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Full-Text Articles in Medicine and Health Sciences

Optimization Of Solid-State Fermentation Parameters For The Production Of Xylanase By Trichoderma Longibrachiatum On Wheat Bran, Elizabeth R. Ridder, Sue E. Nokes, Barbara L. Knutson Sep 1998

Optimization Of Solid-State Fermentation Parameters For The Production Of Xylanase By Trichoderma Longibrachiatum On Wheat Bran, Elizabeth R. Ridder, Sue E. Nokes, Barbara L. Knutson

Biosystems and Agricultural Engineering Faculty Publications

Solid-state fermentation has the potential to produce inexpensive enzymes for use in high-volume industrial applications. Process parameters such as substrate moisture content and length of fermentation can have a significant effect on the amount and timing of enzyme production. This study was conducted in two stages, a screening stage and an optimization stage, to determine the effects of moisture content of the substrate, surfactant addition upon inoculation, depth of the substrate, and duration of fermentation on xylanase activity produced by Trichoderma longibrachiatum. Screening fermentations were conducted at 25°C, 50 and 75% wet basis moisture content (w.b.), 0.0 and 0.2% …


Vasodilators Activate Erythrocyte K-Cl Cotransport, Norma C. Adragna, H. Ahmed, Peter K. Lauf Feb 1998

Vasodilators Activate Erythrocyte K-Cl Cotransport, Norma C. Adragna, H. Ahmed, Peter K. Lauf

Pharmacology and Toxicology Faculty Publications

No abstract provided.


Significance Of The Kccl Cytoplasmic Cooh-Terminal Fragment For The Ph Dependence Of K-Cl Cotransport In Transfected Human Embryonic Kidney Cells, Norma C. Adragna, Jin Zhang, Peter K. Lauf Jan 1998

Significance Of The Kccl Cytoplasmic Cooh-Terminal Fragment For The Ph Dependence Of K-Cl Cotransport In Transfected Human Embryonic Kidney Cells, Norma C. Adragna, Jin Zhang, Peter K. Lauf

Pharmacology and Toxicology Faculty Publications

No abstract provided.


Phenmedipham Process Development, Maura Byrne Jan 1998

Phenmedipham Process Development, Maura Byrne

Masters

The objective of this work was to investigate the process for the production of an organic herbicide, phenmedipham, utilising isobutylacetate as solvent and to scale up the reaction to one litre. This was carried out according to a technical bulletin received from Barclay Plant Protection Ltd. Difficulties were encountered in isolating the product, methyl N-(3-hydroxyphenyl) carbamate, from stage 1 with isobutylacetate as solvent. An investigation of the use of other solvents for the reaction process led to the use of ethyl acetate, in a modified version of the method used by Schering A-G, and resulted in a 93% yield of …


In Vitro Anti-Hepatitis B Virus Activities Of 5’-O-Myristoyl Analogue Derivatives Of 3’-Fluoro-2’,3’-Dideoxythymidine (Flt) And 3’-Azido-2’,3’- Dideoxythymidine (Azt), Keykavous Parang, Leonard I. Wiebe, Edward E. Knaus, Jyy-Shiang Huang, David L. Tyrrell Jan 1998

In Vitro Anti-Hepatitis B Virus Activities Of 5’-O-Myristoyl Analogue Derivatives Of 3’-Fluoro-2’,3’-Dideoxythymidine (Flt) And 3’-Azido-2’,3’- Dideoxythymidine (Azt), Keykavous Parang, Leonard I. Wiebe, Edward E. Knaus, Jyy-Shiang Huang, David L. Tyrrell

Pharmacy Faculty Articles and Research

The objective of this study was to evaluate a dual action prodrug concept wherein an unnatural myristic acid analogue is coupled via an ester moiety to the 5’-position of FLT or AZT. Subsequent intracellular cleavage of the prodrug ester would simultaneously release FLT or AZT that could inhibit reverse transcriptase (RT), and the myristic acid analogue that could inhibit myristoyl- CoA:protein N-myristoyltransferase (NMT). Methods: Cytotoxicity (2.2.15 cell culture), and antihepatitis B activity of 5’-O-myristoyl analogue prodrug derivatives of FLT and AZT (2-8) were evaluated in vitro using human liver hepatitis B virus (HBV) producing 2.2.15 cell lines. Results: The 5’- …