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一种南海海绵(Acanthella sp.)的化学成分研究

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天然产物研究与开发 2003年第3期15卷 199-202页

作者：严小红宋国强周秀红刘松柏郭跃伟中国科学院上海生命科学研究院药物研究所国家新药研究重点实验室上海200031

从中国南海海绵 (Acanthellasp .)中分离得到了 11个有机化合物。应用现代波谱技术和X 衍射分析 ,确定其结构分别为 (+) α amuurolene(Ⅰ ) ,(1R ,6S ,7S ,10S) 10 isothiocyanato 4 amorphene(Ⅱ ) ,acantheneB(Ⅲ ) ,isothiocyan... 详细信息

从中国南海海绵 (Acanthellasp .)中分离得到了 11个有机化合物。应用现代波谱技术和X 衍射分析 ,确定其结构分别为 (+) α amuurolene(Ⅰ ) ,(1R ,6S ,7S ,10S) 10 isothiocyanato 4 amorphene(Ⅱ ) ,acantheneB(Ⅲ ) ,isothiocyanate 1(Ⅳ ) ,(+) 10 (R) isothiocyanatoalloaromadendrane(Ⅴ ) ,axisonitrile 3(Ⅵ ) ,kalihinene(Ⅶ ) ,kalihiolA(Ⅷ ) ,胆甾醇 (Ⅸ ) ,麦角甾醇 (Ⅹ )和麦角甾 6 ,2.2. 二烯 5 ,8 环二氧 3 醇(Ⅺ )。其中化合物Ⅱ Ⅷ是首次从中国海洋生物中分离得到的异腈萜类化合物。

关键词：南海海绵化学成分异腈萜类化合物海洋生物胆甾醇麦角甾醇

Localization of orexins and their receptors in rat retina

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Localization of orexins and their receptors in rat retina

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： guo-Zhong XU~(1,2.,Lu WANg~1,Jian TIAN~2.Yong-Mei ZHONg~(1,*),Xiong-Li YANg~1 1 institute of Neurobiology,institutes of Brain Science and {2. key laboratory of Medical Neurobiology,Fudan University,Shanghai 2.0032.china 2.School of Bioscience and Biotechnology,Changchun University of Science and Technology,Changchun 13002., china

＜正＞Orexin A and orexin B are two neuropeptides that are involved in the control of a variety of circadian physiological processes via two subtypes of specific g-protein coupled receptors（OX1R and OX2.）.Whilst most of mammalian circadian activities are regulated by photoentrainment,derived from some retinal neurons,data regarding if the orexin system may be present in the retina are very *** the present study,localization of orexins and their receptors in rat retina was examined using immunofluorescence double *** transcription-polymerase chain reactive analysis （RT-PCR） demonstrated that the mRNA of orexin A and B,as well as OX1R was present in rat *** immunolabeling for orexin A was clearly observed in some cells that are located in the proximal part of the inner nuclear layer（INL） and in the ganglion cell layer（gCL）.The inner plexiform layer（IPL） was also weakly *** labeling profile for orexin B was basically similar to that for orexin A,but lots of cells at different levels of the INL were *** the other hand,OX1R immunoreactivity was present in the outer plexform layer and the *** contrast,no labeling for OX2. was detected in rat *** using cholera toxin B to label gCs retrogradely further demonstrated that orexin A,orexin B and OX 1R were all co-localized in some of the *** results raise a possibility that orexins,when released from inner retinal neurons, may modulate activities of gCs via OX1R,and thus may be involved in circadian rhythm entrainment.

关键词： orexin orexin receptor retina immunofluorescence double labeling

Research on the relationship between site function and environment at the site of Zhongba,Chongqing City,china

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chinese Science Bulletin 2008年第S1期53卷 58-73页

作者： SUN ZhiBin institute of Cultural Relics and Archaeology of Sichuan Province,Chengdu 610041,china institute of Cultural Relics and Archaeology of Sichuan Province Chengdu China

The Zhongba site has been demonstrated to be a location of salt production based on multi-disciplinary research including salt archaeology,environmental archaeology,zooarchaeology,paleobotany,and other natural science *** continuity of salt production from the Han Dynasty to the present day as understood primarily from ancient texts can now be traced back to even earlier times. Based on the characteristics of cultural layer deposits,features,and artifacts,Zhongba can be clearly distinguished from known settlements,and from bronze,iron,pottery and porcelain *** to various natural science examinations,the major impurities in local salt brine are also found in floor features,brine troughs,and rounded bottom pots at the site even though NaCl itself was not *** traces were left over from the salt production process rather than being naturally *** and its constituent features and artifacts share many common characters with other salt production sites around the ***,the Zhongba site can be confidently identified as a salt production site where activity continued for several thousand *** formation of the site cannot be separated from salt production,and it is also highly related to its natural environment.

