HPLC-ELSD测定安神宝颗粒中3种成分

为完善安神宝颗粒的质量控制标准,采用高效液相色谱法同时测定安神宝颗粒中酸枣仁皂A、东莨菪内酯、槲皮素3种有效成分,采用Agilent Zorbox SB C18色谱柱(4.6mm×150mm,5μm)及蒸发光散射检测器,柱温35℃,流动相为甲醇-0.5%的冰醋酸水溶液,梯度洗脱,流速为1.0mL/min,进样量10μL。结果表明,在该色谱条件下,3种有效成分均完全分离,峰面积对数与进样量对数呈良好的线性关系(r=0.995 6~0.998 0);精密度、重复性、稳定性试验结果符合要求,各被测组分的平均回收率在94.74%~96.08%之间。液相色谱法操作简单,准确度、灵敏度高,可用于检测安神宝颗粒中的有效成分,对完善安神宝颗粒质量标准,提升药品的质量控制水平具有实际意义。     

Computationally efficient locality-aware interconnection topology for multi-processor system-on-chip (MP-SoC)

This paper evaluates the Triplet Based Architecture, TriBA – a new idea in chip multiprocessor architectures and a class of Direct Interconnection Network (DIN). TriBA consists of a 2D grid of small, programmable processing units, each physically connected to its three neighbors so that advantageous features of group locality can be fully and efficiently utilized. Any communication model can be well characterized by locality properties and, any topology has its intrinsic, structural, locality characteristics. We propose a new criterion in performance evaluation that is based on the concept of locality in an interconnection network, the “lower layer complete connect”. Our proposed criterion depicts how completely a processing node is connected to all its neighbors. TriBA is compared with 2D Mesh and Binary Tree as static interconnection network. The comparison / evaluation is enumerated from three orthogonal view points, viz., computational speed, physical layout and cost. Our analysis concludes that TriBA is computationally efficient interconnection strategy that exploits group locality in processing nodes.     

Microstructure and properties of nano-TiN modified Ti（C,N）-based cermets fabricated by powder injection molding and die pressing

Powder injection molding （PIM） and die pressing were employed to fabricate nano-TiN modified Ti（C,N）- based cermets. The shrinkage behavior, microstructure, porosity, and mechanical properties of the samples with and without nano-TiN addition fabricated by PIM and die pressing were analyzed. It is demonstrated that for either PIM or die pressing, the porosities are obviously reduced, the mechanical properties are significantly improved after adding nano-TiN, and the hard particles are refined; the rim phase thickness obviously becomes thinner, and the number of dimples in fracture also increases. Compared the samples fabricated by die pressing, it is difficult for PIM to obtain dense Ti（C,N）-based cermets. Due to the too much existence of pores and isolated carbon, the mechanical properties of the sintered samples by PIM are inferior to those of the sintered ones by die pressing.     

Structural and optical properties of Cr doped ZnO crystalline thin films deposited by reactive electron beam evaporation technique

ZnO and Cr-doped ZnO thin films are grown on to glass substrates using reactive electron beam(e-beam) evaporation technique.Variation of structural,morphological,and optical properties with Cr doping is investigated.X-ray diffraction(XRD) studies show that the films are polycrystalline in nature with single phase.Energy dispersive spectroscopy(EDS) results demonstrate that Cr ions are substitutionally incorporated into ZnO.Atomic force microscopy(AFM) reveals that the films present a compact surface and root mean squared(RMS) roughness increased with Cr contents.The optical band gap energy Eg of the films has been determined using Transmission data by spectrophotometer and ellipsometry.The band gap energy found to be decreased with increasing Cr doping concentration.The optical constants(refractive index,extinction coefficient) are calculated using ellipsometry and found to increase with Cr doping concentration.     

城市污水深度处理技术方案比选

简要介绍了城市污水的性质,对城市污水处理厂处理后的污水再次深度处理达到国家《景观娱乐用水水质标准》（GB12941—91）中规定的水体达标排放指标提出两种工艺技术方案,并对两种方案在系统组成、出水水质稳定性、运行费用3个方面进行了比选。     

头孢唑林钠中杂质噻二唑的分离与分析

采用化学法分离得到头孢唑林钠中的杂质噻二唑,用薄层色谱(TLC)和高效液相色谱(HPLC)对分离得到的噻二唑样品初步定性,用红外吸收光谱(IR)对分离得到的噻二唑样品进行结构确认;根据相对保留时间确定其在头孢唑林钠中的残留;依据欧洲药典的方法,用质量分数为1.0 %的头孢唑林钠溶液做对照,以头孢唑林钠供试品溶液中噻二唑的峰面积与质量分数为1.0 %的对照溶液中头孢唑林钠的峰面积比计算噻二唑的含量.结果表明,分离得到的噻二唑是生产工艺过程的残留,所建立的方法适合头孢唑林钠中残留的噻二唑的定性定量分析.进行实际样品分析,其含量在安全限度范围内(质量分数不超过1.0 %),患者可以放心使用.     

Climate change impacts on crop yield,crop water productivity and food security-A review

This paper provides a comprehensive review of literature related to the assessment of climate change impacts on crop productivity using climate,water and crop yield models.The existing studies present that climate change models with higher spatial resolution can be a way forward for future climate projections.Meanwhile,stochastic projections of more than one climate model are necessary for providing insights into model uncertainties as well as to develop risk management strategies.It is projected that water availability will increase in some parts of the world,which will have its own effect on water use efficiency and water allocation.Crop production can increase if irrigated areas are expanded or irrigation is intensified,but these may increase the rate of environmental degradation.Since climate change impacts on soil water balance will lead to changes of soil evaporation and plant transpiration,consequently,the crop growth period may shorten in the future impacting on water productivity.Crop yields affected by climate change are projected to be different in various areas,in some areas crop yields will increase,and for other areas it will decrease depending on the latitude of the area and irrigation application.Existing modelling results show that an increase in precipitation will increase crop yield,and what is more,crop yield is more sensitive to the precipitation than temperature.If water availability is reduced in the future,soils of high water holding capacity will be better to reduce the impact of drought while maintaining crop yield.With the temperature increasing and precipitation fluctuations,water availability and crop production are likely to decrease in the future.If the irrigated areas are expanded,the total crop production will increase;however,food and environmental quality may degrade.     

动物实验管理流程的建立及效果分析

探讨动物实验中心管理的难点,建立适合动物实验的管理流程,并对其效果进行评价和分析。     

一种流媒体代理缓存系统的研究与实现

在参考已有的流媒体代理缓存理论基础上,采用前缀缓存+补丁算法的缓存管理策略,参照流媒体服务器的工作原理,采用RTSP协议作为流传输协议,设计并实现了一种流媒体代理缓存系统.经实验测试该系统提高了系统的字节命中率,进一步减少对网络带宽资源的需求.     

动物实验中猪的手术操作要点

从动物的选择、术前处理、术中配合、术后护理等几方面对医学动物实验中猪的手术操作要点进行总结。