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Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
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How do animals obtain water in the winter when water sources are frozen. Some hibernate; that's all I know. Melchoir 01:09, 1 May 2006 (UTC) []. Although this is a very silly question for us Canadians, I actually found a quote: "Studies in Canada have shown some cows have gone 50 to 60 days with snow as the sole water source without any adverse effects.
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2.19 Fabric query 3 comments 2.20 Literature regarding a new job as the president of the chamber of commerce (preferably related to economic development and diversity)
The pomegranate is a shrub or small tree growing 5 to 10 m (16 to 33 ft) high, with multiple spiny branches. It is long-lived, with some specimens in France surviving for 200 years. [ 7 ] P. granatum leaves are opposite or subopposite, glossy, narrow oblong, entire, 3–7 cm ( 1 + 1 ⁄ 4 – 2 + 3 ⁄ 4 in) long and 2 cm ( 3 ⁄ 4 in) broad.
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds Written ...
The rate data used in kinetic analyses are commonly obtained from enzyme assays. In 1913 Leonor Michaelis and Maud Leonora Menten proposed a quantitative theory of enzyme kinetics, which is referred to as Michaelis–Menten kinetics. [68] The major contribution of Michaelis and Menten was to think of enzyme reactions in two stages.