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Radio-photoluminescence properties of CaF2 transparent and opaque ceramics
Kato Takumi,Nakauchi Daisuke,Kawaguchi Noriaki,Yanagida Takayuki 한국물리학회 2020 Current Applied Physics Vol.20 No.11
Radio-photoluminescence (RPL) phenomenon was observed in CaF2 transparent and opaque ceramics by X-ray irradiation. The RPL appeared as a formation of photoluminescence (PL) emission bands located around 660 and 720 nm caused by F2+ and (F2+)A centers, respectively. The RPL signal can be deleted by heating, and reusability was observed over ten experimental cycles. The fading of the RPL signal was confirmed to be ~4% in 10 days. The detectable RPL response of CaF2 transparent ceramics was as low as 1 mGy, and the dynamic ranges were confirmed over 1–10000 mGy with linear response.
Cleft Lip and Palate Repair Using a Surgical Microscope
Kato, Motoi,Watanabe, Azusa,Watanabe, Shoji,Utsunomiya, Hiroki,Yokoyama, Takayuki,Ogishima, Shinya Korean Society of Plastic and Reconstructive Surge 2017 Archives of Plastic Surgery Vol.44 No.6
Background Cleft lip and palate repair requires a deep and small surgical field and is usually performed by surgeons wearing surgical loupes. Surgeons with loupes can obtain a wider surgical view, although headlights are required for the deepest procedures. Surgical microscopes offer comfort and a clear and magnification-adjustable surgical site that can be shared with the whole team, including observers, and easily recorded to further the education of junior surgeons. Magnification adjustments are convenient for precise procedures such as muscle dissection of the soft palate. Methods We performed a comparative investigation of 18 cleft operations that utilized either surgical loupes or microscopy. Paper-based questionnaires were completed by staff nurses to evaluate what went well and what could be improved in each procedure. The operating time, complication rate, and scores of the questionnaire responses were statistically analyzed. Results The operating time when microscopy was used was not significantly longer than when surgical loupes were utilized. The surgical field was clearly shared with surgical assistants, nurses, anesthesiologists, and students via microscope-linked monitors. Passing surgical equipment was easier when sharing the surgical view, and preoperative microscope preparation did not interfere with the duties of the staff nurses. Conclusions Surgical microscopy was demonstrated to be useful during cleft operations.
Kyoichi Kato,Ken Fukunaga,Koji Kamikozuru,Shinichiro Kashiwamura,Nobuyuki Hida,Yoshio Ohda,Naohisa Takeda,Koji Yoshida,Masaki Iimuro,Yoko Yokoyama,Risa Kikuyama,Hiroto Miwa,Takayuki Matsumoto 거트앤리버 소화기연관학회협의회 2011 Gut and Liver Vol.5 No.1
Background/Aims: Infliximab (IFX), an antibody to tumor necrosis factor, (TNF)-α has effi cacy in treating Crohn’s disease (CD). However, knowledge of the potential effects of IFX on patients’ immune profi les is lacking. The purpose of this study was to reveal the immunological effects of IFX. Methods: Twenty-two patients with a CD activity index (CDAI)of 194.2±92.9 and an average duration of disease of 3.26months and 21 healthy controls were included. Patients were to have their fi rst IFX remission induction therapy with 3 infusions (5 mg/kg) at weeks 0, 2, and 6. Oral 5-aminosalicylic acid was the only ongoing medication in the patient population. Blood samples at baseline, 12 hours after the first infusion and at week 14 were labeled with anti-CD4/CD25 antibodies for immunohistochemical measurement of regulatory T-cells (Treg). Serum cytokines and chemokines were measured by suspension array and ELISA. Results:CDAI signifi cantly decreased prior to the second IFX infusion (p<0.001). Clinical remission rates were 77.3% and 91% by the second and third infusions, respectively. At baseline, interleukin (IL)-6 (p<0.03), IL-8 (p<0.03), IL-10 (p=0.050), IL-13(p<0.01), transforming growth factor-β1 (p<0.01), and ‘regulated on activation, normal T cell expressed and secreted’(RANTES) (p<0.01) were elevated in patients. After the initial IFX infusion, TNF-α (p<0.04), IL-6 (p<0.03), interferon (IFN)-γ(p<0.04), IFN-γ-inducible protein-10 (p<0.01), monocyte chemoattractant protein-1 (p<0.01), macrophage infl ammatory protein-1β (p<0.01), and RANTES (p<0.01) were decreased. IFX infusion was associated with an increase in Treg (p<0.01)and a decrease in the Th1 (IFN-γ)/Th2 (IL-4) ratio (p<0.03). Conclusions: IFX use was associated with restoration of the Th1/Th2 balance after a single infusion and seemed to promote induction of naïve Th0 lymphocytes to Treg. This knowledge should have clinical relevance.
