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Oxidation Potentials of flavonoids Determined by flow-through Column Electrolysis

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中国实验方剂学杂志 2002年第S1期8卷 -页

作者： kensuke Aai fumiyo Kusu

1　ＩｎｔｒｏｄｕｃｔｉｏｎＦｌａｖｏｎｏｉｄｓａｒｅｎａｔｕｒａｌｃｏｍｐｏｕｎｄｓ ,ｗｉｄｅｌｙｄｉｓｔｒｉｂｕｔｅｄｉｎｆｒｕｉｔｓ,ｖｅｇｅｔａｂｌｅｓ,ａｎｄｔｅａｓ.Ｔｈｅｒｅｉｓａｎｉｎｃｒｅａｓｉｎｇｉｎ...

1　ＩｎｔｒｏｄｕｃｔｉｏｎＦｌａｖｏｎｏｉｄｓａｒｅｎａｔｕｒａｌｃｏｍｐｏｕｎｄｓ ,ｗｉｄｅｌｙｄｉｓｔｒｉｂｕｔｅｄｉｎｆｒｕｉｔｓ,ｖｅｇｅｔａｂｌｅｓ,ａｎｄｔｅａｓ.Ｔｈｅｒｅｉｓａｎｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｉｎｔｈｅｓｅｃｏｍｐｏｕｎｄｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｂｒｏａｄｐｈａｒｍａｃｏｌｏｇｉｃａｌａｃｔｉｖｉｔｉｅｓ ,[1,2 ] ｅｓｐｅｃｉａｌｌｙｔｈｅｉｒａｎｔｉｏｘｉｄａｎｔａｃｔｉｖｉｔｙ .[3～ 5 ] Ａｓａｎｔｉｏｘｉｄａｎｔｓ ,ｆｌａｖｏｎｏｉｄｓｈａｖｅｔｈｅａｂｉｌｉｔｙｔｏｓｃａｖｅｎｇｅｆｒｅｅｒａｄｉｃａｌｓｂｙｐｒｏｔｅｉｎａｎｄｅｌｅｃｔｒｏｎｔｒａｎｓｆｅｒｐｒｏｃｅｓｓｅｓ.Ｏｎｔｈｅｏｔｈｅｒｈａｎｄ ,ａｓｍｅｔａｌｃｈｅｌａｔｉｎｇａｇｅｎｔｓ ,ｆｌａｖｏｎｏｉｄｓｃａｎｄｅｐｒｅｓｓｔｈｅｓｕｐｅｒｏｘｉｄｅｄｒｉｖｅｎＦｅｎｔｏｎｒｅａｃｔｉｏｎ .[6 ] Ｔｈｅｒｅａｒｅａｌｓｏｒｅｐｏｒｔｓｏｆｆｌａｖｏｎｏｉｄｓｉｎｈｉｂｉｔｉｎｇｔｈｅａｃｔｉｖｉｔｉｅｓｏｆａｎａｒｒａｙｏｆｅｎｚｙｍｅｓ.[1,7,...

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Lead-free Tin-Based Alloy Plating for Lead-free Soldering in Electronics

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Lead-Free Tin-Based Alloy Plating for Lead-Free Soldering in...

Mass Transport in the Electromagnetically Levitating Droplet Superimposed a Static Magnetic field for Measurement of Diffusion Coefficient Using Containerless Processing

2003年全国电子电镀学术研讨会

作者： Hidemi Nawafune kensuke Akamatsu faculty of Science and Engineering High Technology Research Center Konan University 8-9-1 Okamoto HigashinadaKobe 658-8501Japan

Pb-free soldering is an urgent matter in the electronics *** order to achieve Pb-fres soldering in electrical appliances,securing the bonding reliability in mounting electronic parts is indispensable,and the surface t...

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Importance of early diagnosis of pancreaticobiliary maljunction without biliary dilatation

The 7th China-Japan Workshop on Microgravity Sciences

作者： kensuke Higuchi Yuko Inatomi Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency 3-1-1 YoshinodaiSagamiharaKanagawa 229-8510Japan

＜正＞Diffusion coefficient of high temperature metallic melt is an important thermophysical property which is necessary to improve the processes of casting and ***,it is difficult to measure it in the ground because of the convection and the chemical reaction to the *** avoid these difficulties,Bossuyt et *** submitted diffusion experiment using

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World Journal of Gastroenterology 2012年第26期18卷 3409-3414页

作者： kensuke Takuma Terumi Kamisawa Taku Tabata Seiichi Hara Sawako Kuruma Yoshihiko Inaba Masanao Kurata Goro Honda Koji Tsuruta Shin-ichiro Horiguchi Yoshinori Igarashi Department of Internal Medicine Tokyo Metropolitan Komagome HospitalTokyo 113-8677Japan Department of Surgery Tokyo Metropolitan Komagome HospitalTokyo 113-8677Japan Departments of Pathology Tokyo Metropolitan Komagome HospitalTokyo 113-8677Japan Department of Gastroenterology and Hepatology Omori Medical CenterToho University School of MedicineTokyo 143-8541Japan

