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206 articles for “hypothesis”
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Research ArticleOpen accessIn the abstractDoes Trichomes on the Plant Epidermic Surface Disturb Ants Locomotion?Danon Clemes Cardoso, Maykon Passos Cristiano, Lenise Cristina Moraes Vilela, Tiago de Arruda MartinsProblem Statement: Many morphological characteristics, both physical and chemical, are used in the defense against herbivores on plants. Trichomes are structures used by plants as physics defense and when associated with glands combine physics and chemistry defense. Many species of ants are herbivores and use leaves and seeds, others ants use Extra Floral Nectars as a food resource, and the … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 1 · 31 Mar 2009 · 9,350 accessesView PDFCite
Research ArticleOpen accessIn the abstractA New Weighted Rank CorrelationTahani A. Maturi, Ezz H. AbdelfattahProblem Statement: There have been many cases in real life where two independent sources have ranked n objects, with the interest focused on agreement in the top rankings. Spearman's rho and Kendall's tau coefficients assigned equal weights to all rankings. As a result, the literature proposed several weighted correlation coefficients with emphasis on the top rankings, including the top-down, weighted … …Journal of Mathematics and Statistics, Vol. 4, Issue 4 · 31 Dec 2008 · 8,826 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Effect of S-Nitroso-N-Acetylpenicillamine and S-Nitroso-Captopril Co-Administered with Cysteine on Blood Glucose Concentration in an Animal ModelSacha Campbell, Ruby Alexander-Lindo, Tara Dasgupta et al.The study sought to test the hypothesis that co-administration of SNAP and cysteine or CapSNO and cysteine in normoglycaemic rats may further reduce glucose tolerance. An oral glucose tolerance was carried out and the plasma nitrite concentrations were measured and taken as the biochemical markers of in vivo NO formation. The results showed blood glucose levels were significantly elevated at … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 3 · 31 Dec 2008 · 7,221 accessesView PDFCite
Research ArticleOpen accessIn the abstractFostering ICT Development for Growth: Measuring the Payoffs for Australia and the Asean-5 CountriesMudiarasan Kuppusamy, Mosayeb Pahlavani, Ali Salman SalehOver the past few decades the brisk development of information and communication technologies (ICT) has had a phenomenal impact on the economic stability and development of many countries. Empirical studies show that most developed economies have gained significant payoffs (in terms of economic growth) from their ICT investments. This study investigates the hypothesis that ICT-based investment has paid off for … …American Journal of Applied Sciences, Vol. 5, Issue 12 · 31 Dec 2008 · 7,155 accessesView PDFCite
Research ArticleOpen accessIn the abstractEpstein-Barr Virus Infection as A Trigger of Autoimmune Hepatitis: Case ReportD. Cabibi, S. Scaduti, M. Cacciatore, F. Di GaudioThe study underlines the importance of the differential diagnosis between primary Epstein-Barr virus EBV associated hepatitis with features of autoimmunity, in which there is a direct pathogenetic role of the virus, and EBV related autoimmune hepatitis, in which EBV could act as the trigger of the immune-mediated damage with probable differences between the two conditions with regard to the prognosis … …American Journal of Infectious Diseases, Vol. 4, Issue 3 · 30 Sep 2008 · 6,957 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Role of R and D and Business Performance in Korean Electronics CompaniesWoosik Kim, Seok YoonThis study examines the electronics industry in Korea with two points of view; management activity and research and development (R and D) activity for reviewing effectiveness and analyzes effects of R and D activity on business performance. The conclusion of the study shows (1) in terms of DEA measurement in order to compare with efficiency of business performance and R … …American Journal of Applied Sciences, Vol. 5, Issue 7 · 31 Jul 2008 · 6,741 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Multicollinearity on Power Rates of the Ordinary Least Squares EstimatorsO.O. Alabi, Kayode Ayinde, T.O. OlatayoInferences on the parameter estimates of Ordinary Least Square (OLS) estimator in regression model when regressors exhibit multicollinearity is a problem in that large standard errors of the regression coefficients which cause low t-statistic value often result into the acceptance of the null hypothesis. This paper, therefore, makes efforts to investigate the effect of multicollinearity on the power rates of … …Journal of Mathematics and Statistics, Vol. 4, Issue 2 · 30 Jun 2008 · 7,880 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetection of IL-17 and IL-23 in Plasma Samples of Children with AutismAmanda Enstrom, Charity Onore, Irva Hertz-Picciotto et al.Interleukin-23 (IL-23) is a survival factor for a newly described population of T lymphocytes, namely Th-17 cells, that secrete IL-17, tumor necrosis factor- alpha (TNFα) and IL-6. It has been shown that Th-17 cells are a pathogenic T cell subset involved in autoimmune and chronic inflammatory diseases. Based on the increasing evidence of immune dysfunction in autism, including possible autoimmune … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 2 · 30 Jun 2008 · 8,223 accessesView PDFCite
Research ArticleOpen accessIn the abstractRandom Walk Models Classifications: An Empirical Study for Malaysian Stock IndicesChin Wen CheongThis article studied the Random Walk models introduced by Campbell et al.[2] for Malaysian stock market. The analysis is implemented under the possible drastic economics structural change using an iterative structural change test. After the break-date identification, the random walk hypothesis is tested by multiple variance ratios test in two separate periods. We further examined the serial correlations of return’s … …American Journal of Applied Sciences, Vol. 5, Issue 4 · 30 Apr 2008 · 6,850 accessesView PDFCite
Research ArticleOpen accessIn the abstractWhat is Xenohormesis?Joseph A. Baur, David A. SinclairPolyphenols such as resveratrol and quercetin, which are produced by stressed plants, activate sirtuin enzymes and extend the lifespan of fungi and animals, ostensibly by mimicking the beneficial effects of caloric restriction. This observation raises an interesting question: Why should foreign molecules that are non-nutritive and seemingly unrelated to any endogenous molecule modulate the same biochemical pathways that mediate the … …American Journal of Pharmacology and Toxicology, Vol. 3, Issue 1 · 31 Mar 2008 · 10,386 accessesView PDFCite