A CALORIMETRIC STUDY OF COOPERATIVE PHASE-EQUILIBRIA IN MICROBIAL POLYSACCHARIDES

被引：9

作者：

CESARO, A ^{[1
]}

CUMANI, J ^{[1
]}

GECIOVA, R ^{[1
]}

MICHELAZZO, F ^{[1
]}

机构：

[1] RES CTR POLYBIOS,TECHNOL BIOPOLYMERS LAB,AREA RIC,I-34012 TRIESTE,ITALY

来源：

THERMOCHIMICA ACTA | 1993年 / 227卷

关键词：

D O I：

10.1016/0040-6031(93)80260-H

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Some calorimetric data of the order-disorder conformational transitions of natural polysaccharides from microorganisms are presented in the more general thermodynamic framework of the cooperative helix-coil transition of linear biopolymers. A new home-made data acquisition and processing procedure is presented and discussed. The phase transition is analysed for a neutral capsular polysaccharide from Rhizobium trifolii TA1 and for two ionic exopolysaccharides, xanthan from Xanthomonas campestris and succinoglycan from a strain of Rhizobia. Structural features, such as the linear charge density, are discussed as determining factors in the thermal stability of the helical ionic polysaccharides.

引用

页码：167 / 183

页数：17

共 35 条

[1]

ASPINALL GO, 1982, POLYSACCHARIDES, V1

[2]

BRANT DA, 1980, BIOCH PLANTS, V3, pCH11

[3]

Brant DA, 1982, CARBOHYD POLYM, V2, P232

[4]

CANTOR CR, 1980, BIOPHYSICAL CHEM, V3, pCH23

[5]

CAVALLO S, 1985, THESIS TRIESTE U

[6] THE INFLUENCE OF SIDE-CHAIN MODIFICATIONS ON THE SOLUTION BEHAVIOR OF THE CAPSULAR POLYSACCHARIDE FROM RHIZOBIUM TRIFOLII STRAIN-TA-1 [J].

CESARO, A ;

ESPOSITO, P ;

BERTOCCHI, C ;

CRESCENZI, V .

CARBOHYDRATE RESEARCH, 1989, 186 (01) :141-155

[7] SUPRAMOLECULAR STRUCTURE OF MICROBIAL POLYSACCHARIDES IN SOLUTION - FROM CHAIN CONFORMATION TO RHEOLOGICAL PROPERTIES [J].

CESARO, A ;

GAMINI, A ;

NAVARINI, L .

POLYMER, 1992, 33 (19) :4001-4008

[8] MOLECULAR-MODEL OF THE COOPERATIVE AMYLOSE IODINE TRIIODIDE COMPLEX [J].

CESARO, A ;

BENEGAS, JC ;

RIPOLL, DR .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (12) :2787-2791

[9]

CESARO A, 1987, IND POLYSACCHARIDES, P99

[10]

CESARO A, 1981, ACS SYM SER, V150, P477

← 1 2 3 4 →