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A Novel Synthetic Method for the Preparation of Aliphatic Aldehydes from the Corresponding Carboxylic Acids

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Chinese Journal of Chemistry 2011年第3期29卷 489-492页

作者： Guo, Yuan Lu, Zhenhuan yao, libo Shi, Zhen Department of Biochemistry and Molecular Biology The Fourth Military Medical University Xi'an Shaanxi 710032 China College of Chemistry and Materials Science Northwest University Xi'an Shaanxi 710069 China

A novel synthetic method for the preparation of aliphatic aldehydes from the corresponding carboxylic acids via 1,3-dimethylbenzimidazolium salts is provided. 1,3-Dimethylbenzimidazolium salts were rapidly reduced with sodium/ethanol and then hydrolyzed with hydrochloric acid to obtain aliphatic aldehydes, in which the 1,3-dimethylbenzimidazolium salts can be readily achieved from the corresponding carboxylic acids. The mechanism for the reductive reaction of 1,3-dimethylbenzimidazolium salts with sodium/ethanol was discussed.

关键词： aliphatic aldehydes 1,3-dimethylbenzimidazolium salts reduction sodium synthetic method

The correlation between nitrogen species in coke and NO_x formation during regeneration

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Chinese Journal of Chemical Engineering 2016年第5期24卷 606-611页

作者： Teng Li Chaohe Yang Xiaobo Chen libo yao Wei Liang Xuemei Ding State Key Laboratory of Heavy Oil Processing China University of Petroleum

Nitrogen oxides （NOx） emission during the regeneration ofcoked fluid catalytic cracking （FCC） catalysts is an en- vironmental issue. In order to identify the correlations between nitrogen species in coke and different nitrogen- containing products in tail gas, three coked catalysts with multilayer structural coke molecules were prepared in a fixed bed with model compounds （o-xylene and quinoline） at first. A series of characterization methods were used to analyze coke, including elemental analysis, FT-IR, XPS, and TG-MS. XPS characterization indicates all coked catalysts present two types of nitrogen species and the type with a higher binding energy is related with the inner part nitrogen atoms interacting with acid sites. Due to the stronger adsorption ability on acid sites for basic nitrogen compounds, the multilayer structural coke has unbalanced distribution of carbon and ni- trogen atoms between the inner part and the outer edge, which strongly affects gas product formation. At the early stage of regeneration, oxidation starts from the outer edge and the product NO can be reduced to N2 in high CO concentration. At the later stage, the inner part rich in nitrogen begins to be exposed to 02. At this period, the formation of CO decreases due to lack of carbon atoms, which is not beneficial to the reduction of NO. There- fore, nitrogen species in the inner part of multilayer structural coke contributes more to NOx formation. Based on the multilayer structure model of coke molecule and its oxidation behavior, a possible strategy to control NOx emission was discussed merely from concept.

关键词： NOx Basic nitrogen compounds FCC catalyst Coking Reaction Multilayer

A Confined Two-peaked Solar Flare Observed by EAST and SDO

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Research in Astronomy and Astrophysics 2024年第4期24卷 71-83页

作者： Liang Zhang Ruisheng Zheng Zhike Xue Changhui Rao Qing Lin Zhimao Du Jiawen yao libo Zhong yao Chen Institute of Space Sciences Shandong UniversityWeihai 264209China Yunnan Key Laboratory of the Solar physics and Space Science Kunming 650011China Institute of Frontier and Interdisciplinary Science.Shandong University Qingdao266237China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China National Laboratory on Adaptive Optics Chengdu610209China University of Chinese Academy of Sciences Beijing 100049China Shanghai Astronomy Museum Shanghai201306China

The solar flare is one of the most violent explosions,and can disturb the near-Earth space *** for commonly single-peaked solar flares in soft X-ray,some special flares show intriguing a two-peak feature that is deserved much more ***,we reported a confined two-peaked solar flare and analyzed the associated eruptions using high-quality observations from Educational Adaptive-optics Solar Telescope and Solar Dynamics *** the flare,a magnetic flux rope(MFR)formed through partially tether-cutting reconnection between two sheared *** flare occurred after the MFR eruption that was confined by the overlying strong ***,a small underlying filament immediately erupted,which was possibly destabilized by the flare *** successive eruptions were confirmed by the analysis of the emission measure and the reconnection ***,we suggest that the two peaks of the confined solar flare are corresponding to two episodes of magnetic reconnection during the successive eruptions of the MFR and the underlying filament.

关键词： Sun:activity Sun:corona Sun:flares Sun:magnetic fields Sun:filaments prominences Online material:animations

Methyl functionalization of trimesic acid in copper-based metal-organic framework for ammonia colorimetric sensing at high relative humidity

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Chinese Chemical Letters 2024年第6期35卷 211-215页

作者： Yuxin Wang Zhengxuan Song Yutao Liu Yang Chen Jinping Li libo Li Jia yao College of Chemical Engineering and Technology Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan 030024China Department of Gastroenterology Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuan 030024China

Exhaled ammonia(NH_(3))can be used as a crucial biomarker of kidney and liver ***,the high humidity in the detection conditions remains a challenge for accurate detection by gas ***,a copper-based metal-organic framework(CH_(3)-Cu-BTC)with methyl(CH_(3)^(-))functionalization of trimesic acid was synthesized for NH_(3) colorimetric *** CH_(3)-Cu-BTC exhibited a strong response for 5 ppm NH_(3) with high selectivity under high relative humidity(75%RH).Density functional theory(DFT)simulations indicated that the NH_(3) molecules interacted more strongly with CH_(3)-Cu-BTC than H_(2)O molecules did,and the corresponding color switching was attributed to the lone-pair electron in NH_(3) changing the coordination environment of Cu^(2+)ions,leading to an obviously visible color switching response from ruby green to *** on the tailor-made pore chemistry,the precise detection of trace amounts of NH_(3) in exhaled air was realized through functionalized MOF *** strategy used in this study not only offers a new pathway for the rapid detection of low concentration NH_(3) under humid conditions,but also shows a method for early respiration diagnosis of kidney and liver diseases.

