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Abiotic degradation of four phthalic acid esters in aqueous phase under natural sunlight irradiation

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Journal of Environmental Sciences 2009年第3期21卷 285-290页

作者： Ruttapol Lertsirisopon Satoshi Soda kazunari Sei Michihiko Ike Division of Sustainable Energy and Environmental Engineering Graduate School of Engineering Osaka University 2-1 Yamada-okaSuita 565-0871 Osaka Japan

Abiotic degradability of four phthalic acid esters （PAEs） in the aquatic phase was evaluated over a wide pH range 5-9. The PAE solutions in glass test tubes were placed either in the dark and under the natural sunlight irradiation for evaluating the degradation rate via hydrolysis or photolysis plus hydrolysis, respectively, at ambient temperature for 140 d from autumn to winter in Osaka, Japan. The efficiency of abiotic degradation of the PAEs with relatively short alkyl chains, such as butylbenzyl phthalate （BBP） and di-nbutyl phthalate （DBP）, at neutral pH was significantly lower than that in the acidic or alkaline condition. Photolysis was considered to contribute mainly to the total abiotic degradation at all pH. Neither hydrolysis nor photolysis of di-ethylhexyl phthalate （DEHP） proceeded significantly at any pH, especially hydrolysis at neutral pH was negligible. On the other hand, the degradation rate of di- isononyl phthalate （DINP） catalyzed mainly by photolysis was much higher than those of the other PAEs, and was almost completely removed during the experimental period at pH 5 and 9. As a whole, according to the half-life （t1/2） obtained in the experiments, the abiotic degradability of the PAEs was in the sequence： DINP （32-140 d）〉 DBP （50-360 d）, BBP （58-480 d）〉 DEHP （390-1600 d） under sunlight irradiation （via photolysis plus hydrolysis）. Although the abiotic degradation rates for BBP, DBP, and DEHP are much lower than the biodegradation rates reported, the photolysis rate for DINP is comparable to its biodegradation rate in the acidic or alkaline condition.

关键词： phthalic acid esters abiotic degradation photolysis hydrolysis first-order kinetics

Synthesis and visible-light-induced sacrificial photocatalytic water oxidation of quinary oxynitride BaNb_(0.5)Ta_(0.5)O_2N crystals

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Journal of Energy Chemistry 2018年第5期27卷 1415-1421页

作者： Kenta Kawashima Mirabbos Hojamberdiev Kunio Yubuta kazunari Domen Katsuya Teshima Department of Chemistry The University of Texas at Austin Department of Materials Physics Nagoya University Institute for Materials Research Tohoku University Department of Chemical System Engineering School of Engineering The University of Tokyo Department of Environmental Science and Technology Faculty of Engineering Shinshu University Center for Energy and Environmental Science Shinshu University

Quinary oxynitride BaNb_0.5Ta_0.5O_2N crystals were fabricated through the partial nitridation and acidifica- tion of the KCI flux grown Ba_5Nb_2Ta_2O_15 crystals. The parameters of both the solute concentrations and cooling rates are optimized for the KCI flux growth of the larger Ba_5Nb_2Ta_2O_15 crystals with clearer crystal habits. Here, the optimal Ba_5Nb_2Ta_2O_15 crystals mainly have a hexagonal plate-like shape. After the par- tial nitridation and acidification, the porous BaNb_0.5Ta_0.5O_2N crystals maintained the crystal shape of the oxide precursor and had a single-crystalline nature. For the BasNb2Ta2015 crystals, the wavelength of the absorption edge was about 707 nm. Especially, the CoOx-Ioaded BaNb_0.5Ta_0.5O_2N photocatalyst demon- strated the comparatively high amount of O_2 gas （150.7 μmol） during the 5 h visible-light-induced sacri- ficial water oxidation half-reaction, which might be achieved due to the high crystallinity and visible-light absorotion property.

关键词： Substitution Flux method Perovskite Oxygen Photocatalyst Solar energy

Rupture of small cystic pancreatic neuroendocrine tumor with many microtumors

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World Journal of Gastroenterology 2017年第37期23卷 6911-6919页

作者： Ryota Sagami Hidefumi Nishikiori Shoichiro Ikuyama kazunari Murakami Department of Gas--troenterology Oita San-ai Medical Center Department of Internal Medicine and Clinical Investigation Oita San-ai Medical Center Department of Gastroenterology Faculty of Medicine Oita University

