Carbon compounds in Apollo 11 lunar samples

Are they entrapped solar wind particles, meteoritic or cometary contributions, remnants of a primordial atmosphere or products of the degassing of the Moon ?     

Plasma triiodothyronine concentration in the newborn calf

Résumé On a mesuré le taux de triiodothyronine et de thyroxine dans le plasma du veau nouveau né pendant ses premiers 11 jours. Le ratio d T₃: T₄ a eu son maximum au 5^e jour.

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Acknowledgements. This work was supported by the Medical Research Council. The triiodothyronine antiserum was kindly provided by Dr.R. D. Hesch.     

Action of hyperoxia on hemolytic activity of the complement system]

Normobarie oxygen exposures momentarily raise by about 20% the haemolytic activity of the guinea pig complement likely by a rise of protein synthesis. About the end of this treatment the complement activity quickly decreases back to its initial value. Hyperbaric oxygen exposure immediately decreases the haemolytic activity. This shift might be result of a release in the serum of cytoplasmic elements bearing an anticomplementary activity or of an inactivation of the complement components involved in the stress reaction appearing in the treated animals. 2 days after the first exposure, during the resting phase, the complement rate increases by about 25% then decreases slowly back to normal.     

Isolation of a Soldado-like virus (Hughes group) fromOrnithodorus maritimus ticks in Ireland

Summary Three isolations of a virus of the Hughes group were obtained from seabird ectoparasites,Ornithodoros (Alectorobius) maritimus, on Great Saltee Island, Ireland. The agent is closely related to Soldado virus, originally obtained from related ticks near Trinidad, West Indies, and represents the second recorded tickborne arbovirus in Ireland.These investigations were supported in part by the Royal Irish Academy (Praeger Fund).     

4-Thiouridine and photoprotection in Escherichia coli K 12]

A high level of protection is observed in the Escherichia coli K 12 strain AB 1157 rec A 1 nuv+ whose transfer RNA contains 4-thiouridine. In contrast, the photoprotection level is low and observed at higher doses in a strain which differs from the former by a single mutation, nuv-, (lack of 4-thiouridine). This nucleoside is therefore an important chromophore leading to photoprotection. This conclusion is corroborated by the similarity of the action spectra for 8-13 link formation in tRNA and for photoprotection.     

Effects of inhibition and stimulation of Na+−K+ active transport on the resting membrane input conductance of the guinea-pig ventricle

Summary The effects of inhibition by ouabain and stimulation by high frequency drive of the sarcolemmal Na⁺–K⁺ active transport system on the resting input conductance (g_i) of guinea-pig ventricular muscles were determined. Although both pump inhibition and stimulation were associated with changes in electrophysiological properties of the muscles, neither had a significant effect on g_i.Supported by a grant from the North Carolina Heart Association.     

The growth of tumour allografts as a measure of the immunosuppressive potency of antilymphocyte sera

Zusammenfassung Die Wirkung von Kaninchen-anti-Maus-Lymphozytenserum auf das Wachstum von Tumorallotransplantaten kann in kleineren Tiergruppen leicht bestimmt werden, indem man das immunosuppressive Potential verschiedener Serumsätze prüft. Ein gutes Verhältnis zwischen dem durchschnittlichen Durchmesser von Tumortransplantaten am 14. Tag nach dem Implantat und die entsprechende, durchschnittliche, prozentuale Zunahme der Überlebenszeit der Hauttransplantate wird demonstriert.