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Flow fields control for bubble refinement induced by electromagnetic fields

Journal of Iron and Steel Research International 2022年第4期29卷 575-587页

作者： Lian-yu Wang Ze-yi Liu Ming He Xiao-ming Liu Masamichi sano Li-jia Zhao Qiang Wang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina

Large bubbles seriously reduce the efficiencies of the interactions between the bubbles and the molten steel,such as energy transfer,momentum transfer,mass transfer and chemical *** reduce the size of the bubbles and increase the gas–liquid interface area,a novel non-intrusive method of bubble refinement was proposed,which only depends on the molten steel flow field controlled by the rotating electromagnetic *** flow fields of the molten steel for bubble refinement were analyzed,and the corresponding bubble refinement was *** was found that the molten steel formed obvious rotating turbulent flow for bubble refinement under the unidirectional rotating electromagnetic ***,the large vortex in the center of the molten pool caused by the rotating flow made the bubbles aggregate and coalesce again,resulting in formation of larger bubbles and gas *** suppress the central vortex formation and enhance the bubble refinement,the forward-reverse rotating electromagnetic field for bubble refinement was *** irregular and chaotic flow occurred repeatedly because of alternating forward and reverse rotating in a short period,so that the turbulent kinetic energy and turbulent dissipation of the flow field always remained at a high level which favors bubble *** a result,the bubble diameter can decrease by more than 50%compared to that without electromagnetic ***,it is important that this non-intrusive kind of bubble refinement method completely avoids the introduction of non-metallic inclusions caused by intrusive configuration.

关键词： Bubble refinement Electromagnetic field Flow field Forward-reverse rotating Bubble Sauter

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Cold Model Study on Mg Desulfurization of Hot Metal Under Mechanical Stirring

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Journal of Iron and Steel Research International 2013年第12期20卷 1-6页

作者： LIU Yan ZHANG Zi-mu LIU Jian-nan ZHANG Jun-hua Masamichi sano ZHANG Jun Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education School of Materials and MetallurgyNortheastern University Beijing Institute of Technology Dalian University of Technology Nagoya University

The new method of in-situ desulfurization with mechanical stirring of new type impellers was introduced, in which the bubble＇s dispersion and disintegration of magnesium vapor were the key to boosting the desulfurization efficiency and increasing the utilization rate of magnesium. Effects of different new type of impellers on bubble dis persion and disintegration were studied through bubble image analysis, gas-liquid mass transfer, and power con- sumption levels of different impeller structures. The results showed that the sloped swept-back blade impeller-2 pro- duces optimal bubble＇s dispersion and disintegration, as well as higher volumetric mass transfer coefficient and CO2 gas utilization while consuming the least power. Numerical simulation result with Fluent software also showed that the sloped swept-back blade impeller-2 has higher turbulent kinetic energy and better velocity distribution than the other two impellers.

关键词： gas injection refining eccentric mechanical stirring bubble disintegration bubble dispersion volumetric mass transfer coefficient Mg desulfurization hot metal

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Degassing of deep-sourced CO_(2) from Xianshuihe-Anninghe fault zones in the eastern Tibetan Plateau

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Science China Earth Sciences 2022年第1期65卷 139-155页

作者： Sheng XU Lufeng GUAN Maoliang ZHANG Jun ZHONG Wei LIU Xian'gang XIE Congqiang LIU Naoto TAKAHATA Yuji sano Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China Atmosphere and Ocean Research Institute The University of TokyoKashiwaChiba 277-8564Japan

A large number of gases are releasing from the medium-high temperature geothermal fields distributed along the large-scale strike-slip fault zones in the southeastern margin of the Tibetan *** this study,11 hot spring water and the associated bubbling gas samples were collected along the Xianshuihe-Anninghe fault zones(XSH-ANHFZ)and analyzed for chemical and isotopic *** δ^(18)_(H_(2)O) and δD_(H_(2)O) values indicate that hot spring waters are predominantly meteoric origin recharged from different *** water samples are significantly enriched in Na^(+) and HCO_(3) due to the dissolution of regional evaporites,carbonates and Na-silicates.^(3)He/^(4)He ratios of the gas samples are 0.025-2.73 times the atmospheric *** ^(3)He/^(4)He ratios are high in the Kangding region where the dense faults are distributed,and gradually decrease with increasing distance from Kangding towards both sides along the Xianshuihe fault zones(XSHFZ).Hydrothermal fluids have dissolved inorganic carbon(DIC)concentrations from 2 to 42 mmol L^(-1),δ^(13)C_(DIC) from -6.9‰ to 1.3‰,δ^(13)C_(CO_(2)) from -7.2‰ to -3.6‰ and Δ^(14)C from -997‰ to -909‰.Combining regional geochemical and geological information,the CO_(2)sources can be attributed to deep-sourced CO_(2)from mantle and metamorphism of marine carbonate,and shallow-sourced CO_(2)from the dissolution of marine carbonate and biogenic CO_(2).The mass balance model shows that 11±6% of the DIC is sourced from the dissolution of shallow carbonate minerals,9±8% formed by pyrolysis of sedimentary organic matter,80±9% derived from deep metamorphic origin and mantle-derived CO_(2).Among them,the deep-sourced CO_(2)in Anninghe fault zones(ANHFZ)is merely metamorphic carbon,whereas ca.12% and ca.88% of the deep-sourced CO_(2)in the XSHFZ are derived from the mantle and metamorphic carbon,*** average deep-sourced CO_(2)flux in the Kangding geothermal field is estimated to be 160 ta^(-1).If all the hot

