'Tailormade' auxiliaries for nucleation, growth and dissolution of organic crystals
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Purification of p-dichlorobenzene and m-chloronitrobenzene crystalline particles by sweating.
In order to obtain highly purified organic substances, sweating of crude crystalline particles was investigated with two organics; m-chloronitrobenzene and p-dichlorobenzene. By maintaining the crude crystals at a temperature close to the equilibrium one in order to form melts and followed by rapid drainage of the mel…
Particulate recording materials
Information (audio, video, or data) to be recorded magnetically is first encoded into a sequence of time-varying electrical signals which are used to drive a writing head, the magnetic field of which creates, on the moving tape or disk, a spatially varying pattern of magnetization. The reading process uses another hea…
Surface and Subsurface Characteristics Related to Abrasive-Planing Conditions
The goal of this study was to examine the quality of abrasively planed wood surfaces when variable grit sizes, feed speeds, and depths of cut are used.Our observations show that grit size and wood structure and density seem to have larger effects on the depth and type of damage than feed speed and depth of cut.Coarser…
A measurement of the angular distribution of 5 eV atomic oxygen scattered off a solid surface in earth orbit
The angular distribution of 5 eV atomic oxygen scattered off a polished vitreous carbon surface was measured on a recent Space Shuttle flight. The experimental apparatus was of novel design, completely passive, and used thin silver films as the recording device for oxygen atoms. Most of the incident oxygen was contain…
Diatomées d'eau douce des îles Kerguelen (à l'exclusion des Monoraphidées)
Cet inventaire des diatomées d'eau douce des îles Kerguelen (Grande Terre) a été réalisé à partir de prélèvements effectués sur 31 stations représentant divers milieux : ruisseaux, rivières, lacs, rochers suintants. Dans la présente note, 279 taxons ont été déterminés, dont 3 sont considérés nouveaux pour la science.…
Photoconductivity in amorphous thin films of Ge22Se68Bi 10
Temperature and intensity dependence of steady state photoconductivity is studied in amorphous thin films of Ge22Se68Bi 10 prepared by vacuum evaporation. Photoconductivity increases exponentially with temperature between 310 K and 410 K and no maxima is found in this temperature range. The ratio Iph/ Id is about 6 at…
Algunas características del florecimiento del fitoplancton en el frente del Río de la Plata. I. Los sistemas nutritivos
During the spring (H-04/82: october 11-27, 1982)carried out by the Fishery Research Vessel "Dr.E.Holmberg", the distribution of temperature, salinity, nutrients concentration and photosynthetic pigments were studied at the "Rio de la Plata" maritime front. The presence of Sub-Tropical coastal waters in only station di…
The Chemistry of the Noncrystalline State
Abstract This article sets out to describe and account for the chemical and physical consequences of the presence of gross disorder in solids. Knowledge of the structure of such disordered materials is an obvious prerequisite to a further understanding of other properties and behavior, and our current knowledge of the…
Effects of slow heating rates on products of polyethylene pyrolysis
Polymeric materials, although they are not volatile themselves, may be analysed by gas chromatography (GC) through the use of analytical pyrolysis. Because the fragmentation pattern produced by heating is reproducible, the pyrolysates provide much information about the original macromolecule of which they were a part.…
Relationship between Drapability and Mechanical Properties of Fabrics
In order to evaluate formability of silhouette, drape coefficient obtained from circular specimen has been used.In this study, drape cofficient of lady's dress fabrics which are used mainly for one-piece dress or blouse is measured by FRL drape meter.And relationship between drapability and mechanical properties of fa…
Formation and organometallic reactivity of iridium(II) octaethylporphyrin dimer
Iridium(II) octaethylporphyrin dimer, [Ir(OEP)]2, has been prepared by photolysis of (OEP)IrCH3 in C6D6 solvent, and found to undergo alkene insertion and oxidative addition of alkyl C–H bonds.
Development and Fabrication of 70% PuC–30% UC Fuel for the Fast Breeder Test Reactor in India
Mixed uranium-plutonium monocarbide (MC) with a controlled amount of mixed sesquicarbide (M2C3) will be used as driver fuel for the first time in the world in the fast breeder test reactor (FBTR) at Kalpakkam, India. The mixed-carbide fuel for the FBTR has been developed on the basis of indigenous resources of plutoni…
Triaquahenicosatungstodiphosphate(6–) heteropolyanion, [P 2 W 21 O 71 (OH 2 ) 3 ] 6– : X-ray crystallographic and 183 W nuclear magnetic resonance structural studies
The single-crystal X-ray structure of K4H2[P2W21O71(OH2)3]·28H2O [space group P63/mmc, a= 16.295(2), c= 19.771(5)Å, and Z= 2; Mo radiation, R= 0.037 for 1 042 unique data] has been determined and the 183W n.m.r. spectrum of the anion in H2O–D20 has been recorded. The anion has true point symmetry C2v but occupies a D3…
Mixed-metal gold clusters. Synthesis and x-ray structural characterization of [Au5Re(H)4(PPh3)7](PF6)2 and [Au3Rh(H)(CO)(PPh3)5](PF6)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed-metal gold clusters. Synthesis and x-ray structural characterization of [Au5Re(H)4(PPh3)7](PF6)2 and [Au3Rh(H)(CO)(PPh3)5](PF6)Paul D. Boyle, Brian J. Johnson, Angela Buehler, and Louis H. PignoletCite this: Inorg. Chem. 1986, 25, 1, 5–7Publication Date (Print):January…
Materials Characterization
Volume 10 addresses materials characterization from an engineering perspective, describing the capabilities and limitations of various analytical tools and what they reveal about the composition, structure, and state of engineering materials. It examines optical metallography, electron microscopy, diffraction, chromat…
Plastics : microstructure, properties and applications
Plastics: microstructure, properties, and applications , Plastics: microstructure, properties, and applications , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
Acid-base and metal ion complex formation properties of polymers containing amino acid residues
The basicity and Cu(II) ion complexation of polymers containing amino acid residues, carrying a tertiary amino group in the main chain and a carboxylic group as the side-chain substituent, have been studied in aqueous solution by potentiometric, viscosimetric, and spectrophotometric techniques. Both protonation consta…
Diamagnetic anisotropy of organometallic moieties: .chi. values for M(CO)3 (M = Cr, Mo, W) and for ferrocene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiamagnetic anisotropy of organometallic moieties: .chi. values for M(CO)3 (M = Cr, Mo, W) and for ferroceneMichael J. McGlinchey, Robert C. Burns, Roger Hofer, Siden Top, and Gerard JaouenCite this: Organometallics 1986, 5, 1, 104–109Publication Date (Print):January 1, 1986…
The Adhesion Mechanism of Dental Adhesive Resin to the Alloy
A dental adhesive resin containing 4-META was bonded to three different surface states, an as-polished surface and two oxidized surfaces, of a 70 mass % Co-Cr alloy. The surface structure of the alloys was analyzed by ESCA and reflection electron diffraction. The relationship between the bonding strength and surface s…