Describe the conditions which make nitrogen toxic. Explain in detail the nitrogen transformation in soil by plants. What is nitrogen fixation? Explain with respect to plants. Explain how the phosphorus and nitrogen cycle works Describe the nitrogen cycle. Be sure to include all of the appropri...
The Earth became covered in a thin layer of lead, and lead is toxic to many living things (including humans). When lead was banned, gasoline got more expensive because refineries could not boost the octane ratings of cheaper grades any more. Airplanes are still allowed to use leaded gasoline...
is found to be of high risk, restrictions are often regional and in countries where they are not yet banned, substances can continue to be used. Another big problem is unsafe substitutions — banned substances often are replaced with similar ones, that may pose the same or even greater risks...
The good news is that the insoluble sulfides of cadmium aren't very toxic at all because they are so insoluble - which is why they are still used in paints and as pigments for plastics. Even the soluble forms aren't that bad as long as you handle them with respect.Dispose waste ...
It is well-known that different pathogens have specific sensitivities to the aspecific or toxic action of chemical molecules. For example, a same cell type becomes much more sensitive for in vitro cytotoxic effects when cultivated in serum-free conditions; Gram-negative bacteria are much less ...
Why is methanol more toxic than ethanol? Why do fatty acid come in chains of even-numbered hydrocarbons? What is the importance of organic chemistry? Why is glycine nonpolar? Why is hexane known as a hydrocarbon? Why do while benzene fluoresces, pyridine does not?
Of the products his team tested, about nine in 10 waterproof mascaras contained PFAS, whereas only one in 10 ordinary versions of the beauty product contained the toxic chemicals. Shop small Peaslee added that larger companies that manufacture thousands of products and have robust supply chains ar...
I had some success also using hexane followed by isopropyl alcohol for final cleanup. [Caution: hexane is a toxic carcinogen.] ... Continue reading at MOLD by MICROSCOPE or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Or see these Microscopy ...
Another aspect that needs to be considered is the intended use conditions for the device. Extractions should be carried out in both a non-polar and polar solvent. Typical non-polar solvents include hexane and chloroform, and typical polar solvents include saline or water. Generally, the solvent...
What happens when sodium chloride is added to boiling water and why? Calomel (Hg_2Cl_2) is not toxic but methyl mercury chloride (CH_3HgCl) is highly toxic. What physical property explains this difference in toxicity? Describe how the elements potassium and sodiu...