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Biomineralization-inspired copper-cystine nanoleaves capable of laccase-like catalysis for the colorimetric detection of epinephrine

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Frontiers of Chemical Science and Engineering 2021年第2期15卷 310-318页

作者： Miao Guan Mengfan Wang Wei Qi Rongxin Su Zhimin He School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300350China The Co-Innovation centre of Chemistry and Chemical Engineering of Tianjin Tianjin 300350China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin 300350China

Recently,many efforts have been dedicated to creating enzyme-mimicking catalysts to replace natural enzymes in practical *** by the pathological biomineralization behaviour of L-cystine,in this study,we constructed a laccase-like catalyst through the co-assembly of L-cystine with Cu *** analysis revealed that the formed catalytic Cu-cystine nanoleaves(Cu-Cys NLs)possess a Cu(I)-Cu(II)electron transfer system similar to that in natural *** kinetic studies demonstrated that the catalyst follows the typical Michaelis-Menten *** with natural laccase,the Cu-Cys NLs exhibit superior stability during long-term incubation under extreme pH,high-temperature or high-salt ***,the Cu-Cys NLs could be easily recovered and still maintained 76%of their activity after 8 ***,this laccase mimic was employed to develop a colorimetric method for epinephrine detection,which achieved a wider linear range(9–455μmol·L^(−1))and lower limit of detection(2.7μmol·L^(−1)).The Cu-Cys NLs also displayed excellent specificity and sensitivity towards epinephrine in a test based on urine samples.

关键词： biomineralization laccase L-cystine colorimetric detection enzyme mimic

Deep-UV fluorescence lifetime imaging microscopy

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Photonics Research 2015年第5期3卷 283-288页

作者： Christiaan J.de Jong Alireza Lajevardipour Mindaugas Gecevicius Martynas Beresna Gediminas Gervinskas Peter G.Kazansky Yves Bellouard Andrew H.A.Clayton Saulius Juodkazis centre for Micro-Photonics Faculty of Science Engineering and Technology Swinburne University of Technology Department of Mechanical Engineering Eindhoven University of Technology Optoelectronics Research centre University of Southampton Melbourne centre for Nanofabrication Ecole Polytechnique Fédérale de Lausanne Rue de la Maladiére 71b Center for Nanotechnology King Abdulaziz University

A novel fluorescence lifetime imaging microscopy(FLIM) working with deep UV 240–280 nm wavelength excitations has been developed. UV-FLIM is used for measurement of defect-related fluorescence and its changes upon annealing from femtosecond laser-induced modifications in fused silica. This FLIM technique can be used with microfluidic and biosamples to characterize temporal characteristics of fluorescence upon UV excitation, a capability easily added to a standard microscope-based FLIM. UV-FLIM was tested to show annealing of the defects induced by silica structuring with ultrashort laser pulses. Frequency-domain fluorescence measurements were converted into the time domain to extract long fluorescence lifetimes from defects in silica.

关键词： UV Deep-UV fluorescence lifetime imaging microscopy

Management of lumbar zygapophysial (facet) joint pain

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World Journal of Orthopedics 2016年第5期7卷 315-337页

作者： Laxmaiah Manchikanti Joshua A Hirsch Frank JE Falco Mark V Boswell Pain Management Center of Paducah Anesthesiology and Perioperative medicine University of Louisville NeuroInterventional Services and Neuroen-dovascular Program Massachusetts General Hospital Harvard Medical School Mid Atlantic Spine and Pain Physicians Pain medicine Fellowship Program Temple University Hospital

