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Yong-Gui Chen,Yong He,Wei-min Ye,Ling-Yan Jia 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The competitive adsorption of Na(I)/Cr(III) and Cr(III)/Cu(II) on GMZ bentonite was studied by batch experiments. The results show that the bentonite has larger total adsorption amount of Cu(II) and Cr(III) in binary ions solution compared to that of single ion solution. Increasing of Na(I) concentration reduces the adsorption capacity of Cr(III) in their binary solution. The phenomenon Cr(III) has a lager adsorption than Cu(II) indicate that the adsorption capacity of Cu(II) is inhibited in their binary solution. The sequence of distribution coefficients (Kd) in the solution as follow: Kd binary (Cr) > Kd single (Cu) > Kd single (Cr) > Kd binary (Cu).
Bisorption of Organic Compounds by Spirulina Subsalsa
Chen, Yong-Sheng,Zhuang, Yuan-Yi,Dai, Shu-Gui CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.1
In this paper, the biosorption of 13 organic compounds was investigated by using biomass of nonliving, dried algae Spirulina subsalsa as sorbent. The results showed that: the biosorption of `13 organic compounds could be described by the Freundlich isoterm. The isoterm binding constants suggested that the biosorption capacity series was phenlo > o-dihydroxy benzene > p-dihydroxy benzene > o-aminophenol > chlorophenol > 2,4-dichlorophenol for 6 phenolic compounds and alkaline blue BO > active blue KN-R > acidic red 4BS > black G > brown MM > blue 5B > black ATT for 7 dyes. The biosorption constants (lgk) of above 6 phenolic compounds showed a good linear correlation to their molecular connectivity index. Keywords: biosorption, biosorbent, phenolic compounds, dye, algae, Spirulina subsalsa, molecular commectivity index
( Gui Zi Ye ),( Min Jiang ),( Jian Li ),( Ke Quan Chen ),( Yong Lan Xi ),( Shu Wen Liu ),( Ping Wei ),( Ping Kai Ouyang ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.8
Actinobacillus succinogenes, a representative succinic-acid-producing microorganism, is seriously inhibited by ammonium ions, thereby hampering the industrial use of A. succinogenes with ammonium-ion-based materials as the pH controller. Therefore, this study isolated an ammonium-ion-tolerant mutant of A. succinogenes using a continuous-culture technique in which all the environmental factors, besides the stress (ammonium ions), were kept constant. Instead of operating the mutant-generating system as a nutrient-limited chemostat, it was used as a nutrientunlimited system, allowing the cells to be continuously cultured at the maximum specific growth rate. The mutants were isolated on agar plates containing the acid-base indicator bromothymol blue and a high level of ammonium ions that would normally kill the parent strain by 100%. When cultured in anaerobic bottles with an ammonium ion concentration of 354 mmol/l, the mutant YZ0819 produced 40.21 g/l of succinic acid with a yield of 80.4%, whereas the parent strain NJ113 was unable to grow. When using NH4OH to buffer the culture pH in a 3.0 l stirred bioreactor, YZ0819 produced 35.15 g/l of succinic acid with a yield of 70.3%, which was 155% higher than that produced by NJ113. In addition, the morphology of YZ0819 changed in the fermentation broth, as the cells were aggregated from the beginning to the end of the fermentation. Therefore, these results indicate that YZ0819 can efficiently produce succinic acid when using NH4OH as the pH controller, and the formation of aggregates can be useful for transferring the cells from a cultivation medium for various industrial applications.
Endothelial Aquaporin-1 (AQP1) Expression Is Regulated by Transcription Factor Mef2c
Yong Jiang,He Liu,Wen-jing Liu,Hai-bin Tong,Chang-jun Chen,Fu-gui Lin,Yan-hang Zhuo,Xiao-zhen Qian,Zeng-bin Wang,Yu Wang,Peng Zhang,Hong-liang Jia 한국분자세포생물학회 2016 Molecules and cells Vol.39 No.4
Aquaporin 1 (AQP1) is expressed in most microvascula-ture endothelial cells and forms water channels that play major roles in a variety of physiologic processes. This study aimed to delineate the transcriptional regulation of AQP1 by Mef2c in endothelial cells. Mef2c cooperated with Sp1 to activate human AQP1 transcription by binding to its proximal promoter in human umbilical cord vein endothelial cells (HUVEC). Over-expression of Mef2c, Sp1, or Mef2c/Sp1 increased HUVEC migration and tube-forming ability, which can be abolished AQP1 knockdown. These data indicate that AQP1 is a direct target of Mef2c in regulating angiogenesis and vasculogenesis of endothelial cells.
