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可见光驱动改性氮化碳无牺牲剂光催化析氢

Chinese Journal of Catalysis 2022年第9期43卷 2316-2320页

作者： Shunta nishioka Kengo shibata Yugo Miseki Kazuhiro Sayama Kazuhiko Maeda 东京工业大学理学院化学系日本国家先进工业科学技术研究所全球零排放研究中心日本

载铂石墨氮化碳(g-C_(3)n_(4))是一种较好的可见光下催化析氢光催化剂.但催化水裂解需要牺牲电子供体,如三乙醇胺等.目前,无牺牲剂条件下g-C_(3)n_(4)的催化析氢仍是一个挑战.本文通过尿素热处理制备了氮化碳纳米片(nS-C_(3)n_(4)),并... 详细信息

载铂石墨氮化碳(g-C_(3)n_(4))是一种较好的可见光下催化析氢光催化剂.但催化水裂解需要牺牲电子供体,如三乙醇胺等.目前,无牺牲剂条件下g-C_(3)n_(4)的催化析氢仍是一个挑战.本文通过尿素热处理制备了氮化碳纳米片(nS-C_(3)n_(4)),并研究了其在可见光(λ>400 nm)下利用可逆电子给体无牺牲剂条件下析氢的光催化活性.在含有I−,Fe^(2+)或[Fe(Cn)_(6)]^(4−)的水溶液中,负载铂的nS-C_(3)n_(4)上无H_(2)产生,用CrO_(x)改性Pt/nS-C_(3)n_(4)的光催化剂上可观察到H_(2)的析出.透射电镜和能量色散X射线光谱结果表明,在nS-C_(3)n_(4)上形成了Pt/CrO_(x)核壳结构.在[Fe(Cn)_(6)]^(3−/4−)氧化还原介质存在下,CrO_(x)/Pt/nS-C_(3)n_(4)与改性WO_(3)光催化剂在可见光下共同催化水分解析氢.

关键词：人工光合成太阳燃料水分解

Deformation mechanism of bimodal microstructure in Ti-6Al-4V alloy:The effects of intercritical annealing temperature and constituent hardness

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Journal of Materials Science & Technology 2021年第12期71卷 138-151页

作者： Yan Chong Tilak Bhattacharjee Yanzhong Tian Akinobu shibata nobuhiro Tsuji Department of Materials Science and Engineering Kyoto UniversityKyotoJapan Department of Materials Science and Engineering University of CaliforniaBerkeleyCAUSA Elements Strategy Initiative for Structural Materials(ESISM) Kyoto UniversityKyotoJapan Key Laboratory for Anisotropy and Texture of Materials School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China

The so-called bimodal microstructure of Ti-6 Al-4 V alloy,composed of primaryαgrains(α_(p))and transformed β areas(β_(trans)),can be regarded as a"dual-phase"structure to some extent,the mechanical properties of which are closely related to the sizes,volume fractions,distributions as well as nanohardness of the two constituents.In this study,the volume fractions of primaryαgrains(vol.%(α_(p)))were systematically modified in three series of bimodal microstructures with fixed primaryαgrain sizes(0.8μm,2.4μm and 5.0μm),by changing the intercritical annealing temperature(T_(int)).By evaluating the tensile properties at room temperature,it was found that with increasing T_(int)(decreasing vol.%(α_(p))),the yield strength of bimodal microstructures monotonically increased,while the uniform elongation firstly increased with T_(int)until 910°C and then drastically decreased afterwards,thereby dividing the T_(int)into two regions,namely region I(830-910°C)and region II(910-970℃).The detailed deformation behaviors within the two regions were studied and compared,from the perspectives of strain distribution analysis,slip system analysis as well as dislocation analysis.For bimodal microstructures in region I,due to the much lower nano-hardness ofβ_(trans)thanα_(p),there was a clear strain partitioning between the two constituents as well as a strain gradient from theα_(p)/β_(trans)interface to the grain interior ofα_(p).This activated a large number of geometrically necessary dislocations(GnDs)near the interface,mostly with components,which contributed greatly to the extraordinary work-hardening abilities of bimodal microstructures in region I.With increasing T_(int),theα_(p)/β_(trans)interface length density gradually increased and so was the density of GnDs with components,which explained the continuous increase of uniform elongation with T_(int)in this region.For bimodal microstructures in region II,where the nano-hardness ofβ_(trans)andα_(p)were comparable,neither a clear strain-partitioning tendency nor a strain gradien