关键词： Zhongba site function salt production environmental relationships

Studies on the Alkylation Reaction of Isobutane with Butene

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Studies on the Alkylation Reaction of Isobutane with Butene

7th World Congress on Recovery, Recycling and Re-integration

作者： Lili Yang, Suojiang Zhang, Zengxi Li, Xiangping Zhang, Haijian Pang institute of Process Engineering, chinese academy of sciences, 1 Beiertiao, Zhongguancun, Beijing 100080,{2. Xinqian Shu{2. University of Mining and Technology, Beijing 100083,{2.

Alkylation of isobutane with butene is one of the important processes in chemical industry and it is also of considerable importance for the production of high-octane gasoline. Due to the strong Lewis acidity of the anions of Al2.l7-, acidic chloroaluminate ionic liquid shows high catalytic activity in many chemical reactions including Diels-Alder and Friedel-Crafts reactions. In this work, the alkylation experiments were carried out in a stirred pressure autoclave, and the gas and liquid products were analyzed by gas chromatography. The properties of ionic liquids and the effects of operating variables were investigated and optimized, the implications of the most important process parameters on the alkylation performance were discussed, and the improvement of product distribution with high yields of C8 and selectivity of TMP under a mild reaction condition was observed. Under the optimized operation conditions, the catalytic performance of the ionic liquid was comparable with that of sulfuric acid.

关键词： alkylation, catalyst, ionic liquid, isobutane, butene

Research on the Deformation of Anti-seepage System Considering Fluid-Solid Coupling

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Research on the Deformation of Anti-seepage System Consideri...

第十届全国渗流力学学术会议暨2.09渗流力学及应用国际论坛

作者： ZHOU Xiaojun,XUE Qiang .institutes of Porous Mechanics,Wuhan Polytechnic University,Hubei Wuhan,43002.,china .institute of Porous Mechanics,Wuhan Polytechnic University,Hubei Wuhan,43002.,china .institute of Rock and Soil Mechanics,chinese academy of sciences,Hubei Wuhan,430071,china

Based on the fluid mechanics in porous medium and the theory of fluid-solid coupling,a fluid-solid coupling mathematical model of deformation problem of anti-seepage system in landfill has been established,and the deformation features with water and leachte head in garbage dump layer decreased has been *** show that with the water head decreased,the pore pressure is progressively lowered,which makes virtual stress ***,the displacement of anti-seepage system *** the water pumping capacity in certain situation,the increasing of time will lead to the displacement increase at the same one-point position,the increasing of distance will lead to the displacement decrease at different-point *** layer should be adapted to the uneven settlement caused by the rot and displacement of the *** not only provides a reliable theoretical basis for increasing the landfill capacity,but also gives reference to the stability and protection of the landfill.

关键词： landfill anti-seepage porous medium fluid-solid coupling deformation laws

Preliminary Evaluation of Rice germplasm Resistance to the Rice Stripe Disease

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Preliminary Evaluation of Rice Germplasm Resistance to the R...

中国植物病理学会2.07年学术年会

作者： Hua-Di Wang~1 Xiang-Liang Sun~2.Zeng-Rong Zhu~3 guo-Chang Sun~4 1.Zhejiang Bureau of Plant Protection and Quarantine,Hangzhou 31002. 2.Jiaxing academy of Agricultural sciences,Jiaxing,Zhejiang,314000 3.{2. state laboratory of Rice Biology,and Department of Plant Protection,Zhejiang University,Hangzhou 31002. 4.Zhejiang academy of Agricultural sciences,Hangzhou 31002.

