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Showing 1 to 20 of 27 for “"uronic acid"”.
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Structural studies on enzymes involved in uronic acid polysaccharide degradation
Uronates are charged sugars that constitute a major component of glycosaminoglycans (heparin, heparin sulfate, hyaluronan etc.,) and cell wall polysaccharides of plants (pectate/ pectin) and marine algae (alginate, ulvan). Glycosaminoglycans (GAGs) participate in a variety of cellular functions …
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Effects of restricted growth rate, elevated vitamin and mineral levels and aging on bone growth, histological integrity and biochemical composition of articular cartilage in boars
… of gross lesions was observed over time. Uronic acid content of the articular cartilage from the femur was greater for the restrict-fed boars, however, uronic acid content of cartilage from the humerus and radius tended to be greater for the ad libitum fed boars. Elevation of vitamins and …
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Development and Effectiveness of Three Hydrocolloid-Lipid Emulsion Coatings on Preservation of Quality Characteristics in Green Bell Peppers
… content, surface color, puncture force, pectin (uronic acid) content, ascorbic acid (AA) and dehydroascorbic acid (DHA) content, and cumulative weight loss. No significant differences between coated and uncoated peppers were noted in tests for respiration, puncture force, hue angle, chlorophyll …
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Immunoelectrophoretic Behavior of a Glycoprotein Fraction Isolated From the Fetal Calf Palate
… containing macromolecules including hyaluronic acid, proteinpolysaccharides containing the hondroitin sulfates A, B, and C, the keratan sulfates, and in some cases heparin and heparan sulfate. Chemically, the acid mucopolysaccharides are repeating polymers of a hexosamine and uronic acid, …
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CHEMICAL SYNTHESIS AND BIOLOGICAL EVALUATION OF CHONDROITIN SULFATE DISACCHARIDES
… polysaccharides comprising of repeating uronic acid and amino sugar disaccharide units. Recently, it was shown that the sulfate groups present in chondroitin sulfate GAGs (CS) encode important functional information for the regulation of physiological processes. However, procurement of …
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Studies in molecular structure of plant polysaccharides : exudates from Encephalartos species
… surrounded by a complex structure of sugars and uronic acid residues.
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Efforts towards the synthesis of fully N-differentiated heparin-like glycosaminoglycans; and, Investigations into the mechanism of inactivation of RTPR by gemcitabine triphosphate
… the production of large quantities of protected uronic acid building blocks. An efficient route to methyl 3-0- benzyl-1,2-O-isopropylidene-a-L-idopyranosiduronate from diacetone glucose in nine steps and 36% overall yield is described. Additionally, a general method for the conversion of glycals …
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Cloning and molecular characterisation of four alginate lyase genes from Vibrio midae SY9 : an enteric bacterium from the abalone Haliotis midae
… (M) and its C-5 epimer, -L-guluronate acid (G). These uronic acids are arranged in three different block types in the alginate polymer; poly-M, poly-G or poly-MG. Alginate lyases are enzymes that utilize a -elimination reaction to depolymerise the alginate polymer resulting in cleavage …
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The effect of fire and heat on germination of southeastern United States wildlife food plants with particular emphasis on the genus Cassia
… of protein, and a relatively large amount of a uronic acid in addition to other carbohydrates. This hard seed coat may have been acquired after the seeds were physiologically mature with respect to germination.
