Testing procedures for galactomannan purification

被引：64

作者：

Azero, EG ^{[1
]}

Andrade, CT ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Macromol, BR-21945970 Rio De Janeiro, RJ, Brazil

来源：

POLYMER TESTING | 2002年 / 21卷 / 05期

关键词：

nonconventional galactomannans; guar gum; locust bean gum; viscosity;

D O I：

10.1016/S0142-9418(01)00123-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Galactomannans obtained from Cassia javanica, Caesalpinia pulcherrima and Prosopis juliflora seeds, as well as commercial samples of locust bean gum (LBG) and guar gum (GG), were submitted to extraction and purification procedures. Viscometric measurements of their dilute aqueous solutions were performed in a Low Shear 40 rheometer in the shear rate range of 10(-3) to 10(2) s(-1). To obtain the intrinsic viscosity of these galactomannans, additional purification procedures, filtration through 0.45 mum membranes or centrifugation at 12 000 rpm for 1 h, were carried out. Intrinsic viscosities and Huggins' coefficient values were substantially different, depending on the purification method used. The results were attributed to differences in fine structure. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：551 / 556

页数：6

共 13 条

[1] Solution properties of the galactomannans extracted from the seeds of Caesalpinia pulcherrima and Cassia java']javanica:: comparison with locust bean gum [J].

Andrade, CT ;

Azero, EG ;

Luciano, L ;

Gonçalves, MP .

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 1999, 26 (2-3) :181-185

[2]

[Anonymous], THICKENING GELLING A

[3]

CLARK AH, 1986, GUMS STABILISERS FOO, V3, P429

[4]

Dea I. C. M., 1975, Advances in Carbohydrate Chemistry and Biochemistry, V31, P241

[5] EFFECT OF GALACTOSE-SUBSTITUTION-PATTERNS ON THE INTERACTION PROPERTIES OF GALACTOMANNANS [J].

DEA, ICM ;

CLARK, AH ;

MCCLEARY, BV .

CARBOHYDRATE RESEARCH, 1986, 147 (02) :275-294

[6] TERTIARY AND QUATERNARY STRUCTURE IN AQUEOUS POLYSACCHARIDE SYSTEMS WHICH MODEL CELL-WALL COHESION - REVERSIBLE CHANGES IN CONFORMATION AND ASSOCIATION OF AGAROSE, CARRAGEENAN AND GALACTOMANNANS [J].

DEA, ICM ;

MCKINNON, AA ;

REES, DA .

JOURNAL OF MOLECULAR BIOLOGY, 1972, 68 (01) :153-&

[7]

Maier H., 2012, IND GUMS, V3rd, P181, DOI DOI 10.1016/B978-0-08-092654-4.50012-7

[8]

Morris E. R., 1981, Carbohydrate Polymers, V1, P5, DOI 10.1016/0144-8617(81)90011-4

[9] VISCOSITY MOLECULAR-WEIGHT RELATIONSHIPS, INTRINSIC CHAIN FLEXIBILITY, AND DYNAMIC SOLUTION PROPERTIES OF GUAR GALACTOMANNAN [J].

ROBINSON, G ;

ROSSMURPHY, SB ;

MORRIS, ER .

CARBOHYDRATE RESEARCH, 1982, 107 (01) :17-32

[10]

SEAMAN JK, 1980, HDB WATER SOLUBLE GU, pC14

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