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Mei-Fang Chen,Yuan Yuan Zhang,Mei Di He,Cheng Yong Li,Chun Xia Zhou,Peng Zhi Hong,Zhong-Ji Qian 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.2
Marine microalgae have been widely applied in cosmaceuticals, nutraceuticals, and functional foods. In the present study, we first investigated the hepatoprotective effects of peptide purified from microalgae, Isochrysis zhanjiangensis on HepG2 cells alcoholic injury. I. zhanjiangensis was hydrolyzed utilizing chymotrypsin, trypsin, pepsin, and by vitro gastrointestinal digestion. Among hydrolysates, the gastrointestinal hydrolysate showed relatively high free radical scavenging ability preliminarily and was purified with following sequential chromatography methods. The amino acid sequence and molecular mass of the purified peptide from I. zhanjiangensis (PIZ) was identified as Asn-Asp-Ala-Glu-Tyr-Gly-Ile-Cys-Gly-Phe (NDAEYGICGF; MW, 1088.16 Da) via Q-TOF ESI/MS. Additionally, PIZ attenuated ethanol-induced cytotoxicity and inhibited the production of intracellular reactive oxygen species by DCFH-DA assay. Western blot results showed that superoxide dismutase (SOD) and glutathione (GSH) levels up-regulated with PIZ treatment before alcohol exposure while gamma-glutamyltransferase (GGT) protein expression down-regulated. These results provide an opportunity to discover new highly active peptide against alcohol toxicity in HepG2 cells.
End-to-end Service Assurance in 5G Crosshaul Networks
Che-Chun Teng,Mei-Chun Chen,Min-Han Hung,Hong-Jie Chen 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09
More and more telecom operators around the world began to build and to deploy fifth-generation (5G) mobile networks. With the advent of 5G service scenarios, it brings new challenges and increases the complexity of management. To deliver good quality of experience of these 5G applications for customers, service assurance is important. In this paper, we propose an end-to-end service assurance solution for 5G crosshaul networks. The 5G crosshaul network architecture consists of fronthaul, midhaul, and backhaul networks. Our solution deployed in 5G trial network in Chunghwa Telecom in Taiwan. The solution focus on slicing service assurance and synchronization monitoring. Besides, our solution adjusts most of network management in the operation support system (OSS) to apply to 5G crosshaul network. Our goal is to provide stable 5G transport network and to assure quality of experience for customers.
Mei-Feng Lai,Chen-Hung Huang,Ching-Wen Lou,Yu-Chun Chuang,Cyun-Yu Wei,Jia-Horng Lin 한국섬유공학회 2022 Fibers and polymers Vol.23 No.3
In this study, polypropylene (PP) and multi-walled carbon nanotubes (MWCNTs) are used to coat stainless steel(SS) wrapped yarns, the product of which is then fabricated into conductive textiles. Afterwards, the tensile properties,surface resistivity, and electromagnetic shielding effectiveness (EMSE) of conductive textiles are evaluated, therebydetermining the influences of the MWCNTs content. The test results show that using MWCNT can effectively improve themechanical properties of the coated yarns and conductive woven fabrics. In addition, 5 wt % of MWCNT provides the wovenfabrics with a lower surface resistivity and higher EMSE. The influences of the lamination angle and number of laminationlayers on EMSE are investigated, and the maximum EMSE of -49.89 dB occurs when the lamination angle is 0 °/90 °/0 °.
Mei-Feng Lai,Chen-Hung Huang,Jia-Horng Lin,Yu-Chun Chuang,Ching-Hua Wang,Ching-Wen Lou 한국섬유공학회 2021 Fibers and polymers Vol.22 No.9
In this study, conductive polymer composites and conductive functional fabrics are combined to serve aselectromagnetic shielding planks. Polypropylene (PP), carbon black (CB), and short carbon fibers (SCF) are blended atdifferent ratios to form conductive polymer composites (i.e. PCS series). The mechanical property, electrical property,morphology, and electromagnetic interference shielding effectiveness (EMI SE) of the PCS series are evaluated. The testresults show that with 20 wt% of conductive fillers (i.e. CB and SCF), PCS20 exhibits the optimal tensile strength, flexuralstrength, and electrical property that is 7 order of magnitude higher than that of pure PP plates. Moreover, the EMI SE of thisgroup also reaches -30 dB, which meets level one of civil EMI SE standard. Therefore, PCS20 is used to combine with fourconductive sandwiches. The resulting multilayered functional PCS-sandwich planks are tested in terms of mechanicalproperty, morphology, and EMI SE. The test results show that the planks composed of a pure conductive woven sandwichhave the maximum tensile property and significantly improved impact resistance. All of the multilayered functional plankshave EMI SE that is higher than -50 dB and are qualified for the protection level of standard EMI SE electronic devices.
