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Synthesis and Structural Characterization of Co(Ⅱ) Coordination Polymer [Co(-phth)(imi_)2._n

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chinese Journal of Structural Chemistry 2003年第3期22卷 313-317页

作者： chen Yun {1. Ping② {1. qing-Yan WANG Jian chenG Wen-Dan (Fujian institute of Research on the Structure of Matter, The chinese academy of sciences, Fuzhou, Fujian 350002. china) Fujian institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A new cobalt(Ⅱ) complex [Co(-phth)(imi)2.n (phth = o-phthalato, imi = imidazole) has been synthesized by the reaction of CoCl2.with disodium o-phthalate and imidazole. The crystal structure of the compound has been determined by single-crystal X-ray diffraction. The crystal is of monoclinic system, space group Pn with a = 8.405(1., b = 9.995(1., c = 9.996(2. ? b = 1.4.479(2., V = 81..0(2. ?, Dc = 1.467 g/cm3, C1.H1.0}4O4Co, Mr = 359.2., F(000) = 366, m = 1.079 mm-1. Z = 2. R = 0.0483 and wR = 0.1.0}9 for 1.83 observed reflections (I > 2.(I)). In the title complex, the Co(Ⅱ) ions are bridged by o-phthalate ligands in a bidentate mode, producing a zigzag infinite chain structure. Each four-coordinated cobalt(Ⅱ) center was coordinated by two oxygen atoms and two nitrogen atoms to give a distorted tetrahedral geometry. The chains are linked by hydrogen bonds between oxygen atoms belonging to carboxylate groups and hydrogen atoms of imidazole molecules, forming an unusual two-dimensional coordination polymer.

关键词： cobalt(Ⅱ) complex o-phthalate complex synthesis crystal structure coordination polymer

Effect of Heavy Metal-containing Substrates on the Yield and Quality of Pleurotus eryngii Fruit Bodies

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食用菌学报 2006年第2期 57-60页

作者： QU Ming-qing~ 1, 3 , XING Zeng-tao~ 1* , chen Ji-hong~ 2., LI Ming-rong~ 1 , MEN Dian-ying~ 1 , WANG Nan~ 2., TAN Qi~ 2., XIE Wen-ming~ 3 ~ 1 {2. for Agri-food Standards and Testing Technology ~ 2.{2. of Edible Fungi, Shanghai academy of Agricultural sciences, Shanghai 2.1106, china ~ 3 College of Resource and Environment, Jilin Agricultural University, Changchun, Jilin 130118, china

Under conditions adopted for commercial mushroom cultivation, concentrations of As, Hg, Pb and Cd in Pleurotus eryngii fruit bodies increased with increasing heavy metal supplementation of the cultivation substrate. Average growth yields and biological efficiencies also decreased with increasing As, Hg and Cd supplementation, whereas increases in both parameters were observed with increased Pb supplementation. Based on the heavy metal concentration limits for dry edible fungi specified in GB 7096-2.03~ [1. and NY/T 749-2.03~ [2. , our data suggest that As, Hg, Pb and Cd concentrations in substrates used for cultivating P. eryngii should be less than 0.5, 1.0, 3.5 and 1.0 mg/kg, respectively.

关键词： Biological enrichment Heavy metal Pleurotus eryngii Safety limit value

Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments

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Rare Metals 2024年第10期43卷 5229-5241页

作者： Hua-Zhou Hu Hou-Qun Xiao Xin-Cong He Wen-Hao Zhou Xiao-Xuan Zhang Rui-Zhu Tang Jie Li Chuan-Ming Ma qing-Jun {1. Key Laboratory of Rare Earths Chinese Academy of SciencesJiangxi Institute of Rare EarthsGanjiang Innovation AcademyChinese Academy of Sciences

The V-based body-centered cubic （BCC）-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of3.80 wt%.However,their practical application faces challenges related to low dehydriding capacity and poor activation *** overcome these challenges,a BCC-type Ti–V–Cr–Mn–Mo–Ce high-entropy alloy（HEA） with an effectively dehydriding capacity of 2.5 wt% above 0.1.MPa was *** introduction of Mo and conducting heat treatment,the precipitation of Ti-rich phase in HEA was successfully suppressed,resulting in improved compositional uniformity and dehydriding ***,the effective dehydriding capacity increased significantly from 0.60 wt% to 2.50 wt% a65℃,surpassing that of other types of hydrogen storage alloys under the same ***,the addition of 1.wt%Ce enabled initial hydrogen absorption at 2.℃ without the need for activation at 400℃.Furthermore,Ce doping reduced the dehydriding activation energy of the Ti–V–Cr–Mn–Mo–Ce HEA from 52.71.to 42.82.kJ·mol-1.dditionally,the enthalpy value of dehydrogenation decreased from 46.89 to 1..96 k J·mol-1.attributed to a decrease in the hysteresis factor from 0.68 to *** findings provide valuable insights for optimizing the hydrogen storage property of HEA.

