排序方式: 共有43条查询结果,搜索用时 31 毫秒
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Alves GA Amato S Anjos JC Appel JA Astorga J Bracker SB Cremaldi LM Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Halling AM Jedicke R Karchin PE Kwan S Leuking LH Mantsch PM de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Passmore D Rafatian A dos Reis AC Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wallace A Wu Z 《Physical review D: Particles and fields》1994,49(9):R4317-R4320
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Alves GA Amato S Anjos JC Appel JA Astorga J Bracker SB Cremaldi LM Dagenhart WD Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Jedicke R Karchin PE Kennedy C Kwan S Lueking LH de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Passmore D Rafatian A dos Reis AC Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wallace A Wu Z 《Physical review letters》1996,77(12):2388-2391
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Alves GA Amato S Anjos JC Appel JA Bracker SB Cremaldi LM Darling CL Dixon RL Errede D Fenker HC Gay C Green DR Jedicke R Kaplan D Karchin PE Kwan S Leedom I Lueking LH Luste GJ Mantsch PM de Mello Neto JR Metheny J Milburn RH de Miranda JM da Motta Filho H Napier A Rafatian A dos Reis AC Reucroft S Ross WR Santoro AF Sheaff M Souza MH Spalding WJ Stoughton C Streetman ME Summers DJ Takach SF Wu Z 《Physical review letters》1993,70(6):722-725
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M.K. Bowman J.R. Norris M.C. Thurnauer J. Warden S.A. Dikanov Yu.D. Tsvetkov 《Chemical physics letters》1978,55(3):570-574
The electron spin echo envelope modulation of the chlorophyll a radical cation has been examined for radicals containing 14N and 15N. The modulation is found to be due primarily to the nitrogen nuclei in the heterocycle and the nuclear quadrupole interaction plays a large part in determining the modulation from 14N. The modulation from 15N allows limits to be set on the isotropic and anisotropic hyperfine interactions. 相似文献
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N M Lacoff J E Franke J T Warden 《Journal of chemical information and computer sciences》1990,30(1):42-48
A computer-aided time-resolved electron paramagnetic resonance (EPR) spectrometer implemented under version 2.9 BSD Unix was developed by interfacing a Varian E-9 EPR spectrometer and a Biomation 805 waveform recorder to a PDP-11/23A minicomputer having MINC A/D and D/A capabilities. Special problems with real-time data acquisition in a multiuser, multitasking Unix environment, addressing of computer main memory for the control of hardware devices, and limitation of computer main memory were resolved, and their solutions are presented. The time-resolved EPR system and the data acquisition and analysis programs, written entirely in C, are described. Furthermore, the benefits of utilizing the Unix operating system and the C language are discussed, and system performance is illustrated with time-resolved EPR spectra of the reaction center cation in photosystem 1 of green plant photosynthesis. 相似文献
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V. A. Ivanshin R. Schauwecker M. Warden P. Erhart H. Keller H. -J. Guentherodt H. P. Lang V. Thommen-Geiser 《Physica C: Superconductivity and its Applications》1996,260(3-4):167-172
Methods of electron-spin resonance (ESR) and direct, non-linear field-modulated microwave absorption (FMMA) were applied for the measurements in low- and high-purity samples of rubidium-doped fullerene, Rb3C60. The coexistence of the normal strong ESR signals and regular series of weak absorption lines similar to those seen in systems of Josephson junctions was observed in the high-purity sample. The possible influence of the vortex lattice on the ESR signals was also studied. We determined from FMMA investigations using the Portis model the critical field μ0H* = 40 μT, the depinning current density Jc*(μ0H0 = 1 mT) 4 × 108 A/m2 in low magnetic field and Jc*(μ0H0 > 100 mT) 1.6 × 108 A/m2 in higher fields. These values were generally one order of magnitude higher than the highest corresponding values previously observed in high-temperature superconductors (HTS's). 相似文献
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The history of mathematics and science integration in American schools can be illustrated through the use of a continuum which runs from math for math's sake at one end to science for science's sake at the other. True integration occurs at the center point. While published examples of integration focusing on process skills are common, those featuring integration of content are less often found. Two such lessons, developed around radioactive decay and efficiency in nature, are presented as examples of science and mathematics concepts taught in concert. Changes in preservice and in-service teacher training must occur if the potential for this type of integration is to be realized. 相似文献