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Fluorescent SiC and its application to white light-emitting diodes

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Journal of Semiconductors 2011年第1期32卷 24-26页

作者： Satoshi Kamiyama Motoaki Iwaya Tetsuya takeuchi Isamu Akasaki Mikael Syvjrvi Rositza Yakimova Department of Materials Science and Engineering Meijo University Department of Physics Chemistry and Biology Linkping University

Fluorescent-SiC （f-SiC）, which contains donor and acceptor impurities with optimum concentrations, has high conversion efficiency from NUV to visible light caused by donor-acceptor-pair （DAP） recombination. This material can be used as a substrate for a near UVlight-emitting diode （LED） stack, and leads to monolithic white LED device with suitable spectral property for general lighting applications. In this paper, we describe basic technologies of the white LED, such as optical properties of f-SiC substrate, and epitaxial growth of NUV stack on the f-SiC substrate.

关键词： white LED phosphor SiC donor-acceptor-pair GaN general lighting

Multiple　antibiotic-resistant　lactic　　acid　bacteria　preparation　eliminated　MRSAfrom　the　decubitus　of

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Chinese Medical Journal 1997年第2期110卷 157-159页

作者： Shigeru Kimura Yumiko takeuchi Hiroko Tago Shiehiko Mukai Haruki Kato Motoharu Kondo TheFirstDepartmentoflnternalMedicine KyotoPrefec-turalUniversityofMedicine

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Ｍｕｌｔｉｐｌｅａｎｔｉｂｉｏｔｉｃ－ｒｅｓｉｓｔａｎｔｌａｃｔｉｃａｃｉｄｂａｃｔｅｒｉａｐｒｅｐａｒａｔｉｏｎｅｌｉｍｉｎａｔｅｄＭＲＳＡｆｒｏｍｔｈｅｄｅｃｕｂｉｔｕｓｏｆａｂｅｄ－ｒｉｄｄｅｎｅｌｄｅｒｌｙｐａｔｉｅｎｔＳｈｉｇｅｒｕＫｉｍｕ...

关键词： acid bacteria Multiple MRSAfrom

Performance Improvements in Raman Distributed Temperature Sensor

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Photonic Sensors 2013年第4期3卷 314-319页

作者： Toru FUKUZAWA Hideo SHIDA Kazushi OISHI Nobuaki takeuchi Shoj i ADACHI Yokogawa Electric Corporation 2-9-32 Naka-cho Musashino-shL Tokyo 180-8750 Japan

The fiber optic distributed temperature sensor （DTS） is one of the most outstanding means to measure temperature distribution along an optical fiber. In this paper, we propose a novel calibration technique to measure the temperature highly accurately over a wide range of temperatures. We also propose an improved double-ended configuration that is insusceptible to the differential loss change in the fiber and suitable for the field use. Then, we developed an interrogator that had high robustness in harsh environments.

关键词： Raman scattering DTS distributed temperature sensor optical fiber sensor

Management of gastric and duodenal neuroendocrine tumors

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World Journal of Gastroenterology 2016年第30期22卷 6817-6828页

作者： Yuichi Sato Satoru Hashimoto Ken-ichi Mizuno Manabu takeuchi Shuji Terai Department of Gastroenterology Niigata University Graduate School of Medical and Dental Sciences Division of Endoscopy Niigata University Medical and Dental Hospital

