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RISS 인기검색어
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- 저자 : ( Ming-hong Ke ) (검색결과 10 건)
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Ke-Cheng Yang,Li-Hui Xu,Hong Pan,Li-Ming Wang,Yong Shen,Ying Ding 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2020 NANO Vol.15 No.03
In this study, CuS/SiO2 composite modified aerogel was prepared by the incorporation of hollow spherical CuS into methyltrimethoxysilane-based SiO2 sol and modification with hexadeca-fluorodecyltriethoxysilane via acid-base catalyzed sol–gel reaction and drying under ambient pressure. The CuS/SiO2 composite modified aerogel was characterized by Fourier-transform infrared (FT-IR) spectrometry, scanning electron microscope (SEM), nitrogen gas adsorption and desorption and X-ray diffraction (XRD), respectively. The effects of CuS and fluorosilane concentration on density and porosity of aerogel, oleophobic and photocatalytic properties were evaluated. The results showed that structure and physical properties of aerogel had some effect by introducing CuS and fluorosilane, and the CuS/SiO2 composite modified aerogel with density of 0.146 g/cm3 and specific surface area of 241 m2/g achieved super-oleophobicity with oil contact angle of 152.8fl and sliding angle of 10fl, and good photocatalytic properties for methylene blue.
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Ke-Cheng Yang,Li-Hui Xu,Hong Pan,Li-Ming Wang,Yong Shen,Ying Ding 한국섬유공학회 2020 Fibers and polymers Vol.21 No.6
In this work, solid spherical and hollow spherical CuS were prepared by microwave assisted method withPEG4000 as dispersant. The CuS was characterized by particle size analysis, scanning electron microscope(SEM), nitrogenadsorption and desorption, and X-ray diffraction (XRD), respectively. The effects of PEG4000, ratio of thiourea: copper, andmicrowave power on particle size of CuS were discussed, and the effects of particle size on photocatalytic property wereevaluated. The solid spherical CuS had average particle size of 189.1 nm and specific surface of 9.54 m2/g. The hollowspherical CuS had average particle size of 502.7 nm and specific surface area of 16.01 m2/g. The results showed the hollowspherical CuS had better photocatalytic property. In addition, the cotton fabric was treated by hollow spherical CuS/polydimethylsiloxane (PDMS) to prepare multifunctional textile in this work. The treated cotton fabric was characterized bySEM. The treated cotton fabric achieved the superhydrophobicity with contact angle of 156.9 o and sliding angle of 8 o, goodphotocatalytic properties for methylene blue, and exceptional UV resistance with UPF of 223.52.
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Jian Zhou,Hong Yu Li,Ke-Ming Chen,De Juan Zhi,Qin-Jian Xie,Cory J. Xian 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.12
Iron pyrite, an important component of traditional Chinese medicine, has a poor solubility, bioavailability, and patient compliance due to a high dose required and associated side effects, all of which have limited its clinical applications and experimental studies on its action mechanisms in improving fracture healing. This study investigated Acidithiobacillus ferrooxidans (A.f)-bioleaching of two kinds of pyrites and examined bioactivities of the derived solutions in viability and osteogenic differentiation in rat calvarial osteoblasts. A.f bioleaching improved element contents (Fe, Mn, Zn, Cu, and Se) in the derived solutions and the solutions concentration-dependently affected osteoblast viability and differentiation. While the solutions had no effects at low concentrations and inhibited the osteoblast alkaline phosphatase (ALP) activity at high concentrations, they improved ALP activity at their optimal concentrations. The improved osteoblast differentiation and osteogenic function at optimal concentrations were also revealed by levels of ALP cytochemical staining, calcium deposition, numbers and areas of mineralized nodules formed, mRNA and protein expression levels of osteogenesis-related genes (osteocalcin, Bmp-2, Runx-2, and IGF-1), and Runx-2 nuclear translocation. Data from this study will be useful in offering new strategies for improving pyrite bioavailability and providing a mechanistic explanation for the beneficial effects of pyrite in improving bone healing.
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The Age-Related Orientational Changes of Human Semicircular Canals
Hui-Ying Lyu,Ke-Guang Chen,Dong-Ming Yin,Juan Hong,Lin Yang,Tian-yu Zhang,Peidong Dai 대한이비인후과학회 2016 Clinical and Experimental Otorhinolaryngology Vol.9 No.2
Objectives. Some changes are found in the labyrinth anatomy during postnatal development. Although the spatial orientation of semicircular canals was thought to be stable after birth, we investigated the age-related orientational changes of human semicircular canals during development. Methods. We retrospectively studied the computed tomography (CT) images of both ears of 76 subjects ranged from 1 to 70 years old. They were divided into 4 groups: group A (1–6 years), group B (7–12 years), group C (13–18 years), and group D (>18 years). The anatomical landmarks of the inner ear structures were determined from CT images. Their coordinates were imported into MATLAB software for calculating the semicircular canals orientation, angles between semicircular canal planes and the jugular bulb (JB) position. Differences between age groups were analyzed using multivariate statistics. Relationships between variables were analyzed using Pearson analysis. Results. The angle between the anterior semicircular canal plane and the coronal plane, and the angle between the horizontal semicircular canal plane and the coronal plane were smaller in group D than those in group A (P<0.05). The JB position, especially the anteroposterior position of right JB, correlated to the semicircular canals orientation (P<0.05). However, no statistically significant differences in the angles between ipsilateral canal planes among different age groups were found. Conclusion. The semicircular canals had tendencies to tilt anteriorly simultaneously as a whole with age. The JB position correlated to the spatial arrangement of semicircular canals, especially the right JB. Our calculation method helps detect developmental and pathological changes in vestibular anatomy.
