The synthesis and biological properties of vinyl ester peptide-based molecules bearing linear N-terminal amino acids are reported. Compounds were tested in vitro for their capacity to inhibit the chymotryptic-, tryptic-like, and post-acidic activities of the proteasome. Some analogues showed selective...
摘要: 党史工作者必须具备的条件,是由党史工作的性质,特点决定的.历史,既是人类活动的记载和总结,也是人们继续前进的借鉴.我们共产党的历史,是无产阶级登上政治舞台后,领导人民群众奋斗谋幸福的历程的真实记载.民主革命时期,我们党领导人民为了解放生产力进行了英勇顽强的斗争,取得了伟大胜利.建国后,我们党又领导人民...
Meanwhile, diversified activities such as a Spring Festival bazaar and a lantern fair at the Oriental Pearl TV Tower, loong- or dragon-themed activities at Oriental Land, ocean-and-loong-themed events at Shanghai Haichang Ocean Park, and ...
AS(SAN) 日本大赛璐 Cevian®-N NF012A 规格用途 AS(SAN) 日本大赛璐 Cevian®-N NF012A 技术参数 性能项目 试验条件[状态] 测试方法 测试数据 密度 ISO1183 1.11 g/cm3 熔流率(熔体流动速率)(220°C/10.0kg) ISO1133 60 g/10min 收缩率-流动 ASTMD955 0.30到0.50 % 吸水率(23°C,24hr) ISO...
The diffuser has one end fixed at the outside of the air bag housing and bent along the shape of the inner surface of the air bag housing and the other end connected to the cover plate so as to move the cover plate in a ... 최형호 被引量: 0发表: 2006年 Device for Cleaning...
记者从中国航空工业集团有限公司获悉,近日,由航空工业自主研制的“祥云”AS700载人飞艇从湖北荆门漳河机场腾空,经1小时46分钟飞行平稳降落在荆州沙市通用机场,经过短暂休整后返回荆门,成功完成首次转场飞行。 China's independently-developed AS700 civil manned a...
摘要: 本文主要介绍了GPS短基线基本模型和GPS动态定位的数据处理方法.关键词:GPS 短基线模型 动态定位 DOI: CNKI:SUN:CHXB.0.2000-03-016 年份: 2000 收藏 引用 批量引用 报错 分享 全部来源 求助全文 国家科技图书文献中心 (权威机构) 万方 维普期刊专业版 掌桥科研 kns.cnki.net ...
解答 解:(1)P元素原子价电子排布式为3s22p3,基态原子有3个未成对电子,N4分子与P4结构相似,为正四面体构型,N4分子中N原子形成3个σ键、含有1对孤对电子,杂化轨道数目为4,N原子采取sp3杂化,每个面为正三角形,N-N 键的键角为60°;N4分解后能产生N2并释放出大量能量,可以制造火箭推进剂或炸药,...
He was in a(n) ___ shirt, looking pale and about eleven. As soon as I began to speak, he opened the___ in his hand and took out the tools of shoe-polishing(擦鞋). He bent down, ___ my leather shoes, and began to shine them. He was busy doing his work ___ heavy rain b...
C.As>P>H D.Cl>S>As 试题答案 在线课程 【答案】D 【解析】A.同周期主族元素从左到右,元素的电负性逐渐增大,则电负性F>O>N,故A不符合题意; B.同周期主族元素从左到右,元素的电负性逐渐增大,同主族元素从上到下,元素的电负性逐渐变小,则电负性F>O>Cl,故B不符合题意; ...