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Chinese Chemical Letters 2011年第8期22卷 927-930页

作者： Ebrahim Soleimani Mohammad Mehdi Khodaei Afsaneh Taheri kal Koshvandi Department of Chemistry Razi UniversityKermanshah 67149Iran

An efficient method for the synthesis of 14-alkyl or aryl 14H-dibenzo[a,j.xanthene derivatives by the reaction of β-naphthol,and aldehydes in the presence of a catalytic amount of bismuth（Ⅲ） chloride（BiCl_3） under solvent-free conditions at 110℃is *** and aromatic aldehydes were used in the reaction and in all cases the desired products were synthesized *** reaction was studied under different temperatures;the maximum yield was obtained in a short reaction period at 110℃.The method offers the advantages of high yields,short reaction times,simplicity and easy workup compared to the conventional method of syntheses.

关键词： Bismuth(Ⅲ) chloride 14H-Dibenzo[a j.xanthenes β-Naphthol

Radio-frequency magnetron sputtered thin-film La_(0.5)Sr_(0.5)Co_(0.95)Nb_(0.05)O_(3-δ) perovskite electrodes for intermediate temperature symmetric solid oxide fuel cell(IT-SSOFC)

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Materials Reports(Energy) 2022年第2期2卷 75-85页

作者： Vicky Dhongde Aditya Singh j.otsana kal Uzma Anj.m M.Ali Haider Suddhasatwa Basu Chemical Engineering Department Indian Institute of Technology DelhiHauz KhasNew Delhi110016India Department of Physics Indian Institute of Technology DelhiHauz KhasNew Delhi110016India National University of Singapore 21 Lower Kent Ridge Rd119077Singapore

The present work explores the application of La_(0.5)Sr_(0.5)Co_(0.95)Nb_(0.05)O_(3-δ)(LSCNO)perovskite as electrode material for the symmetric solid oxide fuel *** solid oxide fuel cells of thin-film LSCNO electrodes were prepared to study the oxygen reduction reaction at intermediate *** Rietveld refinement of syn-thesized material shows a hexagonal structure with the R-3c space group of the prepared perovskite *** parameter and fractional coordinates were utilized to calculate the oxygen ion diffusion coefficient for molecular dynamic *** 973 K,the oxygen ion diffusion of LSCNO was 1.407×10^(-8)cm^(2)s^(-1) higher by order of one magnitude than that of the La_(0.5)Sr_(0.5)Co_(0.95)Nb_(0.05)O_(3-δ)(7.751×10^(-9)cm^(2)^(-1)).The results suggest that the Nb doping provide the structural stability which improves oxygen anion *** enhanced structural stability was analysed by the thermal expansion coefficient calculated experimentally and from molecular dynamics ***,the density functional theory calculation revealed the role of Nb dopant for oxygen vacancy formation energy at Sr-0 and La-O planes is lower than the undoped *** understand the rate-limiting process for sluggish oxygen diffusion kinetics,80 nm and 40 nm thin films were fabricated using radio frequency magnetron sputtering on gadolinium doped ceria electrolyte *** impedance was observed to increase with an increasing thickness,suggesting the bulk diffusion as a rate-limiting step for oxygen ion *** electrochemical performance was analysed for the thin-flm symmetric solid oxide fuel cell,which achieved a peak power density of 390 mW cm^(-2) at 1.02 V in the presence of H_(2) fuel on the anode side and air on the cathode side.

关键词： Symmetric solid oxide fuel cell Thin-film electrode Diffusion coefficient Molecular dynamics Radio-frequency magnetron sputtering Intermediate temperature

Design and optimization of electrochemical cell potential for hydrogen gas production

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j.urnal of Energy Chemistry 2021年第1期30卷 421-427,I0013页

作者： Nawar kal-Shara Farooq Sher Sania ZIqbal Oliver Curnick George ZChen Department of Chemical and Environmental Engineering Faculty of EngineeringUniversity of NottinghamUniversity ParkNottingham NG72RDUK School of Mechanical Aerospace and Automotive EngineeringFaculty of EngineeringEnvironmental and ComputingCoventry UniversityCoventry CV12JHUK Department of Biochemistry University of AgricultureFaisalabad 38000Pakistan Institute for Future Transport and Cities Coventry UniversityCoventry CV15FBUK Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaUniversity ParkNingbo 315100China