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Gambogenic Acid Induction of Apoptosis in a Breast Cancer Cell Line
Zhou, Jing,Luo, Yan-Hong,Wang, Ji-Rong,Lu, Bin-Bin,Wang, Ke-Ming,Tian, Ye Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12
Background: Gambogenic acid is a major active compound of gamboge which exudes from the Garcinia hanburyi tree. Gambogenic acid anti-cancer activity in vitro has been reported in several studies, including an A549 nude mouse model. However, the mechanisms of action remain unclear. Methods: We used nude mouse models to detect the effect of gambogenic acid on breast tumors, analyzing expression of apoptosis-related proteins in vivo by Western blotting. Effects on cell proliferation, apoptosis and apoptosis-related proteins in MDA-MB-231 cells were detected by MTT, flow cytometry and Western blotting. Inhibitors of caspase-3,-8,-9 were also used to detect effects on caspase family members. Results: We found that gambogenic acid suppressed breast tumor growth in vivo, in association with increased expression of Fas and cleaved caspase-3,-8,-9 and bax, as well as decrease in the anti-apoptotic protein bcl-2. Gambogenic acid inhibited cell proliferation and induced cell apoptosis in a concentration-dependent manner. Conclusion: Our observations suggested that Gambogenic acid suppressed breast cancer MDA-MB-231 cell growth by mediating apoptosis through death receptor and mitochondrial pathways in vivo and in vitro.
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Fang, Wei-Jia,Zheng, Yi,Wu, Li-Ming,Ke, Qing-Hong,Shen, Hong,Yuan, Ying,Zheng, Shu-Sen Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5
Background: Colorectal cancer is one of the leading causes of mortality worldwide. Genome wide analysis studies have identified sequence mutations causing loss-of-function that are associated with disease occurrence and severity. Epigenetic modifications, such DNA methylation, have also been implicated in many cancers but have yet to be examined in the East Asian population of colorectal cancer patients. Methods: Biopsies of tumors and matched non-cancerous tissue types were obtained and genomic DNA was isolated and subjected to the bisulphite conversion method for comparative DNA methylation analysis on the Illumina Infinium HumanMethylation27 BeadChip. Results: Totals of 258 and 74 genes were found to be hyper- and hypo-methylated as compared to the individual's matched control tissue. Interestingly, three genes that exhibited hypermethylation in their promoter regions, CMTM2, ECRG4, and SH3GL3, were shown to be significantly associated with colorectal cancer in previous studies. Using heatmap cluster analysis, eight hypermethylated and 10 hypomethylated genes were identified as significantly differentially methylated genes in the tumour tissues. Conclusions: Genome-wide methylation profiling facilitates rapid and simultaneous analysis of cancerous cells which may help to identify methylation markers with high sensitivity and specificity for diagnosis and prognosis. Our results show the promise of the microarray technology in identification of potential methylation biomarkers for colorectal cancers.
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Simulation and Analysis on Desulfurization of Biogas using Iron Oxide Particles
( Cheng-chang Lien ),( Min-wei Wang ),( Ming-hong Ke ),( Tong-bao Zhang ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Biogas has a great potential for renewable energy, it contained with hydrogen sulfide which can cause metal equipment corrosion. Therefore the Hydrogen sulfide must be remove before uses biogas, in order to remove hydrogen sulfide in biogas that let biogas passed through the desulfurization column during field application. Inside of the desulfurization column has the certain height of iron oxide particles, Hydrogen sulfide in biogas will generates adsorption reaction on the surface of the iron oxide particles and forms iron sulfide to achieve the purpose of biogas purification. The purpose of this study uses computational fluid dynamics (CFD) numerical simulation to simulate the desulfurization column at a certain amount of biogas to obtain the pressure between the inlet and the outlet of the desulfurization column, and also obtained the airflow velocity profile inside the desulfurization column. The results of this simulation are compared with the actual measured pressure data, it shows that both have a good consistency. For further, improve the upper end of the exit of the desulfurization column to an inverted funnel shape for comparative analysis, it found that the flow in the inverted funnel at the top of the desulfurization column has obviously slowed down which means the sudden contraction (sudden unremitting). This result will provide help to improve a uniformity of the air velocity in the non-central region of the desulfurization column, in order to promote the iron oxide particles of its effective utilization of biogas desulfurization.
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Xue-Lin Wang,Ding-Yu Shen,Gang Fu,Hong-Ji Ma,Ke-Ming Wang,Rui Nie,Shi-Ling Li 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
A barrier planar waveguide was fabricated in z-cut LiNbdO3 crystals by 4.5-MeV lithium ion implantation at a dose of 3 £ 1014 ions/cm2 at room temperature. Dark modes were observed by the prism-coupling method with wavelengths of both 633 nm and 1539 nm. The refractive index pro¯les were reconstructed by using the re°ectivity calculation method. There were about 1.1 % and 0.7 % decreases at the optical barriers of the ordinary and extraordinary refractive index at the wavelength at 633 nm, and the positions of the optical barriers were close to those of the damage peaks calculated by the TRIM098 (Transport of Ions in Matter) code. It is found that the refractive index change may be partly due to the damage induced by nuclear collision.
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