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Resource Recovery of WC-Co Cermet using hydrothermal Oxidation Technique

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Resource Recovery of WC-Co Cermet using Hydrothermal Oxidati...

Aged Garlic Extract Reduces ROS Production and Cell Death Induced by 6-hydroxydopamine through Activation of the Nrf2-ARE Pathway in Sh-SY5Y Cells

The 3～〔rd〕International Conference on high-Performance Ceramics(CICC-3)（2）

作者： Fumihito Inagaki Ryo Sasai hideaki itoh Koji Watari EcoTopia Science Institute Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan EcoTopia Science Institute Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan EcoTopia Science Institute Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan Advanced Manufacturing Research Institute National Institute of Advanced Industrial Science and Technology 2266-98 AnagahoraShimoshidami Moriyama-ku Nagoya 463-8560 Japan

＜正＞ WC-Co cermet is widely used in industrial applications such as cutting tools, dies, wear parts and so on. It is of great importance to establish the recycling process for the precious metal resources contained in WC-Co cermet, because all these metals used in Japan are imported. In this paper we reported a hydrothermal oxidation technique using nitric acid for the reclamation of WC and Co. The WC-Co cermet specimens with various WC particle sizes and Co contents were hydrothermally treated in hNO3 aqueous solutions at temperatures of 110-200℃for durations of 6-240 h. The Co was preferentially leached out into the acidic solution, while the WC was oxidized to insoluble WO3 hydrate which was subsequently separated by filtration. The hydrothermal treatment parameters such as solvent concentrations, treatment temperatures, holding time were optimized in respect to different kinds of WC-Co cermets. A hydrothermal oxidation treatment in 3M hNO3 aqueous solution at 150℃for 24 h was capable of fully disintegrating the cermet chip composed of coarse WC grains of 1-5 μm in size with 20 wt% of Co as binder. While the more oxidation resistant specimen composed of fine WC grains of 0.5-1.0 urn in size with 13 wt% of Co, was completely disintegrated by a treatment in 7 M hNO3 aqueous solution at 170℃for 24 h. The filtered solid residues were composed of fine WO3.0.33h2O powder and a small amount of WO3. The recovered WO3.0.33h2O powder can be easily returned to the industrial process for the synthesis of WC powder so that the overall recycling cost can be possibly lowered.

关键词： WC-Co cermet Precious metal hydrothermal oxidation Material recycling

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Pharmacology & Pharmacy 2013年第1期4卷 31-40页

作者： Kohfuku Kohda hitomi Goda Kei itoh Keijiro Samejima Tomoko Fukuuchi Graduate School of Pharmaceutical Sciences Musashino University Tokyo Japan

Many degenerative or pathological processes, such as aging, cancer and coronary heart disease, are related to reactive oxygen species (ROS) and radical-mediated reactions. We examined the effectiveness of aged garlic extract (AGE), a garlic preparation rich in water-soluble cysteinyl moieties, for protection of cells from ROS produced by 6-hydroxy-dopamine (6-OhDA) using human neuroblastoma Sh-SY5Y cells. Concomitant treatment of cells with AGE (2 and 4 mg/ml) showed the dose-dependent protective effect on the cell death induced by 6-OhDA. In addition, the AGE treatment significantly suppressed the increase of ROS generation by 6-OhDA. Furthermore, the protective effect of AGE was accompanied by activation of the nuclear factor erythroid 2-related factor 2 (Nrf2)-antioxidant response element (ARE) pathway and the increase of mRNAs of heme oxygenase-1 and NAD(P)h quinone oxidoreductase 1. These two enzymes are important in the cellular antioxidant system. These results indicated that AGE protected cells from ROS damage by not only capturing ROS directly but also activating the cellular antioxidant system by stimulating antioxidant gene expression via the Nrf2-ARE pathway. The present study suggested that AGE may be useful for prevention and treatment of cell damage caused by ROS.

关键词： Aged Garlic Extract (AGE) 6-OhDA ROS Nrf2-ARE Pathway Sh-SY5Y Cells

Surgery for gastric cancer patients of age 85 and older: Multicenter survey

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World Journal of Gastroenterology 2017年第7期23卷 1215-1223页

作者： hirotaka Konishi Daisuke Ichikawa hiroshi itoh Kenichiro Fukuda Naoki Kakihara Manabu Takemura Kaori Okugawa Kiyoshi Uchiyama Masashi Nakata hiroshi Nishi Toshiyuki Kosuga Shuhei Komatsu Kazuma Okamoto Eigo Otsuji Division of Digestive Surgery Department of SurgeryKyoto Prefectural University of Medicine Department of Surgery North Medical CenterKyoto Prefectural University of Medicine Department of Surgery Saiseikai Shigaken Hospital Department of Surgery Japanese Red Cross Kyoto Daini Hospital Department of Surgery Osaka General Hospital of West Japan Railway Company Department of Surgery Omihachiman Community Medical Center Department of Surgery Kyoto Okamoto Memorial Hospital Department of Surgery Kyoto Yamashiro General Medical Center Department of Surgery Saiseikai Kyoto Hospital

