thyminen.

/ˈθʌɪmɪn/

Forms: Also thymin.

Etymology: < thym- (in thymic adj.¹) + -ine suffix⁵.

1. Chemistry. A colourless crystalline alloxur base, C₅H₆N₂O₂, obtained by the action of dilute sulphuric acid on thymic acid (thymic adj.¹ 2).

ΚΠ

1894 Jrnl. Chem. Soc. 66 i. 156 Thymic acid..on heating with sulphuric acid.., thymin..is formed. This substance has neither basic nor acidic properties; it..is deposited from water in quadratic and hexagonal crystals.

1898 Schäfer's Text Bk. Physiol. I. 66.

1900 Jrnl. Chem. Soc. 78 i. 319 Thymin was originally described by Kossel as one of the decomposition products of the nucleic acid of the thymus gland. It has since been obtained from nucleic acid from other sources.

1903 Amer. Chem. Jrnl. 29 481 On boiling this mercapto derivative with hydrochloric acid we obtained thymine.

1954 New Biol. 16 15 In desoxyribose nucleic acid the purine is either adenine or guanine, the pyrimidine either cytosine or thymine.

1976 Sci. Amer. Jan. 64/3 The DNA molecule consists of two long chains of nucleotides wound in a double helix... Each nucleotide consists of a deoxyribose sugar, a phosphate group and one of four nitrogenous bases: adenine, guanine, thymine or cytosine.

2. Biochemistry. = thymopoietin n.

ΚΠ

1968 G. Goldstein in Lancet 20 July 122/1 ‘Thymin’..seems an appropriate name for this substance, which not only is present in normal thymus but also appears to be secreted normally and to have an effect in physiological concentrations on neuromuscular transmission.

1974 Basch & Goldstein in Proc. National Acad. Sci. U.S.A. 71 1477/2 It has been brought to our attention that our term thymin for this polypeptide hormone is being confused with the base thymine... We therefore intend to change our terminology in the future and use the term thymopoietin.

Derivatives

thyminic adj.

/θaɪˈmɪnɪk/ Chemistry in thyminic acid, a synonym of thymic acid (thymic adj.¹ 2).

ΘΚΠ

the world > matter > chemistry > organic chemistry > acids obtained from animals > [noun] > thymic acid

thymic acid1894

thyminic acid1898

1898 J. A. Mandel tr. O. Hammarsten Text-bk. Physiol. Chem. 100 From adenylic acid and..other nucleic acids Kossel and Neumann have prepared an acid called by them thyminic acid.

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).

单词	thymine
释义	thyminen. /ˈθʌɪmɪn/ Forms: Also thymin. Etymology: < thym- (in thymic adj.¹) + -ine suffix⁵. 1. Chemistry. A colourless crystalline alloxur base, C₅H₆N₂O₂, obtained by the action of dilute sulphuric acid on thymic acid (thymic adj.¹ 2). ΚΠ 1894 Jrnl. Chem. Soc. 66 i. 156 Thymic acid..on heating with sulphuric acid.., thymin..is formed. This substance has neither basic nor acidic properties; it..is deposited from water in quadratic and hexagonal crystals. 1898 Schäfer's Text Bk. Physiol. I. 66. 1900 Jrnl. Chem. Soc. 78 i. 319 Thymin was originally described by Kossel as one of the decomposition products of the nucleic acid of the thymus gland. It has since been obtained from nucleic acid from other sources. 1903 Amer. Chem. Jrnl. 29 481 On boiling this mercapto derivative with hydrochloric acid we obtained thymine. 1954 New Biol. 16 15 In desoxyribose nucleic acid the purine is either adenine or guanine, the pyrimidine either cytosine or thymine. 1976 Sci. Amer. Jan. 64/3 The DNA molecule consists of two long chains of nucleotides wound in a double helix... Each nucleotide consists of a deoxyribose sugar, a phosphate group and one of four nitrogenous bases: adenine, guanine, thymine or cytosine. 2. Biochemistry. = thymopoietin n. ΚΠ 1968 G. Goldstein in Lancet 20 July 122/1 ‘Thymin’..seems an appropriate name for this substance, which not only is present in normal thymus but also appears to be secreted normally and to have an effect in physiological concentrations on neuromuscular transmission. 1974 Basch & Goldstein in Proc. National Acad. Sci. U.S.A. 71 1477/2 It has been brought to our attention that our term thymin for this polypeptide hormone is being confused with the base thymine... We therefore intend to change our terminology in the future and use the term thymopoietin. Derivatives thyminic adj. /θaɪˈmɪnɪk/ Chemistry in thyminic acid, a synonym of thymic acid (thymic adj.¹ 2). ΘΚΠ the world > matter > chemistry > organic chemistry > acids obtained from animals > [noun] > thymic acid thymic acid1894 thyminic acid1898 1898 J. A. Mandel tr. O. Hammarsten Text-bk. Physiol. Chem. 100 From adenylic acid and..other nucleic acids Kossel and Neumann have prepared an acid called by them thyminic acid. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020). < n.1894
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