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Reduction behaviors of permanganate by microbial cells and concomitant accumulation of divalent cations of Mg2+, Zn2+, and Co2+

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Journal of Environmental Sciences 2019年第12期31卷 78-86页

作者： Tomoaki kato Qianqian Yu Kazuya Tanaka Naofumi Kozai Takumi Saito Toshihiko Ohnuki School of Environment and Society Tokyo Institute of Technology2-12-1 OofcayamaMeguro-fcuTokyo 152-8550Japan School of Earth Science China University of GeosciencesWuhan 430074China Advanced Science Research Center Japan Atomic Energy AgencyTokaiIbaraki 319-1195Japan Institute of Innovative Research Tokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo 152-8550Japan The University of Tokyo 7-3-1 HongoBunkyo-kuTokyo 113-8654Japan

Permanganate treatment is widely used for disinfection of bacteria in surface-contaminated *** this paper,the fate of the dissolved permanganate in aqueous solution after contact with cells of Pseudomonas fluorescens was *** accumulation of divalent cations of Mg2+,Zn2+,and Co2+during precipitation of Mn oxides was also *** time course of the Mn concentration in solution showed an abrupt decrease after contact of Mn(VII)with microbial cells,followed by an increase after^24 *** analysis of the precipitated Mn oxides,called biomass Mn oxides,showed the formation of low-crystalline *** spectroscopy and X-ray absorption near edge structure(XANES)analyses indicated that dissolved Mn(VII)was reduced to form biomass Mn oxides involving Mn(IV)and Mn(III),followed by reduction to soluble Mn(II).The numbers of electron transferred from microbial cells to permanganate and to biomass Mn oxides for 24 hr after the contact indicated that the numbers of electron transfer from microbial cell was approximately 50 times higher to dissolved permanganate than to the biomass Mn oxides in present experimental *** 24 hr accumulation of divalent cations during formation of biomass Mn oxides was in the order of Co2+>Zn2+>Mg2+.XANES analysis of Co showed that oxidation of Co2+to Co3+resulted in higher accumulation of Co than Zn and ***,treatment of surface water by KMnO4 solution is effective not only for disinfection of microorganisms,but also for the elimination of metal cations from surface water.

关键词： Permanganate Cobalt Zinc Biomass Mn oxides Birnessite XANES

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Excitation and decay dynamics of 1s2s inner-shell double-vacancy states of neon atoms

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Chinese Physics B 2008年第2期17卷 592-598页

作者：丁晓彬董晨钟 Fumihiro Koike Takako kato Stephan Fritzsche College of Physics and Electronic Engineering Northwest Normal University Center of Theoretical Nuclear Physics National laboratory of Heavy-Ion Accelerator of Lanzhou Physics Department School of MedicineKitasato University1-15-1 Kitasato228-8555Japan National Institute for Fusion Science Department of Physics University of KasselHeinrich-Plett-Straβe 40D-34132KasselGermany

The photo-excitation and Auger decay processes of inner-shell double vacancy states 1s2s2p^6（1,3^S）3s3p of neutral neon atoms have been studied theoretically. Multi-configuration Dirac-Fock （MCDF） calculations have been carried out, with electron correlation effects taken into consideration. The relaxation of core and excited orbitals and configuration interaction are found to be crucial to creating the double vacancy states by single photo-absorption. The predominant decay paths for the double vacancy states turn out to be of the LLM Auger decay to 1s 2s^22p^53s（3p）, KLL Auger decay to 1s^22s2p^43s3p, and KLM Auger decay to 1s^22p^63s（3p）. They lead to further Auger decay, creating the neon ions of multiple charge states. For both double and single vacancy states the spectator type of Auger process is dominated in all the Auger decay processes. Theoretical Anger electron spectra are presented for further investigations, experimental and theoretical.

关键词： correlation effects multi-configuration Dirac-Fock (MCDF) method Auger decay

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Erythropoietin ameliorates early ischemia-reperfusion injury following the Pringle maneuver

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World Journal of Gastroenterology 2010年第38期16卷 4838-4845页

作者： Masato kato Tokihiko Sawada Junji Kita Mitsugi Shimoda Keiichi Kubota Second Department of Surgery Dokkyo Medical UniversityKitakobayash 880

