排序方式: 共有76条查询结果,搜索用时 0 毫秒
31.
KOKOT Serge 《中国科学B辑(英文版)》2011,(5)
This paper describes a kinetic spectrophotometric method for simultaneous determination of three cephalosporin antibiotics,cephradine,cefaclor and cefixime,with the aid of chemometrics. The method relies on their oxidation with KMnO4 to produce green manganate with different kinetic rates in alkaline medium. The proposed method was successfully applied to a pharmacokinetic study of three cephalosporin antibiotics in rabbit plasma via intravenous injections. The results indicated that the amount of cephradin... 相似文献
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与Λ型三能级原子非共振相互作用的SU(1,1)场的性质 总被引:1,自引:1,他引:0
导出了介质中双模SU(1,1)相干态场与Λ型三能级原子非共振相互作用系统的态函数,研究了场模失谐量、克尔介质以及原子初态对场的互关联函数和Mandel Q参量的影响.结果表明:失谐量将削弱光场两模的关联性,并影响场模光子数的统计分布;当SU(1,1)场两模间的光子数之差增大时,失谐量对它们产生的影响变得更弱,此时克尔效应的影响变得明显,它使两模的关联性和光子数的统计分布趋于稳定. 相似文献
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Halburd和Korhonen指出研究复域差分的值分布问题对进一步研究复域差分与差分方程具有十分重要的意义.本文得到了关于有限级亚纯函数的差分多项式的亏量为一些结果,其中部分结果可视为微分多项式相应结果的差分模拟.同时,我们在一定条件下给出了经典的Valiron-Mohon'ko定理的一个差分模拟结果,并且作为本文中的一个重要工具出现.这些结果推广了前人已有结果. 相似文献
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兔防御素NP1在大肠杆菌中的表达 总被引:2,自引:0,他引:2
通过选用大肠杆菌偏好密码子对兔防御素基因进行改造,人工合成兔防御素基因并构建编码GST—NP1融合基因,从而在大肠杆菌中进行表达。研究表明:表达的蛋白质经过亲和层析洗脱纯化,SDS—PAGE电泳分析,在目的分子量处出现预期条带。灰度扫描分析表明,表达量最高可达细菌总蛋白的34.7%。经切割、复性后的防御素具有溶血活性。 相似文献
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Roger Ruan 《高等学校化学研究》2009,25(3)
The authors dealt with the effects of dynamic high pressure micro-fluidization(untreated and 20―160 MPa treated) on the structure and physico-chemical properties of egg white solutions[6%(mass fraction) or 61.2 mg protein/mL]. Micro-fluidization treatment resulted in a decrease in mean particle size,and little change in solubility. It was found that the residual denaturation enthalpy was decreased with the increase of pressure from 20 to 100 MPa and from 120 to 160 MPa,reaching into the maximum at 160 MPa. ... 相似文献
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啁啾叠栅光纤光栅反射特性和时延特性的研究 总被引:1,自引:0,他引:1
从耦合模理论出发,用矩阵分析法分析由两线性啁啾光纤光栅构成的啁啾叠栅光栅的反射特性和时延特性,分别得到光栅长度、啁啾系数和折射率变化峰值对反射谱及光栅时延的影响. 相似文献
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MeiHuaYANG RongBinZHANG FengYiLI 《中国化学快报》2004,15(10):1230-1232
The NiB amorphous alloy catalysts supported on CNTs and alumina were prepared by impregnation and chemical reduction. The gas-phase benzene hydrogenation was used as a probe reaction to evaluate the catalytic activity. The result showed that the NiB amorphous alloy catalyst supported on carbon nanotubes exhibited higher activity than that supported on alumina. 相似文献
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A new bidesmoside triterpenoid saponin,named stauntoside C1(1) has been isolated from Stauntonia chinensis.Its structure was established by means of spectral and chemical methods. 相似文献
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