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JPC – Journal of Planar Chromatography – Modern TLC - In this work we have studied the separation of a mixture of the sulfonylurea herbicides (metsulfuron-methyl, chlorsulfuron,... 相似文献
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Yao Liu Xurui Xiao Yiping Zeng Chunhui Yan Haiqun Zheng Dianzhao Sun 《中国科学A辑(英文版)》1997,40(5):540-545
The photoelectric properties of the lattice-matched GaAs/A1
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Gal -
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As quantum well electrodes and the influence of the electrode structure such as well width, the thickness of outer barrier
and the number of period were studied in a nonaqueous electrolyte. A new kind of structure of multiple quantum well electrode
with varied well width, possessing the quantum yield three times that of GaAs bulk materials, was designed and fabricated.
Project supported by the National Natural Science Foundation of China. 相似文献
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JPC – Journal of Planar Chromatography – Modern TLC - A high-performance thin-layer chromatographic (HPTLC) method for simultaneous analysis of temephos and fenitrothion in green tea... 相似文献
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针对双参数对数正态分布场合下的多个异常数据给出一种新的检测方法。首先由参数的BLUE导出证明了两个检验所用的枢轴量,然后通过蒙特卡罗方法模拟得到枢轴量的样本分位点表,最后用一个例子说明方法是有效可行的。 相似文献
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The template 2‐deoxy‐1‐thio‐α‐hexopyranosid‐3‐ulose was synthesized in quantitative yield and high diastereoselectivity by 1,4‐addition of aryl and alkyl thiols to hex‐1‐en‐3‐ulose promoted by cesium carbonate in THF. 相似文献
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A gas chromatography method for the determination of residues of 6 pesticides in Isatis indigotica Fort and Paeonia lactiflora Pall is described. Optimizations of different parameters were performed. The method used 0.5 g herb sample, silica gel as the matrix solid-phase dispersion sorbent, and acetone as the eluting solvent. Recoveries at spiked concentrations between 0.1 and 5 mg/kg were between 80.63 and 110.12%, with relative standard deviations ranging from 0.43 to 17.67%. The limits of quantitation were 0.01 mg/kg for metalaxyl, triadimefon, and paclobutrazol and 0.05 mg/kg for vinclozolin, tebuconazole, and fenarimol. The method may be useful as a screening protocol for the determination of these pesticides in medicinal herb samples. 相似文献
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