Age-Related Changes in Penile Erections and Circulating Testosterone in Middle-Aged Male Rats

1978 ◽  
pp. 149-158 ◽  
Author(s):  
Gary D. Gray
Keyword(s):  
Male Rats ◽  
Middle Aged ◽  
Age Related ◽  
Penile Erections ◽  
Age Related Changes ◽  
Middle Aged Male

Genistein Increase Thyroid Hormone and 7 alpha-hydroxycholesterol concentrations in the liver of middle-aged male rats

2018 ◽  
Author(s):  
Branka Sosic-Jurjevic ◽  
Dieter Lutjohann ◽  
Dragana Miljic ◽  
Jasmina Ciric ◽  
Svetlana Trifunovic ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Male Rats ◽  
Middle Aged ◽  
Middle Aged Male

Perceptions of Sex Roles of Young and Middle-Aged Women and Men

1982 ◽  
Vol 55 (2) ◽  
pp. 559-562
Author(s):  
Claire Etaugh ◽  
Sharon Weber
Keyword(s):  
College Students ◽  
Sex Roles ◽  
Sex Role ◽  
Middle Aged ◽  
Age Related ◽  
Aged Woman ◽  
Male College ◽  
Middle Aged Woman ◽  
Age Related Changes ◽  
Female Subjects

48 female and 48 male college students used the Bern Sex-role Inventory to describe either a young or middle-aged woman or man. Female subjects perceived that women become increasingly feminine and less androgynous with age. No age-related changes were perceived in men's sex-role behaviors.

A model to assess age-related changes in two-point discrimination of plantar skin

1999 ◽  
Vol 89 (8) ◽  
pp. 383-391 ◽  
Author(s):  
W Lynch ◽  
J Mooney
Keyword(s):  
Older Adults ◽  
Statistical Analysis ◽  
Linear Relationship ◽  
Middle Aged ◽  
Discrimination Accuracy ◽  
Discrimination Ability ◽  
Fixed Distance ◽  
Age Related ◽  
Older Subjects ◽  
Age Related Changes

A device was constructed to assess two-point discrimination in the plantar skin of younger, middle-aged, and older adults. The device consisted of paired filaments, each delivering a tip force of 4.56 log units (equivalent to 3.63 g), at a fixed distance apart. Statistical analysis showed significant differences in two-point discrimination accuracy between these groups of subjects. Younger subjects showed greater accuracy of plantar two-point discrimination than either middle-aged or older subjects, with an apparent inverse linear relationship between subject age and plantar two-point discrimination ability. A model to assess age-related changes in two-point discrimination is presented.

Circulating hyaluronan levels in the rodent: effects of age and diet

1995 ◽  
Vol 268 (4) ◽  
pp. C952-C957 ◽  
Author(s):  
J. Yannariello-Brown ◽  
S. H. Chapman ◽  
W. F. Ward ◽  
T. C. Pappas ◽  
P. H. Weigel
Keyword(s):  
Fish Meal ◽  
Caloric Intake ◽  
Protein Source ◽  
Male Rats ◽  
Semisynthetic Diet ◽  
Fischer 344 ◽  
Age Related ◽  
Old Rats ◽  
Ad Libitum ◽  
Age Related Changes

Circulating hyaluronan (HA) levels were investigated as a function of age and diet in Fischer 344 male rats. A biphasic pattern of age-related changes was observed in rats fed ad libitum a diet in which the protein source was soya/fish meal. HA levels in 3- to 6- and 22- to 29-mo-old rats were not statistically different. However, HA levels in 12- to 20-mo-old rats were 10-29% of the levels in younger or aged adults. HA levels were also measured in rats fed ad libitum a semisynthetic diet in which the protein source was hydrolyzed casein. Whereas the two colonies exhibited similar biphasic age-related changes, HA levels differed 4- to 20-fold at every age examined. Caloric restriction affected HA levels in 19-mo-old casein-fed rats; HA levels were 2.3 times higher than age-matched controls and were not statistically different from young or aged animals. Serum and plasma HA levels were identical in the same individuals at all ages tested. These data suggest that HA turnover and metabolism in the rat are affected by age, dietary composition, and caloric intake.

Effect of aging on tracheal mucociliary clearance in beagle dogs

1987 ◽  
Vol 62 (3) ◽  
pp. 1331-1334 ◽  
Author(s):  
S. L. Whaley ◽  
B. A. Muggenburg ◽  
F. A. Seiler ◽  
R. K. Wolff
Keyword(s):  
Young Adult ◽  
Gamma Camera ◽  
Mucociliary Clearance ◽  
Age Groups ◽  
Beagle Dogs ◽  
Velocity Measurements ◽  
Middle Aged ◽  
Age Related ◽  
Age Related Changes ◽  
Made In

Tracheal mucous velocity measurements were made in 24 beagle dogs in five age groups, using a gamma camera to detect movement of instilled 99mTc-macroaggregated albumin. Age groups were defined as immature (9–10 mo), young adult (2.8–3.0 yr), middle aged (6.7–6.9 yr), mature (9.6–9.8 yr), and aged dogs (13.6–16.2 yr). Mean velocities were 3.6 +/- 0.4 (SE) mm/min in the immature dogs, 9.7 +/- 0.6 mm/min in the young adults, 6.9 +/- 0.5 mm/min in the middle-aged dogs, 3.5 +/- 0.8 mm/min in the mature dogs, and 2.9 +/- 0.5 mm/min in the aged dogs. Tracheal mucous velocity was significantly (P less than 0.05) greater in the young adult and middle-aged groups compared with the immature, mature, and aged dogs. This pattern of age-related changes was noted to be similar to age-related changes described for certain pulmonary function measurements.

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