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对环境监测布点采样中的QC/QA以及由采样引起的误差来源做了简要分析,并对监测采样过程中QC/QA的操作提出了一些设想。 相似文献
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DM Peter Lorenz Rainer Bollmann Georg Klaus Hinkel Marco Mächler Gabriele Siegert Gudrun Stamminger Jörg Wendisch Sabine Ziemer 《黑龙江环境通报》1991,11(11):819-825
The study of the fetal platelet count and size can, according to the literature, be used for the prenatal diagnosis of the Wiskott-Aldrich syndrome (WAS). So far, no affected fetuses have been identified by this method. All pregnancies in which this method had been applied to resulted, as correctly predicted, in the birth of normal children. Here we report on a familial case of WAS where the haematological parameters failed to reveal the affected second child. Hence we assume that the platelet count and size of platelets remain normal in fetuses with WAS to the gestational age of 22 weeks and cannot be used for prenatal diagnosis. 相似文献
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Plotkin M Hod I Zaban A Boden SA Bagnall DM Galushko D Bergman DJ 《Die Naturwissenschaften》2010,97(12):1067-1076
The Oriental hornet worker correlates its digging activity with solar insolation. Solar radiation passes through the epicuticle,
which exhibits a grating-like structure, and continues to pass through layers of the exo-endocuticle until it is absorbed by the pigment melanin in the brown-colored cuticle or xanthopterin in the yellow-colored
cuticle. The correlation between digging activity and the ability of the cuticle to absorb part of the solar radiation implies
that the Oriental hornet may harvest parts of the solar radiation. In this study, we explore this intriguing possibility by
analyzing the biophysical properties of the cuticle. We use rigorous coupled wave analysis simulations to show that the cuticle
surfaces are structured to reduced reflectance and act as diffraction gratings to trap light and increase the amount absorbed
in the cuticle. A dye-sensitized solar cell (DSSC) was constructed in order to show the ability of xanthopterin to serve as
a light-harvesting molecule. 相似文献
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