Gastrointestinal neuroendocrine tumors (GI-NETs) are rare neoplasms, like all NETs. However, the incidence of GI-NETS has been increasing in recent years. Gastric NETs (G-NETs) and duodenal NETs (D-NETs) are the common types of upper GI-NETs based on tumor location. G-NETs are classified into three distinct subgroups: type I, II, and III. Type I G-NETs, which are the most common subtype (70%-80% of all G-NETs), are associated with chronic atrophic gastritis, including autoimmune gastritis and Helicobacter pylori associated atrophic gastritis. Type II G-NETs (5%-6%) are associated with multiple endocrine neoplasia type 1 and Zollinger-Ellison syndrome (MEN1-ZES). Both type I and II G-NETs are related to hypergastrinemia, are small in size, occur in multiple numbers, and are generally benign. In contrast, type III G-NETs (10%-15%) are not associated with hypergastrinemia, are large-sized single tumors, and are usually malignant. Therefore, surgical resection and chemotherapy are generally necessary for type III G-NETs, while endoscopic resection and follow-up, which are acceptable for the treatment of most type I and II G-NETs, are only acceptable for small and well differentiated type III G-NETs. D-NETs include gastrinomas (50%-60%), somatostatin-producing tumors (15%), nonfunctional serotonin-containing tumors (20%), poorly differentiated neuroendocrine carcinomas (< 3%), and gangliocytic paragangliomas (< 2%). Most D-NETs are located in the first or second part of the duodenum, with 20% occurring in the periampullary region. Therapy for D-NETs is based on tumor size, location, histological grade, stage, and tumor type. While endoscopic resection may be considered for small nonfunctional D-NETs (G1) located in the higher papilla region, surgical resection is necessary for most other D-NETs. However, there is no consensus regarding the ideal treatment of D-NETs.

关键词： Gastric neuroendocrine tumors Duodenal neuroendocrine tumors Classification Endoscopic treatment Endoscopic submucosal dissection

Recent advances in particulate drug delivery systems: Oral, pulmonary, and ophthalmic administrations

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Asian Journal of Pharmaceutical Sciences 2016年第1期11卷 3-4页

作者： Hirofumi takeuchi Kohei Tahara Risako Onodera Gifu Pharmaceutical University

Colloidal drug carriers such as liposomes,lipid emulsions,and polymeric nanoparticles have great potential to deliver drugs *** of nano-crystals of API has also received much attention to design dosage forms to complete effective drug delivery.A variety of investigations have been carried out toward the design of an optimal particulate system.

关键词： Drug delivery systems Liposomes Administration routes Absorption

Heavy Metal-Polluted Aerosols Collected at a Rural Site,Northwest China

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Journal of Earth Science 2017年第3期28卷 535-544页

作者： Xiaoyu Zhang Zhongqin Li Nozomu takeuchi Feiteng Wang Shengjie Wang Xiaoni You Ping Zhou State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environment and Engineering Research InstituteTianshan Glaciological StationChinese Academy of SciencesLanzhou 730000China Department of Earth Sciences Graduate School of ScieneeChiba UniversityChiba 263-8522Japan College of Geography and Environment Science Northwest Normal UniversityLanzhou 730000China Tianshui Normal University Tianshui 741001China

Daily samples of aerosol（n=27） were collected from September 21 st to October 4th, 2013 in Fukang（44.17°N, 88.45°E, 475 m a.s.l.）, Xinjiang, Northwest China. The enrichment factors（EFc） of selected 49 elements showed that the aerosols had extremely high concentrations of heavy metals, probably indicating their anthropogenic origins. Morphology of individual aerosol particles was determined by scanning electron microscopy and energy-dispersive X-ray microanalysis. Based on morphology and elemental composition, the particles were clustered into three dominant types：（Ⅰ） crustal originated particles： Si/Al-rich particles（36%） and Si/Fe-rich particles（24%）;（Ⅱ） mixed source particles; and（Ⅲ） pollution derived particles： Pb-rich particles（10%）. The backward trajectories were calculated using the HYSPLIT model, and the results indicated the different anthropogenic sources for heavy metals in Fukang aerosols. Air mass from north was identified as the most polluted source when compared to south and west.

关键词： heavy metal pollution aerosols Central Asia

Phenology and classification of abandoned agricultural land based on ALOS-1 and 2 PALSAR multi-temporal measurements

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International Journal of Digital Earth 2017年第2期10卷 155-174页

作者： Noryusdiana Mohamad Yusoff Farrah Melissa Muharam Wataru takeuchi Soni Darmawan Muhamad Hafiz Abd Razak Department of Agriculture Technology Faculty of AgricultureUniversiti Putra MalaysiaSerdangMalaysia Malaysian Remote Sensing Agency Kuala LumpurMalaysia Institute of Plantation Studies Universiti Putra MalaysiaSelangorMalaysia Institute of Industrial Science University of TokyoMeguro-kuJapan Institut Teknologi Nasional(ITENAS) West JavaIndonesia FELCRA Berhad Kuala LumpurMalaysia

