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Les problèmes de perturbations et les champs self-consistents

L. Brillouin1932-01-01Journal de physique

Le problème des perturbations, en mécanique ondulatoire, peut être traité rigoureusement et aboutit à une équation séculaire, écrite sous forme de déterminant ; on retrouve facilement les formules de Schrödinger pour un problème non dégénéré ou dégénéré ; mais cette équation permet aussi d'étudier le cas d'une grosse…

Electron and X-Ray Spectroscopy TechniquesAdvanced Chemical Physics Studies

A New Type of Crystal Fine-Structure: Lithium Ferrite (Li2O ·Fe2O3)

Ε. Posnjak、Tom. F. W. Barth1931-12-15Physical Review

The interpretation of the x-ray diffraction obtained from the isometric modification of lithium ferrite resulted in the conclusion that the smallest "unit" of this structure contains four anions and four cations. The anions, oxygens, occupy the four equivalent points $4b$ while the cations, iron and lithium, occupy to…

Magnetic Properties and Synthesis of FerritesIron oxide chemistry and applications

Konstitution und Eigenschaften des Tricarbonylnitrosylkobalts

F. Reiff1931-12-15Zeitschrift für anorganische und allgemeine Chemie

Abstract Auf Grund der Anschauungen von I. Langmuir über den Bau der Metallcarbonyle kann ein monomolekulares destillierbares Kobaltcarbonyl nicht existieren. Dagegen zeigt das monomolekulare Tricarbonylnitrosylkobalt in seinen Eigenschaften eine weitgehende Analogie zum Nickeltetracarbonyl und zum Eisenpentacarbonyl.…

Organometallic Compounds Synthesis and CharacterizationMagnetism in coordination complexesInorganic Fluorides and Related Compounds

INDUSTRIAL COATINGS FROM THE CONSUMER'S VIEWPOINT Requirements of Airplane Coatings1

J. L. Mccloud1931-12-01Industrial & Engineering Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTINDUSTRIAL COATINGS FROM THE CONSUMER'S VIEWPOINT Requirements of Airplane Coatings1J. L. McCloudCite this: Ind. Eng. Chem. 1931, 23, 12, 1334–1339Publication Date (Print):December 1, 1931Publication History Published online1 May 2002Published inissue 1 December 1931https://…

Catalysis and Oxidation ReactionsMaterial Selection and PropertiesRailway Systems and Materials Science

Sur le symbolisme des groupes de repetition on de symetrie des assemblages cristallins

Ch. Mauguin1931-12-01Zeitschrift für Kristallographie - Crystalline Materials

Article Sur le symbolisme des groupes de repetition on de symetrie des assemblages cristallins was published on August 1, 1931 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 76, issue 1-6).

Crystallization and Solubility StudiesHistory and advancements in chemistry

Determination of Synchronous Machine Constants by Test Reactances, Resistances, and Time Constants

Sherwin H. Wright1931-12-01Transactions of the American Institute of Electrical Engineers

In recent years there have been many advancements made in the art of analysis of three-phase synchronous machine operation. Most treatments to date have very properly stressed the theoretical point of view, the practical point of view receiving less attention due in part to the complications involved, particularly tho…

Electric Motor Design and AnalysisPower Transformer Diagnostics and InsulationMagnetic Properties and Applications

A Set of Empirical Crystal Radii for Ions with Inert Gas Configuration

W. H. Zachariasen1931-12-01Zeitschrift für Kristallographie - Crystalline Materials

Article A Set of Empirical Crystal Radii for Ions with Inert Gas Configuration was published on December 1, 1931 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 80, issue 1-6).

X-ray Diffraction in Crystallography

X‐RAY AND MICROSCOPIC STUDIES OF SILICATE MELTS CONTAINING ZrO 2 1

Helen Blair Barlett1931-11-01Journal of the American Ceramic Society

ABSTRACT Silicate melts containing ZrO 2 were examined by means of the X‐ray and the microscope to establish the form of crystallization of the zirconium compounds under various conditions of temperature and composition. The effect of certain fluxes on these compounds was also determined.

Advanced ceramic materials synthesisIntermetallics and Advanced Alloy PropertiesX-ray Diffraction in Crystallography

THE THERMAL EXPANSION OF SOME REFRACTORY OXIDES 1

J. B. Austin1931-11-01Journal of the American Ceramic Society

ABSTRACT The thermal expansion of crystals of alpha‐alumina, magnesia, chromite, mullite, and zircon and of a mass of fused zirconia has been measured up to 1000°C. The results are exhibited in tables and in graphical form.

