MDI的性质、毒性和安全知识 1. 产品分类和暴露极限 CAS NO. OSHA PEL 1 ACGIH TLV2 4,4’-二苯基甲烷二异氰酸酯(MDI) 101-68-8 0.02ppm(ceiling) 0.005ppm(8-hour TWA3 聚合MDI 9016-87-9 1、可允许的暴露限制 2、最大允许浓度 3、加权平均数 2、典型物理数据 4,4’MDI PMDI 外观 固体,38℃以下...
International applicants are eligible to apply . Be currently enrolled full-time in an accredited public or private college or university in the United States or its territories, as recognized by the U.S. Department of Education, or be curren...
Shank form BT50 Max.tool weight g 18 Max. tool size (diameter/length) mm Φ112(NeighborhoodΦ200)/350Φ125(NeighborhoodΦ250)/350 Tool change time (tool to tool) / tool change method Sec 5 / Random X/Y/Z axis position accuracy mm 0.020/0.016/0.062(Two-way...
But a few years ago, I did something very unusual in science. As a full professor of neural science, I decided to completely switch my research program. Because I encountered something that was so amazing, with the potential to change so many li...
The sampling interval was defined as the time for each product to reach 95% of full cure. The final cure can take hours or longer, so that by using this sampling interval we will find the highest concentration of MDI in the air for each product. ...
be full of energy energetic a. 精力旺盛的,精力充沛的 energetically adv. 16. enough n. 足够 adj.足够的,充分的 ad.足够地,充分地 I can’t thank you enough.=I can’t thank you too much. 再怎么感谢你都不够(我非常感谢你)。 ...
fit in with 与……合得来;适应 3. focus on 集中精力于 fix one’s attention on 将注意力集中在 fix one’s eyes on 注意;凝视 concentrate on 集中精力于 pay attention to 注意 写作句式 同位语从句 1. It shows a common phenomenon nowadays...
今天上午,南京疾控中心通报了最新情况:这轮疫情传播的源头已经查明,是一例来自俄罗斯的航班境外病毒输入病例,感染的是传染性极强的印度德尔塔病毒毒株。 最致命的地方,是南京机场保洁人员失职,防护洗脱不规范,造成受污染的飞机机舱清理消杀严重不到位,个别保洁员被感染,病毒进...
And essentially try and decode how those brief bursts of electrical activity, which is how neurons communicate with each other, how those brief bursts either allowed us to form a new memory, or did not. 并真的试图破解那些短暂的突升电流活动,也...
activity of individual brain cells in the hippocampus as subjects were forming new memories. And essentially try and decode how those brief bursts of electrical activity, which is how neurons communicate with each other, how those brief bursts eith...