Testosterone,epitestosterone and androstenedione in the pollen of scotch pineP. silvestris L.

Zusammenfassung Im Pollen vonPinus silvestris L. wurden die androgenen Steroide Testosteron, epi-Testosteron und 4-Androsten-3,7-dion nach vier verschiedenen Methoden bestimmt.     

Variations in the glycosidic pattern of anthocyanins

Zusammenfassung Neun Glykoside des Pelargonidins wurden durch papierchromatographische Methoden gekennzeichnet. Es war notwendig, die Methode der Zuckeridentifizierung abzuändern, um die Bildung des Kunstprodukts Arabinose zu vermeiden. Einige der neun Glykoside gehören zu neuen Sorten von Anthocyanidinglykosiden, die bisher noch nicht in der Natur entdeckt waren. Die dadurch erklärte Variation im Glykosidformelbild der Anthocyane wird in bezug auf ihre Biosynthese diskutiert.

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Part I: Nature179, 429 (1957).     

Distribution of histamine in 7 brain regions in different species and strains of mammals

Resumen En las especies estudiadas el hipotálamo es la región mas rica en histamina (HT). En la rata, la mayor proporción de HT se localiza en el sedimento de los homogenizados en medio isotónico centrifugados a 10⁵×g; la proporción de HT en el sedimento varia ampliamente de una región a otra.     

Variations in DNA content

Summary DNA content in the active nuclei of various plant organs varies from organ to organ. The amount of DNA in the shoot tip is the least, as compared to that of other organs. The amplification of DNA in the differentiation of organs from the shoot meristem has been suggested.     

Morphometric divergence of Robertsonian populations/species ofMus: A multivariate analysis of size and shape

Summary The morphological divergence of Robertsonian populations from the Rhaetian Alps (2n=26, 2n=24 and 2n=22) was investigated by multivariate analysis of shape components of the mandible and scapula. These shape components were obtained by a specifically designed multivariate procedure that detects and negates variation in general size. Whilst allozymes frequencies fail to effectively distinguish between Robertsonian populations the above multivariate morphometric procedures showed that the Robertsonian populations are clearly morphometrically distinct and that this morphometric divergence is cladistically congruent with the chromosomal evolution. Given appropriate comparative material, the karyotype of a mouse from these populations can be predicted from the shape of its mandible.     

Transplantation of brain tissue in the brain of adult rats

Summary Brain tissues obtained from rat embryos were transplanted in the forebrain and/or cerebellum of the adult rats. The transplants survived, grew and achieved normal cellular and cytoarchitectural differentiation. They had become anatomically integrated with the host brain. The animals did not show any obviously detectable abnormal behavior or pathology of the brain. The transplants survived as long as the animals did suggesting that they had become a part and parcel of the host brain.Supported by research grants NS-08817 and CA-14650 from N.I.H.