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成像板对X射线的能量响应

原子能科学技术 2009年第7期43卷 644-647页

作者：骆志平 c. suzuki T. Kosako 马吉增中国原子能科学研究院辐射安全研究部北京102413 中国辐射防护研究院山西太原030006 清华大学工程物理系北京100084 东京大学日本东京1130032

作为X射线探测器,成像板的光激发光子信号对X射线的能量响应是非常重要的数据。利用同步辐射光源的单能X射线照射成像板,得到成像板对低能光子的能量响应曲线,并与McNP程序计算结果进行对比分析,得到成像板响应函数的衰减模型。计算结... 详细信息

作为X射线探测器,成像板的光激发光子信号对X射线的能量响应是非常重要的数据。利用同步辐射光源的单能X射线照射成像板,得到成像板对低能光子的能量响应曲线,并与McNP程序计算结果进行对比分析,得到成像板响应函数的衰减模型。计算结果与实验结果一致,为进一步开展成像板在辐射测量领域的研究工作提供了参考。

关键词：成像板能量响应 X射线衰减模型

Accelerator Neutron Dosimetry Using composite Proportional counting Tube

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Accelerator Neutron Dosimetry Using Composite Proportional C...

作者： M.Hashimoto T.Usui c.suzuki T.Shimada A.cooper-Roy T.Abe Y.Koike T.Kosako H&S Division O-arai Engineering CenterJAEA School of Engineering The University of Tokyo Radioisotope center The University of Tokyo

INTRODUcTION:The composite proportional counting tube which is filled with He-cH mixed-gas is *** has compound characteristics for neutron *** detects thermalized neutron while cH is provided for relatively fast neutron *** output of each reaction can be distinguished with PHA analyzing because the scattered charged particle with fast neutron composes a continuous spectrum while the thermal neutron absorption composes a peaked *** ratio of each reaction reflects the neutron energy distribu-

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用半导体颜色传感器检测空气中缺氧情况

仪器仪表与分析监测 1986年第2期 51-53页

作者： N.KAKO N.TA NAKA c.suzuki 夏建弘

一、前言在频谱和颜色测量中,往往需要大型和复杂的仪器。然而人们对传感器的要求是必须体积小,可靠性高而且价格便宜。一种半导体颜色传感器已由sharp提出。这种传感器体积小,原理简单,而且很容易分辨颜色。在日本,冬天屋内通常用煤气... 详细信息

一、前言在频谱和颜色测量中,往往需要大型和复杂的仪器。然而人们对传感器的要求是必须体积小,可靠性高而且价格便宜。一种半导体颜色传感器已由sharp提出。这种传感器体积小,原理简单,而且很容易分辨颜色。在日本,冬天屋内通常用煤气加热器,煤炉加热器和石油炉。当煤气炉或石油炉在通风不良的房间中使用较长时间时,房间

关键词：颜色传感器视觉传感器缺氧情况空气工业气体

High-temperature corrosion of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho)environmental barrier coating materials by volcanic ash

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1628-1638页

作者： Ayahisa Okawa Son Thanh Nguyen Tadachika Nakayama Thi-Mai-Dung Do Hisayuki Suematsu Shu Yin Takuya Hasegawa Tsuneo suzuki Takashi Goto Koichi Niihara Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan Department of creative Engineering National Institute of TechnologyKushiro 084-0916Japan Extreme Energy-Density Research Institute Nagaoka University of TechnologyNagaoka 940-2188Japan Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

Rare-earth silicates are promising environmental barrier coatings(EBcs)that can protect Sic_(f)/Si c_(m)substrates in next-genera tion gas turbine ***,RE_(2)Si_(2)O_(7)(RE=Yb and Ho)shows potential as an EBc due to its coefficient of thermal expansion(cTE)compatible with substrates and high resistance to water vapor *** target operating temperature for next-generation tur bine blades is 1400°*** is inevitable during adhesion to molten volcanic ash,and thus,understanding the corrosion behavior o the material is crucial to its *** study investigates the high-temperature corrosion behavior of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho).Samples were prepared using a solid-state reaction and hot-press *** were then exposed to volcanic ash at 1400°c for 224,and 48 *** 48 h of exposure,volcanic ash did not react with Yb_(2)Si_(2)O_(7)but penetrated its interior,causing *** Ho_(2)Si_(2)O_(7)was partially dissolved in the molten volcanic ash,forming a reaction zone that prevented volcanic ash melts from penetrating the *** increasing heat treatment time,the reaction zone expanded,and the thickness of the acicular apatite grains increased The ca:Si ratios in the residual volcanic ash were mostly unchanged for Yb_(2)Si_(2)O_(7)but decreased considerably over time for Ho_(2)Si_(2)O_(7).Th ca in volcanic ash was consumed and formed apatite,indicating that RE^(3+)ions with large ionic radii(Ho>Yb)easily precipitated apatit from the volcanic ash.

