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Reversible hydrogenation restores defected graphene to graphene

Science China Chemistry 2021年第6期64卷 1047-1056页

作者： Lin Jiang Pauline mGvan Deursen Hadi Arjmandi-Tash Liubov ABelyaeva Haoyuan Qi Jiao He Vincent Kofman Longfei Wu valery muravev Ute Kaiser Harold Linnartz Emiel JmHensen Jan PHofmann Grégory FSchneider Leiden Institute of Chemistry Leiden UniversityEinsteinweg 552333CC LeidenThe Netherlands Central Facility for Electron microscopy Electron Microscopy Group of Materials ScienceUlm UniversityAlbert-Einstein-Allee 11Ulm 89081Germany Laboratory for Astrophysics Leiden ObservatoryLeiden UniversityNiels Bohrweg 22333 CA LeidenThe Netherlands Laboratory for Inorganic materials and Catalysis Department of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O.Box 5135600 MB EindhovenThe Netherlands Center for Advancing Electronics Dresden(cfaed)and Faculty of Chemistry and Food Chemistry Technical University of Dresden010069 DresdenGermany

Graphene as a two-dimensional material is prone to hydrocarbon contaminations,which can significantly alter its intrinsic electrical ***,we implement a facile hydrogenation-dehydrogenation strategy to remove hydrocarbon contaminations and preserve the excellent transport properties of monolayer *** electron microscopy we quantitatively characterized the improved cleanness of hydrogenated graphene compared to untreated *** situ spectroscopic investigations revealed that the hydrogenation treatment promoted the adsorption of water at the graphene surface,resulting in a protective layer against the re-deposition of hydrocarbon ***,the further dehydrogenation of hydrogenated graphene rendered a more pristine-like basal plane with improved carrier mobility compared to untreated pristine *** findings provide a practical post-growth cleaning protocol for graphene with maintained surface cleanness and lattice integrity to systematically carry a range of surface chemistry in the form of a well-performing and reproducible transistor.

关键词： graphene reversible hydrogenation surface cleanness in situ spectroscopy transistors

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Diversity of the rodent communities in the Turan Desert region

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Integrative Zoology 2006年第4期1卷 153-161页

作者： valery m.NERONOV Ludmila A.KHLYAP Andrey A.WARSHAVSKY n.severtsov institute of ecology and evolution russian academy of sciencesmoscowrussia

We assessed the diversity of rodent communities in the deserts of Russia,Kazakhstan,and Central Asia using geographic information system *** are 66 species of rodents,belonging to eight faunistic complexes,inhabiting this *** discuss the geographical changes occurring in taxonomic and zoogeographic diversity at both species and community *** of gerbils and jerboas dominate in the Turan Desert region(66%of the area).Steppe communities of susliks penetrate the deserts from the *** in deserts causes the replacement of native rodent communities with mouse communities or completely eradicates rodents in their main habitats.

关键词： biodiversity geographic information systems maps rodents zoogeography

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PHOTOTHERAPY OF GINGIVITIS:PILOT CLINICAL STUDY

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Journal of Innovative Optical Health Sciences 2011年第4期4卷 437-446页

作者： ELINA A.GENINA VLADImIR A.TITORENKO valery V.TUCHIN GEORGY V.SImONENKO ALEXEY N.BASHKATOV GENNADY m.SHUB ALEXANDER V.LEPILIN ILYA V.YAROSLAVSKY GREGORY B.ALTSHULER Saratov State University Saratov410012Russia Saratov State medical University Saratov410012Russia Institute of Precise mechanics and Control of RAS Saratov 410028Russia Palomar medical Technology Inc.Burlington MA 01803USA

The goal of this work was to evaluate the safety and efficacy of the Red Light Emitted Toothbrush(R-LETB)emitting at wavelength of 663 nm with power density of 3.3mW/cm2 in combination with 0.1%-methylene blue(mB)solution for the reduction of plaque and treatment of gingivitis.A microbiological in vitro study and a pilot clinical study were *** microbiological study has shown total suppression of pathogenicflora after a 3-min exposure to the dye solution followed by a 20-sec treatment with the *** the clinical study,37 subjects of both sexes with gingivitis were enrolled and randomly assigned to one of two *** in thefirst(treatment)group were instructed to rinse their mouth with mB solution provided for 1 min and then brush the teeth with the R-LETB and standardized *** second(control)group used only the toothpaste and a regular *** in both groups followed their respective procedures 2 times a day(morning and evening)for 30 *** of plaque,gingival bleeding,and inflammation were evaluated at 14-day and 30-day *** the both groups,all indices improved in comparison with ***,the treatment group demonstrated more pronounced improvement of the studied indices that was attributed to additional anti-microbial action of red light and mB on gum ***,the use of R-LETB with mB appears to have a multifactor therapeutic action on oral pathological microflora:mechanical removal of the bacteria and suppressing action on microorganisms due to photodynamic reaction.

