检索结果-南通市图书馆

Amberlyst-15 catalyzed synthesis of alkyl/aryl/heterocyclic phosphonates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第8期22卷 895-898页

作者： U.M.rao Kunda V.N.Reddy Mudumala C.S.Reddy Gangireddy B.R.Nemallapudi K.N.Sandip S.R.Cirandur Department of Chemistry Sri Venkateswara UniversityTirupati 517502.India Bio-Organic Division BARCMumbaiIndia

A novel and efficient procedure for the synthesis of alkyl phosphonates through one pot condensation of alkyl halide and trialkyl /aryl phosphite in the presence of Amberlyst-15 as catalyst under solvent free conditions was *** demonstrated several advantages such as good yields of products,simple operation,convenient separation and inexpensive catalyst.

关键词： Dialkyl/aryl alkyl phosphonates Amberlyst-15

Wind Motions around the Tropical Cirrus Using Simultaneous Radar and Lidar Observations over Gadanki (13.45°N, 79.18°E), India

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Geosciences 2014年第11期5卷 1241-1253页

作者： C. Dhananjaya rao M. Arunachalam Srinivasan M. Krishnaiah Y. Bhavani Kumar S. V. B. rao Department of Physics Sri Venkateswara University Tirupati India Seshachala Institute of Technology Puttur India National Atmospheric Research Laboratory (NARL) Gadanki India

The present study describes variation of peak linear depolarization ratio (LDR) with wind around the cloud altitude using simultaneous observation of winds and cirrus cloud for the first time using Indian MST radar and polarization lidar co-located over a low latitude station Gadanki (13.7°N and 79.2°E). Three different cases of passage of the cirrus at different altitudes are noticed, one during a North-East monsoon day and other two during South-West monsoon days. The zonal wind below the cloud height has shown similar variation with LDR during 02 November 2006 and the meridional wind within the cloud height during 25 July 2007 and 08 June 2006 has shown opposite variation with LDR. Even though there is a significant increase in zonal wind due to the existence of tropical easterly jet (TEJ) above cloud height during 25 July 2007 and 08 June 2006, also, the vertical wind is found to be continuously varying during 25 July 2007 and it is upward dominant in the initial stage and is mostly downward in the later stage of observation on 08 June 2006, there is a slight descent in cloud altitude only during 25 July 2007. Thus, the wind above the cloud height alone may not affect the ascent/descent of the cloud top altitude. The potential temperature gradient is high within the cloud heights when the cirrus present near the cold point tropopause indicates the maximum air-mass mixing near the tropopause.

关键词： Cirrus Cloud LDR Winds TEJ Lidar Radar

Hepatoprotective effect of Solatium xanthocarpum fruit extract against CCl_4 induced acute liver toxicity in experimental animals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2011年第12期4卷 964-968页

作者： Ramesh K Gupta Talib Hussain G.Panigrahi Avik Das Gireesh Narayan Singh K Sweety Md Faiyazuddin Chandana venkateswara rao Pharmacognosy and Ethnopharmacology Division National Botanical Research InstituteLucknowUttar Pradesh 226001India Department of Pharmacology Royal College of Pharmacy and Health Sciences Berhampur -760002(Orissa) Pharmacognosy and Ethnopharmacology Division National Botanical Research InstituteLucknow.Uttar Pradesh 226001India Department of Pharmacology Integral UnivercityLucknow Uttar Pradesh 226001.India Department of Pharmacognosy The Pharmaceutical College Barapali-768029(Orissa)

Objective:To investigate the hepatoprotective potential of Solonum xanthocarpum（Solanaceae）（***） in experimental rats to validate its traditional ***:50%ethanolic fruit extract of ***（SXE,100.200 or 400 mg/kg hods weight） was administered daily for 14davs in experimental *** injury was induced chemically,by CCl4 administration （1 mL/kg i.p.）.The hepatoprotective activity was assessed using various biochemical parameters like aspartate aminotransferase（AST）,alanine aminotransferase（ALT）.Serum alkaline phosphatise （SALP） and total ***,in vivo antioxidant activities as lipid peroxidation（LPO）, reduced glutathione（GSH）.superoxide dismutase（SOD） and calalase（CAT） were screened along with histopathological ***:Obtained results demonstrated that the treatment with SXE significantly（P<0.05- <0.001） and dose-dcpendcntly prevented chemically induced increase in serum levels of hepatic *** significantly（up to P<0.001） reduced the lipid peroxidation in the liver tissue and restored activities of defence antioxidant enzymes GSH,SOU and catalasc towards normal *** of the liver tissue showed that SXE attenuated the hepatocellular necrosis and led to reduction of inflammatory cells inflltration. Conclusions:The results of this study strongly indicate the protective effect of SXE against acute liver injun which may he attributed to its hepatoprotective activity,and there by scientifically support its traditional use.