AIM:To investigate the protective effect of erythropoietin (Epo) against ischemia-reperfusion injury (IR/I) following the Pringle maneuver (PM),in comparison with conventional steroid administration in a prospective randomized trial. METHODS:Patients were randomized by age, sex, diagnosis, and surgical method, and assigned to three groups:(1) A steroid group (STRD, n= 9) who received 100 mg of hydrocortisone before PM, and on postoperative days 1, 2 and 3, followed by tapering until postoperative day 7; (2) An EPO1 group (n=10) who received 30 000 U of Epo before the PM and at the end of surgery; and (3) An EPO2 group (n=8) who received 60 000 U of Epo before the PM. Hemoglobin (Hb), hematocrit (Ht), aspartate aminotransferase (AST), alanine transaminase (ALT),lactate dehydrogenase (LDH), lactate, interleukin-6 (IL-6),and tumor necrosis factor(TNF)-α were measured before and just after (Day 0) surgery, and on postoperative days 1, 3, 7 and 14. RESULTS: There were no increases in Hb and Ht in the EPO1 and EPO2 groups. AST was signif icantly lower in EPO1 than in STRD on Day 0 (P=0.041), and lower in EPO1 than in STRD and EPO2 on Day 1 (P=0.018). ALT was signif icantly lower in EPO1 than in STRD and EPO2 on Day 0 (P=0.020) and Day 1 (P=0.004). There were no signif icant inter-group differences in the levels of LDH and lactate. IL-6 was signif icantly lower in EPO1 than in STRD and EPO2 on Day 0 (P=0.0036) and Day 1 (P=0.0451). TNF-α was signif icantly lower in EPO1 than in STRD and EPO2 on Day 0 (P=0.0006) and Day 1 (P<0.0001). Furthermore, hospitalization was signif icantly shorter in EPO1 and EPO2 than in ***:Epo has greater potential than steroids to ameliorate IR/I after the PM. Epo at a dose of 30000 U, administered before PM and just after surgery, yields better results.

关键词： Erythropoietin Hepatic resection Pringle maneuver Steroid Prospective randomized study

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Photoluminescence, scintillation and thermally-stimulated luminescence properties of Tb-doped 12CaO·7Al2O3 single crystals grown by FZ method

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Journal of Rare Earths 2017年第10期35卷 957-963页

作者： Narumi Kumamoto Daisuke Nakauchi Takumi kato Go Okada Noriaki Kawaguchi Takayuki Yanagida Graduate School of Materials Science Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho Ikoma-shi Nara 630-0192 Japan

Tb-doped 12CaO·7Al_2O_3（Tb：C12A7） crystals were synthesized by the floating zone（FZ） method and the photoluminescence（PL）, scintillation and thermally-stimulated luminescence（TSL） properties were investigated. The photoluminescence（PL） emission spectra and PL decay time profiles were investigated by using Quantaurus-tau（Hamamatsu）. The scintillation spectra and decay time profiles were measured by using our laboratory-constructed set-up under X-ray irradiation. Finally, TSL glow curve was measured by using Nanogray TL-2000 with the heating rate of 1 °C/s. In PL and scintillation, emission peaks were observed at 493, 543, 587 and 620 nm due to the 4f-4f transitions of Tb3~＋. Decay time constants of the emission by PL and scintillation appeared to be different, and the measured values were approximately 2.4 and 1.9 ms, respectively. After X-ray irradiations, the 0.5%（all Tb contents in this paper are in mole fraction） and 1.0% Tb-doped samples showed a single intense and broad glow peak around 100 oC while 1.2%–1.5% Tb-doped samples showed notable additional peak around 250 oC.

关键词： C12A7 single crystal FZ terbium scintillation photoluminescence TSL rare earths

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Pneumococcal infection transmission between family members with congenital asplenia: A case report

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World Journal of Clinical Cases 2019年第24期7卷 4277-4284页

作者： Jumpei Shibata Kazuhiro Hiramatsu Tuneaki Kenzaka Takehito kato Department of General Surgery Toyohashi Municipal Hospital50 Aza Hachiken NishiAotake-ChoAichi 4418570ToyohashiJapan Division of Community Medicine and Career Development Kobe University Graduate School of MedicineHyogo 6520032KobeJapan

BACKGROUND Asplenia,the lack of a spleen,can be congenital and increases susceptibility to severe infections caused by encapsulated bacteria,such as Streptococcus pneumoniae(***).We report two cases of severe pneumococcal infection in two asplenic family members living in the same *** SUMMARY Patient 1,a 38-year-old man with a history of congenital hepatitis B infection and hypospadias,was brought to our emergency department with complaints of cyanosis,cough,and edema of his *** was clinically diagnosed as hyposplenic with overwhelming pneumococcal *** was admitted to the intensive care unit and was administered antibiotics and catecholaminergic therapy but died 2 h after *** 2,a 63-year-old woman with a history of type 2 diabetes,was brought to our emergency department one month after admission of Patient *** was diagnosed as asplenic with overwhelming pneumococcal ***-taking revealed that she was the mother of Patient 1 and the two had lived in the same *** was admitted to the intensive care unit and was rapidly provided antibiotics and catecholaminergic intervention but died one day after *** Pneumococcal bacteremia caused by virulent *** may be transmitted within *** residents of households where individuals with pneumococcal bacteremia are living should be educated about the risk of *** members of patients with congenital asplenia/hyposplenia,all family members should be examined to assess their splenic function.