This study deals with the optimization of best working conditions in molten melt for the production of hydrogen(H2) *** research has been carried out on how electrochemical process occurs through steam splitting via molten hydroxide.54 combinations of cathode,anode,temperature and voltage have been investigated for the optimization of best working conditions with molten hydroxide for hydrogen gas *** these electrochemical investigations were carried out at 225 to 300℃ temperature and 1.5 to 2.5 V applied voltage *** current efficiency of 90.5,80.0 and 68.6% has been achieved using stainless steel anodic cell with nickel,stainless steel and platinum working cathode *** nickel cathode,an increase in the current directly affected the hydrogen gas flow rate at *** can be hypothesized from the noted results that increase in current is directly proportional to operating temperature and applied *** values were noted when the applied voltages increased from 1.5 to 2.5 V at 300℃,the flow rate of hydrogen gas increased from 1.5 to 11.3 cm^(3) min^(-1),1.0 to 13 cm^(3) min^(-1) in case of electrolysis@stainless steel and@graphite anode *** is observed that the current efficiency of stainless steel anodic cell was higher than the graphite anodic ***,steam splitting with the help of molten salts has shown an encouraging alternate to current methodology for H2 fuel production.

关键词： Sustainable energy Splitting steam Electrolysis Hydrogen gas production Electrochemical cell and Variable cathodes

Domestication-related changes in seed dispersal and pigmentation:Visual selection and functional trait?

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Molecular Plant 2023年第8期16卷 1240-1242页

作者： Petr Smykal Travis Parker Department of Botany Palacky University in Olomouc77900 OlomoucCzech Republic Department of Plant Sciences University of CaliforniaDavisDavisCA 95616USA

The development of agriculture is one of the most transformative changes in the history of *** the most common changes occurring during plant domestication are reductions in seed dispersal and changes in *** there are archaeological records of these processes,the advancement of genomics offers a tool to achieve greater insight into the process of converting wild plants into crops(Smýkal et al.,2018).This involved and resulted in a set of specific phenotypic changes referred to collectively as the domestication ***,less obvious domestication-related modifications have also been identified,including changes in plant *** processes are often *** example,among visible changes,selection for visual appearance such as pigmentation is governed by modulation of specific metabolic *** genomic tools,the improvement of analytical methods provides the opportunity to reveal metabolomic changes involved in plant domestication.

关键词： Visual collective crops

Multivariate statistical methods and GIS based evaluation of the health risk potential and water quality due to arsenic pollution in the K?z?l?rmak River

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International j.urnal of Sediment Research 2022年第6期37卷 754-765页

作者： Hüseyin Cüce Erkan kal?pc? Fikret Ustao?lu Ilknur Kaynar Volkan Baser Mustafa Türkmen Deparment of Geomatics Engineering Giresun University Department of Biology Giresun University Deparment of Environmental Engineering Nevsehir Hac? Bektas Veli University

The K?z?l?rmak River is Turkey?s longest(1,355 km) river and it is important since it constitutes the drinking and irrigation water source of the Central Anatolia Region. In the current study, the spatial distribution, effect on irrigation water quality, environmental pollution status, ecotoxicological and health risks as well as possible sources of 12 potential toxic elements?(PTEs)(manganese(Mn),aluminum(Al), arsenic(As), chromium(Cr), zinc(Zn), iron(Fe), nickel(Ni), cadmium(Cd), cobalt(Co),copper(Cu), mercury(Hg), and lead(Pb)) concentrations from surface water samples in the K?z?l?rmak River were analyzed by using geographical information systems(GIS) software, ecotoxicological indices,and multivariate statistical analysis. As a result of the current study, it was determined that the As concentration is above the World Health Organization(WHO) limit values, and, in terms of the 12 PTEs,there is slight heavy metal contamination in the river according to the Heavy Metal Pollution Index(HPI)and Heavy Metal Evaluation Index(HEI) values and there is a low level of pollution. The Hazard Quotient for ingestion(HQingestion) and Hazard Index(HI) values indicate that non-carcinogenic effects may *** to river water is likely to result in a low level of carcinogenic risk(CR) in adults, mainly due to the As concentration. The water at Sampling Station S3(131.79) cannot be used for drinking and is not suitable for consumption. According to the sodium percentage(Na%), Sodium Absorption Ratio(SAR),and Magnesium Hazard(MH) index results, river water is suitable for agricultural use.