关键词： Solanum xanthocarpum Hepatoprotective CCl4 Antioxidant Alkaline phosphatise

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

马拉松制剂的测定

世界农药 1985年第1期 46-47+17页

作者： P.V.V.Prasada rao 陆贻通印度Sri venkateswara大学工学院

Clark 和 Qazi(1980)报道了马拉松在四氯化碳和乙醇钠中进行定量水解,所得二甲基二硫代磷酸钠在酸性溶液中,变成浅黄色化合物,可用四氯化碳萃取。

关键词：马拉松乳油二甲基二硫农药剂型氯代烃四氯化碳二硫代磷酸制剂

Numerical Modeling of Non-Similar Mixed Convection Heat Transfer over a Stretching Surface with Slip Conditions

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Mechanics 2015年第6期5卷 117-128页

作者： A. Subba rao V. R. Prasad N. Nagendra K. V. N. Murthy N. Bhaskar Reddy O. Anwar Beg Department of Mathematics Madanapalle Institute of Technology and Science Madanapalle India Department of Mathematics Sri Venkateswara University Tirupathi India Gort Engovation Research (Propulsion and Biomechanics) Bradford UK

In this paper, the heat transfer effect on the steady boundary layer flow of a Casson fluid past a stretching surface in the presence of slip conditions was analyzed. The stretching surface is maintained at a constant temperature. The boundary layer conservation equations, which are parabolic in nature, are normalized into non-similar form and then solved numerically with the well-tested, efficient, implicit, stable Keller-box finite difference scheme. The resulting equations are solved numerically by using the Kellerbox finite-difference method, and the expressions for velocity and temperature are obtained. They satisfy all imposed initial and boundary conditions and reduce to some well-known solutions for non-Newtonian fluids. Numerical results for velocity, temperature, skin friction and Nusselt number are shown in various graphs and discussed for embedded flow parameters. It is found that both velocity and temperature decrease with an increase of the Casson fluid parameter.

关键词： Stretching Surface Non-Newtonian Fluid Slip Condition Keller-Box Numerical Method Heat Transfer Skin Friction Coefficient

Potential Application of Silica Aerogel Granules for Cleanup of Accidental Spillage of Various Organic Liquids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electron Emission of Graphene-Diamond Hybrid Films Using Paraffin Wax as Diamond Seeding Source

Soft Nanoscience Letters（软纳米科学报） 2011年第4期

作者： Vinayak G. Parale Dinesh B. Mahadik Mahendra S. Kavale A. venkateswara rao Pratap B. Wagh Satish C. Gupta Air Glass Laboratory Department of Physics Shivaji University Applied Physics Division Bhabha Atomic Research Centre

来源：评论

学校读者我要写书评

暂无评论

铁苋菜叶提取物抑制大鼠实验性心肌缺血的生物化学和组织病理学研究(英文)

World Journal of Nano Science and Engineering（纳米科学与工程） 2012年第3期

作者： Deepak Varshney Chitturi venkateswara rao Frank Mendoza Kenneth Perez Maxime J.-F.Guinel Yasuyuki Ishikawa Brad R.Weiner Gerardo Morell

来源：评论

学校读者我要写书评

暂无评论

中西医结合学报 2012年第7期10卷 784-792页

作者： Kalla C.Mouli Tartte Vijaya Sirpurkar Dattatreya rao Department of Biotechnology Sri Venkateswara UniversityTirupati 517502Andhra PradeshIndia Department of Botany Sri Venkateswara UniversityTirupati 517502Andhra PradeshIndia Department of Shalya Sri Venkateswara Ayurvedic CollegeTirupati 517502Andhra PradeshIndia

目的:研究富含类黄酮的热带铁苋菜叶的甲醇提取物抗心肌缺血的作用。方法:用异丙肾上腺素诱导大鼠心肌缺血。成年Wistar白化大鼠经热带铁苋菜提取物(100和200mg/kg大鼠体质量,口服)30d预处理后连续2d注射异丙肾上腺素(85mg/kg大鼠体质量... 详细信息

目的:研究富含类黄酮的热带铁苋菜叶的甲醇提取物抗心肌缺血的作用。方法:用异丙肾上腺素诱导大鼠心肌缺血。成年Wistar白化大鼠经热带铁苋菜提取物(100和200mg/kg大鼠体质量,口服)30d预处理后连续2d注射异丙肾上腺素(85mg/kg大鼠体质量,皮下注射)。第2次注射异丙肾上腺素后12h,肌肉注射氯胺酮(24mg/kg大鼠体质量)处死大鼠。检测血浆总胆固醇、三酰甘油、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇、极低密度脂蛋白胆固醇、游离脂肪酸、磷脂质以及心肌脂质、肝脏脂质的含量,以衡量热带铁苋菜提取物的抗心肌缺血作用,同时观察大鼠心脏组织的组织病理学变化。结果:与模型组大鼠相比,所有热带铁苋菜提取物给药组(100和200mg/kg)大鼠的血浆脂质水平改善,且与正常组相比无明显变化。模型组大鼠心脏组织病理学结果显示心肌纤维缺失,广泛性心内膜下坏死,炎症细胞浸润,心肌细胞明显水肿,空泡变性。而经200mg/kg热带铁苋菜提取物预处理的大鼠心脏组织观察到较完整的心肌结构,心肌纤维可见,没有炎症细胞浸润、细胞水肿和坏死现象。结论:本研究的生化指标及组织学结果表明热带铁苋菜可抑制异丙肾上腺素诱导的大鼠心肌缺血。

关键词：热带铁苋菜心肌缺血植物提取物类黄酮物质降血脂药大鼠