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Which is the determinant for cellulose degradation in cooperative ionic liquid pairs: dissolution or catalysis?

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Science China Chemistry 2016年第5期59卷 557-563页

作者： Jinxing long Yangyu Zhang Lefu Wang xuehui Li School of Chemistry and Chemical Engineering South China University of Technology College of Life Science and Technology Jinan University

Catalytic conversion of sustainable cellulose to the value-added chemicals and high quality biofuel has been recognized as a perfect approach for the alleviation of the dependence on the non-renewable fossil resources. Previously, we successfully de- signed and explored novel and efficient cooperative ionic liquid pairs for this renewable material, which has advantages of high reactor efficiency than current technologies because of the dissolution and in situ catalytic decomposition mechanism. Here, the determinant of this process is further studied by the intensive investigation on the relationship between the cellulose conversion and the properties of ionic liquid catalyst and solvent. Scanning electron microscope （SEM）, thermogravimetric analysis （TG） and elemental analysis were used for the comparative characterization of raw cellulose and the residues. The re- suits demonstrate that this consecutive dissolution and in situ catalysis process is much more dependent on the dissolution ca- pability of ionic liquid solvent, while comparatively, the effect of in situ acid catalysis is relatively insignificant.

关键词： cellulose ionic liquid dissolution in situ catalysis determinant

Ionic liquids: Efficient solvent and medium for the transformation of renewable lignocellulose

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Science China Chemistry 2012年第8期55卷 1500-1508页

作者： long JinXing LI xuehui WANG LeFu ZHANG Ning State Key Laboratory of Pulp&Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Chemistry Nanchang UniversityNanchang 330047China

Carbon-enriched lignocelluloses are regarded as the perfect alternative for nonrenewable fossil fuel, and have a great potential to alleviate the increasing energy crisis and climate change. However, the tightly covalent structure and strong intra and in- ter-molecular hydrogen bonding in lignoceUulose make it high recalcitrance to transformation due to the poor solubility in wa- ter or common organic solvents. Dissolution and transformation of lignocellulose and its constituents in ionic liquids have therefore attracted much attention recently due to the tunable physical-chemical properties. Here, ionic liquids with excellent dissolving capability for biomass and its ingredients were examined. The technologies for lignocellulose biorefining in the presence of ionic liquid solvents or catalysts were also summarized. Some pertinent suggestions for the future catalytic conver- sion and unitization of this sustained carbon-rich resource are proposed.

关键词： ionic liquids lignocellulose dissolution biorefinery

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300t转炉ID风机国产化实践

武钢技术 2016年第6期54卷 58-59页

作者：龙学辉陈立刘海黄胜生胡文超武钢炼钢总厂三分厂湖北武汉430083

转炉一次除尘风机是氧枪顶吹转炉烟气净化回收系统的最关键设备。武钢300t转炉OG装置配用了3套IDF型双进风涡轮鼓风机,其叶轮经过4年多的使用后,相继出现备件短缺问题,为了控制设备成本,开展了风机叶轮备件国产化工作,降低了采购成本,... 详细信息

转炉一次除尘风机是氧枪顶吹转炉烟气净化回收系统的最关键设备。武钢300t转炉OG装置配用了3套IDF型双进风涡轮鼓风机,其叶轮经过4年多的使用后,相继出现备件短缺问题,为了控制设备成本,开展了风机叶轮备件国产化工作,降低了采购成本,同时为后期相关设备国产化打下了坚实基础。

关键词：转炉 ID风机国产化

Synthesis and fluorescent properties of quinoxaline derived ionic liquids

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Green Energy & Environment 2022年第5期7卷 996-1005页

作者： Jiaqi Wu Lei Zhang Jinxing long Qiang Zeng Biaolin Yin xuehui Li School of Chemistry and Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologyState Key Laboratory of Pulp&Paper EngineeringSouth China University of TechnologyGuangzhou510640China

Ionic liquids(ILs) have attracted increasing attention since last few decades due to their high molecular design abilities and wide applications in different *** this study,four novel fluorescent isoquinolino [2,1-a]quinoxalin-5-ium ILs were designed and synthesized via a two-step process including a simple dual Schiff’s base formation and a subsequent [RhCp*Cl_(2)]_(2)-catalyzed oxidative C-H activation/annulation *** as-synthesized ILs were extensively characterized using FT-IR,~1 H-NMR,^(13)C-NMR,^(19)F-NMR,HSQC-NMR,HMBC-NMR and *** photophysical properties were determined by steady-state fluorescence *** results demonstrate that all these ILs showed dual or triple emissions,large stokes shift(90 nm) and mechanochromic *** on solvatochromism and titration experiments,it is thought that the emission bands of the ILs are raised from their local excited states,charge transfer states or excited state proton transfer of cations,while the substitute effect of these quinoxaline derived ILs on their stokes shifts is negligible.

