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  2. Kynurenine—oxoglutarate transaminase - Wikipedia

    en.wikipedia.org/wiki/Kynurenine—oxoglutarate...

    Thus, the two substrates of this enzyme are L-kynurenine and 2-oxoglutarate, whereas its two products are 4-(2-aminophenyl)-2,4-dioxobutanoate and L-glutamate. The former product is an unstable α-oxo acid that quickly undergoes intramolecular cyclization to form kynurenic acid. [1]

  3. Glossary of chess problems - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chess_problems

    Ideally, White should have only one move at each juncture that solves a problem (unless the plan is conceptual such as in the well-known "Trojan Horse Puzzle" study by Ben Schultz). [1] Barring examples such as these, if White has an alternative at any stage but the first move, this is a dual ; if multiple winning moves are available at the ...

  4. Proof that 22/7 exceeds π - Wikipedia

    en.wikipedia.org/wiki/Proof_that_22/7_exceeds_π

    [2] The purpose of the proof is not primarily to convince its readers that ⁠ 22 / 7 ⁠ (or ⁠3 + 1 / 7 ⁠) is indeed bigger than π. Systematic methods of computing the value of π exist. If one knows that π is approximately 3.14159, then it trivially follows that π < ⁠ 22 / 7 ⁠, which is approximately 3.142857.

  5. Harshad number - Wikipedia

    en.wikipedia.org/wiki/Harshad_number

    The number 18 is a harshad number in base 10, because the sum of the digits 1 and 8 is 9, and 18 is divisible by 9.; The Hardy–Ramanujan number (1729) is a harshad number in base 10, since it is divisible by 19, the sum of its digits (1729 = 19 × 91).

  6. Circle L engine - Wikipedia

    en.wikipedia.org/wiki/Circle_L_engine

    It is a 1.7 L; 102.9 cu in (1,686 cc) inline-four 16-valve turbocharged diesel engine originally designed by Isuzu but now owned by General Motors. The engine was produced in Europe by General Motors for use in the Opel , Vauxhall and Chevrolet vehicles and by Honda for use in the Civic compact car .