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Subtropical urban turfs： Carbon and nitrogen pools and the role of enzyme activity

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Journal of Environmental Sciences 2018年第3期30卷 18-28页

作者： Ling Kong LM chu School of Life Sciences The Chinese University of Hong Kong Shatin NT Hong Kong SAR China department of orthopaedics & traumatology faculty of medicine the chinese university of hong kong

Urban grasslands not only provide a recreational venue for urban residents, but also sequester organic carbon in vegetation and soils through photosynthesis, and release carbon dioxide through respiration, which largely contribute to carbon storage and fluxes at regional and global scales. We investigated organic carbon and nitrogen pools in subtropical turfs and found that dissolved organic carbon（DOC） and dissolved organic nitrogen（DON）were regulated by several factors including microbial activity which is indicated by soil enzymatic activity. We observed a vertical variation and different temporal patterns in both soil DOC, DON and enzyme activities, which decreased significantly with increasing soil depths. We further found that concentration of soil DON was linked with turf age. There were correlations between grass biomass and soil properties, and soil enzyme activities. In particular, soil bulk density was significantly correlated with soil moisture and soil organic carbon（SOC）. In addition, DOC correlated significantly with DON. Significant negative correlations were also observed between soil total dissolved nitrogen（TDN） and grass biomass of Axonopus compressus and Zoysia matrella. Specifically, grass biomass was significantly correlated with the soil activity of urease and β-glucosidase. Soil NO3-N concentration also showed negative correlations with the activity of both β-glucosidase and protease but there were no significant correlations between cellulase and soil properties or grass biomass. Our study demonstrated a relationship between soil C and N dynamics and soil enzymes that could be modulated to enhance SOC pools through management and maintenance practices.

关键词： Dissolved organic carbon (DOC)lDissolved organic nitrogen (DON)lSoil enzymelTurfgrass

Renewables finance and investment: how to improve industry with private capital in China

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1385-1398页

作者： Pingkuo LIU Penghao chu College of Economics and Management Shanghai University of Electric PowerShanghai 200090China

One purpose of stimulating financing and investment through private capital is to absorb a higher proportion of renewables and promote renewable industry *** paper first reviews the current overall situation of renewables financing and investment,and further analyzes the policy environment with respect to the development plan,regulation and special *** on the analysis of the status quo,the paper then discusses the internalities and the externalities that have driven the changes of private capital investment in renewable energy projects,illustrated by a strength,weakness,opportunity and threat(SWOT)*** ideal financing model,public-private partnership and distributed energy resource pattern are analyzed to identify key arrangements and design proper development schemes for both private investors and the *** China can overcome the defects and obstacles in a reasonable and orderly fashion,the financing and investment problem of China’s renewables industry will be solved in many *** capital in China’s renewable energy market will bring great incentive if the entire industry can select some promising sub-industries in the renewables sector and choose some appropriate operation modes.

关键词： Renewables industry Ideal financing model Public–private partnership Distributed energy resources

MIL-100(Fe)-based functional materials for water decontamination: A state of the art review

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Progress in Natural Science:Materials International 2023年第4期33卷 386-406页

作者： Hongyu chu Chong-Chen Wang School of Environment and Energy Engineering Beijing University of Civil Engineering and Architecture Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation

Iron-based metal-organic frameworks(MOFs) have been received extensive attentions over the past years due to the low biotoxicity, multi-function, and wide applications. MIL-100(Fe) bearing unique structure has become the most popular Fe-based MOF up to now, and it is well-recognized as desirable environmental function material,especially for water purification. To provide systematic insight into MIL-100(Fe) for oriented design of novel materials, we review the recent progress and characteristics of MIL-100(Fe)-based materials, including MIL-100(Fe)-based composites, derivatives, and monoliths for water decontamination via adsorption, separation,and advanced oxidation processes(AOPs). Based on existing challenges and limitations discussed in this review,we further propose the future perspectives of MIL-100(Fe)-based materials for sustainable application in water remediation.

