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Lead citrate is a compound of lead and citrate that is primarily used as an enhancer for heavy metal staining in electron microscopy. [2] This salt binds to osmium and uranyl acetate and enhances contrast in many cellular structures. Lead citrate is highly reactive with carbon dioxide.
Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes
Ion exchange is a method widely used in household filters to produce soft water for the benefit of laundry detergents, soaps, and water heaters. This is accomplished by exchanging divalent cations (such as calcium Ca 2+ and magnesium Mg 2+) with highly soluble monovalent cations (e.g., Na + or H +) (see water softening).
The reduction of blowdown by dealkalization keeps the water treatment chemicals in the boiler longer, thus minimizing the amount of chemicals required for efficient, noncorrosive operation. [2] Carbonate and bicarbonate alkalinities are decomposed by heat in boiler water releasing carbon dioxide into the steam.
A simple staining method for bacteria that is usually successful, even when the positive staining methods fail, is to use a negative stain. This can be achieved by smearing the sample onto the slide and then applying nigrosin (a black synthetic dye) or India ink (an aqueous suspension of carbon particles).
Plumbosolvency is the ability of a solvent, notably water, to dissolve lead.In the public supply of water this is an undesirable property. In (usually older) consumers' premises plumbosolvent water can attack lead pipes, lead service lines, and any lead in solder used to join copper.
Lead is not normally present in drinking water; it is released from the inside surface of lead service lines (pipes that run from the main to the house), joints connected with lead-based solder, and lead fixtures inside the house. Based on these findings, WASA was required to notify the public and implement plans to replace lead service lines ...
Variant for stainless steel: 100 g sodium thiosulphate, 10 g lead acetate, 12 g potassium sodium tartrate, 12 g copper sulfate, 1 lit water, 18-22 °C temperature of solution, 5–50 minutes, yellow, brown, red, green, blue, violet, object must be in contact with piece of copper 300 times smaller surface than surface of treated object.
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