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Structural and Metabolic Studies of Glycosaminoglycans (Sulfatase, Hydrazine, Mucopolysaccharidosis)
… with hydrazine (N(,2)H(,4)) followed by nitrous acid (HONO) cleavage of the polymer at pH 4.0. Initial studies with heparin-derived model compounds indicated that ester and N-sulfate substituents were stable during N(,2)H(,4) treatment but that uronic acids were converted to hydrazides which were …
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Structural investigations of the polysaccharide gum exudates from Brabeiurn Stellatifoliurn and Grevillea Robusta
… analysis, Smith-degradation and partial acid hydrolysis revealed small differences in fine structure. Brabeium stellatifolium gum was examined in somewhat more detail. In a study of hydrolysis of the gum by acid the degradation process was followed by gel chromatography. The elution …
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Investigations on the host-parasite interface of a mycoparasite system /
… (17%), chitosan (28.4%), neutral sugars (7.2%),uronic acid (2.4%), proteins (8.2%) and lipids (13.8%). The structure of hyphal walls investigated by electron microscopy of shadowed replicas before and after alkali-acid hydrolysis, showed two distinct regions: microfibrillar and amorphous. The …
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The Role of Plant Chemical Defenses in The Nutritional Ecology of Voles
… showed that plant phenolics (quercetin, tannic acid, and quebracho) can reduce survival and growth of voles. The effects of phenolics were related to molecular structure, and included toxicity, feeding deterrence, and reduction of protein digestibility. Mammalian herbivores detoxicate many …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΚΑΙ ΤΟ ΧΑΡΑΚΤΗΡΙΣΜΟ ΤΗΣ ΕΞΩΚΥΤΤΑΡΙΑΣ ΟΥΣΙΑΣ (SLIME) ΒΑΚΤΗΡΙΑΙΜΙΚΟΥ ΒΛΕΝΝΩΔΟΥΣ ΚΑΙ ΘΥΓΑΤΡΙΚΟΥ ΜΗ ΒΛΕΝΝΩΔΟΥΣ ΣΤΕΛΕΧΟΥΣ PSEUDOMONAS AERUGINOSA
… ANALYSES OF THE MS'S AND RNMV'S SLIME FOR URONIC ACIDS, CARBOHYDRATES, PROTEINS AND LIPIDS WERE 65%, 5.5%, 1.0%, 0.9% AND 16%, 48%, 11% AND 2% OF DRY WEIGHT, RESPECTIVELY. ANTIBODIES TO THE EXTRACELLULAR MATERIAL OF BOTH STRAINS WERE RAISED IN NEW ZEALAND WHITE RABBITS AND CROSS REACTIVITY …
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Factors affecting the nutritional composition and digestibility of corn for silage: Cover crops and cell wall composition
… middle (M), bottom (B), and node (N). The CW, uronic acid (UA), glucose (GLU), and lignin concentrations did not change among phytomers. The concentrations of arabinose (ARA) and xylose (XYL) were greater in the U than in the L phytomers. Concentrations of CW, ARA, and XYL increased from B to T …
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HPLC and mass spectrometry analysis of the free radical degradation of chondroitin sulfate and its implications in osteoarthritis
… yielded an N-acetylgalactosamine (GalNAc) and a uronic acid with varied sulfation. This led us to investigate the possibility of other means of free radical generation with the potential to degrade CS. Alkaptonuria an ultra-rare (1:100000-1:250000) in born error of metabolism resulting in the …
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The development of a process and quality control methods for conjugate vaccine against streptococcus pneumoniae serotype 1
… Analytical tests including size analysis, uronic acid composition, O–acetylation and purity (nucleic acids and protein) were optimized and performed on Pn 1 lots. The purified polysaccharide was found to meet World Health Organisation (WHO) specifications.The purified polysaccharide is …
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Chemical and spectroscopic studies of the capsular polysaccharides of some Klebsiella serotypes
… or be derivatives resulting from conversion of uronic acid to the 4,5-unsaturated analogue where, as found for serotype K64, the mode of cleavage is β-elimination not hydrolysis. The oligosaccharides thus generated have proved to be far more amenable to chemical and spectroscopic studies than …
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Evaluation of the flocculation potential and characterisation of a bioflocculant produced by activated sludge bacteria from Vulindlela Wastewater Treatment Plant
… of carbohydrates (64%), protein (10%) and uronic acid (24%). Fourier transform infrared (FT-IR) analysis revealed stronger intensity of the carboxyl, hydroxyl and amino group as the main fuctional groups of the purified bioflocculant responsible for its high flocculation rate. XDR analysis …
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Production and characterisation of bioflocculant produced by bacterial isolates from Richards Bay harbour, Kwazulu Natal
… in structure, composed of carbohydrates (65%), uronic acid (25%) and trace proteins (10%). Functional groups include hydroxyl, carboxyl, amine, amide and elements such as carbon and oxygen among others, were present in the molecular chain of bioflocculant BA-CGB. No antimicrobial activity was …
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