Abstract The bioaccumulation factors (BAFs) of heavy metal (Fe, Zn, Pb, Cd, Cr, Cu, Mn, and As) concentrations in benthic pelagic fish organs (muscles, gills, liver, hearts), metals water sediments Ogbese River, Ondo State, Nigeria were investigated. From the results, within permissible limits stipulated by World Health Organization (WHO). However, sediments, Fe, Mn higher than limits, while As...

OBJECTIVE Heart failure in patients and in animal models is associated with action potential prolongation of the ventricular myocytes. Changes in several membrane currents have been already demonstrated to underlie this prolongation. However, information on the two components (I(Kr) and I(Ks)) of the delayed rectifier potassium current (I(K)) in rapid pacing induced heart failure is lacking. ...

Previous studies have suggested an important role for the inward rectifier K+ current (I K1) in stabilizing rotors responsible for ventricular tachycardia (VT) and fibrillation (VF). To test this hypothesis, we used a line of transgenic mice (TG) overexpressing Kir 2.1-green fluorescent protein (GFP) fusion protein in a cardiac-specific manner. Optical mapping of the epicardial surface in ventr...

objective(s):this study aimed to examine the hypothesis that an antiarrhythmic effect might be obtained by ischemic preconditioning of the liver, and also to characterize the potential underlying mechanisms. materials and methods: male wistar rats were anesthetized by thiopental sodium (50 mg/kg, ip) followed by iv injection of heparin (250 iu). remote ischemic preconditioning (ripc) was induce...

OBJECTIVE To document the effect of the liberalisation of the Japanese tobacco market on Japanese smoking rates and on Japanese tobacco industry practices. DATA SOURCE Asahi Shimbun (major daily newspaper) from 1980 to 1996. STUDY SELECTION Review of media coverage on the effects of market liberalisation following the imposition of the USA's section 301 trade sanction. DATA SYNTHESIS The ...

Objective—To document the eVect of the liberalisation of the Japanese tobacco market on Japanese smoking rates and on Japanese tobacco industry practices. Data source—Asahi Shimbun (major daily newspaper) from 1980 to 1996. Study selection—Review of media coverage on the eVects of market liberalisation following the imposition of the USA’s section 301 trade sanction. Data synthesis—The opening ...

Dieldrin accumulation and elimination in muscle tissue of channel catfish (Ictalurus punctatus) from water and food was determined in the laboratory. Twenty-eight-day exposure of fish 150-225 mm and 350-400 mm long to 75 parts per trillion (ng/liter) dieldrin resulted in the larger catfish consistently accumulating more dieldrin than the smaller fish. After 28 days of elimination, dieldrin leve...

The Drosophila melanogaster dorsal vessel, or heart, is a tubular structure comprised of a single layer of contractile cardiomyocytes, pericardial cells that align along each side of the heart wall, supportive alary muscles and, in adults, a layer of ventral longitudinal muscle cells. The contractile fibers house conserved constituents of the muscle cytoarchitecture including densely packed bun...