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Synthesis of N-doped Carbon Spheres Using Extended Stöber Method for SO2 Adsorption
Yunqian Li,Yifeng Yu,Lei Liu,Hongliang Zhang,Guoxu Wang,Aibing Chen 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.1
SO2 is one of the major pollutants in the atmosphere. N-doped microporous carbon spheres (NCS) have been demonstrated to be effective for SO2 adsorption. Here we report the synthesis of monodispersed NCS by the extended Stöber method with urea resorcinol-formaldehyde resins as carbon source, urea as nitrogen source and ammonia as catalyst in an ethanol-water mixed solvent. The obtained carbon spheres show a uniform diameter of around 550 nm, specific surface area of 476 m2 g-1, micropores pore volume of 0.20 cm3 g-1 and nitrogen doping. The NCS manifest special performance for SO2 capture with capability of 75.34 mg g-1 and good cycling stability, due to the large surface area, abundant micropores and nitrogen functionality.
Zhibin Li,Yubo Wang,Liyan Zhao,Yunqian Li 대한척추신경외과학회 2024 Neurospine Vol.21 No.1
Primary atypical teratoid/rhabdoid tumors (AT/RTs) in the spinal canal are rare central nervous system (CNS) neoplasms that are challenging to diagnose and treat. To date, there has been no standard treatment regimen for these challenging malignant tumors. Thus, we conducted this research to explore potential prognostic factors and feasible treatment modalities for improving the prognosis of these tumors. Articles were retrieved from the PubMed, MEDLINE, and Embase databases, using the keywords “atypical teratoid/rhabdoid tumor,” “rhabdoid tumor,” “spine,” “spinal,” “spinal neoplasm”, and “spinal cord neoplasm.” All eligible cases demonstrated SMARCB1-deficient expression validated by pathological examination. We collected and analyzed data related to clinical presentation, radiological features, pathological characteristics, treatment modalities and prognosis via Kaplan-Meier and Cox regression analyses. Thirty-six articles comprising 58 spinal AT/RT patients were included in the study. The median progression-free survival (PFS) and overall survival (OS) were 18 and 22 months, respectively. Kaplan-Meier analysis demonstrated significant survival improvements for OS in the nonmetastasis, male, radiotherapy and intrathecal chemotherapy groups as well as for PFS in the chemotherapy and radiotherapy groups. Multivariate analysis revealed that chemotherapy and radiotherapy were prognostic factors for improved PFS, and that intrathecal chemotherapy reduced the risk of mortality. Spinal AT/RTs are uncommon malignant entities with a dismal survival rate. Although our review is limited by variability between cases, there is some evidence revealing potential risk factors and the importance of systematic chemotherapy, intrathecal chemotherapy and radiotherapy in spinal AT/RT treatment modalities.
Dai, Yunqian,Lim, Byungkwon,Yang, Yong,Cobley, Claire M.,Li, Weiyang,Cho, Eun Chul,Grayson, Benjamin,Fanson, Paul T.,Campbell, Charles T.,Sun, Yueming,Xia, Younan WILEY‐VCH Verlag 2010 Angewandte Chemie Vol.122 No.44
<P><B>Stützt ohne zu stören</B>: Das Aufbringen einer porösen SiO<SUB>2</SUB>‐Schicht auf Pt‐modifizierte TiO<SUB>2</SUB>‐Nanofasern ergibt einen sinterbeständigen Katalysator (siehe Bild). Die Pt‐Nanopartikel sinterten bei Temperaturen bis 750 °C an Luft nicht, weil die SiO<SUB>2</SUB>‐Schicht die Oberflächenwanderung physikalisch behindert; wegen der Porosität der Beschichtung behielt das System seine katalytische Aktivität aber bei.</P>