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Microwave Radiation Effects on the Process of Escherichia coli Cultivation
Kuznetsov, Denis,Volkhin, Igor,Orlova, Ekaterina,Neschislyaev, Valery,Balandina, Alevtina,Shirokikh, Anna The Korean Society for Microbiology and Biotechnol 2019 한국미생물·생명공학회지 Vol.47 No.3
Modern biotechnological industries have been attempting to improve the efficiency of bacterial strain cultivation. Millimeter wave electromagnetic radiation can have a varied influence on E. coli cultivation processes. The results of the study revealed that when a microwave radiation of low intensity is applied to positively adjust the conditions for the accumulation of bacterial culture biomass, a significant role is played not only by radiation parameters, but also by concomitant biological factors, which influence the reproducibility of the cultivation process and help obtain a useful biotechnological effect. The authors suggest a model that can be used to study the molecular mechanisms underlying the changes in the buildup of E. coli biomass under the influence of electromagnetic radiation.
Kuznetsov, Ilya Korea FoodHealth Convergence Association 2018 식품보건융합연구 (KJFHC) Vol.4 No.3
In the Republic of Belarus as well as in the world acute problem of protecting forests from diseases and pests. The damage caused by root rot is essential, therefore, the problem of forest protection is an urgent task. The biologics has the greatest prospects in according with traditional methods of struggle. Deep method of cultivation of a mushroom Phlebiopsis gigantea with use of nutrient mediums on the basis of ethanol stillage and its components (fugat) is researched. Feasibility of use stillage as raw materials in production of a biological product for the wood protection against root decay is shown. The effect of different additives (sawdust, fodder yeast) on the accumulation of reactive biological product - oidy has been studed It was determined that the deep cultivation using sawdust of the highest accumulation oidy (1.5 $10^6units/ml$). It was also found that the stillage is the best breeding ground for fungus biomass accumulation (7.9 9.8 g / l) versus fugat (6.0 6.6 g / l). On the basis of research work the technological scheme for production of a biological product were developed. Based on the conducted studies, a technological scheme was proposed for obtaining a biological preparation by deep cultivation of the fungus Phlebiopsis gigantea.
Evidence for a narrow structure at W∼1.68 GeV in η photoproduction off the neutron
Kuznetsov, V.,Churikova, S.,Gervino, G.,Ghio, F.,Girolami, B.,Ivanov, D.,Jang, J.,Kim, A.,Kim, W.,Ni, A.,Vorobiev, Yu.,Yurov, M.,Zabrodin, A. North-Holland Pub. Co 2007 Physics letters: B Vol.647 No.1
New results on quasi-free η photoproduction on the neutron and proton bound in a deuteron target are presented. The γn->ηn quasi-free cross section reveals a bump-like structure which is not seen in the cross section on the proton. This structure may signal the existence of a relatively narrow (M∼1.68 GeV, Γ=<30 MeV) baryon state.
Viacheslav Kuznetsov,Jooyoung Jang,Andrey Kim,김우영,이상훈,니안드레이,Yuseok Kim,Minyoung Lee,Taekeun Yang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
The first measurement of the time-of-flight (TOF) resolution of a Bicron-408 scintillation counter equipped with magnetic-resistant fine-mesh Hamamatsu R7761-70 photomultipliers is presented. The data were obtained using the proton beam of the MC50 Cyclotron of the Korea Institute of Radiological and Medical Sciences (KIRAMS). The TOF resolution for ~45-MeV protons is 18.2 ps. Its dependence on the light output L is well fitted by 41.6ps/L/LMIP , where LMIP denotes the light output produced by relativistic minimum-ionizing muons which deposit ΔE ~ 6 MeV in the detector volume. The first measurement of the time-of-flight (TOF) resolution of a Bicron-408 scintillation counter equipped with magnetic-resistant fine-mesh Hamamatsu R7761-70 photomultipliers is presented. The data were obtained using the proton beam of the MC50 Cyclotron of the Korea Institute of Radiological and Medical Sciences (KIRAMS). The TOF resolution for ~45-MeV protons is 18.2 ps. Its dependence on the light output L is well fitted by 41.6ps/L/LMIP , where LMIP denotes the light output produced by relativistic minimum-ionizing muons which deposit ΔE ~ 6 MeV in the detector volume.
