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? Chlormethyl α methyl β propiolactone(CMMPL)was synthesized by dehydrochlorination of dichloromethyl propionic acid(DCMPA)in the presence of DOH.The ring opening polymerization of CMMPL was successfully carried out by using Sn(Oct) 2,Ti(OBu) 4,Al(i OPr) 4 and Al(Et) 3 as initeators in bulk or solution.Powder X ray diffraction and DSC measurement showed that P(CMMPL) was a kind of high crystalline polymer. Both the polymerization conversion and the properties of the polymer were affected by the... ? Chlormethyl α methyl β propiolactone(CMMPL)was synthesized by dehydrochlorination of dichloromethyl propionic acid(DCMPA)in the presence of DOH.The ring opening polymerization of CMMPL was successfully carried out by using Sn(Oct) 2,Ti(OBu) 4,Al(i OPr) 4 and Al(Et) 3 as initeators in bulk or solution.Powder X ray diffraction and DSC measurement showed that P(CMMPL) was a kind of high crystalline polymer. Both the polymerization conversion and the properties of the polymer were affected by the monomer concentreation and the polymerization time. 可修饰的内酯,α-氯甲基-α-甲基-β-丙内酯的合成和聚合*王明霞李子臣贺晓晖杨丽**李福绵(北京大学化学系北京100871)关键词α-氯甲基-α-甲基-β-丙内酯,开环聚合*1995-02-20收稿;1996-03-12修回:自然科学基金课题;**... asing on the research of lichens of Xinjiang by him from 1985 to now,espe cially on the research supported by the National Natural Science Foundation from 1991 to 1994.and comparing with the research work about lichens of Xinjiang by other people,the author wrote this review.There were 6,000 specimens collected from 40 sites in Mountain Alati,Mountain Tianschan,and Mountain Kunnun etc of these specinmens.269 speecies have been identified,and among them,265 species belong to 85 genera,30 families,8 orders(Ascol... asing on the research of lichens of Xinjiang by him from 1985 to now,espe cially on the research supported by the National Natural Science Foundation from 1991 to 1994.and comparing with the research work about lichens of Xinjiang by other people,the author wrote this review.There were 6,000 specimens collected from 40 sites in Mountain Alati,Mountain Tianschan,and Mountain Kunnun etc of these specinmens.269 speecies have been identified,and among them,265 species belong to 85 genera,30 families,8 orders(Ascol ichen);4 ones belong to 4 genera(Lichen imperfect).The main,geographical distribution element of lichens of Xinjiang is holoarctie one,include Eurasian forest plant cubdisitrict.The catalog of lichens of Xinjiang(A total of 269 species,85 genera) is published in this paper. 本文根据作者1985年以来在新疆地衣的研究工作,特别是1991年申请到国家自然科学基金课题以后所作的研究工作的基础上,比较前人所做的工作而写出的回顾型论文。标本采集点共计40个,包括阿尔泰山、天山、昆仑山等山脉,共采集六千多号标本、经过处理鉴定初步定名地衣植物有269种,265种隶属于8目,30科,85属,另半知菌类4属,4种。新疆地区已定名地衣种,主要系泛北极植物区系成分,包括欧、亚森林植物亚区,亚洲荒漠植物亚区,青藏高原植物亚区等三个部分亚区。主要分析出新疆地衣地理分布类型,生态概况。本文附带已订名的新疆地衣269种85属的名录。 Jiuzhaigou, a national protection area of natur. and nature park, was apPOnted as Natural Heritage on the Earth by UnitedNatfons Environment Programm(UNEP) in 1993.In this area, ecologic environment is easy to fall into decay and lacks integral research.It also needs systematic specialistic maps. On the basis of the oresearches Of two projectssupPorted by National Natural scence FOundation, a series of specialistic mape bavebeen finished, which ended the history without systeretic specialiatic maps in the eara.This... Jiuzhaigou, a national protection area of natur. and nature park, was apPOnted as Natural Heritage on the Earth by UnitedNatfons Environment Programm(UNEP) in 1993.In this area, ecologic environment is easy to fall into decay and lacks integral research.It also needs systematic specialistic maps. On the basis of the oresearches Of two projectssupPorted by National Natural scence FOundation, a series of specialistic mape bavebeen finished, which ended the history without systeretic specialiatic maps in the eara.This Paper mainly intrduces the background,imghance, process, methods and characteristica Of the map-making. 九寨沟是国家级自然保护区和重点风景名胜区。并载入联合国的《世界自然造产名录》.该沟生态环境十分脆弱,科学研究程度还相当低.两个国家自然科学基金课题对基生态环境进行了综台系统的研究,在此基础上编制而成的专题系列图填补了该区没有一套较完整图件的空白.文章介绍了系列图的编制背景、意义、选题、方法及特点等内容.
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