检索结果-南通市图书馆

Assessment of Flow Drive by Use of Ion Bernstein Wave on Heliotron J and EAST Devices

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2006年第1期8卷 125-128页

作者： YukiTORII HiroyukiOKADA Tetsuo watari Hiroki KITAGAWA YasuhiroSUZUKI MasayukiYOKOYAMA 赵燕平 Kazunobu NAGASAKI Institute of Advanced Energy Kyoto UniversityUjiJapan National Institute for Fusion Science TokiJapan Graduate School of Energy Science Kyoto UniversityKyotoJapan Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

The possibility of driving poloidal flows by use of ion Bernstein wave is assessed for Heliotron J and EAST devices by means of ray tracing analysis. Sheared poloidal flow is expected to suppress plasma turbulences due to the decorrelation of the waves. In Heliotron J and EAST plasma, the rays of Ion Bernstein Wave travel into the central region with oscillations along the magnetic lines of force and their power is absorbed by ions at the cyclotron resonance layers. The momentum input has been estimated by calculating the momentum change of rays and the poloidal flow has been estimated using neoclassical viscosities. The wave momentum changes its sign as it propagates inward, depositing sheared momentum to the plasma, and therefore causes sheared poloidal flows.

关键词： Heliotron J EAST ion Bernstein wave

Calcitonin and vitamin D3 have high therapeutic potential for improving diabetic mandibular growth

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2016年第1期8卷 39-44页

作者： Mona A Abbassy Ippei watari Ahmed S Bakry Takashi Ono Ali H Hassan Orthodontic Department Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia Department of Orofacial Development and Function Division of Oral Health SciencesGraduate SchoolTokyo Medical and Dental UniversityTokyoJapan Alexandria University AlexandriaEgypt Conservative Dentistry Department Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia Cariology and Operative Dentistry Department Graduate School of Medical and Dental SciencesTokyo Medical&Dental UniversityTokyoJapan Conservative Dentistry Department Faculty of DentistryAlexandria UniversityAlexandriaEgypt

The goal of this study was to assess the effect of the intermittent combination of an antiresorptive agent （calcitonin） and an anabolic agent （vitamin D3） on treating the detrimental effects of Type 1 diabetes mellitus （DM） on mandibular bone formation and growth. Forty 3-week-old male Wistar rats were divided into four groups： the control group （normal rats）, the control C＋D group （normal rats injected with calcitonin and vitamin D3）, the diabetic C＋D group （diabetic rats injected with calcitonin and vitamin D3） and the diabetic group （uncontrolled diabetic rats）. An experimental DM condition was induced in the male Wistar rats in the diabetic and diabetic C＋ D groups using a single dose of 60 ***-1 body weight of streptozotocin. Calcitonin and vitamin D3 were simultaneously injected in the rats of the control C＋D and diabetic C＋D groups. All rats were killed after 4 weeks, and the right mandibles were evaluated by micro-computed tomography and histomorphometric analysis. Diabetic rats showed a significant deterioration in bone quality and bone formation （diabetic group）. By contrast, with the injection of calcitonin and vitamin D3, both bone parameters and bone formation significantly improved （diabetic C＋ D group）（P 〈 0.05）. These findings suggest that these two hormones might potentially improve various bone properties.

关键词： type 1 diabetes mellitus mandibular bone structure mandibular bone formation micro-computed tomography bone histomorphometry

Fiber-reinforced scaffolds in soft tissue engineering

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2017年第4期4卷 257-268页

作者： Baoqing Pei Wei Wang Yubo Fan Xiumei Wang Fumio watari Xiaoming Li Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical EngineeringBeihang UniversityBeijing 100191China State Key Laboratory of New Ceramic and Fine Processing Tsinghua UniversityBeijing 100084China Department of Biomedical Materials and Engineering Graduate School of Dental MedicineHokkaido UniversitySapporo 060-8586Japan

Soft tissue engineering has been developed as a new strategy for repairing damaged or diseased soft tissues and organs to overcome the limitations of current *** most of soft tissues in the human body are usually supported by collagen fibers to form a three-dimensional microstructure,fiber-reinforced scaffolds have the advantage to mimic the structure,mechanical and biological environment of natural soft tissues,which benefits for their regeneration and *** article reviews and discusses the latest research advances on design and manufacture of novel fiber-reinforced scaffolds for soft tissue repair and how fiber addition affects their structural characteristics,mechanical strength and biological activities in vitro and in *** general,the concept of fiber-reinforced scaffolds with adjustable microstructures,mechanical properties and degradation rates can provide an effective platform and promising method for developing satisfactory biomechanically functional implantations for soft tissue engineering or regenerative medicine.