Investigation of surface pressures on CAARC tall building concerning effects of turbulence
Yong-gui Li,Jiahui Yan,Xinzhong Chen,Qiu-sheng Li,Yi Li 한국풍공학회 2020 Wind and Structures, An International Journal (WAS Vol.31 No.4
This paper presents an experimental investigation on the surface pressures on the CAARC standard tall building model concerning the effects of freestream turbulence. Two groups of incidence turbulence are generated in the wind tunnel experiment. The first group has an approximately constant turbulence intensity of 10.3% but different turbulence integral scale varying from 0.141 m to 0.599 m or from 0.93 to 5.88 in terms of scale ratio (turbulence integral scale to building dimension). The second group presents similar turbulence integral scale but different turbulence intensity ranging from 7.2% to 13.5%. The experimental results show that the mean pressure coefficients on about half of the axial length of the side faces near the leading edge slightly decrease as the turbulence integral scale ratio that is larger than 4.25 increases, but respond markedly to the changes in turbulence intensity. The root-mean-square (RMS) and peak pressure coefficients depend on both turbulence integral scale and intensity. The RMS pressure coefficients increase with turbulence integral scale and intensity. As the turbulence integral scale increases from 0.141 m to 0.599 m, the mean peak pressure coefficient increases by 7%, 20% and 32% at most on the windward, side faces and leeward of the building model, respectively. As the turbulence intensity increases from 7.2% to 13.5%, the mean value of peak pressure coefficient increases by 47%, 69% and 23% at most on windward, side faces and leeward, respectively. The values of cross-correlations of fluctuating pressures increase as the turbulence integral scale increases, but decrease as turbulence intensity increases in most cases.
Endothelial Aquaporin-1 (AQP1) Expression Is Regulated by Transcription Factor Mef2c
Jiang, Yong,Liu, He,Liu, Wen-jing,Tong, Hai-bin,Chen, Chang-jun,Lin, Fu-gui,Zhuo, Yan-hang,Qian, Xiao-zhen,Wang, Zeng-bin,Wang, Yu,Zhang, Peng,Jia, Hong-liang Korean Society for Molecular and Cellular Biology 2016 Molecules and cells Vol.39 No.4
Aquaporin 1 (AQP1) is expressed in most microvasculature endothelial cells and forms water channels that play major roles in a variety of physiologic processes. This study aimed to delineate the transcriptional regulation of AQP1 by Mef2c in endothelial cells. Mef2c cooperated with Sp1 to activate human AQP1 transcription by binding to its proximal promoter in human umbilical cord vein endothelial cells (HUVEC). Over-expression of Mef2c, Sp1, or Mef2c/Sp1 increased HUVEC migration and tube-forming ability, which can be abolished AQP1 knockdown. These data indicate that AQP1 is a direct target of Mef2c in regulating angiogenesis and vasculogenesis of endothelial cells.
Xin, Yong,Wang, Jia-Yang,Li, Liang,Tang, Tian-You,Liu, Gui-Hong,Wang, Jian-She,Xu, Yu-Mei,Chen, Yong,Zhang, Long-Zhen Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3
Objective: To make sure the feasibility with $^{18F}FDG$ PET/CT to guided dynamic intensity-modulated radiation therapy (IMRT) for nasopharyngeal carcinoma patients, by dosimetric verification before treatment. Methods: Chose 11 patients in III~IVA nasopharyngeal carcinoma treated with functional image-guided IMRT and absolute and relative dosimetric verification by Varian 23EX LA, ionization chamber, 2DICA of I'mRT Matrixx and IBA detachable phantom. Drawing outline and making treatment plan were by different imaging techniques (CT and $^{18F}FDG$ PET/CT). The dose distributions of the various regional were realized by SMART. Results: The absolute mean errors of interest area were $2.39%{\pm}0.66$ using 0.6cc ice chamber. Results using DTA method, the average relative dose measurements within our protocol (3%, 3 mm) were 87.64% at 300 MU/min in all filed. Conclusions: Dosimetric verification before IMRT is obligatory and necessary. Ionization chamber and 2DICA of I'mRT Matrixx was the effective dosimetric verification tool for primary focal hyper metabolism in functional image-guided dynamic IMRT for nasopharyngeal carcinoma. Our preliminary evidence indicates that functional image-guided dynamic IMRT is feasible.
Influence of CeO2 morphology on the catalytic oxidation of ethanol in air
Guilin Zhou,Baoguo Gui,Hongmei Xie,Fang Yang,Yong Chen,Shengming Chen,Xuxu Zheng 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
Nano-CeO2 catalysts of different shapes were synthesized at different hydrothermal crystallizationtemperatures from an alkaline aqueous solution. X-ray diffraction (XRD), transmission electronmicroscope (TEM), and H2 temperature-programmed reduction (H2-TPR) were used to study thesynthesized nano-CeO2 catalyst samples. The catalytic properties of the prepared nano-CeO2 catalystsfor the catalytic oxidation of ethanol in air were also investigated. TEM analysis showed that CeO2nanorod and nanocube catalysts have been synthesized at hydrothermal crystallization temperatures of373 K and 453 K, respectively. XRD results showed that the synthesized nano-CeO2 catalysts have similarcubic fluorite structures. H2-TPR results indicated that CeO2 nanorod and nanocube catalysts exhibitdifferent reduction behaviors for H2 and that the nanorod catalyst has better low-temperature reductionperformance than the nanocube catalyst. Ethanol catalytic oxidation results indicated that oxidation andcondensation products (including acetaldehyde, acetic acid, CO2, and ethyl acetate) have been producedfrom the prepared catalysts. The ethyl acetate and acetic acid can be ignited by ethanol at lowtemperature on the CeO2(R) catalyst to give low catalytic combustion temperature for ethyl acetate andacetic acid molecules. CeO2 nanorods gave ethanol oxidation conversion rates above 99.2% at 443 K andCO2 selectivity exceeding 99.6% at 483 K, while CeO2 nanocubes gave ethanol oxidation conversion ratesof about 95.1% until 508 K and CO2 selectivity of only 93.86% at 543 K. CeO2 nanorod is a potential lowcostand effective catalyst for removing trace amounts of ethanol to purify air.