scholarly journals Mushrooms of genus Pleurotus as a source of dietary fibres and glucans for food supplements

2009 ◽  
Vol 26 (No. 6) ◽  
pp. 441-446 ◽  
Author(s):  
A. Synytsya ◽  
K. Míčková ◽  
I. Jablonský ◽  
M. Sluková ◽  
J. Čopíková
Keyword(s):  
Cell Wall ◽  
Enzymatic Hydrolysis ◽  
Food Quality ◽  
Pleurotus Ostreatus ◽  
Dry Matter ◽  
Pleurotus Eryngii ◽  
Food Supplements ◽  
Enzymatic Analysis ◽  
Dietary Fibres ◽  
Hydrolysis Of

Fruit bodies (separately pilei and stems) of mushrooms <i>Pleurotus ostreatus</i> (four strains) and <i>Pleurotus eryngii</i> were characterised as a source of polysaccharides. The contents of glucans and dietary fibres were determined with using the respective Megazyme enzymatic kits. Enzymatic analysis of the fruit bodies confirmed significant differences in the contents of these components among the species and strains. The stems contained more insoluble dietary fibres than the pilei in all the cases and more β-glucans in most cases. However, relatively high contents of β-glucan (20–50% of dry matter) could be a result of incomplete enzymatic hydrolysis of insoluble α-1,3-glucans. Nevertheless, low food quality stems of mushrooms <i>Pleurotus</i> sp. could be a valuable source of cell wall glucans for the preparation of food supplements.

Synergetic Dissolution of Branched Xylan and Lignin Opens the Way for Enzymatic Hydrolysis of Poplar Cell Wall

2018 ◽  
Vol 66 (13) ◽  
pp. 3449-3456 ◽  
Author(s):  
Xia Zhou ◽  
Dayong Ding ◽  
Tingting You ◽  
Xun Zhang ◽  
Keiji Takabe ◽  
...  
Keyword(s):  
Cell Wall ◽  
Enzymatic Hydrolysis ◽  
Hydrolysis Of ◽  
The Way

Effect of steam explosion pretreatment on treatment with Pleurotus ostreatus for the enzymatic hydrolysis of rice straw

2010 ◽  
Vol 110 (4) ◽  
pp. 449-452 ◽  
Author(s):  
Masayuki Taniguchi ◽  
Daisuke Takahashi ◽  
Daisuke Watanabe ◽  
Kenji Sakai ◽  
Kazuhiro Hoshino ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Pleurotus Ostreatus ◽  
Steam Explosion ◽  
Steam Explosion Pretreatment ◽  
Hydrolysis Of

Diversity of Cell Wall Composition and Saccharides Production with H2SO4 Pretreatment in Bioenergy Material: Miscanthus

2014 ◽  
Vol 670-671 ◽  
pp. 193-196
Author(s):  
Ning Xu ◽  
Ben Lin Dai ◽  
Zhen Wu ◽  
Fei Hu Mu ◽  
Ji Ming Xu
Keyword(s):  
Cell Wall ◽  
Enzymatic Hydrolysis ◽  
Cell Wall Composition ◽  
Bioenergy Crop ◽  
Significant Difference ◽  
Hydrolysis Of ◽  
Supernatant Solution

Miscanthus is a high yielding bioenergy crop which has been tested as substrate for the bioprocess. In this study, we selected four typical pairs of Miscanthus samples which present different cell wall compositions. The sample shows significant difference in saccharine production with different concentration pretreatment of H2SO4(0.5%, 1.0%, and 4.0%). Much more pentose (about 15.0% -30.0%) was extracted in the supernatant solution; and no significant difference between four species. The hexose yield of all samples is disciplinary and not in order. Direct enzymatic hydrolysis of the H2SO4presoaked biomass was found to give higher hexose yields of 6.0%–13.0%, but low pentose yields of 1.5%–3.0%.Higher H2SO4concentration resulted in more hexose, but less pentose in enzymatic hydrolysis, while they exhibit good tendency in saccharin yields between four typical pairs.

scholarly journals Dry matter and relative sugar yield from enzymatic hydrolysis of maize whole plants and cobs

2012 ◽  
Vol 131 (2) ◽  
pp. 286-292 ◽  
Author(s):  
Marvin Paul Scott ◽  
Kenneth Byrnes ◽  
Michael Blanco
Keyword(s):  
Enzymatic Hydrolysis ◽  
Dry Matter ◽  
Sugar Yield ◽  
Whole Plants ◽  
Hydrolysis Of

The effect of harvest time, dry matter content and mechanical pretreatments on anaerobic digestion and enzymatic hydrolysis of miscanthus

