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The number of genera used in PPG I has proved controversial. PPG I uses 18 lycopod and 319 fern genera. [1] The earlier system put forward by Smith et al. (2006) had suggested a range of 274 to 312 genera for ferns alone. [2] By contrast, the system of Christenhusz and Chase (2014) used 5 lycopod and about 212 fern genera. [3]
On January 7, 2009, the x64 version of the Windows 7 Beta (build 7000) was leaked onto the web, with some torrents being infected with a trojan. [45] [46] At CES 2009, Microsoft CEO Steve Ballmer announced the Windows 7 Beta, build 7000, had been made available for download to MSDN and TechNet subscribers in the format of an ISO image. [47]
Windows Server, version 1903 [10] Redstone 5 May 21, 2019 1903 18362 December 8, 2020 [10] Windows Server, version 1909 [10] Vanadium November 12, 2019 1909 18363 May 11, 2021 [10] Windows Server, version 2004 [14] Vibranium June 26, 2020 2004 19041 December 14, 2021 [10] Windows Server, version 20H2 [14] Iron October 20, 2020 20H2 19042 August ...
The main editions also can take the form of one of the following special editions: N and KN editions The features in the N and KN Editions are the same as their equivalent full versions, but do not include Windows Media Player or other Windows Media-related technologies, such as Windows Media Center and Windows DVD Maker due to limitations set by the European Union and South Korea ...
PPG soon became the United States' first commercially successful producer of high-quality, thick flat glass using the plate process. PPG was also the world's first plate glass plant to power its furnaces with locally produced natural gas, an innovation which rapidly stimulated widespread industrial use of the cleaner-burning fuel. [3]
The term polypropylene glycol or PPG is reserved for polymer of low- to medium-range molar mass when the nature of the end-group, which is usually a hydroxyl group, still matters. The term "oxide" is used for high-molar-mass polymer when end-groups no longer affect polymer properties.
A photolabile protecting group (PPG; also known as: photoremovable, photosensitive, or photocleavable protecting group) is a chemical modification to a molecule that can be removed with light. PPGs enable high degrees of chemoselectivity as they allow researchers to control spatial, temporal and concentration variables with light.
PPG Industries, a U.S. manufacturer, formerly known as Pittsburgh Plate Glass PPG Place, its office complex; Polypropylene glycol, a polymer; Post-prandial glucose, a measure of blood sugar after a meal; Pounds per gallon, a measure of density, typically of a fluid. It is common in the oil industry, especially as a unit for Mud weight.