To investigate the surgical therapies for gastric cancer (GC) patients of age 85 or older in a multicenter *** opportunities for elderly GC patients have expanded in conjunction with extended life expectancy. however, the number of cases encountered in a single institution is usually very small and surgical therapies for elderly GC patients have not yet been standardized completely. In the present study, a total of 134 GC patients of age 85 or older who underwent surgery in 9 related facilities were retrospectively investigated. The relationships between surgical therapies and clinicopathological or prognostic features were ***-nine of the patients (66%) presented with a comorbidity, and 26 (19% overall) presented with more than two comorbidities. Radical lymphadenectomy was performed in 59 patients (44%), and no patient received pre- or post-operative chemotherapy. Forty of the patients (30%) experienced perioperative complications, but no surgical or perioperative mortality occurred. Laparoscopic surgery was performed in only 12 of the patients (9.0%). Univariate and multivariate analyses of the 113 patients who underwent R0 or R1 resection identified the factors of pT3/4 and limited lymphadenectomy as predictive of worse prognosis (hR = 4.68, P = 0.02 and hR =2.19, P = 0.05, respectively). Non-cancer-specific death was more common in cStage I patients than in cStage II or III patients. Limited lymphadenectomy correlated with worse cancer-specific survival (P = 0.01), particularly in cStage II patients (P here were no relationships between limited lymphadenectomy and any comorbidities, except for cerebrovascular disease (P = 0.07).CONCLUSIONNon-cancer-specific death was not negligible, particularly in cStage I, and gastrectomy with radical lymphadenectomy appears to be an effective treatment for cStage II elderly GC patients.

关键词： Gastric cancer Elderly more than 85 Surgery Limited lymphadenectomy Multicenter survey

Effects of sawtooth heat pulses on edge flows and turbulence in a tokamak plasma

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Plasma Science and Technology 2023年第1期25卷 1-9页

作者：赵开君 Yoshihiko NAGAShIMA 郭志彬 Patrick h DIAMOND 董家齐严龙文 Kimitaka itoh Sanae-I itoh 李晓博李继全 Akihide FUJISAWA Shigeru INAGAKI 程钧许健强 Yusuke KOSUGA Makoto SASAKI 王正汹张怀强陈俞钱曹小岗余德良刘仪宋显明夏凡王硕 School of Nuclear Science and Engineer East China University of TechnologyNanchang 330013People's Republic of China Research Institute for Applied Mechanics Kyushu UniversityKasuga 816-8580Japan School of Physics Peking UniversityBeijing 100871People's Republic of China Center for Momentum Transport and Flow Organization University of California at San DiegoCalifornia 92093United States of America Southwestern Institute of Physics Chengdu 610041People's Republic of China Institute of Science and Technology Research Chubu UniversityAichi 487-8501Japan Research Center for Plasma Turbulence Kyushu UniversityKasuga 816-8580Japan National Institute for Fusion Science Toki 509-5292Japan Department of Innovative Energy Science and Engineering Graduate School of EngineeringChubu UniversityAichi 487-8501Japan Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China School of Physics and Optoelectronic Technology Dalian University of TechnologyDalian 116024People's Republic of China

Enhancements of edge zonal flows,radial electric fields,and turbulence are observed in electron cyclotron resonance heating-heated plasmas(Zhao et al 2013 *** 53083011).In this paper,the effects of sawtooth heat pulses on flows and turbulence are *** experiments are performed using multiple Langmuir probe arrays in the edge plasmas of the hL-2A *** edge zonal flows,radial electric fields,and turbulence are all enhanced by *** of the zonal flow and turbulence intensities is also *** delay time of the maximal intensity of the electric fields,zonal flows,and turbulence with respect to the sawtooth crashes is estimated as~1 ms and comparable to that of the sawtooth-triggered intermediate *** only the zonal flows but also the radial electric fields lag behind the ***,the intensities of both the zonal flows and electric fields nearly linearly increase/decrease with the increase/decrease of the turbulence intensity.A double-source predator-prey model analysis suggests that a relatively strong turbulence source may contribute to the dominant zonal flow formation during sawtooth cycles.