关键词： Streptococcus pneumoniae Pneumococcal infection Asplenia Hyposplenia Isolated congenital asplenia Septic shock Case report

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Influence of contamination on banded iron formations in the Isua supracrustal belt, West Greenland: Reevaluation of the Eoarchean seawater compositions

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Geoscience Frontiers 2018年第4期9卷 1049-1072页

作者： Shogo Aoki Chiho Kabashima Yasuhiro kato Takafumi Hirata Tsuyoshi Komiya Department of Earth Science and Astronomy The University of Tokyo Frontier Research Center for Energy and Resources School of EngineeringThe University of Tokyo Department of Systems Innovation School of EngineeringThe University of Tokyo Ocean Resources Research Center for Next Generation Chiba Institute of Technology Research and Development Center for Submarine Resources Japan Agency for Marine-Earth Science and Technology(JAMSTEC) Division of Earth and Planetary Sciences Kyoto University

Banded Iron Formations（BIFs） are chemical sediments, ubiquitously distributed in the Precambrian supracrustal belts; thus their trace element compositions are helpful for deciphering geochemical evolution on the Earth through time. However, it is necessary to elucidate factors controlling the whole-rock compositions in order to decode the ancient seawater compositions because their compositions are highly variable. We analyzed major and trace element contents of the BIFs in the 3.8-3.7 Ga Isua supracrustal belt（ISB）, southern West Greenland. The BIFs are petrographically classified into four types：Black-,Gray-, Green-and White-types, respectively. The Green-type BIFs contain more amphiboles, and are significantly enriched in Co, Ni, Cu, Zn, Y, heavy rare earth element（HREE） and U contents. However,their bulk compositions are not suitable for estimate of seawater composition because the enrichment was caused by secondary mobility of metamorphic Mg, Ca and Si-rich fluid, involvement of carbonate minerals and silicate minerals of olivine and pyroxene and/or later silicification or contamination of volcanic and clastic materials. The White-type BIFs are predominant in quartz, and have lower transition element and REE contents. The Gray-type BIFs contain both quartz and magnetite. The Black-type BIFs are dominated by magnetite, and contain moderate to high transition element and REE contents. But,positive correlations of V, Ni, Zn and U contents with Zr contents suggest that involvement of detrital,volcanic and exhalative materials influences on their contents. The evidence for significant influence of the materials on the transition element contents such as Ni in the BIFs indicates the transition element contents in the Archean ocean were much lower than previously estimated. We reconstructed secular variations of V,Co, Zn and U contents of BIFs through time, which show Ni and Co contents decreased whereas V, Zn and U contents increased through time. Especially, the Ni

关键词： Banded iron formations Eoarchean Isua supracrustal belt Bioessential elements Seawater compositions

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Biological removal of selenate in saline wastewater by activated sludge under alternating anoxic/oxic conditions

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Frontiers of Environmental Science & Engineering 2019年第5期13卷 39-49页

作者： Yuanyuan Zhang Masashi Kuroda Shunsuke Arai Fumitaka kato Daisuke Inoue Michihiko Ike Division of Sustainable Energy and Environmental Engineering Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan Nippon Steel&Sumitomo Metal Corporation 20-1 ShintomiFuttsuChiba 293-8511Japan

Selenium (Se)-containing industrial wastewater is often coupled with notable salinity. However, limited studies have examined biological treatment of Se-containing wastewater under high salinity conditions. In this study, a sequencing batch reactor (SBR) inoculated with activated sludge was applied to treat selenate in synthetic saline wastewater (3% w/v NaCl) supplemented with lactate as the carbon source. Start-up of the SBR was performed with addition of 1–5 mM of selenate under oxygen-limiting conditions, which succeeded in removing more than 99% of the soluble Se. Then, the treatment of 1 mM Se with cycle duration of 3 days was carried out under alternating anoxic/oxic conditions by adding aeration period after oxygen-limiting period. Although the SBR maintained soluble Se removal of above 97%, considerable amount of solid Se remained in the effluent as suspended solids and total Se removal fluctuated between about 40 and 80%. Surprisingly, the mass balance calculation found a considerable decrease of Se accumulated in the SBR when the aeration period was prolonged to 7 h, indicating very efficient Se biovolatilization. Furthermore, microbial community analysis suggested that various Se-reducing bacteria coordinately contributed to the removal of Se in the SBR and main contributors varied depending on the operational conditions. This study will offer implications for practical biological treatment of selenium in saline wastewater.

