| 释义 |
guar|gwɑː(r)|
[a. Hindi guar.]
1. An Indian plant, Cyamopsis tetragonoloba (psoralioides), of the family Leguminosæ, which tolerates drought and is grown as a vegetable, fodder crop, and green manure, and as a source of guar gum.
[1832W. Carey Roxburgh's Flora Indica III. 317 Goor-chikurkai..is an annual esculent plant, much cultivated in the gardens of the natives on the coast of Coromandel.] 1882Duthie & Fuller Field & Garden Crops II. 24 Guár is grown in these Provinces for two very different purposes,—as a vegetable for human consumption, and as a pulse for horses and cattle. 1908G. Watt Commercial Prod. India 449 Gúar is specially suitable as a green manure or green fodder crop. 1948Chem. Industries Jan. 60/3 As a consequence of the demand for a gum such as may be obtained from guar, General Mills undertook large scale agricultural production of the plant. 1965R. R. Agarwal Soil Fertility in India vii. 157 Cowpea (Vigna catjang), guar (Cyamopsis psoralioides)..are examples of other leguminous plants that are used as green manures.
2. Commercial guar gum.
1945Paper Mill News 8 Dec. 52/1 It is intended to explore the possibilities of tub sizing with converted guar. 1952J. P. Casey Pulp & Paper I. vii. 406 When added dry at the beater, guar acts as a strong cementing agent which greatly increases the strength of the paper. 1966Kirk-Othmer Encycl. Chem. Technol. (ed. 2) X. 750 Guar solutions can be gelled by the addition of small amounts of borax.
3. attrib., as guar seed; guar flour, commercial guar gum; guar gum, a fine greyish-white powder obtained by grinding the endosperm of guar seeds and used in the food, paper, and other industries; also, the polysaccharide that is the main constituent of this.
1945Sat. Even. Post 30 June (Back cover), Science has found that guar seeds contain a gum which has..dozens of important uses. 1946Progress thru Research (General Mills, Inc.) Fall 6/2 (caption) This experimental mill..produces guar flour for development research and commercial evaluation. 1950Jrnl. Amer. Chem. Soc. LXXII. 4634/1 Guar gum extracted from the endosperm of guar seed is a galactomannan polysaccharide in which the ratio of d-mannose to d-galactose is 2:1. 1959Smith & Montgomery Chem. Plant Gums xii. 325 The polysaccharide in guar flour, as the crude, powdered gum is sometimes called, contains 84 per cent of d-mannose and 16 per cent d-galactose... The crude guar gum..may contain 1 to 5 per cent protein. 1969Encycl. Polymer Sci. & Technol. XI. 404 Guar seeds have been the source of large quantities of industrial gum. |