＜正＞Rice stripe viral（RSV）disease is a severe destructive disease in North-East Asian rice production countries. The disease is transmitted by the rice small brown planthopper Laodelphax striatellus Fallen（Homoptera: Delphacidae）.Once the rice plants are infected by the virus,they are normally not easily to be ***,

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低碳烃在ga/HZSM-5型催化剂上转化为芳烃的研究Ⅱ不同金属改性的ga/HZSM-5催化剂

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燃料化学学报 1999年第S1期27卷 71-74页

作者：朱华青翟效珍刘盛楹高志贤王建国中国科学院山西煤炭化学研究所煤转化国家重点实验室太原030001

采用Zn、Ni、Ag第二组分浸渍改性ga/HZSM-5催化剂,并对其正己烷芳构化过程进行了研究。Ni作为第二组分使催化剂失活速度加快,而Zn、Ag的加入改善了催化剂的稳定性。Ag既有抑制与裂解活性和氢转移活性相关的酸性中心的作用,也有促进催化... 详细信息

采用Zn、Ni、Ag第二组分浸渍改性ga/HZSM-5催化剂,并对其正己烷芳构化过程进行了研究。Ni作为第二组分使催化剂失活速度加快,而Zn、Ag的加入改善了催化剂的稳定性。Ag既有抑制与裂解活性和氢转移活性相关的酸性中心的作用,也有促进催化剂脱氢芳构化活性的作用,合适的Ag含量为05%。对gaAgZ(05)上催化重整抽余油芳构化过程的研究也表明Ag促进了催化剂的脱氢芳构化能力,提高了芳烃选择性。gaAgZ(05)在550℃,WHSV=05h-1下,以试剂正己烷为原料时,80h平均液体收率6963%,芳烃收率684%,氢产率47%,燃料气2.67%;以催化重整抽余油为原料时,70h平均液体产品收率641%,芳烃收率为557%,H2.9%,燃料气330%。

关键词：正己烷重整抽余油 ga/HZSM-5 浸渍改性芳构化

Study on signal denoising of ground penetrating radar based on intelligent wavelet transform

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Study on signal denoising of ground penetrating radar based ...

The 4th International Conference on environmental and Engineering geophysics

作者： guoqing Chen~1 guoshao Su~2.Zhanfeng Fan~1 Zhiheng Lin~2.Zhifa Zeng~1 1.state key {2. of geohazard Prevention and geoenvironment Protection Chengdu University of Technology Chengdu 610059 china 2.College of Architecture and Civil Engineering guangxi University Nanning 530004 china

＜正＞Because radar wave is disturbed seriously by voices and clutters on the condition of complicated geological conditions,conventional filtering signal processing methods are difficult to meet the need for an accurate de-noising signal image *** the wavelet transformation theory and intelligent optimization algorithm,the intelligent reducing noise method of particle swarm optimization（PSO）-wavelet threshold was proposed,which has the ability of dealing with the problem of signal noise accurately and *** threshold of coefficients of wavelet at different levels was searched by using PSO algorithm in the global scope;the intelligent optimization process of reducing the noise of ground penetrating radar signal was founded. Through the engineering practice of ground penetrating radar using in the advanced prediction of tunnel geological hazards,the result shows that the interference factors in the signals can be removed quickly on the basis of the de-noising method of intelligence wavelet *** paves a new way for realizing the fast and exact prediction of tunnel geological hazards.

关键词： geohazard Forecast ground Penetrating Radar Wavelet Denoising Intelligent Optimization

BLEACHINg OF SULFONATED CMP FROM BIO-TREATED WHEAT STRAW

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天津科技大学学报 2004年第A2期19卷 299-304页

作者： HongYu MenghuaQin XuemeiLu YinboQu Peijigao FacultyofLightChemistryandenvironmentalEngineering ShandongInstituteofLightIndustry250100 statekey{2.ofMicrobialTechnology ShandongUniversity250100

Wheat straw chemi-mechanical pulp was pretreated with a crude xylanase which was secreted by white rot fungus Phanerochaete Chrysosporium prior to hydrogen peroxide bleaching. The process of xylanase pretreatment and hydrogen peroxide bleaching was optimized. The xylanase treated pulp achieved a brightness gain of 5.8% ISO over the untreated pulp. The xylanase treatment was found to liberate reducing sugars and facilitating lignin removal. Fiber morphology of pulp treated with xylanase was also studied by SEM.

关键词：小麦秸杆生物漂白过氧化氢木聚糖酶纸浆材料