关键词： Hot spring Fluid geochemistry Deep-sourced carbon Xianshuihe-Anninghe fault zones Tibetan Plateau

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An Absolute Standardized Uptake Value Is More Useful than the Decreased Rate of Uptake of FDG-PET to Predict Responses to Neoadjuvant Chemoradiotherapy for Esophageal Cancer

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Open Journal of Gastroenterology 2016年第11期6卷 373-385页

作者： Masanobu Nakajima Hiroyuki Kato Tatsuya Miyazaki Takanori Inose Naritaka Tanaka Shigemasa Suzuki Takehiko Yokobori makoto Sakai Akihiko sano Keisuke Ieta makoto Sohda Minoru Fukuchi Hiroyuki Kuwano Department of Surgery I Dokkyo Medical University Mibu Japan Department of General Surgical Science Gunma University Graduate School of Medicine Maebashi Japan

Background: Neoadjuvant chemoradiotherapy (CRT) is frequently performed for esophageal squamous cell carcinoma. In this study, we retrospectively assessed the standardized uptake value (SUV) of FDG-PET against decreased rates of SUV to assess the response of advanced esophageal squamous cell carcinoma patients to neoadjuvant CRT, and the correlation of this response with histopathological findings. Patients and Methods: Thirty-three patients receiving CRT followed by surgery were analyzed. Results: Using the decreased rate of maximum SUV, the sensitivity and specificity in distinguishing complete responders (CR) from non-CR patients was 63% and 44%. Using the maximum SUV before surgery, the sensitivity and specificity for distinguishing pathological CR from non-CR was 88% and 56%. Conclusions: To identify complete responders of CRT for esophageal cancer, absolute maximum SUV value is a better predictor than decreased rate of the maximum SUV.

关键词： Esophageal Cancer Neoadjuvant Therapy Chemoradiotherapy FDG-PET SUV

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Polyarteritis nodosa diagnosed by surgically resected jejunal necrosis following acute abdomen

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World Journal of Gastroenterology 2013年第18期19卷 2830-2834页

作者： Yuta Hiraike makoto Kodaira Munetaka sano Yasuyuki Terazawa Shingo Yamagata Syuzo Terada Masaharu Ohura Ken Kuriki Department of Gastroenterology Yaizu City Hospital Yaizu City Shizuoka 425-8505 Japan Department of Nephrology Yaizu City Hospital Yaizu City Shizuoka 425-8505 Japan Department of Pathology Yaizu City Hospital Yaizu City Shizuoka 425-8505 Japan

The differential diagnosis of acute abdomen is typically extremely broad in range, with vasculitis posing a rare but potentially life-threatening cause of acute abdomen. Here, we report a case of acute abdomen with bowel wall thickening limited to jejunum, accompanied by unexplained renal dysfunction. Later, the patient was diagnosed as having polyarteritis nodosa based on surgically resected jejunal necrosis. Despite aggressive treatment, including the use of steroid pulse therapy and continuous hemodiafiltration, the patient died. Although polyarteritis nodosa is extremely rare in patients with acute abdomen, acute abdomen is relatively common manifestation of that. And it is reported that involvement of small intestine suggests poorer prognosis. Our case highlights the importance of vasculitis as a differential diagnosis of patients with atypical acute abdomen. In this report, we not only review possible clues that might have led to an earlier diagnosis in this case, but also attempt to draw some lessons for treating similar cases in the future.

关键词： Acute abdomen Polyarteritis nodosa Jejunal necrosis

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Inflammatory bowel disease of primary sclerosing cholangitis:A distinct entity?

