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1.
2.
Translation planes of order q
2 containing non-Desarguesian Baer subplanes are used to construct transversal-free translation nets with very small deficiencies. Also, a generalization of the ideas of Bruen shows that any non-Desarguesian spread in PG(3, q) produces a transversal-free net of small deficiency. 相似文献
3.
Vikram S. Deshpande Milan Mrksich Anthony G. Evans 《Journal of the mechanics and physics of solids》2008,56(4):1484-1510
Focal adhesions (FAs) are large, multi-protein complexes that provide a mechanical link between the cytoskeletal contractile machinery and the extracellular matrix. They exhibit mechanosensitive properties; they self-assemble upon application of pulling forces and dissociate when these forces are decreased. We rationalize this mechano-sensitivity from thermodynamic considerations and develop a continuum framework in which the cytoskeletal contractile forces generated by stress fibers drive the assembly of the FA multi-protein complexes. The FA model has three essential features: (i) the low and high affinity integrins co-exist in thermodynamic equilibrium, (ii) the low affinity integrins within the plasma membrane are mobile, and (iii) the contractile forces generated by the stress fibers are in mechanical equilibrium and change the free energies of the integrins. A general two-dimensional framework is presented and the essential features of the model illustrated using one-dimensional examples. Consistent with observations, the coupled stress fiber and FA model predict that (a) the FAs concentrate around the periphery of the cell; (b) the fraction of the cell covered by FAs increases with decreasing cell size while the total FA intensity increases with increasing cell size; and (c) the FA intensity decreases substantially when cell contractility is curtailed. 相似文献
4.
This paper is a straightforward generalization of Maierle-Harris proposal regarding parity implications on the superpositions of chiral states of a molecule. It is shown that the inclusion of electric quadrupole and magnetic dipole interactions removes several of restrictions on the preparation of superpositions of mid R:L and mid R:R states of a chiral molecule. It is also found that the dephasing of mid R:L and mid R:R superpositions, due to the spontaneous emission from the chiral molecule, has opposing contributions from electric quadrupole-magnetic dipole and electric dipole interactions. 相似文献
5.
[reaction: see text] The enzymatic degradation of starch can be monitored electronically using single-walled carbon nanotubes (SWNTs) as semiconducting probes in field-effect transistors (FETs). Incubation of these devices in aqueous buffer solutions of amyloglucosidase (AMG) results in the removal of the starch from both the silicon surfaces and the side walls of the SWNTs in the FETs, as evidenced by direct imaging and electronic measurements. 相似文献
6.
Vikram S. Kushawaha 《Chemical physics letters》1980,72(3):451-454
A laser-induced chemical reaction of I2 + C2H2 has been studied and the formation of cis and tians isomers of 1,2-diiodoethylene has been observed. The ratio of the two isomers of 1,2-diodoethylene changes markedly upon changing the laser wavelengths of excitation of the I2 molecule 相似文献
7.
M. B. Gavini F. G. Rocco S. M. Kim 《Journal of Radioanalytical and Nuclear Chemistry》1981,67(2):437-444
A new and economical method for assay of environmental samples for uranium isotopes is proposed. Separation and radiochemical
purification of uranium isotopes (234U,235U and238U) from other elements is achieved on a single anion exchange column by washing with various concentrations of hydrochloric
acid. Iron, the principal interfering element is removed from the colum by washing with 4.5M hydrochloric acid with a combination
of reducing agents under the conditions described. Weightless samples of uranium are prepared by either evaporation in a polished
stainless steel dish or electroplated on a stainless steel planchet. This method is applicable for air particulates, soils,
sediments, coal, water, vegetation, and biologicals.
Text of the paper presented in the symposium on Practical Applications of Nuclear and Radiochemistry, at Las Vegas, Nevada,
August 25–29, 1980. Submitted for publication in Advances in Chemistry Series. 相似文献
8.
Improvement on Quantum Teleportation of Three and Four Qubit States Using Multi-Qubit Cluster States
Verma Vikram Singh Nidhi Singh Ravi S. 《International Journal of Theoretical Physics》2021,60(10):3973-3981
International Journal of Theoretical Physics - In 2016, Li et al. [Int. J. Theor. Phys. 55, 1820–1823 (2016)] proposed schemes for quantum teleportation of certain class of three and four... 相似文献
9.
10.