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Cuprospinel is a mineral.Cuprospinel is an inverse spinel with the chemical formula CuFe 2 O 4, where copper substitutes some of the iron cations in the structure. [4] [5] Its structure is similar to that of magnetite, Fe 3 O 4, yet with slightly different chemical and physical properties due to the presence of copper.
A pit latrine, also known as pit toilet, is a type of toilet that collects human waste in a hole in the ground. [2] Urine and feces enter the pit through a drop hole in the floor, which might be connected to a toilet seat or squatting pan for user comfort. [2]
In the UK, a cesspit is a closed tank for the reception and temporary storage of sewage; in North America, this is simply referred to as a "holding tank".Because it is sealed, the tank must be emptied frequently – on average every 6 weeks [3] – but frequency varies a great deal and can be as often as weekly or as rarely as quarterly.
Ptychites studeri ammonoid fossil from Triassic rocks in Bosnia. During the Triassic, rifting emplaced igneous rocks, including large plutons up to 50 cubic kilometers in size, made up of gabbro, diorite, granodiorite, granite, albite, syenite and occasionally metamorphosed to greenschist or amphibolite-grade on the sequence of metamorphic facies.
A small transformer potted in epoxy. The surface visible on the right is formed by the potting compound that has been poured into the plastic box. In electronics, potting is the process of filling a complete electronic assembly with a solid or gelatinous compound.
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Alcohol is still more widely used, but 2022 was the first time this intensive level of marijuana use overtook daily and near-daily drinking, said the study’s author, Jonathan Caulkins, a ...
A study in 2012 evaluated South Africa's bucket eradication programme and highlighted the following weaknesses: "One-size-fits-all" toilets were constructed that did not meet the special sanitation needs of vulnerable groups; health and hygiene education and user education had not been integrated; community participation barely took place; and ...