2016 ◽  
Vol 218 ◽  
pp. 1008-1015 ◽  
Author(s):  
Susanne Frydendal-Nielsen ◽  
Maibritt Hjorth ◽  
Sanmohan Baby ◽  
Claus Felby ◽  
Uffe Jørgensen ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Enzymatic Hydrolysis ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Harvest Time ◽  
Hydrolysis Of

Compositional studies on the cell walls of the synnema and vegetative hyphae of Ceratocystis ulmi

1973 ◽  
Vol 51 (6) ◽  
pp. 1147-1153 ◽  
Author(s):  
James L. Harris ◽  
Willard A. Taber
Keyword(s):  
Electron Microscopy ◽  
Amino Acids ◽  
Cell Wall ◽  
Enzymatic Hydrolysis ◽  
Cell Walls ◽  
Amino Sugar ◽  
Fibrillar Structure ◽  
Dense Granules ◽  
Hyphal Wall ◽  
Hydrolysis Of

The composition of the cell walls of synnemal and vegetative hyphae of Ceratocystis ulmi was studied by fractionation and assay of released compounds. Residues after enzymatic hydrolyses were examined by electron microscopy. The synnemal wall was found to have 67% carbohydrate, 4.52% amino sugar, 5.02% protein, 1.6% lipid, and 0.59% ash, which accounted for 78.7% of the cell wall. The vegetative hyphal wall contained 56% carbohydrate, 3.44% amino sugar, 7.92% protein, 4.5% lipid, and 1.45% ash, which totaled 73.3% of the wall weight. Sugars identified were D-glucose, D-mannose, D-galactose, and L-rhamnose. Enzymatic hydrolysis of both wall types by cellulase and laminaranase indicated the presence of beta-1,3 and beta-1,4 linkages of glucose polymers. N-acetylglucosamine was liberated by chitinase. Most of the 16 amino acids detected in each wall type were at least twice as abundant in vegetative hyphal walls as in synnemal hyphal walls. Cellulase and laminaranase treatment of cell walls revealed a fibrillar structure. Chitinase-treated walls did not appear as fibrous, suggesting that the fibrous structure may be mostly chitinous. Synnemal cell walls are covered by electron-dense granules which may correspond to the pigment in the synnemal hyphae.

scholarly journals INFLUENCE OF HYDROLYTIC TREATMENT ON THE CONTENT OF REDUCING SUBSTANCES IN NEUTRAL-SULPHITE ALKALI

2021 ◽  
pp. 309-317
Author(s):  
Leysan Azatovna Mingazova ◽  
Yelena Vyacheslavovna Kryakunova ◽  
Zosia Albertovna Kanarskaya ◽  
Альберт Владимирович Kanarskiy ◽  
Igor' Vadimovich Kruchina-Bogdanov ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Enzymatic Hydrolysis ◽  
Acid Hydrolysis ◽  
Dry Matter ◽  
Gas Liquid Chromatography ◽  
Birch Wood ◽  
Carbohydrate Composition ◽  
Enzyme Preparations ◽  
Reducing Substances ◽  
Hydrolysis Of

The aim of this work is to develop a technology for the preparation of neutral-sulfite liquors formed during the production of fibrous semi-finished products - cellulose from birch wood - for subsequent use as a nutrient medium for the cultivation of microorganisms. Acid hydrolysis was carried out at a temperature of 100 °С at a ratio of a 10% sulfuric acid solution to a liquor sample of 1 : 1. Enzymatic hydrolysis of neutral sulfite liquors was carried out with the enzyme preparations Accellerase XY and Accellerase XC at 50±2 °C and 60±2 °C. The end of hydrolysis was determined by the cessation of the increase in the content of reducing substances (RS) in the hydrolyzate. The original neutral sulphite lye contained 9.4% dry matter, 21.7 g/l of reducing substances, pH 5.3±0.2. It has been shown that as a result of enzymatic hydrolysis, the content of insoluble dry residue in the hydrolyzate decreases to 8.32% and 8.41%, respectively, and during acid hydrolysis – to 7.8%. The content of RS in neutral sulfite lye after acid hydrolysis increases by an average of 3 times, while after enzymatic hydrolysis - a maximum of 2 times. It was found by gas-liquid chromatography that pentoses predominate in the obtained hydrolysates. Microbiological processing of media with a similar carbohydrate composition is possible by a number of strains of microorganisms capable of assimilating pentoses, for example, yeast-like fungi of the Saccharomycetaceae family and bacteria of the Enterobacteriaceae family.

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