关键词： environmental barrier coating volcanic ash rare-earth disilicate corrosion

Expression levels of K_(ATP)channel subunits and morphological changes in the mouse liver after exposure to radiation

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World Journal of Experimental Medicine 2024年第2期14卷 103-113页

作者： Ming Zhou Tao-Sheng Li Hiroshi Abe Hideo Akashi Ryoji suzuki Yoshio Bando Department of Anatomy Akita University Graduate School of MedicineAkita 010-8543Japan Department of Stem cell Biology Atomic Bomb Disease InstituteNagasaki UniversityNagasaki 852-8523Japan Sendai Old Age Refresh Station A Long-term Care Health FacilitySendai 981-1105Japan

BAcKGROUND ATP sensitive K+(K_(ATP))channels are ubiquitously distributed in various of cells and tissues,including the *** play a role in the pathogenesis of myocardial and liver *** To evaluate the radiation-induced changes in the expression of K_(ATP)channel subunits in the mouse liver to understand the potential role of K_(ATP)channels in radiation *** Adult c57BL/6 mice were randomly exposed toγ-rays at 0 Gy(control,n=2),0.2 Gy(n=6),1 Gy(n=6),or 5 Gy(n=6).The livers were removed 3 and 24 h after radiation *** and eosin staining was used for morphological observation;immunohistochemical staining was applied to determine the expression of K_(ATP)channel subunits in the liver *** compared with the control group,the livers exposed to 0.2 Gyγ-ray showed an initial increase in the expression of Kir6.1 at 3 h,followed by recovery at 24 h after *** to a high dose of 5.0 Gy resulted in decreased expression of Kir6.1 and increased expression of SUR2B at 24 ***,the expression of Kir6.2,SUR1,or SUR2A had no remarkable changes at 3 and 24 h after exposure to any of these *** The expression levels of Kir6.1 and SUR2B in mouse liver changed differently in response to different radiation doses,suggesting a potential role for them in radiation-induced liver injury.

关键词： Radiation exposure ATP-sensitive K^(+)channel Mouse Liver

current perspectives of viral

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World Journal of Gastroenterology 2024年第18期30卷 2402-2417页

作者： Daisuke Usuda Yuki Kaneoka Rikuo Ono Masashi Kato Yuto Sugawara Runa Shimizu Tomotari Inami Eri Nakajima Shiho Tsuge Riki Sakurai Kenji Kawai Shun Matsubara Risa Tanaka Makoto suzuki Shintaro Shimozawa Yuta Hotchi Ippei Osugi Risa Katou Sakurako Ito Kentaro Mishima Akihiko Kondo Keiko Mizuno Hiroki Takami Takayuki Komatsu Tomohisa Nomura Manabu Sugita Department of Emergency and critical care Medicine Juntendo University Nerima HospitalNerima 177-8521TokyoJapan Department of Sports Medicine Faculty of MedicineJuntendo UniversityBunkyo 113-8421TokyoJapan

Viral hepatitis represents a major danger to public health,and is a globally leading cause of *** five liver-specific viruses:Hepatitis A virus,hepatitis B virus,hepatitis c virus,hepatitis D virus,and hepatitis E virus,each have their own unique epidemiology,structural biology,transmission,endemic patterns,risk of liver complications,and response to antiviral *** remain few options for treatment,in spite of the increasing prevalence of viral-hepatitiscaused liver ***,chronic viral hepatitis is a leading worldwide cause of both liver-related morbidity and mortality,even though effective treatments are available that could reduce or prevent most patients’*** 2016,the World Health Organization released its plan to eliminate viral hepatitis as a public health threat by the year 2030,along with a discussion of current gaps and prospects for both regional and global eradication of viral ***,treatment is sufficiently able to prevent the disease from reaching advanced ***,future therapies must be extremely safe,and should ideally limit the period of treatment necessary.A better understanding of pathogenesis will prove beneficial in the development of potential treatment strategies targeting infections by viral *** review aims to summarize the current state of knowledge on each type of viral hepatitis,together with major innovations.

关键词： Hepatitis A virus Hepatitis B virus Hepatitis c virus Hepatitis D virus Hepatitis E virus current perspectives

change in microstructural characteristics of laser powder bed fused Al–Fe binary alloy at elevated temperature

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Journal of Materials Science & Technology 2022年第2期97卷 38-53页

作者： Xing Qi Naoki Takata Asuka suzuki Makoto Kobashi Masaki Kato Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan Aichi center for Industry and Science Technology 1267-1 AkiaiYakusa-choToyota 470-0356Japan

