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- 저자 : Xiao-Xun Ma (검색결과 3 건)
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Effect of novel intensification structure on drying of particulate materials in spouted beds
Shengning Zhao,Feng Wu,Xiao-Xun Ma,Wenjing Zhou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Through the hot air-drying experiment, the differences in drying rate, unit energy consumption, and bedpressure drop of the conventional spouted bed (CSB), the spouted bed with an integral swirling bladenozzle (ISBN), the spouted bed with spherical longitudinal vortex generators (LVGs), and the integralmulti-jet spout-fluidized bed (IMJSFB) were studied. The Weibull distribution function was introducedto fit the drying data, and the differences in moisture diffusion coefficient, scale parameters, and dryingactivation energy of the four types of spouted beds were further discussed. The drying performanceparameters of the four types of spouted beds were comprehensively evaluated. The results show that,compared with the CSB, LVGs and IMJSFB reduce the activation energy of the drying process, while theISBN increases the activation energy of the drying process. The IMJSFB shows more excellent performancein terms of drying rate, scale parameters, unit energy consumption, and bed pressure drop, with the highestcomprehensive score. Compared with CSB, ISBN and LVGs, the IMJSFB is more suitable for drying wetparticles. For the IMJSFB, there exists an optimal value of particle diameter (d = 2 mm) for the drying process,which makes the particle drying rate reach maximum.
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Ru(II) Polypyridyl Complexes-Sensitized TiO2 Nanotubes for Photoreduction of CO2 Aqueous Solution
Yan Nie,Chen Wang,Jun Li,Xiao-Xun Ma 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.12
Ruthenium (II) polypyridyl complexes modified titanium dioxide materials with anatase phase, the length of 10–100 nm, were synthesized by a hydrothermal method. Photocatalytic CO2 reduction experiments were performed in sensitized TiO2 aqueous suspensions under UV–Vis light in closed systems. And only methanol was detected in the liquid phase under the experiment condition. The effect of different photosensitizers content on the photoactivity of TiO2 was also studied, showing that Ru(BiDiPy)2(NCS)2 sensitized TiO2 was the optimal photocatalyst in transformation of CO2 to methanol. A possible mechanism for the photocatalytic reduction was also proposed in this paper.
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Li, Jing-Ping,Cao, Nai-Xia,Jiang, Ri-Ting,He, Shao-Jian,Huang, Tian-Ming,Wu, Bo,Chen, De-Feng,Ma, Ping,Chen, Li,Zhou, Su-Fang,Xie, Xiao-Xun,Luo, Guo-Rong Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6
Background: GC-binding factor 2 (GCF2) is a transcriptional regulator that represses transcriptional activity of the epidermal growth factor receptor (EGFR) by binding to a specific GC-rich sequence in the EGFR gene promoter. In addition to this function, GCF2 has also been identified as a tumor-associated antigen and regarded as a potentially valuable serum biomarker for early human hepatocellular carcinoma (HCC) diagnosis. GCF2 is high expressed in most HCC tissues and cell lines including HepG2. This study focused on the influence of GCF2 on cell proliferation and apoptosis in HepG2 cells. Materials and Methods: GCF2 expression at both mRNA and protein levels in HepG2 cells was detected with reverse transcription (RT) PCR and Western blotting, respectively. RNA interference (RNAi) technology was used to knock down GCF2 mRNA and protein expression. Afterwards, cell viability was analyzed with a Cell Counting Kit-8 (CCK-8), and cell apoptosis and caspase 3 activity by flow cytometry and with a Caspase 3 Activity Kit, respectively. Results: Specific down-regulation of GCF2 expression caused cell growth inhibition, and increased apoptosis and caspase 3 activity in HepG2 cells. Conclusions: These primary results suggest that GCF2 may influence cell proliferation and apoptosis in HepG2 cells, and also provides a molecular basis for further investigation into the possible mechanism at proliferation and apoptosis in HCC.
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