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Yan Feng,Yanzhen Yu,Liping Qiu,Yawen Yang,Zhigang Li,Miaowan Li,Lisha Fan,Yuzhong Guo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Haydite and sorption functional media (SFM),made of clinoptilolite tailings, were used as filter media forbiological aerated filter (BAF) to treat synthetic wastewater in parallel. The aim of this work was toevaluate impact of SFM on the removal of ammonia nitrogen in a biological aerated filter reactor underammonium nitrogen shock loads. It could be demonstrated that: (1) the BAF with SFMpresented higherammonia nitrogen removal efficiency than that with haydite; (2) during the phase of higher influentconcentrations SFMs were collecting ammonia nitrogen and can buffer ammonia nitrogen loads anddampen the effluent concentration of ammonia nitrogen; (3) when the influent concentration decreasesammonia nitrogen will desorb from the SFM and can be utilized by the nitrifying bacteria growing on theSFM. Therefore, with the SFM application existing BAF unites can be upgraded and the stability of theoperation process of BAF can be improved significantly.
The characteristics and application of grain-slag media in a biological aerated filter (BAF)
Yan Feng,Liping Qiu,Jianwei Zhang,Longlong Gao,Yanzhen Yu 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.3
Novel filter media-grain slag particles were prepared using waste material-grain slag, clay and poreforming material with a mass ratio of 3:2:1. Compared with haydite, grain-slag had higher total porosity,larger total surface area and lower bulk and apparent density. Tests of heavy metal elements in lixivium proved that grain-slag were safe for wastewater treatment. In order to ascertain the application of grainslag,grain-slag and haydite were applied as the media of biological aerated filters (BAF) to treat municipal wastewater in two lab scale upflow BAFs. The results showed that grain-slag reactor brought a relative superiority to haydite reactor in terms of chemical oxygen demand (CODcr) and ammonia nitrogen (NH3-N) removal at the conditions of water temperature ranging from 20 8C to 26 8C and DO 4.00 mg L1 when hydraulic retention time (HRT) ranging from 1 h to 5 h. In addition, the detection of the amount of hetero bacteria and nitrobacteria of two biological aerated filters in three HRTs also showed that grain-slag medium was more suitable to the attached growth of nitrobacteria, which is helpful to the improvement of nitrification performance in grain-slag BAF. Therefore, grain-slag application in BAF, as a novel process of treating wastes with wastes, provided a promising way in grain slag waste material utilization.
TP53I11 suppresses epithelial-mesenchymal transition and metastasis of breast cancer cells
( Tongqian Xiao ),( Zhongjuan Xu ),( Hai Zhang ),( Junsa Geng ),( Yong Qiao ),( Yu Liang ),( Yanzhen Yu ),( Qun Dong ),( Guangli Suo ) 생화학분자생물학회 2019 BMB Reports Vol.52 No.6
Epithelial-mesenchymal transition (EMT) is widely-considered to be a modulating factor of anoikis and cancer metastasis. We found that, in MDA-MB-231 cells, TP53I11 (tumor protein P53 inducible protein 11) suppressed EMT and migration in vitro, and inhibited metastasis in vivo. Our findings showed that hypoxic treatment upregulated the expression of HIF1α, but reduced TP53I11 protein levels and TP53I11 overexpression reduced HIF1α expression under normal culture and hypoxicconditions, and in xenografts of MDA-MB-231 cells. Considering HIF1α is a master regulator of the hypoxic response and that hypoxia is a crucial trigger of cancer metastasis, our study suggests that TP53I11 may suppress EMT and metastasis by reducing HIF1α protein levels in breast cancer cells. [BMB Reports 2019; 52(6): 379-384]
( Zhe Shi ),( Liyuan Zhou ),( Yan Zhou ),( Xiaoyan Jia ),( Xiangjun Yu ),( Xiaohong An ),( Yanzhen Han ) 생화학분자생물학회 2022 BMB Reports Vol.55 No.6