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World Journal of Gastroenterology 2014年第12期20卷 3245-3254页

作者： Takahiro Nakazawa Itaru Naitoh Kazuki Hayashi Hitoshi sano Katsuyuki Miyabe Shuya Shimizu Takashi Joh Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical Sciences Department of Gastroenterology Gifu Prefectual Tajimi Hospital

This is a review of the characteristic findings of inflammatory bowel disease(IBD)associated with primary sclerosing cholangitis(PSC)and their usefulness in the diagnosis of sclerosing *** is a chronic inflammatory disease characterized by idiopathic fibrous obstruction and is frequently associated with *** with PSC(PSC-IBD)shows an increased incidence of pancolitis,mild symptoms,and colorectal *** an increased incidence of pancolitis is a characteristic finding,some cases are endoscopically diagnosed as right-sided ulcerative *** studies have revealed that inflammation occurs more frequently in the right colon than the left *** frequency of rectal sparing and backwash ileitis should be investigated in a future study based on the same *** cholangiographic findings of immunoglobulin G4-related sclerosing cholangitis(IgG4-SC)are similar to those of *** rare association between IBD and IgG4-SC and the unique characteristics of PSC-IBD are useful findings for distinguishing PSC from IgG4-SC.

关键词： Primary sclerosing cholangitis Primary sclerosing cholangitis Inflammatory bowel disease Inflammatory bowel disease-associated with primary sclerosing cholangitis Immunoglobulin G4-related sclerosing cholangitis

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Role of 18F-fluorodeoxyglucose positron emission tomography imaging in surgery for pancreatic cancer

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World Journal of Gastroenterology 2008年第1期14卷 64-69页

作者： Hisao Wakabayashi Yoshihiro Nishiyama Tsuyoshi Otani Takanori sano Shinichi Yachida Keiichi Okano Kunihiko Izuishi Yasuyuki Suzuki Department of Gastroenterological Surgery Kagawa University Kagawa 761-0793 Japan Department of Radiology Kagawa University Kagawa 761-0793 Japan

AIM： To evaluate the role of positron emission tomography using 18F-fluorodeoxyglucose （FDG-PET） in the surgical management of patients with pancreatic cancer, including the diagnosis, staging, and selection of patients for the subsequent surgical treatment. METHODS： This study involved 53 patients with proven primary pancreatic cancer. The sensitivity of diagnosing the primary cancer was examined for FDG-PET CT, cytological examination of the bile or pancreatic juice, and the serum levels of carcinoembrionic antigens （CEA） and carbohydrate antigen 19-9 （CA29-9）. Next, the accuracy of staging was compared between FDG-PET and CT. Finally, FDG-PET was analyzed semiquantitatively using the standard uptake value （SUV）. The impact of the SUV on patient management was evaluated by examining the correlations between the SUV and the histological findings of cancer. RESULTS： The sensitivity of FDG-PET, CT, cytological examination of the bile or pancreatic juice, and the serum levels of CEA and CA19-9 were 92.5%, 88.7%, 46.4%, 37.7% and 69.8%, respectively. In staging, FDG-PET was superior to CT only in diagnosing distant disease （bone metastasis）. For local staging, the sensitivity of CT was better than that of FDG-PEr. The SUV did not correlate with the pTNM stage, grades, invasions to the vessels and nerve, or with the size of the tumor. However, there was a statistically significant difference （4.6 ± 2.9 vs 7.8 ± 4.5, P = 0.024） in the SUV between patients with respectable and unresectable disease. CONCLUSION： FDG-PET is thus considered to be useful in the diagnosis of pancreatic cancer. However, regarding the staging of the disease, FDG-PET is not considered to be a sufficiently accurate diagnostic modality. Although the SUV does not correlate with the patho-histological prognostic factors, it may be useful in selecting patients who should undergo subsequent surgical treatment.

关键词： Pancreatic cancer Fluorodeoxyglucose positron emission tomography Computed tomography Standard uptake value Carcinoembrionic antigens Carbohydrate antigen 19-9 Prognostic factor

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Effective use of the Japan Narrow Band Imaging Expert Team classification based on diagnostic performance and confidence level

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World Journal of Clinical Cases 2019年第18期7卷 2658-2665页

作者： Daizen Hirata Hiroshi Kashida Mineo Iwatate Tomomasa Tochio Akira Teramoto Yasushi sano Masatoshi Kudo Gastrointestinal Center and Institute of Minimally-invasive Endoscopic Care Sano HospitalKobe 6550031Japan Department of Gastroenterology and Hepatology Kindai UniversityOsaka 5895811Japan

