References of "Bulletin de la Classe des Sciences. Académie Royale de Belgique"
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See detailExamen à grande dispersion d'un cas typique de multiplet de résonance de la vapeur diatomique de soufre
Swings, Polydore ULg; Legros, A.

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1931), XVII(6), 808-811

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See detailSur les nombres quantiques de rotation des doublets de résonance du soufre
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1931), XVII(7), 972-974

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See detailSur les intensités des composantes des doublets de rotation dans le spectre de résonance du soufre
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1931), XVII(7), 956-970

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See detailSur la perméabilité des verres aux radiations ultra-violettes
Gilard, P.; Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1931), XVII(2), 235-248

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See detailNote sur une méthode de photométrie stellaire basée sur la mesure de l'opacité des traînées photographiques
Dehalu, M.; Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1929), XV(10), 746-748

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See detailSur l'intégration de l'équation des orbites quasi képlériennes par la méthode des approximations successives
Swings, Polydore ULg; Bureau, Florent J.

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1929), XV

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See detailSur une méthode simple de détermination de l'absorption des verres dans la région ultra-violette du spectre
Swings, Polydore ULg; Gilard, P.

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1929), XV(10), 749-755

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See detailObservation de Jupiter faites à l'Observatoire de Cointe
Swings, Polydore ULg; Dehalu, M.

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1929), XV(2), 119-125

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See detailQuelques analogies formelles entre certaines orbites
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1928), XIV(1-2), 60-66

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See detailSur le changement d'amplification dans le téléscope aplanétique
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1927), XIII(12), 837-848

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See detailLes orbites quasi elliptiques, les potentiels riemanniens et les forces centrales
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1927), XIII(2), 88-89

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See detailLes potentiels riemanniens et les formes quadratiques einsteiniennes dans le problème des deux corps
Swings, Polydore ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1926), 10

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See detailSur une modification lente de la constitution des solutions de certains sels
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1910), (1), 11-22

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See detailObservations sur l'action détersive des solutions de savon : Troisième communication : Les solutions de savon et l'hydrosol aluminique
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1909), (11), 1059-1065

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See detailObservations sur l'action détersive des solutions de savon : Deuxième communication : Les solutions de savon et les composés ferriques
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1909), (9-10), 949-966

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1909), 949-66; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). Blood ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1909), 949-66; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). Blood and colloidal hydrate of iron easily form with soap a combination of adsorption which is not sol. in H2O. This combination in presence of H2O does not have the power of adhering to glass, porcelain, cellulose, skin, etc. Hence such substances are cleaned by soap because the colloidal combination is not adsorbed by these solid substances. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved. [less ▲]

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See detailObservations sur l'action détersive des solutions de savon : Quatrième et dernière communication : Les solutions de savon et l'acide silicique, l'argile et la cellulose
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1909), (12), 1128-1139

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See detailObservations sur l'action détersive des solutions de savon : Première communication
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1909), (1), 187-206

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1909), 187-206; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010 ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1909), 187-206; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). Lampblack purified from fats and resins was tested for its rate of sedimentation in pure H2O, in 0.01-2% soap solns., in 0.01-2% soap solns. containing an equivalent of HCl or of KOH, and in MeOH or EtOH solns. of soap, the concentrations of soap being 1/50 and 1/60% in the MeOH and 0.02% in the EtOH. In H2O and in 2% soap soln. lampblack remained in suspension to the same extent; in 0.5% soap soln. in 6 days a small amount of lampblack remained in suspension; in I% soap soln. lampblack remained in suspension for more than 2 mos. In all cases some of the lampblack was deposited. The acid solns. in the different concentrations cleared quickly, while the alkaline solns. held the lampblack in suspension better than H2O. The alcohols acted as H2O, but to produce an effect of the same order, their mass ought to be 50-200 times as great as that of H2O. The soap soln. shaken with lampblack gave a heavier ash than the soap soln. alone. The soln. seemed to be divided into 2 parts, a more acid one which agglutinated with the lampblack and a more basic one which remained in the soln. Proof of this was found from the smaller ash remaining from the residue after treating in alc. The alc. solns. gave less of a detergent effect. The sediment of lampblack in the soap soln. differed from that in H2O by being viscous and oily while that in H2O was grainy and easily thrown into suspension in H2O. On filtration the lampblack from H2O suspensions blackened the paper completely while from soap soln. the particles not in contact with the paper were readily detached. Lampblack in pure H2O with a current of 8 volts did not conduct; in H2O rendered slightly alkaline the lampblack was deposited at the cathode; in a 2% soap soln. after some hrs. lampblack was deposited at the anode. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved. [less ▲]

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See detailNote complémentaire sur l'origine des nuances vertes des eaux de la nature
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1908), (3), 262-272

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1908), (No. 3), 262-72; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010 ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1908), (No. 3), 262-72; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). The author proved by observing long tubes of dilute suspensions of silica and mastic in water that brown tints may thus easily arise, but he obtained green tints only from colloidal suspensions of alumina and silica. The diffraction of light in such suspensions and not the nature of the suspended particles is therefore the cause, under certain circumstances at any rate, of the green tint of natural waters. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved. [less ▲]

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See detailSur la densité et l'état allotropique de certaines variétés de soufre : Remarque sur la détermination de la densité des corps en poudre fine
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1907), (6), 684-708

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See detailSur les modifications subies par quelques phosphates acides à la suite d'une compression ou d'une déformation mécanique
Spring, Walthère ULg

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1907), (3), 193-211

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1907), 193-211; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). The ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1907), 193-211; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). The author shows by expts. that: (1) Mech. deformation of primary phosphates involves their partial decompn. This commences with elimination of water of hydration and terminates with liberation of a certain amt. of phosphoric acid. The reversion of certain phosphates is facilitated by deformation. The decompn. appears to be more profound when the compds. resulting from it are liqs., i.e., in a form susceptible of elimination under pressure. The success or failure of the reaction is, then, directly connected with the mech. rather than the chem. conditions affecting the matter. (2) The primary phosphates of Ca and Na, probably also that of Li, form mol. combinations with the resp. sulfates. With calcium compds. this combination appears insol. in water and its formation can contribute to the reversion of the acid phosphates. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved. [less ▲]

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