检索结果-南通市图书馆

Selective nitration of phenols using bismuth subnitrate/charcoal in the presence of trichloroisocyanuric acid under aprotic conditions

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第11期21卷 1283-1286页

作者： Ali Reza pourali Fatemeh Fatemi School of Chemistry Damghan University of Basic Sciences

A mild,efficient and regioselective method for the mononitration of phenolic compounds is described using bismuth subnitrate/ charcoal in the presence of trichloroisocyanuric acid in CH2Cl2 at room temperature.

关键词： Nitration Phenol Bismuth subnitrate Supported reagent

Direct Iodination of Aromatic Compounds with Polyvinylpyrrolidone Supported Hydrogen Peroxide （PVP-H2O2） and Potassium Iodide or Molecular Iodine

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2006年第8期24卷 1077-1079页

作者： pourali, Ali Reza GHANEI, Mersieh Department of Chemistry Damghan University of Basic Sciences Damghan Iran

Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW... 详细信息

关键词： iodinated aromatic compounds iodination hydrogen peroxide supported reagents

A novel and selective oxidation of benzylic alcohols with polymer-supported periodic acid under mild aprotic conditions

维普期刊数据库评论

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 2012年第1期23卷 21-24页

作者： Ali Reza pourali Mehrosadat Tabaean S.Mohamad Reza Nazifi School of Chemistry Damghan UniversityDamghan 36715/364Iran

A new polymeric oxidizing reagent was prepared by supporting periodic acid on poly（1,4-phenylene-2,5-pyridine dicarboxyamide）. This polymeric reagent was used for the selective oxidation of primary benzylic alcohols to the corresponding benzaldehydes in CH_3CN at reflux *** selectivity was observed between primary benzyl alcohols and secondary ones as well as non-benzylic alcohols in the oxidation *** alcohols were also converted to the corresponding aldehydes with good yields.

关键词： Oxidation Benzylic alcohol Polymer-supported reagent Periodate

Catalytic performance of nano-hybrid graphene and titanium dioxide modified cathodes fabricated with facile and green technique in microbial fuel cell

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2017年第6期27卷 647-651页

作者： M.Mashkour M.Rahimnejad S.M.pourali H.Ezoji Ahmed ElMekawy Deepak Pant Biofuel and Renewable Energy Research Center Department of Chemical Engineering Babol Noshirvani University of Technology Genetic Engineering and Biotechnology Research Institute University of Sadat City (USC) School of Chemical Engineering The University of Adelaide Separation and Conversion Technologies Flemish Institute for Technological Research (VITO)

Finite resources of the world’s fossil fuel give rise to the irresistible urge to explore alternative renewable energy routes such as microbial fuel cells（MFCs）. The limited productivity is one of the main obstacles for MFC scalability. In this study, a dual-chamber MFC was assembled and equipped with fabricated modified cathodes with titanium dioxide（TiO;） or hybrid graphene（HG） which mainly improved the catalytic activity of the *** graphite paste（GP） bare electrode was modified by both nanomaterials using a green and facile *** results showed that the modified cathodes resulted in a considerable improvement for the MFC performance,i.e., the power density reaching levels of 80 mW/m;for GP-TiO;and 220 mW/m;for GP-HG compared to 30 mW/m;for GP electrode. Additionally, the modified electrodes exhibited lower charge transfer resistance(R;) compared to the bare electrode. Therefore, these modified electrodes, fabricated by an eco-friendly method,could be used as alternatives to the precious expensive metals like Pt.

关键词： Microbial fuel cell Cathode Graphite paste Titanium dioxide Graphene oxide Power density

Seismic performance of non-structural components and contents in buildings: an overview of NZ research

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2016年第1期15卷 1-17页

作者： Rajesh P Dhakal Atefeh pourali Ali Sahin Tasligedik Trevor Yeow Andrew Baird Gregory Mac Rae Stefano Pampanin Alessandro Palermo Department of Civil and Natural Resources Engineering University of Canterbury UC Quake Centre University of Canterbury BECA

This paper summarizes the research on non-structural elements and building contents being conducted at University of Canterbury in New Zealand. Since the 2010-2011 series of Canterbury earthquakes, in which damage to non-structural components and contents contributed heavily to downtime and overall financial loss, attention to seismic performance and design of non-structural components and contents in buildings has increased exponentially in NZ. This has resulted in an increased allocation of resources to research leading to development of more resilient non-structural systems in buildings that would incur substantially less damage and cause little downtime during earthquakes. In the last few years, NZ researchers have made important developments in understanding and improving the seismic performance of secondary building elements such as partitions, facades, ceilings and contents.

