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Yan-Li Ji,Wei-Jie Qian,Quan-Fu An,Kueir-Rarn Lee,Cong-Jie Gao 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.66 No.-
We have designed a novel type of thin-film nanocomposite (TFN) membranes with embedded polyelectrolyte nanoparticles (PNPs) and investigated their applicability in the separation of amino acids. PNP particles were mixed with piperazine (PIP) and interfacial polymerized with trimesoyl chloride (TMC), allowing for simultaneous improvement in water permeability, amino acid selectivity, and anti-fouling property. Separation performance could be conveniently tuned by modulating the chemical structure of PNPs and their content in TFN membranes, as well as adjusting the feed pH value. This work would promote the application of polyelectrolyte nanoparticles based TFN membranes in the separation and purification of amino acids.
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Evolution of Tensile Properties of Compacted Red Clay under Wet and Dry Cycles
Ling Zeng,Hui-Cong Yu,Qian-Feng Gao,Jie Liu,Zi-Han Liu 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.2
Tensile strength is an important soil parameter that affects the stability of structures built on clayey soils. This paper presents an experimental study of the change of tensile properties of red clay during wet-dry cycles. Cyclic wet-dry tests were performed on compacted red clay specimens with different initial water contents and dry densities. Direct tensile tests and Brazilian split tests were then conducted on these specimens to determine the soil strengths. The effects of initial water content, initial dry density, number of wet-dry cycles, and crack rate on the tensile properties of red clay were investigated. The results demonstrate that the tensile strength of red clay is generally 1.566 times the splitting strength. Both the tensile strength and splitting strength are negatively correlated with the initial water content but are positively correlated with the initial dry density. Because of the presence of desiccation cracks, the tensile strength goes on reducing under wet-dry cycles. The tensile strength can be expressed by a power function of the initial water content, initial dry density, and crack rate. The proposed equation is useful to evaluate the tensile strength of cracked soils subjected to wet-dry cycles.
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Sulfakinin inhibits activity of digestive enzymes in the brown planthopper, Nilaparvata lugens
Guo Di,Zhang Su,Zhang Yi-Jie,Ma Jun-Yu,Gao Cong-Fen,Wu Shun-Fan 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.4
In animals, feeding can regulate release of digestive enzymes. Digestive enzymes are produced and released in response to specific ratios of nutrients, so the quality and quantity of food ingested are important factors in the secretion and activity of digestive enzymes. In general, the enzyme activity and secretion in the fed insects are relatively higher than that in the unfed insects. Neuropeptides and peptide hormones are important regulators of enzyme activity. In several insects, the neuropeptide sulfakinin (SK) is known to be a regulator of feeding and digestion similar to cholecystokinin in mammals. However, the roles of diet and SK in regulation of activity of digestive enzymes in the important pest insect, the brown planthopper (Nilaparvata lugens), are unknown. In this study, we identified six genes encoding different digestive enzymes and cloned three of these. We found that enzymatic activity and transcriptional levels of digestive enzymatic activity genes were upregulated by refeeding animals for 5 h after 24 h starvation. Furthermore, injection of N. lugens SK reduces digestive enzyme activity and leads to a downregulation of digestive enzyme gene transcripts. This study provides new views into the action of diet and SK in regulation of digestive enzymes in (hemimetabolous) insects. Taken together with the roles of SK in inducing satiety, our data strongly suggest that SK signaling is important in regulation of food ingestion and processing.
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( Dong Chen ),( Xiao-ya Zhang ),( Jing Sun ),( Qi-jie Cong ),( Wei-xiong Chen ),( Hafiz Muhammad Ahsan ),( Jing Gao ),( Jin-jun Qian ) 한국응용약물학회 2019 Biomolecules & Therapeutics(구 응용약물학회지) Vol.27 No.5
This study sought to evaluate the effects of Asiatic acid in LPS-induced BV2 microglia cells and 1-methyl-4-phenyl-pyridine (MPP+)-induced SH-SY5Y cells, to investigate the potential anti-inflammatory mechanisms of Asiatic acid in Parkinson’s disease (PD). SH-SY5Y cells were induced using MPP+ to establish as an in vitro model of PD, so that the effects of Asiatic acid on dopaminergic neurons could be examined. The NLRP3 inflammasome was activated in BV2 microglia cells to explore potential mechanisms for the neuroprotective effects of Asiatic acid. We showed that Asiatic acid reduced intracellular production of mitochondrial reactive oxygen species and altered the mitochondrial membrane potential to regulate mitochondrial dysfunction, and suppressed the NLRP3 inflammasome in microglia cells. We additionally found that treatment with Asiatic acid directly improved SH-SY5Y cell viability and mitochondrial dysfunction induced by MPP+. These data demonstrate that Asiatic acid both inhibits the activation of the NLRP3 inflammasome by downregulating mitochondrial reactive oxygen species directly to protect dopaminergic neurons from, and improves mitochondrial dysfunction in SH-SY5Y cells, which were established as a model of Parkinson’s disease. Our finding reveals that Asiatic acid protects dopaminergic neurons from neuroinflammation by suppressing NLRP3 inflammasome activation in microglia cells as well as protecting dopaminergic neurons directly. This suggests a promising clinical use of Asiatic acid for PD therapy.
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Positive Association of TEAD1 With Schizophrenia in a Northeast Chinese Han Population
Yang Sun,Lin Wen,Yi-Yang Luo,Wen-Juan Hu,Hui-Wen Ren,Ye Lv,Cong Zhang,Ping Gao,Li-Na Xuan,Guan-Yu Wang,Cheng-Jie Li,Zhi-Xin Xiang,Zhi-Lin Luan 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.12
Objective Schizophrenia is a complex and devastating psychiatric disorder with a strong genetic background. However, much uncertainty still exists about the role of genetic susceptibility in the pathophysiology of schizophrenia. TEA domain transcription factor 1 (TEAD1) is a transcription factor associated with neurodevelopment and has modulating effects on various nervous system diseases. In the current study, we performed a case–control association study in a Northeast Chinese Han population to explore the characteristics of pathogenic <i>TEAD1</i> polymorphisms and potential association with schizophrenia.Methods We recruited a total of 721 schizophrenia patients and 1,195 healthy controls in this study. The 9 single nucleotide polymorphisms (SNPs) in the gene region of <i>TEAD1</i> were selected and genotyped.Results The genetic association analyses showed that five SNPs (rs12289262, rs6485989, rs4415740, rs7113256, and rs1866709) were significantly different between schizophrenia patients and healthy controls in allele or/and genotype frequencies. After Bonferroni correction, the association of three SNPs (rs4415740, rs7113256, and rs1866709) with schizophrenia were still evident. Haplotype analysis revealed that two strong linkage disequilibrium blocks (rs6485989-rs4415740-rs7113256 and rs16911710-rs12364619-rs1866709) were globally associated with schizophrenia. Four haplotypes (C-C-C and T-T-T, rs6485989-rs4415740-rs7113256; G-T-A and G-T-G, rs16911710-rs12364619-rs1866709) were significantly different between schizophrenia patients and healthy controls.Conclusion The current findings indicated that the human <i>TEAD1</i> gene has a genetic association with schizophrenia in the Chinese Han population and may act as a susceptibility gene for schizophrenia.
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