EEG synchronization produced by peripheral nerve stimulation

Riassunto La stimolazione a 3–8/sec di nervi cutanei e muscolari, eseguita in gatti integri non anestetizzati, produce una sincronizzazione dell'attività elettrica cerebrale. La soglia per questa risposta corrisponde in media a 0,4–0,9 volte l'intensità minima di corrente che applicata allo stesso nervo e in analoghe condizioni sperimentali produce la reazione di risveglio.

---

---

This investigation was supported by PHS research grant B-2990 from the National Institute of Neurological Diseases and Blindness, N.I.H., Public Health Services, U.S.A.     

The importance of autoplastically transplanted pituitaries for survival and for regeneration of adultTriturus

Résumé Une hypophyse greffée autoplastiquement dans la chambre antérieure de l'il, dans lemanus ou dans letarsus s'est avérée capable de remplacer l'hypophysein situ dans son action sur la régénération et la survie chez le Triton, à condition que s'établisse une vascularisation satisfaisante du greffon et que la durée de l'expérience ne dépasse pas plusieurs mois.     

Purification of a nuclease from human serum

Summary The purification procedure for a nuclease from human serum is described. It includes ammonium sulfate precipitation, chromatography on DEAE-Sephadex and on Sephacryl-S 200, and preparative electrophoresis. The enzyme, purified about 2000-fold, is homogeneous in a sodium dodecyl sulfate electrophoretic system, where it has a mol. wt of 78,000. The pH optimum lies around pH 6.5; it is a sugar-nonspecific endonuclease.Acknowledgment. This work has been supported by a research grant from Stiftung Volkswagenwerk through the Akademie der Wissenschaften und der Literatur, Mainz. We thank Mrs R. Nehrbass and Mrs C. Wolpert for technical assistance.