关键词： tokamak Langmuir probe arrays edge flows and turbulence sawtooth heat pulses

Spectroscopic Survey of hα Emission Line Stars Associated with Bright Rimmed Clouds

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International Journal of Astronomy and Astrophysics 2019年第2期9卷 154-171页

作者： Kensuke hosoya Yoichi itoh Yumiko Oasa Ranjan Gupta Asoke Kumar Sen Nishi-harima Astronomical Observatory Center for AstronomyUniversity of HyogoKobeJapan Faculty of Education Saitama UniversitySaitamaJapan Inter University Center for Astronomy and Astrophysics(IUCAA) PuneIndia Department of Physics Assam UniversitySilcharIndia

The results of a spectroscopic survey of hα emission line stars associated with fourteen bright rimmed clouds are presented. Slit-less optical spectroscopy was carried out with the Inter University Centre for Astronomy and Astrophysics (IUCAA) 2 m telescope and IUCAA Faint Object Spectrograph and Camera (IFOSC). hα emission line was detected from 173 objects. Among them 85 objects have a strong hα emission line with its equivalent width larger than 10 ?. Those are classical T Tauri stars. 52 objects have a weak hα emission line with its equivalent width less than 10 ? and do not show intrinsic near-infrared excess. Those are weak-line T Tauri stars. On the other hand, 36 objects have a weak hα emission line (?), although they show intrinsic near-infrared excess. Such objects are not common in low-mass star forming regions. Those are misfits of the general concept on formation process of a low-mass star, in which it evolves from a classical T Tauri star to a weak-line T Tauri star. Those might be weak-line T Tauri stars with a flared disk in which gas is heated by ultraviolet radiation from a nearby early-type star. Alternatively, we propose pre-transitional disk objects as their evolutional stage.

关键词： Star Formation Pre-Main Sequence Stars T Tauri Stars

Toroidal component of velocity for geodesic acoustic modes in the edge plasmas of the J-TEXT tokamak

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Plasma Science and Technology 2021年第10期23卷 112-119页

作者： Yaoyu Xie Kaijun Zhao Zhipeng Chen Jiaqi Dong Kimitaka itoh Zhongyong Chen Yuejiang Shi Yonghua Ding Jun Cheng Longwen Yan hai Liu Zhifeng Cheng Zhoujun Yang Nengchao Wang Lu Wang Jianqiang Xu Yunfeng Liang J-TEXT Team School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013People’s Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China Institute of Science and Technology Research Chubu UniversityKasuga 816-8580Japan Research Center for Plasma Turbulence Kyushu UniversityKyushu UniversityChubu UniversityAichi 487-8501Japan National Institute for Fusion Science Toki 509-5292Japan ENN Science and Technology Development Co. Ltdand Hebei Key Laboratory of Compact FusionLangfang 065001People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China

The toroidal component of the velocity for geodesic acoustic modes(GAMs)is first *** Langmuir probe arrays set up near the top tokamak of the J-TEXT were utilized for this study.A significant peak at the GAM frequency is observed in Mach number *** toroidal velocity for the GAMs is estimated as 10–100 ms-1 and increases with the poloidal *** ratio of toroidal component to the poloidal one of the velocity is mainly located in the interval between 0.3 and *** higher safety factors q,the ratio almost does not change with decreasing the safety factor,whereas it goes up sharply at low *** coherencies between poloidal electric fields and Mach number fluctuations in turbulence frequency bands are also evaluated,and are higher than those between radial electric fields and Mach number fluctuations.

关键词： zonal flow geodesic acoustic mode tokamak return flow Mach number

Acute hepatitis B of genotype h resulting in persistent infection

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World Journal of Gastroenterology 2014年第11期20卷 3044-3049页

作者： Norie Yamada Ryuta Shigefuku Ryuichi Sugiyama Minoru Kobayashi hiroki Ikeda hideaki Takahashi Chiaki Okuse Michihiro Suzuki Fumio itoh hiroshi Yotsuyanagi Kiyomi Yasuda Kyoji Moriya Kazuhiko Koike Takaji Wakita Takanobu Kato Department of Virology Ⅱ National Institute of Infectious DiseasesShinjyuku-KuTokyo 162-8640Japan Department of Internal Medicine Center for Liver DiseasesKiyokawa HospitalSuginamiTokyo 166-0004Japan Division of Gastroenterology and hepatology Department of Internal MedicineSt. Marianna University School of MedicineKanagawa 216-8511Japan Department of Infectious Diseases Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Department of Infection Control and Prevention Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan

A 47-year-old man presented with general fatigue and dark *** laboratory data showed increased levels of hepatic *** patient was positive for hepatitis B virus(hBV)markers and negative for antihuman immunodeficiency *** hBV-DNA titer was set to 7.7 log copies/*** patient was diagnosed with acute hepatitis *** hBV infection route was *** serum levels of hepatic transaminases decreased to normal ranges without any treatment,but the hBVDNA status was maintained for at least 26 mo,indicating the presence of persistent *** isolated hBV from the acute-phase serum and determined the genome sequence.A phylogenetic analysis revealed that the isolated hBV was genotype *** this patient,the elevated peak level of hBV-DNA and the risk alleles at human genome single nucleotide polymorphisms s3077and rs9277535 in the human leukocyte antigen-DP locus were considered to be risk factors for chronic *** case suggests that there is a risk of persistent infection by hBV genotype h following acute hepatitis;further cases of hBV genotype h infection must be identified and ***,the complete determination of the hBV genotype may be essential during routine clinical care of acute hepatitis B outpatients.

