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Showing 1 to 19 of 19 for “"Avicel"”.
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The purification of C₁ components from the cellulase complex of Trichoderma viride
… with a substrate affinity column, using Avicel as the crystalline cellulose substrate. The resulting Avicel Water Fraction contained essentially all of the recovered C₁ activity and yielded an 8.2 fold purification. The C₁ component was then further purified by chromatography on a weak …
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High-Yield Cellulosic Hydrogen Production by Cell-Free Synthetic Cascade Enzymes: Minimal Bacterial Cellulase Cocktail and Thermostable Polyphosphate Glucokinase
… was investigated on microcrystalline cellulose (Avicel) and regenerated amorphous cellulose (RAC). The optimal ratios for maximum cellulose digestibility were dynamic for Avicel but nearly fixed for RAC. Processive endoglucanase CpCel9 was most important for high cellulose digestibility …
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Novel Carbopol-Wax Blends for Controlled Release Oral Dosage Forms
… in the formulation. Formulations containing Avicel yielded tablets with high hardness and zero order drug release. The drug release pattern of Avicel based formulations was dependent on drug-polymer ratio. Release of Glipizide from Avicel based formulations was dependent on compression force. …
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Modification of natural hydrophilic polymers for use in pharmaceutical formulations
… was examined and compared with lubricated Avicel® 200 and Avicel-Mg silicate co-precipitate. Crushing strength and disintegration-time studies were conducted in order to evaluate tablet properties at different compression pressures. Lubrication of chitin-Mg silicate powder with MgSt was …
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Development and Bioavailability/Bioequivalence of a Fixed-Dose Combination Antiretroviral Reconstitutable Suspension Intended for Pediatrics
… to optimize the levels of the suspending agent (Avicel RC 591) and the anticaking agent (Aerosil 200). Modeling of the formulation viscosity through multiple regression analysis showed that the viscosity was a quadratic function of the concentration of Avicel RC 591. An assessment of the …
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Purification and characterization of fungal β-glucosidase enzymes
… hydrolysis of insoluble cellulosic substrate (Avicel) was investigated using a commercial cellulase mixture (Celluclast 1.5L), where a semi-pure β-glucosidase preparation was added: novel β-glucosidase preparation (NBG (2-S2)) or the reference preparation An Cel3A (Nz188). According to the …
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Preparation of novel modified-release dosage forms of diclofenac sodium and ibuprofen.
… acetate phthalate (CAP), Veegum F® and Avicel PH101® - were added in different proportions to further modify drug release. The diclofenac sodium mini-matrices (4.5 mm in diameter) were produced by the wet granulation method. The release profiles from several encapsulated minimatrices in …
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Herstellung von Pellets durch Extrusion und Spheronisation : systematische Rezepturentwicklung als Grundlage für ein wissensbasiertes System
… abhängig. Als Hauptkomponente wurden Avicel- und Wasseranteil identifiziert. Drei mathematische Modelle zur Prognose des mittleren Pelletdurchmessers wurden entwickelt und verglichen. Das beste Modell basiert auf der experimentellen Bestimmung einiger Stoffkonstanten. Die Rundheit der …
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Purification and properties of a β-1, 4-glucan 4- glucanohydrolase from Trichoderma viride
… activities by the application of Avicel column adsorption chromatography, alkali swollen cellulose column adsorption chromatography, precipitation with ammonium sulfate, rechromatography on alkali swollen cellulose column, and glass paper electrophoresis at pH 4 in that order. The …
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Effects Of De-Polymerization Of Cellulose In Producing Sugar From Cellulosic Biomass At Low-Temperature
… were only 20% yield. Besides cotton fibers, Avicel® PH-101 commercial cellulose, printer paper, luffa, and a cotton t-shirt were also treated with this novel procedure. Acid hydrolysis using 10% HCl and 5% HCl was performed. The results showed that there is almost no glucose conversion …
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Statistically Designed Spheronization and Scale-Up of Ibuprofen Microparticulates Using the Rotor Disk Fluid-Bed Technology: Coating for Prolonged Release and Hard Gelatin Encapsulation of Microparticulates
… delivery. Feasibilty studies using ibuprofen: Avicel (RC-581; 50:50), sodium lauryl sulfate (1%) as surfactant and water as binder in FLM-15 Vector Flo-coater with 12" stainless-steel and waffle-disk inserts showed that amount of binder, plate type and the presence of surfactant affected most …
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Cloned xylanolytic and cellulolytic enzymes from an extreme thermophile
… weight of 84 000. Activities on MUC and Avicel were stable for at least 24 hours at 75°C. The activation energy of the truncated MUCase on MUC was lower (39kJmol⁻¹) than that of the entire protein (55kJmol⁻¹). The two catalytic residues of the exoglycobiohydrolase domain were predicted to …
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Purification and characterization of an endo-1,4-{u03B2}-D-glucanase and two exo-1,4-{u03B2}-D-glucanases from the cellulase system of Trichoderma reesei
… QM 9414 grown on microcrystalline cellulose (Avicel). These three glycoprotein enzymes are the principal components of the cellulase system and constitute <95% of the extracellular protein produced by this organism when grown on cellulose or when incubated in the presence of sophorose …
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Molecular mechanisms behind the adjustment of phototrophic light-harvesting and mixotrophic utilization of cellulosic carbon sources in Chlamydomonas reinhardtii
… materials such as carboxymethyl cellulose, Avicel and filter paper. Furthermore, the results of the present work indicate an assimilation of the breakdown products, in particular cellobiose. Cellulose degradation into cellodextrins (cellobiose-cellopentaose) was shown to be performed by …
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Use of Aloe vera and Aloe marlothii materials as excipients in beads produced by extrusion–spheronization
Microcrystalline cellulose (MCC) is the most commonly used excipient in the manufacture of spherical particles or beads by extrusion spheronisation. However, the use of MCC in beads has its limitations such as prolonged release of drugs due to lack of disintegration. The aim of this study was to …
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Impact of Amphiphiles in Cellulase Stabilization, Recycling and Ethanol Production from Pretreated Biomass
… 17.4%, respectively with no positive impact on Avicel. Consequently 96 h simultaneous saccharification and fermentation (SSF) of these hydrolysates with native S. cereviseae reduced the fermentation period by up to 48 h and increased the theoretical yield of ethanol by 8.48– 33.7% compared to …
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Development and manufacture of novel amorphous Itraconazole drug products using quality by design principles
… oblong ITZ-KOL-ASDs, different proportions of Avicel®pH102 (MCC;10-30%), Tablettose®70 (TAB70; 2.6-32.6%) and KCl (5-15%) were explored, through the mixture design approach. Out of the seven formulation combinations compacted, MCC had a dominant effect on the formulations at higher levels of …
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Feed attractants in aquaculture - the chemical composition of aquacultured Ulva lacinulata (Chlorophyta)
… feet of T. gratilla touched the sample zone (Avicel® bioassay plate) containing an Ulva fraction, placed at the periphery of the tank, while a feed preference was allocated when the sample zone containing an extract was grazed. An urchin can show touch and grazing preference to one or multiple …