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Suixin Wang,Jiao Jiao,Xinyu Wang,Qingyan Gai,Ping Kou,Wenjing Xu,Meng Luo,Chunjian Zhao,Yu-Jie Fu 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-
Integrated and environmentally friendly methods for extraction and enrichment of natural products havegained increasing interests. The proposed preparation process provides the possibility that extractionand pre-concentration for astragalosides from Radix Astragali roots can be conducted with the surfactantaqueous system in one single procedure. The formulated surfactant system composing of 2% TX-114 assurfactant and 0.03% (w/v) of Gemini 16-5-16 as co-surfactant showed higher extraction efficiency withultrasonic-assisted method and four astragalosides could be enriched by the cloud point phenomenon ofsurfactant. This work represents a valuable alternative for the eco-friendly extraction and enrichment ofsecondary metabolites from plants.
Hot Deformation and Workability of a CrCoNi Medium Entropy Alloy
Haijun Wang,Zhitong Hu,Junsheng Cao,Shuai Zhang,Tao Cheng,Qingyan Wang 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.2
Hot compression behaviors of CrCoNi medium entropy alloy are were performed on the Gleeble-3800 thermal simulator inthe strain rate range from 0.01 to 10 s−1 and the temperature range from 800 to 1100 °C. According to the true stress-truestrain curves, the true stress decreases with the decreasing of strain rate and the increasing of deformation temperature. Theexperimental parameters were fitted, and a modified model based on Arrhenius hyperbolic sine was established. Amongthem, material constants such as, n, A, and Q are functions of strain. Meanwhile, the processing map of CrCoNi mediumentropy alloy under different strain conditions are established. Importantly, the optimal domain of apparent flow stabilitycan be determined as the deformation temperature from 900 to 1100 °C and the strain rate from 0.01 to 10 s−1. The resultsindicate that the stability domain of the CrCoN medium entropy alloy has a wider range, and the strain has little effect onits processing performance.
Qingyan Wu,Hao Yu,Xibi Fang,Yunyun Cheng,Lijie Dong,Wenzhen Wei,Gang Wang,Haoyu Fu,Songcai Liu,Linlin Hao 한국통합생물학회 2016 Animal cells and systems Vol.20 No.6
Bama Xiang pig (BM) and Tibetan mini-pig (TM) are used as experimental animals in China; however, the dwarf molecular mechanisms of these Chinese local pig breeds are unknown. IGFBP-3 affects animal growth, carcass and meat quality. The aim of this study was to identify the polymorphisms in the promoter of the IGFBP-3 and analyse their effect on the IGFBP-3 mRNA expression level in liver and muscle tissues. High-density single-nucleotide polymorphisms (SNPs) (31) and InDels (5) were detected in the promoter of the IGFBP-3 in the BM, TM and Junmu No. 1 White (JM, control) pig breeds from 114 individuals by re-sequencing. A perfect Linkage disequilibrium consisted of 13 SNPs was observed in the promoter region and 2 main haplotypes were identified, of which the h1 genotype (GCA-ATGTACATAT) was more prevalent in JM breed than in TM or BM breeds (P < .0001), h2 (ATGTGCACG--CGC) was the dominant haplotype in TM and BM breeds (P < .0001). Expression analysis showed that haplotype of the promoter region is highly associated with the IGFBP-3 mRNA expression level in liver and muscle tissues of pigs. The IGFBP-3 mRNA expression level was determined higher in the liver and muscle tissues of pigs with h2 genotype as compared to that in pigs with h1 genotype (P < .05). The results suggest that the SNPs and haplotypes in the promoter of the IGFBP-3 gene may serve as useful molecular markers for the body growth traits and the breeding in swine.
