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单词 menadione
释义

Definition of menadione in English:

menadione

noun ˌmɛnəˈdʌɪəʊnˌmenəˈdīˌōn
mass nounMedicine
  • A synthetic yellow compound related to menaquinone, used to treat haemorrhage.

    Chemical formula: C₁₁H₈O₂

    Example sentencesExamples
    • After absorption, menadione is thought to become alkylated into biologically active isoprenylated menaquinones.
    • Hepatoma-bearing rats receiving intraperitoneal injections of menadione (10 mg / 2mL weekly for four weeks) demonstrated an increased survival rate of 60 days compared to 17 days for controls (five of 16 lived longer than controls).
    • The K vitamins exist naturally as K 1 in green vegetables and K 2 produced by intestinal bacteria and K 3 is synthetic menadione.
    • This medium is prepared twice each week and is complemented with 8% sheep blood, menadione, and gentamicin, making this medium selective for anaerobes.
    • Using concentrations that had no effect on cell growth, we found that menadione had no significant effect on recombination under the conditions tested in either the wild-type or BER mutant backgrounds.

Origin

1940s: from me(thyl) + na(phthalene) + the suffix -dione, used in names of compounds containing two carbonyl groups.

 
 

Definition of menadione in US English:

menadione

nounˌmenəˈdīˌōn
Medicine
  • A synthetic yellow compound related to menaquinone, used to treat hemorrhage.

    Alternative name: 2-methyl-1,4-naphthoquinone; chemical formula: C₁₁H₈O₂

    Also called "vitamin K3" (see vitamin K)
    Example sentencesExamples
    • This medium is prepared twice each week and is complemented with 8% sheep blood, menadione, and gentamicin, making this medium selective for anaerobes.
    • Using concentrations that had no effect on cell growth, we found that menadione had no significant effect on recombination under the conditions tested in either the wild-type or BER mutant backgrounds.
    • The K vitamins exist naturally as K 1 in green vegetables and K 2 produced by intestinal bacteria and K 3 is synthetic menadione.
    • After absorption, menadione is thought to become alkylated into biologically active isoprenylated menaquinones.
    • Hepatoma-bearing rats receiving intraperitoneal injections of menadione (10 mg / 2mL weekly for four weeks) demonstrated an increased survival rate of 60 days compared to 17 days for controls (five of 16 lived longer than controls).

Origin

1940s: from me(thyl) + na(phthalene) + the suffix -dione, used in names of compounds containing two carbonyl groups.

 
 
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更新时间:2024/12/23 13:49:43