AIM: To investigate the diagnostic validity and therapeutic value of lumbar facet joint interventions in managing chronic low back ***: The review process applied systematic evidence-based assessment methodology of controlled trials of diagnostic validity and randomized controlled trials of therapeutic efficacy. Inclusion criteria encompassed all facet joint interventions performed in a controlled fashion. The pain relief of greater than 50% was the outcome measure for diagnostic accuracy assessment of the controlled studies with ability to perform previously painful movements, whereas, for randomized controlled therapeutic efficacy studies, the primary outcome was significant pain relief and the secondary outcome was a positive change in functional status. For the inclusion of the diagnostic controlled studies, all studies must have utilized either placebo controlled facet joint blocks or comparative local anesthetic blocks. In assessing therapeutic interventions, short-term and long-term reliefs were defined as either up to 6 mo or greater than 6 mo of relief. The literature search was extensive utilizing various types of electronic search media including Pub Med from 1966 onwards, Cochrane library, National Guideline Clearinghouse, ***, along with other sources includingprevious systematic reviews, non-indexed journals, and abstracts until March 2015. Each manuscript included in the assessment was assessed for methodologic quality or risk of bias assessment utilizing the Quality Appraisal of Reliability Studies checklist for diagnostic interventions, and Cochrane review criteria and the Interventional Pain Management Techniques- Quality Appraisal of Reliability and Risk of Bias Assessment tool for therapeutic interventions. evidence based on the review of the systematic assessment of controlled studies was graded utilizing a modified schema of qualitative evidence with best evidence synthesis, variable from level Ⅰ to level Ⅴ.RESULTS: Acro

关键词： Chronic low back pain Lumbar facet joint pain Lumbar discogenic pain Intraarticular injections Lumbar facet joint nerve blocks Lumbar facet joint radiofrequency Controlled diagnostic blocks Lumbar facet joint

Main group metal elements for ambient-condition electrochemical nitrogen reduction

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Journal of Energy Chemistry 2021年第11期30卷 51-70,I0002页

作者： Ying Sun Yu Wang Hui Li Wei Zhang Xi-Ming Song Da-Ming Feng Xiaodong Sun Baohua Jia Hui Mao Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina centre for Translational Atomaterials Faculty of ScienceSwinburne University of TechnologyHawthornVIC 3122Australia

Electrocatalytic N_(2) reduction under ambient-condition is considered to be the most appealing strategy to the conventional Haber-Bosch process for synthetic ammonia to alleviate greenhouse emissions and reduce environmental pollution, mainly powered by renewable energy. Recent years, rapid advances have been gained in this attractive research field, and numerous electrocatalysts have been exploited. However, its conversion efficiency is still far behind the requirement of industrial applications owing to the breakage of the N≡N triple bond, which is an energetically challenging kinetically complex multistep reaction and the strong competing reaction of hydrogen evolution reaction. Recently, main group metal-based catalysts have been demonstrated promising application prospect for ammonia production, significantly boosting their further application in this field. However, a comprehensive review of main group metal-based catalysts towards electrochemical ammonia production applications is still lacking. In this review, the fundamentals of N_(2) reduction, such as the reaction pathways, the reaction potential and the challenges of N_(2) reduction have been comprehensively discussed. And then, the role, mechanism, and effect of each main group element-based catalysts used for N_(2) reduction (Li, K, Al, Ga, Sn, Sb, Bi, and their compounds) are systematically summarized. Finally, several state-of-the-art strategies to promote their NRR catalytic performance, as well as the existing problems and prospects are put forward. This review is expected to guide the design and establishment of more efficient electrocatalytic N_(2) reduction systems based on main group metal elements in the future.

