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particles Separation using Micromachined Ultrasonic Device

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Particles Separation using Micromachined Ultrasonic Device

五桠果提取物对糖尿病大鼠的降血糖及降血脂作用(英文)

第二届全国压电和声波理论及器件技术研讨会

作者： Hui Yang,Hongming Sun,Yi Zhang,Hang Guo (pen-Tung sah MEMS Research Center,Xiamen University,p.R.China)

In our During the past 10 years,there is a fast growing demand to develop micro-instruments or Lab-on-Chips that can fast identify,test,and analyze bio-molecules,cells,and other *** the first step for identification and test,particles should be *** present,two types of methods, contact and non-contact methods,can be used for particles *** they can operate continuously and preserve the particles of interest in suspension for subsequent use without fouling the separation equipment,non-contact methods are more suitable for particle *** with other non-contact methods,such as electrophoretic or magnetic method,ultrasonic method only requires that density or compressibility of the particles is different from that of the medium surrounding the particles,it is therefore ultrasonic separation technique can also be used to separate those which are not charged particles or nonmagnetic ***,many research groups are studying using ultrasonic technique,combined with MEMS(MicroElectromechanical Systems) technology,to separate or manipulate the *** this paper,we propose and investigate a new ultrasonic microdevice to separate *** first start from the fundamental of ultrasonics to obtain the radiation force on microparticles for *** force on a compressible particle in a standing wave field can be derived as proportional to the radius of the particle,wave number,ultrasound energy density,and density-compressibility constant F(λ,σ).It is noted that if F(λ,σ) is positive the acoustic radiation force will make particles to be concentrated at the nodes,and if F(λ,σ) is negative the acoustic radiation force will make particles to be concentrated at the ***,the radiation force due to the standing wave field can be utilized to separate microparticles within the *** can derive the relationships between the radiation force and particle *** some biological par

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中西医结合学报 2011年第5期9卷 570-574页

作者： Sunil Kumar Vipin Kumar om prakash Institute of pharmaceutical Sciences Kurukshetra University

目的:使用实验性糖尿病Wistar大鼠模型验证五桠果(Dillenia indica)甲醇提取物的生物活性成分(乙酸乙酯馏分)的降血糖及降血脂作用。方法:通过腹腔内注射链脲佐菌素(60mg/kg)建立大鼠1型糖尿病模型,腹腔内注射烟酰胺(120mg/kg)15min后... 详细信息

目的:使用实验性糖尿病Wistar大鼠模型验证五桠果(Dillenia indica)甲醇提取物的生物活性成分(乙酸乙酯馏分)的降血糖及降血脂作用。方法:通过腹腔内注射链脲佐菌素(60mg/kg)建立大鼠1型糖尿病模型,腹腔内注射烟酰胺(120mg/kg)15min后腹腔内注射链脲佐菌素(60mg/kg)建立大鼠2型糖尿病模型。在不同的实验模型中,用药组大鼠均分别给予200mg/kg和400mg/kg的五桠果甲醇提取物的乙酸乙酯馏分连续21d。使用血糖仪每周1次测定各组大鼠血糖水平。使用自动分析仪器分别测定各组大鼠血清总胆固醇、三酰甘油及高密度脂蛋白胆固醇水平。结果:在两个实验模型中,与模型组比较,五桠果甲醇提取物的乙酸乙酯馏分均能显著降低模型大鼠的血糖水平(pppp<0.05)。结论:五桠果甲醇提取物的乙酸乙酯馏分在400mg/kg剂量时,对于1型及2型糖尿病模型大鼠具有显著的治疗作用。因此这种提取物有望被研究开发成为治疗糖尿病的又一替代药物。

关键词：五桠果科植物提取物糖尿病,实验性降血糖药降血脂药大鼠

Effects of Thermal Diffusion and Chemical Reaction on MHD Flow of Dusty Visco-Elastic (Walter’s Liquid Model-B) Fluid

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Journal of Electromagnetic Analysis and Applications 2010年第10期2卷 581-587页

作者： om prakash Devendra Kumar Y. K. Dwivedi Department of Mathematics Ganjdundwara P.G. College Ganjdundwara Kashiram Nagar (U.P.)-India Department of Mathematics Hindustan College of Science and technology Farah Mathura (U.P.)-India

The present note consists, the effects of thermal diffusion and chemical reaction on MHD flow of dusty viscous incom-pressible, electrically conducting fluid between two vertical heated, porous, parallel plates with heat source/sink. The plate temperature is raised linearly with time and concentration level near the plate to Cw. The variable temperature and uniform mass diffusion taking into account the chemical reaction of first order. The series solution method is used to solve the mathematical equations. Effects of various parameters like chemical reaction (K), thermal diffusion (ST) and magnetic field (M) etc. on velocity profile, skin friction, concentration profile and temperature field are displayed graphically and discussed numerically for different physical parameters. The analysis developed here for thermal diffusion, bears good agreement with real life problems.

