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강승원,Wipakorn Jevasuwan,Naoki Fukata,배준호 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.9
We report on novel electrochemical capacitors with silicon nanowire (Si NW) electrodes prepared by a chemical vapor deposition (CVD) method. Si NWs were deposited on conductive stainless steel through the CVD method to form electrodes of the electrochemical capacitors. Electrochemical characteristics of Si NW electrodes were investigated and compared with those of bulk silicon wafer electrodes. Si NWs resulted in larger area-specific capacitance (>10 times) than bulk silicon, which is attributed to the enhanced surface area of NW morphology. NWs also exhibited high maximum and average mass-specific capacitances of 510 and 117 F g−1, respectively. Our study demonstrates that semiconductor Si NWs can be useful as electrodes of high-performance supercapacitors and next generation NWs-based architecture for electrochemical energy storages.
Shinji Tanishima,Hideki Nagashima,Hiroyuki Ishii,Satoru Fukata,Toshiyuki Dokai,Taiki Murakami,Yasuo Morio 대한척추외과학회 2017 Asian Spine Journal Vol.11 No.5
Study Design: Prospective study. Purpose: To examine the changes in body sway using stabilometry in patients who underwent cervical laminoplasty for cervical myelopathy. Overview of Literature: Although the patients of cervical myelopathy complain body sway there are few report to examine body sway objectively. Methods: Patients who received treatment for cervical myelopathy between October 2010 and February 2013 were included. Twentyone patients underwent cervical laminoplasty (myelopathy group). Body sway was assessed using stabilometry, wherein patients stood on a stabilometer with their eyes closed for 30 seconds. The Romberg ratio, outer peripheral area (OPA) with eyes closed (cm2), and total locus length per unit area (L/A) with eyes closed (/cm) were examined. Examinations were performed preoperatively (at baseline) and at 8 weeks postoperatively. Examination results of patients in the myelopathy group were compared with those of 17 healthy individuals (control group). Clinical symptoms were evaluated using the Japanese Orthopaedic Association scale score (JOA score) and the timed up and go (TUG) test. Results: In the myelopathy and control groups, the mean baseline Romberg ratio, OPA, and L/A were 2.3±1.2, 8.9±5.5 cm2, and 14.2±5.3/cm and 1.4±1.0, 4.3±2.8 cm2, and 23.7±10.1/cm, respectively. Eight weeks after laminoplasty, only L/A showed significant improvement from baseline in the myelopathy group (23.2±10.1 to 16.8±7.9; p =0.03). The Romberg ratio and OPA showed improvement in the myelopathy group, but the changes were not statistically significant. JOA scores and TUG test results in this group significantly improved from baseline to 8 weeks after laminoplasty (12.7 to 13.4 and 10.8 to 8.0 seconds, respectively; both p <0.05). Conclusions: L/A is a useful parameter for measuring body sway to assess the recovery of body sway after laminoplasty.
Template-oriented synthesis of hydroxyapatite nanoplates for 3D bone printing
Doustkhah, Esmail,Najafi Zare, Reza,Yamauchi, Yusuke,Taheri-Kafrani, Asghar,Mohtasham, Hamed,Esmat, Mohamed,Ide, Yusuke,Fukata, Naoki,Rostamnia, Sadegh,Sadeghi, Morteza H.,Assadi, M. Hussein N. Royal Society of Chemistry 2019 Journal of Materials Chemistry B Vol. No.
<P>The design of hydroxyapatite (HA) nanoarchitecture is critical for fabricating artificial bone tissues as it dictates the biochemical and the mechanical properties of the final product. Herein, we incorporated a simple hard-template approach to synthesise single crystal nanoplates of HA. We used the 2D graphitic nitride (g-C3N4) material to prepare an HA sol-gel under hydrothermal conditions. A new HA nanostructure was then formed during the calcination and removal of g-C3N4 at a higher temperature, which finally led to the production of nanoplates (thickness of ∼100 nm) while in lateral dimension the average size was in the micrometre scale. We characterised the synthesised HA nanoplates with XRD, TEM, and HRTEM. The theoretically predicted nanostructure construction based on Wulff's method is in full agreement with the experimental observations. We then prepared different weight ratios of HA and polylactic acid (PLA) composites for artificial 3D bone fabrication. The strong interaction between PLA and HA's (110) facet, which was the second most prevalent, resulted in the composite's mechanical robustness. After mechanical testing, an optimum ratio was selected for biological studies and 3D printing. Biological experiments demonstrated that the synthesised composite had excellent viability <I>in vitro</I>.</P>
Shinji Tanishima,Tokumitsu Mihara,Atsushi Tanida,Chikako Takeda,Masaaki Murata,Toshiaki Takahashi,Koji Yamane,Tsugutake Morishita,Yasuo Morio,Hiroyuki Ishii,Satoru Fukata,Yoshiro Nanjo,Yuki Hamamoto,T 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.3
Study Design: Multicenter, prospective study. Purpose: To investigate the effects of diabetes mellitus (DM) on surgical outcomes in patients with cervical myelopathy. Overview of Literature: To date, few studies have investigated the influence of postoperative blood glucose or glycated hemoglobin (HbA1c) levels on surgical outcomes. Methods: The participants were patients who underwent surgery for the treatment of cervical spondylotic myelopathy and ossification of the posterior longitudinal ligament. The 61 cases were evaluated preoperatively and 1 year postoperatively using the Japanese Orthopaedic Association (JOA) scores and the JOA Cervical Myelopathy Evaluation Questionnaire (JOACMEQ). The study variables included fasting blood glucose and HbA1c levels measured preoperatively and at 1 week, 4 weeks, and 1 year postoperatively; the F-wave conduction velocity, latency, rate of occurrence, and M-wave latency in the ulnar and tibial nerves were measured preoperatively and at 1 year postoperatively. The patients were divided into a group without diabetes (N group, 42 patients) and a group with diabetes (DM group, 19 patients). We then assessed the associations between the surgical outcomes and each of the study variables. Results: JOA scores significantly improved in both groups; however, no significant between-group differences were found. There was no significant improvement in the JOACMEQ scores, which assessed cervical function, upper and lower limb function, and bladder function in both groups. We then subdivided the DM group into those with a good control of HbA1c after 1 year (DMG group, 12 patients) and those with HbA1c deterioration after 1 year (DMB group, seven patients), prior to comparing the surgical outcomes. The JOACMEQ scores for upper and lower limb function significantly improved in the DMG group (p<0.01). Compared with the DMB group, there were no significant increases in upper or lower limb function scores in the DMG group. Conclusions: Poor glycemic control might prevent postoperative functional recovery of the spinal cord.