ОГ

О. Г. Шевченко

University of Delaware

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Co-Authors

Yu. N. Chiang

National Academy of Sciences of Ukraine

T. Yu. Orlova

A.V. Zhirmunsky National Scientific Center of Marine Biology Far Eastern Branch of the Russian Academy of Sciences

Steven H. Strauss

Oregon State University

Cathleen Ma

Oregon State University

M. A. Shulgina

A.V. Zhirmunsky National Scientific Center of Marine Biology Far Eastern Branch of the Russian Academy of Sciences

Julia A. Maresca

University of Delaware

КО

К. О. Тевс

Far Eastern Federal University

V. M. Shulkin

Geographical Institute

ИВ

И. В. Стоник

A.V. Zhirmunsky National Scientific Center of Marine Biology Far Eastern Branch of the Russian Academy of Sciences

Amy M. Brunner

Virginia Tech

Cooperative Institutions

Oregon State University

Russian Academy of Sciences

University of Delaware

Far Eastern Branch of the Russian Academy of Sciences

A.V. Zhirmunsky National Scientific Center of Marine Biology Far Eastern Branch of the Russian Academy of Sciences

National Academy of Sciences of Ukraine

Biotechnology Institute

Washington State University

Pacific Northwest Research Station

Ural Branch of the Russian Academy of Sciences

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Electric Resistance of Thin Single-crystal Aluminum Plates

Journal of Experimental and Theoretical Physics (1968)

Yu. N. Chiang V. V. Eremenko О. Г. Шевченко

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Genome sequences of four bacterial strains isolated from organofluorine enrichment cultures

Microbiology Resource Announcements (2024)

Jennifer L. Goff Christopher N Hahn Rebecca A. Ingrassia Chanistha Tiyapun Gray G. Waldschmidt

Because fluorinated organic compounds are broadly used and highly persistent, microbes isolated from wastewater may be able to degrade these contaminants. Here, we report the genome sequences of

Enrichment culture

10.1128/mra.00532-24

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Citations (1)

Features of the dissipative electron transport near the boundary in the system Al(N)-In(S)

Journal of Experimental and Theoretical Physics (2000)

Yu. N. Chiang S. N. Gritsenko О. Г. Шевченко

Solid-state physics

10.1134/1.1342891

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Citations (4)

Manifestation of coherent and spin-dependent effects in the conductance of ferromagnets adjoining a superconductor

Low Temperature Physics (2007)

Yu. N. Chiang О. Г. Шевченко R. N. Kolenov

Electrotransport was investigated in the macroscopic ferromagnets (F) Fe and Ni in the presence of F∕In interfaces with different area. The measurements were performed in two configurations—with a constant current flowing parallel and perpendicular to the interfaces. It was found that the transition of In into the superconducting (S) state is accompanied by an increase of the resistance of the ferromagnets. In the first configuration the increase concerned the change of the resistance of the region between the boundaries of the potential probes (superconducting “mirrors”) and was of the order of the typical, weakly localized, contribution to the conductivity of ferromagnets from subgap singlet excitations, arising with Andreev reflection, for macroscopic distances between the “mirrors” at the coherence length characteristic for metals with a strong difference of the energy dispersion of the spin subbands. In the second configuration, where the conductivity of the F/S interface is also included in the measurements, the nonequilibrium resistive contribution of the latter, associated with the spin polarization of the region of the ferromagnet under the interface, was studied. The observed increase of the resistance corresponded to the theoretically predicted magnitude of the change occurring in the resistance of a single-domain region with spin-polarized electrons as a result of spin accumulation on the F/S interface under the conditions of limitations of Andreev reflections. The coefficients of current polarization and the coherence length in the exchange field were found for Fe and Ni from the experiemental data and the lower limit of the spin relaxation length was found for the samples investigated.

Andreev reflection

10.1063/1.2720077

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Citations (16)

Direct measurements of the Bernoulli effect in superconductors

Low Temperature Physics (1996)

Yu. N. Chiang О. Г. Шевченко

A method of measurement of the Bernoulli potential in superconductors with electron velocity close to critical is proposed. The maximum value of the Bernoulli potential is measured in a type I superconductor (tantalum). The obtained value indicates that the electron mass in a Cooper pair corresponds to the mass of a free electron.

Bernoulli process

10.1063/10.0034037

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Citations (5)

Intraspecific heterogeneity, multiple allelism and morphological divergence between morphotypes of Thalassiosira allenii (Bacillariophyta) from the Sea of Japan

Phycologia (2023)

Kseniya V. Efimova M. A. Shulgina О. Г. Шевченко

Thalassiosira allenii is reported for the first time from marine phytoplankton of the Russian far East. Five strains representing three morphological variants of T. allenii, from three locations in the Sea of Japan, were investigated. The D8–D10 domain of LSU rDNA and rbcL of T. allenii were sequenced for the first time. Three morphological forms of T. allenii showed completely identical rbcL sequences and distinctly different nuclear rDNA sequences. The genetic differences between morphotypes were determined by the number of allelic variants of LSU rDNA, one of which was common to all studied strains. Two different types of the D1–D3 domain and three different types of the D8–D10 divergent domain were detected in the cultured strains of T. allenii. The three morphotypes are described in detail and compared. One allele of D1–D3 and one allele of D8–D10 were identified in the strains of T. allenii from two stations in Ussuri Bay. Two and three alleles of the D8–D10 domain were identified in the strains with an ambiguous morphotype and in T. allenii var. striata, respectively, from one station in Amur Bay. Subdivision of T. allenii into morphotypes based on morphology matched that based on molecular-genetic analyses using D8–D10 LSU rDNA. Caution is recommended in using LSU rDNA sequences and rbcL divergence as the principal criterion for delimiting and metabarcoding T. allenii varieties/morphotypes. The lack of genetic differentiation in rbcL, and the presence of clear intra-specific genetic differentiation among morphotypes in two regions of LSU rDNA suggest a link between morphological differences and the nuclear genome. The D8–D10 domain of LSU rDNA appears more suitable for discriminating morphotypes within T. allenii. The rbcL is an effective marker for recognizing T. allenii at species level, but not at infraspecific level.

Genetic divergence

10.1080/00318884.2023.2231783

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Transition Metal-Nonmetal in Conductivity of Ceramic Hole-Doped Cobaltites

Journal of Modern Physics (2010)

Yurii Nikolaevich Chiang M. O. Dzyuba О. Г. Шевченко A. A. Kozlovskiĭ Vitalii Philipovich Khirnyi

In bulk granulated cobaltite La1–xSrxCoO3 with the size of granules of order of 1 micron at strontium hole doping with replacement factor x = 0.35, a transition “metal-nonmetal” in the conductivity was revealed, presumably connected with AFM ordering of the moments of granules. The assumption is proved by the agreement between the experiment and results of calculation within the limits of a model offered for electron transport based on the account of in-granule double exchange Zener mechanism and intergranule mechanism of spin-polarized tunneling on the nearest neighbours with AFM exchange interaction. The calculation differs in that conductivities within granules are summarized, while total resistance of the system is represented as a sum of resistances of the granules. In addition, the existence of AFM interaction between granules is supported by the observed insensitivity of conductivity to a low external magnetic field (up to 5 kOe).

Cobaltite

Nonmetal

10.4236/jmp.2010.15045

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Citations (2)

Russian Journal of Marine Biology (2001)

И. В. Стоник T. Yu. Orlova О. Г. Шевченко

10.1023/a:1013701403968

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Citations (25)

Russian Journal of Marine Biology (2003)

T. Yu. Orlova М. С. Селина О. Г. Шевченко