全文获取类型
收费全文 | 58篇 |
免费 | 0篇 |
专业分类
化学 | 32篇 |
数学 | 5篇 |
物理学 | 21篇 |
出版年
2020年 | 1篇 |
2013年 | 2篇 |
2012年 | 2篇 |
2011年 | 7篇 |
2010年 | 2篇 |
2009年 | 1篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1998年 | 1篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1984年 | 2篇 |
1982年 | 1篇 |
1974年 | 1篇 |
1964年 | 1篇 |
1943年 | 2篇 |
排序方式: 共有58条查询结果,搜索用时 406 毫秒
31.
Ch. Sannié W. G. Brown H. Flood Ch. Lapp K. Erali H. Brockmann Hella Schodder H. H. Strain P. Ruggli P. Jensen E. Waldschmitt-Leitz P. Fisher-J?rgensen M. T?nnesen G. Schramm J. Primosigh G. -M. Schwab K. Dockers G. Siewert H. Jungnickel Gretl Dattler A. N. Ghosh M. Venturello N. Agliardi H. Dahn H. Erlenmeyer W. Schoenauer J. N. Wison 《Analytical and bioanalytical chemistry》1943,126(3):101-117
32.
33.
Nielsen JH Simesen P Bisgaard CZ Stapelfeldt H Filsinger F Friedrich B Meijer G Küpper J 《Physical chemistry chemical physics : PCCP》2011,13(42):18971-18975
We make use of an inhomogeneous electrostatic dipole field to impart a quantum-state-dependent deflection to a pulsed beam of OCS molecules, and show that those molecules residing in the absolute ground state, X(1)Σ(+), |00(0)0>, J = 0, can be separated out by selecting the most deflected part of the molecular beam. Past the deflector, we irradiate the molecular beam by a linearly polarized pulsed nonresonant laser beam that impulsively aligns the OCS molecules. Their alignment, monitored via velocity-map imaging, is measured as a function of time, and the time dependence of the alignment is used to determine the quantum state composition of the beam. We find significant enhancements of the alignment ( = 0.84) and of state purity (>92%) for a state-selected, deflected beam compared with an undeflected beam. 相似文献
34.
Arts Werner Bretschneider Hans-Joachim Buschhoff Hella Rickert Björn 《Analytical and bioanalytical chemistry》1984,319(5):501-505
Analytical and Bioanalytical Chemistry - Die Betriebserfahrungen mit dem Gerät PAR 384A —mit zwei Elektrodenständen PAR 303 —haben gezeigt, daß die Inversvoltammetrie... 相似文献
35.
Werner Arts Hans-Joachim Bretschneider Hella Buschhoff und Björn Rickert 《Fresenius' Journal of Analytical Chemistry》1984,319(5):501-505
Zusammenfassung Die Betriebserfahrungen mit dem Gerät PAR 384A —mit zwei Elektrodenständen PAR 303 —haben gezeigt, daß die Inversvoltammetrie für die Trinkwasseranalytik auch bei hohem Probenaufkommen geeignet ist. Allerdings bedarf es für eine weite Verbreitung der Methode noch einiges an Verbesserungen und Weiterentwicklungen auf der apparativen Seite:Vervollständigung der Gerätesoftware.Einführung eines automatischen Probewechsels mit Zellenreinigung. Das macht eine weitere Änderung der Hardund Software notwendig, um eine automatische Arbeitsweise (einschließlich schneller Ergebnisausgabe) zu gewährleisten.Zur Zeit bieten weder das neue Metrohm-Gerät noch das weiterentwickelte Modell PAR 384B eine automatische Arbeitsweise.
Differential pulse stripping-voltammetry for routine heavy-metal analysis of drinking water
Summary The experiences in running the PAR 384 A Polarograph — coupled with two electrodes PAR 303 — have shown that the differential pulse stripping-voltammetry is fit for high number of samples too. Nevertheless, for a wide spreading of this method for routine analysis, it is necessary to improve especially the following points:Complement of the software.Installation of an automatic sample-changing with cellcleaning; that means a further improvement of hard- and software to guarantee an automatic way of working with a high output of results.At present, neither the new Metrohm polarograph nor the new PAR 384 B can guarantee automatic working.相似文献
36.
Using tomographic reconstruction we determine the complete internuclear quantum state, represented by the Wigner function, of a dissociating I2 molecule based on femtosecond time resolved position and momentum distributions of the atomic fragments. The experimental data are recorded by timed ionization of the photofragments with an intense 20 fs laser pulse. Our reconstruction method, which relies on Jaynes's maximum entropy principle, will also be applicable to time resolved position or momentum data obtained with other experimental techniques. 相似文献
37.
Bisgaard CZ Poulsen MD Péronne E Viftrup SS Stapelfeldt H 《Physical review letters》2004,92(17):173004
We show experimentally that field-free alignment of iodobenzene molecules, induced by a single, intense, linearly polarized 1.4-ps-long laser pulse, can be strongly enhanced by dividing the pulse into two optimally synchronized pulses of the same duration. For a given total energy of the two-pulse sequence the degree of alignment is maximized with an intensity ratio of 1:3 and by sending the second pulse near the time where the alignment created by the first pulse peaks. 相似文献
38.
Viftrup SS Kumarappan V Trippel S Stapelfeldt H Hamilton E Seideman T 《Physical review letters》2007,99(14):143602
We illustrate, experimentally and theoretically, a laser-based method to control the rotations of polyatomic molecules in 3D space. A linearly polarized nanosecond pulse strongly aligns the most polarizable axis of an asymmetric top molecule along its polarization axis while an orthogonally polarized, femtosecond pulse sets the molecules into controlled rotation about the aligned axis. As a result, strong three-dimensional (3D) alignment occurs shortly after the femtosecond pulse and is repeated periodically, reflecting coherent revolution about the molecular axis. Our method opens new directions for research in orientationally confined complex molecules. 相似文献
39.
We give a sufficient condition for the inexpressibility of the k-th extended vectorization of a generalized quantifier in , the extension of first-order logic by all k-ary quantifiers. The condition is based on a model construction which, given two -equivalent models with certain additional structure, yields a pair of -equivalent models. We also consider some applications of this condition to quantifiers that correspond to graph properties,
such as connectivity and planarity.
Received: 15 October 1996 相似文献
40.