全文获取类型
收费全文 | 98篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
化学 | 66篇 |
晶体学 | 2篇 |
力学 | 1篇 |
数学 | 3篇 |
物理学 | 28篇 |
出版年
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2014年 | 4篇 |
2013年 | 4篇 |
2012年 | 2篇 |
2011年 | 4篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2007年 | 8篇 |
2006年 | 2篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 4篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1992年 | 4篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1976年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有100条查询结果,搜索用时 15 毫秒
1.
2.
3.
L. K. Kostov W. Andrejtscheff L. G. Kostova A. Dewald G. Böhm K. O. Zell P. von Brentano 《Zeitschrift für Physik A Hadrons and Nuclei》1994,348(2):79-86
Applying delayed- r.f. coincidences and generalized centroid-shift analysis, nanosecond isomers in some odd-A iodine isotopes are studied in-beam. The reactions106Cd(12C,p2n) and116,118Sn(6Li,3n) have been used. The following half-lives were determined:T
1/2(565 keV)=0.50±0.10 ns andT
1/2(837 keV) =0.90±0.20 ns in115I,T
1/2(687 keV)=5.50±0.50 ns andT
1/2(2418 keV)=4.0±0.50 ns in119I as well asT
1/2(812 keV)=0.35±0.20 ns andT
1/2(445 keV)<0.10 ns=">0.10>121I. A systematics of the absolute probabilities for the transitions deexciting theg
9/2 9/2+ and
11/2 11/2
1
–
band heads in115–125I is presented and discussed.Partly supported by the Bulgarian National Research Foundation under contracts PH14, and PH31 and Kernforschungszentrum Karlsruhe, Stabsabteilung Internationale Beziehungen 相似文献
4.
L. G. Kostova W. Andrejtscheff L. K. Kostov L. Funke E. Will A. I. Vdovin 《Zeitschrift für Physik A Hadrons and Nuclei》1992,342(2):145-148
Using the (,n) reaction, the half-life of the first 11/2– level in97Mo has been determined as T1/2(1437.0 keV)=2.5±0.3 ns by means of the pulsed beam method. The experimentally obtainedB(M2) value between theh
11/2 andg
7/2 configurations in97Mo has been satisfactorily described within the quasiparticle-phonon model usingg
s
eff
=0.6g
s
free
. Similar calculations and comparisons with experminental data have been performed also for95,99Mo as well as for99Ru and101Pd.This work is partly supported by the Bulgarian National Research Foundation 相似文献
5.
6.
7.
T. Iossifova B. Mikhova I. Kostova 《Monatshefte für Chemie / Chemical Monthly》1995,126(11):1257-1264
Summary The isolation and structure elucidation of the secoiridoid hydroxyornoside is described. The behaviour of secoiridoid dilactones on acid methanolysis is discussed.
Ein Secoiridoiddilacton aus der Rinde vonFraxinus ornus
Zusammenfassung Die Isolierung und Strukturaufklärung des Secoiridoids Hydroxyornosid wird beschrieben. Das Verhalten von Secoiridoiddilactonen bezüglich saurer Methanolyse wird diskutiert.相似文献
8.
Kalina Kostova Annalaura Lorenzi-Riatsch Yoshihiko Nakashita Manfred Hesse 《Helvetica chimica acta》1982,65(1):249-251
Synthesis of Macrocyclic Lactones by Ring Enlargement Reaction Treatment of 3-(1-nitro-2-oxocyclohexyl)propanal ( 1 ) prepared by Michael addition of 2-nitrocyclohexanon and acrylaldehyde with methyltri (2-propoxy)tita-nium yielded a mixture of 2 and 3 which was converted into 6-nitro-9-decanolide ( 4 ). 相似文献
9.
10.
The cerium(III) and neodymium(III) complexes of 5‐aminoorotic acid were synthesized and characterized by means of spectral data (IR, Raman, 1H NMR and 13C NMR) and elemental analysis. Significant differences in the IR spectra of the complexes were observed as compared with the spectrum of the ligand. A comparative analysis of the Raman spectra of the complexes with that of the free 5‐aminoorotic acid allowed a straightforward assignment of the vibrations of the ligand groups involved in coordination. 1H NMR and 13C NMR spectra confirmed the formation of the complexes. The ligand and the complexes were tested for the cytotoxic activities on the chronic myeloid leukemia‐derived K‐562, overexpressing the BCR‐ABL fusion protein, and the non‐Hodgkin lymphoma‐derived DOHH‐2, characterized by a rexpression of the antiapoptotic protein bcl‐2 cell lines. The results obtained indicate that the tested compounds exerted a considerable cytotoxic activity upon the evaluated cell lines in a concentration‐dependent manner, which enabled the construction of dose–response curves and the calculation of the corresponding IC50 values. Cytotoxicity towards tumor cells was determined for a broad concentration range. The inorganic salts exerted a very weak cytotoxic effect on these cells that is in contrast to the lanthanide complexes, which exhibited potent cytotoxic activity towards K‐562 and DOHH‐2 cell lines. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献