Agricultural crop abandonment negatively impacts local economy and environment since land,as a resource for agriculture,is not optimally *** take necessary actions to rehabilitate abandoned agricultural lands,the identification of the spatial distribution of these lands must be *** optical images had previously illustrated potentials in the identification of agricultural land abandonment,tropical areas often suffer cloud coverage problem that limits the availability of the ***,this study was conducted to investigate the potential of ALOS-1 and 2(Advanced Land Observing Satellite-1 and 2)PALSAR(Phased Array L-band Synthetic Aperture Radar)images for the identification and classification of abandoned agricultural crop areas,namely paddy,rubber and oil palm *** crop phenology for paddy and rubber was identified from ALOS-1 PALSAR;nonetheless,oil palm did not demonstrate any useful phenology for discriminating between the abandoned *** accuracy obtained for these abandoned lands of paddy,rubber and oil palm was 93.33%±0.06%,78%±2.32%and 63.33%±1.88%,*** study confirmed that the understanding of crop phenology in relation to image date selection is essential to obtain high accuracy for classifying abandoned and non-abandoned agricultural *** finding also portrayed that PALSAR offers a huge advantage for application of vegetation in tropical areas.

关键词： Classification land abandonment agriculture ALOS PALSAR synthetic aperture radar

Clinical impact of chemotherapy to improve tumor microenvironment of pancreatic cancer

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World Journal of Gastrointestinal Oncology 2016年第11期8卷 786-792页

作者： Takahiro Tsuchikawa Shintaro takeuchi Toru Nakamura Toshiaki Shichinohe Satoshi Hirano Department of Gastro-enterological Surgery Ⅱ Hokkaido University Graduate School of Medicine

A perioperative multimodal strategy including combination chemotherapy and radiotherapy, in addition to surgical resection, has been acknowledged to improve patient prognosis. However chemotherapy has not been actively applied as an immunomodulating modality because of concerns about various immunosuppressive effects. It has recently been shown that certain chemotherapeutic agents could modify tumor microenvironment and host immune responses through several underlying mechanisms such as immunogenic cell death, local T-cell infiltration and also the eradication of immune-suppressing regulatory cells such as regulatory T cells(Tregs) and myeloid-derived suppressor cells. With the better understanding of the cell components in the tumor microenvironment and the effect of chemotherapy to improve tumor microenvironment, it has been gradually clear that the chemotherapeutic agents is two-edged sword to have both immune promoting and suppressing effects. The cellular components of the tumor microenvironment include infiltrating T lymphocytes, dendritic cells, regulatory T cells, tumor associated macrophages, myeloid derived suppressor cells and cancer associated fibroblasts. Based on the better understanding of tumor microenvironment following chemotherapy, the treatment protocol could be modified as personalized medicine and the prognosis of pancreas cancer would be more improved utilizing multimodal chemotherapy. Here we review the recent advances of chemotherapy to improve tumor microenvironment of pancreatic cancer, introducing the unique feature of tumor microenvironment of pancreatic cancer, interaction between anti-cancer reagents and these constituting cells and future prospects.

关键词： Pancreas cancer Microenvironment Chemotherapy Immune cells Immunomodulation

Adhesion Force Measurements of Polymer Particles by Detachment Field Method

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仪器仪表学报 2004年第S3期 62-66页

作者： Masashi Nagayama ,Nobuyasu Sakurai,Tatsuaki Wada,Manabu takeuchi Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan Department of Electrical and Electronic Engineering Ibaraki University Hitachi 316-8511 Japan

The adhesion force distributions of polymer particles to aluminum substrates were measured by the detachment field method. Polymer particles with conducting surface treatment were used for the measurements. Further the conventional detachment field method was modified to be applicable to the adhesion force measurements of a single particle. The adhesion force of the polymer particles increased with an increase in relative humidity. The surface roughness of the substrate influenced the adhesion forces of particles significantly. The influence of the CF4 plasma treatment of the polymer particles and thin layer coating of the substrate surface on the adhesion forces of the polymer particles was also studied, and factors affecting adhesion forces of polymer particles are discussed.

关键词： Toner Adhesion force van der Waals force