Effects of physiological levels of thyroxine in vivo on respiration and phosphorylation in rat liver fractionsAmerican Physiological Society - Tập 197 Số 2 - Trang 370-376 - 1959
Alan S. Fairhurst, Jane Roberts, Robert E. Smith
Liver mitochondrial systems of varying heterogeneity with respect to microsomal-soluble components were isolated from thyroidectomized and normal rats given l-thyroxine at various dose levels (0, 3, 10, 30, 100, 500 and > 500 µg daily) for 14 days. Degree of homogeneity of fractions was checked by electron and light microscopy. Determinations were made as functions of fraction and thyr...... hiện toàn bộ
Rigor and resistance to stretch in vertebrate smooth muscleAmerican Physiological Society - Tập 231 Số 5 - Trang 1509-1514 - 1976
Butler Tm, MJ Siegman, Davies Re
Depletion of the APT content of the rabbit taenia coli muscle to 0.07 mumol/g caused an increase in force equal to 11% of maximum active tension (Po) when the muscle was bathed in a calcium-containing Krebs solution at 21 degrees C, but no increase in force in a calcium-free solution. Stimulation of the muscle in calcium-containing medium during the loss of ATP increased the force maintai...... hiện toàn bộ
Secretion of calcium by rat submandibular glandAmerican Physiological Society - Tập 196 Số 3 - Trang 645-648 - 1959
Robert H. Dreisbach
The mean concentration of calcium in rat submandibular gland saliva after maximal pilocarpine stimulation was initially 3.2 µEq/gm and gradually fell during the 1st hour to 0.93 µEq/gm. The final concentration was approximately 30% of the concentration of calcium in the serum ultrafiltrate whether the total serum calcium was normal or elevated threefold by the infusion of calcium chloride...... hiện toàn bộ
Effect of body weight and sex on activity of enzymes involved in amino acid metabolismAmerican Physiological Society - Tập 196 Số 2 - Trang 303-306 - 1959
Edmund C.C. Lin, Richard S. Rivlin, W. Eugene Knox
The total body activities of four transaminases and two oxidases concerned with aromatic amino acid metabolism were studied in five species of mammals of varying size to test for correlations between total body enzyme activity and body weight. It was found that as a general rule the following expression was obeyed: enzyme x weight k = constant (the weight parity expre...... hiện toàn bộ