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Showing 1 to 20 of 20 for “"D-mannose"”.
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A Synthesis and Characterization of D-Lyxo-Hexos-5-Ulose From D-Mannose.
A convenient synthesis of 5-keto-mannose (D-lyxo-hexos-5-ulose, 20) from D-mannose is described. Methyl 2,3-0-isopropylidene-a-D-manno furanoside was converted to its crystalline 6-0-triphenylmethyl ether which in turn was oxidized at the C-5 hydroxyl group with either methylsulfoxide/acetic …
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The influence of monosaccharide types (D-glucose, D-mannose and D- galactose) in inducing lactic acidosis in goats
Call number: LD2668 .T4 1978 M78
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Investigating the effect of prophylactic D-mannose treatment on adhesion of Uropathogenic Escherichia coli to the human bladder epithelium
… Several studies have suggested that D-mannose reduces the binding of UPEC to the lining of the bladder in vitro and in animal models. This study used a 3D bladder epithelial cell model to investigate UPEC binding in the presence of urine samples from the women enrolled on a double-blind …
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The synthesis of amino- and deutero- sugars from halo-cyclohexadiene-cis-diols
… applied to achieve the synthesis of protected D-mannose- 2,3,4,5,6-d₅ 191, and derivatives thereof, from the metabolite d₅- bromocyclohexadiene-cis-diol 189 obtained from the microbial oxidation of d₅- bromobenzene 2 (Figure 2). See: Figure 2: Perdeuterated Sugar Synthesis
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Mannaric Acid and Mannaric Acid Polyamides: Synthesis and Characterization
<P>D-Mannose, an aldohexose and a C-2 epimer of the common monosaccharide D-glucose, occurs in a pyranose ring form as a component of a variety of plant polysaccharides and is the third most abundant naturally occurring aldohexose after D-glucose and D-galactose, respectively. Historically, …
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Mannaric Acid and Mannaric Acid Polyamides: Synthesis and Characterization
<P>D-Mannose, an aldohexose and a C-2 epimer of the common monosaccharide D-glucose, occurs in a pyranose ring form as a component of a variety of plant polysaccharides and is the third most abundant naturally occurring aldohexose after D-glucose and D-galactose, respectively. Historically, …
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Chemical synthesis of <em>Leishmania </em>lipophosphoglycan structures conjugated to a biotin moiety
… biotin spacer moiety to the repeat unit at the D-mannose 1-phosphate, it was decided to change the strategy and integrate the biotin-spacer moiety as a phosphate at the D-galactose unit. This meant performing chain elongation from the reducing end, with the first disaccharide unit being capped at …
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Darstellung langkettiger Monosaccharide mittels Olefin-Metathese-Reaktion
… verwendet, die sich jeweils auf Basis von D-Mannose, D-Glucose, D-Galactose oder D-Mannitol darstellen lassen. Es erfolgte zunächst eine Klammerung mittels einer Silyletherbrücke zu einem Dien. Anschließend erfolgte im Schlüsselschritt der Sequenz eine intermolekulare Metathese-Reaktion, …
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Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics
… of a ring-oxygenated variant of the Choi from D-mannose is reported in this dissertation. The ring-oxygenated variant of 2-carboxy-6-hydroxyoctahydroindole can potentially be used as a surrogate of Choi in the design and synthesis of aeruginosin-based thrombin inhibitors.
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Variable Tnf-α Production By Murine Macrophages to a Cell Wall Extract of Candida Albicans
… C. albicans, purified, and was shown to contain mannose by acid hydrolysis and paper chromatography. Murine peritoneal (PMφ) and alveolar (AMφ) macrophages were collected and treated with varying concentrations (0.05-1000 μg/ml) of mannan. Controls included LPS-treated cells and inhibition …
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Structural investigations of the polysaccharide gum exudates from Brabeiurn Stellatifoliurn and Grevillea Robusta
… unusual resistance to periodate oxidation of D-mannose and uronic acid residues in both gums.
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Clarification of the xanthan biosynthesis mechanism in Xanthomonas campestris pv. campestris B100 by mass spectrometry-based proteome analysis
… containing a side chain of β1,4-linked D-mannose, D-glucuronic acid, and β1,2-linked D-mannose.<br /><br /> In the first project, the proteome profiling of Xanthomonas campestris pv. campestris over the time of cultivation was considered. The consumption of nutrition and the amount of …
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Synthetic Study Of Karlotoxins And Investigation Of Alpha-Diaminoboryl Carbanion Chemistry
… which can be readily prepared from D-mannose in four steps following the literature precedent. α-Boryl carbanion species are known to exhibit excellent olefinating abilities via boron-Wittig reaction. This type of reaction was first reported in the 1960’s, and actively studied mainly …
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Charakterisierung neuer Avilamycin-Derivate und Klinische Studie zur antibiotischen Sequentialtherapie bei Patienten mit Fieber in der Neutropenie
… direkt von D-Glucose ab. Die D-Mannose wird erst nach Aufbau der Kette durch Epimerisierung der Position C2 aus D-Glucose gebildet wird. Auch die L-Lyxose entsteht letztlich durch Decarboxylierung der Position C6 einer D-Glucose. Die dafür zuständige Decarboxylase konnte im …
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The effect of vitamin A on plasma glycoproteins
… 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 after …
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Complex bioactive fiber systems by means of electrospinning
… such as saccharides. Aminofunctionalized D-Mannose or D-Galactose was reacted with the active pentafluorophenyl esters as followed by UV/Vis spectroscopy and XPS. The functionality was shown to be bioactive using macrophage cell culture. The meshes functionalized with D-Mannose specifically …
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Aufklärung der Funktion von zwei rRNA-Methyltransferasen und Untersuchungen zur Eurekanat-Biosynthese in Streptomyces viridochromogenes Tü57
… 4-O-Methyl-D-Fucose, 2,6-Di-O-Methyl-D-Mannose, L-Lyxose und Methyleurekanat zusammengesetzt ist. Avilamycine besitzen eine ausgezeichnete antibiotische Aktivität gegen grampositive und auch multiresistente Keime. Die Wirkung der Orthosomycine beruht auf einer Inhibierung der …
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Manipulation of ascorbic acid levels in Arabidopsis thaliana
… proposed, which achieves ascorbic acid using D-mannose and L-galactose as intermediates, referred to as the Smirnoff-Wheeler pathway (Wheeler et al., 1998). It was shown that transforming lettuce (cv. Grand Rapids and Black Seeded Simpson) and tobacco (cv. Xanthi) with the terminal enzyme in the …
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Developement of Natural Multifunctional Cosmetic Ingredients Using Biotechnological Approach
… extracellular polysaccharide consisting of D-mannose, O-glucose, O-galactose and Lfucose. Cytotoxicity analysis of GFEPS showed no significant toxic effects on endothelial (HMEC-1) and keratinocyte (HaCaTs) cell lines. An in vitro assay to measure reactive oxygen species production by human …
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Polyolato-Komplexe mit Kupfer(II) und Palladium(II)
… Metall-koordinierten Verbindungen von rac-Mannose 2, D-Arabinose 3, D-Ribose 4, D-Glucose 5 und D-Galactose 6 aufgeklärt. Die Strukturen 3–6 sind die ersten Kristallstrukturen von Metall-Komplexen dieser reduzierenden Zucker. Auch konnte das erste Mal ein Metallkomplex mit einem …