Showing papers in "Process Biochemistry in 2003"

TL;DR: This review focuses on the microbial amylases and their application with a biotechnological perspective and α-Amylase holds the maximum market share of enzyme sales with its major application in the starch industry as well as its well-known usage in bakery.

TL;DR: In this paper, the batch kinetic sorption of copper ions and dyes onto two low-cost biosorbents, peat and pith, has been studied and a model based on the assumption of a pseudo-second-order mechanism has been developed to predict the rate constant of sorption, the equilibrium capacity and initial sorption rate with the effect of initial concentration, particle size, temperature and sorbent concentration dose.

TL;DR: Analysis of variance (ANOVA) of face-centered central composite design showed a high coefficient of determination (R2) value of 0.9473, thus ensuring a satisfactory adjustment of the quadratic model with the experimental data.

TL;DR: In this article, the adsorption kinetics and isotherms of methylene blue (MB) on raw and thermally activated date pits, an agricultural solid waste, were investigated.

TL;DR: In this paper, a thermostable α-amylase producing Bacillus sp. ANT-6 was isolated from soil samples and the enzyme showed optimum activity at pH 10.5 and 80.5.

TL;DR: This short review highlights progress on purification and understanding the biochemical aspects of microbial pectinases.

TL;DR: In this article, the authors present an experimental study and mathematical analysis of how reaction kinetics of enzymatic cellulose hydrolysis are influenced by the changing dynamics and nature of interactions between enzymes, cellulose substrate, products (reducing sugars), and non-hydrolytic materials in a heterogeneous solid-liquid reaction system.

TL;DR: In this article, the adsorption properties of Myriophyllum spicatum for lead, zinc, and copper were investigated and the results were compared with other aquatic submerged plants.

TL;DR: Phenol degradation by Pseudomonas putida CCRC14365 and cell growth kinetics were compared between the free and Ca-alginate gel-immobilized systems and implied that the occurrence of medium diffusion resistance in the immobilized systems, which retarded the degradation reaction, might be useful for detection of the intermediates.

TL;DR: Leaf biomass was found to be a more suitable substrate compared to pseudostems for enzyme production and very low levels of cellulolytic enzyme activities were detected compared to lignin degrading enzymes by both the organisms.

TL;DR: In this paper, the effect of copper(II), lead(II) and chromium(VI) ions on the growth and bioaccumulation properties of Aspergillus niger was investigated as a function of initial pH and initial metal ion concentration.

TL;DR: In this article, the removal of copper(II) ions from aqueous solutions on the cone biomass of Thuja orientalis has been studied by using batch adsorption techniques.

TL;DR: The use of air as the purging gas, providing a stronger oxidising environment to both strains, gives a higher catalytic effect on bacteria inactivation than that of nitrogen.

TL;DR: In this article, the growth and reactive dye bioaccumulation properties of Saccharomyces cerevisiae growing in molasses medium was investigated in a batch system as a function of dye, initial pH and initial dye concentration.

TL;DR: In this article, the production of extracellular α-amylase by thermotolerant Bacillus subtilis was studied in solid state fermentation (SSF) and the effect of wheat bran (WB) and rice husk (RH) was examined.

TL;DR: Newly isolated microbes, which produce cellulase-free xylanases and are easily grown using a low-cost agricultural waste substrate were investigated and matched the following industrial requirements.

TL;DR: In this paper, the authors investigated the nickel-II ion uptake by deactivated protonated yeast with respect to the initial pH and initial metal ion concentration and found that the rate constant, the equilibrium sorption capacity and the initial sorption rate were reported.

TL;DR: In this paper, the effect of supplementary nutrients on neomycin production was studied using Streptomyces marinensis NUV-5 in solid-state fermentation, and the optimum conditions were dextrin 14.1 g kg − 1 rawa, raspberry seed powder 64.91 g kg−1 rava, and mineral salt solution 172.6 ml kg −1 rawa.

TL;DR: A biofiltration system using peat as solid support inoculated with Thiobacillus thioparus was developed for treating a gaseous stream containing high concentrations of H2S, and Mathematical modelling based on Ottengraf's model enabled a prediction of the performance of the biofilter.

TL;DR: The role of β-glucosidase in the mobilization of phenolic antioxidants by hydrolysis of the glycosides was also investigated in cranberry pomace processed by solid state growth using food grade fungus Lentinus edodes as discussed by the authors.

TL;DR: Results indicate that K2HPO4 serves as a buffering agent as well as a nutrient for the growth of X. campestris.

TL;DR: In this paper, the potential of using tartaric acid modified rice husk (TARH) as a sorbent for the removal of Cu and Pb from semiconductor electroplating wastewater was investigated.

TL;DR: In this paper, the performance of the bioreactors was evaluated by monitoring oxidation reduction potential (ORP), color and chemical oxygen demand (COD) removal, and the results indicated the usefulness of semi-continuous reactors for the degradation of recalcitrant compounds like azo and vat dyes.

TL;DR: It was observed that when the hydrophobicity of the cultures decreased, the attachment capabilities of these microorganisms decreased, which is believed to be due to the production of highly hydrated extracellular polysaccharides when carbon is present in the medium.

TL;DR: In this article, the effect of various conditions such as initial pH, concentration of dye, amount of pellet, temperature, and agitation on Astrazone blue dye decolorization activity of funalia trogii was tested and the longevity of this decoloration activity under optimum conditions was investigated in repeated-batch mode.

TL;DR: In this paper, methanolysis of extracted oils were achieved by Rhizopus oryzae lipase in the presence of high water content, and by a single addition of methanol.

TL;DR: In this paper, an amount of 200 kg fresh salmon frames were enzymic hydrolysed with the commercial protease mixture Protamex™, which is known to produce non-bitter hydrolysates.

TL;DR: Lipase from Aspergillus carneus was purified 24-fold with 38% yield using hydrophobic interaction chromatography and showed high levels of activity in the presence of many organic solvents and Mg ++ , Na + and NH 4 + ions.

TL;DR: Elevated levels of endoglucanase and β-glucosidase activities were produced simultaneously by optimization of growth factors by the thermophilic fungus Thermoascus aurantiacus, and both enzymes exhibited significant thermostability.

TL;DR: In this paper, a solid state fermentation (SSF) method was used to produce citric acid by Aspergillus niger DS 1 using sugarcane bagasse as a carrier and sucrose or molasses based medium as a moistening agent.