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Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

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Light(Science & Applications) 2020年第1期9卷 1480-1487页

作者： Vasily Kravtsov ekaterina khestanova Fedor A.Benimetskiy Tatiana Ivanova Anton K.Samusev Ivan S.Sinev Dmitry Pidgayko Alexey M.Mozharov Ivan S.Mukhin Maksim S.Lozhkin Yuri V.Kapitonov Andrey S.Brichkin Vladimir D.Kulakovskii Ivan A.Shelykh Alexander I.Tartakovskii Paul M.Walker Maurice S.Skolnick Dmitry N.Krizhanovskii Ivan V.Iorsh ITMO University Saint Petersburg 197101Russia St.Petersburg Academic University Saint Petersburg 194021Russia Saint Petersburg State University ul.Ulyanovskaya 1Saint Petersburg 198504Russia Institute of Solid State Physics RASChernogolovka 142432Russia Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Department of Physics and Astronomy University of SheffieldSheffield S37RHUK

Optical bound states in the continuum(BICs)provide a way to engineer very narrow resonances in photonic *** extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical ***,the achievable interaction strength is limited by the purely photonic character of optical ***,we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor MoSe_(2) to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV,exhibiting large interaction-induced spectral *** asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector,in combination with effective reduction of the excitonic disorder through motional narrowing,results in small polariton linewidths below 3 *** with a strongly wavevector-dependent Q-factor,this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects,paving the way toward tuneable BIC-based polaritonic devices for sensing,lasing,and nonlinear optics.

关键词： polar nonlinear continuum

Processing stages of Gd_2Sr(Al_(1-x)Fe_x)_2O_7 series

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Rare Metals 2014年第1期33卷 47-53页

作者： ekaterina Tugova Victor Gusarov Laboratory of New Inorganic Materials Ioffe Physical Technical Institute of RAS Department of Physical Chemistry St. Petersburg State Institute of Technology Technical University

The continuous series of perovskite-related oxides with the general formula GdzSr（Al1-xFex）207 0 〈 x 〈 1 were prepared by conventional ceramic technology in air. The pro- cessing stages of Gd2Sr（Al1-xFex）207 0 〈 x 〈 1 phases were investigated by means of X-ray powder diffraction （XRD） and scanning electron microscopy （SEM） with the element phase analysis. The three main stages of GdeSr（All_~Fex）aO7 for- marion are pointed out. The analysis of the mutual influence of intermediate compounds on the synthesis of the target solid solutions of complex composition, in particular for Gd2Sr（All-xFex）207 was carried out. It is determined that the closeness of the reactive mixture composition to the composition of individual compounds Gd2SrA1207 or GdaSrFeaO7 is of importance for the realization of a partic- ular way of GdESr（Al1-xFex）207 solid solutions formation. It is shown that at x ,= 0.2 the reversing in scheme of Gd2Sr（Al1-Fex）207 series formation is observed. The formation of the Gd2Sr（Al1-xFex）207 continuous series is indicated by the monotonic dependence of molar unit cell volume on the iron content x.

关键词： Rare-earth metals Oxide materials Solid-state reactions Ceramics X-ray diffraction (XRD) Scanning electron microscopy (SEM)

Glycine-nitrate combustion engineering of neodymium cobaltite nanocrystals

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Rare Metals 2021年第7期40卷 1778-1784页

作者： ekaterina Alekseevna Tugova Oleg Nikolaevich Karpov New Inorganic Materials Laboratory Ioffe InstituteSaint-Petersburg 194021.Russia Department of Physical Chemistry Saint Petersburg Electrotechnical University“LETT”Saint-Petersburg 197376Russia

NdCoO_(3)nanocrystals formed via glycine-nitrate combustion method followed by heat treatment has been systematically *** of NdCoO_(3)nanocrystals with minimal size of 7-10 nm from X-ray amorphous combustion products has been elucidated to be a very rapid process,occurring at the temperature of 550-600℃for5-30 *** comparison of the minimum sizes of NdCoO_(3)crystallites obtained from the offered empirical relation dmin=lunit cell·N(where N is 7-12 and‘unit cellis elementary cell parameter)and the data determined on the basis of X-ray diffraction(XRD)and transmission electron microscopy(TEM)showed good *** existence of special nanoporous microstructure and spatial limitations prevent NdCoO_(3)particle *** kinetic equation based on Avrami-Erofeev nucleation model was offered to be correlated well with experimental data of fractional conversion(a)versus isothermal time(s).The apparent activation energy(Ea=(338±32)kJ)of formation of NdCoO_(3)nanocrystals from X-ray amorphous combustion products obtained in excess of oxidant followed by heat treatment at 550-600℃was determined.