关键词： Kızılırmak Water quality indexes Public health Arsenic pollution Multivariate statistical methods

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萨迦班智达与蒙古阔端王相关文献探析

西藏研究 2018年第2期 21-28页

作者：尕藏加中国社会科学院世界宗教研究所北京100732

萨迦班智达是萨迦派的代表人物,除在佛学方面有极高造诣之外,其对西藏地区划入中央政府直接管辖方面也作出了突出贡献,其中萨迦班智达与蒙古阔端王的会见以及他的"致蕃人书"在这一历史事件中起到了至关重要的作用。

关键词：元朝藏传佛教高僧文献

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猪微卫星标记多重PCR扩增组合

遗传 2004年第1期26卷 40-44页

作者：郭晓令徐宁迎 LOOFT Christian REINSCH Norbert kal M Ernst 浙江大学动物科学学院德国基尔大学畜牧兽医所基尔24098

采用多重PCR的方法,以快速扩增微卫星标记和节约试剂为目标,对其反应条件进行优化后,获得了46个扩增效果理想的微卫星标记多重PCR组合,其中30个为二重PCR,16个为三重PCR。实验结果表明,这些多重PCP反应的引物浓度为0.06～0.3μmol/L,Mg2... 详细信息

采用多重PCR的方法,以快速扩增微卫星标记和节约试剂为目标,对其反应条件进行优化后,获得了46个扩增效果理想的微卫星标记多重PCR组合,其中30个为二重PCR,16个为三重PCR。实验结果表明,这些多重PCP反应的引物浓度为0.06～0.3μmol/L,Mg2+的浓度变化范围为1.5～3.0mmol/L,采用的PCR缓冲液的倍数为1.0、1.2、1.4或1.6,每个PCR反应聚合酶的用量在0.2和0.4U之间,退火温度及反应循环数分别为52～60℃和32～50℃。所有多重PCR进一步合并为17个可在ABI337测序仪上进行电泳的组合。

关键词：猪微卫星标记多重PCR 扩增

Detonation nanodiamond and its applications:A case from China

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金刚石与磨料磨具工程 2008年第S1期28卷 44-49页

作者： Annie Hui~1,Wang Guangzu~2 (1.Carleton University,Canada kal Superabrasives Co.,Ltd,Canada) (2.Zhengzhou Research Institute for Abrasives and Grinding,Zhengzhou 450013,China)

Nanodiamond is a new material which has the dual properties of diamond and *** dual properties have contributed to its wide applications in many industrial *** paper briefly reviews the development of nanodiamond,describes its synthesis technology under dynamic high-temperature and high-pressure conditions,and introduces its properties as well as *** are made about nanodiamond’ s potentially successful applications in the future.

关键词： Explosion Detonation Nanodiamond

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过渡层堆焊对高碳当量服役管道的影响

金属加工（热加工） 2015年第10期 32-32,34页

作者： Morgan Dull kal Forest 加拿大红色火焰工业公司

本文在保持碳当量不变的情况下,研究了堆焊过渡层对服役管道的影响。研究表明,一种过渡层堆焊工艺能够显著地降低焊脚处的硬度。

关键词：堆焊工艺高碳当量过渡层管道服役

亚微米栅场效应晶体管中的非局部效应和扩散效应

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微纳电子技术 1987年第5期 38-42页

作者： A.A.kal’fa 刘宗穆

为了用计算机模拟亚微米肖特基势垒栅场效应晶体管,推导出一个准二维模型。该模型用准二维近似,以连续性方程、平均电子速度和能量恒定方程以及泊松方程的联立解为依据。提供了一种既能计算由晶体管沟道中不稳定电子动态特性而产生的非... 详细信息

为了用计算机模拟亚微米肖特基势垒栅场效应晶体管,推导出一个准二维模型。该模型用准二维近似,以连续性方程、平均电子速度和能量恒定方程以及泊松方程的联立解为依据。提供了一种既能计算由晶体管沟道中不稳定电子动态特性而产生的非局部效应又能计算由载流子扩散引起的扩散效应的方法。研究了非局部效应和扩散效应对沟道上电场分布、电子浓度、速度、能量以及对晶体管的静态特性和超高频方面的影响,并对这两效应进行了比较。

关键词：场效应晶体管单极晶体管场效应器件非局部效应方程式方程亚微米扩散效应