关键词： Metal-organic framework Ammonia sensing Naked-eye color switching High humidity Respiration diagnosis

Intestinal Deletion of Ndrg2 Aggravates Colonic Inflammation via Paracellular Barrier Disruption

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Intestinal Deletion of Ndrg2 Aggravates Colonic Inflammation...

NDRG2 promotes ADR resistance through a Bad/p53 Complex in breast cancer

中国生物化学与分子生物学会2016年全国学术会议

作者： Yongzheng Ma libo yao Jian Zhang The State Key Laboratory of Cancer Biology Department of Biochemistry and Molecular Biology The Fourth Military Medical University

Paracellular barrier function plays important role in pathogenesis of IBDs,including UC and Crohn’s disease(CD),and maintain the gut homeo-mstyacs diosw.n Nstream-regulated gene 2(NDRG2)has been reported to be a tumor suppressor candidate and suppressed epithelial-mesenchymal transition(EMT)via modulating expression of E-cadherin in colitis-

关键词： NDRG2 colitis E-cadherin Adherens junctions

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NDRG2 promotes ADR resistance through a Bad/p53 Complex in b...

中国生物化学与分子生物学会2016年全国学术会议

作者： Yifang Wei libo yao Jian Zhang State Key Laboratory of Cancer Biology Department of Biochemistry and Molecular Biology The Fourth Military Medical University

NDRG2, a member of the N-myc downstream-regulated gene family, was first cloned in our laboratory and is regarded as a tumor suppressor gene that is transcriptionally repressed by c-Myc. It has been showed that NDRG2 is involved in p53-mediated apoptosis. Breast cancer now accounts for a quarter of all kinds of cancer in woman. Chemotherapeutics has been applied in clinical breast cancer treatment maturely, whereas, the intractable problem of sensitivity obstruct its expected efficiency. In our resent study, we found that NDRG2 were decreased in MCF-7/ADR cells(MCF-7 ADR resistant cells) compared with MCF-7/P cells(MCF-7 parental cells). NDRG2 overexpression enhanced G1 arrest, DNA damage and ADR resistance in MCF-7 cells which express wild p53, whereas the p53 mutant MDA-MB-231 cells indicated undetectable change compare to the NDRG2 overexpression group. The results also showed that NDRG2 was involved in p53-mediated apoptosis by increasing pro-apoptosis protein Bad.

关键词： NDRG2 breast cancer ADR resistance p53 Bad

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天基海洋目标信息感知与融合技术研究

武汉大学学报（信息科学版） 2017年第11期42卷 1530-1536页

作者：何友姚力波海军航空大学信息融合研究所山东烟台264001

天基信息网络海洋目标监视既要建立完善的天基海洋目标监视系统,更要研究面向海洋目标监视的多源卫星观测信息融合技术,提升海洋目标监视的广域搜索、精细识别、持续监视和快速响应能力。分析了海洋目标信息感知与融合中的海洋环境和海... 详细信息

天基信息网络海洋目标监视既要建立完善的天基海洋目标监视系统,更要研究面向海洋目标监视的多源卫星观测信息融合技术,提升海洋目标监视的广域搜索、精细识别、持续监视和快速响应能力。分析了海洋目标信息感知与融合中的海洋环境和海洋目标特点,在总结分析天基海洋目标信息感知与融合的发展历程和数据特点的基础上,提出了天基海洋目标信息感知与融合在平台网络、时空融合和信息融合等方面的技术突破途径和未来发展方向。

关键词：海洋目标监视信息感知与融合空间信息网络在轨处理

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基于空间信息网络的海洋目标监视分析与展望

通信学报 2019年第4期40卷 1-9页

作者：何友姚力波江政杰海军航空大学信息融合研究所山东烟台264001 海军装备部信息系统局北京100841

空间信息网络是海洋目标监视必不可少的技术,基于空间计算模式的多源卫星信息融合能够有效提升天基平台对海洋目标的广域搜索、精细识别、持续监视和快速响应能力,是我国未来天基海洋目标监视的重要发展方向。从空间信息网络和天基海洋... 详细信息

空间信息网络是海洋目标监视必不可少的技术,基于空间计算模式的多源卫星信息融合能够有效提升天基平台对海洋目标的广域搜索、精细识别、持续监视和快速响应能力,是我国未来天基海洋目标监视的重要发展方向。从空间信息网络和天基海洋目标监视的发展现状、相关研究工作、差距与不足等角度出发,分析了基于空间信息网络的海洋目标监视,结合空间计算技术,提出了基于空间信息网络的多源卫星海洋目标监视发展建议,并重点研究了空间资源组网、在轨信息融合和新型载荷三方面的关键技术。

关键词：空间信息网络海洋目标监视空间计算模式信息融合

Migration and invasion inhibitory protein(MIIP) inhibits prostate cancer tumor growth and invasion through negatively regulating epithelial-mesenchymal transition

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Migration and invasion inhibitory protein(MIIP) inhibits pro...