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112 articles for “exposure level”
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Research ArticleOpen accessIn the abstractDetermination of Lead in Human Teeth by Hydride Generation Atomic Absorption SpectrometryHassan T. AbdulsahibProblem statement: The determination of lead in human teeth at concentration levels of μg/ml is proposed using Hydride Generation Atomic Absorption Spectrometry (HG-AAS). To do this, 2% (wv) lanthanum chloride solution was employed as matrix modifying reagent to increase sensitivity and remove matrix interferences. Approach: About 100 μL of sample and 100 μL of 3.0% (m/v) NaBH4 are simultaneously injected … …American Journal of Environmental Sciences, Vol. 7, Issue 5 · 31 Oct 2011 · 7,136 accessesView PDFCite
Research ArticleOpen accessIn the abstractPalmitate-Induced Translocation of Caveolin-3 and Endothelial Nitric Oxide Synthase in CardiomyocytesCatherine J. Knowles, Megan Dionne, Martina Cebova, Ilka M. PinzProblem statement: Palmitate is a known cardiac lipotoxin that blunts cardiomyocyte contractile function and induces apoptosis, likely via accumulation of the lipotoxic ceramide. Ceramide is a sphingolipid and localizes to caveolae, which are lined in the inner membrane leaflet by caveolin proteins. In this study, we investigated the effects of palmitate on caveolin proteins and on endothelial Nitric Oxide Synthase … …OnLine Journal of Biological Sciences, Vol. 11, Issue 2 · 27 Aug 2011 · 7,897 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Prophylactic and Therapeutic Effects of Silymarin on Diazepam-Induced Hepatotoxicity in CatsBahman Mosallanejad, Reza Avizeh, Hossien NajafzadehProblem statement: Diazepam is commonly administered for seizure control and appetite stimulant in cats. Cats may develop acute fatal hepatic necrosis after receiving oral diazepam for several days. The aim of this study was to detect the protective action of silymarin on diazepam-induced hepatotoxicity in cats. Approach: About 25 healthy cats were randomly allotted to five equal groups. Animals in … …American Journal of Applied Sciences, Vol. 8, Issue 9 · 29 Jul 2011 · 7,430 accessesView PDFCite
Research ArticleOpen accessIn the abstractHealth Impacts Estimation of Mineralogical and Chemical Characterization of Suspended Atmospheric Particles over the East DesertU. Ali Rahoma, Elsayed EmaraProblem statement: The small size fraction of aerosols, measured as PM10 and PM2.5, rather than the larger particles, is considered to be responsible for most of the health effects. Such particles have a relatively long residence time in the atmosphere and can therefore travel over long distances. Hence, a large portion of ambient concentrations of PM10 and in particular of … …American Journal of Infectious Diseases, Vol. 6, Issue 3 · 30 Sep 2010 · 10,775 accessesView PDFCite
Research ArticleOpen accessIn the abstractCamel's Milk Protects against Aluminum Chloride-Induced Toxicity in the Liver and Kidney of White Albino RatsFahaid Al-HashemProblem statement: Aluminum chloride (AlCl3) is commonly used in daily life but it can be potentially toxic. Therefore, the present study was carried out to investigate the protective effects of camel’s milk against aluminum-induced biochemical alterations and oxidative stress in the liver and kidney of white albino rats. Approach: White albino male rats (230-250 g) were divided into three groups … …American Journal of Biochemistry and Biotechnology, Vol. 5, Issue 3 · 30 Sep 2009 · 10,376 accessesView PDFCite
Research ArticleOpen accessIn the abstractCross-Latitudinal, Seasonal and Diurnal Comparisons in Thyroid Hormone Concentrations in Sled DogsKriya L. Dunlap, Arleigh J. Reynolds, Kent R. Refsal et al.Problem Statement: Hypothyroidism has been a common disorder in humans and dogs. Amongst a sundry of functions, the thyroid gland plays a key role in metabolism and consequently, hypothyroidism has been a common diagnosis for a decrease in performance in sled dogs. Research has indicated that a variety of environmental factors influence thyroid hormone production, of which, light exposure, climate, … …American Journal of Animal and Veterinary Sciences, Vol. 3, Issue 4 · 31 Dec 2008 · 7,189 accessesView PDFCite
Research ArticleOpen accessIn the abstractCoronary Heart Disease (CHD) Risk Factors and Metabolic Syndrome in HIV-Positive Drug Users in MiamiMarianna K Baum, Carlin Rafie, Shenghan Lai et al.The frequency of coronary heart disease (CHD) is increasing among HIV seropositive persons. This phenomenon may be related to HIV disease itself, the use of antiretroviral medications and increased length of survival, or the synergism of these factors. In this study we have calculated the 10-year CHD risk estimate and the prevalence of metabolic syndrome in a cohort of 118 … …American Journal of Infectious Diseases, Vol. 2, Issue 3 · 30 Sep 2006 · 6,993 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfluence of Different Doses of Irradiation on Oxidant and Antioxidant Systems in the Brain of Guinea PigsYildiz Guney, Ayse Bilgihan, Ayse Hicsonmez et al.The purpose of this study was to establish the impact of oxidative stress in the damaged brain tissue, irradiated with two different dose levels, a single dose of 8 and 15 Gy. In addition, the histological findings caused by ionizing radiation in the early period was investigated. The levels of MDA, GSH, SOD, CAT, GSH-Px and selenium were estimated in … …American Journal of Immunology, Vol. 1, Issue 3 · 30 Sep 2005 · 6,541 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Transcript Labeling Techniques and Development of a Membrane-based Parallel Gene Expression AssayMark A. Fisher, Bonnie B. Plikaytis, Thomas M. ShinnickAn inexpensive alternative to micro arrays was developed to examine the expression of small sets of genes in parallel and used to compare direct and indirect transcript labeling methods. Psoralen-biotin direct labeling was ~10-fold less sensitive than reverse transcriptase-biotin-dUTP labeling, but the enzymatic method generated higher levels of background noise in miniarray hybridizations. The reproducibility of hybridization intensities was the … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 1 · 31 Mar 2005 · 6,875 accessesView PDFCite
Research ArticleOpen accessIn the abstractDecline of Betula ermanii with Special Reference to Ozone Concentration at Mt. Mae-Shirane, Oku-Nikko, JapanY. W. Feng, N. Ohta, H. ShimizuDuring June to October 2000 and 2001 we measured the height, Diameter at Breast Height (DBH) and stand density of Betula ermanii trees at Mt. Mae-Shirane, Japan and the ozone concentration there to explore the relationship between ozone concentration and the decline of B. ermanii trees on the mountain. Height, DBH and stem volume were lower on the southeast-facing slope … …American Journal of Applied Sciences, Vol. 2, Issue 3 · 31 Mar 2005 · 7,059 accessesView PDFCite