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Ni Bangfa Tian Weizhi Nie Huining Wang Pingsheng He Gaokui 《Biological trace element research》1999,(1):267-272
Three kinds of plant leaves, Chinese white aspen, arborvitae, and pine needles, have been sampled from the Yanshan Oil refinery
complex, the Capital Iron and Steel Factory, and Badachu, a control area in Beijing, as biomonitors for air-pollution studies.
Each sample was divided into two parts, washed, and unwashed. Thirty-one trace elements (As, Au, Br, Ca, Cd, K, La, Lu, Mo,
Na, Sb, Sm, U, W, Yb, Ba, Ce, Co, Cr, Cs, Eu, Fe, Hf, Hg, Rb, Sc, Se, Sr, Ta, Tb, Th, and Zn) have been determined by using
the relative and the K0 methods of instrumental neutron activation analysis (NAA) techniques. The results indicated the following: (1) The concentration
of trace elements in unwashed samples are much higher than these in washed samples; (2) the area around Capital Iron and Steel
Factory is heavily polluted, and the Yanshan Oil refinery complex area is moderately polluted; (3) Chinese white aspen is
a good biomonitor in particular seasons and pine needles are better than arborvitae for yearly monitoring; (4) elements As,
Cd, Hg, Co, Rb, Sb, W, and Zn are highly absorbed by Chinese white aspen. Pine needles are sensitive for the absorption the
elements Br, Cr, Cd, Fe, Sc, Cs and rare earth elements, but arborvitae is very sensitive for the absorption of Sr. 相似文献
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Nie Huiling Qin Linlin Tian Weizhi Ni Bangfa Bao Ande Wang Pingsheng 《Biological trace element research》1999,(1):623-628
Thirty rats were divided randomly into five groups and fed with different feeds. They were killed after 2 mo. Right thighs
of these rats were taken as samples. Bone mineral densities of these samples were measured by the double-energy x-ray bone
mineral densitometer, and trace elements contents of the samples were analyzed by neutron activation analysis. Results of
the experiments showed that some elements were well correlated with others, and there were obvious variances between some
elements of the normal group and those of other four groups. 相似文献
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