نتایج جستجو برای: tropical river
تعداد نتایج: 150008 فیلتر نتایج به سال:
The objective of this study is to assess the variation of pollution in the Thai-Laos Mekong associated with seasonal dynamics concomitant with the natural geological features and human activities that impact on the adverse quality of the river. The complex ecology of the 1500 km stretch of the Thai-Laos Mekong River has been studied in this paper to understand the relationship with the geomorph...
Concentrations and speciation of Pb, Cu, Cr, Cd, As, Ni in sediment from New Calabar River, Nigeria were assayed. the trace metals determined using UNICAM solar 969 AAS. Speciation was done five steps sequential extractions. Results revealed that for wet dry seasons, concentrations (mg/kg) ranged 1.1E-2±1.0E-3 As to 5.17±0.04 majority bound residual fraction (F5), while Cu mostly exchangeable (...
This study represents distribution of Arsenic in two different estuaries, one is Himalayan source and another is non-Himalayan source. Arsenic concentration in river water, pore water and ground water was found to be significantly higher in the Mahanadi estuary could be due to fringing mangrove than that of Hooghly-Saptamukhi estuary with thick mangrove ecosystem. Spatial variation of Arsenic i...
In 1987, just before fi rst issue of the Community Eye Health Journal was published, the pharmaceutical Company MSD (known as Merck & Co. Inc. in the USA and Canada) made an unprecedented commitment to donate Mectizan® (ivermectin MSD), for as long as was needed, to control onchocerciasis (river blindness).1 Mass distribution of Mectizan revolutionised the approach to onchocerciasis control at ...
Onchocerciasis a filarial parasitic nematode, also known as river blindness and Robles disease, is a neglected tropical disease infecting more than 18 million people mainly in sub-Saharan of Africa, the Middle East, South and Central America and many other countries. Disease infectivity initiates from Onchocerca volvulus (Filarioidea: Onchocercidae) transmitted by the blackfly, Simulium sp. whi...
BACTERIOPHAGE IN NATURAL WATERS AND IN MAN, IN CALCUTTA DURING THE YEAR 1930. By C. L. PASRICHA, m.a., m.b., B.chir., m.r.c.s., l.r.c.p., CAPTAIN, I.M.S., Military Assistant Surgeon A. J. de MONTE, i.mj)., and S. K. GUPTA, M.B., D.T.M. (From the Bowel Diseases Research Department, Calcutta School of Tropical Medicine and Hygiene.) Samples of waters from the river Hooghly and from certain tanks ...
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