关键词： MIL-100(Fe) Water purification Adsorption Separation Advanced oxidation process

Motor cortical circuit adaptations in parkinsonism

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Neural Regeneration Research 2024年第10期19卷 2107-2108页

作者： Hong-Yuan chu Department of Neurodegenerative Science Van Andel Research InstituteGrand RapidsMIUSA Aligning Science Across Parkinson’s(ASAP)Collaborative Research Network

Parkinson's disease is a chronic and progressive neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta,which leads to the featured motor impairment of parki... 详细信息

关键词： parkin impairment rigidity

INFINITE SERIES FORMULAE RELATED TO GAUSS AND BAILEY 2F1(1/2)-SUMS

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Acta Mathematica Scientia 2020年第2期40卷 293-315页

作者： Wenchang chu School of Mathematics and Statistics Zhoukou Normal UniversityZhoukou 466001China Department of Mathematics and Physics University of Salento(P.O.Box 193)73100 LecceItaly

The unifiedΩ-series of the Gauss and Bailey2F1(1/2)-sums will be investigated by utilizing asymptotic methods and the modified Abel lemma on summation by *** remarkable transformation theorems for theΩ-series will be proved whose particular cases turn out to be strange evaluations of nonterminating hypergeometric series and infinite series identities of Ramanujan-type,including a couple of beautiful expressions forπand the Catalan constant discovered by Guillera(2008).

关键词： Abel's lemma on summation by parts classical hypergeometric series Gauss'2F1(1/2)-sum Bailey's 2F1(1/2)-sum Saddle point method Catalan's constant

Non-Gaussian Random Bi-matrix Models for Bi-free Central Limit Distributions with Positive Definite Covariance Matrices

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Acta Mathematica Sinica,English Series 2019年第12期35卷 1891-1905页

作者： Ming chu GAO School of Mathematics and Information Science Baoji University of Arts and Sciences Department of Mathematics Louisiana College

In this paper,we construct random two-faced families of matrices with non-Gaussian entries to approximate a bi-free central limit distribution with a positive definite covariance *** prove that,under modest conditions weaker than independence,a family of random two-faced families of matrices with non-Gaussian entries is asymptotically bi-free from a two-faced family of constant diagonal matrices.

关键词： Bi-free central limit distributions non-Gaussian random matrices asymptotic bi-freeness

A geometric characterisation of real C^(*)-algebras

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Science China Mathematics 2023年第10期66卷 2277-2292页

作者： Cho-Ho chu School of Mathematical Sciences Queen Mary University of LondonLondon E 14NSUK

We characterise the positive cone of a real C^(*)-algebra *** an open coneΩin a real Banach space V,with the closureΩ,we show thatΩis the interior of the positive cone of a unital real C^(*)-algebra if and only if it is a Finsler symmetric cone with an orientable extension,which is equivalent to the condition that V is,in an equivalent norm,the Hermitian part of a unital real C^(*)-algebra with the positive coneΩ.

关键词： real C^(*)-algebra Banach manifold Finsler symmetric cone Jordan algebra

Versatile Magnetic Nanoparticles for Spatially Organized Assemblies of Enzyme Cascades:A Comprehensive Investigation of Catalytic Performance

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Chinese Journal of Chemistry 2022年第12期40卷 1437-1446页

作者： Xinshuang chu Qinghong Shi Deportment of Biochemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology(Ministry of Education) Tianjin UniversityTianjin 300350China

Inspired by nature,precise spatial organization of enzyme cascades of interest is crucial to the improvement of catalytic ***,DNA scaffolds were introduced to construct a toolkit for versatile immobilization of enzyme pairs on dextran-coated magnetic nanoparticles(MNPs).After the glucose oxidase(GOx)and horseradish peroxidase(HRP)pair was immobilized through random cova-lent,DNA-directed and DNA tile-directed strategies,the immobilized GOx/HRP pair on the MNP-based carrier assembled with DNA tile(TD@MNPs)exhibited the highest activity due to rational spatial organization and less conformational change of constituent *** a decrease in interenzyme distance on TD@MNPs,furthermore,the catalytic efficiency of the HRP/GOx pair increased further for both substrates,2,2'-azinobis(3-ethyl-benzthiazoline-6-sulfonate)(ABTS)and 3,3',5,5'-tetramethyl benzidine(TMB).As the assembled HRP was closer to the carrier surface,the catalytic efficiency of the GOx/HRP pair increased by 6.2-fold for positively charged TMB and only by 62%for negatively charged ABTS compared with the free GOx/HRP ***,a reversal of catalytic efficiency was found after the GOx/HRP pair was assembled on a positively charged carrier(TD@pMNPs).This research demonstrated that MNP-based car-riers had the potential to become a versatile toolkit for shedding an insight into catalytic performance and the development of new biocatalysts.

关键词： Enzymes Immobilization DNA structures Substrate transport Spatial organization

RELATIONS BETWEEN INTERFACE OF CF/Al-4.5 Cu COMPOSITE AND SOLIDIFICATION PROCESSING

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中国有色金属学会会刊：英文版 1997年第2期7卷 133-137页

作者： chu, Shuangjie Wu, Renjie Shanghai Jiao Tong Univ Shanghai China

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关键词： CF/Al 4.5Cu composite interface solidification cooling rate