关键词： BCC structure Ce doping Heat treatment High-entropy alloys Hydrogen storage alloys

非线性系统的任意项精细积分外插多步法及其在混沌数值分析中的应用

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物理学报 2003年第5期52卷 1091-1095页

作者：唐晨张皞闫海青张桂敏天津大学应用物理系

对非线性系统提出了高精度的精细积分任意项外插多步法的计算公式 .本方法只需增加插值项数即可提高计算精度 ,同时不会增加过大的计算量 ,发展完善了精细积分法 .将本方法应用于混沌方程中 ,取得了较好的效果 .数值计算结果表明 ,该方... 详细信息

对非线性系统提出了高精度的精细积分任意项外插多步法的计算公式 .本方法只需增加插值项数即可提高计算精度 ,同时不会增加过大的计算量 ,发展完善了精细积分法 .将本方法应用于混沌方程中 ,取得了较好的效果 .数值计算结果表明 ,该方法是一种高精度、高效率的方法。

关键词：非线性系统任意项精细积分外插多步法混沌系统混沌吸引子混沌方程数值计算

Effects of Water and Nitrogen Supplyon Spinach（Spinacia oleracea L．）Growth and SoilMineral Residues

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Pedosphere 2002年第2期12卷 171-178页

作者： chen{1. H.P.LIEBIG 等 DepartmentofPlantNutrition ChinaAgriculturalUniversityBeijing100094（China） instituteforFruitScience VegetableScienceandViticultureHohenheimUniversityD－70593Stuttgart（Germany）

Effets of conventional and optimized water and nitrogenmanagements on spinach (Spinacia oleracea L.) growth and soil mineralN (N_min) residues were compared in an open field experiment in whichwater balance method and N recommendation with the KNS-system wereincluded. It was shown that the conventional water treatment(seasonal irrigated amount: 1.5 mm) reduced spinach growth comparedto the water balance treatments (seasonal irrigated amount: 80 and 85mm) at he same N supply level due to N loss through leaching causedby excessive water supply.

关键词： N_min residue spinach water and nitrogen recommendation

透明颤菌血红蛋白基因vgb和腈水解酶基因bxn在毕赤酵母中的表达研究

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生物工程学报 2004年第5期20卷 730-735页

作者：王清路张锐倪万潮陈毓荃郭三堆江苏省农业科学院遗传生理研究所南京210014 西北农林科技大学生命科学学院杨凌712100 中国农业科学院生物技术研究所北京100081

为获得高效表达外源蛋白的Pichiapastoris菌株而设计了重组质粒pPIC9K_vgbbxn ,其中透明颤菌血红蛋白基因vgb胞内表达以提高菌体的发酵密度 ,腈水解酶基因bxn分泌表达。转化GS1.5菌株后 ,通过PCR、SDS_PAGE检测证实两基因已经整合进酵... 详细信息

为获得高效表达外源蛋白的Pichiapastoris菌株而设计了重组质粒pPIC9K_vgbbxn ,其中透明颤菌血红蛋白基因vgb胞内表达以提高菌体的发酵密度 ,腈水解酶基因bxn分泌表达。转化GS1.5菌株后 ,通过PCR、SDS_PAGE检测证实两基因已经整合进酵母基因组且能高效表达 ,以及用准确的蛋白活性测定方法成功地检测到二者所表达的产物均具有正常的活性。摇瓶发酵实验证明。

关键词：毕赤酵母分泌型表达载体腈水解酶透明颤菌血红蛋白

Analysis of two constitutive forms of microsomal heme oxygenase in different rat tissues

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World Journal of Gastroenterology 1997年第4期3卷 12-14页

