In addition, it is one of the densest, exceeded only by platinum, iridium, and osmium. Rhenium has a hcp crystal structure, with lattice parameters a=276.1 pm and c=445.6 pm. Discovery Rhenium (Latin: Rhenus meaning: “Rhine,”one of the major rivers in Europe) was the second last-...
CBD is bi-phasic, meaning it produces unique effects for any individual user whenever the amount of CBD consumed is substantially elevated or reduced. When CBD is taken in small doses, users typically experience an energizing effect. However, when CBD is taken in high doses, the effects are ...
1, meaning that all or most of the observed toxicity was caused by the presence of one toxicant (i.e., ammonia). The developed toxicity identification evaluation procedure is suggested as a usefull tool for the identification and confirmation of toxicants in contaminated sediments....
The blue circles, bars, error bars and dots have the same meaning as those in b. d, Scatter plots illustrating the correlation between original and reproduced results—as measured by two-sided Spearman correlation analysis—consistently show a considerable correlation across three metrics for the ...
The name ‘Chrysene’ originates from the Greek word chrysos, meaning ‘gold,’ and is due to the golden yellow color of the slightly impure crystals. However, in pure state, chrysene is a colorless, crystalline solid. It has characteristic red–blue fluorescence under UV light. Some ...
(BDEs 153 and 183) did not induce mortality at any concentration tested, meaning that the LC50values were at least greater than 11.7 and 8.4mg/L, respectively. This trend supported the long-held hypothesis that lower-brominated congeners elicit a greater toxic effect[145]. Exposure of zebrafish...
Molybdenum acts as a cofactor, meaning it's a molecule that increases the rate of reaction of an enzyme. So you can think of molybdenum as a little pep pill that certain enzymes take that springs them into action. Enzymes involved in important life functions rely on molybdenum for this boost...
In a different section was another sentence that should have made an abiding impression. It concerned isomers, spontaneously twinned molecules identical in atomic composition but not identical in atomic conformation — or, often, in toxicity. Many chemicals were “chiral”, meaning “handed”. They ...
The redox couple APS-sulfite has E0 60 mV, meaning that APS can reduce to sulfite (by APS reductase –AprAB) and ferredoxin (NADH) (two electron input is required). During APS reduction, AMP (adenosine monophosphate) is formed and then two ADP molecules (by ATP dependent adenylate kinase)...
Sep 9,2019Inorganic chemistry Lead-Hazard and Toxicity Lead is a bluish-white, heavy metallic element with properties that are more metal-like than the properties of metal loids or nonmetals. Lead can be found in its native state, meaning that elemental metallic lead can be found in deposits...