نتایج جستجو برای: artisanal small
تعداد نتایج: 788712 فیلتر نتایج به سال:
The radioactivity associated with artisanal and small-scale gold mining activities (ASM) carried out along the Ulindi River, in eastern Democratic Republic of Congo, was evaluated by gamma-ray spectrometry inductively coupled plasma–mass soil sediment samples. results revealed that activity concentrations 238U (up to 3127 ± 98 Bq kg?1), 226Ra 2710 89 kg?1) 232Th 2142 162 were 71- 89-fold higher...
Given limited funds for research and widespread degradation of ecosystems, environmental scientists should geographically target their studies where they will be most effective. However, in academic areas such as conservation and natural resource management there is often a mismatch between the geographic foci of research effort/funding and research needs. The former frequently being focused in...
Mining activities have resulted in a large volume of tailings containing certain proportion lost minerals, making them potential reprocessing opportunity, and information on mineral is often scarce. In this study, conceptual framework was established used to produce meaningful knowledge from the Nyamatete mine at HABATU Company Limited (an ASM Rwanda). Tailings particles were investigated based...
Hooghly–Matlah estuarine system in the state of West Bengal in India sustains world’s important multi-species commercial fisheries. Winter migratory bag net is one of the most important artisanal fishing gears used for exploitation of the resources in stretches of the estuary. A study was carried out during 2010–11 to find out the current catching efficiency of this artisanal net. A total of tw...
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