HYDROLYSIS PRODUCTS FROM AN EXTRACELLULAR TREMELLA POLYSACCHARIDE

1966 ◽  
Vol 12 (3) ◽  
pp. 495-499 ◽  
Author(s):  
M. E. Slodki
Keyword(s):  
Acid Hydrolysis ◽  
Molar Ratio ◽  
Partial Acid Hydrolysis ◽  
Hydrolysis Products ◽  
Mild Hydrolysis

The composition of an extracellular heteropolysaccharide from Tremella mesenterica Fries NRRL Y-6151 (O-acetyl:xylose:mannose:glucuronic acid molar ratio 0.5:4.4:3.8:1) was investigated by examination of partial acid hydrolysis products. Removal of D-xylose residues by mild hydrolysis gave a polymer containing xylose:mannose:glucuronic acid in a molar ratio of 2.8:3.6:1. More extensive hydrolysis led to the formation of oligosaccharides containing mannosyl units appended to 2-O-(β-D-glucopyranosyluronic acid)-D-mannose.

Structure of an acidic polysaccharide elaborated by Bacilluspolymyxa-1231-ATCC 842

1990 ◽  
Vol 68 (2) ◽  
pp. 323-328 ◽  
Author(s):  
Salah M. Abdel-Kader ◽  
Mohamady A. Issa ◽  
Mohamed A. El-Shafei
Keyword(s):  
Acid Hydrolysis ◽  
Glucuronic Acid ◽  
Molar Ratio ◽  
Side Chains ◽  
Partial Acid Hydrolysis ◽  
Acidic Polysaccharide ◽  
Backbone Chain ◽  
Branched Structure

An extracellular acidic polysaccharide, elaborated by Bacilluspolymyxa, was composed of D-glucose, D-mannose, D-galactose, and D-glucuronic acid (approximate molar ratio of 4:3:1:1). Methylation and fragmentation analysis by partial acid hydrolysis indicated that the polysaccharide had a complicated, highly branched structure, consisting mainly of β(1 → 3) and (1 → 4) D-glycosidic linkages. The backbone chain containing D-glucose, D-mannose, and D-glucuronic acid residues is attached at the C-4, C-3, and C-4 positions, respectively, one out of every three glucose residues being substituted at the C-2 position to form two kinds of branches at the C-2 and C-4 positions, with side chains of single or a few carbohydrate units that are terminated by D-glucose and (or) D-mannose residues. Keywords: acidic polysaccharide, Bacilluspolymyxa.

scholarly journals Effect of Partial Acid Hydrolysis on Precipitin Activity ofAspergillus fumigatusGalactomannan

1968 ◽  
Vol 12 (1) ◽  
pp. 123-124 ◽  
Author(s):  
Osamu Sakaguchi ◽  
Masuko Suzuki ◽  
Katsushi Yokota
Keyword(s):  
Acid Hydrolysis ◽  
Partial Acid Hydrolysis

A POLYSACCHARIDE FROM THE BLUE-GREEN ALGA, ANABAENA CYLINDRICA

1954 ◽  
Vol 32 (11) ◽  
pp. 999-1004 ◽  
Author(s):  
C. T. Bishop ◽  
G. A. Adams ◽  
E. O. Hughes
Keyword(s):  
Acid Hydrolysis ◽  
Fresh Water ◽  
Green Alga ◽  
Culture Medium ◽  
Glucuronic Acid ◽  
Molar Ratio ◽  
Blue Green Alga ◽  
Anabaena Cylindrica ◽  
Chemical Homogeneity ◽  
Fresh Water Alga

A complex polysaccharide has been isolated from the fresh-water alga, Anabaena cylindrica, grown in a synthetic culture medium. Prolonged acid hydrolysis yielded glucose, xylose, glucuronic acid, galactose, rhamnose, and arabinose in a molar ratio of 5: 4: 4: 1: 1: 1. Chemical fractionations of the polysaccharide material from solution in cupriethylenediamine, and of its acetate from organic solvents indicated chemical homogeneity.

