexol (omntraque)
… CREATININE AND CREATININE PROTEIN N-ACETYL B- GLUCOSAMINE, DASE AND TRECHALASE IN URINE AND CREATININE CLEARANCE ON A 24 HOUR BASIS BEFORE AND AFTER INTRAVE NOUS INJECTION OF SODIUM MECLUMINE DIATRIZOATE AND ONE MONTH LATER WITH 10 HEXOL. THE DATA WERE ANALYSED BY A COMPUTER USING THE STUDENTS …
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Novel small molecules for modulation of bacterial signaling pathways
… L-homoserine lactones (AHLs), indoles, N-acetyl glucosamine and other heterocyclic systems derived from halogenated furanones (Fimbrolides). Indole and glucosamine-based amides and oxo-amides were synthesized as non-native AHL mimics by applying EDC, DCC or EDC/HOBt mediated amide coupling …
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