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See detailAnalyse et purification de l'actinomycetine par absorption
Ghuysen, Jean-Marie ULg; Welsch, Maurice

in Comptes Rendus des Séances de la Société de Biologie et de ses Filiales (1952), 146(21-22), 1812-1815

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See detailL'activité staphylolytique de l'actinomycétine
Ghuysen, Jean-Marie ULg

in Comptes Rendus des Séances de la Société de Biologie et de ses Filiales (1952), 146(15-16), 1268-1271

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See detailAstrophysics: 1951
Swings, Polydore ULg

in Leaflet - Astronomical Society of the Pacific (1952), 6(273), 178-188

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See detailThe Spectra of Comets 1950b (Minkowski) and 1951a (Pajdusakova).
Swings, Polydore ULg; Page, Thornton

in Astrophysical Journal (1952), 115

The spectrum of Comet 1950b at heliocentric distance 2.65 A.U. shows a strong solar continuum concentrated in the nucleus and CN emission over a coma forty times larger. Comet 1951a at heliocentric ... [more ▼]

The spectrum of Comet 1950b at heliocentric distance 2.65 A.U. shows a strong solar continuum concentrated in the nucleus and CN emission over a coma forty times larger. Comet 1951a at heliocentric distance 0.91 A.U. is very unusual in showing a strong nuclear continuum and extremely weak CN emission over a coma only eight times larger than the nucleus. The former seems normal for a comet distance from the sun; the latter is probably a "fresh" comet, newly arrived near the sun from the swarm of cometary material postulated by Oort at the outer confines of the solar system. [less ▲]

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See detailHydrates de gaz dans les noyaux cométaires et les grains interstellaires
Delsemme, A.-H.; Swings, Polydore ULg

in Annales d'astrophysique (1952), 15(1), 1-6

Solid hydrates of CH4, CO2, ... may be present in cometary nuclei and interstellar grains. The vapor pressures — hence the rates of sublimation — of the various hydrates are of the same order of magnitude ... [more ▼]

Solid hydrates of CH4, CO2, ... may be present in cometary nuclei and interstellar grains. The vapor pressures — hence the rates of sublimation — of the various hydrates are of the same order of magnitude while the vapor pressures of solid CH4, H2O, ... differ by very large factors. The relative abundances of the radicals which are observed in comets would be explained more satisfactorily by assuming the presence of solid hydrates. [less ▲]

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See detailSuggestions for new photoelectric observations of the zodiacal light and the counterglow
Swings, Polydore ULg

in L'étude optique de l'atmosphère terrestre : communications présentées au colloque international tenu à l'Institut d'Astrophysique de l'Université de Liège, les 3 et 4 septembre 1951 (1952)

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See detailLes spectres de treize nébuleuses planétaires et de leurs noyaux
Swings, Polydore ULg; Swensson, J.-W.

in Annales d'astrophysique (1952), 15

New observational data on the spectra of thirteen planetary nebulae and their nuclei are given. New nuclei of the WOLF-RAYET type containing both nitrogen and carbon have been found. Previously adopted ... [more ▼]

New observational data on the spectra of thirteen planetary nebulae and their nuclei are given. New nuclei of the WOLF-RAYET type containing both nitrogen and carbon have been found. Previously adopted WOLF-RAYET designations have been modified. Nuclei of planetary nebulae, despite their occasional resemblance to WOLF-RAYET stars, should not be associated with the latter. [less ▲]

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See detailThe spectrum of Nova DQ Herculis (1934) in 1950.
Swings, Polydore ULg; Jose, P.-D.

in Astrophysical Journal (1952), 116

Seven spectrograms of Nova DQ Herculis obtained in May and October, 1950, reveal that the striking changes in the spectrum of the nebulosity observed between 1942 and 1949 continue, while the mean ... [more ▼]

Seven spectrograms of Nova DQ Herculis obtained in May and October, 1950, reveal that the striking changes in the spectrum of the nebulosity observed between 1942 and 1949 continue, while the mean velocity of expansion remains practically the same as in previous years. [less ▲]

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See detailIntroduction
Swings, Polydore ULg

in L'étude optique de l'atmosphère terrestre : Communications présentées au colloque international tenu à l'Institut d'Astrophysique de l'Unversité de Liège les 3 et 4 septembre 1951 (1952)

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See detailRadiations cométaires inexpliquées
Swings, Polydore ULg

in La physique des comètes : communications présentées au quatrième colloque international d’astrophysique (1952)

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See detailLa voie étoilée
Campus, Ferdinand ULg

Speech (1952)

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