concerted reactions
41Organostannane addition — reactions comprise the nucleophilic addition of an allyl , allenyl , or propargylstannane to an aldehyde, imine, or, in rare cases, a ketone[1]. Organostannane addition to carbonyl groups constitutes one of the most common and efficient methods… …
42National Labor Relations Act — President Franklin Delano Roosevelt signs the act on July 9, 1935. Secretary of Labor Frances Perkins (right) looks on. The National Labor Relations Act or Wagner Act (after its sponsor, New York Senator Robert F. Wagner) (Pub.L. 74 198,… …
43Azide alkyne Huisgen cycloaddition — The Azide Alkyne Huisgen Cycloaddition is a 1,3 dipolar cycloaddition between an azide and a terminal or internal alkyne to give a 1,2,3 triazole. Rolf Huisgen[1] was the first to understand the scope of this organic reaction. American chemist K …
44Propionyl-CoA carboxylase — PCCA redirects here. For other uses, see PCCA (disambiguation). Propionyl CoA carboxylase Identifiers EC number 6.4.1.3 CAS number …
45Health and Disease — ▪ 2009 Introduction Food and Drug Safety. In 2008 the contamination of infant formula and related dairy products with melamine in China led to widespread health problems in children, including urinary problems and possible renal tube… …
46ancient Greek civilization — ▪ historical region, Eurasia Introduction the period following Mycenaean civilization, which ended in about 1200 BC, to the death of Alexander the Great, in 323 BC. It was a period of political, philosophical, artistic, and scientific… …
472011 Wisconsin protests — Part of 2011 United States public employee protests Thousands gather inside Madison Wisconsin s Capitol …
48Jupiter — /jooh pi teuhr/, n. 1. Also called Jove. the supreme deity of the ancient Romans: the god of the heavens and of weather. Cf. Zeus. 2. Astron. the planet fifth in order from the sun, having an equatorial diameter of 88,729 mi. (142,796 km), a mean …
49metabolic disease — ▪ pathology Introduction any of the diseases or disorders that disrupt normal metabolism, the process of converting food to energy on a cellular (cell) level. Thousands of enzymes participating in numerous interdependent metabolic pathways… …
50Epoxide — A generic epoxide. An epoxide is a cyclic ether with three ring atoms. This ring approximately defines an equilateral triangle, which makes it highly strained. The strained ring makes epoxides more reactive than other ethers. Simple epoxides are… …
