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| 1 | Interactively interfacial reaction of iron-reducing bacterium and goethite for reductive dechlorination of chlorinated organic compounds显示文摘The interactively interfacial reactions between the iron-reducing bacterium (Shewanella decolorationis, S12) and iron oxide (α-FeOOH) were investigated to determine reductive dechlorination transformation of chlorinated organic compounds (chloroform and pentachlorophenol). The results showed that the interactive system of S12+ α-FeOOH exhibited relatively high dechlorination rate. By comparison, the S12 biotic system alone had no obvious dechlorination, and the α-FeOOH abiotic system showed low dechlorination rate. The enhanced dechlorination of chloroform and pentachlorophenol in the interactive system of S12+α-FeOOH was derived from the promoted generation of adsorbed Fe(Ⅱ) by S12. A decrease in redox potential of the Fe(Ⅲ)/Fe(Ⅱ) couple in the interactive reaction system was determined by cyclic voltammetry. Our results will give new insight into interactively interfacial reaction between iron-reducing bacterium and iron oxides for degradation of chlorinated organic compounds under anaerobic condition. | LI XiaoMin LI YongTao LI FangBai ZHOU ShunGui FENG ChunHua LIU TongXu | 2009 | Chinese Science Bulletin2009，54，16： | 11 |
| 2 | Herbicide promotes the conjugative transfer of multi-resistance genes by facilitating cellular contact and plasmid transfer显示文摘The global dissemination of antibiotic resistance genes(ARGs),especially via plasmid-mediated horizontal transfer,is becoming a pervasive health threat.While our previous study found that herbicides can accelerate the horizontal gene transfer(HGT)of ARGs in soil bacteria,the underlying mechanisms by which herbicides promote the HGT of ARGs across and within bacterial genera are still unclear.Here,the underlying mechanism associ-ated with herbicide-promoted HGT was analyzed by detecting intracellular reactive oxygen species(ROS)production,extracellular polymeric substance composition,cell membrane integrity and proton motive force combined with genome-wide RNA sequencing.Exposure to herbicides induced a series of the above bacterial responses to promote HGT except for the ROS response,including compact cell-to-cell contact by enhancing pilus-encoded gene expression and decreasing cell surface charge,increasing cell membrane permeability,and enhancing the proton motive force,providing additional power for DNA uptake.This study provides a mechanistic understanding of the risk of bacterial resistance spread promoted by herbicides,which elucidates a new perspective on nonantibiotic agrochemical acceleration of the HGT of ARGs. | Xi Li Chang Wen Chen Liu Shiyun Lu Zhongbing Xu Qiue Yang Zhi Chen Hanpeng Liao Shungui Zhou | 2022 | Journal of Environmental Sciences2022，34，5： | 2 |
| 3 | Manganese dioxide as an alternative cathodic catalyst to platinum in microbial fuel cells显示文摘 | Lixia Zhang Chengshuai Liu Li Zhuang Weishan Li Shungui Zhou Jintao Zhang | 2009 | Biosensors and Bioelectronics2009，，9： | 1 |
| 4 | In-situ and quantitative analysis of aged silicone rubber materials with laser-induced breakdown spectroscopy显示文摘Due to their weak weather ability,the ageing process of organic silicone rubber composites remarkably influences the service performance of composite insulators and bushings,especially in high-voltage transmission lines.In this study,laser-induced breakdown spectroscopy(LIBS)was used for analysing ageing composite insulator sheds for potential on-site application.A spectrum was recorded after each laser pulse and the element composition of ablated materials with different depth was observed.A calibration curve that revealed linear relationship between C,Si,Al spectrum line intensity and corresponding element concentration was established with the result of X-ray photoelectron spectroscopy test.Regularly line intensities of C,Si and Al changed dramatically from the surface to the bulk layer.Given the number of laser pulses with varying element concentrations,as well as the linear relationship described above,the depth of ageing layer could be calculated immediately.Also,the result was verified by secondary ion mass spectrometry and scanning electron microscope.LIBS method can be a promising and efficient technique to assess the ageing state of composite materials on site. | Wang Xilin Hong Xiao Chen Ping Zhao Chenlong Jia Zhidong Wang Liming Lv Qishen Huang Ronghui Liu Shungui | 2018 | High Voltage2018，3，2： | 1 |
| 5 | Nitrogen doped hollow carbon nanospheres as efficient polysulfide restricted layer on commercial separators for high-performance lithium-sulfur batteries显示文摘The polysulfide shuttle limits the development of lithium-sulfur(Li-S) batteries with high energy density and long lifespan. Herein, nitrogen doped hollow carbon nanospheres(NHCS) derived from polymerization of dopamine on SiO_(2)nanospheres are employed to modify the commercial polypropylene/polyethylene/polypropylene tri-layer separators(PP/PE/PP@NHCS). The abundant nitrogen heteroatoms in NHCS exhibit strong chemical adsorption toward polysulfides, which can effectively suppress the lithium polysulfides shuttle and further enhance the utilization of active sulfur. Lithium-sulfur batteries employing the PP/PE/PP@NHCS deliver an initial discharge capacity of 1355 mAh/g and retain high capacity of 921 mAh/g after 100 cycles at 0.2 C. At a high rate of 2 C, the lithium-sulfur batteries exhibit capacity of 461 mAh/g after 1000 cycles with a capacity fading rate of 0.049% per cycle. This work demonstrates that the NHCS coated PP/PE/PP separator is promising for future commercial applications of lithium-sulfur batteries with improved electrochemical performances. | Yue Zhao Zhi Gu Wei Weng Dan Zhou Ziqiang Liu Wentong Fan Shungui Deng Hao He Xiayin Yao | 2023 | Chinese Chemical Letters2023，34，2： | 0 |
