Archive for the ‘for26cat’ Category
Saturday, June 28th, 2008
Methanogenesis from volatile fatty acids in downflow stationary fixed-film reactor.
Methanogenesis was studied in downflow stationary fixed-film bioreactors. The support materials in this study included ceramic Raschig rings, hardwood chips, and sized charcoal. The performances of these support materials have been compared using both synthetic acid ...
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Saturday, June 28th, 2008
The effect of temperature and pH on ethanol production by free and immobilized cells of Kluyveromyces marxianus grown on Jerusalem artichoke extract.
The effect of temperature and pH on the kinetics of ethanol production by free and calcium alginate immobilized cells of Kluyveromyces marxianus grown on ...
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Saturday, June 28th, 2008
Cell cycle analysis of plasmid-containing Escherichia coli HB101 populations with flow cytometry.
The relationship between cell mass and cell number dynamics for bacteria such as Escherichia coli depends on the cell cycle parameters C and D. Effects of plasmid copy number on these cell cycle parameters ...
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Saturday, June 28th, 2008
Stratified ecology techniques in the startup of an anaerobic downflow fixed film percolating reactor.
A two-column pilot scale downflow percolating fixed film (DPFF) anaerobic reactor treating deproteinized cheese whey (DPW) was used in this study. The system was operated at one-third of the maximum working volume ...
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Saturday, June 28th, 2008
Combined submerged and solid substrate fermentation for the bioconversion of lignocellulose.
A novel two-stage bioreactor has been designed for a combined submerged (SF) and solid substrate fermentation (SSF) of wheat straw. The straw was pretreated with steam, and cellulases from the culture fluid of Trichoderma reesei ...
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Saturday, June 28th, 2008
Biomass retention and performance of anaerobic fixed-film reactors treating acetic acid wastewater.
An acetic-acid-based synthetic wastewater of different organic concentrations was successfully treated at 35 degrees C in anaerobic downflow fixed-film reactors operated at high organic loading rates and short hydraulic retention times (HRTs). Substrate removal ...
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Saturday, June 28th, 2008
Gibberellic acid by solid state fermentation: Consistent and improved yields.
Five strains each of Gibberella fujikuroi and Fusarium monoliforme were screened to select G. fujikuroi P-3, a strain capable of giving consistent production of gibberellic acid (GA(3)) by solid state fermentation (SSF). The comparative production of ...
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Saturday, June 28th, 2008
Lipase-catalyzed ester exchange reactions in organic media with controlled humidity.
Immobilized lipase activity is studied in organic solvent systems of controlled water content under the influence of a variety of reaction parameters, such as temperature, relative humidity, substrate concentrations, and type of fatty acid used. Control ...
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Saturday, June 28th, 2008
Adsorption and kinetic behavior of purified endoglucanases and exoglucanases from Trichoderma viride.
Adsorption on crystalline cellulose of six endoglucanases (Endo I, II, III, IV, V and VI; 1, 4-beta-D-glucan glucanohydrolase, EC 3.2.1.4) and two exoglucanases (Exo II and III; 1,4-beta-D-glucan cellobiohydrolase, EC 3.2.1.92), purified from a ...
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Saturday, June 28th, 2008
Immobilized heparinase: In vitro reactor model.
Heparinase immobilized to agarose has previously been shown to be useful in degrading heparin and thereby preventing thromboembolytic complications when this anticoagulant has been used in extracorporeal perfusions. The current study examined the kinetics of this immobilized enzyme. When heparinase ...
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Saturday, June 28th, 2008
Novel anaerobic gas-lift reactor (AGLR) with retention of biomass: Start-up routine and establishment of hold up.
A start-up routine for a novel type of anaerobic gas-lift reactor using sand as support particles for Bacterial adhesion and involving a dilution rate shift-up is shown to result in ...
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Saturday, June 28th, 2008
Amylolysis of raw corn by Aspergillus niger for simultaneous ethanol fermentation.
The novelty of this approach was hydrolysis of the raw starch in ground corn to fermentable sugars that are simultaneously fermented to ethanol by yeast in a non-sterile environment. Thus, the conventional cooking step can ...
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Saturday, June 28th, 2008
Dynamic analysis of irreversible adsorption of protein on porous polymer resins as studied by pulse injection method.