Chloride channel-5 (ClC-5), an important branch of the ClC family, is involved in the regulation of the proliferation and cell-fate of a variety of cells, including tumor cells. However, its function in cholangiocarcinoma (CCA) cells remains enigmatic. Here, we discovered that ClC-5 was up-regulated in CCA tissues and CCA cell lines, while ClC-5 silencing inhibited CCA cell proliferation and induced apoptosis. Further mechanism studies revealed that ClC-5 inhibition could inhibit Wnt/β-catenin signaling activity and further activate the mitochondria apoptotic pathway in CCA cells. Furthermore, rescuing Wnt/β-catenin signaling activation eliminated the anti-tumor function of ClC-5 knockdown. Together, our research findings illustrated that ClC-5 inhibition plays an anti-tumor role in CCA cells via inhibiting the activity of the Wnt/β-catenin pathway, which in turn activates the mitochondrial apoptotic pathway. [BMB Reports 2022; 55(6): 299-304]
Ke Huang,Youping Yi,Shiquan Huang,Hailin He,Fei Dong,Yunfan Fu,Yanzhen Jia,Wenwen Yu 대한금속·재료학회 2024 METALS AND MATERIALS International Vol.30 No.5
The temperature–time-property (TTP) curve of the cryogenic deformed 6061 aluminum alloy was fitted in this study, and thesensitive temperature range was determined through interrupted quenching experiments. The precipitation behavior duringisothermal treatment of the cryogenic deformed samples was observed and analyzed by the differential scanning calorimetry(DSC), optical microscope (OM), and transmission electron microscope (TEM), and the premature precipitation mechanismduring isothermal treatment was discussed in detail. The results revealed that the critical time for a 5% drop in hardness atthe nose temperature (400 °C) was 25.2 s. Furthermore, the sensitive temperature range was determined to be from 360 to420 °C. At 400 ℃, the supersaturated solution transformation rate reached its maximum, and coarse β equilibrium phaseswere rapidly precipitated in the grain. However, when the temperature was outside the sensitive range, the transformationrate decreased, and several β" and β′ phases were observed, indicates a lower degree of premature precipitation of the alloy. The high sensitivity at nose temperature can be attributed to the relatively high nucleation and growth rates of phases. Basedon the experimental results, the cooling rate at the sensitive temperature range should be increased, while the cooling ratefrom the solution temperature to 420 °C should be properly decreased during the quenching process to obtain relatively highmechanical properties and low residual stresses.
Yan, Zhen,Ma, Yu Zhen,Liu, Dong jun,Cang, Ming,Wang, Rui,Bao, Shorgan Asian Australasian Association of Animal Productio 2010 Animal Bioscience Vol.23 No.4
RNA interference (RNAi) is an acknowledged useful and effective tool to study gene function in various cells. Here, we suppressed the Connexin 43 (Cx 43) gene expression during in vitro development of ovine pre-implantation embryos using the RNAi method. The 353 bp Cx 43 double-stranded RNA was microinjected into in vitro fertilized ovine zygotes, and the levels of target mRNA and protein were investigated. Control groups included uninjected zygotes or those injected with RNase-free water. The dsRNA injection resulted in the specific reduction of Cx 43 transcripts as analyzed by quantitative real-time RT-PCR and decreased protein levels as shown by Western blot analysis at the blastocyst stage. Microinjection of Cx 43 dsRNA led to 20.3%, 21.7% and 34.5% blastocyst rates and 19.2%, 37.5% and 41.3% hatched blastocyst rates in Cx 43 dsRNA-injected, water-injected and uninjected groups, respectively. Then the RNAi could not significantly affect cell number and cell death rates of blastocysts. Therefore, suppression of Cx 43 dsRNA and proteins did not apparently affect the development potential of ovine pre-implantation embryos but may play a role in embryo quality. RNAi technology is a promising approach to study gene function in early ovine embryogenesis.