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Communication: XUV transient absorption spectroscopy of iodomethane and iodobenzene photodissociation.

The Journal of chemical physics

Drescher L, Galbraith MC, Reitsma G, Dura J, Zhavoronkov N, Patchkovskii S, Vrakking MJ, Mikosch J.
PMID: 27394091
J Chem Phys. 2016 Jul 07;145(1):011101. doi: 10.1063/1.4955212.

Time-resolved extreme ultraviolet (XUV) transient absorption spectroscopy of iodomethane and iodobenzene photodissociation at the iodine pre-N4,5 edge is presented, using femtosecond UV pump pulses and XUV probe pulses from high harmonic generation. For both molecules the molecular core-to-valence absorption...

Models of Innate Neural Attractors and Their Applications for Neural Information Processing.

Frontiers in systems neuroscience

Solovyeva KP, Karandashev IM, Zhavoronkov A, Dunin-Barkowski WL.
PMID: 26778977
Front Syst Neurosci. 2016 Jan 05;9:178. doi: 10.3389/fnsys.2015.00178. eCollection 2015.

In this work we reveal and explore a new class of attractor neural networks, based on inborn connections provided by model molecular markers, the molecular marker based attractor neural networks (MMBANN). Each set of markers has a metric, which...

Time-resolved high harmonic spectroscopy of dynamical symmetry breaking in bi-circular laser fields: the role of Rydberg states.

Optics express

Jiménez-Galán Á, Zhavoronkov N, Schloz M, Morales F, Ivanov M.
PMID: 29041594
Opt Express. 2017 Sep 18;25(19):22880-22896. doi: 10.1364/OE.25.022880.

The bi-circular scheme for high harmonic generation, which combines two counter-rotating circular fields with frequency ratio 2:1, has recently permitted to generate high harmonics with essentially circular polarization, opening the way for ultrafast chiral studies. This scheme produces harmonic...

Cell death discovery

Makarev E, Schubert AD, Kanherkar RR, London N, Teka M, Ozerov I, Lezhnina K, Bedi A, Ravi R, Mehra R, Hoque MO, Sloma I, Gaykalova DA, Csoka AB, Sidransky D, Zhavoronkov A, Izumchenko E.
PMID: 28580171
Cell Death Discov. 2017 May 22;3:17022. doi: 10.1038/cddiscovery.2017.22. eCollection 2017.

A subset of patients with oral squamous cell carcinoma (OSCC), the most common subtype of head and neck squamous cell carcinoma (HNSCC), harbor dysplastic lesions (often visually identified as leukoplakia) prior to cancer diagnosis. Although evidence suggest that leukoplakia...

Use of deep neural network ensembles to identify embryonic-fetal transition markers: repression of .

Oncotarget

West MD, Labat I, Sternberg H, Larocca D, Nasonkin I, Chapman KB, Singh R, Makarev E, Aliper A, Kazennov A, Alekseenko A, Shuvalov N, Cheskidova E, Alekseev A, Artemov A, Putin E, Mamoshina P, Pryanichnikov N, Larocca J, Copeland K, Izumchenko E, Korzinkin M, Zhavoronkov A.
PMID: 29487692
Oncotarget. 2017 Dec 28;9(8):7796-7811. doi: 10.18632/oncotarget.23748. eCollection 2018 Jan 30.

Here we present the application of deep neural network (DNN) ensembles trained on transcriptomic data to identify the novel markers associated with the mammalian embryonic-fetal transition (EFT). Molecular markers of this process could provide important insights into regulatory mechanisms...

Spatial control of femtosecond laser system output with submicroradian accuracy.

Applied optics

Stalmashonak A, Zhavoronkov N, Hertel IV, Vetrov S, Schmid K.
PMID: 16523792
Appl Opt. 2006 Feb 20;45(6):1271-4. doi: 10.1364/ao.45.001271.

A system for the course control and spatial stabilization of the output beam of a femtosecond laser system is realized. An accuracy of 0.5 microrad is achieved long term in a laboratory environment for a beam with an initially...

Chirped-pulse stimulated Raman scattering in barium nitrate with subsequent recompression.

Optics letters

Zhavoronkov N, Noack F, Petrov V, Kalosha VP, Herrmann J.
PMID: 18033503
Opt Lett. 2001 Jan 01;26(1):47-9. doi: 10.1364/ol.26.000047.

