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Polycyclic aromatic hydrocarbon biodegradation and extracellular enzyme secretion in agitated and stationary cultures of Phanerochaete chrysosporium

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Journal of Environmental Sciences 2008年第1期20卷 88-93页

作者： ding juan CONG Jun ZHOU juan GAO Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China School of the Energy and Environment Southeast University Nanjing 210096 China

The extracellular enzyme secretion and biodegradation of polycyclic aromatic hydrocarbons （PAHs） were studied in agitated and shallow stationary liquid cultures of Phanerochaete chrysosporium. Veratryl alcohol and Tween80 were added to cultures as lignin peroxidase （LIP） and manganese peroxidase （MnP） inducer, respectively. Shallow stationary cultures were suitable for the production of enzyme, whereas agitated cultures enhanced overall biodegradation by facilitating interphase mass transfer of PAHs into aqueous phases. The use of a LiP stimulator, veratryl alcohol, did not increase PAH degradation but significantly enhanced LiP activity. In contrast, Tween80 increased both MnP secretion and PAH degradation in shallow stationary cultures. On the other hand, high PAH degradation was observed in agitated cultures in the absence of detectable LiP and MnP activities. The results suggested that extracellular peroxidase activities are not directly related to the PAH degradation, and the increased solubility rather than enzyme activity may be more important in the promotion of PAH degradation.

关键词： lignin peroxidase (LIP) manganese peroxidase (MnP) Phanerochaete chrysosporium polycyclic aromatic hydrocarbons (PAHs) solubilization

Frictionless Multi-field Coupling Contact Problem for a Thermoelectric Layer Loaded by Two Rigid Punches

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Acta Mechanica Solida Sinica 2023年第2期36卷 282-292页

作者： Yali Zhang Hailiang Ma juan Yang Shenghu ding School of Mathematics and Statistics Ningxia UniversityYinchuan 750021China School of Ethnic Preparatory Education Ningxia UniversityYinchuan 750021China

In this paper,the thermo-electro-mechanical coupling contact problem of thermoelectric material with double punches is analyzed *** the Fourier cosine transform technique,the thermo-electro-elastic problem is transformed into three sets of singular integral equations,which are numerically solved by the Gauss–Chebyshev integral formula according to the unknown normal electric current density,normal energy flux and normal contact *** a rigid flat indenter,the results can be covered by the degradation results of two rigid flat *** numerical results reveal the interaction between two punches and the effect of thermoelectric load on the indentation *** interaction between the two punches reduces the contact pressure at the inner edge of the indenter as the thermoelectric load increases while increasing the stress singularity at the outer *** change of punches’spacing makes the singularity of normal stress at the inner and outer edges *** results provide an in-depth understanding of the multi-region contact damage mechanism of thermoelectric material.

关键词： Thermoelectric material Two rigid punches Interaction Analytical solutions

Global Trends in Dam Removal and Related Research: A Systematic Review Based on Associated Datasets and Bibliometric Analysis

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Chinese Geographical Science 2019年第1期29卷 1-12页

作者： ding Liuyong CHEN Liqiang ding Chengzhi TAO juan Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Yunnan University Institute of International Rivers and Eco-security Yunnan University

Dam removal has been increasingly reported globally and is becoming an important approach for river management, restoration and environmental conservation in damming rivers. However, current limited knowledge of global trends in dam removal and related research may be potentially biased in terms of the geographic distribution and organisms studied. Such bias could mislead dam removal planning and management in different areas and ecological conservation for different taxa. In this study, we quantitatively and qualitatively analyzed datasets of dam removal and publications of dam removal research using bibliometric methods. A total of 1449 dam removal documents were published from 1953 to 2016. Trends, current hotspots and future directions of dam removal research were identified. The results from this study reveal that dam removal largely occurred in the North America and Europe, and most of the removed dams were small and old dams. With respect to the topic analysis, more dam removal studies should focus on the responses of a wide range of organisms, not only fish, as well as the interspecies relationships, food webs and ecosystem structures and functions. Based on our findings, we also provide some suggestions for future dam removal planning and analysis.

关键词： dam demolition literature research topics weir

IL-17 signaling in skin repair: safeguarding metabolic adaptation of wound epithelial cells

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Signal Transduction and Targeted Therapy 2022年第11期7卷 3982-3984页

作者： juan Wang Xiaolei ding Institute of Geriatrics Affiliated Nantong Hospital of Shanghai University(The Sixth People’s Hospital of Nantong)School of MedicineShanghai University226011NantongChina Shanghai Engineering Research Center of Organ Repair School of MedicineShanghai University200444ShanghaiChina

In a recent paper published in Science,Konieczny et *** that IL-17A produced by RORγt+γδT cells governs wound epithelial cell hypoxic adaptation,which is required for cell migratory activity and efficient re-epithe... 详细信息

关键词： wound RORγt al.

Recent advances of Pd-π-allyl zwitterions in cycloaddition reactions

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Chinese Chemical Letters 2023年第11期34卷 3-19页

作者： juan Du Yun-Fan Li Chang-Hua ding Guangxi Key Laboratory of Natural Polymer Chemistry and Physics College of Chemistry and MaterialsNanning Normal UniversityNanning 530001China Department of Chemistry Shanghai Engineering Research Center of Organ RepairInnovative Drug Research CenterShanghai UniversityShanghai 200444China

Palladium-catalyzed cycloaddition reactions via Pd-π-allyl zwitterions have been established as significant synthetic transformations to enable numerous carbon-or heterocycles compounds that are key constituents of various biologically active natural products and *** addition to the well-known Pd-π-allyl zwitterions,including palladium-trimethylenemethane and Pd-1,3/1,4-zwitterions,chemists have recently discovered new applications of several long ago reported but less-studied Pd-π-allyl zwitterions,which can straightforwardly and efficiently construct novel cyclic ***,some impressive newly designed zwitterions have been also *** zwitterions are diverse and can serve as transient and highly reactive intermediates for the subsequent cyclization with various *** this review,we highlight recent advances in applications of these two types of zwitterions in the synthesis of complex polycyclics and medium-sized cyclic compounds.

