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TheauthorisamemberoftheNationalCommitteeoftheChinesePeople’sPoliticalConsultativeConference,PresidentoftheForeignAffair......
Since the permanent formation of our govern-ment underthe Constitution in 1789 ,most of the periods of crisis in our his......
随着城市里外来务工人口的增加,有关外来女工权益受到侵犯的案件时有发生,外来女工权益保护问题日益突显出来。这一现状引起政府有......
棉花卷叶病在印度和巴基斯坦造成的减产对国际棉花市场形成明显的冲击 ,国际棉花咨询委员会已立项对其进行研究。研究表明 ,卷叶病......
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PREPARATION OF POLYMER-SUPPORTED RCpCpTiCl_2 AND APPLICATION IN CATALYTIC ISOMERIZATION OF 1,5-HEXAD
Polymer-supported RCpCpTiCl2 (Cp =η5-C5H4; RCp = η5-RC5H4) have been prepared and reduced by i-C3H7MgBr in situ , the......
The oxidative dehydrogenation of ethane in wet natural gas toethylene over CdO-La_2O_3/Al_2O_3 catalyst in the presence......
Over Rh_4(CO)_(?z)-derived Rh/SiO_2 catalyst,atmospheric hydroformylation and hydro-genation of ethylene are suggested ......
近些年来,在日本的果树刊物上常提到葡萄无味果病和葡萄赤熟病。对这两种新的病害国内比较生疏。去年乘访日的机会,曾向日方葡萄......
柑桔脉突病毒(Citrus vein enation virus,CVEV)引起的柑桔脉突病是一种危险性柑桔病害。该病可侵染大多数柑桔种类,且对以粗柠檬......
An aromatization reaction was found when 18--methyl--estra--4(5),9(10)--dien--3, 17--dione(6) was treated with triethyl ......
Over Rh<sub>4</sub>（CO）<sub>?z</sub>-derived Rh/SiO<sub>2</sub> catalyst,atmospheric hydroformylation and hydro-genation o......
New methods for dehydrogenation of steroidal 2,5（10）-dienes with2,3-dichloro-5,6-dicyano-1,4-benzoquinone （DDQ） or pyridiniu......
A vacuum heating operation at 623 K on the surfaces of SiO<sub>2</sub>-supported promoted ca-talysts makes it possible t......
A NEW APPROACH TO THE SYNTHESES OF THE PHEROMONES OF JAPANESE BEETLE AND BONTEBOK WITH(Z)-VINYL CUPR
The dl-form of the sex pheromone of Japanese b(?)tle and the trail pheromone of Bontebok were synthesised in high purity......
