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Influence of Different Forest Management Techniques on the Quality of Wood

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Journal of Renewable Materials 2021年第12期9卷 2175-2188页

作者： Olga Grigoreva Elena Runova Alexei Alyabyev Edward Hertz Anna Voronova viktor Ivanov Svetlana Shadrina Igor Grigorev Department of Forestry Saint Petersburg State Forest Engineering University named after S.M.KirovSaint-Petersburg194021Russian Department of Forest Crops Breeding and DendrologyBratsk State UniversityBratsk665709Russian Department of Transport and Technological Means and Equipment Forestry Complex Mytischi Branch of Bauman Moscow State Technical UniversityMytischi115533Russian Department of Technologies and Equipment of Timber Industry Ural State Forest Engineering UniversityYekaterinburg620100Russian Department of Applied Mathematics and Cybernetics Petrozavodsk State UniversityPetrozavodsk185910Russian Department of Technology and Equipment for Forestry Production Mytischi Branch of Bauman Moscow State Technical UniversityMytischi141005Russian Department of Technology and Equipment of Forest Complex Arctic State Agrotechnological UniversityYakutsk677007Russian

The issue of accelerated forestry plantation with high-quality wood using the best soils in terms of productivity,fertilizers,and intensive treatment has become quite relevant due to increased demand for forestry products and higher requirements for environmentally friendly use of forest *** paper presents the results of a study on the impact of various techniques for treating coniferous plantations,including thinning,fertilization,and herbicide processing,on wood quality key *** paper examined the wood density,correlation of early and late wood zones,and the cell wall thickness for 38-year-old pine trees grown on the sample plots of Siversky leskhoz(Leningrad region,Gatchinskiy district)at different treatment and density control *** has been established that the highest basis density of wood corresponds to the samples grown at the density variant of 1 t/ha and double herbicides treatment,and the lowest basis density value was recorded at the option of 4 t/ha with combined *** has been shown that the increase of width index for early wood is influenced by the lower density of 1 t/ha and one-time herbicide treatment,for late wood–by the lower density of 1 t/ha and repeated treatment with *** increase in average cell wall thickness for early and late wood is observed when the density increases up to 4 t/ha and double herbicides *** results obtained provide a valuable scientific contribution to general forestry knowledge and have practical value in plantation forestry.

关键词： Agroforestry ecosystem services plantation forestry wood structure planting density

Assessment of health risk of the baikal region population associated with the wildfire air pollution:Approaches,modelling,digital environment

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Emerging Contaminants 2023年第1期9卷 33-40页

作者： Natalia Efimova Viacheslav Paramonov viktor Rukavishnikov Roman Fedorov Gennadiy Ruzhnikov Andrei Tsyrendorzhiyev East-Siberian Institute of Medical and Ecological Research 3“12a mikrorayon”Angarsk665827Irkutsk oblastRussia Matrosov Institute for System Dynamics and Control Theory of SB RAS 134 Lermontov St.Irkutsk664033Russia Rospotrebnadzor for the Republic of Buryatia 45Kluchevskaya St.Ulan-Ude670013Republic of BuryatiaRussia

The latest forecasts indicate wildfire activity in many parts of the *** smoke contains hazardous air pollutants such as carbon monoxide,nitrogen dioxide,ozone,particulate matter et ***,prediction of this impact and on time medical care are difficult due to the lack of digital decision-making *** aim of this study is to assess population health risks associated with the sub-daily exposure to wildfire smoke produced by massive foci of combustion near the populated areas and at a significant distance from *** consider reflex reactions as a response to a short-term *** maximum value of the 95th percentile from the series of observations at the monitoring point was used to assess the *** the mathematical description of the“concentration-effect”relationship,the model of individual thresholds is *** model describes a dependence as a straight line under the condition that the concentration is expressed in the form of a normalprobabilistic *** frequency of additional cases is determined by studying the number of requests for medical assistance(including calls for ambulance)with complaints of respiratory disorders,lacrimation,*** the territories affected by wildfires *** indicator is calculated per 1000 *** probability of negative biological effects in response to the impact of wildfire smoke is associated mainly with the content of CO and TPM in the conditions of the Baikal *** frequency of additional requests for medical care ranged from 0.137 to 0.933 per 1000 exposed population during the fire period in settlements where risk levels are>*** developed a digital environment that allows us to get information about harmful substances in the outdoor air from different sources and in different formats and data *** digital environment supports implementation of models for assessing hazards to human body organs.