关键词： Tooth brushing methylene blue photodynamic therapy pathogenic bacteria

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A special issue on Biophotonics in Europe

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Frontiers of Optoelectronics 2017年第3期10卷 203-210页

作者： valery V. TUCHIN Ekaterina BORISOVA malgorzata JEDRZEJEWSKA-SZCZERSKA martin J. LEAHY Francesco S. PAVONE Jurgen POPP Jose POZO Research-Educational Institute of Optics and Biophotonics Samtov State University (National Research University of Russia) 410012 Saratov Russia Interdisciplinary Laboratory of Biophotonics Tomsk State University (National Research University of Russia) 634050 Tomsk Russia Laboratory of-Laser Diagnostics of Technical and Living Systems Instituteof Precision Mechanics and Control of RAS 410028 Saratov Russia 4 Institute of Electronics Bulgarian Academy of Sciences Sofia Bulgaria Institute of Electronics Bulgarian Academy of Sciences Sofia Bulgaria Faculty of Electronics Telecommunicationand Informatics Gdafisk University of Technology Poland National Biophotonics and Imaging Platform Ireland Chair of Applied Physics School of Physics National University of Ireland Galway Ireland European Laboratory for Non Linear Spectroscopy (LENS) and University of Florence Sesto Fiorentino Italy Leibniz Institute of Photonic Tectmology Jena Institute of Physical chemistry & AbbeCenter of Photonics Friedrich Schiller University Jena Germany Technology and Innovation EPIC - European Photonics Industry Consortium Netherlands

Biophotonics is an emerging multidisciplinary research area, embracing all light-based technologies applied to the life sciences and medicine [1-6]. The expression itself is the combination of the Greek syllables ＂bios＂ standing for life and ＂phos＂ standing for light. Photonics is the technical term for all methodologies and technologies utilizing photons over the whole spectrum from X-ray over the ultraviolet, visible and the infrared to the terahertz region, and its interaction with any matter. Beyond this definition, biophotonics is a scientific discipline of remarkable societal importance. As a part of photonics, it has proved to be an important enabling technology for accelerated progress in medicine and biotechnology. It can do so, because it originated at the interface of the most innovative academic disciplines of the last century, i.e., photonics, biotechnology and nanotechnologies. This field of research brings together scientists from different professions, such as physicists, biologists, pharmacists, medical doctors, etc. To work on common projects, they need to understand the ideas and the techniques of their counterparts.

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点击化学--释义与目标

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化学进展 2008年第1期20卷 1-4页

作者： m. G. Finn Hartmuth C. Kolb valery V. Fokin K. Barry Sharpless 张欣豪吴云东不详香港科技大学化学系香港九龙

点击化学i自2001年由Sharpless提出以来,引起广泛的重视,并得以蓬勃的发展。许多综述对此领域的进展进行了归纳ii,赵卫光,李正名等在《有机化学》中发表中文综述介绍了点击化学的一些基本概念和应用iii。作为点击化学的提出者,Sharples... 详细信息

点击化学i自2001年由Sharpless提出以来,引起广泛的重视,并得以蓬勃的发展。许多综述对此领域的进展进行了归纳ii,赵卫光,李正名等在《有机化学》中发表中文综述介绍了点击化学的一些基本概念和应用iii。作为点击化学的提出者,Sharpless最近写了一篇文章深入浅出地阐释了点击化学的思想与愿景。该文由北山隆翻译成日文,并于日本化学会的《化学と工業》发表iv。Sharpless希望此文也能以中文的形式与中国读者见面。受Sharpless之托,我们将此文翻译成中文,以冀与更多同行分享。

关键词：《有机化学》释义中文化学会综述翻译

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Changes in net ecosystem exchange of CO_(2)in Arctic and their relationships with climate change during 2002-2017

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Advances in Climate Change Research 2021年第4期12卷 475-481页

