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排序方式: 共有61条查询结果,搜索用时 46 毫秒
1.
Lemcoff NG Spurlin TA Gewirth AA Zimmerman SC Beil JB Elmer SL Vandeveer HG 《Journal of the American Chemical Society》2004,126(37):11420-11421
Dendrimers with molecular weights ranging from ca. 2700 to 11 000 and from 16 to 64 homoallyl ether end groups were cross-linked using the Grubbs ring-closing metathesis reaction. A combination of SEC, MALDI-TOF-MS, and AFM were used to characterize the cross-linked nanoparticles. The data suggest a significant decrease in volume with cross-linking and a concomitant increase in rigidity, both of which can be controlled independently with a fair degree of precision. 相似文献
2.
The response function, which is directly related to the cross section for inelastic scattering of electrons from nuclear matter, is calculated with the help of a time-dependent perturbation theory using a separable potential. All diagrams through second order in the interaction are computed and their contributions compared. The self-energy problem is examined, and it is concluded that a Hartree-Fock approximation is preferable to one which attempts to takeK-matrix insertions into account. Results for the response function are compared with those of previous workers. 相似文献
3.
A molecularly imprinted dendrimer (MID) with a colorimetric reporter group exhibits three-point binding of tris(aminoethyl)amine in THF with a K(assoc)= 3.3 x 10(6) M(-1). 相似文献
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5.
H. Beil R. Bergère P. Carlos A. Leprêtre A. De Miniac A. Veyssière 《Nuclear Physics A》1974,227(3):427-449
By using a variable monochromatic photon beam, the partial photoneutron cross sections σ(γ, n) + σ(γ, pn), σ(γ, 2n) and σ(γ, 3n) are determined in the region of the giant dipole resonance for the doubly even Mo isotopes 92Mo, 94Mo, 96Mo, 98Mo and 100Mo. Measured integrated photoneutron cross sections are compared with available integrated photoproton cross sections as a function of A. Broadening of the giant dipole resonance as A increases is observed in good agreement with the predictions of the dynamic collective model. A tentative study of some isospin splitting effects is also carried out. 相似文献
6.
P. Carlos H. Beil R. Bergère J. Fagot A. Leprêtre A. Veyssière G.V. Solodukhov 《Nuclear Physics A》1976,258(2):365-387
The partial photoneutron cross sections [σ(γ, n) + σ(γ, pn)] and σ(γ, 2n) of 64Zn, Ga, 70,72,74,76Ge, 75As and 76,78,80,82Se were measured with a monochromatic photon beam and a high efficiency neutron detecting system in the photon-energy range 8 ≦ E ≦ 30 Me V. Integrated cross sections are discussed. The evolution of the GDR as observed through the neutron exit channel only, is tentatively interpreted either in terms of isospin splitting or in terms of the dynamic collective model. 相似文献
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8.
Dr. Bugga Balakrishna Arjun Menon Dr. Kecheng Cao Sebastian Gsänger Dr. Sebastian B. Beil Julia Villalva Oleksandr Shyshov Oliver Martin Prof. Dr. Andreas Hirsch Prof. Dr. Bernd Meyer Prof. Dr. Ute Kaiser Prof. Dr. Dirk M. Guldi Prof. Dr. Max von Delius 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(42):18933-18945
9.
Sebastian B. Beil Timo Müller Sydney B. Sillart Peter Franzmann Alexander Bomm Michael Holtkamp Prof. Dr. Uwe Karst Prof. Dr. Wolfgang Schade Prof. Dr. Siegfried R. Waldvogel 《Angewandte Chemie (International ed. in English)》2018,57(9):2450-2454
A new and powerful active anode system that can be operated in 1,1,1,3,3,3‐hexafluoro‐2‐propanol (HFIP) has been discovered. In HFIP the molybdenum anode forms a compact, conductive, and electroactive layer of higher‐valent molybdenum species. This system can replace powerful but stoichiometrically required MoV reagents for the dehydrogenative coupling of aryls. This electrolytic reaction is more sustainable and allows the conversion of a broad scope of activated arenes. 相似文献
10.
We report on crystal growth, spectroscopy, thermal conductivity and (4)I(11/2)→(4)I(13/2)-laser performance of Er:Lu(2)O(3). Pumping with an optically pumped semiconductor laser at 971 nm, 1.4 W of cw output power with a slope efficiency of ~36% at 2.85 μm was obtained at room temperature. This exceeds the Stokes efficiency due to an upconversion process recycling population of the lower laser level back into the upper laser level, yielding the highest efficiency of any Er-sesquioxide laser around 3 μm. Under diode pumping, 5.9 W of output power with 27% of slope efficiency was achieved with an M(2) of 1.2 to 1.4. 相似文献