关键词： Air pollution Wildfire Health risk Digital environment

Propagation of vibrations in thawing deep seasonally frozen soils in railway subgrade

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Research in Cold and Arid Regions 2015年第5期7卷 534-540页

作者： Gennady M.Stoyanovich viktor V.Pupatenko Transport Construction Institute Department of Railway Track and Railway Engineering Far Eastern State Transport University

In this study, in-situ testing results are given, and the analytical relationship of the vibrations＇ amplitudes inside an em- bankment by the thawing of the subgrade surface of seasonably deep frozen soils is provided. The peculiarities of the vi- bration waves＇ propagation during the springtime thawing of soils compared to those during the summertime period and the correlation of the vibrations with the under-rail basement moduln~ nf ala^tieitv nro dofinod

关键词： railroad subgrade vibrational force deep seasonable frost

Small intestinal bacterial overgrowth syndrome

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World Journal of Gastroenterology 2010年第24期16卷 2978-2990页

作者： Jan Bures Jiri Cyrany Darina Kohoutova Miroslav Frstl Stanislav Rejchrt Jaroslav Kvetina viktor Vorisek Marcela Kopacova 2nd Department of Medicine Charles University in Praha Faculty of Medicine at Hradec Kralove University Teaching Hospital Institute of Clinical Microbiology Charles University in Praha Faculty of Medicine at Hradec Kralove University Teaching Hospital Institute of Experimental Biopharmaceutics Joint Research Centre of Czech Academy of Sciences and PRO.MED.CS Praha a.s. Institute of Clinical Biochemistry and Diagnostics Charles University in Praha Faculty of Medicine at Hradec Kralove University Teaching Hospital

Human intestinal microbiota create a complex polymi-crobial ecology. This is characterised by its high population density, wide diversity and complexity of interaction. Any dysbalance of this complex intestinal microbiome, both qualitative and quantitative, might have serious health consequence for a macro-organism, including small intestinal bacterial overgrowth syndrome (SIBO).SIBO is defined as an increase in the number and/or alteration in the type of bacteria in the upper gastro-intestinal tract. There are several endogenous defence mechanisms for preventing bacterial overgrowth: gastric acid secretion, intestinal motility, intact ileo-caecal valve, immunoglobulins within intestinal secretion and bacte-riostatic properties of pancreatic and biliary secretion. Aetiology of SIBO is usually complex, associated with disorders of protective antibacterial mechanisms (e.g. achlorhydria, pancreatic exocrine insuff iciency, immuno-deficiency syndromes), anatomical abnormalities (e.g. small intestinal obstruction, diverticula, f istulae, surgical blind loop, previous ileo-caecal resections) and/or motility disorders (e.g. scleroderma, autonomic neuropathy in diabetes mellitus, post-radiation enteropathy, small intestinal pseudo-obstruction). In some patients more than one factor may be involved. Symptoms related to SIBO are bloating, diarrhoea, malabsorption, weight loss and malnutrition. The gold standard for diagnosing SIBO is still microbial investigation of jejunal aspirates. Noninvasive hydrogen and methane breath tests are most commonly used for the diagnosis of SIBO using glucose or lactulose. Therapy for SIBO must be com-plex, addressing all causes, symptoms and complica-tions, and fully individualised. It should include treatment of the underlying disease, nutritional support and cyclical gastro-intestinal selective antibiotics. Prognosis is usually serious, determined mostly by the underlying disease that led to SIBO.