Pancreatic neuroendocrine tumors(p NETs) are particularly rare. The various forms of PNETs, such as cystic degeneration, make differentiation from other similar pancreatic lesions difficult. We can detect small lesions by endoscopic ultrasound(EUS) and obtain preoperative pathological diagnosis by EUS-guided fine needle aspiration(FNA). We describe, here, an interesting case of p NET in a 42-year-old woman with no family history. Computed tomography and magnetic resonance imaging revealed an 18 mm × 17 mm cystic lesion with a nodule in the pancreatic tail. Two microtumors about 7 mm in diameter in the pancreatic body detected only by EUS, cystic rim and nodules all showed similar enhancement on contrast-harmonic EUS. Preoperative EUS-FNA of the microtumor was performed, diagnosing multiple p NETs. Macroscopic examination of the resected pancreatic body and tail showed that the cystic lesion had morphologically changed to a 13-mm main nodule, and 11 new microtumors(diameter 1-3 mm). Microscopically, all microtumors represented p NETs. From the findings of a broken peripheral rim on the main lesion with fibrosis, rupture of the cystic p NET was suspected. Postoperatively, pituitary adenoma and parathyroid adenoma were detected. The final diagnosis was multiple grade 1 p NETs with multiple endocrine neoplasia type 1. To the best of our knowledge, no case of spontaneous rupture of a cystic p NET has previously been reported in the English literature. Therefore, this case of very rare p NET with various morphological changes is reported.

关键词： Rupture Cystic pancreatic neuroendocrinetumor MEN1 NET Microtumor

COVID-19 vaccination and liver disease

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World Journal of Gastroenterology 2022年第48期28卷 6791-6810页

作者： Sotaro Ozaka Takashi Kobayashi Kazuhiro Mizukami kazunari Murakami Department of Gastroenterology Faculty of MedicineOita UniversityYufu 879-5593OitaJapan Department of Infectious Disease Control Faculty of MedicineOita UniversityYufu 879-5593OitaJapan

Various vaccines against severe acute respiratory syndrome coronavirus 2 have been developed in response to the coronavirus disease 2019(COVID-19)global pandemic,several of which are highly effective in preventing COVID-19 in the general *** with chronic liver diseases(CLDs),particularly those with liver cirrhosis,are considered to be at a high risk for severe COVID-19 and *** the increased rates of disease severity and mortality in patients with liver disease,there is an urgent need to understand the efficacy of vaccination in this ***,the data regarding efficacy and safety of COVID-19 vaccination in patients with CLDs is ***,several organ-specific or systemic immune-mediated side effects following COVID-19 vaccination,including liver injury similar to autoimmune hepatitis,have been recently *** the number of cases of vaccine-related liver injury is increasing,its frequency,clinical course,and mechanism remain ***,we review the current findings on COVID-19 vaccination and liver disease,focusing on:(1)The impact of COVID-19 in patients with CLD;(2)The efficacy,safety,and risk-benefit profiles of COVID-19 vaccines in patients with CLD;and(3)Liver injury following COVID-19 vaccination.

关键词： COVID-19 vaccine Liver disease Side effect Liver injury Immune-related hepatitis Autoimmune hepatitis

Improvement of die life in high speed injection die casting

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China Foundry 2008年第4期5卷 280-285页

作者： Yasuhiro Arisuda Akihito Hasuno Junji Yoshida kazunari Tanii RYOBI Limited Nippon Kosyuha Steel Co. Ltd.

High-speed injection die casting is an efficient manufacturing technology for upgrading aluminum die-cast ***,deficiencies(such as die damage in early period)due to larger load on the molding die compared with conventional technology have brought new *** this study,the cause of damage generated in super high-speed injection was investigated by the combination of experimental observation of the dies and CAE simulation(*** temperature analysis,flow analysis and thermal stress analysis).The potential countermeasures to solve the above problems were also proposed.

关键词： CAE simulation die casting heat check thermal stress

Biodegradability of four phthalic acid esters under anaerobic condition assessed using natural sediment

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Journal of Environmental Sciences 2006年第4期18卷 793-796页

作者： Ruttapol Lertsirisopon Satoshi Soda kazunari Sei Michihiko Ike Masanori Fuj ita Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka Japan.

Biodegradability of di-n-butyl phthalate （DBP）, butylbenzyl phthalate （BBP）, di-ethylhexyl phthalate （DEHP）, and di-isononyl phthalate （DINP） under an anaerobic condition was evaluated using three natural sediment microcosms obtained from ponds in Osaka, which had not been significantly polluted by the chemicals. The degradabilities of the four phthalic acid esters（PAEs） were analyzed by a first-order kinetic model with a lag phase and ranked as DBP〉BBP〉〉DEHP〉DINP. The PAEs with shorter alkyl-chains, DBP and BBP, were degraded with quite short lag phases near to zero and short half-lives of a few days. The PAEs with longer alkyl-chains, DEHP and DINP, were degraded with lag phases of 5-30 d and the quite long half-lives of a couple of hundred days. Although no data was available on the anaerobic biodegradability of D1NP before this study, it was clarified that DINP can be degraded with slow degradation rates. The fact that all the three intact sediments were capable of biodegradation of the PAEs suggests that potential of anaerobic biodegradation of PAEs is widespread in the aquatic environment.