Irreversible adsorption of bovine serum albumin onto porous polymer resins is examined by a pulse injection method. The experimental results are theoretically analyzed by a model based on the ...
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Saturday, June 28th, 2008
Co-operative binding interactions in affinity chromatography: Theoretical considerations.
A theoretical relationship has been developed to allow the effect of free ligand concentration on the capacity of an affinity Chromatography matrix to be determined where the protein adsorbed shows co-operative binding. Computer simulations using literature values for ...
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Saturday, June 28th, 2008
Distribution of heparinase covalently immobilized to agarose: Experimental and theoretical studies.
An immobilized enzyme reactor has been developed to remove heparin, the anticoagulant that is required in all extracorporeal devices for patients undergoing open-heart surgery or kidney dialysis. The device uses the enzyme heparinase (EC 4.2.2.7), ...
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Saturday, June 28th, 2008
Unsteady-state operation of continuous fermentor for enhancement of cell mass production.
The transient behavior of continuous fermentation is studied concentrating on the time scale intrinsic to the system. The time scale is the time required for the fermentorto reach a stable steady state after the disturbance ...
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Saturday, June 28th, 2008
A comparison of some methods of estimating volumetric mass-transfer coefficients in an external-loop airlift fermenter.
Volumetric mass-transfer coefficients were measured in an 11-L external-loop airlift fermenter with deionized water, a fermentation medium, and during a fermentation. Both a Mackareth oxygen electrode and a novel rapid-response probe ...
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Saturday, June 28th, 2008
Studies on a wild strain of Schizophyllum commune: Cellulase and xylanase production and formation of the extracellular polysaccharide Schizophyllan.
A wild strain of schizophyllum commune (Fr:Fr:) isolated in Bangladesh produced cellulase and xyianase in high yields as well as the exobiopolymer schizophyllan. It was found experimentally ...
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Saturday, June 28th, 2008
The use of rotifers for the maintenance of monoalgal mass cultures of Spirulina.
Zooplankton was successfully used for the biological control of unicellular algal contaminants in Spirulina mass cultures even under conditions adverse to the growth of Spirulina (maximal winter daily temperature of approximately 10 degrees ...
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Saturday, June 28th, 2008
Continuous assay of neuraminidase activity by a bienzyme system immobilized in an artificial membrane.
Lactate dehydrogenase and NANA-lyase were immobilized in an artificial gelantine membrane. This bienzyme system was used for continuous assay of neuraminidase activity. The K\'(m) of the active membrane for lactate dehydrogenase and ...
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Saturday, June 28th, 2008
The electrochemical regeneration of NAD(+) revisited.
An actual yield of 99.97% (i.e., 3000 potential regenerating cycles) has been obtained for the electrochemical regeneration of NAD(+). The deactivation of the coenzyme is not related to the number of cycles; it is only time dependent. For biotechnological applications, ...
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Saturday, June 28th, 2008
An investigation of a fertilizer-tap water medium for mass algal production in outdoor plastic-enclosed systems.
The feasibility of using two fertilizers (urea plus superphosphate) in tap water as a medium for the mass culture of green algae (Scenedesmus and Ankistrodesmus) in outdoor plastic-enclosed minipond systems was ...
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Saturday, June 28th, 2008
Esophagitis and esophageal strictures.
Esophagitis and esophageal strictures are relatively uncommon but significant diseases in companion animals. Often, an esophageal disorder is suspected on the animal\'s medical history and clinical signs. Esophagitis and acquired esophageal strictures are caused by prolonged contact of caustic substances or foreign ...
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Saturday, June 28th, 2008
Understanding behavior-aggressive dogs: assessment and treatment considerations.
The question of what to do with an aggressive dog involves clinical, legal, and ethical considerations. This first column on the subject addresses the clinical aspects from the standpoint of the general veterinarian.
Crowell-Davis SL.
The University of ...
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Saturday, June 28th, 2008
Continuous renal replacement therapy.
Continuous renal replacement therapy (CRRT) is a blood purification modality that uses a combination of convection and diffusion to eliminate uremic toxins and correct electrolyte imbalances. Although CRRT is usually associated with the treatment of acute renal failure, it can also be ...
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