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(The) Influence Factors of Consumer Inaction Regret and Purchase Intention
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Burkholderia tropica sp. nov.^ a novel nitrogen-fixing^ plant-associated bacterium
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Predicting uptake of a Routine Cervical Smear Test: A Comparison of the Health Belief Model and the Theory of Planned Behaviour
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오르페오 신화를 바탕으로 한 오페라 비교 분석 = A comparative study of operas based on the Orpheus Myth
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高山里遺蹟 出土 打製石器의 形態的 分析
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經營硏究
- 검색키워드
- 저자 : Wang Junnan (검색결과 5 건)
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Effect of infection by Beauveria bassiana on hemolymph and free amino acid in Xylotrechus rusticus
Ding Junnan,Yu Shaopeng,Wang Hui 한국곤충학회 2021 Entomological Research Vol.51 No.7
The purpose of this study was to clarify changes in the immune response of the hemolymph after infection with Beauveria bassiana in Xylotrechus rusticus larvae in order to reveal the physiological regulating mechanism of the pathogenic fungi. The results showed that B. bassiana was infectious to X. rusticus adults. The main infection sites were the thoracic internodes, lower wings, and abdomen. After infection with B. bassiana, the number of blood cells in the X. rusticus larvae was significantly higher than the control. The number of plasma cells and granulocytes in the hemolymph of the insect was largest. The total number of blood cells was mainly affected by the changes in number of plasma cells and granulocytes. The trehalose content in X. rusticus larvae after B. bassiana treatment continued to decrease compared to the control. The glucose content in the larvae hemolymph increased first, then decreased. The acid trehalase activity was significantly higher than the control, and the high activity was maintained for 60–84 h after infection with B. bassiana. Nineteen kinds of free amino acids were detected in the larvae hemolymph infected by B. bassiana. After infection, the total amount of free amino acids in the larvae hemolymph presented a trend where the amount first declined, then rose. Proline, arginine, and glutamine were the main amino acids required for the growth and development of B. bassiana in X. rusticus larvae. The amount of hemolymph and free amino acids played an important role in immunity during the infection with B. bassiana.
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Ting Wang,Junnan Wei,Huai Liu,Yunchao Feng,Xing Tang,Xianhai Zeng,Yong Sun,Tingzhou Lei,Lu Lin 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
2, 5-Bishydroxymethylfuran (BHMF) has been currently emerged as a promising biomass-derivedmonomer. It is highly desirable to proceed a chemical process at a high substrate concentration, by whicha facile and cost-effective separation of products can be expected. Herein, we report for thefirst time onthe hydrogenation of highly concentrated 5-hydroxymethylfurfural (HMF) in deep eutectic solvents(DESs), giving a near quantitative selectivity towards BHMF in ChCl-glycerol DES at 25 C in 3 h usingNaBH4 as the H-donor. DES is hailed as a new class of green solvent, in which HMF/BHMF could bestabilized by the strong hydrogen-bond interaction, and allowed the selective hydrogenation of HMF athigh concentration up to 40 wt%. Notably, the resulting BHMF could be facilely separated by extractionwith ethyl acetate, and then high purity of BHMF with a desirable isolated yield around 80% was obtainedafter removing of ethyl acetate. Additionally, the reaction efficiency of HMF hydrogenation in DESs wasverified to be strongly associated with the viscosity of DESs and the pKa value of hydrogen-bonding donor.
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Huai Liu,Xuejuan Cao,Ting Wang,Junnan Wei,Xing Tang,Xianhai Zeng,Yong Sun,Tingzhou Lei,Shijie Liu,Lu Lin 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The conversion of concentrated 5-hydroxymethylfurfural (HMF) or fructose to 2,5-furandicarboxylic acid(FDCA), a renewable alternative to petroleum-derived terephthalate acid, is highly desirable butchallenging for FDCA production in an industrial scale. In this contribution, DMSO/H2O mixture wasdemonstrated as an effective medium for the production of FDCA from high concentration of HMF orfructose. For example, FDCA yield up to 93% was achieved at 10 wt% HMF concentration in DMSO/H2Oover commercially available Ru/C (2 equiv. NaHCO3, 130 C, 4 MPa O2 and 12 h). Furthermore, an overallFDCA yield of 65% was achieved from concentrated fructose (19 wt%) through a facile two-step process. Notably, it is so far the highest HMF or fructose concentration employed for FDCA formation. As comparedto pure water or DMSO, DMSO/H2O mixed system is able to stabilize HMF in an alkaline environment,which allows the efficient oxidation of HMF at high concentrations.
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Yongjie Li,Qiang Fu,Hongyun Qin,Kun Yang,Junnan Lv,Qicheng Zhang,Zhang Hui,Feng Liu,Xia Chen,Ming Wang 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.10
With the intensity of resource scarcities and environmental problems, the disposal and recovery of spent lithium-ion batteries, especially recovery of valuable metals, becomes vital. In this work, a method of co-extracting nickel, cobalt, manganese and being separated from lithium by single-stage solvent extraction is proposed. The extraction and separation process of D2EHPA was studied. The effects of extractant concentration, saponification percentage, extraction time and O:A on the extraction efficiency of D2EHPA were systematically studied. Nearly 100% manganese, 94% cobalt and about 90% nickel were co-extracted and separated from lithium using D2EHPA in kerosene by single-stage extraction. The maximum value of separation factors (Ni/Li, Co/Li and Mn/Li) was 13.03, 23.42 and 1904.24. The mathematical model of extraction of four ions was developed by combination of Levenberg-Marquardt method and Universal Global Optimization method. The proposed extraction model accurately fits the experimental data and helps to predict the extraction efficiency of each metal under the corresponding conditions.
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Dongwei Yuan,Li Qing,Lu Xing,Lan Jianfeng,Qiu Zhidong,Wang Xuehong,Wang Junnan,Zheng Xiaojiao,Chen Sifan,Zhang Chong,Jin Junfei 생화학분자생물학회 2024 Experimental and molecular medicine Vol.56 No.-
Acute liver injury is the basis of the pathogenesis of diverse liver diseases. However, the mechanism underlying liver injury is complex and not completely understood. In our study, we revealed that CERK, which phosphorylates ceramide to produce ceramide-1-phosphate (C1P), was the sphingolipid pathway-related protein that had the most significantly upregulated expression during acute liver injury. A functional study confirmed that CERK and C1P attenuate hepatic injury both in vitro and in vivo through antioxidant effects. Mechanistic studies have shown that CERK and C1P positively regulate the protein expression of NRF2, which is a crucial protein that helps maintain redox homeostasis. Furthermore, our results indicated that C1P disrupted the interaction between NRF2 and KEAP1 by competitively binding to KEAP1, which allowed for the nuclear translocation of NRF2. In addition, pull-down assays and molecular docking analyses revealed that C1P binds to the DGR domain of KEAP1, which allows it to maintain its interaction with NRF2. Importantly, these findings were verified in human primary hepatocytes and a mouse model of hepatic ischemia‒reperfusion injury. Taken together, our findings demonstrated that CERK-mediated C1P metabolism attenuates acute liver injury via the binding of C1P to the DGR domain of KEAP1 and subsequently the release and nuclear translocation of NRF2, which activates the transcription of cytoprotective and antioxidant genes. Our study suggested that the upregulation of CERK and C1P expression may serve as a potential antioxidant strategy to alleviate acute liver injury.
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