Détermination des systèmes canoniques des variétés représentant une involution cyclique privée de points unis appartenant à une variété algébrique.
确定属于代数流形的无结循环卷积的流形的正则系统。
{"title":"Involutions cycliques privées de points unis appartenant à une variété algébrique complètement régulière","authors":"L. Godeaux","doi":"10.3406/barb.1968.62165","DOIUrl":"https://doi.org/10.3406/barb.1968.62165","url":null,"abstract":"Détermination des systèmes canoniques des variétés représentant une involution cyclique privée de points unis appartenant à une variété algébrique.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127314536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
La pulvérisation cathodique du platine dans l’oxygène fournit des films de bioxyde de platine. La présente note décrit certaines particularités des dépôts obtenus en présence d’un champ magnétique et propose une structure cristalline pour cet oxyde.
{"title":"La structure cristalline de l’oxyde de platine : PtO2","authors":"O. Goche","doi":"10.3406/barb.1951.70610","DOIUrl":"https://doi.org/10.3406/barb.1951.70610","url":null,"abstract":"La pulvérisation cathodique du platine dans l’oxygène fournit des films de bioxyde de platine. La présente note décrit certaines particularités des dépôts obtenus en présence d’un champ magnétique et propose une structure cristalline pour cet oxyde.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127368874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
On démontre que pour les surfaces algébriques régulières de genre linéaire p(1) = 1, le bigenre est indépendant du genre géométrique pg.
证明了对于线性型p(1) = 1的正代数曲面，双型独立于几何型pg。
{"title":"Sur les surfaces algébriques de genre linéaire 1","authors":"Pól Burniat","doi":"10.3406/barb.1962.65452","DOIUrl":"https://doi.org/10.3406/barb.1962.65452","url":null,"abstract":"On démontre que pour les surfaces algébriques régulières de genre linéaire p(1) = 1, le bigenre est indépendant du genre géométrique pg.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127476935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
1. The quantities of γ-globulins secreted in vitro by fragments of spleen, synthesized in vivo by lymph node cells during short periods, or secreted in the blood by the entire immune system of rabbits hyperimmunized against tobacco mosaic virus or the flagellae of Salmonella paratyphi have been studied by incorporation of [3H] phenylalanine. In each case the quantities of [3H] phenylalanine simultaneously incorporated into the antibodies and into the non specific γ-globulins have been found to be equal. 2. It is proposed that all antibody producing cells synthesize equal quantities of antibody and of non specific γ-globulin. Such a parallelism might been expected if the clonal selection theory of antibody production proposed by Burnet is correct. Other interpretations are discussed.
{"title":"Mise en évidence d'une relation quantitative entre la synthèse des anticorps et celle des γ-globulines non spécifiques impliquée par la théorie de Burnet sur l'origine de la spécificité des anticorps","authors":"Y. Valette-Robin, N. Mairesse, R. Jeener","doi":"10.3406/barb.1965.65385","DOIUrl":"https://doi.org/10.3406/barb.1965.65385","url":null,"abstract":"1. The quantities of γ-globulins secreted in vitro by fragments of spleen, synthesized in vivo by lymph node cells during short periods, or secreted in the blood by the entire immune system of rabbits hyperimmunized against tobacco mosaic virus or the flagellae of Salmonella paratyphi have been studied by incorporation of [3H] phenylalanine. In each case the quantities of [3H] phenylalanine simultaneously incorporated into the antibodies and into the non specific γ-globulins have been found to be equal. \u0000 2. It is proposed that all antibody producing cells synthesize equal quantities of antibody and of non specific γ-globulin. \u0000 Such a parallelism might been expected if the clonal selection theory of antibody production proposed by Burnet is correct. Other interpretations are discussed.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124820430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Étude d'involutions du second ordre appartenant à des surfaces ou à des variétés algébriques à trois dimensions, intersections complètes d'hyperquadriques.
研究属于三维曲面或代数变种的二阶卷积，超四边形的完全交点。
{"title":"Sur les surfaces et variétés algébriques intersections d'hyperquadriques","authors":"L. Godeaux","doi":"10.3406/barb.1968.62163","DOIUrl":"https://doi.org/10.3406/barb.1968.62163","url":null,"abstract":"Étude d'involutions du second ordre appartenant à des surfaces ou à des variétés algébriques à trois dimensions, intersections complètes d'hyperquadriques.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124820876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Aux confins de la théorie et de la pratique","authors":"M. Homès","doi":"10.3406/barb.1957.68753","DOIUrl":"https://doi.org/10.3406/barb.1957.68753","url":null,"abstract":"","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124843291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The acidity constants, in the electronic excited state (pK*), of the conjugate acids of eight terms of a series of dimethy-lamino-4, a-cyanostilbenes (X — C6H4 — C(CN) = CH — C6H4 — N(CH3)2) and of eight terms of a series of dimethylamino-4, a-cyano-diphenylazomethines (X — C6H4 — C(CN) = N — C6H4 — N(CH3)2) were calculated using U.V. and visible spectroscopic v values. Plotting these pK* versus substituent constants, better correlations were obtained with a~ values (for electron-withdrawing substi-tuents) and a+ values (for electron-donating substituents) than with the common Hammett values. In the first series p — 6,95 and in the second p = 1,52. These results are briefly commented.