关键词： MHD Flow Thermal Diffusion (Soret Effect) Heat Source/Sink Skin Friction

On probability of Undetected Error for Hamming Codes over Q-ary Symmetric Channel

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通讯和计算机（中英文版） 2011年第4期8卷 259-263页

作者： Manish Gupta Jaskam Singh Bhullar om parkash Vinocha D.A.V. College Bathinda 151001 India Malout Institute of Management and Technology Malout 152107 India Ferozepur College of Engineering and Technology Ferozepur 142052 India

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铁矿石粒度对生球团性能的影响(英文)

世界钢铁 2013年第4期13卷 35-40+45页

作者： T Umadevi Naveen F Lobo Rameshwar sah p C Mahapatra 金达尔钢公司

高炉和COREX工艺对铁矿球团的质量提出了要求。铁矿球团的质量由生球质量和焙烧参数决定。生球特性由矿石的成球行为和矿石特性决定,矿石特性包括矿石的化学成分、矿石本质(硬度)、比表面积和粒度分布。金达尔钢公司的铁矿石来自Bellary... 详细信息

高炉和COREX工艺对铁矿球团的质量提出了要求。铁矿球团的质量由生球质量和焙烧参数决定。生球特性由矿石的成球行为和矿石特性决定,矿石特性包括矿石的化学成分、矿石本质(硬度)、比表面积和粒度分布。金达尔钢公司的铁矿石来自Bellary-Hospet地区的不同矿点。用于实验室研究的3种铁矿粉(矿1、矿2和矿3)来自3个不同的矿点。用矿1、矿2、矿3和矿4(混矿)制成不同的生球。矿石的邦德功指数的变化范围为6～11kWh/t。从矿石的本质来说,矿1较软,而矿3较硬,其硬度范围为:1～3。矿石的粒度范围为:-45μm占56%～68%。为理解矿石粒度对生球特性的影响,研究了生球的落下次数、压溃强度,干燥后压溃强度,孔隙度和堆密度。随着矿石粒度的降低,平均落下次数增加。平均落下次数的变化范围为6.5～14.7,不同矿石的生球落下次数的排序为矿1>矿2>矿4>矿3。矿1、矿2和矿4的生球GCS和DCS随着-45μm部分比例的增加而提高,在64%时达到最大值,而后随着-45μm部分比例的继续提高而降低。生球的GCS和DCS变化范围分别为1.35～2.77kg/p和2.3～5.4kg/p。生球的孔隙度随着矿石粒度的降低而下降,矿3的孔隙度较高,矿1的孔隙度较低,这和矿石的硬度相关。生球的堆密度随矿石粒度的降低而增大。生球的堆密度范围为2.0～2.3kg/m3,生球堆密度顺序为矿1>矿4>矿2>矿3。

关键词：铁矿石成球粒度生球物理特性

A reliable auditing of postop complication in gastric cancer surgery

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国际外科学杂志 2007年第11期34卷 788-792,F0003-F0004页

作者： Birendra Kumar sah WANG Xiao-Yan ZHU Zheng-Gang YAN-Min CHEN Jun XIANG MingDepartment of General Surgery Rui Jin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai Institute of Digestive Surgery Shanghai 200025 China

Background Auditing of surgical outcome is controversial due to lack of standard auditing system. pOSSUM (physiological and Operative Severity Score for the enUmeration of Morbidity and mortality)system provides a risk adjusted auditing in surgical practice, which is a reliable scoring system. However it has not been generalized in China, especially in gastric surgery. present study evaluates the application of pOSSUM system to compare surgical outcome of malignant gastric disease between specialized unit and general unit. Methods Retrospective study was performed on 394 patients who underwent surgical intervention for gastric cancer and malignant gastric lymphoma. pOSSUM data were collected according to standard criteria described by its original authors. Exponential analysis method was used for data analysis. Observed to Expected morbidity (O:E) ratio was calculated for each unit to give risk adjusted comparison. All the complications were categorized into minor to severe to give an objective view of complications. Results There was significant difference in surgical outcome between specialized unit and general unit. pOSSUM predicted morbidity well and O: E ratio of specialized unit was better than general unit. Further more postop stay wassignificantly shorter(p ＜0.001 ) in specialized unit and number of moderate and severe morbidity was significantly lower (p＜0.001) than general unit. Conclusions Surgical outcome of specialized unit was better than general unit. pOSSUM can be used for risk adjusted auditing of postop complications in malignant gastric disease, which provides a reliable audit. However morbidity definition in pOSSUM should be amended and modification in pOSSUM formula may be necessary to fit major surgical interventions like gastric cancer surgery.