scholarly journals HPTLC determination of diosgenin in fenugreek seeds

2018 ◽  
Vol 68 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Barbara Król-Kogus ◽  
Khenifi Mohammed Lamine ◽  
Piotr Migas ◽  
Messaoud Boudjeniba ◽  
Mirosława Krauze-Baranowska
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Methanolic Extract ◽  
Soxhlet Extraction ◽  
African Origin ◽  
Fenugreek Seeds ◽  
Hydrolysis Products ◽  
Hydrolysis Of

Abstract A new HPTLC-densitometric method for diosgenin determination in fenugreek seeds was established after optimization of the conditions for efficient saponin extraction and acid hydrolysis. Several procedures were tested, the best of which was a three-step Soxhlet extraction, followed by hydrolysis of the obtained methanolic extract with 2 mol L-1 H2SO4. Best diosgenin separation from other hydrolysis products was obtained on HPTLC Si60F254 plates u sing a mixture of n-heptane/ethyl acetate (7:3, V/V) and modified anisaldehyde as a spraying reagent. The method was preliminarily validated and the determined amounts of diosgenin in fenugreek seeds of Polish and African origin were found to be similar and ranged from 0.12-0.18 %.

Acid hydrolysis products of DDD and DDT precursors

1973 ◽  
Vol 38 (4) ◽  
pp. 835-838 ◽  
Author(s):  
Bruce L. Jensen ◽  
Raymond E. Counsell
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Products

Phosphopeptides Obtained by Partial Acid Hydrolysis of α-Casein2

1957 ◽  
Vol 79 (10) ◽  
pp. 2559-2565 ◽  
Author(s):  
N. J. Hipp ◽  
M. L. Groves ◽  
T. L. McMeekin
Keyword(s):  
Acid Hydrolysis ◽  
Partial Acid Hydrolysis ◽  
Hydrolysis Of

scholarly journals Preparation of a Novel Glucuronomannan from Auricularia Auricala and its Immunological Activity

2012 ◽  
Vol 7 (11) ◽  
pp. 1934578X1200701 ◽  
Author(s):  
Zonghong Li ◽  
Dan Jiang ◽  
Hongtao Bi ◽  
Dazheng Liu ◽  
Sungju Jang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Acid Hydrolysis ◽  
Lymphocyte Proliferation ◽  
B Lymphocyte ◽  
Glucuronic Acid ◽  
Hot Water ◽  
Immunological Activity ◽  
Partial Acid Hydrolysis ◽  
Ft Ir

A glucuronomannan (AA-4-H, Mw around 4 KDa) was prepared from the fruit bodies of Auricularia auricala by extraction with hot water, deproteination by Sevag reagent, stepwise precipitation with ethanol and partial acid hydrolysis. Monosaccharides analysis revealed that AA-4-H consisted of 91% mannose (Man) and 9% glucuronic acid (GlcA). FT-IR, NMR and methylation analyses indicated that AA-4-H is a branched glucuronomannan. Its main chains are composed of 1, 3-linked α-Man p, side chains are single α-Man p or α-GlcA residues attached to the O-2 and O-6 of Man residues of the main chains. Bioassay indicated that AA-4-H remarkably enhanced B lymphocyte proliferation and increased the production of nitric oxide of macrophages in vitro. Thus, glucuronomannan AA-4-H could be explored as a potential immunostimulation agent.

Structural studies on cross-linked peptides containing lysinonorleucine from elastin of porcine aorta

1977 ◽  
Vol 55 (3) ◽  
pp. 244-248
Author(s):  
Maonique Davril ◽  
Kia-Ki Han
Keyword(s):  
Acid Hydrolysis ◽  
Structural Studies ◽  
Cross Link ◽  
Structural Investigations ◽  
Partial Acid Hydrolysis

Three lysinonorleucine peptides were isolated from mature porcine aorta elastin after enzymic digestions and partial acid hydrolysis. The structural investigations which were performed suggest that different regions containing lysinonorleucine may exist. The role of this cross-link in mature elastin is discussed.

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