关键词： non-structural elements building contents drywall partition cladding suspended ceilings seismicperformance assessment fragility analysis experimental evaluation loss estimation

在线全文

学校读者我要写书评

暂无评论

山黧豆属作物在土耳其的栽培与利用状况

西北植物学报 2022年第3期42卷 517-526页

作者： Parisa pourali Kahriz Mahsa pourali Kahriz Surendra Barpete Khalid Mahmood Khawar Department of Field Crops Faculty of Agriculture Ankara University Diskapi Ankara 06110 Turkey ICARDA-FLRP Amlaha Sehore Madhya Pradesh 46613 India

众所周知,山黧豆起源于巴尔干半岛并传播到世界各地。在土耳其,山黧豆属作物有73个分类群(约1/3为地方特有种),在全国各地均有分布种植,但主要集中在黑海中部、东南部和安纳托利亚东部地区。该文介绍了山黧豆属作物在土耳其全国的分布... 详细信息

众所周知,山黧豆起源于巴尔干半岛并传播到世界各地。在土耳其,山黧豆属作物有73个分类群(约1/3为地方特有种),在全国各地均有分布种植,但主要集中在黑海中部、东南部和安纳托利亚东部地区。该文介绍了山黧豆属作物在土耳其全国的分布和在局部地区的食用、观赏等资源利用和保存情况。通常,不同国家人民会因为文化差异形成不同的饮食习惯,但山黧豆大多被用于制作汤、面包或其他咸点。山黧豆的栽培技术则因地制宜,土耳其在边缘土地上进行旱作种植,中国和印度部分地区多采用轮作种植方法等。作为一种极“小众”的作物,山黧豆研究工作的从业人员极少,而且缺乏大型联合研究项目。因此,需要联合化学、表型和分子分析等方法,以保护世界各地包括土耳其在内的地方种质资源,尤其是培育适合土耳其、中国等世界各国的食饲兼用型低β-ODAP品种。总之,选育低β-ODAP或不含β-ODAP的山黧豆品种将有助于丰富人类在食用、饲用和观赏等方面的物种资源利用。

关键词：山黧豆山黧豆属作物特有种濒危物种饲草育种

Serum γ-glutamyltransferase,alanine aminotransferase,and aspartate aminotransferase activity in Iranian healthy blood donor men

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第6期13卷 889-894页

作者： Hossein Khedmat Farahnaz Fallahian Hassan Abolghasemi Bashir Hajibeigi Zohre Attarchi Farshid Alaeddini Mohammad Taghi Holisaz Masoumeh pourali Shahin Sharifi Nasrin Zarei Baqiyatallah University of Medical Sciences Iran Iranian Blood Transfusion Organization Research Center Tehran Iran

AIM: To determine serum γ-glutamyltransferase (GGT), alanine aminotransferase (ALT), and aspartate aminotransferase (AST) activity, and to assess their correlation with demographic and clinical findings in healthy blood donors. METHODS: This cross-sectional study was performed in 934 male blood donors, aged 18 to 68 years, who consecutively attended Tehran blood transfusion service in 2006. All participants were seronegative for HBV or HCV infections, non alcohol users, and all underwent a standard interview and anthropometric tests. Clinical and biochemical parameters including AST, ALT, and GGT activities were determined. Patients taking drugs known to cause hepatic fat deposition were excluded. For AST, ALT, and GGT variables, we used 33.33 and 66.66 percentiles, so that each of them was divided into three tertiles. RESULTS: Mean AST, ALT, and GGT activities were 25.26 ± 12.58 U/L (normal range 5-35 U/L), 33.13 ± 22.98 (normal range 5-35 U/L), and 25.11 ± 18.32 (normal range 6-37 U/L), respectively. By univariate analyses, there were significant associations between increasing AST, ALT, or GGT tertiles and age, body weight, body mass index, and waist and hip circumferences (P < 0.05). By multiple linear regression analyses, ALT was found to be positively correlated with dyslipidemia (B = 6.988, P = 0.038), whereas ALT and AST were negatively correlated with age. AST, ALT, and GGT levels had positive correlation with family history of liver disease (B = 15.763, P < 0.001), (B = 32.345, P < 0.001), (B =24.415, P < 0.001), ***: Although we did not determine the cutoffs of the upper normal limits for AST, ALT, and GGT levels, we would suggest screening asymptomatic patients with dyslipidemia and also subjects with a family history of liver disease.

关键词： γ-glutamyltransferase Alanine aminotransrerase Aspartate aminotransferase Blood donor

黎曼流形上广义Yamabe方程的多重解及对Emden-Fowler方程的应用（英文）

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

纯粹数学与应用数学 2019年第3期35卷 253-268页

作者：廖芳芳 Heidarkhani Shapour Afrouzi Ghasem A Roudbari Sina pourali 东南大学数学系江苏南京210096 上海师范大学数学系上海200234 Faculty of Sciences Razi University Kermanshah 67149 Iran Faculty of Mathematical Sciences University of Mazandaran Babolsar 57416 Iran

运用变分方法和由Ricceri所建立的关于四个临界点的定理证明了黎曼流形上广义Yamabe方程的多重若揭的存在性.作为应用,考虑在无穷远处包含次线性项的Emden-Fowler方程.

关键词：广义Yamabe方程黎曼流形变分方法 Emden-Fowler问题临界点理论