The present study addressed the change in the microstructure of Al-2.5 wt%Fe binary alloy produced using laser powder bed fusion(L-PBF)technique by thermal exposure at 300℃,and the associated mechanical and thermal properties were systematically examined as ***-semi-cylindrical patterns corresponding to melt pools in the microstructure were macroscopically observed for the asmanufactured *** change in the melt-pool morphology was observed after thermal exposure for1000 *** the melt pools,a large number of the nanoscale metastable Al6 Fe phase particles were uniformly distributed inside columnar grains of theα-Al matrix containing concentrated solute Fe in *** sequential formation and coarsening of stableθ-Al13 Fe4 phases were observed upon exposure to a 300℃ environment,but a considerable amount of nano-sized metastable Al6 Fe phases remained even after 1000 ***,the thermal exposure continuously reduced the concentration of solute Fe atoms in theα-Al *** significant grain growth was found inα-Al matrix after 1000 h owing to the pinning effect of the dispersed fine particles on grain boundary *** results demonstrate a sluggish change in microstructural morphologies of the Al-2.5 wt%Fe *** quantified microstructural parameters addressed dominant strengthening contributions by the solid solution of Fe element and Orowan strengthening mechanism by fine Al-Fe intermetallics in the L-PBF-produced *** high strength level was sustained even after being exposed to 300℃ for long *** superior balance of mechanical properties and thermal conductivity can be achieved in the experimental alloys by taking advantage of the various microstructural parameters related to the Al-Fe intermetallic phases andα-Al matrix.

关键词： Al-Fe alloy Laser powder bed fusion Phase transformation Microstructure Tensile properties

Physical fitness before and during the cOVID-19 pandemic:Results of annual national physical fitness surveillance among 16,647,699 Japanese children and adolescents between 2013 and 2021

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Journal of Sport and Health Science 2023年第2期12卷 246-254页

作者： Tetsuhiro Kidokoro Grant R.Tomkinson Justin JLang Koya suzuki Research Institute for Health and Sport Science Nippon Sport Science UniversityTokyo 158-8508Japan Graduate School of Health and Sports Science Juntendo UniversityInzai City 270-1695Japan Alliance for Research in Exercise Nutrition and Activity(ARENA)University of South AustraliaAdelaideSA 5000Australia centre for Surveillance and Applied Research Public Health Agency of CanadaOttawaON K1A 0K9Canada School of Epidemiology and Public Health University of OttawaOttawaON K1H 8M5Canada Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario Research InstituteOttawaON K1H 8L1Canada

Background:Limited nationally representative evidence is available on temporal trends in physical fitness(PF)for children and adolescents during the coronavirus disease 2019(cOVID-19)*** primary aim was to examine the temporal trends in PF for Japanese children and adolescents before and during the cOVID-19 *** secondary aim was to estimate the concurrent trends in body size(measured as body mass and height)and movement behaviors(exercise,screen,and sleep time).Methods:census PF data for children in Grade 5(aged 10-11 years)and adolescents in Grade 8(aged 13-14 years)were obtained for the years 2013-2021 from the National Survey of Physical Fitness,Athletic Performance,and Exercise Habits in Japan(n=16,647,699).PF and body size were objectively measured,and movement behaviors were *** sample-weighted linear regression,temporal trends in mean PF were calculated before the pandemic(2013-2019)and during the pandemic(2019-2021)with adjustments for age,sex,body size,and exercise ***:When adjusted for age,sex,body size,and exercise time,there were significant declines in PF during the pandemic,with the largest declines observed in 20-m shuttle run(standardized(cohen’s)effect size(ES)=-0.109 per annum(p.a.))and sit-ups performance(ES=-0.133p.a.).The magnitude of the declines in 20-m shuttle run and sit-ups performances were 18-and 15-fold larger,respectively,than the improvements seen before the pandemic(2013-2019),after adjusting for age,sex,body size,and exercise *** the pandemic,both body mass and screen time significantly increased,and exercise time ***:Declines in 20-m shuttle run and sit-ups performances suggest corresponding declines in population health during the cOVID-19pandemic.

关键词： census Physical inactivity Public health Temporal trends Youth

Degradative solvent extraction of subbituminous coal with deep eutectic solvent and effect of reaction conditions on products

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carbon Resources conversion 2023年第1期6卷 43-50页

作者： Pedro Domingos Dauce Ryo suzuki Ayano Nakamura Kenji Murakami Department of Material Science Graduate School of Engineering ScienceAkita University1-1 Tegata Gakuen-tyoAkita-shiAkita 010-8502Japan

A degradative solvent extraction method for upgrading low-rank coal was performed at 200-350◦c for 90 min to obtain a substance dissolved in the solvent at room temperature(Soluble).Because the resulting mixture exhibited a high carbon content without ash,it could be readily used as a ***,deep eutectic solvents(DESs)have attracted attention for improving the Soluble yield and decreasing the oxygen content in *** is known to cleave oxygen-containing functional groups in biomass and is considered effective for deoxidizing low-rank ***,DES was prepared by mixing choline chloride,Fecl3⋅6H2O,and Adaro subbituminous coal(AD)and then added to 1-methylnaphthalene(1-MN)in a non-polar solvent,followed by degradative solvent extraction in the range of 200-350◦*** effects of reaction temperature and added DES amount on the product yield and the composition were *** the reaction temperature and amount of DES added increased,the Soluble yield and carbon content *** was also found that the thermal decomposition temperature and oxygen content decreased with the increasing DES *** decrease indicates that DES promotes the deoxygenation and decomposition of AD and increases the soluble yield of the fuel source.

关键词： Low-rank coal Degradative solvent extraction Deep eutectic solvent Reaction temperature Upgrading