关键词： Acute hepatitis Chronic hepatitis Genotyping hepatitis B virus Single nucleotide polymorphisms

等离子喷涂WC-Co-Ni涂层的高频感应加热后处理

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中国表面工程 1999年第3期12卷 42-44页

作者： MatsubaraY TomiguchiA haraguchi h hayashi h itoh. 王华仁东方汽轮机厂表面工程研究所

表面工程研究所６１８２０１摘要：为了用高频感应加热后处理来改善大气等离子喷涂ＷＣ－Ｃｏ－Ｎｉ涂层的性能，使用的喷涂粉末是用Ｎｉ－Ｐ合金加入到ＷＣ－Ｃｏ粉末中的方法生产出来的ＷＣ－Ｃｏ－Ｎｉ复合粉末。对涂层施以感应加热... 详细信息

表面工程研究所６１８２０１摘要：为了用高频感应加热后处理来改善大气等离子喷涂ＷＣ－Ｃｏ－Ｎｉ涂层的性能，使用的喷涂粉末是用Ｎｉ－Ｐ合金加入到ＷＣ－Ｃｏ粉末中的方法生产出来的ＷＣ－Ｃｏ－Ｎｉ复合粉末。对涂层施以感应加热，可以使Ｎｉ－Ｐ合金与ＷＣ－Ｃｏ－Ｎｉ涂层产生熔合，并使其与钢基体产生高强度的冶金结合。该试验中的一个创新技术是；在处理中应用于涂层外表面的抗氧化软膏的使用，这就排除了必须在氢气气氛中进行的限制。对处理后的涂层性能测试了有关显微结构、硬度、附着强度、抗摩擦磨损性能和孔隙率等。关键词：等离子喷涂　高频感应加热　涂层性能学科码:１４０．５５９９;４６０．２５２５译自《Ｐｒｏｃ　ｏｆ　ｔｈｅ１５ｔｈＩＴＳＣ》９８．５．ｐ１４１５～１４１８收稿：１９９９－０１－０４译文１前言近年来，对高质量、耐磨喷涂层的需要日益增加；因此；高速氧燃气喷涂（ＨＶＯＦ）己经变得很普遍。此外，致密的ＷＣ－Ｃ。涂层也已用渗入Ｎｉ－Ｐ合金‘ｌ］或铜合金”、的办法进行了处理。由于用等离子喷涂方法获得ＷＣ－Ｃ。涂层的耐磨性能不如硬质合金；致使其应用受到了限制。其性能差的原因在于较高的孔隙率和颗粒之间较低的结合强度。大气等离子喷涂层的性...

关键词：等离子喷涂高频感应加热涂层性能

刚果红交联聚乙烯醇薄膜/K+交换玻璃光波导检测氯化氢气体

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分析化学 2008年第10期36卷 1435-1439页

作者：麦麦提依明·马合木提阿布力孜·伊米提肖开提·阿布力孜 itoh Kiminori 新疆大学化学化工学院 Graduate School of Environment & Information Sciences Yokohama National University

用环氧氯丙烷为交联剂合成了刚果红(CR)交联聚乙烯醇(PVA)CR-PVA敏感试剂。用匀胶机将其做成薄膜固定在钾离子交换玻璃光波导表面,研制出一种光波导氯化氢气体传感器。CR-PVA薄膜碱式结构的最大吸收波长在600nm以下,对波长为632.8nm的... 详细信息

用环氧氯丙烷为交联剂合成了刚果红(CR)交联聚乙烯醇(PVA)CR-PVA敏感试剂。用匀胶机将其做成薄膜固定在钾离子交换玻璃光波导表面,研制出一种光波导氯化氢气体传感器。CR-PVA薄膜碱式结构的最大吸收波长在600nm以下,对波长为632.8nm的激光吸收很弱;薄膜与酸性气体发生反应后强烈吸收波长在632.8nm附近的导波或消失波;检测输出光强度的变化,即能够测出酸性气体浓度。测试结果表明,本传感器对低浓度hCl气体有快速响应,且对1.6～192mg/m3范围内有良好的线性响应;SO2、NO2气体的浓度大于18000mg/m3时才有响应,而对于高、低浓度h2S气体均无响应。

关键词：刚果红聚乙烯醇光波导气体传感器氯化氢气体