Zheng, Chun-Long,Qiu, Chen,Shen, Mei-Xiao,Qu, Xiao,Zhang, Tie-Hong,Zhang, Ji-Hong,Du, Jia-Jun Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Background: The vascular endothelial growth factor family has been implicated in tumorigenesis and metastasis. The prognostic value of each vascular endothelial growth factor family member, particular VEGF/VEGFR co-expression, in patients with non-small lung cancer remains controversial. Materials and Methods: Relevant literature was identified by searching PubMed, EMBASE and Web of Science. Studies evaluating expression of VEGFs and/or VEGFRs by immunohistochemistry or ELISA in lung cancer tissue were eligible for inclusion. Hazard ratios (HRs) and 95% confidence intervals (CIs) from individual study were pooled by using a fixed- or random-effect model, heterogeneity and publication bias analyses were also performed. Results: 74 studies covering 7,631 patients were included in the meta-analysis. Regarding pro-angiogenesis factors, the expression of VEGFA (HR=1.633, 95%CI: 1.490-1.791) and VEGFR1 (HR=1.924, 95%CI: 1.220-3.034) was associated separately with poor survival. Especially, VEGFA over-expression was an independent prognostic factor in adenocarcinoma (ADC) (HR=1.775, 95%CI: 1.384-2.275) and SCC (HR=2.919, 95%CI: 2.060-4.137). Co-expression of VEGFA/VEGFR2 (HR=2.011, 95%CI: 1.405-2.876) was also significantly associated with worse survival. For lymphangiogenesis factors, the expression of VEGFC (HR=1.611, 95%CI: 1.407-1.844) predicted a poor prognosis. Co-expression of VEGFC/VEGFR3 (HR=2.436, 95%CI: 1.468-4.043) emerged as a preferable prognostic marker. Conclusions: The expression of VEGFA (particularly in SCC and early stage NSCLC), VEGFC, VEGFR1 indicates separately an unfavorable prognosis in patients with NSCLC. Co-expression VEGFA/VEGFR2 is comparable with VEGFC/VEGFR3, both featuring sufficient discrimination value as preferable as prognostic biologic markers.
Fu, Chun-Jing,Pan, Xiong-Fei,Zhao, Zhi-Mei,Saheb-Kashaf, Michael,Chen, Feng,Wen, Ying,Yang, Chun-Xia,Zhong, Xiao-Ni Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.15
Objectives: To evaluate medical students' knowledge of HPV and HPV related diseases and assess their attitudes towards HPV vaccination. Methods: A total of 605 medical undergraduates from Chongqing Medical University in China were surveyed using a structured and pretested questionnaire on HPV related knowledge. Results: Some 68.9% of the medical students were females, and mean age was 21.6 (${\pm}1.00$) years. Only 10.6% correctly answered more than 11 out of 14 questions on HPV related knowledge, 71.8% being willing to receive/advise on HPV vaccination. Female students (OR: 2.69; 95% CI: 1.53-4.72) and students desiring more HPV education (OR: 4.24; 95% CI: 1.67-10.8) were more willing to accept HPV vaccination. HPV vaccination acceptability was observed to show a positive association with HPV related knowledge. Conclusions: Our survey found low levels of HPV related knowledge and HPV vaccination acceptability among participating medical students. HPV education should be systematically incorporated into medical education to increase awareness of HPV vaccination.
Tong‑Mei Gao,Shuang‑Ling Wei,Jing Chen,Yin Wu,Feng Li,Li‑Bin Wei,Chun Li,Yan‑Juan Zeng,Yuan Tian,Dong‑Yong Wang,Hai‑Yang Zhang 한국유전학회 2020 Genes & Genomics Vol.42 No.1
Background Both photosynthetic pigments and chloroplasts in plant leaf cells play an important role in deciding on the photosynthetic capacity and efficiency in plants. Systematical investigating the regulatory mechanism of chloroplast development and chlorophyll (Chl) content variation is necessary for clarifying the photosynthesis mechanism for crops. Objective This study aims to explore the critical regulatory mechanism of leaf color mutation in a yellow–green leaf sesame mutant Siyl-1. Methods We performed the genetic analysis of the yellow-green leaf color mutation using the F2 population of the mutant Siyl-1. We compared the morphological structure of the chloroplasts, chlorophyll content of the three genotypes of the mutant F2 progeny. We performed the two-dimensional gel electrophoresis (2-DE) and compared the protein expression variation between the mutant progeny and the wild type. Results Genetic analysis indicated that there were 3 phenotypes of the F2 population of the mutant Siyl-1, i.e., YY type with light-yellow leaf color (lethal); Yy type with yellow-green leaf color, and yy type with normal green leaf color. The yellowgreen mutation was controlled by an incompletely dominant nuclear gene, Siyl-1. Compared with the wild genotype, the chloroplast number and the morphological structure in YY and Yy mutant lines varied evidently. The chlorophyll content also significantly decreased (P < 0.05). The 2-DE comparison showed that there were 98 differentially expressed proteins (DEPs) among YY, Yy, and yy lines. All the 98 DEPs were classified into 5 functional groups. Of which 82.7% DEPs proteins belonged to the photosynthesis and energy metabolism group. Conclusion The results revealed the genetic character of yellow-green leaf color mutant Siyl-1. 98 DEPs were found in YY and Yy mutant compared with the wild genotype. The regulation pathway related with the yellow leaf trait mutation in sesame was analyzed for the first time. The findings supplied the basic theoretical and gene basis for leaf color and chloroplast development mechanism in sesame.