GOLDSTEIN, LEON Ammonia metabolism in kidneys of suckling rats. Am. J. Physiol. 220( 1) : 213-217. 1971.-The response of renal ammonia excretion to an acid load was significantly less in rats l-2 weeks old than in adults. A response similar to that observed in adults appeared between 14 and 16 days after birth. General functional differentiation of the nephron, judged by the ability of isolated...

19 juvenile members of known genealogies in two wild baboon groups were studied over a 16month period. Males and females in two age classes were compared regarding third-party aggression and support given and received during agonistic interaction. Young juvenile males and females (1-2.5 years-old) were supported predominantly by their probable fathers. The adult males supported without regard t...

We hypothesized that the conditioned muscles of elderly organisms have different responses to electrical stimulation than that of young adult organisms. One-year-old sheep and eight-year-old elderly sheep were used for this investigation. Results. The latissimus dorsi muscle (LDM) of old sheep has less fatigue resistance than LDM of younger animals. In all animals, LDH-5 fractions decreased aft...

The present study aimed to analyze the morphology of the peripheral nerve, postsynaptic compartment, skeletal muscles and weight-bearing capacity of Wistar rats at specific ages. Twenty rats were divided into groups: 10 months-old (ADULT) and 24 months-old (OLD). After euthanasia, we prepared and analyzed the tibial nerve using transmission electron microscopy and the soleus and plantaris muscl...

a 45 year old farmer from espand village (located in the west of iranshahr county, sistan and baluchistan province, southeastern of iran) with some clinical manifestations referred to the khatam-al-anbia hospital in the city of iranshahr. ct scan showed an extensive edema in nasal and para nasal sinuses. endoscopy consideration revealed the presence of numerous larvae lodged inside the nasal ca...

Inferior temporal cortex is necessary for visual object recognition in adult primates but is less critical in infants. Nonetheless, in macaques as young as 6 weeks old, inferior temporal neurons showed adult-like visual response properties, including form selectivity and bilateral receptive fields, indicating that extended maturation and visual experience may not be necessary for adult-like enc...

During ozone (O(3)) exposure, adult rats decrease their minute ventilation (VE). To determine whether such changes are also observed in immature animals, Sprague-Dawley rats, aged 2, 4, 6, 8, or 12 wk, were exposed to O(3) (2 ppm) in nose-only-exposure plethysmographs. Baseline VE normalized for body weight decreased with age from 2.1 +/- 0.1 ml. min(-1). g(-1) in 2-wk-old rats to 0. 72 +/- 0.0...

We reported final height data of collected 28 cases with Turner Syndrome (TS) were confirmed chromosomal analysis during growth hormone therapy and late estrogen therapy. Participants allocated into one 3 Groups, Group A: 11 patients aged between 15-18 years-old, group B: 10 -15 C: 7 younger than years-old. In contrast to the duration & presentation, B showed a significantly higher mean (14...

The purpose of this study was to investigate the effects of mild therapeutic exercise (treadmill) in preventing the inactivity-induced alterations in contractile properties (e.g., power, force, and velocity) of type I soleus single fibers in three different age groups. Young adult (5- to 12-mo-old), middle-aged (24- to 31-mo-old), and old (32- to 40-mo-old) F344BNF1 rats were randomly assigned ...