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The reaction mechanism of the Biginelli reaction is a series of bimolecular reactions leading to the desired dihydropyrimidinone. [14]According to a mechanism proposed by Sweet in 1973 the aldol condensation of ethylacetoacetate 1 and the aryl aldehyde is the rate-limiting step leading to the carbenium ion 2.
Ingram Barge Company (IBCO) was founded in 1946 by Orrin Henry Ingram, Sr., also known as Hank. [ 1 ] [ 2 ] The company started out as Ingram Products Company, transporting primarily petroleum and running terminals in St. Paul and Louisville.
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Named for the rucksacks that the soldiers wear, rucking is also sometimes called tabbing or yomping and consists of weighing down a backpack or strapping on a weight belt as one goes about a hike ...
The particles eminating from burning scented wax melts indoors can create a “tremendous amount” of indoor air pollution — similar to pollution caused by diesel engines.
Strapping, also known as bundling and banding, is the process of applying a strap to an item to combine, stabilize, hold, reinforce, or fasten it.
The barge, which is owned by Martin Petroleum, has a 30,000-gallon capacity, but it's not clear how much leaked into the bay, said Galveston County spokesperson Spencer Lewis. He said about 6.5 ...
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
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