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Supercapacitive behavior of mesoporous carbon CMK-3 in calcium nitrate aqueous electrolyte
Heming Luo,Deyi Zhang,Liwen Zheng,Longyan Lei,Jingxiang Wu,Jian Yang 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.4
Calcium nitrate Ca(NO3)2 aqueous solution was found to be an effective aqueous electrolyte for a supercapacitorusing ordered mesoporous carbon as the electrode materials. The supercapacitive behavior of ordered mesoporouscarbon CMK-3 electrode in Ca(NO3)2 aqueous electrolyte was investigated utilizing cyclic voltammetry (CV),electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge measurements. CMK-3 electrodeshows excellent supercapacitive behavior with wide voltage window, high specific gravimetric capacitance and satisfactoryelectrochemical stability in Ca(NO3)2 aqueous electrolyte. The specific gravimetric capacitance of CMK-3 electrodein Ca(NO3)2 aqueous electrolyte reaches 210 F g−1 at a current density of 1 A g−1, which is higher than that in conventionalaqueous electrolytes NaNO3 and KOH solution about 40% and 54%, respectively. The high charge density of the electricdouble layer formed at the interface of the CMK-3 electrode and Ca(NO3)2 aqueous electrolyte and the pseudo-capacitiveeffect originating from the oxygen groups on the surface of CMK-3 were believed to respond for the excellent supercapacitivebehavior of CMK-3 electrode in Ca(NO3)2 aqueous electrolyte.
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Junfeng Gong,Xinle Huang,Liwen Luo,Huan Liu,Hao Wu,Ying Tan,Changqing Li,Yu Tang,Yue Zhou 대한척추신경외과학회 2022 Neurospine Vol.19 No.2
Objective: Endoscopic transforaminal lumbar interbody fusion (Endo-TLIF) has gained increasing popularity among spine surgeons. However, with the use of fluoroscopy, intraoperative radiation exposure remains a major concern. Here, we aim to introduce Endo-TLIF assisted by O-arm-based navigation and compare the results between O-arm navigation and fluoroscopy groups. Methods: Sixty-four patients were retrospectively analyzed from May 2019 to September 2020; the nonnavigation group comprised 34 patients, and the navigation group comprised 30 patients. Data on radiation dose, blood loss, postoperative drains, surgery time, complications, and length of hospital stay (LOS) were collected. Clinical outcomes were evaluated from postoperative data such as fusion rate, Oswestry Disability Index (ODI), and visual analogue scale (VAS). Radiation dose and surgery time were selected as primary outcomes; the others were second outcomes. Results: All patients were followed up for at least 12 months. No significant differences were detected in intraoperative hemorrhage, postoperative drains, hospital LOS, or complications between the 2 groups. The radiation dose was significantly lower in the navigation group compared with the nonnavigation group. The time of cannula placement and pedicle screw fixation was significantly reduced in the navigation group. No significant differences were detected between the clinical outcomes in the 2 groups (VAS and ODI scores). Conclusion: The present study demonstrates that O-arm-assisted Endo-TLIF is efficient and safe. Compared with fluoroscopy, O-arm navigation could reduce the radiation exposure and surgical time in Endo-TLIF surgery, with similar clinical outcomes. However, the higher doses exposed to patients remains a negative effect of this technology.
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