ESR studies on collagen irradiated with protons

被引：9

作者：

Chipara, M

Romero, JR

Ignat, M

Constantinescu, B

Secu, C

机构：

[1] Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA

[2] Cent Univ Venezuela, Caracas, Venezuela

[3] Inst Electrotech Res, Bucharest, Romania

[4] Natl Inst Nucl Phys, Bucharest, Romania

[5] Natl Inst Mat Phys, Bucharest, Romania

来源：

POLYMER DEGRADATION AND STABILITY | 2003年 / 80卷 / 01期

关键词：

collagen; irradiation; electron spin resonance; radicals; thermo-oxidative degradation;

D O I：

10.1016/S0141-3910(02)00381-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Electron spin resonance investigations on collagen irradiated with protons are reported. The resonance spectra were assigned to a convolution of lines due to similar toCH(2)-CH2. residues and peroxy radicals. Raising the temperature of the sample (in air), the concentration of similar toCH(2)-CH2. residues decreases while, the concentration of peroxy radicals increases due to the denaturation induced enhancement of the oxidation process. An increase in the apparent intensity of the recorded spectrum has been observed around 100 degreesC and ascribed to the release of adsorbed water molecules. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：45 / 49

页数：5

共 21 条

[11]

Ranby B., 1975, PHOTODEGRADATION PHO

[12] TIME AND DOSE-RELATED CHANGES IN THE THICKNESS OF PIG SKIN AFTER IRRADIATION WITH SINGLE DOSES OF SR-90/Y-90 BETA-RAYS [J].

REZVANI, M ;

HAMLET, R ;

HOPEWELL, JW ;

SIEBER, VK .

INTERNATIONAL JOURNAL OF RADIATION BIOLOGY, 1994, 65 (04) :497-502

[13]

Rezvani M, 2000, RADIAT RES, V153, P104, DOI 10.1667/0033-7587(2000)153[0104:TADRCI]2.0.CO

[14]

[15] Phase transitions in fiber materials [J].

Sandler, U ;

Wyler, A .

PHYSICAL REVIEW B, 2000, 61 (01) :16-19

[16]

Torikai A, 1999, J APPL POLYM SCI, V73, P1259, DOI 10.1002/(SICI)1097-4628(19990815)73:7<1259::AID-APP20>3.0.CO

[17]

2-#

[18] In situ observation of moisture-induced swelling of leather in an environmental scanning electron microscope [J].

Tuckermann, M ;

Mertig, M ;

Pompe, W .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2001, 72 (02) :1449-1452

[19]

WALFORD RL, 1969, IMMUNOLOGIC THEORY A

[20] PHYSICAL CROSS-LINKING OF COLLAGEN-FIBERS - COMPARISON OF ULTRAVIOLET-IRRADIATION AND DEHYDROTHERMAL TREATMENT [J].

WEADOCK, KS ;

MILLER, EJ ;

BELLINCAMPI, LD ;

ZAWADSKY, JP ;

DUNN, MG .

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, 1995, 29 (11) :1373-1379

← 1 2 3 →