关键词： spectroscopy reaction liquids

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催化生物质高效转化过程耦合与强化

中国科学:化学 2025年第1期55卷 107-114页

作者：唐稚阳何欣骏吴可嘉龙金星曾强何宏艳李雪辉华南理工大学化学与化工学院绿色化学产品技术广东省重点实验室广州510640 中国科学院过程工程研究所离子液体清洁过程北京市重点实验室北京100190

生物质是自然界中唯一可再生含碳资源且年产量巨大,将其高效转化与利用,契合“双碳”目标.但生物质的化学转化存在条件苛刻、产物分布广、高值化产品选择性低等瓶颈问题.结合课题组的科研成果,本文基于生物质本征结构特征,结合高效解聚... 详细信息

生物质是自然界中唯一可再生含碳资源且年产量巨大,将其高效转化与利用,契合“双碳”目标.但生物质的化学转化存在条件苛刻、产物分布广、高值化产品选择性低等瓶颈问题.结合课题组的科研成果,本文基于生物质本征结构特征,结合高效解聚催化过程的设计,从溶解、催化、反应、产物分离等多角度出发,创新催化生物质高效定向转化过程耦合与强化技术模式,并在生物质高效转化新路径、转化过程耦合与强化作用机制等方面进行阐释;同时,对催化过程耦合多场作用改善生物质定向转化效率与拓展生物质高效利用路径进行了展望,期望为生物质高效转化领域的相关研究提供理论基础与技术支撑.

关键词：生物质木质素定向转化过程耦合过程强化

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极固宁^(TM)对全冠牙体预备后牙髓组织的影响

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福建医科大学学报 2007年第1期41卷 62-65页

作者：陈素凤程辉郑志强姚丽艳龙学辉郑明许潾于福建医科大学附属口腔医院修复科福州350002 福建医科大学口腔医学院福州350004 福建医科大学附属口腔医院颌面外科福州350002 福建医科大学附属口腔医院正畸科福州350002

目的观察极固宁TM涂布于金属烤瓷全冠活髓基牙牙预备体表面21 d对牙髓组织学形态的影响。方法选择因正畸治疗需要而计划拔除的20颗前磨牙进行金属烤瓷全冠牙体预备,其中每2颗牙均为同颌同名牙;采用随机、双盲、自身对照设计分为2组:对... 详细信息

目的观察极固宁TM涂布于金属烤瓷全冠活髓基牙牙预备体表面21 d对牙髓组织学形态的影响。方法选择因正畸治疗需要而计划拔除的20颗前磨牙进行金属烤瓷全冠牙体预备,其中每2颗牙均为同颌同名牙;采用随机、双盲、自身对照设计分为2组:对照组在牙预备体上直接用氧化锌丁香酚水门汀粘固暂时冠;观察组在牙预备体上涂布极固宁TM后用氧化锌丁香酚水门汀粘固暂时冠。所有牙分别于牙体预备后21 d拔除,常规组织病理切片,H-E染色,显微镜下观察评价牙髓组织反应。结果活髓基牙经金属烤瓷全冠牙体预备21 d时,对照组和观察组的牙髓组织反应无明显差别(P>0.05)。牙髓组织的反应程度与牙预备体的剩余牙本质厚度(RDT)有关;RDT分别为491.76,503.88和487.32μm的3个样本观察到修复性牙本质的形成。结论在本实验条件下,金属烤瓷全冠牙预备体表面涂布极固宁TM21 d对活髓基牙的牙髓组织无明显影响。

关键词：抗变态反应药金属烤瓷合金牙冠(假体) 牙本质牙髓

How can rice genetics benefit from rice-domestication study?