关键词： Bacterial overgrowth Breath test Hydrogen Methane Small intestine

Implementation of 2D DomainDecomposition in the UCAN Gyrokinetic Particle-in-Cell Code and Resulting Performance of UCAN2

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Communications in Computational Physics 2016年第1期19卷 205-225页

作者： Jean-Noel G.Leboeuf viktor K.Decyk David E.Newman Raul Sanchez Department of Physics University of AlaskaFairbanksAK 99775-5920USA Department of Physics and Astronomy and Institute for Digital Research and Education(IDRE)University of CaliforniaLos AngelesCA 90095-1547USA Departamento de Fsica Universidad Carlos IIILeganes 28911MadridSpain

The massively parallel,nonlinear,three-dimensional(3D),toroidal,electrostatic,gyrokinetic,particle-in-cell(PIC),Cartesian geometry UCANcode,with particle ions and adiabatic electrons,has been successfully exercised to identify non-diffusive transport characteristics in present day tokamak *** limitation in applying UCAN to larger scale discharges is the 1D domain decomposition in the toroidal(or z-)direction for massively parallel implementation using MPI which has restricted the calculations to a few hundred ion Larmor radii or gyroradii per plasma minor *** exceed these sizes,we have implemented 2D domain decomposition in UCANwith the addition of the y-direction to the processor *** has been facilitated by use of relevant components in the P2LIB library of field and particle management routines developed for UCLA’s UPIC Framework of conventional PIC *** gyroaveraging specific to gyrokinetic codes is simplified by the use of replicated arrays for efficient charge accumulation and force *** 2D domain-decomposed UCAN2 code reproduces the original 1D domain nonlinear results within *** of UCAN2 on the Cray XC30 Edison at NERSC demonstrate ideal scaling when problem size is increased along with processor number up to the largest power of 2 available,namely 131,072 *** particle weak scaling benchmarks also indicate that the 1 nanosecond per particle per time step and 1 TFlops barriers are easily broken by UCAN2 with 1 billion particles or more and 2000 or more processors.

关键词： Gyrokinetic simulation particle-in-cell method massive parall

Supercritical fluids:Clean solvents for green chemistry

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Chinese Journal of Chemistry 1999年第3期17卷 212-222,201页

作者： POLIAKOFF Martyn GEORGE Michael W. HOWDLE Steven M. BAGRATASHVILI viktor N. 韩布兴闫海科 LaserChem Scientific Centre for Technological Lasers of the Russian Academy of Sciences Troitzk (Moscow Region) Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Department of Chemistry The University of Nottingham Nottingham NG7 2RD England

Supercritical fluids are becoming increasingly attractive as environmentally acceptable replacement for organic solvents in chemical reactions and material processing. This paper highlights some of the properties of supercritical fluids, especially supercritical CO2, which offer particular advantages for the handling of polymers, metal complexes and the environmentally more friendly synthesis and manufacture of chemicals. The paper includes same of the researches in University of Nottingham and a number of recent reviews which together provide a comprehensive introduction.

关键词： Green chemistry supercritical fluids chemical reaction water rapid expansion antisolvent

Coexisting charge density wave and ferromagnetic instabilities in monolayer InSe

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npj Computational Materials 2022年第1期8卷 1101-1109页

作者： Evgeny A.Stepanov viktor Harkov Malte Rösner Alexander I.Lichtenstein Mikhail I.Katsnelson Alexander N.Rudenko CPHT CNRSEcole PolytechniqueInstitut Polytechnique de ParisF-91128PalaiseauFrance I.Institute of Theoretical Physics University of HamburgNotkestraße 922607HamburgGermany European X-Ray Free-Electron Laser Facility Holzkoppel 422869SchenefeldGermany Radboud University Institute for Molecules and Materials6525AJNijmegenThe Netherlands The Hamburg Centre for Ultrafast Imaging Luruper Chaussee 14922761HamburgGermany

Recently fabricated InSe monolayers exhibit remarkable characteristics that indicate the potential of this material to host a number of many-body *** this work,we systematically describe collective electronic effects in hole-doped InSe monolayers using advanced many-body *** this end,we derive a realistic electronic-structure model from first principles that takes into account the most important characteristics of this material,including a flat band with prominent van Hove singularities in the electronic spectrum,strong electron–phonon coupling,and weakly screened long-ranged Coulomb *** calculate the temperature-dependent phase diagram as a function of band filling and observe that this system is in a regime with coexisting charge density wave and ferromagnetic instabilities that are driven by strong electronic Coulomb *** regime can be achieved at realistic doping levels and high enough temperatures,and can be verified *** find that the electron–phonon interaction does not play a crucial role in these effects,effectively suppressing the local Coulomb interaction without changing the qualitative physical picture.

