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Showing 1 to 12 of 214 entries
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[Congresses of pediatricians in the USSR and their role in development of Soviet pediatrics].

Pediatriia

Lebedev DD, Semenova EI.
PMID: 927992
Pediatriia. 1977 Oct;(10):52-8.

No abstract available.

No Significant Effect of Prefrontal tDCS on Working Memory Performance in Older Adults.

Frontiers in aging neuroscience

Nilsson J, Lebedev AV, Lövdén M.
PMID: 26696882
Front Aging Neurosci. 2015 Dec 14;7:230. doi: 10.3389/fnagi.2015.00230. eCollection 2015.

Transcranial direct current stimulation (tDCS) has been put forward as a non-pharmacological alternative for alleviating cognitive decline in old age. Although results have shown some promise, little is known about the optimal stimulation parameters for modulation in the cognitive...

Switchable Synthesis of 4,5-Functionalized 1,2,3-Thiadiazoles and 1,2,3-Triazoles from 2-Cyanothioacetamides under Diazo Group Transfer Conditions.

The Journal of organic chemistry

Filimonov VO, Dianova LN, Galata KA, Beryozkina TV, Novikov MS, Berseneva VS, Eltsov OS, Lebedev AT, Slepukhin PA, Bakulev VA.
PMID: 28328204
J Org Chem. 2017 Apr 21;82(8):4056-4071. doi: 10.1021/acs.joc.6b02736. Epub 2017 Apr 03.

High yield solvent-base-controlled, transition metal-free synthesis of 4,5-functionalized 1,2,3-thiadiazoles and 1,2,3-triazoles from 2-cyanothioacetamides and sulfonyl azides is described. Under diazo transfer conditions in the presence of a base in an aprotic solvent 2-cyanothioacetamides operating as C-C-S building blocks produce...

Nonlinear fluctuation effects in dynamics of freely suspended films.

Physical review. E, Statistical, nonlinear, and soft matter physics

Kats EI, Lebedev VV.
PMID: 25871131
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Mar;91(3):032415. doi: 10.1103/PhysRevE.91.032415. Epub 2015 Mar 31.

Long-scale dynamic fluctuation phenomena in freely suspended films is analyzed. We consider isotropic films that, say, can be pulled from bulk smectic-A liquid crystals. The key feature of such objects is possibility of bending deformations of the film. The...

Electrostatic Self-Assembly of Diamond Nanoparticles onto Al- and N-Polar Sputtered Aluminum Nitride Surfaces.

Nanomaterials (Basel, Switzerland)

Yoshikawa T, Reusch M, Zuerbig V, Cimalla V, Lee KH, Kurzyp M, Arnault JC, Nebel CE, Ambacher O, Lebedev V.
PMID: 28335345
Nanomaterials (Basel). 2016 Nov 17;6(11). doi: 10.3390/nano6110217.

Electrostatic self-assembly of diamond nanoparticles (DNPs) onto substrate surfaces (so-called nanodiamond seeding) is a notable technique, enabling chemical vapor deposition (CVD) of nanocrystalline diamond thin films on non-diamond substrates. In this study, we examine this technique onto differently polarized...

Effusive atomic oven nozzle design using an aligned microcapillary array.

The Review of scientific instruments

Senaratne R, Rajagopal SV, Geiger ZA, Fujiwara KM, Lebedev V, Weld DM.
PMID: 25725821
Rev Sci Instrum. 2015 Feb;86(2):023105. doi: 10.1063/1.4907401.

We present a simple and inexpensive design for a multichannel effusive oven nozzle which provides improved atomic beam collimation and thus extended oven lifetimes. Using this design, we demonstrate an atomic lithium source suitable for trapped-atom experiments. At a...

Two different modes of nested wire array Z-pinch implosions.

Physical review letters

Lebedev SV, Aliaga-Rossel R, Bland SN, Chittenden JP, Dangor AE, Haines MG, Zakaullah M.
PMID: 11017606
Phys Rev Lett. 2000 Feb 21;84(8):1708-11. doi: 10.1103/PhysRevLett.84.1708.

Two different modes of nested wire array implosion driven by a 1-MA, 240-ns current pulse were observed, determined by the fraction of total current induced in the inner array. Penetration by the outer array through the inner with switching...

Turbulent dynamics of polymer solutions.

Physical review letters

Balkovsky E, Fouxon A, Lebedev V.
PMID: 10990791
Phys Rev Lett. 2000 May 15;84(20):4765-8. doi: 10.1103/PhysRevLett.84.4765.

We study properties of dilute polymer solutions. The probability density function (PDF) of polymer end-to-end extensions R in turbulent flows is examined. We show that if the value of the Lyapunov exponent lambda is smaller than the inverse molecular...

Cyclization of ortho-cyclopropylphenyl benzamides in gas and liquid phases.

Journal of the American Society for Mass Spectrometry

Lebedev AT, Dianova IV, Mochalov SS, Lobodin VV, Samguina TY, Gazzaeva RA.
PMID: 11506228
J Am Soc Mass Spectrom. 2001 Aug;12(8):956-63. doi: 10.1016/s1044-0305(01)00277-x.

The electron ionization (EI) and collision-induced dissociation (CID) spectra of substituted N-(ortho-cyclopropylphenyl)benzamides 1-7 and N-[ortho-(1-methylcyclopropyl)phenyl]benzamides 8-12 were recorded. In addition to routine bond cleavages, the molecular ions (M+) of 1-12 undergo cyclization into the corresponding 3-aryl-1-alkyl-1-ethyl-1H-benzoxazines and isomeric 5-ethyl-2-oxodibenzoazepines....

Decay of scalar turbulence revisited.

Physical review letters

Chertkov M, Lebedev V.
PMID: 12570491
Phys Rev Lett. 2003 Jan 24;90(3):034501. doi: 10.1103/PhysRevLett.90.034501. Epub 2003 Jan 23.

We demonstrate that at long times the rate of passive scalar decay in a turbulent, or simply chaotic, flow is dominated by regions where mixing is less efficient. We examine two situations. The first is of a spatially homogeneous...

Seismic evidence for olivine phase changes at the 410- and 660-kilometer discontinuities.

Science (New York, N.Y.)

Lebedev S, Chevrot S, van der Hilst RD.
PMID: 12016311
Science. 2002 May 17;296(5571):1300-2. doi: 10.1126/science.1069407.

The view that the seismic discontinuities bounding the mantle transition zone at 410- and 660-kilometer depths are caused by isochemical phase transformations of the olivine structure is debated. Combining converted-wave measurements in East Asia and Australia with seismic velocities...

Dynamics of cylindrically converging precursor plasma flow in wire-array Z -pinch experiments.

Physical review. E, Statistical, nonlinear, and soft matter physics

Bott SC, Lebedev SV, Ampleford DJ, Bland SN, Chittenden JP, Ciardi A, Haines MG, Jennings C, Sherlock M, Hall G, Rapley J, Beg FN, Palmer J.
PMID: 17155178
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Oct;74(4):046403. doi: 10.1103/PhysRevE.74.046403. Epub 2006 Oct 12.

This paper summarizes the present understanding of the processes leading to precursor column formation in cylindrical wire arrays on the 1 MA MAGPIE generator at Imperial College London. Direct experimental measurements of the diameter variation during the collapse and...

Showing 1 to 12 of 214 entries