Intrasubspecific sex chromosome polymorphism in theBandicota bengalensis bengalensis (Gray) collected from India

Résumé Des préparations de moëlle osseuse ont permis d'établir le mombre diploïde (2N=42) et le nombre fondamental (NF=52) deBandicota b. bengalensis (Gray), les spécimens étudiés appartement à trois populations distinctes (Rohru, Varanasi, Belonia, Indes). Le nombre et la forme des autosomes sont les mêmes dans les trois échantillons alors que l'X peut être acrocentrique ou submétacentrique; L'Y est petit et submétacentrique.     

Effects of monosodium glutamate on circulating concentrations of luteinizing hormone and growth hormone in young growing domestic fowl (Gallus domesticus)

Summary The administration of monosodium glutamate (MSG) at a dose of 4 g/kg in 5-day-old fowl or 5 daily injections of MSG (total dose 20 g/kg) in 1- to 5-day-old fowl did not affect body growth in either male or female domestic fowl. Neither MSG treatment schedule affected either testis weight or the circulating concentration of luteinizing hormone (LH). A small, but significant decrease in the plasma concentration of growth hormone (GH) was observed in female chicks which had received daily MSG injections.Acknowledgments. Paper of Journal Series, New Jersey State Experiment Station, project No. 18141 and 18443, supported by State and Hatch Act funds and grants from the National Science Foundation (PCM 80227227) and the Upjohn Company.     

Effects of precocene II and juvenile hormone III on the activity of neurosecretory A-cells inOncopeltus fasciatus

Summary Application of precocene II, topically or by contact method, appears to inhibit the synthetic activity of neurosecretory A-cells of the pars intercerebralis ofOncopeltus fasciatus. Treatment of precocene-treated insects with JH III apparently stimulates the secretory activity of these cells.Supported by National Research Council of Canada grant No. A4669.We thank Dr G. B. Staal, Zoecon Corporation, Palo Alto, California, for the gift of precocene II.     

Comparison of the localization of several muscle proteins in relaxed and contracted myofibrils.

The localization of several muscle proteins in relaxed and contracted myofibrils is compared. The morphology of the myofibrils and the behavior of these proteins was also investigated under extraction conditions.     

Modification of clonazepam anticonvulsive activity by its association with other anti-epileptic drugs

Summary The modification of the anti-epileptic activity of clonazepam by other anticonvulsivants is studied. The results vary according to the drug and technique used. The usefulness of the 2 techniques employed is discussed.