关键词： scaffolds reinforce fibers soft tissue

Pathogenesis of NSAID-induced gastric damage:Importance of cyclooxygenase inhibition and gastric hypermotility

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第18期18卷 2147-2160页

作者： koji Takeuchi Department of Pharmacology and Experimental Therapeutics Division of Pathological SciencesKyoto Pharmaceutical UniversityKyoto 607-8414Japan

This article reviews the pathogenic mechanism of nonsteroidal anti-inflammatory drug(NSAID)-induced gastric damage,focusing on the relation between cyclooxygenase(COX) inhibition and various functional ***,such as indomethacin,at a dose that inhibits prostaglandin(PG) production,enhance gastric motility,resulting in an increase in mucosal permeability,neutrophil infiltration and oxyradical production,and eventually producing gastric *** lesions are prevented by pretreatment with PGE 2 and antisecretory drugs,and also via an atropine-sensitive mechanism,not related to antisecretory *** neither rofecoxib(a selective COX-2 inhibitor) nor SC-560(a selective COX-1 inhibitor) alone damages the stomach,the combined administration of these drugs provokes gastric ***-560,but not rofecoxib,decreases prostaglandin E 2(PGE 2) production and causes gastric hypermotility and an increase in mucosal ***-2 mRNA is expressed in the stomach after administration of indomethacin and SC-560 but not *** up-regulation of indomethacin-induced COX-2 expression is prevented by atropine at a dose that inhibits gastric *** addition,selective COX-2 inhibitors have deleterious influences on the stomach when COX-2 is overexpressed under various conditions,including adrenalectomy,arthritis,and Helicobacter *** summary,gastric hypermotility plays a primary role in the pathogenesis of NSAID-induced gastric damage,and the response,causally related with PG deficiency due to COX-1 inhibition,occurs prior to other pathogenic events such as increased mucosal permeability;and the ulcerogenic properties of NSAIDs require the inhibition of both COX-1 and COX-2,the inhibition of COX-1 upregulates COX-2 expression in association with gastric hypermotility,and PGs produced by COX-2 counteract the deleterious effect of COX-1 inhibition.

关键词： Non-steroidal anti-inflammatory drug Gastric damage Pathogenesis Gastric motility Neutrophil

Dopamine as a growth differentiation factor in the mammalian brain

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2020年第3期15卷 390-393页

作者： koji Ohira Laboratory of Nutritional Brain Science Department of Food Science and Nutrition Mukogawa Women’s University

The catecholamine,dopamine,plays an important role in the central nervous system of mammals,including executive functions,motor control,motivation,arousal,reinforcement,and *** of the dopaminergic system lead to diseases of the brains,such as Parkinson’s disease,Tourette’s syndrome,and *** addition to its fundamental role as a neurotransmitter,there is evidence for a role as a growth differentiation factor during *** studies suggest that dopamine regulates the development ofγ-aminobutyric acidergic interneurons of the cerebral ***,in adult brains,dopamine increases the production of new neurons in the hippocampus,suggesting the promoting effect of dopamine on proliferation and differentiation of neural stem cells and progenitor cells in the adult *** this mini-review,I center my attention on dopaminergic functions in the cortical interneurons during development and further discuss cell therapy against neurodegenerative diseases.

关键词： γ-aminobutyric acidergic interneuron adult neurogenesis cerebral cortex dopamine GABA medial ganglionic eminence migration striatum

Will GHz burst mode create a new path to femtosecond laser processing?

