[Some mechanical properties of the pig aorta (author's transl)].

In a machine for tensile tests the ultimate strength, stress and strain of the aorta ascendens of 47 female pigs (German landrace) at three different regions of the vessel wall were determined. The animals were fattened under identical conditions in a progeny testing station and slaughtered at the same living weight (102 +/- 2 kg). Weak regressions of body weight and age on parameters measured were nevertheless accounted for.

Relation between individual differences in sexual behavior and plasma testosterone levels in the guinea pig.

After 3 tests for male sex behavior, adult male guinea pigs were classified as either low-activity (LA, no ejaculations) or high-activity (HA, ejaculation during at least 2 behavior tests). In one experiment, resting levels of peripheral plasma testosterone (T), measured by radioimmunoassay, did not differ between the groups (LA=2.22 +/- 0.

Relation of uptake and metabolism of (1,2,6,7-3H)testosterone to individual differences in sexual behavior in male guinea pigs.

Male guinea pigs were given 3 tests for sexual behavior. Animals that never ejaculated were classified as low activity (LA), animals that ejaculated on one test were classified as medium activity (MA), and animals that ejaculated on two or more tests were classified as high activity (HA). Subsequently, animals from each group were castrated and given an s.

[Mineral contents of the blood and chemical composition of the muscles of trichinella-infected piglets (author's transl)].

Three piglets of 22 kg were infected each with 10 larvae of Trichinella spiralis per g body weight. In the blood plasma the contents of several electrolytes were measured twice per week to day 45 post infection (p.i.

Role of monoamines in sexual behavior of the female guinea pig.

Ovariectomized guinea pigs, rendered sexually receptive by injections of estradiol benzoate and progesterone, were treated with drugs that are known to affect monoamine receptor activity. Treatment with the dopamine receptor stimulant apomorphine or the serotonin agonist LSD resulted in a suppression of lordosis behavior that lasted for several hours. The noradrenergic receptor stimulant chlonidine potentiated the performance of lordosis (i.