关键词： Ti-6Al-4V Bimodal microstructure Intercritical annealing temperature Strain distribution dislocation

Investigating drivers of active nitrification in organic horizons of tropical forest soils

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Soil Ecology Letters 2023年第3期5卷 89-99页

作者： Shinichi Watanabe Makoto shibata Yoshiko Kosugi Lion Marryanna Keitaro Fukushima Arief Hartono Shinya Funakawa Graduate School of Global Environmental Studies Kyoto UniversityKitashirakawa Oiwake-choSakyo-kuKyoto606-8502Japan Graduate School of Agriculture Kyoto UniversityKitashirakawa Oiwake-choSakyo-kuKyoto606-8502Japan Forest Research Institute Malaysia 52109 KepongSelangorMalaysia Center for Ecological Research Kyoto University509-3Hirano 2-chomeOtsu-shiShiga520-2113Japan Faculty of Agriculture Bogor Agricultural UniversityJalan MerantiKampus IPB Darmaga 16680BogorIndonesia

High nitrate leaching has been observed from the O horizons of some tropical forests;however,the drivers of high nitrate production(active nitrification)in these O horizons have not yet been identified.This study investigated the drivers of active nitrification in the O horizon of tropical forest soils by focusing on two of the most widely recognized controlling factors of nitrification,total n,and pH.We collected mineral and O horizons from eight tropical forests in Cameroon,Indonesia,and Malaysia and measured gross nitrification rates.Some O horizons showed significantly higher gross nitrification rates than mineral horizons,indicating that these O horizons have a high potential for nitrification.Gross nitrification rates in the O horizons were positively correlated with both total n and pH,and the chemical properties(e.g.,total content of n,P,and base cations)were intercorrelated.These correlations suggested that the underlying driver of nitrification in the O horizon was nutrient richness in the litter.Results also indicated a threshold of gross nitrification rates around pH values of 5.5–6.0.We elucidate that active nitrification and subsequent high nitrate leaching from the O horizon could be driven by nutrient-rich litter,possibly derived from soil fertility and tree species.

关键词： nitrogen dynamics gross nitrification rate organic horizon forest floor acidic soil leguminous trees

A new Reducing Regent; Dichloroindium Hydride

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复旦学报（自然科学版） 2005年第5期44卷 646-647页

作者： A. BABA I. shibata n. HAYASHI Deparment of Applied Chemistry Faculty of Engineering Osaka University Suita Osaka565-0871 JapanDeparment of Applied Chemistry Faculty of Engineering Osaka University Suita Osaka565-0871 JapanDeparment of Applied Chemistry Faculty of Engineering Osaka University Suita Osaka565-0871 Japan

Among the hydride derivatives of group 13 elements, various types of aluminum hydrides and boron hydrides have been employed as powerful reduction tools. Indium hydrides have not received much attention,whereas the synthesis of indium trihydride (InH3) was reported several decades ago[1]. There have been no precedents for monometallic indium hydrides having practical reactivity, while activated hydrides such as an ate complex LiPhn InH4-n (n = 0- 2) and phosphine-coordinated indium hydrides readily reduce carbonyl compounds. In view of this background, we focused on the development of dichloroindium hydrides (Cl2InH) as novel reducing agents that bear characteristic features in both ionic and radical reactions.

关键词：硼氢化物氧化铝活性复合物离子反应

Walking-friendly built environments and objectively measured physical function in older adults

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Journal of Sport and Health Science 2020年第6期9卷 651-656页

作者： Mohammad Javad Koohsari Gavin R.McCormack Tomoki nakaya Ai shibata Kaori Ishii Akitomo Yasunaga Yung Liao Koichiro Oka Faculty of Sport Sciences Waseda UniversityTokorozawa 359-1192Japan Behavioural Epidemiology Laboratory Baker Heart and Diabetes InstituteMelbourneVIC 3004Australia Melbourne School of Population and Global Health The University of MelbourneMelbourneVIC 3010Australia Department of Community Health Sciences Cumming School of MedicineUniversity of CalgaryCalgaryAlberta T2N 4Z6Canada Faculty of Kinesiology University of CalgaryCalgaryAlberta T2N 4Z6Canada School of Architecture Planning and LandscapeUniversity of CalgaryCalgaryAlberta T2N 4Z6Canada Graduate School of Environmental Studies Tohoku UniversitySendai 980-0845Japan Faculty of Health and Sport Sciences University of TsukubaTsukuba 305-8574Japan Faculty of Liberal Arts and Sciences Bunka Gakuen UniversityTokyo 151-8523Japan