关键词： phthalic acid esters anaerobic biodegradation sediment first-order kinetics

Accelerated degradation of a variety of aromatic compounds by Spirodela polyrrhiza-bacterial associations and contribution of root exudates released from S. polyrrhiza

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Journal of Environmental Sciences 2010年第4期22卷 494-499页

作者： Hai Hoang Ning Yu Tadashi Toyama Daisuke Inoue kazunari Sei Michihiko Ike Division of Sustainable Energy and Environmental Engineering Osaka University Suita Osaka 565-0871 Japan Division of Applied Sciences Muroran Institute of Technology Muroran Hokkaido 050-8585 Japan

Removal experiments of phenol, aniline, 2,4-dichlorophenol, nonylphenol and bisphenol A （BPA） using Spirodela polyrrhiza- bacterial associations revealed that all compounds but BPA underwent accelerated removal. The mechanisms differed depending on the substrates. It was found that S. polyrrhiza has a great ability to release phenolic compound-rich root exudates, and the exudates seem to stimulate bacterial degradation of a variety of aromatic compounds.

关键词： accelerated biodegradation aromatic compounds rhizosphere root exudates Spirodela polyrrhiza

Disease trends after Helicobacter pylori eradication based on Japanese nationwide claims and the health check-up database

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World Journal of Gastroenterology 2023年第4期29卷 692-705页

作者： Kazuhiro Mizukami Kentaro Sugano Tomomi Takeshima kazunari Murakami Department of Gastroenterology Oita UniversityOita 8795593Japan Department of Medicine Jichi Medical UniversityTochigi 3290498Japan Milliman Inc. Tokyo 1020083Japan

BACKGROUND Helicobacter pylori(***)infection is a risk factor for many diseases,including peptic ulcer disease and gastric *** *** eradication therapy can prevent these diseases,potentially unfavorable effects of eradication therapy have also been reported in some diseases,such as gastroesophageal reflux disease(GERD),Barrett’s esophagus(BE),inflammatory bowel disease(IBD),allergic diseases,and metabolic ***,both positive and negative impacts should be considered when assessing the effects of *** eradication *** To compare the incidence of these diseases before and after *** eradication and to comprehensively assess its *** This retrospective cohort study used a Japanese nationwide health claims database(April 2009-March 2020),developed by the Japanese Ministry of Health,Labour and *** database contained almost all health insurance claims data issued in Japan,and specific health check-up data for individuals who took the *** statistics were used for the *** who received primary eradication therapy were defined as those prescribed medication for *** *** diagnoses,defined as incidence of upper gastrointestinal diseases and IBD,and prevalence of allergic diseases were compared before and after *** incidence and prevalence of each disease were also compared between the 3-year period before eradication(from the 4th to the 2nd year prior to the year of eradication)and the 3-year period after eradication(from the 1st to the 3rd year after the year of eradication)based on the age category and calendar year and *** in body mass index and proportion of patients with metabolic syndrome(MS)were examined before and after *** We identified 5219731 patients who received primary eradication *** 65-69 years age group had the greatest number of patients in both *** was no significant increase in the incidence

关键词： Administrative claims Healthcare Allergy Eradication therapy Gastroesophageal reflux disease Helicobacter pylori Inflammatory bowel disease

Bacterial community succession during the enrichment of chemolithoautotrophic arsenite oxidizing bacteria at high arsenic concentrations

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Journal of Environmental Sciences 2012年第12期24卷 2133-2140页

作者： Nguyen Ai Le Akiko Sato Daisuke Inoue kazunari Sei Satoshi Soda Michihiko Ike Division of Sustainable Energy and Environmental Engineering Osaka University2-1 YamadaokaSuitaOsaka 565-0871Japan Department of Health Science Kitasato University1-15-1 KitasatoSagamihara-MinamiKanagawa 252-0373Japan

To generate cost-effective technologies for the removal of arsenic from water, we developed an enrichment culture of chemolithoau- totrophic arsenite oxidizing bacteria （CAOs） that could effectively oxidize widely ranging concentrations of As（III） to As（V）. In addition, we attempted to elucidate the enrichment process and characterize the microbial composition of the enrichment culture. A CAOs enrichment culture capable of stably oxidizing As（III） to As（V） was successfully constructed through repeated batch cultivation for more than 700 days, during which time the initial As（iiI） concentrations were increased in a stepwise manner from 1 to 10-12 mmol/L. As（III） oxidation activity of the enrichment culture gradually improved, and 10-12 mmol/L As（III） was almost completely oxidized within four days. Terminal restriction fragment length polymorphism analysis showed that the dominant bacteria in the enrichment culture varied drastically during the enrichment process depending on the As（III） concentration. Isolation and characterization of bacteria in the enrichment culture revealed that the presence of multiple CAOs with various As（Ⅲ） oxidation abilities enabled the culture to adapt to a wide range of As（Ⅲ） concentrations. The CAOs enrichment culture constructed here may be useful for pretreatment of water from which arsenic is being removed.

关键词： arsenic bacterial community chemolithoautotrophic arsenite oxidizing bacteria enrichment terminal-restriction fragmentlength polymorphism