在线全文

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2021年第4期3卷 56-59页

作者： koji Sugioka RIKEN Center for Advanced Photonics 2-1 HirosawaWako-shiSaitama 351-0198Japan

The GHz burst mode of femtosecond laser pulses can significantly improve ablation efficiency without deteriorating ablation ***,various parameters involved in GHz burst mode make it difficult to optimize the processing for practical *** this Perspective,the author gives the history,current status,and future challenges and prospects of this new strategy to answer the question,'will GHz burst mode create a new path to femtosecond laser processing?'

关键词： laser femtosecond mode

Zonal Flows and Geodesic Acoustic Mode Oscillations in Tokamaks and Helical Systems

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2006年第1期8卷 105-109页

作者： T. watari Y. HAMADA A. NISHIZAWA T. NOTAKE N. TAKEUCHI National Institute for Fusion Science 322-6 Oroshi-cho Toki-city Gifu Japan Ariake National College of Technology 150 Higashihagio-Machi Omuta Fukuoka Japan

This paper reviews the theoretical foundations of zonal flow, putting emphasis on the linear response function of plasma to the external flow drive. An extension of the theory is made in order to apply it to helical systems and to study the properties of the zonal flow in the low frequency range. Further refinement of the theory is made incorporating the orbital effects of particles more precisely, and the role of neoclassical polarization current is identified.

关键词： zonal flow geodesic acousti mode finite orbit effect coupling to ion acoustic mode

Shock Wave Observation in Narrow Tubes for a Parametric Study on Micro Wave Rotor Design

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2008年第2期17卷 134-140页

作者： koji Okamoto Mikiya Araki Department of Aeronautics and Astronautics University of Tokyo Department of Mechanical Engineering Gunma University

Wave rotor is expected to improve the performance of micro gas turbines drastically. In the wave rotor design, the rotor speed is determined principally by the tube length. Therefore, a longer tube is preferable for miniaturized wave rotors to avoid the difficulty in bearings and lubrication system, while it may yield thicker wall boundary layer, shock wave dissipation and so on. In the present study, an experimental apparatus was built to visualize the wave rotor internal flow dynamics in a narrow tube by schlieren method and Laser Doppler Anemometry. In addi- tion, different lengths of the tube were adopted and compared to investigate the effect of wall friction. Finally, 2D numerical simulation was performed and the results were compared with those of experiments.

关键词： wave rotor shock wave unsteady flow micro propulsion flow visualization.

Carbon Nanotube Coating on Titanium Substrate Modified with TiO_2 Nanotubes

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 867-871页

作者：白玉 PARK Ilsong BAE Taesung KIM Kyounga watari Fumio UO Motohiro LEE Minho Department of Dental Biomaterials School of Dentistry and Institute of Oral BioscienceBrain Korea 21 ProjectChonbuk National University School of Materials Science and Engineering Inner Mongolia University of Technology Department of Conservative Dentistry Institute of Oral Bioscience and BK 21 ProjectSchool of DentistryChonbuk National University Biomedical Dental Materials and EngineeringDepartment of Oral Health ScienceGraduate School of Dental MedicineHokkaido University Advanced Biomaterials Section Graduate School of Medical and Dental SciencesTokyo Medical and Dental University

A combination of carbon nanotubes （CNTs） and titanium （Ti） modified with TiO2 nanotubes （TiO2 NTs） was fulfilled with the aim of improving bioactivity of Ti ***,well-ordered TiO2 NTs were prepared by the electrochemical anodization of Ti in an ethylene glycol electrolyte containing 1 wt% NH4F and 10 wt% H2O at 20 V for 50 min,followed by ***,the carboxylated CNTs were coated onto the TiO2 NTs using electrophoretic deposition （EPD） *** growth of hydroxyapatite （HA） on the samples was investigated by soaking them in simulated body fluid （SBF）.The result showed the CNTs-coated Ti with the modification of TiO2 NTs （CNTs-TiO2 NTs） was more efficient to induce HA formation than the CNTs-coated smooth Ti （CNTs-Ti）.The vitro cell response was evaluated using osteoblast cells （MC3T3-E1）.The good cell proliferation and strong cell adhesion could be obtained on the CNTs-TiO2 *** results indicated that CNT coating on the Ti modified with TiO2 NTs could be potentially useful for the periodontal ligament combination on dental implants.

关键词： carbon nanotubes TiO2 nanotubes apatite-forming ability cell adhesion