关键词：胃癌外科手术治疗并发症审核系统手术结局

用8-羟基喹啉快速测定钼铁和钼添加剂中的钼

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铁合金 1988年第5期 55-56页

作者： om p. Bhargava 许孙曲

提出不快速重量分析法测定钼铁和钼添加剂中的铝(以8-羟基■盐形式)。在锆坩埚中用过氧化钠与碳酸钠混合助熔剂使试样熔化以达到完全分解。用水浸取冷却的熔块,使钼以钼酸钠形式与铁(Ⅲ)和其它含水氧化物立即分离。过滤后,在加入 EDTA ... 详细信息

提出不快速重量分析法测定钼铁和钼添加剂中的铝(以8-羟基■盐形式)。在锆坩埚中用过氧化钠与碳酸钠混合助熔剂使试样熔化以达到完全分解。用水浸取冷却的熔块,使钼以钼酸钠形式与铁(Ⅲ)和其它含水氧化物立即分离。过滤后,在加入 EDTA 和草酸后,用8-羟基喹啉沉淀钼,并用重量分析法测定。精密度与准确度和标准法差不多。

关键词：碳酸钠 EDTA 含水完全分解纯碱碳酸盐络合试剂过氧化物过氧化钠羟基喹啉氢氧化物氢氧化钠高锰酸盐滴定羧酸盐类草酸盐烧杯重量分析法添加剂钼铁

An Inventory of the Above Ground Biomass in the Mau Forest Ecosystem,Kenya

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Open Journal of Ecology 2014年第10期4卷 619-627页

作者： Mwangi James Kinyanjui petri Latva-Kayra prasad sah Bhuwneshwar patrick Kariuki Alfred Gichu Kepha Wamichwe Department of Resource Surveys and Remote Sensing NairobiKenya Arbonaut Oy Ltd. HelsinkiFinland pASCO Corporation TokyoJapan Kenya Forest Service NairobiKenya Natural Resource Information&Technology Ltd. NairobiKenya

Biomass assessment of the Mau Forest Ecosystem (MFE) was done as part of Kenya’s greenhouse gas inventory. Trans Mara and Mount Londiani forest blocks representing extremes of vegetation types in the MFE were selected for ground data. Based on canopy closure, four forest strata were identified as very dense, moderately dense, open and bamboo. In each stratum, 5 clusters each with 4 plots measuring 30 m × 30 m were located. Big trees (D1.3 ≥ 10 cm) were measured per species for diameter at breast height (D1.3) in the whole plot while height was measured for every 5th tree. poles (10 cm > D1.3 ≤ 5) were measured for D1.3 in a 10 × 10 m concentric sub plot. Saplings (5 cm > D1.3;ht ≥ 1.5 m) and seedlings (ht per species within 5 × 5 m and 2 × 2 m concentric sub plots, respectively. Data were recorded in a personal Digital Assistant (pDA) and quality checked with Open Foris Collect software. Allometric equations that have been used for similar vegetation in Kenya were used to relate D1.3 and height with biomass. The tree data were uploaded to ArboWebForest (AWF) cloud-service and using the AWF-SIMO calculation tool, average values of diameter, height, and biomass were calculated for each plot. The data were generalised to cover all areas for each block using the Sparse Bayesian linear regression process on the vegetation characteristics with 10 m resolution ALOS-AVNIR-2 images of the MFE. ANOVA was used to compare biomass generated from several allometric equations. Results show that the average biomass of the MFE was 236 Mg·ha1. Degradation that converts dense forests into open and moderately dense forests contributed to a biomass loss of 228 Mg·ha1 and 194 Mg·ha1 respectively. Four allometric equations gave no significant difference (p omass for the 80 plots implying that costly processes of developing new equations may not improve accuracy. The study offers a learning lesson in Kenya’s forest inventory processes and the biomass v

关键词： Forest Biomass Inventory

大鼠卵巢促黄体激素受体膜外微区(1-341)在昆虫细胞中的表达及其性质的初步研究

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实验生物学报 1995年第4期28卷 381-387页

作者：申庆祥李昌麟沈惠刘海湖黄有国 W.Chen om p.Bahl 中国科学院上海细胞生物学研究所上海200031 中国科学院生物物理研究所北京100101 美国纽约州立大学布法罗分校生物科学系纽约14260

促黄体激素/人绒毛膜促性腺激素受体(LH/hCG receptor)N端膜外微区341个氨基酸残基(简称R341)与激素有很高的亲和力。本文报道编码R341的cDNA在昆虫细胞中的表达及其产物性质的初步研究。SDS-pAGE银染和免疫印迹结果显示,表达产物呈两条... 详细信息

促黄体激素/人绒毛膜促性腺激素受体(LH/hCG receptor)N端膜外微区341个氨基酸残基(简称R341)与激素有很高的亲和力。本文报道编码R341的cDNA在昆虫细胞中的表达及其产物性质的初步研究。SDS-pAGE银染和免疫印迹结果显示,表达产物呈两条带:分子量为38.5Kd的主带和分子量为40.0Kd的次带。配基结合免疫印迹和^(125)IhCG结合印迹分析表明,表达产物R341具有与配基专一性结合的生物活力。竞争性配基结合曲线和Scatchard分析结果显示,重组受体R341和配基hCG有较高的亲和力,与hCG反应的Kd为5.68×10^(-10)mol/L。

关键词：促黄体激素 hCG cDNA 昆虫细胞表达