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257 results for “activity concentration”
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Research ArticleOpen accessIn the abstractMonstrous Hazards Produced by High Radioactivity Levels Around Assiut Thermal Power PlantHany El-Gamal, Mohamed El-Azab Farid, Abdulla Ibrahim Abdel Mageed et al.The natural radioactivity level of heavy oil, ash and soil samples around Assiut Thermal Power Plant (ATPP) in Egypt was determined using gamma ray spectrometry. The average concentrations of 226Ra, 232Th and 40K in fly ash were found to be 2307±143, 1281±80 and 1218±129 Bq kg-1, respectively, while the corresponding values in soil samples were 2670±107, 1401±78 and 1495±100 Bq … …American Journal of Environmental Sciences, Vol. 9, Issue 5 · 17 Sep 2013 · 6,967 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntimicrobial Properties of Newly Synthesized Derivatives of CoumarineS. Govori, S. Spahiu, V. Kalaj et al.Problem statement: Coumarins are well known for their biological activity. On the basis of that we have synthesized some new derivatives of coumarine and investigated their antimicrobial properties. Approach: 4-Heteroaryl-coumarin-3-carbaldehydes 4(a-d) are synthesized by condensation of 4-chloro-coumarin-3-carbaldehydes 2 and corresponding heterorylamines 3(a-d) under reflux reaction conditions. Antimicrobial properties of new coumarins 4(a-d) are investigated and results are submitted for their … …American Journal of Biochemistry and Biotechnology, Vol. 6, Issue 4 · 31 Dec 2010 · 9,673 accessesView PDFCite
Research ArticleOpen accessIn the abstractExtraction and Purification of Collagenase Enzymes: A Critical ReviewSaid M Daboor, Suzanne M Budge, Abdel E Ghaly et al.Problem statement: Enzymes have vital roles in several industrial processes (foods, cosmetics, nutraceuticals and pharmaceuticals) due to their highly selective nature and high activity at very low concentrations. Recent efforts to identify new sources of useful enzymes have been concentrated on the marine environment because of the potential to make use of processing wastes. About 35-50% of the mass of … …American Journal of Biochemistry and Biotechnology, Vol. 6, Issue 4 · 31 Dec 2010 · 14,311 accessesView PDFCite
Research ArticleOpen accessIn the abstractImmune Response and Pasteurella Resistance in Rabbits Fed Diets Containing Various Amounts of Black Cumin SeedsNabiela M. El Bagir, Imtitha T.O. Farah, Safia M.B. Elhag et al.Problem statement: The consumption of black cumin (Nigella sativa) seed has immunomodulatory and anti-bacterial activity, but in rabbits this had not yet been tested. Approach: In the present studies, rabbits were fed diets without or with black cumin seed and antibody production, phagocytotic activity, hypersensitivity and resistance against Pasteurellosis were assessed. Results: Feeding black cumin seed significantly increased serum concentrations … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 7,523 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntitumor and Quantitative Structure Activity Relationship Study for Dihydropyridones Derived from CurcuminBahjat A. Saeed, Kawkab Y. Saour, Rita S. Elias et al.Problem statement: Pyridones are known to have variety of biological activities like antitumor, antibacterial, antiinflamatory and antimalarial activities. This study presented antitumor evaluation of dihydropyridones derived from curcumin, as well as curcumin for comparison. Approach: The compounds evaluated for a preliminary estimation of the in vitro tumor inhibiting activity against 11 of tumor cell lines by using Microculture Tetrazolium assay … …American Journal of Immunology, Vol. 6, Issue 1 · 31 Mar 2010 · 8,262 accessesView PDFCite
Research ArticleOpen accessIn the abstractSalicylic Acid Protects Nitrate Reductase Activity, Growth and Proline in Amaranth and Tomato Plants during Water DeficitC. E. Umebese, T. O. Olatimilehin, T. A. OgunsusiProblem statement: Seedlings of Amaranthus hybridus cv. NHAC-3 (large green, amaranth) and Lycopersicum esculentum cv. Roma (tomato) were subjected to 7 days water stress at Early Vegetative (EV), Late Vegetative (LV), Early Flowering (EF) and Late Flowering (LF) stages of growth to study the impact on leaf water potential (ψw), Nitrate Reductase Activity (NRA), growth (plant height, shoot and root … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 3 · 30 Sep 2009 · 9,565 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of the Immunomodulatory Properties of a Calf Lipid Thymus Extract and Standardization of a Method for Quantification of its Biological ActivityMiodrag Colic, Radmila Popovic, Dusanka Mrdakovic et al.The aim of this study was to test the immunobiological properties of a new formulation of the lipid thymus calf extract (Thymsol), prepared for in vitro cell culture experiments. At first, we showed that Thymsol enhanced the antigen specific immune response in AO rats in vitro, using Keyhole limpet hemocyanin (KLH). At lower concentrations (0.5-2.5 μg mL-1) the extract increased … …American Journal of Immunology, Vol. 3, Issue 2 · 31 Dec 2007 · 7,039 accessesView PDFCite
Research ArticleOpen accessIn the abstractHIV-1-Specific CTL Recognizing a Scarce Epitope Are Not Suppressed by HIV-1 Protease InhibitorsOtto O. YangHIV-1-protease inhibitors have received growing attention as agents that can affect proteases in human proteasomes, with potentially deleterious effects for HIV-1-specific cellular immunity. Studying the antiviral activity of HIV-1-specific CTL that recognize an epitope that is presented at limiting concentrations on infected cells, we find that several HIV-1 protease inhibitors do not affect their function. These data indicate that these … …American Journal of Immunology, Vol. 3, Issue 1 · 30 Jun 2007 · 7,016 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Rumen Culture Adaptation to Origanum vulgare L. Essential Oil on Rumen Methane and FermentationMohamed G. Embaby, Mevlüt Günal, Amer AbuGhazalehThe main objective of this study was to investigate the impact of adding oregano essential oil (OEO) to adapted and unadapted rumen cultures on methane gas (CH4) production and rumen fermentation under in vitro condition. Rumen fluid for culture fermenters was collected from a Holstein cow located in Southern Illinois University farms. The adapted and unadapted rumen cultures were obtained … …American Journal of Animal and Veterinary Sciences, Vol. 14, Issue 3 · 2 Sep 2019 · 7,599 accessesView PDFCite
Research ArticleOpen accessIn the abstractSpeech to Text in Indonesian Personal AssistantIntan Sari Areni, Ayu Dhiya Mufidah, Indrabayu et al.Short Message Service (SMS) is one of the most often used features on smartphones. Delivery of SMS messages while driving can interrupt driver’s concentrations that may lead to an accident. Hence, Speech Recognition system in SMS message activity is required. In this research, the Speech Recognition system is able to convert speech as an Indonesian query in making messages, entering … …Journal of Computer Science, Vol. 15, Issue 6 · 19 Jun 2019 · 8,378 accessesView PDFCite