【摘 要】
：
Isotactic polypropylene (iPP) has complex polymorphic structures. It can crystallize in at least four different modifications, termed α, β, γ and δ, under
【出 处】
：
Chinese Science Bulletin
论文部分内容阅读
Isotactic polypropylene (iPP) has complex polymorphic structures. It can crystallize in at least four different modifications, termed α, β, γ and δ, under different crystallization conditions. The modifications of iPP and their transitions have attracted much attention over the years. Studies on the relationships between the modifications and the possibility of formation of new modification are significantly important to investigation on the relationships between structure and properties of iPP. In this note, the
It can crystallize in at least four different modifications, termed α, β, γ and δ, under different crystallization conditions. The modifications of iPP and their transitions have gathered more attention over the years. on the relationships between the modifications and the possibility of formation of new modification are significant important to investigation on the relationships between structure and properties of iPP. In this note, the
其他文献
一、机油的检查检查机油时，应把车辆停放在平坦地面上，否则会因车辆的倾斜造成机油尺的读数误差，最好的检查时机是在行车前未发动时，因为此刻机油全在油底壳内。若是热车检查机油
从国家发展计划委员会获悉,西部大开发若干政策实施意见及细则将颁布实行。内容包括: ——增加建设资金投入。要提高中央基本建设投资资金、长期建设国债资金用于西部地区的
Cytochrome c is a kind of electron transfer carrier in the living organisms. In recent years, many electrochemists have been interested in its electrochemical
随着社会经济的飞速发展和中国加入WTO,私人购车已不再是为了单纯的代步,而随之兴起的汽车改装也逐渐成为新新人类的一种时尚、一种展示自我、释放自我的方式。在北京谈起汽
在 Ｎｕｃｌｅｏｓｉｌ Ｃ１８柱（５μｍ，２５０×４．６ ｍｍ）上，研究了 Ｐｔ（Ⅱ）－４，５－二溴苯基荧光酮螯 合物分离和检测的最宜的流动相组成。用含０．０１ ｍｏｌ／Ｌ的ＨＡｃ－ＮａＡｃ（ｐＨ ５．０）的乙腈－水 （７０：３０，Ｖ／Ｖ）作流动相，流速为 ０．４ ｍＬ／ｍｉｎ，于 ５４０ｎｍ处检测。测定铂的校准线的浓度范 围是０．０３～０．３×１０－６ｇ／ｍＬ；检测限为０．０２０ｎｇ。方
罗孚是英国一个历史悠久的汽车厂牌,从1904年至今,这种厂牌的汽车在世上已驰骋了91个年头。不过公司的发展却是曲折拐弯,几经沧桑。60年代,它和杰戈娃、奥斯汀、莫利斯等公
【摘 要】因良好的发光效率和节能特性，LED节能灯已逐渐在家庭和工业照明中开始普及。本文将探讨如何在保证照明质量的前提下，通过合适的材料选取和电路设计，使制造出来的LED节能灯具工作更高效、节能、环保。 【关键词】LED节能灯；材料；设计；电子镇流器 【中图分类号】TM923.3 【文献标识码】A 【文章编号】1672-5158（2013）03-0063-01 1 LED节能灯电子镇流器的设
《肉品卫生》杂志原主编、名誉主编、首席顾问、中国畜牧兽医学会兽医食品卫生学分会名誉理事长、教授级高级兽医师赵鸿森同志的逝世,使我一直感到很悲痛。我是曾经受到赵教
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
目的:探讨与研究珍宝丸对新生乳鼠脑缺氧保护作用的机制。方法:取新生Wistar乳鼠120只,雌雄不限,随机分为对照组、模型组和珍宝丸治疗组各40只。将新生Wistar大鼠置于8%O2+92