| 6 | Humic acid-enhanced electron transfer of in vivo cytochrome c as revealed by electrochemical and spectroscopic approaches显示文摘Out-membrane cytochrome c(Cyt c) plays an important role carrying electrons from the inside of microbes to outside electron acceptors. However, the active sites of Cyt c are wrapped by nonconductive peptide chains, hindering direct extracellular electron transfer(EET). Humic acids(HA) have been previously proven to efficiently facilitate EET. However, the inherent mechanism of HAstimulated EET has not been well interpreted. Here, to probe the mechanism behind HA-stimulated EET, we studied the interaction between Cyt c and HA. The attachment of active in vivo Cyt c on a graphite electrode was achieved when MR-1 cells were self-assembled on the electrode surface. Pure horse-heart Cyt c was covalently immobilized on an electrode via 4-aminobenzoic acid to create an active in vitro Cyt c-enriched surface. Cyclic voltammetric measurements and scanning electron microscopy confirmed the immobilization of bacterial cells and pure Cyt c protein. Electrochemical methods revealed that HA could enhance the electrocatalytic current of both in vitro and in vivo Cyt c towards oxygen and thiosulfate, suggesting enhanced EET. The blue-shifted soret band in the UV-Vis spectra and changes in the excitation/emission matrix fluorescence spectra demonstrated that Cyt c interacted with HA to form organic complexes via electrostatic or hydrogen-bonding interactions. The results will help understand electron shuttle-stimulated EET and develop bacteriabased bioremediation and bioenergy technologies. | Jiahuan Tang Yi Liu Yong Yuan Shungui Zhou | 2014 | Journal of Environmental Sciences2014，26，5： | 0 |
| 7 | Combining biological denitrification and electricity generation in methane-powered microbial fuel cells显示文摘Methane has been demonstrated to be a feasible substrate for electricity generation in microbial fuel cells(MFCs)and denitrifying anaerobic methane oxidation(DAMO).However,these two processes were evaluated separately in previous studies and it has remained unknown whether methane is able to simultaneously drive these processes.Here we investigated the co-occurrence and performance of these two processes in the anodic chamber of MFCs.The results showed that methane successfully fueled both electrogenesis and denitrification.Importantly,the maximum nitrate removal rate was significantly enhanced from(1.4±0.8)to(18.4±1.2)mg N/(L·day)by an electrogenic process.In the presence of DAMO,the MFCs achieved a maximum voltage of 610 mV and a maximum power density of 143±12 mW/m^(2).Electrochemical analyses demonstrated that some redox substances(e.g.riboflavin)were likely involved in electrogenesis and also in the denitrification process.High-throughput sequencing indicated that the methanogen Methanobacterium,a close relative of Methanobacterium espanolae,catalyzed methane oxidation and cooperated with both exoelectrogens and denitrifiers(e.g.,Azoarcus).This work provides an effective strategy for improving DAMO in methane-powered MFCs,and suggests that methanogens and denitrifiers may jointly be able to provide an alternative to archaeal DAMO for methane-dependent denitrification. | Linpeng Yu Eryi Zhang Lin Yang Shiqi Liu Christopher Rensing Shungui Zhou | 2023 | Journal of Environmental Sciences2023，，8： | 0 |
| 8 | Fungi dominate denitrification when Chinese milk vetch green manure is used in paddy soil显示文摘Fungi play an important role in soil nitrous oxide(N_(2)O)emission in many agricultural soil systems.However,the effect of fungi on N_(2)O emission in Chinese milk vetch(CMV)-containing soils has not been examined sufficiently.This study investigated the contribution of bacteria and fungi to soil N_(2)O emission in CMV-amended soils.We compared soils from an experimental field in the Fujian Academy of Agricultural Sciences that had been treated with 30000 kg of CMV per 667 m2 per year with one that was not treated with CMV.We incubated soil using cycloheximide and streptomycin to differentiate fungal and bacterial N_(2)O emissions,respectively.Quantitative PCR(qPCR)was performed to investigate bacterial and fungal abundances in the two agricultural soil ecosystems.The contribution of fungi to soil N_(2)O emission in CMV-amended soils was greater than that in nonCMV-amended paddy soils,with fungi accounting for more than 56%of the emissions in CMVamended soils.Quantitative PCR showed that the ratio of the internal transcribed spacer to 16S rDNA was significantly higher in CMV-amended soils than in non-CMV-amended paddy soils.Furthermore,soil properties,such as pH(P<0.05)and NH_(4)^(+)concentration(P<0.05),significantly and negatively affected N_(2)O emission by fungi in soil,whereas the total organic carbon(P<0.05)and NO3–concentration(P<0.05)showed significant positive effects.Fungi may be important contributors to N_(2)O production in CMV-amended soils,which may create challenges for mitigating N_(2)O production. | Minghe Jiang Luan Zhang Ming Liu Han Qiu Shungui Zhou | 2022 | Soil Ecology Letters2022，4，2： | 0 |
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