Background:Few studies have examined the associations between urban design attributes and older adults’physical function.Especially,it is not well known how built-environment attributes may influence physical function in Asian cities.The aim of this study was to examine associations between objectively measured environmental attributes of walkability and objectively assessed physical function in a sample of Japanese older adults.Methods:Cross-sectional data collected in 2013 from 314 older residents(aged 65-84 years)living in Japan were used.Physical function was estimated from objectively measured upper-and lower-body function,mobility,and balance by a trained research team member.A comprehensive list of built-environment attributes,including population density,availability of destinations,intersection density,and distance to the nearest public transport station,were objectively calculated.Walk Score as a composite measure of neighborhood walkability was also obtained.Results:Among men,higher population density,availability of destinations,and intersection density were significantly associated with better physical function performance(1-legged stance with eyes open).Higher Walk Score was also marginally associated with better physical function performance(1-legged stance with eyes open).none of the environmental attributes were associated with physical function in elderly women.Conclusion:Our findings indicate that environmental attributes of walkability are associated with the physical function of elderly men in the context of Asia.Walking-friendly neighborhoods can not only promote older adults’active behaviors but can also support their physical function.

关键词： Elderly Functional test neighborhood Urban design Walkability

Low skeletal muscle mass and high visceral adiposity are associated with recurrence of acute cholecystitis after conservative management:A propensity score-matched cohort study

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Hepatobiliary & Pancreatic Diseases International 2024年第1期23卷 64-70页

作者： Yudai Koya Michihiko shibata Yuki Maruno Yoshitaka Sakamoto Shinji Oe Koichiro Miyagawa Yuichi Honma Masaru Harada Department of Gastroenterology Kyushu Rosai HospitalMoji Medical Center3-1 HigashiminatomachiMoji-kuKitakyushu 801-8502Japan Third Department of Internal Medicine School of MedicineUniversity of Occupational and Environmental HealthKitakyushu 807-8555Japan Department of Surgery Kyushu Rosai Hospital Moji Medical CenterKitakyushu 801-8502Japan

Background:Recurrent acute cholecystitis(RAC)can occur after non-surgical treatment for acute cholecystitis(AC),and can be more severe in comparison to the first episode of AC.Low skeletal muscle mass or adiposity have various effects in several diseases.We aimed to clarify the relationship between RAC and body parameters.Methods:Patients with AC who were treated at our hospital between January 2011 and March 2022 were enrolled.The psoas muscle mass and adipose tissue area at the third lumbar level were measured using computed tomography at the first episode of AC.The areas were divided by height to obtain the psoas muscle mass index(PMI)and subcutaneous/visceral adipose tissue index(SATI/VATI).According to median VATI,SATI and PMI values by sex,patients were divided into the high and low PMI groups.We performed propensity score matching to eliminate the baseline differences between the high PMI and low PMI groups and analyzed the cumulative incidence and predictors of RAC.Results:The entire cohort was divided into the high PMI(n=81)and low PMI(n=80)groups.In the propensity score-matched cohort there were 57 patients in each group.In Kaplan-Meier analysis,the low PMI group and the high VATI group had a significantly higher cumulative incidence of RAC than their counterparts(log-rank P=0.001 and 0.015,respectively).In a multivariate Cox regression analysis,the hazard ratios of low PMI and low VATI for RAC were 5.250(95%confidence interval 1.083-25.450,P=0.039)and 0.158(95%confidence interval:0.026-0.937,P=0.042),respectively.Conclusions:Low skeletal muscle mass and high visceral adiposity were independent risk factors for RAC.

