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排序方式: 共有180条查询结果,搜索用时 15 毫秒
51.
B.M. Barnett W. Gyles R.R. Johnson K.L. Erdman J. Johnstone J.J. Kraushaar S. Lepp T.G. Masterson E. Rost D.R. Gill A.W. Thomas J. Alster I. Navon R.H. Landau 《Physics letters. [Part B]》1980,97(1):45-49
A new method using low energy π+ elastic scattering is employed to determine the proton matter distribution of a nucleus relative to an adjacent nucleus differing by one proton. The difference in the rms charge radii of 12C and 11B was determined to be 0.072 ± 0.021 fm with π+ beam energies of 38.6 and 47.7 MeV. 相似文献
52.
53.
I.W. Johnstone D.J. Lockwood M.W.C. Dharma-wardana 《Solid State Communications》1980,36(12):1033-1037
Light scattering from magnons in CsCoBr3 has been measured for temperatures well below the upper antiferromagnetic 3D ordering temperature of TlN = 28 K. These experiments reveal multiple magnon features of energies in the range 90 to 170 cm-1 similar to those found in CsCoCl3 but previously unobserved for the bromide. Prominent features in the spectrum and their temperature dependence are described in terms of a recent theory by Shiba. Other, weaker features are explained by a simple extension of the theory to include fluctuations. A new band is observed at 178 cm-1, whose intensity drops sharply prior to the lower 3D ordering transition at T∥N = 10 K. This band is assigned to magnon-phonon combination scattering. 相似文献
54.
Mathematical Programming - This work is concerned with the classical problem of finding a zero of a sum of maximal monotone operators. For the projective splitting framework recently proposed by... 相似文献
55.
Lauren E. Longobardi Dr. Timothy C. Johnstone Rosalyn L. Falconer Dr. Christopher A. Russell Prof. Dr. Douglas W. Stephan 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(36):12665-12669
The hydroboration of phosphaalkynes with Piers’ borane (HB(C6F5)2) generated unusual phosphaalkenylboranes [RCH=PB(C6F5)2]2 that persisted as dimers in both solution and the solid state. These P2B2 heterocycles underwent ring opening when subjected to nucleophiles, such as pyridine and tert‐butylisocyanide, to yield monomeric phosphaalkenylborane adducts RCH=PB(C6F5)2(L). DFT calculations were performed to probe the nature of the interaction of phosphaalkynes with boranes. 相似文献
56.
A Potent Glucose–Platinum Conjugate Exploits Glucose Transporters and Preferentially Accumulates in Cancer Cells
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Dr. Malay Patra Dr. Timothy C. Johnstone Dr. Kogularamanan Suntharalingam Prof. Stephen J. Lippard 《Angewandte Chemie (International ed. in English)》2016,55(7):2550-2554
Three rationally designed glucose–platinum conjugates (Glc–Pts) were synthesized and their biological activities evaluated. The Glc–Pts, 1 – 3 , exhibit high levels of cytotoxicity toward a panel of cancer cells. The subcellular target and cellular uptake mechanism of the Glc–Pts were elucidated. For uptake into cells, Glc–Pt 1 exploits both glucose and organic cation transporters, both widely overexpressed in cancer. Compound 1 preferentially accumulates in and annihilates cancer, compared to normal epithelial, cells in vitro. 相似文献
57.
A.?Johnstone M.?Uddin A.?PollardEmail author A.?Heenan W.?H.?Finlay 《Experiments in fluids》2004,37(5):673-689
The mean and RMS axial velocity field in the central sagittal plane of an idealized representation of the human extrathoracic airway (ETA) during steady inspiration was studied experimentally using single and X-hot-wire anemometry (HWA). Complementary flow-visualization results illustrate the complex nature of this flow, which includes several regions of separated, secondary, and recirculating flow. Hot-wire experiments attest to this complexity, with several regions of high localized turbulence intensity measured distal to the oropharynx. Physiologically accurate flow rates of 10, 15, 30, 45, 60, 90 and 120 l/min are considered. These flow rates encompass a wide range of respiratory patterns, from normal breathing to the rapid inhalation typically encountered during the use of pharmaceutical aerosol inhalation devices.
相似文献
A. PollardEmail: |
58.
Reaction of aryldichloroisocyanides 1a–e with sodium azide and a phase transfer agent has provided 5-chloro-1-aryl-1H-tetrazoles 2a–e in good yield. In particular, the widely-used intermediate, 5-chloro-1-phenyl-1H-tetrazole 2a, can be produced conveniently and safely in yields approaching 100%. 相似文献
59.
Effective charges are calculated for protons and neutrons in the region of mass 90. It is found that their magnitudes differ
appreciably depending on whether the proton p
1/2 shell is empty or full. The calculated values are compared with values deduced from nuclei with simple configurations, and
from a fit to N=50 data. The empirical values are used in shell-model calculations of quadrupole moments of N=50-58 nuclei.
Received: 16 February 1998 相似文献