ccdA是ccd操纵子中的另一个基因，编码抗毒性蛋白 CcdA，保护细胞免受CcdB的毒性作用。 细胞因为丢失F质粒而丢失了ccdA基因，导致细胞屈服于CcdB的毒性。 F质粒的寄主致死体系主要由其基因组中控制致死功能的基因ccdA和ccdB负责。 在含该质粒的细胞中，CcdA蛋白作为解毒剂专门与毒剂CcdB蛋白结合，并使之失效。 在新产生的无质粒的子细胞中，开始的适合是含有CcdA和CcdB两种蛋白的。 但由于毒剂CcdB和解毒剂CcdA具有不同的稳定性，CcdA蛋白质不稳定， …

Education and Outreach Chair, CCDA III. Panel Introduction: • Peter Chiu – CID San Mateo Employee • Ben McMullan – CID San Mateo Employee • Ida Clair, FAIA – State Architect and Commissioner, CCDA • Erica Wood – President and CEO, San Mateo Area Chamber of Commerce IV. Panel Discussion: How Do We Remove Barriers and Achieve

Acetylated wood is a type of modified wood that is produced through a chemical modification process. [1] It produced from a chemical reaction (named as acetylation ), involving acetic anhydride and a modification process to make wood highly resistant to biological attacks by fungi and wood-boring insects and durable to environmental conditions.

2023年5月4日 · ccdB基因位于大肠杆菌 F性因子质粒 上，是 ccd操纵子 编码的毒素-抗毒素系统的一部分，负责细胞分裂过程中质粒的维持。 ccdB编码毒性蛋白 (CcdB)，它作为DNA旋转酶毒剂，与断裂的双链DNA一起锁住DNA旋转酶，最终导致细胞死亡。 ccd操纵子中发现的另一个基因ccdA，它编码的抗毒素蛋白 ( CcdA )保护细胞免受毒性CcdB的伤害。 缺失了F质粒而造成ccdA丢失的细胞，将会因CcdB的毒性而死亡。 大约20多年前，分子生物学家首次发现了该系统在提 …

Summarizes information on wood as an engineering material. Presents properties of wood and wood-based products of particular concern to the architect and engineer. Includes discussion of designing with wood and wood-based products along with some pertinent uses.

What is CCA-treated wood? If your residential wood structure was built before 2004 and is not made of cedar or redwood, it was most likely constructed with wood pressure-treated with Chromated Copper Arsenate (CCA). CCA is a chemical preservative comprised of arsenic, chromium, and copper.

中国社区发展协会（China Community Development Association，CCDA），成立于2013年8月，民政部为协会业务主管部门，是由全国从事社区建设和社区服务工作的企事业单位、依法登记的团体、城乡社区组织和个人自愿结成的全国性、非营利性社会组织，是我国社区建设领域 ...

Unlike a mostly homog-enous piece of polystyrene, MDF, or other man-made material, wood is an organic material, and has many distinct characteristics which will be helpful to learn. An immediate and broad distinction that can be made between types of trees (and wood) is the label of hard-wood or softwood.

评论家选择纪录片奖（Critics Choice Documentary Awards，简称CCDA）是由北美广播影评人协会和美国广播电视记者协会主办的影视类奖项，创办于2016年。 该奖项是欧美地区重要的纪录片类奖项之一，接受一个自然年度发行的纪录片作品报名。

The Hitchhiker's Guide to the Cataclysm is a guide to the zombie survival roguelike game Cataclysm: Dark Days Ahead. You can search for things in the game, like items (e.g. a flashlight), furniture (e.g. a table), or monsters (e.g. a zombie), and find useful information about them.