ABSTRACT
Continuing investigation of pineal gland function indicates that the anti-gonadotrophic activity of this organ cannot be attributed solely to the postulated hormone melatonin, the concentration of which is negligible in the pineal body compared to quantities required to produce unequivocal physiological effects. A non-melatonin antigonadotrophic substance recently isolated from bovine pineal glands was further purified by organic solvent extraction, ultrafiltration and gel filtration. Studies of partial blockage of compensatory ovarian hypertrophy in unilaterally ovariectomized Charles River CD-1 mice indicated that this substance is significantly more potent than melatonin in this test system.
The activities of the American Memory Library, aimed at on activization of children’ reading interests in Germany are considered. The history, the collection composition, the material and technical basis and the organization of library space, as well as the usage of new information technologies in children's libraries of Germany are illuminated.