关键词： Rare earths Perovskite Kinetics Mechanism Combustion synthesis Nucleation

Sell^(hi) neutrophils: a key to triumph in cancer therapy

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Signal Transduction and Targeted Therapy 2023年第12期8卷 5568-5569页

作者： ekaterina Pylaeva Jadwiga Jablonska Department of Otorhinolaryngology University Hospital EssenUniversity Duisburg-EssenEssen 45147Germany German Cancer Consortium(DKTK)partner site Düsseldorf/Essen Essen 45147Germany

In a recent study published in Cell,Gungabeesoon and colleagues demonstrated that a specific subpopulation of neutrophils,characterized by a distinct Sell^(hi)(CD62L^(hi))phenotype with an interferon gene signature,acutely accumulates in tumors during successful immunotherapy and is associated with better treatment *** findings enhance our understanding of the neutrophil heterogeneity within the tumor context and highlight their potential in cancer immunotherapy.

关键词： cancer interferon neutrophils

Molecular testing for colorectal cancer:Clinical applications

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World Journal of Gastrointestinal Oncology 2021年第10期13卷 1288-1301页

作者： Evgeny Imyanitov ekaterina Kuligina Department of Tumor Biology N.N.Petrov Institute of OncologySt.-Petersburg 197758Russia Department of Medical Genetics St.-Petersburg Pediatric Medical UniversitySaint-Petersburg 194100Russia Department of Oncology I.I.Mechnikov North-Western Medical UniversitySaint-Petersburg 191015Russia

Molecular genetic analysis is an integral part of colorectal cancer(CRC)*** choice of systemic therapy for CRC is largely based on the results of tumor molecular *** of the KRAS and NRAS gene status is mandatory for consideration of anti-epidermal growth factor receptor(EGFR)*** with the BRAF V600E substitution are characterized by aggressive behaviour,may require intensified cytotoxic regimens and benefit from combined BRAF and EGFR *** inactivation of DNA mismatch repair(MMR),or MUTYH gene,or DNA polymerase epsilon results in excessive tumor mutational burden;these CRCs are highly antigenic and therefore sensitive to immune checkpoint *** CRCs are characterized by overexpression of the HER2 oncogene and respond to the appropriate targeted *** are CRCs with clinical signs of hereditary predisposition to this disease,which require germline genetic *** biopsy is an emerging technology that has the potential to assist CRC screening,control the efficacy of surgical intervention and guide disease *** landscape of CRC molecular diagnosis is currently undergoing profound changes due to the increasing use of next generation sequencing.

关键词： Colorectal cancer Anti-epidermal growth factor receptor therapy KRAS NRAS BRAF HER2 Microsatellite instability MUTYH Hereditary cancer

Jasmonic Acid Oxidase 2 Hydroxylates Jasmonic Acid and Represses Basal Defense and Resistance Responses against Botrytis cinerea Infection

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Molecular Plant 2017年第9期10卷 1159-1173页

作者： ekaterina Smirnova Laboratoire de Chimie Organique Synthétique Institut de Chimie Université de Strasbourg CNRS Strasbourg France [∗]Corresponding authorThese authors contributed equally to this article.

Jasmonates （JAs） orchestrate immune responses upon wound/herbivore injury or infection by necrotro- phic pathogens. Elucidation of catabolic routes has revealed new complexity in jasmonate metabolism. Two integrated pathways attenuate signaling by turning over the active hormone jasmonoyl-isoleucine （JA-Ile） through w-oxidation or deconjugation, and define an indirect route forming the derivative 12OH-JA. Here, we provide evidence for a second 12OH-JA formation pathway by direct jasmonic acid （JA） oxidation. Three jasmonic acid oxidases （JAOs） of the 2-oxoglutarate dioxygenase family catalyze spe- cific oxidation of JA to 12OH-JA, and their genes are induced by wounding or infection by the fungus Botrytis cinerea. JA02 exhibits the highest basal expression, and its deficiency in jao2 mutants strongly enhanced antifungal resistance. The resistance phenotype resulted from constitutive expression of antimi- crobial markers rather than from their higher induction in infected jao2 plants and could be reversed by ectopic expression of any of the three JAOs injao2. Elevated defense injao2 was dependent on the activity of JASMONATE RESPONSE 1 （JAR1） and CORONATINE-INSENSITIVE 1 （COI1） but was not correlated with erihanced JA-Ile accumulation. Instead, jao2 mutant lines displayed altered accumulation of several JA species in healthy and challenged plants, suggesting elevated metabolic flux through JA-Ile. Collectively, these data identify the missing enzymes hydroxylating JA and uncover an important metabolic diversion mechanism for repressing basal JA defense responses.

