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TING-TING ZHANG,TING-TING GUO,ZHI-PING WU,SI-WEI YANG,ZHOU-FENG WANG,FANG LIAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.5
In this paper, a new simple approach has been developed for the preparation of α-Fe2O3 microspheres by a facile hydrothermal method using PVP as a surfactant. Uniform α-Fe2O3 microspheres could be routinely synthesized through solvothermal approach by controlling the PVP/FeCl3⋅6H2O ratio. The as-obtained α-Fe2O3 microspheres exhibit high efficiency on the decolorization of RhB aqueous solution in the presence of H2O2 at room temperature.
Zhou, Zhi-ting,Fan, Zhen-nan,Li, Jian-fu,Wen, Kun,Zhang, Bide,Wang, Tao,Xia, Yan-kun,Sun, Zhang,Yao, Bing The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
A field-circuit coupling model of a typical faulty generator is established to correct through-bolt end-region overheating and breakdown failure in a tubular hydro-generator. Using the model, eddy current loss and electromagnetic forces on through bolts under normal and failure conditions are analyzed and compared and the natural frequency of a through bolt is determined. Based on the analysis results, the causative mechanism of failure is revealed and targeted improvement design measures are proposed. The numerical results are found to be consistent with the actual fault characteristics, validating the design measure improvements. The results are useful in improving the design and manufacturing standards and enhancing the operational reliability of large tubular hydro-generators.
Zhi-ting Zhou,Zhen-nan Fan,Jian-fu Li,Kun Wen,Bide Zhang,Tao Wang,Yan-kun Xia,Zhang Sun,Bing Yao 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
A field-circuit coupling model of a typical faulty generator is established to correct through-bolt end-region overheating and breakdown failure in a tubular hydro-generator. Using the model, eddy current loss and electromagnetic forces on through bolts under normal and failure conditions are analyzed and compared and the natural frequency of a through bolt is determined. Based on the analysis results, the causative mechanism of failure is revealed and targeted improvement design measures are proposed. The numerical results are found to be consistent with the actual fault characteristics, validating the design measure improvements. The results are useful in improving the design and manufacturing standards and enhancing the operational reliability of large tubular hydrogenerators.
Abietane Diterpenoids from Perovskia atriplicifolia and Their Anti-HBV Activities
Zhi-Yong Jiang,Zhong-Qiu Li,Chao-Guan Huang,Jun Zhou,Qiu-Fen Hu,Wen-Xing Liu,Xiang-Zhong Huang,Wei Wang,Li-Zhu Zhang,Fu-Ting Xia 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.2
Bioassay-guided phytochemical investigation on the 90% EtOH extract of Perovskia atriplicifolia resulted in the isolation of eight abietane diterpenoids, including three new ones (1–3). Based on spectroscopic methods involving 1D and 2D NMR spectroscopy techniques, mass spectrometry, and optical rotation, the structures of the new compounds (1–3) were unambiguously characterized. Compounds 1–2 and 4–8 were evaluated for their anti-HBV (hepatitis B virus) activity in HepG 2.2.15 cell line. Results suggested rosmadial (8) had the most anti-HBV potency, suppressing the secretion of HBsAg and HBeAg, with IC50 values of 0.09 and 0.34 mM, respectively.
Calculating Method Study and Parameter Analysis of Slender LCFST Columns Under Axial Loading
Ting Zhou,Ziyang Ren,Baoqi Jiang,Minyang Xu,Zhiyong Lei,Zhi-Hua Chen 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.5
L-shaped columns composed of concrete-fi lled steel tubes (LCFST columns) connected by steel plates, which are important component to make sure the mono-column working together, were investigated under axial loading experiment with diff erent width and thickness of connection plates. The relationships between load and longitudinal displacement, lateral displacement, longitudinal strains and transverse strains as well as failure mode are presented. Load carrying capacity of LCFST columns increased with the width and thickness of the connection plates increasing. In addition, the integrity of the specimen was improved with increase of thickness and decrease of width of the connection plates. Failure modes obtained from the fi nite element model were consistent with the phenomenon observed in the test. Besides, the parameters of slenderness ratio, dimensions of connection plate, and transverse stiff ener spacing were analyzed. Finally, the calculating method of yield bearing capacity of axial compression was proposed based on the former analysis.
