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单词 parapectin
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parapectin
parapectin n.
Brit. /ˌparəˈpɛktɪn/
,
U.S. /ˌpɛrəˈpɛktn/
[ < para- prefix1 + pectin n., after French parapectin (E. Frémy 1848, in Ann. de chim. et de physique 24 14)] now historical a neutral substance reported as obtained as a translucent jelly by boiling pectin and precipitating with alcohol.
ΚΠ
1852 T. F. Betton tr. V. Regnault Elements Chem. II. iv. 480 An aqueous solution of pectin is converted, by boiling for several hours, into a new white substance, called parapectin.
1877 H. Watts Dict. Chem. (new ed.) IV. 365 Parapectin is an amorphous, neutral substance resembling pectin.
1916 Jrnl. Industr. & Engin. Chem. 8 85/1 Pectin is in reality parapectin, and forms a colloidal solution in water, from which it may be precipitated by ethyl alcohol.
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