关键词： Acute cholecystitis Low skeletal muscle mass Recurrent acute cholecystitis Sarcopenia Visceral adiposity

Lactobacillus pentosus S-PT84 and Rubus suavissimus leaf extract suppress lipopolysaccharide-induced gut permeability and egg allergen uptake

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食物生产加工与营养(英文)

食物生产加工与营养(英文) 2020年第1期2卷 33-40页

作者： Hiroaki Kanouchi Kaustav Majumder Hiroshi shibata Yoshinori Mine Department of Food Science University of GuelphGuelphOntario N1G 2W1Canada Present Address:Department of Clinical nutrition Osaka Prefecture University3-7-30Habikino-cityOsaka 583-8555Japan Present Address:Food Science and Technology Department University of NebraskaLincolnNE 68528USA Institute for Health Care Science Suntory Wellness Limited8-1-1 SeikadaiSeika-choSoraku-gunKyoto 619-0284Japan

Increased gut permeability facilitates the uptake of food allergens into the bloodstream and triggers allergenic reactions.The present study aimed to evaluate the effect of Lactobacillus pentosus S-PT84(S-PT84)and Rubus suavissimus leaf extract(RSLE)against egg ovomucoid(OVM)-uptake in lipopolysaccharide(LPS)-induced increased gut-permeability mice model of food allergy.Six-eight weeks old,female C57BL6 mice were continuously fed with LPS(300μg/kg BW),for 3 months to increase gut permeability.Reduction in the expression of sealing claudin-4,increase in the expression of pore-forming claudin-2,and increase in D-mannitol absorption into the blood plasma in the LPS treated groups suggested the increase in gut permeability after LPS treatment.The oral administration of major egg allergen,OVM,after LPS intervention,significantly increased the plasma mast cell protease-1 and OVMspecific IgE compared to the negative control group.These results indicated that continuous LPS intervention developed OVM-induced food allergy.However,both the treatment of S-PT84 and RSLE suppressed the claudin-2 expression and the gut permeability induced by LPS.Furthermore,S-PT84 and RSLE treatment also reduced the plasma mast cell protease-1 and OVM-specific IgE,indicating the potential beneficial effect against LPS intervention developed OVM-induced food allergy.These findings suggest that S-PT84 and RSLE ameliorated LPS induced gut permeability and food allergic reactions.

关键词： Gastro-intestinal tract Gut-permeability Food allergy Tight junction Claudin-2 Lipopolysaccharide Ovomucoid Rubus suavissimus Lactobacillus pentosus

Effect of chlorine dioxide on avian influenza A(H7n9)virus

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Biosafety and Health 2022年第1期4卷 53-57页

作者： Zhiping Sun Yun Qian norio Ogata Xia Cai Wendong Han Youhua Xie Hirofumi Morino Koushirou Sogawa Takashi shibata Di Qu BSL-3 Laboratory of Fudan University School of Basic Medical SciencesShanghai Medical CollegeFudan UniversityShanghai 200032China R&D Center Taiko Pharmaceutical Co.LtdKyotoJapan Key Laboratory of Medical Molecular Virology(MOE/nHC/CAMS) Department of Medical Microbiology and ParasitologySchool of Basic Medical SciencesShanghai Medical CollegeFudan UniversityShanghai 200032China

Avian influenza remains a threat to human wellbeing.Hypochlorite derivatives are commonly used as disinfectants to prevent the spread of the disease.The World Health Organization(WHO)has listed chlorine dioxide(ClO_(2))as an A1‐level,safe,and efficient disinfectant.In this study,we tested the efficacy of ClO_(2),in aqueous solution and gas forms,against avian influenza A(H7n9)virus.The virus suspension was mixed with ClO_(2) aqueous solutions of various concentrations and for various time intervals.Aliquots of the mixture were then serially diluted,and the 50%tissue culture infective dose(TCID50)was measured with a hemagglutination test on MDCK cells.ClO_(2) gas produced from generators was introduced in a chamber containing the virus suspension in a Petri dish.The infective activity of the surviving virus was measured by the hemagglutination test.An aqueous solution of ClO_(2) at 126μg/mL for 15 s was effective given that no surviving virus was detected with the hemagglutination test.ClO_(2) gas at>5μL/L sustained for 1 h inactivated the virus effectively,while at 2.5μL/L for 1 h,it only partially inactivated the virus.ClO_(2) as gas or aqueous solution at a certain concentration is effective in inactivating the H7n9 virus,and can be applied for the decontamination and disinfection of environments.

关键词： Chlorine dioxide Influenza virus A H7n9 Disinfection Aqueous solution Gas ClO_(2)

Photon Activation Analysis Using KUR-Linac

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Photon Activation Analysis Using KUR-Linac