Surface area and effect of drying temperature related to dry weight of jejunal tissue in rat

Zusammenfassung Es werden Gleichungen angeführt, die eine Abschätzung der Oberfläche des Rattenjejunums aus Trockengewichtsbestimmungen erlauben. Sollte sich eine Trocknung des Gewebes bei Temperaturen über 100°C als unmöglich erweisen, ist anzuraten, eine Trocknung bei 80°C für nicht weniger als 48 h oder Gefriertrocknung über Nacht auszuführen; hierbei werden gleiche Resultate erzielt.     

Lithium effects upon components of activity in rats

Summary When lithium chloride was administered to rats several changes occurred in a number of components of activity, some of which were sex-related. There was a reduction in both ambulatory and rearing activity and in behaviour associated particularly with the mouth and nose. The findings are related to a suggestion that lithium effects on behaviour may be more subtherthan hitherto thought.     

Influence of pinealectomy on serum estrogen and progesterone levels in blind-anosmic female rats

Summary Previous studies show that the suppression of gonadal function in blind-anosmic rats is dependent on the pineal gland. The present results demonstrate that in young female rats both the pineal gland and dual sensory deprivation have additional independent antigonaldal effects.This work was partially supported by state institutional funds and by NSF grant No. PCM 74-06276-276-A02. The radioimmunoassays of the steroids were carried out with the aid of the Radioimmunoassay Core which is supported by USPHS grant No. 1T30 HD-10202. We also thank Constance Stahl for typing assistance.     

Intracellular pH and activation of sea urchin eggs after fertilisation.

The intracellular pH of the sea urchin embryo increases 0.3 pH units between 1 and 4 min after fertilisation. The increase in pH is required for initiating development. The increase results from an exchange of extracellular Na+ for intracellular H+.