Five years have passed since the Japan Narrow Band Imaging Expert Team (JNET) classification was proposed in 2014. However, the diagnostic performance of this classification has not yet been established. We conducted a retrospective study and a systematic search of Medical Literature Analysis and Retrieval System On-Line. There were three retrospective single center studies about the diagnostic performance of this classification. In order to clarify this issue, we reviewed our study and three previous studies. This review revealed the diagnostic performance in regards to three important differentiations.(1) Neoplasia from non-neoplasia;(2) malignant neoplasia from benign neoplasia;and (3) deep submucosal invasive cancer (D-SMC) from other neoplasia. The sensitivity in differentiating neoplasia from non-neoplasia was 98.1%-99.8%. The specificity in differentiating malignant neoplasia from benign neoplasia was 84.7%-98.2% and the specificity in the differentiation D-SMC from other neoplasia was 99.8%-100.0%. This classification would enable endoscopists to identify almost all neoplasia, to appropriately determine whether to perform en bloc resection or not, and to avoid unnecessary surgery. This article is the first review about the diagnostic performance of the JNET classification. Previous reports about the diagnostic performance have all been retrospective single center studies. A large-scale prospective multicenter evaluation study is awaited for the validation.

关键词： Japan Narrow Band Imaging Expert Team Classification Magnifying endoscopy Narrow-band imaging Validation Diagnostic performance Colonoscopy Colorectal neoplasms

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Mice-lacking LMP2, immuno-proteasome subunit, as an animal model of spontaneous uterine leiomyosarcoma

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Protein & Cell 2010年第8期1卷 711-717页

作者： Takuma Hayashi Akiko Horiuchi Kenji sano Nobuyoshi Hiraoka Yae Kanai Tanri Shiozawa Susumu Tonegawa Ikuo Konishi Department of Immunology and Infectious Disease Shinshu University Graduate School of MedicineMatsumotoNagano 390-8621Japan Department of Obstetrics and Gynecology Shinshu University School of MedicineMatsumotoNagano 390-8621Japan Department of Laboratory Medicine Shinshu University HospitalMatsumotoNagano 390-8621Japan Pathology Division National Cancer Center Research InstituteTokyo 104-0045Japan Picower Institution and Department of Biology Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Department of Obstetrics and Gynecology Kyoto University Graduate School of MedicineSakyo-kuKyoto 606-8501Japan Promoting Business using Advanced Technology Japan Science and Technology Agency(JST)Kawaguchi-shiSaitama 332-0012Japan

Uterine tumors are the most common type of gynecologic *** leiomyosarcoma(LMS)is rare,accounting for 2%to 5%of tumors of the uterine *** LMS develops more often in the muscle tissue layer of the uterine body than in the uterine *** development of gynecologic tumors is often correlated with female hormone secretion;however,the development of uterine LMS is not substantially correlated with hormonal conditions,and the risk factors are not yet *** evaluation combined with PET/CT can be useless in the diagnosis and surveillance of uterine ***,a diagnostic biomarker,which distinguishes malignant LMS and benign tumor leiomyoma(LMA)is yet to be ***,it is necessary to analyze risk factors associated with uterine LMS in order to establish a method of ***2-deficient mice spontaneously develop uterine LMS,with a disease prevalence of~40%by 14 months of *** is therefore of interest whether human uterine LMS shows a loss of LMP2 *** found LMP2 expression is absent in human LMS,but present in human ***,defective LMP2 expression may be one of the risk factors for ***2 is potentially a diagnostic biomarker for uterine LMS,and gene therapy with LMP2-encording DNA may be a new therapeutic approach.

关键词： LMP2 uterine leiomyosarcoma uterine leiomyoma diagnostic biomarker

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A Kind of Sustainable Craft Making： Equal and Flexible Participation in Piecing Acehnese Hat

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Journal of Literature and Art Studies 2016年第9期6卷 1013-1026页

作者： Toshiyuki sano Nara Women's University Nara Japan

Terms of sustainable and sustainability have been employed in various sectors and fields since around 1990. To make a society sustainable needs to find ways of having sustainable local activities. The ways may be to find and revitalize local resources, or to support new life styles by accepting outsider＇s new ideas. I see those ways often taken from a perspective that the ways require a structure or institutional organization. To explore in-between ways, it would be better to have an alternative perspective and useful to learn from Southeast Asian cases of managing diversity while accepting new ways （cf. Reid, 2015）. In this essay, I focus on a sustainable craft making of a men＇s hat kopiah meuketob in Aceh, Sumatra, which is traditional item for marriage but has been used in various imaginative ways and has been shaping a regional ＂craft-scape.＂ I examine such ways and various facets of making the hat and conclude that a lesson from the case for making things sustainable is equal and flexible ways of participating in production processes.

关键词： Aceh Sumatra craft sustainability flexible participation women's work men's hat

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