{"title":"Constantes d'acidité, à l'état excité, des α-cyanostilbènes et des α-cyanodiphénylazométhines paradiméthylaminés","authors":"E. Feytmans-de Medicis, A. Bruylants","doi":"10.3406/barb.1967.63015","DOIUrl":"https://doi.org/10.3406/barb.1967.63015","url":null,"abstract":"The acidity constants, in the electronic excited state (pK*), of the conjugate acids of eight terms of a series of dimethy-lamino-4, a-cyanostilbenes (X — C6H4 — C(CN) = CH — C6H4 — N(CH3)2) and of eight terms of a series of dimethylamino-4, a-cyano-diphenylazomethines (X — C6H4 — C(CN) = N — C6H4 — N(CH3)2) were calculated using U.V. and visible spectroscopic v values. \u0000 Plotting these pK* versus substituent constants, better correlations were obtained with a~ values (for electron-withdrawing substi-tuents) and a+ values (for electron-donating substituents) than with the common Hammett values. In the first series p — 6,95 and in the second p = 1,52. \u0000 These results are briefly commented.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"530 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124925127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The atomic heats of rhenium, in the normal and. superconducting states, have been determinedfrom 1,2 up to 24°K. The normal state atomic heat can be represented between 1,2 and 5°K by Cn = ɣT + 1944 (T/θD)3 with ɣ = (2,257 ± 0,026).10-3 joule • (at. gr.)-1. deg.-2 and θD = 407,4 ± 10,4° K. The electronic contribution to the atomic heat of the metal in the superconducting state can be represented below Tc = 1,699°K by Ces /ɣTc — a exp (— bTc/T) with a = 11,68 and b = 1,64 ; such an exponential relation is consistent with theory involving a gap in the spectrum of available energy levels. The entropy difference Sn — S s was found to vanish to within 4,7 % ; this. small deviation could be attributed to incorrect values of a and b used in the extrapolation to 0°K of the exponential relation. The critical field values deduced from the corrected Sn — Ss curve lead to H0 = 196 gauss but show deviation from the parabolic relation which can amount to 0,03 H0.
铼的原子热，在正常和。超导态，从1,2到24°K已经确定。在1、2和5°K之间，正常状态原子热可以用Cn = T + 1944 (T/θD)3表示，其中，n =(2,257±0,026)。10-3焦耳•(at。gr)。1。θD = 407,4±10,4°K。在Tc = 1,699°K以下，超导态金属的电子对原子热的贡献可以用ce / β Tc - a exp (- bTc/T)表示，其中a = 11,68, b = 1,64;这种指数关系与涉及可用能级谱间隙的理论是一致的。发现Sn - S的熵差在4.7%以内消失;这一点。小偏差可归因于外推指数关系0°K时使用的a和b值不正确。由修正后的Sn - Ss曲线推导出的临界场值H0 = 196高斯，但与抛物线关系存在偏差，偏差可达0.03高斯。
{"title":"Étude expérimentale de la chaleur spécifique du Rhenium","authors":"R. Blanpain","doi":"10.3406/barb.1961.68192","DOIUrl":"https://doi.org/10.3406/barb.1961.68192","url":null,"abstract":"The atomic heats of rhenium, in the normal and. superconducting states, have been determinedfrom 1,2 up to 24°K. The normal state atomic heat can be represented between 1,2 and 5°K by Cn = ɣT + 1944 (T/θD)3 with ɣ = (2,257 ± 0,026).10-3 joule • (at. gr.)-1. deg.-2 and θD = 407,4 ± 10,4° K. The electronic contribution to the atomic heat of the metal in the superconducting state can be represented below Tc = 1,699°K by Ces /ɣTc — a exp (— bTc/T) with a = 11,68 and b = 1,64 ; such an exponential relation is consistent with theory involving a gap in the spectrum of available energy levels. The entropy difference Sn — S s was found to vanish to within 4,7 % ; this. small deviation could be attributed to incorrect values of a and b used in the extrapolation to 0°K of the exponential relation. The critical field values deduced from the corrected Sn — Ss curve lead to H0 = 196 gauss but show deviation from the parabolic relation which can amount to 0,03 H0.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125035553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dans son ouvrage posthume « Le superficie algebriche » F. Enriques présente, page 397, un modèle possédant un faisceau elliptique de courbes de genre 1 et auquel il attribue, sans démonstration, les genres géométrique et arithmétique pg = 4 et pa = 3. Nous nous proposons de montrer que cette surface possède en fait les genres pg = 3 et pa = 2.
{"title":"Note sur un modèle de surface paraelliptique","authors":"Pól Burniat","doi":"10.3406/barb.1965.65182","DOIUrl":"https://doi.org/10.3406/barb.1965.65182","url":null,"abstract":"Dans son ouvrage posthume « Le superficie algebriche » F. Enriques présente, page 397, un modèle possédant un faisceau elliptique de courbes de genre 1 et auquel il attribue, sans démonstration, les genres géométrique et arithmétique pg = 4 et pa = 3. Nous nous proposons de montrer que cette surface possède en fait les genres pg = 3 et pa = 2.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125068128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Modification et simplification de l’oculaire de Danjon et A. Couder réalisées en vue de l’observation au réfracteur zénithal.
对Danjon和A. Couder的目镜进行了修改和简化，以进行天顶折射观测。
{"title":"Sur un oculaire spécialement destiné à l’observation à l’aide d’un réfracteur zénithal","authors":"J.H.J. Lemmens","doi":"10.3406/barb.1953.70034","DOIUrl":"https://doi.org/10.3406/barb.1953.70034","url":null,"abstract":"Modification et simplification de l’oculaire de Danjon et A. Couder réalisées en vue de l’observation au réfracteur zénithal.","PeriodicalId":296277,"journal":{"name":"Bulletin de la Classe des sciences","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125074152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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