Effects of prenatal litter size in inbred mice on morphometric characters with different developmental patterns [0.03%]
不同发育模式形态测量特征的 prenatal 生活环境效应
L Leamy,Z Zhang
L Leamy
Prenatal litter size effects were assessed in two inbred, cross-fostered strains of house mice (A/J and C57BL/10J) in order to see whether they differed among morphometric characters with different developmental histories. Three characters ...
Comparative Study
Growth, development, and aging : GDA. 1993 Spring;57(1):13-23. DOI: 1993
Origin of the avian glycogen body. II. Observations in support of a glial nature in the chick embryo [0.03%]
鸟类糖原体的起源 II. 小鸡胚胎中支持其神经胶质特性的观察现象
L D De Gennaro
L D De Gennaro
Stem cells of the glycogen body in chick embryos at 7-8 days of incubation (stages 31-34) were studied by light microscopy autoradiography, immunocytochemistry, and following induced spina bifida to discern their nature and origin. Glycogen...
Are somatic cells inherently deficient in methylation metabolism? A proposed mechanism for DNA methylation loss, senescence and aging [0.03%]
体细胞甲基化代谢缺陷假说—关于DNA去甲基化的机制、衰老及衰老相关疾病的假设
C A Cooney
C A Cooney
A mechanism of aging is proposed for mammals and other vertebrates. In this mechanism, most somatic cells have inherent deficiencies in methylation metabolism with respect to their capacity to methylate DNA. This leads to incomplete DNA met...
M J Armstrong,D Janick-Buckner,N Harvey et al.
M J Armstrong et al.
Chimeric mice provide a unique approach to the analysis of genetic factors associated with aging since cells with two genetically distinct backgrounds can be analyzed in the same animal. In this study, bone marrow chimeras were produced by ...
The costs of reproduction and dietary restriction: parallels between insects and mammals [0.03%]
昆虫和哺乳动物生殖成本与饮食限制的相似性
J L Graves
J L Graves
Dietary restriction increases life span in mammals. This essay connects the dietary restriction response to evolutionary life history theory and experiments related to it. Evolutionary biologists have shown mathematically that aging is an i...
Food efficiency in rats following brain lesions which affect target body size: implications on the set point for target size [0.03%]
影响目标体重的脑损伤后大鼠的食物利用效率：对目标体质量设定点的影响
H D Mosier,F M Crinella,J Yu et al.
H D Mosier et al.
Target size, i.e. body size appropriate for age, may be reset by bilateral lesions of several brain areas. The mechanism for control of target body size is unknown, but some of the loci have marked effects on gustatory behavior and/or energ...
Comparative Study
Growth, development, and aging : GDA. 1993 Winter;57(4):223-31. DOI: 1993
Alteration of tissue levels of 13C in pigs by natural abundance 13C labeling of diets [0.03%]
用饮食中天然存在的13C进行标记而改变猪的组织中的13C含量
A D Mitchell,N C Steele,P E Hare
A D Mitchell
A study was conducted to determine the feasibility of using differences in the natural abundance of dietary 13C as a means of in vivo labeling. Four female pigs were fed a C3 plant diet (barley, soybean meal and alfalfa) and four were fed a...
Food restriction postpones, not prevents, exercise-induced growth in hamsters [0.03%]
运动引起的仓鼠生长停止与食物限制的关系的研究
C A Conn,S Mial,K T Borer
C A Conn
Voluntary exercise during ad libitum feeding accelerates growth in mature female hamsters. If food is restricted during the exercise period, growth is suppressed, but ad libitum access to food at the cessation of exercise permits rapid catc...
Multiphasic allometry [0.03%]
多相几何异速生长定律
W J Koops,M Grossman
W J Koops
A multiphasic linear model is presented that describes the allometric relation between body components and permits a smooth transition from one linear segment to the next. Three applications of a diphasic linear model to allometric growth p...
C Vogl,W R Atchley,D E Cowley et al.
C Vogl et al.
We studied the epigenetic effect of growth hormone using mice that were transgenic for a sheep metallothionein 1a-sheep growth hormone, which was expressed beginning at 21 days postnatal age. The impact of exogenous growth hormone (GH) on v...