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37 articles for “selectivity”
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Research ArticleOpen accessIn the abstractSerpentine Soils, Adverse Habitat for PlantsMahsa Tashakor, Wan Zuhairi Wan Yaacob, Hamzah MohamadThe unpleasant effect of serpentine soil on plant life has been a topic of many studies for several decades. Infertility and flora selectivity nature of serpentine soils are the features, which made them of interest throughout the world. This research includes a geochemical study on two Malaysian serpentine massifs to introduce their harmful factors concerning vegetation. X-ray fluorescence results on … …American Journal of Environmental Sciences, Vol. 9, Issue 1 · 26 Feb 2013 · 7,756 accessesView PDFCite
Research ArticleOpen accessIn the abstractPurification of Natural Gas with Impurities using Membrane Processes: Parameter EstimationN. W. Jusoh, K. K. Lau, A. M. ShariffProblem statement: Membrane processes have received a significantly high attention on natural gas separation processes since this technology provides higher operating and cost advantages as compared to other technologies. One of the major problems related to natural gas separation using membrane is the existence of feed impurities including CO2, heavy hydrocarbon and water. Approach: Hence, mathematical model that is able … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 1 · 22 May 2012 · 8,426 accessesView PDFCite
Research ArticleOpen accessIn the abstractElectroanalytical Determination of Doripenem using a Screen-Printed ElectrodeNora H. Al-ShaalanProblem statement: The performance characteristics of Sensitive Screen-Printed (SPE) and Carbon Paste (CPE) electrodes were investigated for the Determination of Doripenem (DP) in pure, pharmaceutical preparations and biological fluids. Approach: The proposed electrodes is characterized in terms of plasticizer type, response time, pH and temperature. Results: The two electrodes showed nearly Nernstian behaviours over the concentration range of 2×10−4-5×10−2 mol/l … …American Journal of Pharmacology and Toxicology, Vol. 7, Issue 1 · 21 Feb 2012 · 7,659 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Review of Acetol: Application and ProductionMohd Hanif Mohamad, Roila Awang, Wan Md Zin Wan YunusProblem statement: Acetol is used as organic intermediates because it contains both hydroxyl and carbonyl functional groups and mainly use to produce polyols and acrolein. It also widely uses as reduced dyes and skin tanning agent. The commercially used acetol is made from petroleum-based that leads to high cost of production. Approach: This review highlighted applications of acetol and established … …American Journal of Applied Sciences, Vol. 8, Issue 11 · 5 Oct 2011 · 11,827 accessesView PDFCite
Research ArticleOpen accessIn the abstractHeat-Modeling of Microwave Assisted Epoxidation of Palm Acid OilN. Saifuddin, L. Wei Zhan, K. Xin NingProblem statement: While microwave chemistry could well be the most convenient, rapid and energy-saving way to initiate a chemical reaction, the issues of thermal versus microwave specific effect remain unaddressed. Approach: A three-dimensional Finite Element Model (FEM) was developed to predict temperature profile during the enzymatic epoxidation of palm acid oil using microwave heating. Three-dimensional partial differential equations are formulated … …American Journal of Applied Sciences, Vol. 8, Issue 3 · 25 Mar 2011 · 7,676 accessesView PDFCite
Research ArticleOpen accessIn the abstractPlastic Membrane Electrodes of Coated Wire Type for Micro Determination of Quininium Cation in Pharmaceutical TabletsLaila Abdullah Al Shatti, Hayat Mohammed Marafie, Adel Fahmi ShoukryProblem statement: Silver and copper all-solid state wire sensor electrodes of quininium cation with different ion exchangers have been prepared and used in pharmaceutical analysis. A comparative study with a reference method is applied in order to investigate the validity of the proposed method for potentiometric analysis of pharmaceutical compounds containing quinine. Approach: A Nernstian equation was proved for all … …American Journal of Applied Sciences, Vol. 8, Issue 2 · 28 Feb 2011 · 7,690 accessesView PDFCite
Research ArticleOpen accessIn the abstractDoes Predator Go for Size Selection or Preferential Toxic-Nontoxic Species Under Limited Resource?Joydeep Pal, S. Bhattacharya, J. ChattopadhyayProblem statement: Selectivity is common in predator-prey interaction but the selection mechanism is still unexplored and a debatable issue in modern theoretical and experimental ecology for numerous species across the globe. In present investigation we emphasized the hypothesis that the zooplankton is less inclined to opt the food based on size selectivity criteria than the preferential selectivity for the safe … …OnLine Journal of Biological Sciences, Vol. 10, Issue 1 · 30 Jun 2010 · 7,903 accessesView PDFCite
Research ArticleOpen accessIn the abstractFormulation and Evaluation of a Selective Medium for Lactic Acid Bacteria-Validation on Some Dairy ProductsBaida Djeghri-Hocine, Messaouda Boukhemis, Abdeltif AmraneProblem statement: Lactic Acid Bacteria (LAB) is characterized by fastidious nutritional requirements leading to the need for complex and rich media to allow growth. Owing to their complex requirements which also varied significantly with species, the formulation of selective media for LAB is difficult. Approach: A culture medium for LAB was previously developed based on deproteinated whey supplemented with yeast … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 9,410 accessesView PDFCite
Research ArticleOpen accessIn the abstractDesign and Evaluation of Three Pair Primers for Exon 1 Amplification of Hyaluroglucosaminidase-1 GeneUsman Sumo Friend Tambunan, Sylvia Sugito, Arli Aditya ParikesitProblem statement: Hyaluronidase is an enzyme which catalyze hydrolysis of Hyaluronan (HA). Hyaluronan is important in cell migration during embryonic development, cellular proliferation and differentiation and has a structural role in connective tissues. Hyaluronidase deficiency is correlated with mucopolysaccharidosis IX. In human, hyaluronidase is encoded by HYAL1 gene. The mutation study of HYAL1 gene was carried out by many researchers, … …OnLine Journal of Biological Sciences, Vol. 10, Issue 2 · 16 Jun 2010 · 8,702 accessesView PDFCite
Research ArticleOpen accessIn the abstractPRESY: A Context Based Query Reformulation Tool for Information Retrieval on the WebAbdelkrim Bouramoul, Mohamed-Khireddine Kholladi, Bich-Lien DoanProblem statement: The huge number of information on the web as well as the growth of new inexperienced users creates new challenges for information retrieval. It has become increasingly difficult for these users to find relevant documents that satisfy their individual needs. Certainly the current search engines (such as Google, Bing and Yahoo) offer an efficient way to browse the … …Journal of Computer Science, Vol. 6, Issue 4 · 30 Apr 2010 · 7,666 accessesView PDFCite