Tan, Xiaojun,Wang, Weihua,Li, Ping,Li, Qingyan,Cheng, Lei,Wang, Shufen,Cai, Weiwang,Xing, Jinping Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
The geometries and isomerization of the alkylidene silylenoid $H_2C$ = SiLiF as well as its insertion reactions with R-H (R = F, OH, $NH_2$) have been systematically investigated at the B3LYP/6-311+$G^*$ level of theory. The potential barriers of the three insertion reactions are 97.5, 103.3, and 126.1 kJ/mol, respectively. Here, all the mechanisms of the three reactions are identical to each other, i.e., an intermediate has been formed first during the insertion reaction. Then, the intermediate could dissociate into the substituted silylene ($H_2C$ = SiHR) and LiF with a barrier corresponding to their respective dissociation energies. Correspondingly, the reaction energies for the three reactions are -36.4, -24.3, and 3.7 kJ/mol, respectively. Compared with the insertion reaction of $H_2C$ = Si: and R-H (R = F, OH and $NH_2$), the introduction of LiF makes the insertion reaction occur more easily. Furthermore, the effects of halogen (F, Cl, Br) substitution and inorganic salts employed on the reaction activity have also been discussed. As a result, the relative reactivity among the three insertion reactions should be as follows: H-F > H-OH > H-$NH_2$.
Naikun Shen,Qingyan Wang,Yan Qin,Jin Zhu,Qixi Zhu,Huizhi Mi,Yutuo Wei,Ribo Huang 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.6
A method combining a Plackett-Burman design(PBD), the steepest ascent method (SA), and a Box-Behnken design (BBD) was developed to optimize succinicacid production from cane molasses by Actinobacillussuccinogenes GXAS137. The important parameters were(g/L): total sugars of cane molasses (85 g/L), yeast extract(8.84 g/L), and MgCO3 (63.1 g/L). Verification experimentsindicated that the maximal succinic acid productionreached 57.43±0.86 g/L, which agreed with the predictedvalue (57.12 g/L). In addition, batch and fed-batchfermentations were carried out in a 1.3 L stirred bioreactor. Compared with a batch fermentation that produced 57.96g/L of succinic acid at 60 h, a fed-batch fermentation,performed to minimize the inhibition effect of the substrate,produced 64.34 g/L of succinic acid at 60 h. The combinedmethod is powerful for selection of optimized conditionsfor succinic acid production from cane molasses.
Xiaojun Tan,Weihua Wang,Ping Li,Qingyan Li,Lei Cheng,Shufen Wang,Weiwang Cai,Jinping Xing 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
The geometries and isomerization of the alkylidene silylenoid H2C = SiLiF as well as its insertion reactions with R-H (R = F, OH, NH2) have been systematically investigated at the B3LYP/6-311+G* level of theory. The potential barriers of the three insertion reactions are 97.5, 103.3, and 126.1 kJ/mol, respectively. Here, all the mechanisms of the three reactions are identical to each other, i.e., an intermediate has been formed first during the insertion reaction. Then, the intermediate could dissociate into the substituted silylene (H2C = SiHR) and LiF with a barrier corresponding to their respective dissociation energies. Correspondingly, the reaction energies for the three reactions are ‒36.4, ‒24.3, and 3.7kJ/mol, respectively. Compared with the insertion reaction of H2C = Si: and R-H (R = F, OH and NH2), the introduction of LiF makes the insertion reaction occur more easily. Furthermore, the effects of halogen (F, Cl, Br) substitution and inorganic salts employed on the reaction activity have also been discussed. As a result, the relative reactivity among the three insertion reactions should be as follows: H-F > H-OH > H-NH2.
Shichong Yu,Nan Wang,Xiaoyun Chai,Baogang Wang,Hong Cui,Qing-Jie Zhao,Yan Zou,Qingyan Sun,Qingguo Meng,Qiuye Wu 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.10
A series of fluconazole analogues containing1,2,3-triazole fragment have been designed and synthesizedon the basis of the active site of the cytochrome P45014a-demethylase (CYP51). Their structures were characterizedby 1H NMR, 13C NMR and LC–MS. The MIC80values indicate that the target compounds 1a–r showedhigher activities against nearly all the fungi tested to someextent except against Aspergillus fumigatus. Compounds1c, e, f, l and p showed 128 times higher activity (with theMIC80 value of 0.0039 mg/mL) than that of fluconazoleagainst Candida albicans and also showed higher activitythan that of the other positive controls.
