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Interactions of Trichoderma reesei exo-acting cellulases with p-aminophenyl 1-thio-β-D-cellobioside

Creator:: Piyachomkwan, Kuakoon
Abstract:: Cellulolytic enzymes capable of efficiently degrading crystalline cellulose are a complex mixture of endo- (endoglucanases) and exo-acting (cellobiohydrolases) enzymes. One approach to separating these enzymes is affinity chromatography. A new ligand, p-aminophenyl l-thio-β-D-cellobioside (APTC), is introduced for this purpose. The property of APTC in affinity chromatography is demonstrated using Trichoderma...
Resource Type:: Dissertation
Full Text:: -Cellobioside. Abstract approved: ,__ Michael H. Penner Cellulolytic enzymes capable of efficiently

Immobilized cellooligosaccharides in the study of trichoderma reesei cellobiohydrolases

Creator:: Sangseethong, Kunruedee
Abstract:: A novel type of model substrates, i.e. immobilized p-aminophenyl-β-D-cellooligosaccharides, was developed and used in the study of exocellulases. The two major cellobiohydrolases from Trichoderma reesei, CBH I and CBH II were used as representative enzymes. p-Aminophenyl derivatives of cellobiose (PAPG₂), cellotriose (PAPG₃), and cellotetraose (PAPG₄) were synthesized from the reaction...
Resource Type:: Dissertation
Full Text:: . First and foremost, I would like to thank Dr. Michael H. Penner, my major advisor for his kindness

In Vitro fermentation of dietary cellulose by human fecal microorganisms

Creator:: Chang, Hung-pi
Abstract:: The purpose of the study was to set up an in vitro model of the colon which would permit the analysis of cellulose fermentation by human colonic microflora. Studies of the degradation of polysaccharides by colonic bacteria may help to explain the observed physiological consequences of consuming dietary fiber common...
Resource Type:: Masters Thesis
Full Text:: approved: . .. _, ^^ ^ - Michael H. Penner The purpose of the study was to set up an

A filter paper assay for low cellulase activities and the cultivation of Trichoderma reesei on acid whey and sweet whey permeate

Creator:: Nordmark, Tor Soren
Abstract:: The traditional filter paper assay for saccharifying cellulase originally described by M. Mandels et al (1976) has been modified to make possible low activity determinations of Trichoderma cellulases. The enzymatic activity appears to decline during a prolonged incubation period if no precautions have been taken. By means of adding bovine...
Resource Type:: Masters Thesis
Full Text:: Acknowledgement I wish to thank Dr. Michael Penner for encouragement and supportive ideas throughout the

Characterization of substrate-velocity relationships for the cellulase enzyme complex from Trichoderma viride

Creator:: Liaw, Ean-Tun
Abstract:: The influence of substrate and enzyme concentration on the rate of saccharification of two defined, insoluble, cellulose substrates, Avicel and Solka-Floc, by the cellulase enzyme system of Trichoderma viride has been evaluated. Assays utilized enzyme concentrations ranging from 0.014 to 0.056 filter paper unit per mL and substrate concentrations up...
Resource Type:: Masters Thesis
Full Text:: Complex from Trichoderma viride. Abstract approved: , . _ .. ... rr —.—^=— ^ ^ Michael H

Salt and polyelectrolyte affect on food colloid function : polygalacturonic acid and egg albumen case studies

Creator:: Chen, Chi-Shen
Abstract:: The primary purpose of this study was to try to (1) provide information on the chemical nature, including turbidity formation, of polygalacturonic acid in different concentrations of NaCl solution. (2) use turbidity formation characteristics to develop an assay for determining the activities polygalacturonic acid depolymerases by using a polyelectrolyte. (3)...
Resource Type:: Dissertation
Full Text:: 2007 ACKNOWLEDGEMENTS I would like to thank my major professor, Dr. Michael H. Penner

Porosity, surface area and enzymatic saccharification of microcrystalline cellulose

Creator:: Tantasucharit, Usicha
Abstract:: The research described in this thesis was aimed at understanding how particle size, porosity, and enzyme accessible surface area influence the rate of saccharification of microcrystalline cellulose. Microcrystalline cellulose (MCC) is a commonly used substrate for the study of cellulolytic enzymes. MCC preparations of different particle size are commercially available....
Resource Type:: Masters Thesis
Full Text:: : .. Michael H. Penner The research described in this thesis was aimed at understanding how particle size

Initial velocity analyses of milling effects on rates of enzyme-catalyzed saccharification of native wheat straw

Creator:: Nguyen, Quynh M.
Abstract:: There is considerable interest in developing environmentally friendly processes for the economical conversion of biomass plant material to biofuels, bioproducts and biomaterials. One approach to such a conversion process is to make use of enzymes for the conversion of plant polysaccharides to simple sugars; the simple sugars could then be...
Resource Type:: Masters Thesis
Full Text:: I would like to thank Dr. Michael Penner for his support and patience in consulting and helping me

The relative activity of the cellulase enzyme system of Trichoderma reesei with native and modified cellulosic substrates

Creator:: Liaw, Ean-Tun
Resource Type:: Dissertation
Full Text:: 16.1994 Typed by Ean-Tun Liaw ACKNOWLEDGEMENT I would like to thank Dr. Michael H. Penner for his

Preparation and modification of cellooligosaccharides

Creator:: Akpinar, Ozlem
Abstract:: Cellooligosaccharides are the reaction intermediates produced during the hydrolysis of cellulose to glucose. Hence, they have the same chemical structure as cellulose, just shorter chain lengths. Cellooligosaccharides up to DP eight are soluble in water. The soluble cellooligosaccharides can be used "as is" in the food industry as non-digestible oligosaccharides...
Resource Type:: Dissertation
Full Text:: . Michael H. Penner, for his time and support throughout my study. I owe special thanks to Dr. Robert J

ScholarsArchive@OSU

Interactions of Trichoderma reesei exo-acting cellulases with p-aminophenyl 1-thio-β-D-cellobioside

Immobilized cellooligosaccharides in the study of trichoderma reesei cellobiohydrolases

In Vitro fermentation of dietary cellulose by human fecal microorganisms

A filter paper assay for low cellulase activities and the cultivation of Trichoderma reesei on acid whey and sweet whey permeate

Characterization of substrate-velocity relationships for the cellulase enzyme complex from Trichoderma viride

Salt and polyelectrolyte affect on food colloid function : polygalacturonic acid and egg albumen case studies

Porosity, surface area and enzymatic saccharification of microcrystalline cellulose

Initial velocity analyses of milling effects on rates of enzyme-catalyzed saccharification of native wheat straw

The relative activity of the cellulase enzyme system of Trichoderma reesei with native and modified cellulosic substrates

Preparation and modification of cellooligosaccharides

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