José Luis Sagrera-Moreno、Demetrio Gaspar-Tebar1984-06-01Materiales de Construccion
In this study, which follows on from others, the pH variation is examined and also that of the concentration of Ca (II) and SO4 (II) ions in the mediums (filtered potable water) in which the test samples of mortar (1: 3) made with industrial portland cement resistent to gypsum (cement 2 < > P-450-Y) and with the mixtu…
Pedro Serna Ros1984-06-01Materiales de Construccion
In the work we are presenting, we have set ourselves the target of determining a practical method for ascertaining the dosage of fibrous concrete. To do this, as in any problem regarding dosage, we shall start from the possibilities of supply, which will be conditioned by the nature of the aggregates to be used, of ce…
Alfonso Recuero、J. Pedro Gutiérrez1984-06-01Materiales de Construccion
An algorithm to solve systems of linear homogeneous diophantine equations is given here. Subsequently, as an example of application, a method of heuristic search for the best solution is described; this fulfils certain conditions within an infinite space of solutions of various dimensions. Finally, an application of t…
V. KELLNER、Pavel ČEJKA、F. FRANTÍK1984-06-01Kvasny Prumysl
V prĂĄci je struÄnÄ shrnut vĂ˝znam jednotlivĂ˝ch kovĹŻ, tj. Al, As, Cd a Pb z hlediska pivovarskĂŠho a zĂĄroveĹ je poukĂĄzĂĄno na pĹĂpadnĂŠ ĹĄkodlivĂŠ zdravotnĂ efekty. Koncentrace uvedenĂ˝ch 4 prvkĹŻ byly mÄĹeny v 31 vzorku 12%, 10% a 8% piva dostupnĂŠho na ÄeskoslovenskĂŠm trhu (celkem bylo p…
Metallurgy and Material ScienceMineralogy and Gemology Studies
Maris Hartmanis、Sten Gatenbeck1984-06-01Applied and Environmental Microbiology
The levels of seven intermediary enzymes involved in acetate and butyrate formation from acetyl coenzyme A in the saccharolytic anaerobe Clostridium acetobutylicum were investigated as a function of time in solvent-producing batch fermentations. Phosphate acetyltransferase and acetate kinase, which are known to form a…
Endoplasmic Reticulum Stress and DiseaseEnzyme Structure and FunctionHemoglobin structure and function
Miklós Kertész、Roald Hoffmann1984-06-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOctahedral vs. trigonal-prismatic coordination and clustering in transition-metal dichalcogenidesMiklos Kertesz and Roald HoffmannCite this: J. Am. Chem. Soc. 1984, 106, 12, 3453–3460Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published…
Polyoxometalates: Synthesis and ApplicationsNanocluster Synthesis and ApplicationsMetal-Organic Frameworks: Synthesis and Applications
Masayuki Ieda1984-06-01OpenAlex
Better understanding of the fundamental electrical properties of polymeric materials is a key to their further progress in the practical application, not only as electrical insulating materials, but also as functional elements. In this paper, recent topics and their important results will be reviewed on electrical con…
Conducting polymers and applicationsAnalytical Chemistry and SensorsElectrochemical Analysis and Applications
J.-J. Didisheim、Peter Zolliker、K. Yvon 等 7 位作者1984-06-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimagnesium iron(II) hydride, Mg2FeH6, containing octahedral FeH64- anionsJ. J. Didisheim, P. Zolliker, K. Yvon, P. Fischer, J. Schefer, M. Gubelmann, and A. F. WilliamsCite this: Inorg. Chem. 1984, 23, 13, 1953–1957Publication Date (Print):June 1, 1984Publication History Pu…
Ammonia Synthesis and Nitrogen ReductionHydrogen Storage and MaterialsNanomaterials for catalytic reactions
Fred Wudl1984-06-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleFrom organic metals to superconductors: managing conduction electrons in organic solidsF. WudlCite this: Acc. Chem. Res. 1984, 17, 6, 227–232Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 1984https://pubs.acs.org/doi/1…
Organic and Molecular Conductors ResearchIonic liquids properties and applicationsMagnetism in coordination complexes
Keith Chaney、R. S. Swift1984-06-01OpenAlex
SUMMARY The stability of aggregates from 26 soils selected from agricultural areas was measured by wet‐sieving and the results correlated with sand, silt, clay, nitrogen, organic matter and iron contents and with cation exchange capacity. Highly significant correlations were obtained for the relationships between aggr…
Soil and Unsaturated FlowClay minerals and soil interactionsSoil Carbon and Nitrogen Dynamics
H. Toraya、Masahiro Yoshimura、Shigeyuki Sōmiya1984-06-01OpenAlex
A nonlinear calibration curve for volume fraction vs integrated intensity ratio was obtained for the monoclinic-tetragonal ZrO2 system by using X-ray powder pattern-fitting and pattern-decomposition techniques. The empirical equation agrees well with the theoretical one. By using this equation, the deviation from line…
