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Phosgene is an organic chemical compound with the formula COCl 2. It is a toxic, colorless gas; in low concentrations, ... In the research laboratory, ...
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
Traces of a toxic, colorless gas were found at the headquarters of Sweden’s security agency where a suspected gas leak last week forced authorities to evacuate some 500 people from the facility ...
Based on research by Fritz Haber into chlorine as a weapon, the Nernst–Duisberg Commission investigated the feasibility of adding phosgene to chlorine gas, to increase its lethality. [4] Work by Richard Willstätter to supply the German army with protective equipment, enabled it to contemplate the use of the far more lethal combination of ...
The release of green leaf volatiles following the cutting of a lawn is responsible for the odour of freshly cut grass.. The smell of freshly cut grass is an odour caused by green leaf volatiles (GLVs) released when it is damaged.
Those who have argued in favor of using the research include Robert Pozos from the University of Minnesota and John Hayward from the University of Victoria. [35] In a 1990 review of the Dachau experiments, Robert Berger concludes that the study has "all the ingredients of a scientific fraud" and that the data "cannot advance science or save ...
However, the animal cages used in the research were fabricated from industrial grade polycarbonate, rather than FDA food grade polycarbonate. An analysis of the literature on bisphenol A leachate low-dose effects by vom Saal and Hughes published in August 2005 seems to have found a suggestive correlation between the source of funding and the ...