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National Science Review 2016年第3期3卷 278-280页

作者： Erwang Chen xuehui Huang Bin Han National Center for Gene Research Center of Excellence for Molecular Plant SciencesInstitute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of Sciences University of Chinese Academy of Sciences

Uncovering the puzzle of the origin and domestication process of cultivated rice has greatly impacted rice genetics,but comprehensively exploiting elite alleles from both wild species and domesticated varieties for mo... 详细信息

关键词： QTL How can rice genetics benefit from rice-domestication study gene

Whole-genome characterization of CKX genes in Prunus persica and their role in bud dormancy and regrowth

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Journal of Integrative Agriculture 2024年第12期23卷 4058-4073页

作者： xuehui Zhao Jianting Liu Xiling Fu long Xiao Qingjie Wang Chaoran Wang ZhizhangChen Jiakui Li Changkun Lu Hui Cao Ling Li School of Advanced Agricultural Sciences Weifang UniversityWeifang 261061China College of Horticulture Science and Engineering Shandong Agricultural UniversityTai’an 271000China Development and Reform Bureau of Wendeng Weihai 264400China Weifang Academy of Agricultural Sciences Weifang 261061China College of Horticulture and Landscape Architecture Yangzhou UniversityYangzhou 225009China Weifang Vocational College Weifang 261041China School of Foreign Languages Weifang UniversityWeifang 261061China

Bud dormancy is a complex physiological process of perennial woody plants living in temperate regions,and it can be affected by various *** oxidase/dehydrogenases(CKXs)are a group of enzymes essential for maintaining cytokinin homeostasis,yet a comprehensive analysis of these enzymes in peach remains ***,a total of 51 CKX members from different species,including six from peach,eleven from apple,nine from poplar,seven from Arabidopsis,eight from strawberry,and ten from rice,were identified using the Simple HMM Search tool of TBtools and a BLASTP program and classified into four groups using phylogenetic *** motif and gene structure analysis of these 51 CKX members showed that 10 conserved motifs were identified,and each CKX gene contained at least two ***-element analysis of PpCKXs showed that all PpCKX genes have light-responsive elements and at least one hormone-responsive *** changed relative expression levels of six PpCKX genes in peach buds from endodormancy to bud-break were observed by *** them,the expression trend of PpCKX6 was almost opposite that of PpEBB1,a positive bud-break regulator in woody plants,around the bud-break stage.Y1H,EMSA,and dual-luciferase assays indicated that PpEBB1negatively regulated PpCKX6 through direct binding to a GCC box-like element located in the promoter region of *** addition,a transient assay showed that overexpression of PpCKX6 delayed the bud-break of *** results indicate that the PpCKX genes play an essential role in the dormancy-regrowth process,and Pp CKX6may act downstream of PpEBB1 directly to regulate the bud-break process,which further improves the hormoneregulatory network of dormancy-regrowth of woody plants,and provides new insights for molecular breeding and genetic engineering of peach.

关键词： peach CKX family PpEBB1 dormancy bud-break

Distributed fiber optic sensors for tunnel monitoring:A state-of-the-art review

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3841-3863页

作者： xuehui Zhang Honghu Zhu Xi Jiang Wout Broere Geo-Engineering Section Department of Geoscience and EngineeringDelft University of TechnologyDelft2628CNthe Netherlands School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

Distributed fiber optic sensors(DFOSs)possess the capability to measure strain and temperature variations over long distances,demonstrating outstanding potential for monitoring underground *** study presents a state-of-the-art review of the DFOS applications for monitoring and assessing the deformation behavior of typical tunnel infrastructure,including bored tunnels,conventional tunnels,as well as immersed and cut-and-cover *** systems based on Brillouin and Rayleigh scattering principles are both *** implementing DFOS monitoring,the fiber optic cable can be primarily installed along transverse and longitudinal directions to(1)measure distributed strains by continuously adhering the fiber to the structure’s surface or embedding it in the lining,or(2)measure point displacements by spot-anchoring it on the lining *** are four critical aspects of DFOS monitoring,including proper selection of the sensing fiber,selection of the measuring principle for the specific application,design of an effective sensor layout,and establishment of robust field sensor *** four issues are comprehensively discussed,and practical suggestions are provided for the implementation of DFOS in tunnel infrastructure monitoring.

关键词： Distributed fiber optic sensor(DFOS) Tunnel infrastructure Distributed strain sensing Point displacement monitoring Field instrumentation