作者： LI Zhi-Long mU Cui-Cui CHEN Xu WANG Xing-Yu DONG Wen-Wen JIA Lin mU mei Irina STRELETSKAYA valery GREBENETS Sergey SOKRATOV Alexander KIZYAKOV WU Xiao-Dong Key Laboratory of Western China's Environmental Systems(ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou730000China Southern marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519000China Cryosphere Research Station on the Qinghai-Tibetan Plateau State Key Laboratory of Cryospheric ScienceNorthwest Institute of Eco-Environment and ResourceChinese Academy of SciencesLanzhou730000China University Cooperation of Polar Research Beijing100875China Geographical Faculty Lomonosov Moscow State UniversityMoscow119991Russia

Arctic wanning leads to permafrost degradation,which can increase ecosystem respiration and release more greenhouse gas into the ***,climate warming also promotes the plant growth and increases carbon ***,it is largely unknown about the carbon budget and their responses to climate change in the Arctic *** this study,to investigate the seasonal and annual net ecosystem carbon exchange(NEE),we collected 71 observation stations for net ecosystem exchange(NEE)of CO_(2)in the high latitude permafrost regions during *** results showed that the annual NEE was-8.2±4.1 g CO_(2)m^(-2)d^(-1)for forest,-3.3±2.6 g CO_(2)m^(-2)d^(-1)for shrub,-4.8±4.1 g CO_(2)m^(-2)d^(-1)for grassland,-3.6±3.0 g CO_(2)m^(-2)d^(-1)for wetland and 0.02±0.62 g CO_(2)m^(-2)d^(-1)for tundra,*** 2002 to 2017,the CO_(2)emissions of grassland(carbon source)showed a decreasing trend,and the CO_(2)assimilation of shrub and forest(carbon sink)has been *** wetland and tundra are shifting from carbon sources to *** were great variations in temperature sen-sitivities(Q10)of NEE in different seasons,with larger values in winter and lower values in *** findings indicate that the Arctic terrestrial ecosystem presently acts as a carbon sink,while there is a possibility that future warming,especially the warming in winter,may decrease the carbon sink of the Arctic terrestrial ecosystem.

关键词： Arctic Climate change Permafrost Carbon flux Ecosystem Eddy covariance

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medication beliefs predict medication adherence in ambulatory patients with decompensated cirrhosis

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World Journal of Gastroenterology 2017年第40期23卷 7321-7331页

作者： Kelly L Hayward Patricia C valery Jennifer H martin Antara Karmakar Preya J Patel Leigh U Horsfall Caroline J Tallis Katherine A Stuart Penny L Wright David D Smith Katharine m Irvine Elizabeth E Powell W Neil Cottrell Pharmacy Department Princess Al-exandra Hospital The Centre for Liver Disease Research Translational Research Institute The University of Queensland Cancer and Chronic Disease Research Group QIMR Berghofer Medical Research Institute School of medicine and Public Health The University of Newcastle The Centre for Liver Disease Research Translational Research Institute The University of Queensland Department of Gastroenterology and Hepatology Princess Alexandra Hospital The Centre for Liver Disease Research Translational Research Institute The University of Queensland Department of Gastroenterology and Hepatology Princess Alexandra Hospital Statistics Unit QIMR Berghofer Medical Research Institute School of Pharmacy The University of Queensland

AIm To investigate the impact of medication beliefs, illness perceptions and quality of life on medication adherence in people with decompensated *** One hundred adults with decompensated cirrhosis completed a structured questionnaire when they attended for routine outpatient hepatology review. measures of self-reported medication adherence(morisky medication Adherence Scale), beliefs surrounding medications(Beliefs about medicines Questionnaire), perceptions of illness and medicines(Brief Illness Perception Questionnaire), and quality of life(Chronic Liver Disease Questionnaire) were examined. Clinical data were obtained via patient history and review of medical records. Least absolute shrinkage and selection operator and stepwise backwards regression techniques were used to construct the multivariable logistic regression model. Statistical significance was set at alpha = *** medication adherence was " High " in 42 % o f participants, "medium" in 37%, and "Low" in 21%. Compared to patients with "High" adherence, those with "medium" or "Low" adherence were more likely to report difficulty affording their medications(P ment helpfulness(P = 0.003) and stronger medication concerns relative to medication necessity beliefs(P = 0.003). People with "Low" adherence also experienced greater symptom burden and poorer quality of life, including more frequent abdominal pain(P = 0.023), shortness of breath(P = 0.030), and emotional disturbances(P = 0.050). multivariable analysis identified having stronger medication concerns relative to necessity beliefs(Necessity-Concerns Differential ≤ 5, OR = 3.66, 95%CI: 1.18-11.40) and more frequent shortness of breath(shortness of breath score ≤ 3, OR = 3.87,95%CI: 1.22-12.25) as independent predictors of "Low"*** The association between "Low" adherence and patients having strong concerns or doubting the necessity or helpfulness of their medications should be explor

