VISCOELASTIC CREEP OF COLLAGENOUS TISSUE
VISCOELASTIC CREEP OF COLLAGENOUS TISSUE
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DOI：
10.1016/0021-9290(76)90002-6
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发表时间：
1976-01-01
影响因子：
2.4
通讯作者：
MCCRUM, NG
中科院分区：
文献类型：
--
作者：
COHEN, RE;HOOLEY, CJ;MCCRUM, NG
在10 - 60 ℃之间的温度下，体外研究了人指肌腱蠕变的温度和应力依赖性。C和拉伸应变低于2%。粘弹性变形机制的活化能Δ H通过在蠕变期间对试样施加小的、突然的温度变化来确定。在28 ° C下的Δ H值为C为12（. ±. 1.5)kcal mol-1，来自年龄为21、55和89岁供体的样本。使用类似的技术，在人的手指肌腱的收缩转变的激活能被确定为250千卡/摩尔。等时应变率的应力依赖性可以用数学方法确定。所观察到的粘弹性现象进行了讨论的胶原组织的结构。本文还讨论了蠕变T-跳跃技术在生物高分子研究中的优势。
The temperature and stress dependence of creep of human digital tendon was studied in vitro at temperatures between 10-60.degree. C and at tensile strains below 2%. The activation energy, .DELTA.H, for the viscoelastic deformation mechanism was determined by imposing small, abrupt changes in temperature on the specimen during creep. The value of .DELTA.H at 28.degree. C was 12 (.+-. 1.5) kcal mol-1 for specimens from donors of age 21, 55 and 89 yr. The activation energy for the shrinkage transition in human digital tendon was determined as 250 kcal/mole using similar techniques. The stress dependence of the isochronal strain rate can be determined mathematically. The observed viscoelastic phenomena are discussed in terms of the structure of the collagenous tissue. The advantages of the creep T-jump technique for the study of biological polymers are also discussed.