Hu, Ping,Niu, Qingyan,Zhu, Yizhi,Shi, Chao,Wang, Jing,Zhu, Weiyun Asian Australasian Association of Animal Productio 2020 Animal Bioscience Vol.33 No.3
Objective: Sow milk (SM) may not be able to meet the piglet's nutritional needs in late lactation. Hence, this study was conducted to investigate the effects of early commercial milk (CM) supplement on the mucosal morphology, bacterial community and bacterial metabolites in jejunum of piglets. Methods: Ten litters of newborn piglets ([Yorkshire×Landrace]×Duroc) were randomly divided into 2 groups of 5 litters. The piglets in the control group were suckled by the sow (SM), while the piglets in the treatment group (CM supplement) were supplemented with a CM supplement along with suckling from d 4 to d 28 of age. Results: No significant differences were observed about jejunal mucosal morphology on d 28 and d 35 between two groups. On d 28, the activity of lactase in the jejunum was significantly decreased in the CM group, while the activity of sucrase and the ratio of maltase to lactase were significantly increased (p<0.05). On d 35, the activity of maltase in the jejunum was significantly increased in the CM group (p<0.05), and maltase to lactase ratio tended to increase in the CM group (p = 0.065). In addition, piglets in the CM group had a higher abundance of Clostridium XI, Tuicibater, and Moraxella in the jejunum on d 28, while the abundance of Lactobacillus was significantly increased on d 35 (p<0.05). Conclusion: The early CM supplement improved the maturation of the jejunum to some extent by enhancing the maltase and sucrase activities. Moreover, the early CM supplement could help maintain the homeostasis of internal environment in jejunum by increasing the microbial-derived metabolites.
Transcriptional Profiling of the Trichoderma reesei Recombinant Strain HJ48 by RNA-Seq
Huang, Jun,Wu, Renzhi,Chen, Dong,Wang, Qingyan,Huang, Ribo The Korean Society for Microbiology and Biotechnol 2016 Journal of microbiology and biotechnology Vol.26 No.7
The ethanol production of Trichoderma reesei was improved by genome shuffling in our previous work. Using RNA-Seq, the transcriptomes of T. reesei wild-type CICC40360 and recombinant strain HJ48 were compared under fermentation conditions. Based on this analysis, we defined a set of T. reesei genes involved in ethanol production. Further expression analysis identified a series of glycolysis enzymes, which are upregulated in the recombinant strain HJ48 under fermentation conditions. The differentially expressed genes were further validated by qPCR. The present study will be helpful for future studies on ethanol fermentation as well as the roles of the involved genes. This research reveals several major differences in metabolic pathways between recombinant strain HJ48 and wild-type CICC40360, which relates to the higher ethanol production on the former, and their further research could promote the development of techniques for increasing ethanol production.
Transcriptional Profiling of the Trichoderma reesei Recombinant Strain HJ48 by RNA-Seq
( Jun Huang ),( Renzhi Wu ),( Dong Chen ),( Qingyan Wang ),( Ribo Huang ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.6
The ethanol production of Trichoderma reesei was improved by genome shuffling in our previous work. Using RNA-Seq, the transcriptomes of T. reesei wild-type CICC40360 and recombinant strain HJ48 were compared under fermentation conditions. Based on this analysis, we defined a set of T. reesei genes involved in ethanol production. Further expression analysis identified a series of glycolysis enzymes, which are upregulated in the recombinant strain HJ48 under fermentation conditions. The differentially expressed genes were further validated by qPCR. The present study will be helpful for future studies on ethanol fermentation as well as the roles of the involved genes. This research reveals several major differences in metabolic pathways between recombinant strain HJ48 and wild-type CICC40360, which relates to the higher ethanol production on the former, and their further research could promote the development of techniques for increasing ethanol production.