toxic than carbon black and can be more toxic than quartz, which is considered a serious occupational health hazard in chronic inhalation exposures.
• If fine NT dusts are present in a work environment, exposure protection strategies should be implemented to minimize human exposures.
Strong chemical and materials hygiene.
HS&E educational program for all participants.
Protection
hazard.
2. Class 2 - Gases
(DIV 2.1 Flammable gas. / 2.2 Non Flammable, non-toxic gas / 2.3 Toxic gas)
3. Class 3 - Flammable Liquids (불에 잘 붙는 페인트, Thinner 등)
4. Class 4 - Flammable Solids
(DIV 4.1 가연성 고체, 4.2 연소되기 쉬운 물질, 4.3 물에 접촉 시, 가연성 가스를 방출)
5. Class 5 - Oxidizing Substances and Organic Peroxide
teachers over-emphasize the importance of reading and grammar skills while underestimating the significance of listening and speaking related materials in the textbooks and teaching materials. By this, we mean that most teachers find the listening and speaking materials within textbooks either boring or unnecessary and thus fail to spend enough time and effort teaching them to the students.
Abstract
Bioethanol is one of the alternative sources of oil resources which received attention with biodiesel. Many countries produce bioethanol from food sources such as corn and sugarcane, but it causes food-energy conflicts and farmland problem. So it needs to focus on new biomass which is sustainable, renewable, cost-effective and do not occurred any conflicts. Algae are one of the bioma