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Propylene carbonate (often abbreviated PC) is an organic compound with the formula C 4 H 6 O 3. It is a cyclic carbonate ester derived from propylene glycol . [ 4 ] This colorless and odorless liquid is useful as a polar , aprotic solvent . [ 5 ]
The equation was derived by Kozeny (1927) [1] and Carman (1937, 1956) [2] [3] [4] from a starting point of (a) modelling fluid flow in a packed bed as laminar fluid flow in a collection of curving passages/tubes crossing the packed bed and (b) Poiseuille's law describing laminar fluid flow in straight, circular section pipes.
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
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1/n [oc(oc 6 h 4) 2 cme 2] n + h 2 o → (hoc 6 h 4) 2 cme 2 + co 2 More than 100 studies have explored the bioactivity of bisphenol A derived from polycarbonates. Bisphenol A appeared to be released from polycarbonate animal cages into water at room temperature and it may have been responsible for enlargement of the reproductive organs of ...
PC Power and Cooling (stylized as PC Power & Cooling), a subsidiary of FirePower Technology, is an American manufacturer of computer power supplies based in Carlsbad, California. The company was established by Doug Dodson in 1985.
The British imperial gallon (frequently called simply "gallon") is defined as exactly 4.54609 dm 3 (4.54609 litres). [4] It is used in some Commonwealth countries, and until 1976 was defined as the volume of water at 62 °F (16.67 °C) [5] [6] whose mass is 10 pounds (4.5359237 kg).
A carboy, also known as a demijohn or a lady jeanne, is a rigid container with a typical capacity of 4 to 60 litres (1 to 16 US gal). [1] [2] Carboys are primarily used for transporting liquids, often drinking water or chemicals. [3] They are also used for in-home fermentation of beverages, often beer or wine.