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钠(Sodium)是一种化学元素,它的化学符号是Na,它的原子序数是11。钠单质不会在地球自然界中存在,因为钠在空气中会迅速氧化,并与水产生剧烈反应,所以只能存在于化合物中。
先加SO2然后变成NaHSO3,然后蒸干灼烧就变成了Na2SO4
你没有说清楚是什么呀。 钢筋中不知道怎么处理的钢筋可以直接在单构件输入中计算的。
Na-K泵 存在于动、植物细胞质膜上,它有大小两个亚基,大亚基催化ATP水解,小亚基是一个糖蛋白。大亚基以亲Na+态结合Na+后,触发水解ATP。每水解一个ATP释放的能量输送3个Na+到胞外,同时摄...
RDS-DIN1-NA-D1中文资料
Proximity Sensors DIN Rail Mountable Single Channel Interface Module RDS-DIN1 Series HONEYWELL Sensing and Control FEATURES ? DIN Rail mountable for ease of installation in equipment bungalows ? Built in test switch ? Available in current sink or current source, with or without time delay ? Sealed to IP67, NEMA 6P ? Short circuit protection ? Surge immunity ? Reverse polarity protection ? Radiate
na新旧路基搭接施工方案
- 1 - 湘潭九华示范区湘江流域防洪、道 路、景观工程 K2+800-K5+700路段 新 旧 路 基 搭 接 专 项 施 工 方 案 编制单位: 湖南高岭建设集团股份有限公司 编 制 人: 审 核 人: 审 批 人: - 2 - 编制日期: 二○一二年 七 月 目 录 一、编制依据及原则 ............................................................... - 3 - (一)编制依据 .............................................................................. - 3 - (二)编制原则 .............................................................................. -
《新古典室内设计Architecture & Design》是一本图书,作者是Not Available (NA)
内容简介
Interior architect Esther Gutmer lived in the United States from 1980 to 1986, where she fell in love with the concept that Ralph Lauren had introduced with his "Home Collection': living as an art,with fully furnished interiors revealing the designer's inspiration and sense of per-fection. Upon her return to Europe, Esther Gutmer decided to transfer this home-design culture to ...(展开全部) Interior architect Esther Gutmer lived in the United States from 1980 to 1986, where she fell in love with the concept that Ralph Lauren had introduced with his "Home Collection': living as an art,with fully furnished interiors revealing the designer's inspiration and sense of per-fection. Upon her return to Europe, Esther Gutmer decided to transfer this home-design culture to the country of her birth. Over two decades later, Esther Gutmer's studio, which now has ten employees, ar-chitects and interior designers, has grown to become a point of reference in the field of contemporary classic interiors. She has created and coordinated many exclusive private interiors, and also has a variety of retail projects to her name.2100433B
1. 该轴承为实体滚针轴承
2. 轴承带内圈,不带内圈为NA4910
3. 轴承不带密封,若单侧密封,为NA4910-RS,
若两侧密封,为NA4910-2RS
4. 两侧密封不带内圈,为RNA4910-2RS
5. 原有型号:4544910
Na-K泵 存在于动、植物细胞质膜上,它有大小两个亚基,大亚基催化ATP水解,小亚基是一个糖蛋白。大亚基以亲Na 态结合Na 后,触发水解ATP。每水解一个ATP释放的能量输送3个Na 到胞外,同时摄取2个K 入胞,造成跨膜梯度和电位差,这对神经冲动传导尤其重要,Na -K 泵造成的膜电位差约占整个神经膜电压的80%。若将纯化的Na -K 泵装配在红细胞膜囊泡(血影)上,人为地增大膜两边的Na 、K 梯度到一定程度,当梯度所持有的能量大于ATP水解的化学能时,Na 、K 会反向顺浓差流过Na -K 泵,同时合成ATP。这种可逆现象是离子泵的普遍性质。