关键词： Palladium Cycloaddition Pd-π-allyl zwitterions Asymmetric catalysis Heterocycles

TfOH/Fe（OTf）3 Cocatalyzed Reaction of Arylallenes with Alcohols for Structurally Diverse Indene Derivatives

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Chinese Journal of Chemistry 2018年第8期36卷 737-742页

作者： Congrong Liu Haiyun Zhang Lianghui ding juan Liu School of Environment Engineering Nanjing Institute of Technology 1 Hongjingdadao Nanjing Jiangsu 212167 China Department of Chemistry University of Science and Technology of ChinaHefei Anhui 230026 China

The indene moiety is an important unit because of its presence in many chemical catalysts, functional materials and biologically relevant molecules. Herein, we report a facile reaction of arylallenes with benzylic or allylic alcohols through TfOH/Fe（OTf）3 cocatalyzed cleavage of sp3 carbon-oxygen. In the presence of 5 mol% TfOH and 5 mol% Fe（OTf）3, a range of arylallenes undergo carbocation initiated cyclization reaction with alkyl alcohols to give structurally diverse polysubstituted indenes in good to excellent yields. H2O is the sole byproduct that makes this transformation highly atom-economic and environmentally benign.

关键词： allenes alcohols cocatalyst electrophilic cyclization indenes

Pharmacokinetic evaluation of Shenfu Injection in beagle dogs after intravenous drip administration

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Acta Pharmaceutica Sinica B 2016年第6期6卷 584-592页

作者： Yuqiao Zhang Dali Tian Yuyou Huang Ling Li juan Mao juan Tian Jinsong ding School of Pharmaceutical Sciences Central South University China Resources San-Jiu (Ya’an) Pharmaceutical Co. Ltd.

Shenfu Injection (SFI) is a well-defined Chinese herbal formulation that is obtained from red ginseng and processed aconite root. The main active constituents in SFI are ginsenosides and aconitum alkaloids. In this work, ginsenosides (ginsenoside Rg 1, ginsenoside Rbl and ginsenoside Rc) and aconitum alkaloids (benzoylmesaconine and fuziline) were used as the index components to explore the pharmacokinetic behavior of SFI. A selective and sensitive HPLC MS/MS method was developed for the quantification of ginsenosides and aconitum alkaloids in dog plasma and was used to characterize the pharmacokinetics of the five index components after intravenous drip of three different dosages of SFI in beagle dogs. The pharmacokinetic properties of the index components were linear over the dose range of 2-8 mL/kg. (C) 2016 Chinese Pharmaceutical Association and Institute of Materia Medica, Chinese Academy of Medical Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND

关键词： HPLC-MS/MS Ginsenoside Aconittun alkaloids Phammcokinetics Shenfu Injection Beagle dogs

Model test on dynamic characteristics of invert and foundation soils of high-speed railway tunnel

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Earthquake Engineering and Engineering Vibration 2015年第3期14卷 549-559页

作者： Huang juan Yuan Tieying Peng Limin Yu Jun ding Zude School of Civil Engineering Central South University Faculty of Civil Engineering and Mechanics Kunming University of Science and Technology

A dynamic model test(CL = 4) at different velocities of train,namely different loading frequencies,is carried out to study the dynamic characteristics of a high-speed railway tunnel invert and its foundation *** only are the accelerations,dynamic coefficients,dynamic stresses of the invert and foundation soils emphatically analyzed,their relationship with the velocity of the train are discussed in *** laboratory testing,the attenuation of vibration propagating from up the rails is obtained and the calculation formula of the speed influence coefficient of the tunnel invert is preliminarily *** depth of the foundation soils influenced by vibration is also determined in this *** is shown that the responses of the tunnel invert and foundation soils to vibration are slightly increased with the velocity of the train;circumferential stresses in the bottom of the invert are tensile stresses and maximum stresses appear under the foot of the rails;the dynamic soil pressures of the foundation decrease quickly with the distance away from the tunnel invert and an exponential relationship exists between them.

关键词： high speed railway tunnel dynamic characteristic m

Extreme cold wave in early November 2021 in China and the influences from the meridional pressure gradient over East Asia

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Advances in Climate Change Research 2022年第6期13卷 797-802页

作者： Xiang LI Ying-juan ZHANG Hui GAO Ting ding National Climate Center China Meteorological AdministrationBeijing 100081China Beijing Meteorological Service Beijing 100089China

In early November 2021,China experienced its second strongest cold wave event during *** the Siberian high is considered the main factor influencing cold wave events in East Asia,it was not extremely strong from 4 to November 9,*** spatial distribution of the correlation coefficients between the sea level pressure and the daily temperature anomalies shows a monopole pattern,with a notable negative centre in the southern part of the Siberian high monitoring ***,the correlation between the sea level pressure and temperature drop presents a typical dipole pattern,with a distinct negative centre in the northern monitoring domain and a positive centre in southern East *** the November 2021 super cold wave process,the sea level pressure anomalies display a dipole pattern with a higher centre in the north and a lower centre in the south owing to the northward shift of the Intertropical Convergence *** meridional pressure gradient index clearly reveals the non-negligible effect of subtropical low-pressure on this super cold wave process,indicating its possibly essential supplementary role in enhancing this *** above findings provide a new understanding of its mechanism and long-range forecasts.

关键词： Cold wave Siberian high Meridional pressure gradient Dipole pattern