英语词汇“alpha cellulose”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

alpha cellulose n. Biochemistry a form of cellulose consisting of long polymer chains; spec. the portion of a cellulosic material that is insoluble in sodium hydroxide solution; cf. alpha pulp n.See also beta cellulose n. at beta n. Additions, gamma cellulose n. at gamma n. and adj. Compounds 2b.

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1901 J. Hübner tr. J. Erfurt Dyeing Paper Pulp i. 6 (caption) Esparto or alpha cellulose taken from paper.

1912 C. F. Cross & E. J. Bevan Res. on Cellulose III. ii. 23 The cellulose is fractionated by this treatment into:—α Cellulose: insoluble in NaOHAq (17 p.ct. NaOH). β Cellulose: soluble and reprecipitated by acids. γ Cellulose: not reprecipitated: permanently soluble.

1962 Amer. Jrnl. Bot. 49 929/2 To determine α-cellulose, cell wall preparations were extracted with 0.05 n H₂SO₄ at 100 C.

1973 J. H. de Bussy Materials & Technol. VI. i. 105 The softwoods are intrinsically more resistant to attack than the hardwoods because of their higher alpha-cellulose and lignin contents.

2003 C. A. Smith in E. R. S. Hodges Guild Handbk. Sci. Illustr. iii. 65/1 High alpha-cellulose content in a paper implies good stability, so the term is used frequently by manufacturers of high-quality wood-based papers to suggest purity approaching cotton-fiber paper.

单词	alpha cellulose
释义	> as lemmas alpha cellulose alpha cellulose n. Biochemistry a form of cellulose consisting of long polymer chains; spec. the portion of a cellulosic material that is insoluble in sodium hydroxide solution; cf. alpha pulp n.See also beta cellulose n. at beta n. Additions, gamma cellulose n. at gamma n. and adj. Compounds 2b. ΚΠ 1901 J. Hübner tr. J. Erfurt Dyeing Paper Pulp i. 6 (caption) Esparto or alpha cellulose taken from paper. 1912 C. F. Cross & E. J. Bevan Res. on Cellulose III. ii. 23 The cellulose is fractionated by this treatment into:—α Cellulose: insoluble in NaOHAq (17 p.ct. NaOH). β Cellulose: soluble and reprecipitated by acids. γ Cellulose: not reprecipitated: permanently soluble. 1962 Amer. Jrnl. Bot. 49 929/2 To determine α-cellulose, cell wall preparations were extracted with 0.05 n H₂SO₄ at 100 C. 1973 J. H. de Bussy Materials & Technol. VI. i. 105 The softwoods are intrinsically more resistant to attack than the hardwoods because of their higher alpha-cellulose and lignin contents. 2003 C. A. Smith in E. R. S. Hodges Guild Handbk. Sci. Illustr. iii. 65/1 High alpha-cellulose content in a paper implies good stability, so the term is used frequently by manufacturers of high-quality wood-based papers to suggest purity approaching cotton-fiber paper. extracted from alphan.adj. < as lemmas
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> as lemmas