关键词： Activated sludge Selenate reduction Saline wastewater Sequencing batch reactor Alternating anoxic/oxic conditions Selenium biovolatilization

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Effect of physical aging and cyclic loading on power-law creep of high-entropy metallic glass

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Journal of Materials Science & Technology 2022年第20期115卷 1-9页

作者： Langting Zhang Yajuan Duan Eloi Pineda Hidemi kato Jean-Marc Pelletier Jichao Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de Catalunya-BarcelonaTechBarcelona 08019Spain Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Universitéde Lyon MATEISUMR CNRS5510Bat.B.PascalINSA-LyonVilleurbanne Cedex F-69621France Innovation Center NPU-ChongqingChongqing 401135China

The power-law relationship between creep rate decay and time is one of the intrinsic characteristics of metallic *** the current work,a La_(30)Ce_(30)Ni_(10)Al_(20)Co_(10) high-entropy metallic glass was selected as the model alloy to test the influences of physical aging and cyclic loading on the power-law creep mechanism,which was probed by the dynamic mechanical analysis in terms of the stochastic activation,and contiguous interplay and permeation of shear transformation *** is demonstrated that a notable discrepancy appears between thermal treatment and mechanical treatment on the power-law creep mechanism of this high-entropy metallic *** the one hand,physical aging below the glass transition temperature introduces the annihilation of potential shear transformation zones which contribute to *** the other hand,cyclic loading can tailor the“forward”jump operations competing with the“backward”ones of shear transformation zones by controlling the interval time(recovery time).The current research offers a new pathway towards understanding the creep mechanism of high-entropy metallic glasses.

关键词： High-entropy metallic glass Physical aging Cyclic loading Power-law creep Shear transformation zone

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Current status of diagnosis and therapy for intraductal papillary neoplasm of the bile duct

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World Journal of Gastroenterology 2021年第15期27卷 1569-1577页

作者： Yuji Sakai Masayuki Ohtsuka Harutoshi Sugiyama Rintaro Mikata Shin Yasui Izumi Ohno Yotaro Iino Jun kato Toshio Tsuyuguchi Naoya kato Department of Gastroenterology and Nephrology Graduate School of MedicineChiba UniversityChiba 260-8670Japan Department of General Surgery Graduate School of MedicineChiba UniversityChiba 260-8670Japan

Bile duct epithelial tumours showing papillary neoplasm in the bile duct lumen are present in the intrahepatic and extrahepatic bile *** images of these tumours are distinctive and diverse,including histological images with a low to high grade dysplasia,infiltrating and noninfiltrating characteristics,excessive mucus production,and similarity to intraductal papillary mucinous neoplasm(IPMN)of the *** World Health Organization Classification of Tumours of the Digestive System in 2010 named these features,intraductal papillary neoplasm of the bile duct(IPNB),as precancerous lesion of biliary *** is currently classified into type 1 that is similar to IPMN,and type 2 that is not similar to *** of IPNB spreads superficially,and diagnosis with cholangioscopy is considered mandatory to identify accurate localization and *** of IPNB is said to be better than normal bile duct cancer.

关键词： Intraductal papillary neoplasm of the bile duct Intraductal papillary mucinous neoplasm of the pancreas Peroral cholangioscopy Cholangioscopy

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How we use hepatic arterial infusion chemotherapy in the new era of systemic therapy?

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Hepatobiliary Surgery and Nutrition 2022年第5期11卷 775-778页

作者： Sadahisa Ogasawara Naoya Kanogawa Naoya kato Department of Gastroenterology Graduate School of MedicineChiba UniversityChibaJapan

The research article by Li et *** the clinical benefits of hepatic arterial infusion chemotherapy(HAIC)(also known as transarterial infusion chemotherapy)with FOLFOX compared with transarterial chemoembolization(TACE)and sorafenib in advanced hepatocellular carcinoma(HCC)patients(1).HAIC was still selected as a common treatment option for advanced HCC mostly in Asian countries even when multi-kinase inhibitors were established as the standard *** is believed that experts in Asia fully understand HAIC’s clinical benefit for advanced HCC due to HAIC was a traditional transarterial treatment method which had evolved in Asia and performed before multi-kinase inhibitor *** biggest reason HAIC had not become the global standard,even with the evidence of high-level efficacy,was the lack of well-designed clinical studies.

关键词： arterial chemotherapy treatment

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