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Contact radical ion-pairs of ammonium and fluoro-substituted ketones were generated in photochemical systems and their here-to-fore elusive esr spectra were characterized.

Article de synthese sur le piegeage et l'identification de radicaux organometalliques transitoire. Etude de ces especes intermediaires, formant des composes d'addition paramagnetiques, generees par reactions photochimiques de composes organometalliques avec des quinones, cetones, dicetones et des metaux carbonyles

A 35-year-old male uremic patient developed the classical presentation of Reiter's syndrome after 3 years of regular hemodialysis. He had painful swelling of the left knee, sacroilitis, urethritis, balanitis, painless oral ulcers, acute uveitis and positive HLA-B27. Disease activity persisted and was aggravated although immune function studies showed depressed cellular immunity. The clinical course of this patient seemed to contradict our belief that activity of immunologically mediated disease will abate after uremia, but it concurred with the report that Reiter's activity was unchanged in AIDS despite the significant immunodeficiency of AIDS patients.

Potentiation of the antibody response to inactivated bovine viral diarrhea virus by immunological adjuvants was studied in guinea pigs and cattle. The inactivated bovine viral diarrhea virus alone was demonstrated to be a weak immunogen. Addition of either 2 mg per mL diethylaminoethyl-dextran or 5% alhydrogel to inactivated bovine viral diarrhea virus did not or only slightly stimulated the antibody response; the combined adjuvants induced a significantly higher titer. A higher concentration (20 mg per mL) of diethylaminoethyl-dextran, on the contrary, suppressed the immune potentiation by the dual adjuvants. Combination of Bordetella bronchiseptica and alhydrogel adjuvants stimulated a high titer of antibody. The titer was further elevated upon revaccination and was significantly higher than that induced by alhydrogel alone. In cattle, alhydrogel enhanced the immune response and the additional inclusion of diethylaminoethyl-dextran did not cause a significant potentiation of the immunity. However, the antibody decay rate was significantly slower when stimulated by the combined adjuvants.

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Etude des ecoulements dans des cavites rectangulaires remplies d'eau lorsqu'on applique un gradient de temperature horizontal. Mesure, par anemometrie laser Doppler, de la distribution de vitesse horizontale. Observations par interferometrie