关键词： ferromagnetic charge wave

Reperfusion injury after critical intestinal ischemia and its correction with perfluorochemical emulsion "perftoran"

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World Journal of Gastroenterology 2005年第45期11卷 7084-7090页

作者： Vyacheslav Leontjevich Kozhura Dmitriy Alexeevich Basarab Marina Innokentievna Timkina Arkadiy Mikhailivich Golubev Vasiliy Ivanovich Reshetnyak viktor Vasiljevich Moroz Research Institute of General Reanimatology

AIM： To investigate the anti-ischemic properties of perfluorochemical emulsion ＂perftoran＂ in mesenteric region. METHODS： Experiments were conducted on 146 nonlinear white male rats weighing 200-350 g. Partial critical intestinal ischemia was induced by thorough atraumatic strangulation of 5-6 cm jejunal loop with its mesentery for 90 rain. Global critical intestinal ischemia was made by atraumatic occlusion of the cranial mesenteric artery （CMA） for 90 rain also. Perftoran （PF, 0.8-1.0 mL per 100 g） in experimental groups or 0.9% sodium chloride in control groups was injected at 75 rain of ischemic period. Mean systemic arterial blood pressure （BPM） registration, intravital microscopy and morphological examination of ischemic intestine and its mesentery were performed in both groups. RESULTS： During 90 min of reperfusion, BPM progressively decreased to 27.3±7.4% after PF administration vs 38.6±8.0% in the control group of rats with partial intestinal ischemia （NS） and to 50.3±6.9% vs 53.1±5.8% in rats after global ischemia （NS）. During the reperfusion period, full restoration of microcirculation was never registered; parts with restored blood flow had leukocyte and erythrocyte stasis and intra-vascular clotting, a typical ＂non-reflow＂phenomenon. The reduction of mesenteric 50-400 μm feeding artery diameter was significantly less in the PF group than in the control group （24±5.5% vs 45.2±3.6%, P〈0.05） 5 min after partial intestinal ischemia. This decrease progressed but differences between groups minimized at the 90th min of reperfusion （41.5±4.2% and 50.3±2.8%, respectively）. In reperfusion of rat＇s intestine, a significant mucosal alteration was registered. Villous height decreased 2.5-3 times and the quantity of crypts decreased more than twice. In the group of rats administered PF, intestinal mucosal layer was protected from irreversible post-ischemic derangement during reperfusion. Saved cryptal epithelial cells were the source of regeneration of the epithelium

关键词： Rats Ischemia-reperfusion injury Gut Intestine Perfluorocarbon emulsions

Ab initio theory of the negatively charged boron vacancy qubit in hexagonal boron nitride

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npj Computational Materials 2020年第1期6卷 1332-1337页

作者： viktor Ivády Gergely Barcza GergőThiering Song Li Hanen Hamdi Jyh-Pin Chou Örs Legeza Adam Gali Wigner Research Centre for Physics PO Box 49Budapest 1525Hungary Department of Physics Chemistry and BiologyLinköping University58183 LinköpingSweden J.HeyrovskýInstitute of Physical Chemistry Academy of Sciences of the Czech RepublicDolejškova 318223 Prague 8Czech Republic Department of Mechanical Engineering City University of Hong KongKowloon TongHong KongChina Department of Atomic Physics Budapest University of Technology and EconomicsBudafokiút 8.Budapest 1111Hungary

Highly correlated orbitals coupled with phonons in two-dimension are identified for paramagnetic and optically active boron vacancy in hexagonal boron nitride by first principles methods which are responsible for recently observed optically detected magnetic resonance ***,we report ab initio analysis of the correlated electronic structure of this center by density matrix renormalization group and Kohn-Sham density functional theory *** establishing the nature of the bright and dark states as well as the position of the energy levels,we provide a complete description of the magneto-optical properties and corresponding radiative and non-radiative routes which are responsible for the optical spin polarization and spin dependent luminescence of the *** findings pave the way toward advancing the identification and characterization of room temperature quantum bits in two-dimensional solids.

关键词： boron hexagonal vacancy