全文获取类型
收费全文 | 310篇 |
免费 | 3篇 |
专业分类
化学 | 69篇 |
晶体学 | 1篇 |
力学 | 3篇 |
数学 | 141篇 |
物理学 | 99篇 |
出版年
2015年 | 4篇 |
2011年 | 5篇 |
2010年 | 3篇 |
2008年 | 3篇 |
2007年 | 4篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 9篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 8篇 |
1992年 | 8篇 |
1990年 | 5篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 3篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 8篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1974年 | 7篇 |
1973年 | 7篇 |
1970年 | 3篇 |
1969年 | 7篇 |
1935年 | 3篇 |
1933年 | 10篇 |
1930年 | 5篇 |
1929年 | 10篇 |
1927年 | 4篇 |
1926年 | 8篇 |
1924年 | 4篇 |
1922年 | 7篇 |
1920年 | 3篇 |
1919年 | 5篇 |
1918年 | 3篇 |
1912年 | 3篇 |
1909年 | 4篇 |
1908年 | 3篇 |
1907年 | 4篇 |
1906年 | 4篇 |
1903年 | 3篇 |
排序方式: 共有313条查询结果,搜索用时 8 毫秒
61.
B. V. Landau 《Foundations of Physics》1984,14(6):507-534
The Wigner distribution and its equation of motion in the scalar potential case are arrived at in an unusual way. This in turn suggests (a) a departure from the standard Wigner distribution treatment for a charged particle in a magnetic field and (b) a new approach to quantization of nonconservative systems. Suggestion (a) is found to be, like the standard treatment, in agreement with Schrödinger's equation but, unlike it, also satisfies local classical-type conservation laws and employs a distribution which is gauge-invariant rather than merely gauge-covariant. Suggestion (b) gives a clear result only in the case of resistance proportional to velocity, when it agrees with the Schrödinger-Langevin equation; for other dissipative systems a fresh assumption is required, and a proposal in that direction is put forward. 相似文献
62.
63.
64.
65.
66.
Landau A. Zaban A. Lapides I. Yariv S. 《Journal of Thermal Analysis and Calorimetry》2002,70(1):103-113
The mechanochemical solid-state adsorption of the cationic dye rhodamine-6G (R6G) by montmorillonite was investigated by XRD
and simultaneous DTA-TG. Five different mixtures of R6G and montmorillonite were investigated. They contained 10, 20, 35,
50 and 100 mmol R6G per 100 g clay. The solid R6G was ground with the clay for five minutes. Mixtures were ground both in
the absence of water (dry grinding) and with the adding of drops of water periodically, (wet grinding). There were no differences
between samples obtained by wet or dry grinding. X-ray and DTA data were compared with those of R6G-montmorillonite obtained
from aqueous suspensions. The mechanochemical products were different from those obtained from aqueous suspensions. The X-ray
and DTA studies suggest that the mechanochemical adsorption of organic cations takes place on the external surfaces of the
clay whereas in suspensions the adsorption takes place into the interlayer space. In the latter case the final stages of oxidation
occur in temperatures higher than those of the neat dye whereas in the former they occur at lower temperatures.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
67.
68.
Edmund Landau 《Mathematische Annalen》1908,66(1):102-105
Ohne Zusammenfassung 相似文献
69.
Edmund Landau 《Mathematische Annalen》1903,56(4):671-676
Ohne Zusammenfassung 相似文献
70.
Stimuli‐Responsive Lipidic Cubic Phase: Triggered Release and Sequestration of Guest Molecules 下载免费PDF全文
Dr. Nelli Rahanyan‐Kägi Dr. Simone Aleandri Chiara Speziale Prof. Raffaele Mezzenga Prof. Ehud M. Landau 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(5):1873-1877
New stimuli‐responsive nanomaterials, made up of host–guest lipidic cubic phases (LCPs) are presented. These biocompatible, stable, transparent and water‐insoluble LCPs are composed of monoolein (MO) as a neutral host, and small amounts of one of three judiciously designed and synthesized designer lipids as guest that preserve the structure and stability of LCPs, but render them specific functionalities. Efficient pH‐ and light‐induced binding, release and sequestration of hydrophilic dyes are demonstrated. Significantly, these processes can be performed sequentially, thereby achieving both temporal and dosage control, opening up the possibility of using such LCPs as effective carriers to be used in drug delivery applications. Specifically, because of the inherent optical transparency and molecular isotropy of LCPs they can be envisaged as light‐induced drug carriers in ophthalmology. The results presented here demonstrate the potential of molecular design in creating new functional materials with predicted operating mode. 相似文献