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1,2,6-Hexanetriol is a trivalent alcohol with two primary and one secondary hydroxy group. It is similar to glycerol in many respects and is used as a substitute for glycerol in many applications due to its more advantageous properties, such as higher thermal stability and lower hygroscopicity .
The 2.6 Challenge is a response to the COVID-19 pandemic in the United Kingdom, designed to help replace lost income to the charitable sector. [1] A particular concern was the cancellation of the London Marathon which raised over £60m in 2019. [2]
If the numerator and the denominator do not share any factor greater than 1, the fraction is already reduced to its lowest terms, and it is said to be irreducible, reduced, or in simplest terms. For example, 3 9 {\displaystyle {\tfrac {3}{9}}} is not in lowest terms because both 3 and 9 can be exactly divided by 3.
DiampurineT DNA base pair. In cyanophage S-2L (Siphoviridae), diaminopurine is used instead of adenine (host evasion). [6] Diaminopurine base (Z) pairs perfectly with thymine (T) as it is identical to adenine (A) but has an amine group at position 2 forming 3 intermolecular hydrogen bonds, eliminating the major difference between the two types of basepairs (weak:A-T and strong:C-G).
2,6-Dichlorophenol is a compound with formula C 6 H 3 Cl 2 OH. It is one of the six isomers of dichlorophenol. It is a colorless solid. Its pK a is 6.78, which is about 100x more acidic than 2-chlorophenol (8.52) and 1000x more acidic than phenol itself (9.95). [3]
2,6-DMP is produced by the methylation of phenol. With production >100,000 tons/y, it is the most important xylenol. The methylation is carried out by contacting gaseous phenol and methanol at elevated temperatures in the presence of a solid acid catalyst: [2] [3] C 6 H 5 OH + 2 CH 3 OH → (CH 3) 2 C 6 H 3 OH + 2 H 2 O
2-6-6-2 (tender) CSF&E -- Imported by Sunset—400 copies 2-6-6-2T (tank) Hammond Lumber Co—Dai Young, imported by Custom Brass—1302 copies The "second generation" of imported brass locomotives, beginning about 1975, were imported for a wider variety of roads and locomotive classes, with closer attention to detail.
The synthesis of 2,6-diacetylpyridine begins with oxidation of the methyl groups in 2,6-lutidine to form dipicolinic acid. This process has been well established with potassium permanganate and selenium dioxide. [3] The diketone can be formed from the diester of picolinic acid groups through a Claisen condensation. [4]