Regulation of ammonia uptake inAspergillus nidulans

Summary The ammonia uptake inA. nidulans was found to be linear for about 20 min, and was proportional up to 1.5 mg/ml dry cell density. The transport of ammonia does not involve energy. Normal and biotin deficientA. nidulans showed an identical K_m-values of 10.26×10^–5 M ammonia for uptake. The uptake of ammonium ion has been shown to be regulated by the intracellular concentration of ammonia.Acknowledgment. The award of research fellowship by the Govt of India, Department of Atomic Energy, Bombay, to JDD is acknowledged.     

Agglutinating antibrain antibodies in dogs with experimental allergic encephalomyelitis

Résumé Chez 19 chiens présentant des symptomes de EAE, on a trouvé des anticorps sériques anticerveaux pendant divers laps de temps.     

Effect of serum gonadotropin on testis in ascorbic acid deficient guinea-pigs

Résumé La dégénération des testicules de cobayes manquant d'acide ascorbique a pu être corrigée par l'administration du sérum gonadotropin.     

Changes of glutamine,glutamic acid and GABA in cortical and subcortical brain structures of hibernating and fully aroused ground squirrels (Citellus citellus)

Résumé On étudie ici la teneur en glutamine, en acide glutamique et en GABA dans des différentes parties du cerveau chez le Spermophile en sommeil hivernal profond et après le réveil de l'hibernation. Les changements les plus remarquables de l'acide glutamique et du GABA ont été constatés dans les structures sous-corticales regardées comme essentielles pour la régulation de ces processus physiologiques coordonnés.     

Responses evoked by stimulation of the acoustic pathway during the sleep-wakefulness cycle

Riassunto Lo studio delle risposte evocate nelle radiazioni acustiche e nelle arec acustiche primarie da stimolazione delle vie uditive centrali dimostra che: (a) la trasmissione degli impulsi ascendenti a livello del corpo genicolato mediale è facilitata sia durante il sonno profondo che al risveglio mentre, (b) l'eccitabilità corticale è maggiore durante il sonno leggero.

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Part of these results has been presented at a meeting of the Società italiana di Biologia sperimentale, held in Genova on July 30, 1964.     

Surface tension of cell types in differentiating CNS of chick

Zusammenfassung Es wird gezeigt, dass die Oberflächenspannung von Neuroblasten sich mit zunehmender Differenzierung ändert. Es kann ein kraniokaudaler Entwicklungsgradient nachgewiesen werden.