We report a 30% internal conversion efficiency for the first Stokes pulse in stimulated Raman scattering of femtosecond pulses that are dispersively stretched to 250 ps, obtained by use of an all-solid-state laser system. A transfer of the linear...

γH2AX, 53BP1 and Rad51 protein foci changes in mesenchymal stem cells during prolonged X-ray irradiation.

Oncotarget

Tsvetkova A, Ozerov IV, Pustovalova M, Grekhova A, Eremin P, Vorobyeva N, Eremin I, Pulin A, Zorin V, Kopnin P, Leonov S, Zhavoronkov A, Klokov D, Osipov AN.
PMID: 28969073
Oncotarget. 2017 Jul 12;8(38):64317-64329. doi: 10.18632/oncotarget.19203. eCollection 2017 Sep 08.

At high exposure levels ionizing radiation is a carcinogen. Little is known about how human stem cells, which are known to contribute to tumorigenesis, respond to prolonged radiation exposures. We studied formation of DNA double strand breaks, accessed as...

Experimental Study of the Efficacy of Sodium Deoxyribonucleate Used in Combination with Co-Transplantation of Mesenchymal and Hematopoietic Stem Cells after Exposure to γ-Radiation.

Bulletin of experimental biology and medicine

Pavlova LN, Zhavoronkov LP, Pavlov VV, Panfilova VV, Izmest'eva OS, Chibisova OF, Ivanov VL, Shegai PV, Kaprin AD.
PMID: 34855080
Bull Exp Biol Med. 2021 Dec;172(2):236-244. doi: 10.1007/s10517-021-05369-z. Epub 2021 Dec 02.

We studied the possibility of using sodium deoxyribonucleate (Derinat) for improving the efficiency of co-transplantation of mesenchymal (MSC) and hematopoietic stem cells (HSC) to female F1(CBA×C57BL/6) mice with bone marrow aplasia caused by exposure to γ-radiation. It was found...

Experimental evidence for supercontinuum generation by fission of higher-order solitons in photonic fibers.

Physical review letters

Herrmann J, Griebner U, Zhavoronkov N, Husakou A, Nickel D, Knight JC, Wadsworth WJ, Russell PS, Korn G.
PMID: 12005754
Phys Rev Lett. 2002 Apr 29;88(17):173901. doi: 10.1103/PhysRevLett.88.173901. Epub 2002 Apr 11.

We report on an experimental study of supercontinuum generation in photonic crystal fibers with low-intensity femtosecond pulses, which provides evidence for a novel spectral broadening mechanism. The observed results agree with our theoretical calculations carried out without making the...

Few-femtosecond passage of conical intersections in the benzene cation.

Nature communications

Galbraith MCE, Scheit S, Golubev NV, Reitsma G, Zhavoronkov N, Despré V, Lépine F, Kuleff AI, Vrakking MJJ, Kornilov O, Köppel H, Mikosch J.
PMID: 29044120
Nat Commun. 2017 Oct 18;8(1):1018. doi: 10.1038/s41467-017-01133-y.

Observing the crucial first few femtoseconds of photochemical reactions requires tools typically not available in the femtochemistry toolkit. Such dynamics are now within reach with the instruments provided by attosecond science. Here, we apply experimental and theoretical methods to...

Vive la radiorésistance!: converging research in radiobiology and biogerontology to enhance human radioresistance for deep space exploration and colonization.

Oncotarget

Cortese F, Klokov D, Osipov A, Stefaniak J, Moskalev A, Schastnaya J, Cantor C, Aliper A, Mamoshina P, Ushakov I, Sapetsky A, Vanhaelen Q, Alchinova I, Karganov M, Kovalchuk O, Wilkins R, Shtemberg A, Moreels M, Baatout S, Izumchenko E, de Magalhães JP, Artemov AV, Costes SV, Beheshti A, Mao XW, Pecaut MJ, Kaminskiy D, Ozerov IV, Scheibye-Knudsen M, Zhavoronkov A.
PMID: 29581875
Oncotarget. 2018 Feb 12;9(18):14692-14722. doi: 10.18632/oncotarget.24461. eCollection 2018 Mar 06.

While many efforts have been made to pave the way toward human space colonization, little consideration has been given to the methods of protecting spacefarers against harsh cosmic and local radioactive environments and the high costs associated with protection...

Showing 1 to 12 of 70 entries