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41.
Timur R. Galeev Constantin Romanescu Wei‐Li Li Lai‐Sheng Wang Alexander I. Boldyrev 《ChemInform》2012,43(19):no-no
TaB10‐ and NbB10‐ clusters are produced in a laser‐vaporization supersonic molecular beam cluster source and characterized by photoelectron spectroscopy. 相似文献
42.
Li WL Romanescu C Galeev TR Piazza ZA Boldyrev AI Wang LS 《Journal of the American Chemical Society》2012,134(1):165-168
We report the observation of two transition-metal-centered nine-atom boron rings, Rh?B(9)(-) and Ir?B(9)(-). These two doped-boron clusters are produced in a laser-vaporization supersonic molecular beam and characterized by photoelectron spectroscopy and ab initio calculations. Large HOMO-LUMO gaps are observed in the anion photoelectron spectra, suggesting that neutral Rh?B(9) and Ir?B(9) are highly stable, closed shell species. Theoretical calculations show that Rh?B(9) and Ir?B(9) are of D(9h) symmetry. Chemical bonding analyses reveal that these complexes are doubly aromatic, each with six completely delocalized π and σ electrons, which describe the bonding between the central metal atom and the boron ring. This work establishes firmly the metal-doped B rings as a new class of novel aromatic molecular wheels. 相似文献
43.
V. M. Vinokurov A. R. Al-Soufi A. A. Galeev N. M. Khasanova G. R. Bulka N. M. Nizamutdinov 《Applied magnetic resonance》1994,7(2-3):323-337
The expansion of the {B 2} and {B 4} tensors of the spin Hamiltonian (SH) for Mn2+ (6S-state) is performed in terms of the irreducible tensor products {V L 1 ?V L 2}2 and {V L 1 ?V L 2}4 of the crystal field (CF) tensors {V L 1} and {V L 2}. The EPR spectra of Mn2+ in the ZnSeO4·6H2O crystal are studied and the SH tensors {B 2} and {B 4} are calculated. The tensors {V 4?V 4}2 and {V 4?V 4}4 are computed using the point-charge model (PCM) of the [Zn(H2O)6] complex with the C2 symmetry and are compared with the SH tensors {B 2} and {B 4}, respectively. The correct signs of the elements and the pseudo-symmety axes of the tensors are obtained both for the {B 2} tensor and {V 4?V 4}2 and for the {B 4} tensor and {V 4?V 4}4. It is concluded that the irreducible tensor products {V 4?V 4}2 and {V 4?V 4}4 provide the predominant contribution respectively to the SH tensors {B 2} and {B 4} of Mn2+. 相似文献
44.
É. M. Galeev 《Mathematical Notes》1996,59(2):133-140
We consider the linear widths
N
(W
p
r
(Tn), Lq) and
N
(H
p
r
(Tn), Lq) of the classesW
p
r
(Tn) andH
p
r
(Tn) of periodic functions of one or several variables in the spaceL
q. For the Sobolev classesW
p
r
(Tn) of functions of one or several variables, we state some well-known results without proof; for the Hölder-Nikol'skii classesH
p
r
(Tn), we state some well-known results, prove some new results, and present some previously unpublished proofs.Translated fromMatematicheskie Zametki, Vol. 59, No. 2, pp. 189–199, February, 1996.This research was partially supported by the Russian Foundation for Basic Research under grant No. 93-01-00237 and by the International Science Foundation under grant No. MP1000. 相似文献
45.
R. V. Galeev L. N. Gunderova A. Kh. Mamleev N. M. Pozdeev 《Journal of Structural Chemistry》1995,36(3):386-391
An analysis of the microwave spectrum of acetyl chloride (12CH3
12C16O35Cl) in the ground vibrational state allowed us to determine the quartic constants of centrifugal distortion and to refine
the rotational constants and the constants of quadrupole coupling of35Cl nuclei in this compound. The Stark effect of the 0–111 transition has been measured and analyzed. The components of the dipole moment have been determined: μa=1.047(10) D and μb=2.503(4) D. The total dipole moment of the moment of the molecule is 2.713(8) D.
Ufa Scientific Center of Russian Academy of Sciences, Physics Department. Translated fromZhurnal Struktumoi Khimii, Vol. 36, No. 3, pp. 424–429, May–June, 1995.
Translated by I. Izvekova 相似文献
46.
R. I. Khusnutdinov V. A. Dokichev D. K. Galeev N. F. Asylguzhina S. Z. Sultanov U. M. Dzhemilev 《Russian Chemical Bulletin》1988,37(9):1932-1935
1. | Catalytic dimerization of spiro[2.4]hepta-4,6-diene (I) into dispirocyclopropan-5,1'-endotricyclo [5.2.1.02,6]deca-3,8-dien-10,1-cyclopropane (II) was carried out. |
2. | It was established that [Rh(CO)2Cl]2 catalyzes transformation of dispirocyclopropan-6,1'-pentacyclo [5.3.0.02,5.03,9.04,8]-decan-10,1-cyclopropane (XI) into the dimer spiro[2.4]hepta-4,6-diene (II). |
3. | Upon reduction of dispirocyclopropan-6,l'-pentacyclo[5.3.0.02,5.03,9.04.8]decan-<>-cyclopropane in the presence of PtO2 1,1,3,3-tetramethyl-1,3-bishomocubane is formed. |
4. | The possibility of synthesizing adamantane, diamantane, and their derivatives by skeletal isomerization of hydrocarbons obtained from spiro[2.4]hepta-4,6-diene has been shown. |
47.
Stepanova E. E. Krasokha M. O. Galeev A. R. Dmitriev M. V. Maslivets A. N. 《Russian Journal of Organic Chemistry》2018,54(11):1735-1738
Russian Journal of Organic Chemistry - 1,6-Diarylhexane-1,3,4,6-tetraones react with o-aminothiophenol forming 3-aryl-1-(1,3-benzothiazol-2-yl)-3-hydroxyprop-2-en-1-ones. 相似文献
48.
49.
L. V. Mingalieva Violeta K. Voronkova R. T. Galeev A. A. Sukhanov S. Melnik D. Prodius K. I. Turta 《Applied magnetic resonance》2010,37(1-4):737-750
Electron paramagnetic resonance (EPR) of a new compound {[Nd2(α-C4H3OCOO)6(H2O)2]} n composed of Nd3+–Nd3+ dimers is reported. The anisotropy parameters of the spin–spin interaction are determined by fitting experimental and simulated spectra in X- and Q-bands. It is shown that the anisotropy of the exchange interaction gives the main contribution to the anisotropy of the spin–spin interaction. The observed anisotropy disagrees with the expected in the model of the isotropic exchange interaction between real spins. A feature of the EPR spectrum not described by the model of the isolated Nd–Nd dimers and reflecting the magnetization transfer between dimers is detected. The magnetization transfer due to both the relaxation transitions and the interdimer interaction is considered. 相似文献
50.