108 results for “Enzymatic”

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Research ArticleOpen accessIn the abstractDynamic Mathematical Modelling of Reaction Kinetics for Cyclodextrins Production from Different Starch Sources Using Bacillus macerans Cyclodextrin GlucanotransferaseSyahinaz Shahrazi, Suryani Saallah, Mohd Noriznan Mokhtar et al.This study relates to the mathematical modelling of enzymatic production of Cyclodextrins (CDs) by Cyclodextrin Glucanotransferase (CGTase) from Bacillus macerans. The experiments were carried out in batch mode using different starch sources and the results were used to estimate unknown parameters using linearization and dynamic simulation methods. α- and β-CD produced from tapioca were found to give the highest Michaelis-Menten … …American Journal of Biochemistry and Biotechnology, Vol. 9, Issue 2 · 20 Jun 2013 · 7,912 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSecondary Metabolite Changes in Pecan (Carya illinoensis) Tissue Damaged by Euplatypus segnis Chapuis and Associated FungiRamon Alvidrez-Villarreal, Francisco Daniel Hernandez-Castillo, Oswaldo Garcia-Martinez et al.Problem statement: The borer insect Euplatypus segnis Chapuis is associated to Fusarium solani, Fusarium oxysporum, Alternariaalternata and Botryodiplodia theobromae fungi which produce regressive death in pecan (Carya illinoensis) trees. In the Mexico northern have been reported loses estimatesof more than 20% in production by the combination of insects and phyto-pathogen organisms. It also has been observed that some trees can … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 4 · 31 Dec 2011 · 8,179 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Effect of Heat or Heat-Xylose Processing on Nitrogen Fractions and in Situ/In Vitro Ruminal and Post-Ruminal Protein Disappearance of Guar MealHossein Jahani-Azizabadi, Mohsen Danesh Mesgaran, Ali Reza Vakili et al.Problem statement: Guar meal is a by-product consisting of hull and germ and is mostly used as a protein source in poultry and ruminant rations. The aim was to determine the effect of heat or heat-xylose processing on nitrogen fractions, in situ ruminal degradation parameters and in situ/in vitro ruminal and post-ruminal disappearance of guar meal. Approach: Samples were intact … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 4 · 27 Dec 2010 · 8,158 accessesView PDF Cite

Research ArticleOpen accessIn the abstractGlomalin Production and Microbial Activity in Soils Impacted by Gypsum Mining in a Brazilian Semiarid AreaAdalia Cavalcanti do Espírito Santo Mergulhao, Helio Almeida Burity, Fabio Sérgio Barbosa da Silva et al.Problem statement: Mining activities involve the removal of the vegetal cover and the soil organic layer, causing a severe environmental impact. In Northeast Brazil, 40% of the world’s crude gypsum is found in a semiarid area, making this region responsible for 95% of the gypsum demand in the national market. Although economically important, this activity is harmful to the environment. … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 4 · 11 Nov 2010 · 9,028 accessesView PDF Cite

Research ArticleOpen accessIn the abstractNovel Postharvest Treatment Reduces Ascorbic Acid Losses in Mango (Mangifera indica L.) Var. KentMaria A. Islas-Osuna, Norma A. Stephens-Camacho, Carmen A. Contreras-Vergara et al.Problem statement: Mango is a tropical fruit that ripens very quickly; for this reason, there has been a continuous effort to develop postharvest technologies to extend its shelf life and quality. Among them, 1-Methylcyclopropene (1-MCP) is widely used because it inhibits the action of ethylene receptors. Approach: Changes in physicochemical parameters, bioactive compounds and cell wall degrading activities were evaluated … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 3 · 30 Sep 2010 · 9,130 accessesView PDF Cite

Research ArticleOpen accessIn the abstractTotal Level of Serum Homocysteine in Males and Females with Coronary Heart Disease of Different Age GroupsFaisal I. Mohammad, Sally Awawdeh, Akram Saleh, Nabil A. BashirProblem statement: Elevated plasma total homocysteine concentration is a risk factor of cardiovascular disease. Total homocysteine level is a strong predictor of mortality in-patient with an angiographically confirmed Coronary Heart Disease (CHD), so we want to know at what age in males and females elevated homocysteine will be significantly elevated and this will help for better management and prognosis by … …American Journal of Biochemistry and Biotechnology, Vol. 6, Issue 2 · 30 Jun 2010 · 7,542 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Health Risk of Formaldehyde to Human BeingsS. Norliana, A. S. Abdulamir, F. Abu Bakar, A. B. SallehProblem statement: Formaldehyde was classified as a potential human carcinogen, identified by the US Environmental Protection Agency and International Agency for Research on Cancer as a Class 2A carcinogen. It also can cause irritation to human. However, formaldehyde present in biological fluids or tissues and environment as a result of natural processes or from man-made sources and can be emitted … …American Journal of Pharmacology and Toxicology, Vol. 4, Issue 3 · 30 Sep 2009 · 15,280 accessesView PDF Cite

Research ArticleOpen accessIn the abstractEffect of Intravenous Ketamine Administration on Blood Glucose Levels in Conscious RabbitsSuleiman I. Sharif, Hanan A. AbouazraProblem statement: The intravenous general anaesthetic ketamine has been shown to produce changes in blood glucose levels. It is important to study the pharmacological basis of such an effect. Approach: The influence of varying doses of ketamine administered intravenously was studied in conscious rabbits. Serum glucose was determined by blood glucose method using an enzymatic PAP250 kit. Results: Low doses … …American Journal of Pharmacology and Toxicology, Vol. 4, Issue 2 · 30 Jun 2009 · 9,950 accessesView PDF Cite

Research ArticleOpen accessIn the abstractProtective Effects of Covalent Cross-Linking on Proteolysis of Human Coproporphyrinogen Oxidase and Implications for PorphyriaAhmed W. Jafri, Jason R. Stephenson, Justin B. Morgenthaler et al.The effects of covalent cross-linkers on the enzyme, coproporphyrinogen oxidase, had been previously studied but their role in protecting the enzyme from protease cleavage has not been evaluated. Therefore, we examined how the cross-linker bis (sulfosuccinimidyl) suberate (BS3) affects the ability of trypsin to digest purified, wild type recombinant human coproporphyrinogen oxidase and selected mutants. Following incubation, the apparent molecular … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 4 · 31 Dec 2008 · 6,690 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Novel Rodent Model of Autism: Intraventricular Infusions of Propionic Acid Increase Locomotor Activity and Induce Neuroinflammation and Oxidative Stress in Discrete Regions of Adult Rat BrainDerrick F. MacFabe, Karina Rodríguez-Capote, Jennifer E. Hoffman et al.Innate neuroinflammatory changes, increased oxidative stress and disorders of glutathione metabolism may be involved in the pathophysiology of autism spectrum disorders (ASD). Propionic acid (PPA) is a dietary and gut bacterial short chain fatty acid which can produce brain and behavioral changes reminiscent of ASD following intraventricular infusion in rats. Adult Long-Evans rats were given intraventricular infusions of either PPA … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 2 · 30 Jun 2008 · 12,618 accessesView PDF Cite