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RISS 인기검색어
- 검색키워드
- 저자 : Jinlei Li (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
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Deep Desulfurization of Fuels by Heteropolyanion-Based Ionic Liquid
Li, Jinlei,Hu, Bing,Hu, Chuanqun Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.1
A new heteropolyanion-based ionic ($[Hmim]_5PMo_{10}V_2O_{40}$) was synthesized by the reaction of molybdovanadophosphoric acid ($H_5PMo_{10}O_{40}$) with N-methylimidazole. [$[Hmim]_5PMo_{10}V_2O_{40}$ showed a high catalytic activity in the oxidative desulfurization of sulfur-containing compounds in 1-methylimidazolium tetrafluoroborate ($[Hmim]BF_4$) ionic liquid using 30% aqueous $H_2O_2$ as the oxidant. The catalytic system was of high activity, simplified workup and flexible recyclability. The catalytic oxidation reactivity of sulfur-containing compounds decreased in the order dibenzothiophene (DBT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The influences of various parameters including reaction time (t) and temperature (T), catalyst dosage, and oxidant to sulfur molar ratio n(O)/n(S) on the desulfurization of model oil were investigated in details. 99.1% of DBT conversion in the model oil was achieved at atmospheric pressure under the optimal conditions: n(O)/n(S) = 4:1, $60^{\circ}C$, 100 min and molar ratio of catalyst to sulfur of 0.062. The ionic liquid can be recycled six times without significant decrease in activity.
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Deep Desulfurization of Fuels by Heteropolyanion-Based Ionic Liquid
Jinlei Li,Bing Hu,Chuanqun Hu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.1
A new heteropolyanion-based ionic ([Hmim]5PMo10V2O40) was synthesized by the reaction of molybdovanadophosphoric acid (H5PMo10O40) with N-methylimidazole. [Hmim]5PMo10V2O40 showed a high catalytic activity in the oxidative desulfurization of sulfur-containing compounds in 1-methylimidazolium tetrafluoroborate ([Hmim]BF4) ionic liquid using 30% aqueous H2O2 as the oxidant. The catalytic system was of high activity, simplified workup and flexible recyclability. The catalytic oxidation reactivity of sulfur-containing compounds decreased in the order dibenzothiophene (DBT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The influences of various parameters including reaction time (t) and temperature (T), catalyst dosage, and oxidant to sulfur molar ratio n(O)/n(S) on the desulfurization of model oil were investigated in details. 99.1% of DBT conversion in the model oil was achieved at atmospheric pressure under the optimal conditions: n(O)/n(S) = 4:1, 60 oC, 100 min and molar ratio of catalyst to sulfur of 0.062. The ionic liquid can be recycled six times without significant decrease in activity.
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Mate recognition and antennal morphology of Octodonta nipae (Coleoptera: Chrysomelidae) adults
Lingfei Peng,Limin Chen,Jinlei Li,Youming Hou,Yigen Chen 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.1
The nipa palm hispid beetle, Octodonta nipae (Maulik) has been killing palm trees since its introduction intoHainan province, China, from Malaysia in 2001. It continues to spread within Hainan province, northeast toFujian province, and northwest to Yunnan province within China. Knowledge on signals involved in mate locationand recognition could help develop effective integrated pest management programs. In the present study,we first experimentally proved that antennae were essential in success of O. nipae mating. We then excisedvarious segments/flagellomeres of adult male and female antennae and observed their mating behavior. Resultsrevealed that the 5th to 9th flagellomeres, especially those of males, were important for the mating success. Finally, in an attempt to elucidate the types of antennal sensilla accountable for the mating success, morphologyof O. nipae antennae was studied in detail with scanning electron microscopy. Six types of sensilla were distinguished:aporous sensilla trichodea (T1), multiporous sensilla trichodea (T2), aporous sensilla chaetica (Ch1),uniporous sensilla chaetica (Ch2), multiporous sensilla basiconica (B), and Böhm sensilla (Bm). Aporous sensillatrichodea is the most abundant; multiporous sensilla trichodea and sensilla basiconica are considered as olfactoryreceptors, and uniporous sensilla chaetica as gustatory receptor. Importance of flagellomeres 5–9 in matingsuccess seemed to correspond to the abundance of sensilla on these segments.
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Jianhui Cai,Limin Xia,Jinlei Li,Shichang Ni,Huayu Song,Xiangbin Wu 대한암학회 2019 Cancer Research and Treatment Vol.51 No.1
Purpose We investigated the role of tumor-associated macrophages (TAMs) on the epithelial to mesenchymal transition (EMT) of colorectal cancer cells and determined the potential mechanism involved in the metastatic process. Materials and Methods In this study, flow cytometry was used to detect the expression of target proteins. We used transwell assay to evaluate the migration of cancer cells under specific conditions. Using real-time polymerase chain reaction, we examined the expressions of cytokines and EMTrelated markers in mRNA level. Animal assay was performed for analysis in vivo and hematoxylin and eosin was used to visualize the effect of TAMs on tumor metastasis. We also used immunohistochemistry and Western blotting to detect the expression of target proteins. Results Here, we observed enrichment of TAMs in colorectal tumor tissues, resulting in high metastasis in clinical therapy. Moreover, those TAMs could facilitate the EMT progression of colorectal cancer cells, which is induced by the transforming growth factor-β (TGF-β) derived from TAMs, leading to the invasion and migration of cancer cells. Conclusion Our results demonstrated that TAMs contributed the EMT progression through a TGF-β/ Smad2,3-4/Snail signaling pathway, and disrupting this pathway with TGF-β receptor inhibitor could suppress metastasis, readjusting our focus to the connection of TAMs and cancer metastasis.
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Manufacturing quality assurance for a rotate vector reducer with vibration technology
Jingjun Gu,Dishan Huang,Jing Tan,Jinlei Liu,Song Wang,Ming Li,Lin Xiao 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.5
To improve the product quality of rotate vector (RV) reducer at a low cost, a kind of vibration technology is introduced to investigate the quality assurance of RV. It includes a torsional vibration test to assess the vibration performance of the reducer and vibration analysis to recognize the manufacturing defects in the reducer’s mechanical components. The mechanical components with manufacturing defects are diagnosed through the signal processing on torsional vibration and defect characteristics recognition, and they are removed from the RV reducer by a reassembling process. As a result, the dynamic behavior of the reducer is evidently improved, the torsional vibration of the reducer is kept within a low level, and the feedback control is realized for product quality during the production process. Therefore, the presented vibration technology is highly recommended to the manufacture quality assurance of RV reducers applied in an industrial robot.
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