References of "Bulletin de la Classe des Sciences. Académie Royale de Belgique"
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See detailLes terrains les plus anciens de Belgique.
Malaise, Constantin ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1910), 12

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

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

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See detailAposporie et sexualité chez les mousses. II
Marchal, Elie; Marchal, Émile ULiege

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

See detailSur la position géologique de l'assise de Mousty
Malaise, Constantin ULiege

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

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

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 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 ULiege

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 : Deuxième communication : Les solutions de savon et les composés ferriques
Spring, Walthère ULiege

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 : Troisième communication : Les solutions de savon et l'hydrosol aluminique
Spring, Walthère ULiege

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

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

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 detailAposporie et sexualité chez les mousses. I
Marchal, Elie; Marchal, Émile ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1907), 7

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See detailSur la couleur du glycol éthylénique et de la glycérine
Spring, Walthère ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1907), (12), 1031-1040

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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 ULiege

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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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 ULiege

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

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See detailLa tuffoïde kératophyrique de Grand-Manil
Malaise, Constantin ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1906), 3

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See detailSur un hydrate de soufre
Spring, Walthère ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1906), (7), 452-459

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1906), 1906, 452-59; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). If ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1906), 1906, 452-59; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). If one lets sulfurous acid in water and hydrogen sulfide work on the other, then Polythionic acid form and sulfur, what latter after DEBUS (Chem. News 57. 87) a new allotropic modification with the ability to form with water a colloidal solution is to be (sulfur δ). The alleged Pentathionic acid shows up with intensive illumination not as an homogeneous body, but as a colloidal solution, and the sulfur δ of DEBUS not a allotropic modification, but a hydrate is S8•H2O. One receives it, if one removes and up to the constant weight in the vacuum dries the acid from with above reaction the formed S by months-long dialyze with daily fresh water, as a yellowish, partially translucent mass from conchoidal break; there is 51.6% sulfur when washing with CS2. The part unsolvable in CS2 dismisses from about 80° at water, with the melting point of the S the formula S8•H2O appropriate quantity (S8 = molecular size of the firm S!). The density of hydrate pressed in cylinder form amounts to with 19°, related to water of 4°, 1.9385; meadow after 93.6/2.07 6.4/1 = 51.6; = 100/51.6 = 1.9380 on octahedral S, if were residual insoluble S not after removal water in CS2. Powdered hydrate loses 2.41% H2O, the pressed 1.33% with 7-monthly standing over H2SO4; it thus has a vapor pressure. A part of hydrate is destroyed; simultaneous increased its density. If the drained body with water remains in contact, then the density decreases again; it exists thus a condition of the S, which connects itself directly with water, and which delivers the water in the dry medium again. In the desiccator partially S give in powder form 3.1%, in the pressed condition 5.8% at CS2 in solution dehydrated. Pressure favors thus the transition of the matter to a condition of larger density. 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 l'origine des nuances vertes des eaux de la nature et sur l'incompatibilité des composés calciques, ferriques et humiques en leur milieu
Spring, Walthère ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1905), (7), 300-309

Spring, W. Bull. de l'Acad. royale de Belg. (1905), 1905, 300 to 310; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). After Baron V. AUFSESS (Die ... [more ▼]

Spring, W. Bull. de l'Acad. royale de Belg. (1905), 1905, 300 to 310; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). After Baron V. AUFSESS (Die Farbe der Seen. Inaug.-Diss. Muenchen 1903) the refraction of the light does not have influence on the change of the blue color water, mainly also because one can obtain green water by dissolving lime compounds/connections, yellow or brown water by solve ones of humus substances in pure water. The going by experiments of the authors, which are down partly in detail described, led however to the subsequent results: the lime compounds/connections natural water do not have inherent color and are not a cause of the much-observed green coloring in with examination appearing even clear lime water; the green, after elimination of the dyes residual coloring contained in the water is the result of the refraction of the light through invisible portion cups, which the water still includes, and whose presence can be done by an intensive light beam. The lime compounds/connections affect strongly fell in the water contained the ferric compounds/connections and with these on the humus substances, which the latter natural color water strongly change. Lime salts protect therefore the blue color water. In case of the not-blue, lime-containing, natural water an equilibrium between the cleaning effect of their lime compounds/connections results and steady influxes of the humus and ferric compounds/connections, which let disappear its brown coloring lower for itself the blue color water. The blue, more or less greenish color of the purest water give information over the point, where the equilibrium between the antagonists is fixed. Purely blue water (6 m coating thickness) becomes green by dissolving lime from Icelandic double spar; when introducing CO2 a clear, somewhat less green solution of acid calcium carbonate forms; also gypsum colors such water green. During the passage of radiation of electrical light these solutions appear, particularly the CaH2(CO3)2-containing, optically clouds, it carefully to dry was evaporated, the residue contained partially organic substance, partially SiO2 or silicates (from the glass of the container), which were contained in the solution therefore in the colloidal condition. After filtering the other Ca-containing solutions by animal charcoal these showed the same blue color as pure water. When regarding by a pipe of 6 m length appears pure water with 1/1 000 000 part ferric hydroxide brown, with 1/2 000 000 green, with 1/5 000 000 unmodified blue. With humus substances the blue color is already changed by more than 1/40 000 000 part. Ferric salts color brownish; they are particularly reduced by humus substances, in the light, sometimes partially to ferrous compounds/connections, whose color is not possible, and which with the humus substances insoluble, failing compounds to be received. To a liter of clear solution with 1/3 000 000 if part colloidal Fe(OH) 3 (to dissolve of FeCl3 in H2O) is added a same volume acid calcium carbonate or CaSO4-Solution, then a flocculation, tags begins is because of the container soil a brown, ocher-colored dirt, the water is perfectly clear, appears green and leaves a residue of CaCO3 or CaSO4 without trace iron after few instants; the sediment contains 85-90% Fe(OH)3, CaCO3 or CaSO4. Also with insoluble CaCO3 begins the flocculation of the ferric compounds/connections immediately; similarly soluble salts work; with sodium chloride (sea water) a trace remains iron in solution. 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 limite de visibilité de la fluorescence et sur la limite supérieure du poids absolu des atomes d'hydrogène
Spring, Walthère ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1905), (5), 201-211

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1905), 201-11; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). A ... [more ▼]

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1905), 201-11; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). A solution of fluorescein in optically pure water was subjected to the action of a powerful beam of electric light, and the limit of dilution was observed at which a visible green fluorescence was produced. Assuming under these conditions that one cubic millimetre of the solution contained one molecule of fluorescein (C20H10O5K2 = 408), the value 2.5 × 10-21 grams is obtained for the superior limit of the weight of the atom of hydrogen, which is one-twenty-thousand-millionth part of the value 5 × 10-11 calculated by Annaheim (this Journal, 1877, i, 31), but is about seven thousand times as great as the value 3.45 × 10-25 calculated from the kinetic theory of gases. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved [less ▲]

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See detailLa roche kératophyrique de Grand-Coo, par E . Mathieu (note bibliographique). Rapport par C. Malaise
Malaise, Constantin ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1904), 4

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See detailDernière réplique à M. Ch. Lagrange
Folie, François ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1904), 1

The author announces a last reply about the latitude variations and the diurnal nutation existence.

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See detailSur de nouveaux termes du second ordre provenant du mouvement systématique
Folie, François ULiege

in Bulletin de la Classe des Sciences. Académie Royale de Belgique (1904), 3

The author found other periodic terms resulting from the systematic aberration and develops their calculations.

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