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Biomedical subjects

L C Johnson

Publications and source records attributed to L C Johnson.

At least 91 records · Page 5Linked to original sources
PubMed1975

The effects of cosmic particle radiation on pocket mice aboard Apollo XVII: appendix II. Evaluation of oral, dental, and skeletal tissues.

A sparse neutrophilic leukocytic infiltrate was found in the gingival sulcus, both in the flight and the control animals, while no changes were observed in the palate. Mitoses in gingival and palatal tissues were in approximately equal numbers in all animal groups. The tongues of flight mice and controls contained areas characterized by vascular dilatation, separation of muscle bundles, and regressive and degenerative changes in muscle fibers. Mucous glands in the posterior part of the tongue of flight and control animals exhibited acinar distension. Also examined were the vertebral column; femur, knee joint, tibia and fibula of the right hindlimb; and the tracheal cartilages. No evidence of cosmic ray particle effects was found in any of these tissues.

Animals↗
PubMed1975

Effect of anabolic steroid treatment on endurance.

The effect of anabolic steriod treatment on maximum oxygen intake, mile run time, skin fold thickness, body weight, and elbow flexion and knee extension strength was studied. Twenty-one male college students, ages 19-33, engaged in an interval running program six days a week over a three week period. Each subject supplemented their diets with one half gram/kilogram of body weight of 90% protein powder. A double blind design was used for the administration of the steriod treatment with each of the subjects in the treatment group receiving six mg of stanozolol per day. Pre and post treatment tests were administered for each of the dependent variables. There was improvement at the .05 level in the oxygen uptake of both treatment and control groups. For the other dependent variables, the differences between pre-treatment and post-treatment values were not statistically significant. Differences between the steroid and the control groups were not statistically significant for any of the dependent variables. When young male adults are engaged in an endurance training program, steroid treatment does not appear to have any effect on the development of endurance or strength, or on the percent of body fat,

Adult↗