Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinuclear mixed-valence manganese(II)-manganese(III) complexes: insight about the resolution of hyperfine structure in the EPR spectrumHabibe Diril, Hsiu Rong Chang, Xiaohua Zhang, Scott K. Larsen, Joseph A. Potenza, Cortlandt G. Pierpont, Harvey J. Schugar, Stephan S. Isied…
The title compound 1 can be regarded as a derivative of a “small supracluster”. This supracluster belongs to a series of vertex‐sharing icosahedra with a metal atom at the center of each icosahedron; the basic structural unit thus comprises 13 atoms. The simplest supracluster of 25 atoms (i.e. two units with a common…
If a crystal is illuminated by a polychromatic beam of X-rays, then many orders of each Bragg reflection may be stimulated simultaneously, and overlap exactly in scattering angle. The overlap of these multiple orders along a ray (a central line in reciprocal space) poses a problem for Laue methods. A theory of the dis…
The charging‐discharging behavior of battery was found to show a different dependence on the thickness of a polypyrrole film cathode prepared at various polymerization potentials. Lithium batteries constructed with a polypyrrole cathode formed at a higher potential show better charging‐discharging performance characte…
Poly(aniline), when immersed in acid electrolytes, is an electronic conductor between 0.2 and 0.8 V sce . Concurrent measurements of ESR absorption and injected charge during a potential scan across this region reveal a major increase in paramagnetism within the conducting regime, with sharp maxima near 0.2 and 0.8V.…
The energy imparted to biological tissue after the decay of incorporated Auger emitters stems from two sources: (a) energy deposition by the Auger and Coster-Kronig electrons and (b) the charge potential which remains on the multiple ionized atom after the end of the cascade. For the numerical assessment of both the k…
Small-angle neutron scattering experiments investigating the structure of porous Vycor glass are reported. The long-wave-length behavior ($0.004{\AA{}}^{\ensuremath{-}1}\ensuremath{\le}q\ensuremath{\le}0.025{\AA{}}^{\ensuremath{-}1}$) of the measured structure factor $S(q)$ is in good agreement with Cahn's prediction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagic angle spinning NMR studies of silicon carbide: polytypes, impurities, and highly inefficient spin-lattice relaxationJ. Stephen Hartman, Mary F. Richardson, Barbara L. Sherriff, and Beatrice G. WinsborrowCite this: J. Am. Chem. Soc. 1987, 109, 20, 6059–6067Publication D…
Abstract Low-temperature structural study of [(CH3)4N][Ni(dmit)2]2 suggested that the rotational freedom of methyl group seems to play an important role in the “metal-semimetal” transition. Superconducting transition was observed at 5 K (7 kbar).
In order to investigate the influence of oxygen on the chemical vapor deposition (CVD) of diamond, gas mixtures of H 2 –CH 4 and H 2 –CH 4 –O 2 were used to carry out thermal CVD. The effects of the oxygen additive were examined by gas chromatography for the exhaust gas and by a characterization of the deposits. With…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA possibility of crystal size distribution control using additives in batch-cooling crystallizationNoriaki Kubota and Hiroshi TakahashiCite this: Ind. Eng. Chem. Res. 1987, 26, 9, 1936–1939Publication Date (Print):September 1, 1987Publication History Published online1 May 20…
The newly discovered phenomenon of stress-dependent saturation magnetostriction, observed in low-magnetostrictive metallic glasses, is discussed. Its influence on the measurements of saturation magnetostriction is seen when the experiments are carried out by means of indirect methods based on the Villari effect. A pro…
Abstract Die Änderung der Molmassenverteilung linearer Poly(dimethylsiloxane) nach Kontakt mit Diethylamin und Diethylamin‐Kaliumhydroxid‐Gemischen wurde mit der GPC verfolgt. Der Abbau führt zu Polysiloxanen des Polymerisationsgrades 8 bis 20.
Abstract An analysis of the 1 H and 13 C NMR spectra of the chlorobutyl and bromobutyl rubbers was performed. Peaks were assigned based on evidence from broad-band decoupled, off-resonance decoupled, selectively decoupled and J-modulated spectra, the known characterization of butyl rubber and halogenation studies on m…
Relationships between the mean area, volume and thickness for dispersed particles of kaolinites and micaceous clays and their application to surface area and ion exchange properties - Volume 22 Issue 3
A pseudobinary phase diagram of the Nd- (Fe14,B) system and liquidus isotherms in the Nd2Fe14B(T1) primary field of the Fe-Nd-B ternary system were determined by DTA, XRD, metallography and EDX techniques. The peritectic region for the appearence of T1phase is in the range of 3 % to 40 % Nd for the pseudobinary system…
Abstract It is not an overstatement to say that natural rubber (NR) is one of the most used polymers. There are numerous studies dealing with the structural aspects of rubber which give rise to its elastic property. However, it should be emphasized that the majority of these studies are generally concerned with rubber…
The luminescent properties of hexagonal have been investigated. For and at room temperature, excitation into the Ce 3+ ion results mainly in Tb 3+ emission. We also observed two different Ce 3+ emissions. This is related to the crystal structure of . It is shown that the excitation energy migrates from the Ce 3+ ion o…
By using a recently developed theoretical model, which takes into proper account on a statistical basis the contributions to energy dissipation deriving from microscopic magnetization processes, a general loss expression is obtained, which permits one to compute total power losses, just knowing two parameters. These c…
The population dynamics of dominant planktonic diatoms during the eutrophication of Mondsee, Austria, are described by analysis of a 36 cm in situ frozen sediment core from the profundal region using tape peel preparation techniques; the results are compared with data from plankton investigations. The development of M…