作者： XIA ZhenWei1. LI YunZhu1. chen ShunNian1. SHEN {1.Xiang2. BEN XiaoMing1.and YU ShanChang1. Zhen-Wei Xia Yun-Zhu Li Shun-Nian Chen Xiao- Ming Ben Shan-Chang Yu Department of Pediatrics Ruijin Hospital Shanghai Second Medical University Shanghai 200025 China qing-Xiang Shen Shanghai Institute of Cell Biology Academia Sinica Shanghai 200031 China Zhen-Wei Xia male born in 1963 graduated from Shanghai 2[nd] Medical University with MD of pediatrics now attending doctor.Author contributions: All authors contributed equally to the work.Correspondence to: Zhen-Wei Xia MD Department of Pediatrics Ruijin Hospital Shanghai Second Medical University Shanghai 200025 China

IM To isolate and purify the heme oxygenase (HO) isoform microsomal fractions in SpragueDawley rat liver and brain in order to understand the characteristics of the two constitutive forms and the mechanism of the occurrence of hyperbilirubinemia.METHODS After induced by hematin and phenylhydrazine, the rat liver and brain microsomal fractions were isolated and purified by DEAESephacel and hydroxylapatite. The activity of two isoforms and the apparent molecular weight of heme oxygenase1.(HO1. and heme oxygenase2.(HO2. on SDSpolyacrylamide gel electrophoresis (SDSPAGE) were measured. Kunming mice were used to prepare antiserum against purified liver HO2. Rat liver HO1.and brain HO2.preparations were analysed with Western immunoblotting technique.RESULTS Two isoforms were purified and identified in the treated rat liver, and HO1.was the predominant form with a ratio of 2.1. In the native state, the HO2.activity was detected, but the HO1.activity was increased in response to hematin and phenylhydrazine, and that of HO2.was fully refractory to these agents. The apparent molecular weights of HO1.and HO2.were about Mr 30 000 and Mr 36 000 under reducing conditions, respectively. In the untreated liver and treated brain, only one peak of HO activity exhibiting an elution profile similar to that of HO2.of the treated liver was detected. The presence of an activity peak was not found in the elution profile at the region where the inducible isoform of HO (HO1. was expected. The apparent molecular weight in treated brain preparation was identical to that of the purified liver HO2. Crossreactivity of HO2.in the brain microsomal preparation was established; but a reactivity of HO1.in the liver was not observed by Western immunoblotting analysis when antiserum to liver HO2.was employed.CONCLUSION Two constitutive forms of HO, designated as HO1.and HO2. exist in the treated rat liver. HO1.is an inducible enzyme. In the treated rat brain only H

关键词： Heme oxygenase liver brain hyperbilirubinemia

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修正的低渗透气藏产能方程

天然气工业 2009年第4期29卷 68-70页

作者：杨凯郭肖肖喜庆陈智西南石油大学中国石油西南油气田公司采气工程研究院

在低渗透气藏开发过程中,由于启动压力梯度、应力敏感的存在,使得气体的渗流不符合经典的达西定律。在考虑启动压力梯度、应力敏感和滑脱效应的综合影响基础上,对气体的流速方程进行了修正,并结合渗流力学基本原理得到修正的低渗透气井... 详细信息

在低渗透气藏开发过程中,由于启动压力梯度、应力敏感的存在,使得气体的渗流不符合经典的达西定律。在考虑启动压力梯度、应力敏感和滑脱效应的综合影响基础上,对气体的流速方程进行了修正,并结合渗流力学基本原理得到修正的低渗透气井产能方程。应用修正产能公式对某气田的实际数据进行了计算,得到如下结论:应力敏感的存在将使气井的产能大幅度下降,最大可下降1.%;启动压力梯度的存在将使气井的产能下降,不过下降幅度较小;由于气体黏度远小于油,故低渗透气井中应力敏感对产能的影响比启动压力梯度的影响要大;黏度越大启动压力梯度对产能的影响越大。建议低渗透气藏开发中必须充分考虑应力敏感的影响。

关键词：低渗透油气藏启动压力应力生产能力方程

THE COMPARISON OF POSTEMERGENCE HERBICIDES SIGMABROAD 3.6%WG,SIGMABROAD OD1.0}/L AND SIGMA OF 30G/L ON CONTROL EFFICACY OF GRAMINEAE AND THE BROAD-LEAF WEED AND WINTER WHEAT SAFETY

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THE COMPARISON OF POSTEMERGENCE HERBICIDES SIGMABROAD 3.6%WG...