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Showing 1 to 12 of 13 entries
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Plasmonic excitations in metallic nanoparticles: resonances, dispersion characteristics and near-field patterns.

Optics express

Tatartschuk E, Shamonina E, Solymar L.
PMID: 19434179
Opt Express. 2009 May 11;17(10):8447-60. doi: 10.1364/oe.17.008447.

Metamaterials acquire their functionality from the structuring of the small building blocks, "artificial atoms". Our paper provides a study of the resonant behaviour for a variety of metallic nanoparticles in the region of hundreds of THz. Resonant modes for...

Two-wave mixing in (111)-cut Bi12SiO20 and Bi12TiO20 crystals: characterization and comparison with the general orientation.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Kamenov VP, Hu Y, Shamonina E, Ringhofer KH, Gayvoronsky VY.
PMID: 11088769
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Aug;62(2):2863-70. doi: 10.1103/physreve.62.2863.

We study the process of two-wave mixing (TWM) in optically active, electro-optic, and elasto-optic BSO and BTO crystals. We calculate the TWM gain for arbitrary crystal cut and optimize the energy exchange. For the (111) cut, by choosing an...

Theory of photorefractive vectorial wave coupling in cubic crystals.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Sturman BI, Podivilov EV, Ringhofer KH, Shamonina E, Kamenov VP, Nippolainen E, Prokofiev VV, Kamshilin AA.
PMID: 11970148
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Sep;60(3):3332-52. doi: 10.1103/physreve.60.3332.

We present an analytical theory of vectorial wave coupling in photorefractive cubic crystals which are, in general, optically active. The theory is based on the systematic use of the spatial symmetry properties and the apparatus of the Pauli operators...

Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field.

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

Kamenov VP, Shamonina E, Ringhofer KH, Nippolainen E, Prokofiev VV, Kamshilin AA.
PMID: 11304378
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jan;63(1):016607. doi: 10.1103/PhysRevE.63.016607. Epub 2000 Dec 20.

We investigate here both theoretically and experimentally light-induced scattering in (111)-cut Bi12TiO20 crystals with an external ac field. Our simple analytic solution, which is nearly as precise as the numeric one, allows us to recognize the following otherwise hidden...

Natural and hybrid ("chimeric") stable regulatory glyproline peptides.

Pathophysiology : the official journal of the International Society for Pathophysiology

Ashmarin IP, Samonina GE, Lyapina LA, Kamenskii AA, Levitskaya NG, Grivennikov IA, Dolotov OV, Andreeva LA, Myasoedov NF.
PMID: 15837162
Pathophysiology. 2005 May;11(4):179-185. doi: 10.1016/j.pathophys.2004.10.001.

The present concept of relative instability of regulatory peptides (RPs) in organisms must be amended. The recently characterized family of glyprolines and some other prolyl-glycyl-proline (PGP)-containing oligopeptides show the stability quite comparable with those of major pharmacological preparations. The...

Superdirective dimers of coupled self-resonant split ring resonators: Analytical modelling and numerical and experimental validation.

Scientific reports

Vallecchi A, Radkovskaya A, Li L, Faulkner G, Stevens CJ, Shamonina E.
PMID: 31937860
Sci Rep. 2020 Jan 14;10(1):274. doi: 10.1038/s41598-019-56988-6.

Superdirective antennas developed over the last century have received renewed interest in recent years from the development of metamaterials. These arrays of electromagnetic resonators (or meta-atoms) carrying short wavelength electro- and/or magneto-inductive waves support current distributions with very high...

Glyproline peptide family: review on bioactivity and possible origins.

Pathophysiology : the official journal of the International Society for Pathophysiology

Samonina G, Ashmarin I, Lyapina L.
PMID: 12100966
Pathophysiology. 2002 Aug;8(4):229-234. doi: 10.1016/s0928-4680(02)00018-4.

Glyproline peptide family includes the simplest proline-containing linear peptides PG, GP, PGP, respective peptides with hydroxylated proline residues and (with some restriction) cyclic PG. Having close structural resemblance they display many similar bioactivities. The suppression of some reactions of...

Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites.

Optics letters

Shamonina E, Ringhofer KH, Sturman BI, Kamenov VP, Cedilnik G, Esselbach M, Kiessling A, Kowarschik R, Kamshilin AA, Prokofiev VV, Jaaskelainen T.
PMID: 18091808
Opt Lett. 1998 Sep 15;23(18):1435-7. doi: 10.1364/ol.23.001435.

We show theoretically and experimentally that switching an applied square-wave field produces strong and short pulses of the outgoing signal during two-wave mixing in sillenite crystals. These pulses originate from the strong effect of the field on the optical...

2D metamaterials with hexagonal structure: spatial resonances and near field imaging.

Optics express

Zhuromskyy O, Shamonina E, Solymar L.
PMID: 19503131
Opt Express. 2005 Nov 14;13(23):9299-309. doi: 10.1364/opex.13.009299.

The current and field distribution in a 2D metamaterial consisting of resonant elements in a hexagonal arrangement are found assuming magnetic interaction between the elements. The dispersion equation of magnetoinductive (MI) waves is derived with the aid of the...

Magnetoinductive waves in attenuating media.

Scientific reports

Chu S, Luloff MS, Yan J, Petrov P, Stevens CJ, Shamonina E.
PMID: 33828111
Sci Rep. 2021 Apr 07;11(1):7679. doi: 10.1038/s41598-021-85838-7.

The capability of magnetic induction to transmit signals in attenuating environments has recently gained significant research interest. The wave aspect-magnetoinductive (MI) waves-has been proposed for numerous applications in RF-challenging environments, such as underground/underwater wireless networks, body area networks, and...

Antiulcer effects of amylin: a review.

Pathophysiology : the official journal of the International Society for Pathophysiology

Samonina GE, Kopylova GN, Lukjanzeva GV, Zhuykova SE, Smirnova EA, German SV, Guseva AA.
PMID: 15177509
Pathophysiology. 2004 Jul;11(1):1-6. doi: 10.1016/j.pathophys.2003.10.008.

Amylin belongs to the calcitonin peptide family. Amylin is a peptide synthesized not only in the beta cells of pancreatic islets, but in small quantities also in other organs like in the intestinal and gastric mucosa, lungs and central...

Protection of gastric mucosal integrity by gelatin and simple proline-containing peptides.

Pathophysiology : the official journal of the International Society for Pathophysiology

Samonina G, Lyapina L, Kopylova G, Pastorova V, Bakaeva Z, Jeliaznik N, Zuykova S, Ashmarin I.
PMID: 10825688
Pathophysiology. 2000 Apr;7(1):69-73. doi: 10.1016/s0928-4680(00)00045-6.

We have observed that gelatin as feed supplement protected against ethanol-induced mucosal damages in rats. Intraperitoneally given peptides PG and PGP had similar effects. The increase of mucosal integrity may be connected with the change of microcirculation: the peroral...

Showing 1 to 12 of 13 entries