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41.
Howard Alper Nathalie Hamel James B. Woell David J.H. Smith 《Tetrahedron letters》1985,26(19):2273-2274
Esters are isolated in fine yields from the rhodium(I) catalyzed reaction of benzyl chlorides with borate esters and carbon monoxide, in the presence of potassium iodide. 相似文献
42.
43.
Thioketones react with molybdenum hexacarbonyl in tetrahydrofuran (60–65°C, 2–3 h) to give molybdenum pentacarbonyl complexes in 52–80% yield. Geometric isomers were isolated in the case of thiocamphor. 相似文献
44.
45.
P. Alper P. H. Armitage C. S. Smith 《The Journal of the Operational Research Society》1967,18(2):93-103
The paper describes the setting up of models of the educational system and their use in decision-making. The methodological problems of planning and controlling a large socio-economic system, such as education, are discussed. 相似文献
46.
Alcohols, able to form stable carbanions, are deoxygenated to hydrocarbons by treatment with potassium, iron pentacarbonyl, and then hydrochloric acid. Use of an alkyl halide in place of HCl results in reductive alkylation. 相似文献
47.
48.
B. Alper H. Becker A. Berglund I. Blakey G. Blanar M. Bowler R. Cashmore M. Cerrada V. Chabaud C. Damerell C. Daum H. Dietl A. Dwurazny J. Gallivan A. Gillman M. Glaubman A. Gonzalez-Arroyo J. Hardwick A. Zalewska 《Physics letters. [Part B]》1980,94(3):422-426
Evidence is given for the existence of a spin-5 boson resonance from the analysis of the reaction π?p→K+K?n at 62 GeV incident momentum. A simplified amplitude analysis with a Breit-Wigner ansatz leads to a mass 2307 ± 6 MeV and a width of 245 ± 20 MeV. The quantum numbers of the resonance are JP = 5?, C = ?1, and very probably IG = 1+. 相似文献
49.
Hakan Kockar Mursel Alper Turgut Sahin Oznur Karaagac 《Journal of magnetism and magnetic materials》2010,322(9-12):1095-1097
Co–Fe films were electrodeposited on polycrystalline Titanium substrates from the electrolytes with different pH levels. X-ray diffraction (XRD) was used to study the crystal structure of the films. The XRD patterns showed that the films grown at the pH levels of 3.70 and 3.30 have a mixed phase consisting of face-centred cubic (fcc) and body-centred cubic, while those grown at pH=2.90 have only fcc structure. It was observed that the film composition, by energy dispersive x-ray spectroscopy, contain around 88 at% Co and 12 at% Fe for all films investigated in this study. Morphological observations indicated that all films have grainy structure with the slight change of grain size depending on the electrolyte pH. Magnetoresistance measurements, made at room temperature, showed that all films exhibited anisotropic magnetoresistance, which is affected by the electrolyte pH. From the magnetic measurements made by vibrating sample magnetometer, the saturation magnetization increases as the electrolyte pH decreases. Furthermore, all films have in-plane easy-axis direction of magnetization. 相似文献
50.
Hakan Kockar Mursel Alper Oznur Karaagac Nuri Nakiboglu M. Celalettin Baykul 《Journal of magnetism and magnetic materials》2010,322(9-12):1088-1091
The influence of electrolyte pH and cathode potential on the magnetic properties of single layer Nickel films electrodeposited on polycrystalline titanium substrates was studied. The films were deposited at the electrolyte pH=3.5±0.1, 2.5±0.1 and 2.1±0.1 by varying the deposition potentials (?1.2, ?1.5 and ?1.8 V vs saturated calomel electrode, SCE) applied in continuous waveform. The structural analysis by X-ray diffraction revealed that the films have face-centred cubic structure. Results of the magnetic measurements obtained by vibrating sample magnetometer (VSM) indicated that the magnetic properties were affected by the electrolyte pH and the cathode potentials in terms of magnetic anisotropy. At the highest pH the films deposited at the lowest potential had in-plane magnetic anisotropy. As the electrolyte pH decreased from the high (pH=3.5±0.1) to low (pH=2.5±0.1), which is aided by increasing the potentials, resulted in an almost magnetic isotropy in the films. However, isotropic magnetic behaviour was observed for the film deposited at the low pH combined with the high potential (?1.8 V vs SCE). Magnetic thickness profile of the samples obtained by VSM revealed that the isotropic films have a smoother magnetic variation across the film from one edge than the anisotropic ones. This is also verified with a microscopic observation by an optical microscope and the surface of the isotropic films is observed to be smoother than that of the anisotropic ones. Furthermore, all films were found to have planar magnetic anisotropy irrespective of the pH’s and the potentials. 相似文献