AIM:To clarify the strategy for early diagnosis of pancreaticobiliary maljunction(PBM) without biliary dilatation and to pathologically examine gallbladder before cancer ***:The anatomy of the union of the pancreatic and bile ducts was assessed by using endoscopic retrograde cholangiopancreatography(ERCP).Patients with a long common channel in which communication between the pancreatic and bile ducts was maintained even during sphincter contraction were diagnosed as having *** these,patients in which the maximal diameter of the bile duct was less than 10 mm were diagnosed with PBM without biliary *** process of diagnosing 54 patients with PBM without biliary dilatation was retrospectively *** analysis of resected gallbladder specimens from 8 patients with PBM without biliary dilatation or cancer was ***:Thirty-six PBM patients without biliary dilatation were diagnosed with gallbladder cancer after showing clinical symptoms such as abdominal or back pain(n = 16) or jaundice(n = 12).Radical surgery for gallbladder cancer was only possible in 11 patients(31%) and only 4 patients(11%) survived for 5 *** patients were suspected as having PBM without biliary dilatation from the finding of gallbladder wall thickening on ultrasound and the diagnosis was confirmed by ERCP and/or magnetic resonance cholangiopancreatography(MRCP).The median age of these 8 patients was younger by a decade than PBM patients with gallbladder *** 8 patients underwent prophylactic cholecystectomy and bile duct cancer has not *** thickness and mucosal height of the 8 resected gallbladders were significantly greater than controls,and hyperplastic changes,hypertrophic muscular layer,subserosal fibrosis,and adenomyomatosis were detected in 7(88%),5(63%),7(88%) and 5(63%) patients,***-67 labeling index was high and K-ras mutation was detected in 3 of 6 ***:To detect PBM without biliar

关键词：早期诊断胆管异常合流基因突变检测括约肌病理检查最大直径

通过水性还原法用NaBH_4制备纳米铜颗粒过程中反应参数对制备过程的影响(英文)

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Transactions of Nonferrous Metals Society of China 2012年第12期22卷 2991-2996页

作者：刘清明周德璧 Yu-ya YAMAMOTO kensuke KURUDA Masazumi OKIDO 中南大学化学化工学院长沙410083 Department of Materials Science Graduate School of Engineering Nagoya University

通过水溶液还原法制备纳米铜颗粒,研究了不同反应条件对制备纳米铜的影响。制备纳米铜的最优条件是:当溶液 pH为12、温度为 313K、1%的明胶作为分散剂时,将0.4mol/L NaBH4加入含有 1.2mol/L 氨水的0.2mol/L CuSO4溶液中。此外,进行了一... 详细信息

通过水溶液还原法制备纳米铜颗粒,研究了不同反应条件对制备纳米铜的影响。制备纳米铜的最优条件是:当溶液 pH为12、温度为 313K、1%的明胶作为分散剂时,将0.4mol/L NaBH4加入含有 1.2mol/L 氨水的0.2mol/L CuSO4溶液中。此外,进行了一系列实验来模拟反应进程。结果表明,氨水能改变反应进程。当溶液 pH为10时,氨水将Cu2+转化为铜氨络合物,然后被 NaBH4还原为铜颗粒。当溶液pH为12时,氨水将Cu2+转化为氢氧化铜,然后被 NaBH4还原为铜颗粒。

关键词：铜纳米颗粒 NaBH4 氢氧化铜 Cu(NH3)42+ 水溶液还原法前驱体反应进程

Is hepatic arterial infusion chemotherapy effective treatment for advanced hepatocellular carcinoma resistant to transarterial chemoembolization?

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World Journal of Gastroenterology 2012年第16期18卷 1933-1939页

作者： Hiroyuki Kirikoshi Masato Yoneda Hironori Mawatari Koji fujita Kento Imajo Shingo Kato Kaori Suzuki Noritoshi Kobayashi kensuke Kubota Shin Maeda Atsushi Nakajima Satoru Saito Gastroenterology Division Yokohama City University Graduate School of Medicine3-9 Fuku-uraKanazawakuYokohama 236-0004Japan

AIM:To evaluate the effectiveness of hepatic arterial infusion chemotherapy(HAIC) for advanced hepatocellular carcinoma(HCC) resistant to transarterial chemoembolization(TACE).METHODS:This study was conducted on 42 patients who received HAIC for advanced HCC between 2001and 2010 at our hospital.5-fluorouracil(5-fU) was administered continuously for 24 h from day 1 to day 5 every 2-4 wk via an injection ***-arterial cisplatin or subcutaneous interferon was administered in combination with the *** patients enrolled in this retrospective study were divided into two groups according to whether or not they fulfilled the criteria for resistance to TACE proposed by the Japan Society of Hepatology in 2010(written in Japanese);one group of patients who did not fulfill the criteria for TACE resistance(group A,n = 23),and another group who fulfilled the criteria for TACE resistance(group B,n = 19).We compared the outcomes in terms of the response and survival rates between the two ***:Both the response rate and tumor suppression rate following HAIC were significantly superior in group A than in group B(response rate:48% vs 16%,P = 0.028,tumor suppression rate:87% vs 53%,P = 0.014).furthermore,both the progression-free survival rate and survival time were significantly superior in group A than in group B(3-,6-,12-,and 24-mo = 83%,70%,29% and 20% vs 63%,42%,16% and 0%,respectively,P = 0.040,and 9.8 mo vs 6.2 mo,P = 0.040).A multivariate analysis(Cox proportional hazards regression model) showed that resistance to TACE was an independent predictor of poor survival(P = 0.007).CONCLUSION:HAIC administrating 5-fU was not effective against advanced HCC resistant to *** tools for treatment,i.e.,molecular-targeting agents may be considered for these cases.