Time-of-Flight System for a CTOF Prototype Counter with Fine-Mesh and Standard Photomultipliers
Viacheslav Kuznetsov,Sergey Chebotarev,Hoseog Dho,Jonghyuk Jang,Andrey Kim,김우영,Evgeniy Milman,니안드레이 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.3
The upgrade of Continuous Electron Beam Accelerator Facility (CEBAF) is undergo since 2010. The updated CEBAF Large Acceptance Spectrometer (CLAS12) detector is being developed for the JLab upgrade program up to 12 GeV. One of the important component of CLAS12 will be the central time-of-flight system (CTOF). The CTOF will provide detection and identification of charged particles emitted at central angles from 40 to 130. The design goal is to achieve a time-offlight resolution TOF = 50 ps. This study evaluated the timing properties of the CTOF prototype counter. The performance of the upgraded prototype 3 × 3.2 × 66 cm3 scintillation bar of BC-408,coupled to fine-mesh R5924-70 and R7761-70 Hamamatsu photomultipliers via acrylic light guides,has been measured by using two different methods: cosmic rays at Kyungpook National University (KNU), and proton beams at the MC-50 cyclotron of the Korea Institute of Radiological & Medical Sciences (KIRAMS). The gain and the timing resolution of fine-mesh PMs were compared with a conventional Hamamatsu R2083 PM. In the cosmic-ray test, the TOF resolutions were measured to be FM.PM = 79 ± 0.75stat ± 4syst ps and R2083 = 73 ± 1.3stat ± 4syst ps for fine-mesh and ordinary photomultipliers, respectively. With proton beams, these values were FM.PM = 39.1 ±0.55 ps and R2083 = 35.0 ± 0.54 ps at count rate 0.15 MHz. These remained constant at higher count rates up to 1.5 MHz. The average ratio of the fine-mesh to the ordinary PM resolutions was 1.123 ± 0.02. The upgrade of Continuous Electron Beam Accelerator Facility (CEBAF) is undergo since 2010. The updated CEBAF Large Acceptance Spectrometer (CLAS12) detector is being developed for the JLab upgrade program up to 12 GeV. One of the important component of CLAS12 will be the central time-of-flight system (CTOF). The CTOF will provide detection and identification of charged particles emitted at central angles from 40 to 130. The design goal is to achieve a time-offlight resolution TOF = 50 ps. This study evaluated the timing properties of the CTOF prototype counter. The performance of the upgraded prototype 3 × 3.2 × 66 cm3 scintillation bar of BC-408,coupled to fine-mesh R5924-70 and R7761-70 Hamamatsu photomultipliers via acrylic light guides,has been measured by using two different methods: cosmic rays at Kyungpook National University (KNU), and proton beams at the MC-50 cyclotron of the Korea Institute of Radiological & Medical Sciences (KIRAMS). The gain and the timing resolution of fine-mesh PMs were compared with a conventional Hamamatsu R2083 PM. In the cosmic-ray test, the TOF resolutions were measured to be FM.PM = 79 ± 0.75stat ± 4syst ps and R2083 = 73 ± 1.3stat ± 4syst ps for fine-mesh and ordinary photomultipliers, respectively. With proton beams, these values were FM.PM = 39.1 ±0.55 ps and R2083 = 35.0 ± 0.54 ps at count rate 0.15 MHz. These remained constant at higher count rates up to 1.5 MHz. The average ratio of the fine-mesh to the ordinary PM resolutions was 1.123 ± 0.02.
Microwave Radiation Effects on the Process of Escherichia coli Cultivation
( Denis Kuznetsov ),( Igor Volkhin ),( Ekaterina Orlova ),( Valery Neschislyaev ),( Alevtina Balandina ),( Anna Shirokikh ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 한국미생물·생명공학회지 Vol.47 No.3
Modern biotechnological industries have been attempting to improve the efficiency of bacterial strain cultivation. Millimeter wave electromagnetic radiation can have a varied influence on E. coli cultivation processes. The results of the study revealed that when a microwave radiation of low intensity is applied to positively adjust the conditions for the accumulation of bacterial culture biomass, a significant role is played not only by radiation parameters, but also by concomitant biological factors, which influence the reproducibility of the cultivation process and help obtain a useful biotechnological effect. The authors suggest a model that can be used to study the molecular mechanisms underlying the changes in the buildup of E. coli biomass under the influence of electromagnetic radiation.
Droplet Spreading and Wettability of Abrasive Processed Aluminum Alloy Surfaces
G. V. Kuznetsov,E. G. Orlova,D. V. Feoktistov,A. G. Islamova,A. V. Zhuikov 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.1
One of the main cause of a droplet metastable state is found to be surface roughness. This state is characterized by a largecontact angle hysteresis and condition when the static contact angle is larger than the advancing dynamic contact angle. Besides the texture, other factors can influence the deviation from the equilibrium state, in particular, the fluid flow rate (thegrowth rate of a droplet) affecting the contact line speed. An experimental study was done to determine the effect of roughnessand fluid flow rate on wetting of aluminum-magnesium alloy surfaces with random roughness processed by abrasivepolishing. Three-dimensional roughness parameters were used to evaluate their texture. The correlations between theseparameters, static, advancing and receding dynamic contact angles, hysteresis, and contact line speed were obtained. Themolecular-kinetic theory of wetting was used to interpret the dynamic contact angle data.