Zhi-hao Li,Bin Zhou,Xiu-ting Li,Shu-gang Li 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.1
In this current study, comparative study betweenthe effect of electrolyzed water and ultrapure water on theextraction of apricot protein was conducted. The resultsrevealed that under the condition of same pH (pH = 9.5),the extraction efficiency of electrolyzed water on apricotprotein was superior to that of ultrapure water. Moreover,apricot protein (EAP) extracted by electrolyzed water displayedpreferable foaming capacity and emulsion stability. The foaming capacity and emulsion stability of EAP were11.17% and 36.33 min, for UAP, only 4.75% and23.88 min, respectively. Meanwhile, compared to UAP,the secondary structure of EAP was more orderly, in whichthe orderly structures of a-helix and b-sheet were 7.5 and60.2%, while the disorderly structures of b-turn and randomcoil were 8.4 and 23.8%. This work provided a novelextraction strategy, which could improve the extractionrate and minimize the destruction of the structure andfunctional properties of apricot protein.
Establishing a Nomogram for Stage IA-IIB Cervical Cancer Patients after Complete Resection
Zhou, Hang,Li, Xiong,Zhang, Yuan,Jia, Yao,Hu, Ting,Yang, Ru,Huang, Ke-Cheng,Chen, Zhi-Lan,Wang, Shao-Shuai,Tang, Fang-Xu,Zhou, Jin,Chen, Yi-Le,Wu, Li,Han, Xiao-Bing,Lin, Zhong-Qiu,Lu, Xiao-Mei,Xing, H Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.9
Background: This study aimed to establish a nomogram by combining clinicopathologic factors with overall survival of stage IA-IIB cervical cancer patients after complete resection with pelvic lymphadenectomy. Materials and Methods: This nomogram was based on a retrospective study on 1,563 stage IA-IIB cervical cancer patients who underwent complete resection and lymphadenectomy from 2002 to 2008. The nomogram was constructed based on multivariate analysis using Cox proportional hazard regression. The accuracy and discriminative ability of the nomogram were measured by concordance index (C-index) and calibration curve. Results: Multivariate analysis identified lymph node metastasis (LNM), lymph-vascular space invasion (LVSI), stromal invasion, parametrial invasion, tumor diameter and histology as independent prognostic factors associated with cervical cancer survival. These factors were selected for construction of the nomogram. The C-index of the nomogram was 0.71 (95% CI, 0.65 to 0.77), and calibration of the nomogram showed good agreement between the 5-year predicted survival and the actual observation. Conclusions: We developed a nomogram predicting 5-year overall survival of surgically treated stage IA-IIB cervical cancer patients. More comprehensive information that is provided by this nomogram could provide further insight into personalized therapy selection.
Experimental Study on Fire Resistance Performance of Concrete-Filled Steel Plate Composite Walls
Ting Zhou,Xueshan Liu,Hongbo Liu,Yixuan Li,Pengfei Zhang,Huazhou Chen,Zhi-Hua Chen 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.2
Concrete-filled steel plate composite walls are increasingly used in high-rise buildings; their mechanical properties at room temperature have produced fruitful results. However, research on their mechanical properties in fire and at high temperatures is scarce. Moreover, published studies on the fire resistance of concrete-filled steel plate composite walls have not considered the impact of fire protection measures. Based on previous fire resistance research, a fire resistance test was designed in this study for four walls under the combined action of axial compression and a single-sided fire under the ISO-834 standard heating curve. Apart from that, the existing fire protections have the disadvantages of too thick, easy falling off and cracking or difficult to install. In order to eliminate the disadvantages of existing fire prevention measures, new composite fireproof structure using a rock wool board and a thin fire-retardant coating is proposed. The effects of no fireproof structures, autoclaved lightweight concrete plate fireproof structures, thick-coated fire-retardant structures, and new composite fireproof structures on the fire resistance of concrete-filled steel plate composite walls were studied experimentally. The results show that the fire resistance of the four test specimens meets the 3 h fire resistance limit of the primary load-bearing component in the specification. Based on the experimental results, reasonable fire protection methods are suggested for concrete-filled steel plate composite walls in actual projects, and an experimental basis is provided for further numerical simulation.
