结果1 题目 The toy package has a label that says "Non-toxic materials". This means the package is: A. Safe B. Unsafe C. Not sure D. Can't tell 相关知识点: 试题来源: 解析 A。“Non-toxic materials”意思是非有毒材料,说明包装内的玩具材料是安全的,所以包装是安全的。 反馈 收藏 ...
US6723349 Oct 11, 2000 Apr 20, 2004 Emory University Materials that can remove highly toxic contaminants, such as chemical warfare agents (cwas), from the environment can ultimately reduce a soldier's exposure to the agent, examples of materials include creams, powders, coatings, and fabrics...
evolution are simultaneously realized by the two-step optimization, benefiting for synergistically improving thermoelectric performance. As a result, theZTof the Cu1.992SSe0.016(Cu2SnSe4)0.004specimen reaches approximately 1.6 at 873 K, which is comparable to that of other Cu-based thermoelectric mat...
Compared with traditional sensors, wearable sensors with mechanical softness and deformability are able to adapt to geometric nonlinearities and deformations caused by motion that occurs in application scenarios, thus ensuring stable and effective signal output under various complex working conditions. Various...
Cell phones contain some toxic(有毒的) materials, like lead(铅),mercury(水银) and cadmium(镉). If your phone goes to a landfill, thesetoxic materials can get out and get into the water under the ground. That'sthe water we need to drink or water that goes into rivers or the ocean....
Phototoxicity is the ability of a compound to become more toxic after exposure to light. Materials that are applied to the skin, or those that are distributed or accumulate in sun-exposed areas after a systemic exposure may pose a risk for phototoxicity if they also absorb significant amounts ...
Also, in some materials manufacturing processes, toxic substances are produced, and the ecological impact of their disposal must be considered. Many materialsthat we useare derived from resourcesthat are nonrenewable, that is, not capable of being regenerated. These include polymers,for which the pr...
are subject to the IRS excise tax. To ensure compliance, Microsoft has prohibited the use of ODSs in the manufacture of Microsoft devices. Microsoft uses a three-pronged approach to enforce this prohibition: (1) Microsoft’s restricted substance specification, H00594, that all suppliers must ...
Titanium and its alloys are one of the important engineering materials that are becoming increasingly popular for aerospace and biomedical applications due to their wide range of desirable properties. However, these unique properties of ... LC Zhang,C Yang - Nova Science Publishers 被引量: 0发表:...
Nonaromatic and nonconjugated fluorescent materials are promising for in vivo uses, but usually have low fluorescence quantum yields and limited responsiveness. Here, the authors report a polycysteine derived from natural amino acids that displays intrinsic fluorescence, color switching properties and appli...