Ferroelectric and Piezoelectric MaterialsNuclear materials and radiation effectsX-ray Diffraction in Crystallography
S. Alexander、P. M. Chaikin、Paul Grant 等 6 位作者1984-06-01OpenAlex
The interactions between charged colloidal particles with sufficient strength to cause crystallization are shown to be describable in terms of the usual Debye–Huckel approximation, but with a renormalized charge. The effective charge in general is smaller than the actual charge. We calculate the relationship between t…
Surfactants and Colloidal SystemsMaterial Dynamics and PropertiesPickering emulsions and particle stabilization
Д. В. Федосеев、V. P. Varnin、B. V. Deryagin1984-05-31Russian Chemical Reviews
Heterogeneous and homogeneous processes in the formation of diamond at low pressures, where diamond is a metastable modification of carbon, are discussed. Data on the kinetics of the growth of diamond from hydrocarbons under conditions which give codeposition with graphite are reported, together with data on the influ…
Diamond and Carbon-based Materials ResearchAdvanced materials and compositesMetal and Thin Film Mechanics
G. Timp、M. S. Dresselhaus1984-05-30Journal of Physics C Solid State Physics
The ultramicrostructure of commensurate graphite intercalation compounds has been investigated using high-resolution transmission electron microscopy. By directly examining the intercalate lattice at atomic resolution, the authors have discovered intercalate domains of nearly macroscopic dimensions (>1000 AA) exten…
Graphene research and applicationsGraphite, nuclear technology, radiation studiesAdvancements in Battery Materials
N.Y. Vasanthacharya、P. Ganguly、John B. Goodenough 等 4 位作者1984-05-30Journal of Physics C Solid State Physics
Single-phase LaNi 1-x Mn x O 3 samples in the compositional range 0<or=x<or=0.2 were prepared by the decomposition of precursor hydroxide solid solutions, and La 2 NiMnO 6 was prepared from a mixture of carbonates. All the samples contained a disordered array of nickel and manganese ions. X-ray absorption and XP…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Franklin Lonberg、Seth Fraden、Alan J. Hurd 等 4 位作者1984-05-21Physical Review Letters
Field-induced reorientations of liquid crystals, far from equilibrium, produce spatially periodic responses. The wavelength selected maximizes response speed. A detailed analysis of the effect in a novel geometry is presented, along with a discussion of its general importance in polymerlike liquid crystals.
Nonlinear Dynamics and Pattern FormationPlant Reproductive BiologyLiquid Crystal Research Advancements
W. Hayes、Michael J. Kane、Outi Salminen 等 4 位作者1984-05-20Journal of Physics C Solid State Physics
An ODMR study at 1.6K shows that the 3.4 eV luminescence of Y 2 O 3 originates in a triplet state. The results are consistent with an intrinsic trapping mechanism for excitons. The nature of the trapping mechanism is discussed. Results of an ODMR study of SC 2 O 3 are also reported, using the 3.6 eV luminescence.
Luminescence Properties of Advanced MaterialsSpectroscopy and Laser ApplicationsPerovskite Materials and Applications
R.M. Mehra、Hemant Kumar、Surinder Koul 等 4 位作者1984-05-16physica status solidi (a)
The dc conductivity of a-Se and binary amorphous SeTe, SeGe, and SeSb films is measured as a function of temperature (80 to 300 K) and film thickness (500 to 2000 Å). It is found that except for SeSb films, the conduction in all the samples takes place in the tails of localized states via thermally activated tunne…
Phase-change materials and chalcogenidesSolid-state spectroscopy and crystallographyChalcogenide Semiconductor Thin Films
S. R. Bakhchieva、N. Kekelidze、M. G. Kekua1984-05-16physica status solidi (a)
The thermal conductivity of Ge doped with electroneutral impurities, Si, Sn and the acceptor impurity, Al, is investigated in the temperature range 80 to 400 K. It is established that at equal impurity concentrations the temperature dependence of the thermal conductivity in Ge doped with the electroactive impurity Al,…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsAdvancements in Semiconductor Devices and Circuit Design
F. Appel、Marion Bartsch、U. Messerschmidt 等 5 位作者1984-05-16physica status solidi (a)
The dislocation dynamics in MgO single crystals containing some hundred ppm of aliovalant impurities is investigated by three experimental techniques: in-situ deformation experiments in the high-voltage electron microscope, stress pulse-etching experiments on individual dislocations, and macroscopic deformation experi…
High-pressure geophysics and materialsMicrostructure and mechanical propertiesSurface and Thin Film Phenomena