Zhou, Yu,Yang, Yun-Ling,Fan, Yu-Ting,Yang, Woochul,Zhang, Wei-Bin,Hu, Jian-Feng,Zhang, Zhi-Jun,Zhao, Jing-Tai The Royal Society of Chemistry 2019 Journal of Materials Chemistry C Vol.7 No.26
<P>A series of novel red emitting Mn<SUP>2+</SUP>-activated SrZnSO phosphors were successfully synthesized by solid-state reaction at high temperature. The photoluminescence (PL) and mechanoluminescence (ML) properties of these Mn<SUP>2+</SUP>-activated SrZnSO phosphors with different Mn<SUP>2+</SUP> concentrations were investigated. With increasing the concentration of Mn<SUP>2+</SUP> from <I>x</I> = 0 to 0.04, the unit cell volume increased from 153.82 to 154.19 Å<SUP>3</SUP> while the optical band gap decreased from 3.74 to 3.43 eV. The site occupation of Mn<SUP>2+</SUP> in the host lattice was demonstrated by Rietveld refinement, the electron paramagnetic resonance (EPR) spectrum, and the spectroscopic properties. A broad band emission peak at 603 nm of SrZn1−xMnxSO (0.001 ≤ <I>x</I> ≤ 0.04) with an excitation wavelength of 318 nm was attributed to electronic transitions of Mn<SUP>2+</SUP> from the <SUP>4</SUP>T1(<SUP>4</SUP>G) level to the <SUP>6</SUP>A1(<SUP>6</SUP>S) level. The lifetime of SrZn1−xMnxSO (0.001 ≤ <I>x</I> ≤ 0.04) decreased monotonously from 2.97 to 0.82 ms with increasing Mn<SUP>2+</SUP> concentration. In particular, intense emission of red light from SrZn1−xMnxSO (0.001 ≤ <I>x</I> ≤ 0.04) under compressive load could be observed even with the naked eye, indicating that SrZn1−xMnxSO could be used for stress sensors or stress imaging. There was a linear correlation between the ML intensity and external load in SrZn1−xMnxSO, and the ML intensity could be recovered under UV light irradiation. Considering its advantages of non-destruction, reproducibility, and high ML intensity, SrZn1−xMnxSO might be useful for non-destructive detection of stress.</P>
Experimental Study and Parameter Analysis of L-shaped Composite Column under Axial Loading
Ting Zhou,Minyang Xu,Xiaodun Wang,Zhi-Hua Chen,Ying Qin 한국강구조학회 2015 International Journal of Steel Structures Vol.15 No.4
A special-shaped column composed of concrete-filled steel tubes (SCFST column) is experimentally investigated in this paper. The SCFST column is composed of several small-sized concrete-filled square tubular columns (mono-columns) connected by connection plates. This kind of column is proposed because it can increase the usable space in residential buildings. The axial loading behavior of L-shaped SCFST columns is experimentally investigated. The failure mode, strain distribution, cooperation of mono-columns, bearing capacity, and the effect of a concrete core on column behavior were tested. As concluded, the SCFST column can be regarded as a useful kind of column. A finite element analysis model was proposed according to the experimental results, and the influence of connection plate size on bearing capacity was studied using the finite element model. Finally, proposed were the optimal width and thickness of connection plates for improving the design of the SCFST column.