Whereas the pure PVA film could not block UV light, the ability of CND-films to block UV light could be adjusted by altering the proportion of CNDs in the film. The larger the proportion of CNDs, the greater the extent of UV blocking. CND-film containing 32 wt% CNDs completely blocked ...
Cloze Ultraviolet rays, or UV rays, from the sun can harm the eyes and skin. In the short term, bright sunlight can cause eyestrain as the eyes struggle 1_ (focus)through the glare of bright light. _2_ much sun in one day can also cause painful sunburn. In the long term, the sun...
美 英 na.紫外线 网络紫外光区雷射 英汉 网络释义 na. 1. 紫外线 释义: 全部,紫外线,紫外光区雷射
“We know UV light is dangerous,” Fisher says, but many people choose not to protect themselves. Fisher and his colleagues exposed mice to a moderate amount of UV light five days a week, for six weeks. The scientists shaved the mice so the light would reach their skin. The animals r...
To the HfO 2 film, the specimen can be verified from the analysis of theultravioletrange. 提出通过对紫外波段的分析来检验氧化铪薄膜样品的制备. 期刊摘选 Solar light can send offultravioletrays, just like the sun does. 太阳灯能够像太阳一样放射出紫外线. ...
摘要: Health educators are in an ideal position to teach individuals about dangers from the sun's ultraviolet light and how to prevent damage to eyes. Ultraviolet light is described, eye pathology which can be caused by it is outlined, and protective eyewear is discussed. (IAH)关键词:...
12.下文"So if you're out for a while,cover up with lightweight long sleeves and pants."(所以,如果你要出去一段时间,穿轻便的长袖和裤子)说明外出时,要穿防晒的衣物,C项"No sunscreen perfectly blocks the sun's rays"(没有防晒霜能完全阻挡阳光)说明仅靠防晒霜是不够的,引出下文"所以外出还要穿...
The sun's ultraviolet-B rays absorbed through the skin are the body's main source of this nutrient. 人体获得维生素D的主要来源是通过皮肤吸收太阳的中波紫外线。 dongxi.net 5. Scorpions glow under ultraviolet light, but scientists do not know why. 蝎子在紫外线的照射下能发光,但是至今科学家还没解...
最终答案: Solar light can send off ultraviolet rays, just like the sun does. 月光可以发出紫外线,就像太阳一样。 问题分析: 1. 题目要求选择合适的动词短语,表示“月光像太阳一样,也能___紫外线”。 2. 选项分析: - A. take off(脱掉,起飞) - B. send off(发出,寄出) - C. put off(推迟) ...
Ultraviolet light refers to a type of radiation emitted by the sun and artificial sources, which is divided into four regions: Vacuum (UV), Short wave (UV-C), Middle wave (UV-B), and Longwave (UV-A). It has been used for more than a century for disinfection purposes, such as saniti...