关键词： N2 reduction Main group Metal elements Challenges and strategies

Donor-conformation-dependent energy transfer for dual-color fluorescent probe with high-resolution imaging

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Science China Chemistry 2021年第8期64卷 1310-1315页

作者： Lifang Guo Xin Jin Hao Liu Jiangnan Zhu Zhiyun Zhang Jianhua Su Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CentreFrontiers Science Center for Materiobiology and Dynamic ChemistryEast China University of Science&TechnologyShanghai200237China

Herein,we presented a brand-new concept to construct the Forster resonance energy transfer(FRET)based cassette by integrating a vibration-induced emission(VIE)chromophore as the *** from traditional donors only with a single emission,the VIE donor possessed well-separated dual emission bands by altering the excited state molecular configuration from the bent state to the planar *** linking an acceptor such as a cyanine dye(Cy5),a novel VIE-FRET cassette(PPCy5)was *** planar emission profile of the VIE donor moiety could fully cover the absorption of Cy5,and thus the complete FRET process enabled the excellent bimodal spectra difference of 142 nm and ultra-large pseudo-Stokes shift of up to 300 *** from the viscosity-dependent characteristic of the VIE donor,PPCy5 could clearly and intuitively reveal the different viscosity regions in vivo by dual-color and high-resolution *** VIE-FRET paradigm provides an optional platform for developing donor-acceptor-based dual-color fluorescent probes with high-resolution imaging ability.

关键词： VIE FRET high-resolution dual-color large Stokes shift

Chemical cross-linking and mechanically reinforced carbon network constructed by graphene boosts potassium ion storage

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Nano Research 2022年第10期15卷 9019-9025页

作者： Chenxu Wang Ruohan Yu Wen Luo Wencong Feng Yuanhao Shen Nuo Xu Liqiang Mai Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 WuhanChina Nanostructure Research centre(NRC) Wuhan University of TechnologyWuhan 430070China

Carbon-based electrodes of potassium-ion batteries are of great research interest ascribed to their low cost and environmentally friendly ***,traditional carbon materials usually exhibit weak mechanical properties and incomplete crosslinking,resulting in poor stability and electrochemical ***,we report a new strategy for modifying reduced graphene oxide into a uniform few-layer structure through a sol–gel method combined with acid etching *** obtained chemical cross-linking and mechanically reinforced carbon network constructed by graphene(CNCG)demonstrates excellent electrochemical and mechanical *** as a free-standing anode(~7 mg·cm^(−2))for potassium ion battery,the asachieved CNCG delivers a high reversible specific capacity of 317.7 mAh·g^(−1) at a current density of 50 mA·g^(−1) and admirable cycle stability(208.4 mAh·g^(−1) at 50 mA·g^(−1) after 500 cycles).The highly reversible structural stability and fully cross-linked properties during potassiation are revealed by ex-situ *** work provides new ideas for the synthesis of new carbon materials and the development of high-performance electrodes.

关键词： potassium-ion battery graphene electrode chemical cross-linking mechanical property storage mechanism

Isolation and comparative proteomic analysis of mitochondria from the pulp of ripening citrus fruit

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Horticulture Research 2021年第1期8卷 403-418页

作者： Xin Li Yingfang Chai Hongbin Yang Zhen Tian Chengyang Li Rangwei Xu Chunmei Shi Feng Zhu Yunliu Zeng Xiuxin Deng Pengwei Wang Yunjiang Cheng National R&D centre for Citrus Preservation Key Laboratory of Horticultural Plant Biology(Ministry of Education)College of Horticulture and Forestry ScienceHuazhong Agricultural UniversityWuhan 430070People’s Republic of China

Mitochondria are crucial for the production of primary and secondary metabolites,which largely determine the quality of ***,a method for isolating high-quality mitochondria is currently not available in citrus fruit,preventing high-throughput characterization of mitochondrial ***,based on differential and discontinuous Percoll density gradient centrifugation,we devised a universal protocol for isolating mitochondria from the pulp of four major citrus species,including satsuma mandarin,ponkan mandarin,sweet orange,and *** blot analysis and microscopy confirmed the high purity and intactness of the isolated *** using this protocol coupled with a label-free proteomic approach,a total of 3353 nonredundant proteins were *** of the four mitochondrial proteomes revealed that the proteins commonly detected in all proteomes participate in several typical metabolic pathways(such as tricarboxylic acid cycle,pyruvate metabolism,and oxidative phosphorylation)and pathways closely related to fruit quality(such asγ-aminobutyric acid(GABA)shunt,ascorbate metabolism,and biosynthesis of secondary metabolites).In addition,differentially abundant proteins(DAPs)between different types of species were also identified;these were found to be mainly involved in fatty acid and amino acid metabolism and were further confirmed to be localized to the mitochondria by subcellular localization *** summary,the proposed protocol for the isolation of highly pure mitochondria from different citrus fruits may be used to obtain high-coverage mitochondrial proteomes,which can help to establish the association between mitochondrial metabolism and fruit storability or quality characteristics of different species and lay the foundation for discovering novel functions of mitochondria in plants.

