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Four typical functional zones ,i.e. traffic zone, commercial zone, industry zone and residential zone were selected in Nanjing city for street dust sampling .In each zone and site, dust samples were randomly collected for five times. The total heavy metals were determined by atomic absorption spectrometry. And the concentration enrichment ratio (CER) was used to assess the degree of heavy metal contamination...
Contents of colloidal trace metals(1kD~1μm) in Meiliang Bay, an algal-bloom bay of Taihu Lake, and Gonghu Bay, a macrophytes dominanted bay of Taihu Lake, were investigated in April by using cross-flow ultrafiltration (CFF) technique. In each sampling site, 20 L surface water was pumped and filtrated by 63 μm nylon sieve. The filtered water was carried to laboratory in 2 hours, prefiltrated by 1μm...
Agile practices have grappled their importance for development of softwares in industries. Agile methods demand active communication with customers and team members to achieve the highest customer satisfaction. Effective communication is the need for building trust and discipline among the team members and customers. It has been observed in literature that active communication in communication hierarchy...
Current method of BGA sample preparation repackaging process for backside emission analysis is by applying direct bonding from the exposed gold wire on the bottom of the package to the lead frame of the secondary open top package. The exposed gold wire on the package bottom is achieved through the back grinding process. The very small diameter of the exposed gold wire on the backside of the BGA which...
The adsorption of copper and lead on MnO2 was followed by monitoring the frequency of piezoelectric crystal coated with MnO2 in contact with solutions of the metal under study, at controlled temperature. Each isotherm was constructed for concentrations of each metal between 1 and 58 mg L-1. When absorption data for copper or lead were fitted to the Langmuir isotherm, two linear zones were obtained,...
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