关键词： medication adherence medication beliefs Illness perceptions Quality of life Liver cirrhosis

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An Aminopyrrolidinyl Phosphonates—A New Class of Antibiotics: Facile Synthesis and Predicted Biological Activity

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International Journal of Organic Chemistry 2020年第4期10卷 170-181页

作者： Abed Al Aziz Al Quntar Hasan Dweik Ahmad Jabareen Tatyana A. Gloriozova valery m. Dembitsky Department of material Engineering Faculty of Engineering Al-Quds University Jerusalem Palestine Faculty of Chemistry and Chemical Technology Al-Quds University Jerusalem Palestine Institute of Biomedical Chemistry Moscow Russia Centre for Applied Research and Innovation and Entrepreneurship Lethbridge College Lethbridge Canada

A novel class of aminopyrrolidinyl phosphonates was synthesized in 74% - 80% isolated yield by the addition of three-fold excess of primary amines to diethyl 4-chloro-1-butynylphosphonates. The reaction was carried out at room temperature and in the absence of solvent or catalyst to give solely compounds which showed predicted biological activity based on PASS program. Some of the synthesized derivatives of antibiotics exhibit properties for the treatment of stroke, the treatment of acute neurological disorders, and can also be acetyl esterase inhibitors.

关键词： Alkynylphosphonates Cyclization Pyrrolidine β-Aminophosphonates Amine Addition Antibiotics

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Low-Temperature Peculiarities of Electron Transport Properties of Carbon Nanotubes

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材料科学与工程（中英文A版） 2011年第2X期1卷 161-167页

作者： valery Egorushkin Natalia melnikova Alexander Ponomarev Nadezhda Bobenko Institute of Strength Physics and materials Science Siberian Branch of Russian Academy of Sciences Tomsk 634021 Russia

The large dispersion of data on electrical resistivity (from 10-4 ?·m to 20 ?·m) and low-temperature peculiarities of electrical resistivity (decreasing when temperature increases) in different carbon nanotubes (CNTs) are shown to be described by the classical Drude low with the electron relaxation time calculated by the quantum mechanical techniques, taking into account multiple elastic scattering of electrons by impurities and structural irregularities which are formed in nanotubes during their synthesis. In the frame of our approach it is also possible to describe the wide spread of magnitudes of thermal conductivity, its temperature dependence and to understand why thermopower of these systems does not have any dispersion in magnitude for different CNTs. For resistance and thermal conductivity the magnitude of carrier concentration is determinant but for thermopower it is not important.

关键词：电子输运性质碳纳米管低温度温度依赖性载流子浓度电阻率温度升高计算时间

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Phase-matched third-harmonic generation via doubly resonant optical surface modes in 1D photonic crystals

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Light(Science & Applications) 2016年第1期5卷 424-429页

作者： valery N Konopsky Elena V Alieva Sergey Yu Alyatkin Alexey A melnikov Sergey V Chekalin Vladimir m Agranovich Institute of Spectroscopy Fizicheskaya5TroitskMoscow 142190Russia moscow Institute of Physics and Technology Institutskiy per.9Dolgoprudny 141700Russia

Efficient nonlinear conversion requires that interacting optical waves maintain a consistent phase relationship when traveling in a medium despite its *** phase-matching,which is often used to compensate for the dispersion,is not applicable to optically isotropic nonlinear ***,we present a one-dimensional photonic crystal structure that allows the propagation of optical surface waves,both at the fundamental and third-harmonic frequencies,as an efficient medium for phasematched third-harmonic generation.A unique advantage of this structure is that the effective refractive indices for the surface waves are similar to the refractive index of air at both *** allows phase-matching between the first and third harmonics,and a visible collinear beam of the third harmonic is produced at the prism-coupled ***,these optical surface waves propagate over long distances even if a lossy nonlinear nanofilm is deposited onto the photonic crystal *** provide experimental results for third-harmonic generation at a wavelength of 410 nm for a bare dielectric Ta2O5/SiO2 multilayer structure and for the same structure coated with a 15-nm GaAs film.

关键词： nonlinear optics optical surface waves photonic crystals

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