关键词： 2-oxoglutarate oxygenase jasmonic acid defense regulation hormone metabolism Botrytis

Removal of perfluorinated surfactants from wastewater by adsorption and ion exchange--Influence of material properties,sorption mechanism and modeling

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Journal of Environmental Sciences 2017年第4期29卷 160-170页

作者： Falk Schuricht ekaterina S.Borovinskaya Wladimir Reschetilowski Institute of Industrial Chemistry Dresden University of Technology

Perfluorooctane sulfonate（PFOS） has attracted increasing concern in recent years due to its world-wide distribution, persistence, bioaccumulation and potential toxicity. The influence of sorbent properties on the adsorptive elimination of PFOS from wastewater by activated carbons, polymer adsorbents and anion exchange resins was investigated with regard to their isotherms and kinetics. The batch and column tests were combined with physicochemical characterization methods, e.g., N2 physisorption, mercury porosimetry, infrared spectroscopy, differential scanning calorimetry, titrations, as well as modeling. Sorption kinetics was successfully modelled applying the linear driving force（LDF） approach for surface diffusion after introducing a load dependency of the mass transfer coefficient β*** big difference in the initial mass transfer coefficient βs,0, when non-functionalized adsorbents and ion-exchange resins are compared, suggests that the presence of functional groups impedes the intraparticle mass transport. The more functional groups a resin possesses and the longer the alkyl moieties are the bigger is the decrease in sorption *** the selectivity for PFOS sorption is increasing when the character of the functional groups becomes more hydrophobic. Accordingly, ion exchange and hydrophobic interaction were found to be involved in the sorption processes on resins, while PFOS is only physisorptively bound to activated carbons and polymer adsorbents. In agreement with the different adsorption mechanisms, resins possess higher total sorption capacities than adsorbents. Hence, the latter ones are rendered more effective in PFOS elimination at concentrations in the low μg/L range, due to a less pronounced convex curvature of the sorption isotherm in this concentration range.

关键词： PFOS Activated carbon Anion exchange resin Sorption kinetics modeling Sorption isotherm Selectivity of sorption

The prognostic role of high-sensitivity C-reactive protein in patients with acute myocardial infarction

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Journal of Geriatric Cardiology 2020年第7期17卷 379-383页

作者： ekaterina A Polyakova Evgeny N Mikhaylov Department of Faculty Therapy Pavlov First Saint-Petersburg State Medical UniversitySaint-PetersburgRussian Federation Metabolic Syndrome Laboratory Institute of EndocrinologyAlmazov National Medical Research CentreSaint-PetersburgRussian Federation Neuromodulation Lab and Arrhythmia Department Almazov National Medical Research CentreSaint PetersburgRussian Federation Department of Bioengineering Systems Saint-Petersburg Electrotechnical University“LETI”Saint PetersburgRussian Federation

1 Introduction Inflammation is one of the main mechanisms in the pathogenesis of atherosclerosis,and the interest to the evaluation of inflammatory biomarkers in coronary artery disease(CAD)has been increasing over the last decade.[1,2]Destabilization of chronic artery plaques,which leads to acute coronary syndromes,has been associated with inflammatory status.[1,3]。

关键词： Atrial fibrillation Coronary artery disease High sensitive C-reactive protein Myocardial infarction Prognosis

Morphology of crater and caldera lakes in the Far Eastern region of Russia and the features of their development

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Journal of Mountain Science 2024年第4期21卷 1246-1258页

作者： Dmitrii N.KOZLOV ekaterina V.LEBEDEVA Institute of Marine Geology and Geophysics Far Eastern Branch of the Russian Academy of SciencesYuzhno-Sakhalinsk 693022Russia Institute of Geography Russian Academy of SciencesMoscow 119017Russia

Volcanic lakes in the Kuril-Kamchatka region are difficult to access,and for this reason,they remain poorly studied,with only scattered and brief data *** authors have conducted a study of 10 lake basins using modern digital echolocation survey techniques and have also compiled and summarized published data for 15 lakes in the region,calculating their main morphometric *** has been established that many caldera lake basins are modified by young explosive funnels,extrusive or effusive domes,and exhibit traces of hydrothermal *** lakes of the same genetic type in the Kuril-Kamchatka region are similar in depth and depression forms,the group of caldera lakes shows less homogeneity across all morphometric *** was found that the absolute heights of the reservoirs on Kamchatka Peninsula are generally greater than those on the Kuril Islands,as is often the case with the size of their *** volcanic lakes under study can rapidly change their volume and shape under the influence of endogenous *** the first time for this region,on the base of repeated observations,underwater extrusive dome rate growth and the approximate rates of 2 lake level changes were *** observations of lakes in the Ksudach calderas(Kamchatka)and on Simushir Island indicate approximate rates of level changes:a decrease ranging within 0.5-0.6 m per year(over a 27-year observation interval)and an increase reaching up to 0.26 m per year(over a 48-year interval).The growth rate of the underwater extrusive dome in Lake Shtyubel has averaged 1-1.6 m per year over the past 25 *** analysis has facilitated the first generalization regarding the morphology and developmental features of crater and caldera lakes in the Kuril-Kamchatka region of Russia,representing an important step in their *** results obtained will provide a solid foundation for subsequent research in this region and may be of interest to researchers studying

关键词： Volcanic lakes Echolocation survey Volcanism Gashydrotherms Kamchatka Kuril Islands