Rafael Talero Morales1988-09-01Materiales de Construccion
The reader should first refer to the summary of the first part of this work (published in Materials de Construction, no. 209) in order to have a clearer idea of the subject being dealt with herein. In this part of the work, the experimental results of the ECO parametre (Evolution of Organoleptic Characteristics of the…
A. J. C. Wilson1988-09-01Acta Crystallographica Section A Foundations of Crystallography
Mirror planes and rotation axes lead to rarity of space groups for organic structures. Their inhibiting effect is mitigated by the simultaneous presence of glide planes or screw axes or both. To a first approximation the number of structures in each space group of a given crystal class is given by Nsg = Acc exp (- Bcc…
Polymer Synthesis and CharacterizationInorganic and Organometallic ChemistryCrystallography and molecular interactions
C. Andrade、B. Bacle、C. Alonso 等 4 位作者1988-09-01Materiales de Construccion
This report describes several tests that are being carried out on a viaduct near Madrid City, whose reinforcements have been seriously damaged by corrosion. These tests consist in measuring corrosion potentials and in a time soon to come, they will include the measurement of corrosion rates by means of the apparent Po…
Jürgen Bajorath、Winfried Hinrichs、Wolfram Saenger1988-09-01European Journal of Biochemistry
The fungal proteinase K (EC 3.4.21.14) is a very potent unusually stable member of the subtilisin family. Its X-ray structure determined at 0.15-nm resolution shows two bound Ca2+ ions. Ca1 is in near-ideal pentagonal bipyramidal configuration with Asp200 carboxylate and Pro175 peptide C = O in an apical, and Val177 p…
Microbial Metabolism and ApplicationsEnzyme Structure and FunctionTrace Elements in Health
W. Helfrich、Jacques Prost1988-09-01Physical Review A
A linear term linked to molecular chirality occurs in the bending energy of membranes with ${C}_{2}$ or ${D}_{2}$ symmetry. We find it to alternate in sign, depending on the direction of a cylindrical curvature, and discuss consequences for anisotropic solid membranes, tilted fluid bilayers, and ferroelectric smectic…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsLipid Membrane Structure and Behavior
L. Morbitzer、U. Grigo1988-09-01OpenAlex
Abstract Die sich ausweitenden Einsatzbereiche des Polycarbonats Polycarbonat auf Basis von Bisphenol A (im Text als BPA‐PC oder einfach als PC bezeichnet) . (PC) machen es notwendig, das Verständnis für die physikalischen Grundlagen auch in die mehr anwendungsorientierten Bereiche hineinzutragen. Der vorliegende Arti…
Engineering and Materials Science StudiesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
David E. Stilwell、Su‐Moon Park1988-09-01OpenAlex
Details of the growth properties of polyaniline (PA) have been studied employing electrochemical techniques (potential cycling method) and the results are reported. The electrochemical growth may be characterized as autocatalytic, and the growth rate is first order in aniline concentration. The growth rate is also dep…
Analytical Chemistry and SensorsConducting polymers and applicationsElectrochemical sensors and biosensors
Guanghua Yi、Zheng Wu、M. Sayer1988-09-01OpenAlex
Crack-free transparent ferroelectric polycrystalline Pb(Zr,Ti)O3 thin films were prepared by spin-coating solutions of complex alkoxides. The preparation of stock solution, firing, and annealing of films was described. The coating of the intermediate layer of Al2O3 increased the adhesion between Pb(Zr,Ti)O3 thin films…
Perovskite Materials and ApplicationsNonlinear Optical Materials ResearchFerroelectric and Piezoelectric Materials
Kunihiro Ichimura、Yasuzo Suzuki、Takahiro Seki 等 5 位作者1988-09-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible change in alignment mode of nematic liquid crystals regulated photochemically by command surfaces modified with an azobenzene monolayerKunihiro Ichimura, Yasuzo Suzuki, Takahiro Seki, Akira Hosoki, and Koso AokiCite this: Langmuir 1988, 4, 5, 1214–1216Publication…
Liquid Crystal Research AdvancementsPhotonic and Optical DevicesPhotonic Crystals and Applications
Jeppe C. Dyre1988-09-01OpenAlex
A brief review of the history of ac ionic and electronic conduction in disordered solids is given, followed by a detailed discussion of the simplest possible realistic model: the random free-energy barrier model. This model assumes conduction takes place by hopping, where the hopping charge carriers are subject to spa…
Material Dynamics and PropertiesFerroelectric and Piezoelectric MaterialsPhotonic Crystals and Applications
Alberto Gabizón、Demetrios Papahadjopoulos1988-09-01OpenAlex