Dosimetric properties of Mg-doped Al2O3 transparent ceramics
Takumi Kato,Noriaki Kawaguchi,Takayuki Yanagida 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.5
Transparent ceramics of Al2O3 doped with different concentrations of Mg2+ ions (0.001, 0.01, 0.1 and 1.0%) were synthesized by the Spark Plasma Sintering (SPS) method, and scintillation and dosimetric properties were investigated. Under X-ray irradiation, all the samples showed emission peaks around 310, 380 and 693 nm. Based on the measured scintillation decay times and previous studies, the origins of the emission peaks at 310, 380 and 693 nm were attributed to F+ centers, F centers and Cr3+ impurity ions, respectively. The 0.1% Mg-doped sample showed a glow curve consisting of peaks around 50, 105, 135, 230, 350 and 400 oC. All the samples had a linear TSL response in a dose range from 0.1 to 1,000 mGy.
Cleft Lip and Palate Repair Using a Surgical Microscope
Motoi Kato,Azusa Watanabe,Shoji Watanabe,Hiroki Utsunomiya,Takayuki Yokoyama,Shinya Ogishima 대한성형외과학회 2017 Archives of Plastic Surgery Vol.44 No.6
Background Cleft lip and palate repair requires a deep and small surgical field and is usually performed by surgeons wearing surgical loupes. Surgeons with loupes can obtain a wider surgical view, although headlights are required for the deepest procedures. Surgical microscopes offer comfort and a clear and magnification-adjustable surgical site that can be shared with the whole team, including observers, and easily recorded to further the education of junior surgeons. Magnification adjustments are convenient for precise procedures such as muscle dissection of the soft palate. Methods We performed a comparative investigation of 18 cleft operations that utilized either surgical loupes or microscopy. Paper-based questionnaires were completed by staff nurses to evaluate what went well and what could be improved in each procedure. The operating time, complication rate, and scores of the questionnaire responses were statistically analyzed. Results The operating time when microscopy was used was not significantly longer than when surgical loupes were utilized. The surgical field was clearly shared with surgical assistants, nurses, anesthesiologists, and students via microscope-linked monitors. Passing surgical equipment was easier when sharing the surgical view, and preoperative microscope preparation did not interfere with the duties of the staff nurses. Conclusions Surgical microscopy was demonstrated to be useful during cleft operations.
Keizo Kato,Kazuki Takahashi,Keisuke Suzuki,Takayuki Sato,Kazunari Shinbo,Futao Kaneko,Hidehiko Shimizu,Nozomu Tsuboi,Toyoyasu Tadokoro,Shinichi Ohta 한국물리학회 2005 Current Applied Physics Vol.5 No.4
Organic light emitting diodes (OLEDs) with nanostructured ultrathin layers inserted at the interface between electron- and hole-transport layers were investigated. The fundamental structure of the OLEDs fabricated by a vacuum evaporation method wasindium-tin-oxide (ITO) anode/copper phthalocyanine (CuPc)/N,N0-diphenyl-N,N0-bis(3-methylphenyl)-1,10-diphenyl-4,40-diamine(TPD)/8-hydroxyquinoline aluminum (Alq3)/LiF/Al cathode. Fullerene (C60) and rhodamine B (RhB) molecules were used as thenanosutructured ultrathin layers inserted at the interface between the Alq3 and TPD layers. The electroluminescent (EL) propertieshave been measured for the OLEDs with C60 and RhB ultrathin layers and the dependences on the thickness and the position of theinserted layers were examined. For the OLEDs with the C60 ultrathin layer, the improvements of the drive voltage and EL eciencywere observed. The OLED with the inserted C60 ultrathin lm of a monolayer thickness showed the highest eciency, which wastwice as large as that without C60 layer. On the contrary, the improvements were not observed for the OLEDs with the RhB ul-trathin layer..