关键词： orange purity oxidative

Hierarchically designed MoWSe_(2)/WO_(3)/C anode for fast and efficient Na+storage

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Journal of Energy Chemistry 2023年第5期80卷 291-301,I0008页

作者： Jian Wang Yachuan Shao Fei Yuan Huilan Sun Di Zhang Zhaojin Li S.Ramesh H.J.Woo Bo Wang centre for Ionics University of Malay1 Department of PhysicsFaculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Hebei Key Laboratory of Flexible Functional Materials School of Materials Science and EngineeringHebei University of Science and TechnologyShjiazhuang 0500000HebeiChina

Exploring anode materials with high energy and power density is one of the critical milestones in developing sodium-ion batteries/capacitors(SIBs/SICs).Here,the Mo and W-based bimetallic organic framework(Mo-W-MOF)with core-shell structure is first formed by a facile strategy,followed by a selenization and carbonization strategy to finally prepare multileveled Mo WSe_(2)/WO_(3)/C anode materials with core-shell petal like curled nanosheet *** the petal(MoSe_(2))-core(WO_(3))structure,the formation of WSe_(2)flakes by partial selenization on the surface of WO_(3)serves as a heterogeneous connection between MoSe_(2)and WO_(3).The enlarged layer distance(0.677 nm)between MoSe_(2)and WSe_(2)can facilitate the rapid transfer of Na+and *** density functional theory(DFT)calculations verify that the Mo WSe_(2)/WO_(3)/C heterostructure performs excellent metallic ***-situ X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and transmission electron microscopy(TEM)confirm the activation process from the initial insertion reaction to the later conversion ***,when employed as the anode of SIBs,a remarkable capacity of 384.3 mA h g-1after 950 cycles at 10 A g^(-1)is ***,the SICs assembled with commercial activated carbon(AC)as the cathode exhibits a remarkable energy density of 81.86 W h kg^(-1)(at 190 W kg^(-1))and 72.83 W h kg^(-1)(at 3800 W kg^(-1)).The unique structural design and the reaction investigation of the electrode process can provide a reference for the development of transition metal chalcogenides anodes.

关键词： Multileveled MoWSe2/WO_(3)/C Structure change Heterostructure Metallic properties Enlarged lattice distance The activation process

Enumeration of Family Fabaceae from Sechu Tuan Nalla Wildlife Sanctuary,Chamba District,Himachal Pradesh(India)

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Journal of Botanical Research 2022年第2期4卷 29-35页

作者： P.K.Deroliya Harminder Singh Puneet Kumar S.K.Singh Botanical Survey of India Northern Regional Centre192-Kaulagarh RoadDehradunUttarakhand248195India Botanical Survey of India Eastern Regional CentreShillongMeghalaya 793003India

An account of 20 species under 11 genera of the family Fabaceae is presented based upon a thorough study of the collected specimens and field surveys in this paper from Sechu Tuan Nalla Wildlife Sanctuary,Chamba district,Himachal *** these,five taxa are reported first time from the Chamba district of the *** updated nomenclature of the species,local name if any,a brief description of the plant,flowering and fruiting period,distribution in the study area,habitat and ecology and specimen examined have been provided.

关键词： Himalaya Pangi valley Astragalus