The rapid clearance of circulating liposomes from the bloodstream, coupled with their high uptake by liver and spleen, has thus far been an obstacle to any attempts at targeting to tumors. We have assessed the impact of liposome composition on their clearance from the circulation in normal and tumor-bearing mice and o…
ATP Synthase and ATPases ResearchCancer, Hypoxia, and MetabolismNanoparticle-Based Drug Delivery
Yu. A. Izyumov1988-08-31Soviet Physics Uspekhi
A review is made of theoretical concepts from nonlinear dynamics of quasi-one-dimensional magnetic materials and of experimental investigations of solitons by inelastic neutron scattering and of studies of anomalies of thermodynamic quantities such as the specific heat, magnetization, susceptibility, etc. The main inv…
Inorganic Fluorides and Related CompoundsPhysics of Superconductivity and MagnetismSolid-state spectroscopy and crystallography
R. J. Nelmes1988-08-30Journal of Physics C Solid State Physics
High-resolution neutron diffraction results for KH 2 PO 4 (KDP) and its deuterated form (DKDP) have been used to re-examine evidence that the large increase in the phase transition temperature, T c , on deuteration can be explained simply by the increase in the phase transition temperature, T c , on deuteration can be…
Crystallography and molecular interactionsSolid-state spectroscopy and crystallographyMolecular Spectroscopy and Structure
Y. Oono、M. Bahiana1988-08-29Physical Review Letters
We demonstrate the relation $\ensuremath{\theta}=2\ensuremath{\varphi}$. Here the exponent $\ensuremath{\theta}$ is defined as $D\ensuremath{\sim}{N}^{\ensuremath{\theta}}$, where $D$ is the equilibrium lamellar thickness of the diblock copolymer ordered phase and $N$ is the molecular weight. The exponent $\ensuremath…
Fluid Dynamics and Thin FilmsTheoretical and Computational PhysicsBlock Copolymer Self-Assembly
Lei He、X. Z. Li、Z. Zhang 等 4 位作者1988-08-29Physical Review Letters
A 1D quasicrystal derived from the 2D decagonal quasicrystal has been found in rapidly solidified ${\mathrm{Al}}_{80}$${\mathrm{Ni}}_{14}$${\mathrm{Si}}_{6}$, ${\mathrm{Al}}_{65}$${\mathrm{Cu}}_{20}$${\mathrm{Mn}}_{15}$, and ${\mathrm{Al}}_{65}$${\mathrm{Cu}}_{20}$${\mathrm{Co}}_{15}$ alloys. They inherit periodicity…
Mineralogy and Gemology StudiesX-ray Diffraction in CrystallographyQuasicrystal Structures and Properties
H. Bacry、Louis Michel、J. Žák1988-08-22Physical Review Letters
We show that pairs of simple energy bands exist that have identical symmetries for their Bloch functions, but different symmetries for the corresponding Wannier functions. For finite crystals such pairs of bands belong to equivalent band representations. In the case of infinite crystals, we use the analyticity of simp…
Solid-state spectroscopy and crystallographyOptical and Acousto-Optic TechnologiesNonlinear Optical Materials Research
K. Shimakawa、Koji Miyake1988-08-22Physical Review Letters
The temperature dependence of the dc conductivity has been measured on sputtered amorphous carbon films. The conductivity is proportional to ${T}^{n}$ with $n=15\ensuremath{-}17$ over a wide temperature range, suggesting for the first time that the multiphonon tunneling transition with weak electron-lattice coupling o…
Semiconductor materials and devicesCarbon Nanotubes in CompositesDiamond and Carbon-based Materials Research
Bruce J. Ackerson、P. N. Pusey1988-08-22OpenAlex
Suspensions in a liquid of "nearly hard" colloidal spheres were subjected to steady and oscillatory shear flows and studied by light scattering. Samples which exhibit a fluidlike ordering of the particles in equilibrium were induced to a solidlike order by oscillatory shear of strain amplitude \ensuremath{\simeq}1. In…
Granular flow and fluidized bedsRheology and Fluid Dynamics StudiesMaterial Dynamics and Properties
Chang Seoul、Sang Yong Kim1988-08-20Journal of Polymer Science Part B Polymer Physics
Abstract Dried gel film of ultrahigh‐molecular‐weight polyethylene (UHMW PE) can be drawn to 370 times its original length at 135°C. Single‐crystal mats and dried gel film of UHMW PE develop double orientation despite uniaxial stretching. This is unique for preferentially oriented UHMW PE systems. To elucidate the ori…
Natural Fiber Reinforced CompositesPolymer crystallization and propertiesbiodegradable polymer synthesis and properties
Mitsuyoshi Fujiyama、Yoshimasa Kawamura、Tetsuo Wakino 等 4 位作者1988-08-20Journal of Applied Polymer Science
Abstract In Part II of this series we reported that by using a successively stretching tenter method, biaxially‐oriented polypropylene films (BOPs) with a crater‐like roughness have been obtained by selecting appropriate machine direction (MD) stretching conditions. In the present article, in order to select still bet…
Natural Fiber Reinforced CompositesPolymer crystallization and propertiesMechanical Behavior of Composites