Nuclear materials and radiation effectsThermal and Kinetic AnalysisAdvanced ceramic materials synthesis

Thermal Decomposition of Alunite1

Wolfgang Fink、Klaus Horn、H. A. Pazour1931-11-01Industrial & Engineering Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Decomposition of Alunite1W. L. Fink, K. R. Van Horn, and H. A. PazourCite this: Ind. Eng. Chem. 1931, 23, 11, 1248–1250Publication Date (Print):November 1, 1931Publication History Published online1 May 2002Published inissue 1 November 1931https://pubs.acs.org/doi/10.…

Thermal and Kinetic AnalysisZeolite Catalysis and SynthesisInorganic Chemistry and Materials

The Crystal Lattice of Calcium Metaborate, CaB 2 O 4

W. H. Zachariasen1931-11-01Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.

Solid-state spectroscopy and crystallographyCrystal Structures and PropertiesInorganic Chemistry and Materials

SOLUBILITY OF CELLULOSE IN AMMONIA SALT SOLUTIONS

Philip C. Scherer1931-11-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSOLUBILITY OF CELLULOSE IN AMMONIA SALT SOLUTIONSPhilip C. SchererCite this: J. Am. Chem. Soc. 1931, 53, 11, 4009–4013Publication Date (Print):November 1, 1931Publication History Published online1 May 2002Published inissue 1 November 1931https://doi.org/10.1021/ja01362a012RI…

Advanced Cellulose Research StudiesLignin and Wood Chemistry

THE SOLUBILITY OF CALCIUM HYDROXIDE IN AQUEOUS SALT SOLUTIONS

John Johnston、Clinton Grove1931-11-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE SOLUBILITY OF CALCIUM HYDROXIDE IN AQUEOUS SALT SOLUTIONSJohn. Johnston and Clinton. GroveCite this: J. Am. Chem. Soc. 1931, 53, 11, 3976–3991Publication Date (Print):November 1, 1931Publication History Published online1 May 2002Published inissue 1 November 1931https://p…

Crystallization and Solubility Studies

The Significance of Drain Tile in Indiana

W. LeRoy Perkins1931-10-01Economic Geography

F ROR more than three-quarters of a century the manufacture of drain tile has been a substantial industry in Indiana. From the total of 143 factories in 1904, the number has decreased to 24 at the present time. Taking into account, however, the monetary depreciation since 1904, the total value of drain tile production…

Clay minerals and soil interactions

XLIII.—Notes on the Genus Xyleborus, Eichh.

Karl E. Schedl1931-10-01Annals and Magazine of Natural History

(1931). XLIII.—Notes on the Genus Xyleborus, Eichh.. Annals and Magazine of Natural History: Vol. 8, No. 46, pp. 339-347.

Botany and Plant Ecology StudiesDiatoms and Algae Research

Poisoning of Platinum Catalysts for Oxidation of Ammonia

Jet Yee、P. H. Emmett1931-10-01Industrial & Engineering Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoisoning of Platinum Catalysts for Oxidation of AmmoniaJ. Y. Yee and P. H. EmmettCite this: Ind. Eng. Chem. 1931, 23, 10, 1090–1092Publication Date (Print):October 1, 1931Publication History Published online1 May 2002Published inissue 1 October 1931https://pubs.acs.org/doi/…

Catalytic Processes in Materials Science

THERMAL ENERGY STUDIES. II. PHENYL DERIVATIVES OF METALS

Richard H. Smith、Donald H. Andrews1931-10-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHERMAL ENERGY STUDIES. II. PHENYL DERIVATIVES OF METALSRichard H. Smith and Donald H. AndrewsCite this: J. Am. Chem. Soc. 1931, 53, 10, 3661–3667Publication Date (Print):October 1, 1931Publication History Published online1 May 2002Published inissue 1 October 1931https://pub…

Thermal and Kinetic AnalysisChemical Thermodynamics and Molecular StructureVarious Chemistry Research Topics

Note on a Marine Labyrinthula

Margaret W. Jepps1931-10-01Journal of the Marine Biological Association of the United Kingdom

Plasmodia of Labyrinthula almost invariably appear in the diatom cultures and other small marine aquaria which I have kept during the last several years for a variety of purposes in Glasgow. These aquaria are stocked with material from Millport, I. of Cumbrae, and I think it quite certain that the Labyrinthula is impo…

Cephalopods and Marine BiologyDiatoms and Algae Research

Dependence of Reaction Velocity upon Surface and Agitation

A. W. Hixson、J. H. Crowell1931-10-01Industrial & Engineering Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of Reaction Velocity upon Surface and AgitationA. W. Hixson and J. H. CrowellCite this: Ind. Eng. Chem. 1931, 23, 10, 1160–1168Publication Date (Print):October 1, 1931Publication History Published online1 May 2002Published inissue 1 October 1931https://pubs.acs.or…

Machine Learning in Materials ScienceAdvanced Chemical Physics Studies

The Structure Viscosity of Rubber Solutions

B.A. Dogadkin、D. Pewsner1931-09-01Rubber Chemistry and Technology

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation B. Dogadkin, D. Pewsner; The Structure Viscosity of Rubber Solutions. Rubber Chemistry and Technology 1 Sep…

Rheology and Fluid Dynamics StudiesPolymer crystallization and propertiesVarious Chemistry Research Topics