排序方式: 共有7条查询结果,搜索用时 0 毫秒
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WL van Neerven 《Pramana》2000,55(1-2):101-111
We present some techniques which have been developed recently or in the recent past to compute Feynman graphs beyond one-loop
order. These techniques are useful to compute the three-loop splitting functions in QCD and to obtain the complete second
order QED corrections to Bhabha scattering. 相似文献
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Zhang ZH Sun YS Pang H Munyendo WL Lv HX Zhu SL 《Molecules (Basel, Switzerland)》2011,16(12):10347-10356
The purpose of this research was to prepare floating calcium alginate beads of berberine for targeting the gastric mucosa and prolonging their gastric residence time. The floating beads were prepared by suspending octodecanol and berberine in sodium alginate (SA) solution. The suspension was then dripped into a solution of calcium chloride. The hydrophobic and low-density octodecanol enhanced the sustained-release properties and floating ability of the beads. The bead formulation was optimized for different weight ratios of octodecanol and SA and evaluated in terms of diameter, floating ability and drug loading, entrapment and release. In vitro release studies showed that the floating and sustained release time were effectively increased in gastric media by addition of octodecanol. In vivo studies with rats showed that a significant increase in gastric residence time of beads had been achieved. 相似文献
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