关键词：肝动脉化学栓塞化疗肝癌晚期治疗灌注

流动柱电极电解法测定黄酮化合物的氧化电位(英文)

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流动柱电极电解法测定黄酮化合物的氧化电位(英文)

Thermoelectric Properties of Silver Antimonate with Mixed Valency of Antimony

作者：杨滨 kensuke Arai fumiyo Kusu School of Pharmacy Tokyo University of Pharmacy and Life Science 1432-1 HorinouchiHachiojiTokyo 192-0392Japan

The first oxidation potentials of a series of structurally related flavonoids,mostly having hydroxyl substituents, were investigated by employing cyclic voltammetry and flow-through column *** flow-through column packed with carbon fibers was useful for determining the half-wave potenital(E) of the flavonoids and the number of electrons(n-value) transferred in the oxidation *** potentials of the flavonoids were shown to be strongly dependent on their *** important determinants for the ease of oxidation are:1) ortho-trihydroxyl group(pyrogallol group);2) ortho-dihydroxyl group(catechol group);3) the presence of a 2,3-double bond in conjugation with 4-oxo and 3-hydroxyl groups;and 4)another addition of a resonance-effective *** relaton between the E values of the first oxidation step obtained from the hydrodynamic voltammograms and the antioxidant data(IC) in biological systems obtained from references was examined to determine whether the E value was an indicator of the biological *** was found that more negative E values of flavonoids were usually associated with decreasing IC *** findings suggest that the electrochemical properties of the flavonoids contribute to their antioxidant activity,and thus the E values of flavonoids can be used as indices of their antioxidant activities in biological systems.

关键词： flavonoids first Oxidation Potential Column Electrode Antioxidant Activity

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Journal of Materials Science and Chemical Engineering 2017年第1期5卷 121-128页

作者： kensuke Ozawa Hirofumi Kakemoto Hiroshi Irie Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Japan Clean Energy Research Center University of Yamanashi Yamanashi Japan

Silver (Ag) and silver antimonate (AgSbO3) composites with different amounts of Sb3+ were synthesized by normal sintering with the aim of realizing a thermoelectric material. The electrical conductivity (σ) increased in the sample containing larger amount of Sb3+, whereas Seebeck coefficient (S) decreased. Producing Sb3+ caused the generation of oxygen vacancies in the material, and thus the corresponding donor levels are created in the bandgap, providing more conduction electrons. The conductive Ag particles would contribute to the conduction path as bypasses for carrier transport. The thermal conductivity (κ) was slightly lower in the presence of Ag defects in AgSbO3.

关键词： Thermoelectric Material Silver Antimonate Seebeck Coefficient Electrical Conductivity Thermal Conductivity

Super-Resolution Imaging of Mammograms Based on the Super-Resolution Convolutional Neural Network

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Open Journal of Medical Imaging 2017年第4期7卷 180-195页

作者： kensuke Umehara Junko Ota Takayuki Ishida Department of Medical Physics and Engineering Graduate School of Medicine Osaka University Suita Japan

Purpose: To apply and evaluate a super-resolution scheme based on the super-resolution convolutional neural network (SRCNN) for enhancing image resolution in digital mammograms. Materials and Methods: A total of 711 mediolateral oblique (MLO) images including breast lesions were sampled from the Curated Breast Imaging Subset of the Digital Database for Screening Mammography (CBIS-DDSM). We first trained the super-resolution convolutional neural network (SRCNN), which is a deep-learning based super-resolution method. Using this trained SRCNN, high-resolution images were reconstructed from low-resolution images. We compared the image quality of the super-resolution method and that obtained using the linear interpolation methods (nearest neighbor and bilinear interpolations). To investigate the relationship between the image quality of the SRCNN-processed images and the clinical features of the mammographic lesions, we compared the image quality yielded by implementing the SRCNN, in terms of the breast density, the Breast Imaging-Reporting and Data System (BI-RADS) assessment, and the verified pathology information. for quantitative evaluation, peak signal-to-noise ratio (PSNR) and structural similarity (SSIM) were measured to assess the image restoration quality and the perceived image quality. Results: The super-resolution image quality yielded by the SRCNN was significantly higher than that obtained using linear interpolation methods (p p Conclusion: SRCNN can significantly outperform conventional interpolation methods for enhancing image resolution in digital mammography. SRCNN can significantly improve the image quality of magnified mammograms, especially in dense breasts, high-risk BI-RADS assessment groups, and pathology-verified malignant cases.

关键词： Super-Resolution Deep-Learning Artificial Intelligence Breast Imaging Reporting and Data System (BI-RADS) Mammography