Starch radicals .1. Thermolysis of plain starch

被引：43

作者：

Ciesielski, W

Tomasik, P

机构：

[1] TEACHERS COLL, DEPT GEN CHEM, PL-42201 CZESTOCHOWA, POLAND

[2] UNIV AGR, DEPT CHEM, PL-31120 KRAKOW, POLAND

来源：

CARBOHYDRATE POLYMERS | 1996年 / 31卷 / 04期

关键词：

D O I：

10.1016/S0144-8617(96)00122-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Plain starch from two varieties of potato and wheat, one variety of rye, triticale, oat, corn, waxy corn, cassava and amaranthus was thermolyzed subsequently at 170, 250, 285, 300 and 325 degrees C for 30 min-2 h intervals. The concentration of unpaired spins was determined. Among varieties studied, the oat starch is least thermally resistant, and both the triticale and maize starches are most thermally resistant. Radicals generated in such a manner are very stable. The analysis of experimental and simulated EPR spectra points to the unpaired spin delocalization and steric hindrances are responsible for the stability of such radicals. (C) 1997 Published by Elsevier Science Ltd.

引用

页码：205 / 210

页数：6

共 12 条

[1]

ABAGYAN GV, 1979, ARM KHIM ZH, V32, P850

[2] The relation of starch-iodine absorption spectra to the structure of starch and starch components [J].

Baldwin, RR ;

Bear, RS ;

Rundle, RE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1944, 66 :111-115

[3] STUDIES ON MUTAGENICITY OF CARAMEL [J].

BARABASZ, W ;

BRZOZKA, L ;

KRZECZEK, J ;

TOMASIK, P .

STARCH-STARKE, 1990, 42 (02) :69-71

[4] PHYSICOCHEMICAL PROPERTIES OF DEFATTED OAT STARCH [J].

GIBINSKI, M ;

PALASINSKI, M ;

TOMASIK, P .

STARCH-STARKE, 1993, 45 (10) :354-357

[5]

HASHIWAGI H, 1981, CHEM PHARM BULL, V29, P913

[6]

*NIEHS LMB EPR, NIEHS LMB EPR SOFTW

[7] INFLUENCE OF THE PHYSICAL STRUCTURE OF IRRADIATED STARCHES IN THEIR ELECTRON-SPIN RESONANCE-SPECTRA KINETICS [J].

RAFFI, JJ ;

AGNEL, JPL .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (13) :2369-2373

[8]

SULTANKHODZHAEV.MN, 1983, 1982 P TIH S RAD CHE, V5, P1079

[9] ELECTRON-SPIN-RESONANCE STUDY OF SPIN-TRAPPED RADICALS FROM GAMMA-IRRADIATION OF GLUCOSE OLIGOMERS [J].

THIERY, JM ;

THIERY, CL ;

AGNEL, JPL ;

VINCENT, PB ;

BATTESTI, CM ;

RAFFI, JJ ;

EVANS, JC .

MAGNETIC RESONANCE IN CHEMISTRY, 1990, 28 (07) :594-600

[10]

TOMASIK P, 1985, STARCH DIE STAERKE, V47, P24

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