|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Photochemical oxidation of dimethylsulfide in seawater显示文摘Dimethylsulfide(DMS) is generally thought to be lost from the surface oceans by evasion into the atmosphere as well as consumption by microbe.However,photochemical process might be important in the removal of DMS in the oceanic photic zone.A kinetic investigation into the photochemical oxidation of DMS in seawater was performed.The photo-oxidation rates of DMS were influenced by various factors including the medium,dissolved oxygen,photosensitizers,and heavy metal ions.The photo-oxidation rates of DMS were higher in seawater than in distilled water,presumably due to the effect of salinity existing in seawater.Three usual photosensitizers(humic acid,fulvic acid and anthroquinone),especially in the presence of oxygen,were able to enhance the photo-oxidation rate of DMS,with the fastest rate observed with anthroquinone.Photo-oxidation of DMS followed first order reaction kinetics with the rate constant ranging from 2.5×10-5 to 34.3×10-5 s-1.Quantitative analysis showed that approximately 32% of the photochemically removed DMS was converted to dimethylsulfoxide.One of the important findings was that the presence of Hg2+ could markedly accelerate the photo-oxidation rate of DMS in seawater.The mechanism of mercuric catalysis for DMS photolysis was suggested according to the way of CTTM(charge transfer to metal) of DMS-Hg2+ complex. | YANG Guipeng LI Chengxuan QI Jialin HU Lige HOU Haijun | 2007 | Acta Oceanologica Sinica2007，26，5： | 4 |
| 2 | Cascaded Multilevel Inverter Based Power and Signal Multiplex Transmission for Electric Vehicles显示文摘Power&signal multiplex transmission(P&SMT)is a technique that uses power electronic circuits for communication signal transmission.In this paper,a three-phase cascaded multilevel inverter-based P&S MT system is proposed.The proposed method can transmit communication signals without using a Controller Area Network bus,thereby reducing the wiring cost of the conventional electric vehicle(EV)communication system.The designed system can achieve motor speed regulation and battery balance discharging for EVs.With the combined pulse width modulation scheme and frequency shift keying method,both power and communication signals are transmitted successfully in a simulation model implemented in Matlab/Simulink.By evaluating the bit error rate of the transmitted signal,the maximum signal rate of the proposed system is determined as 600 bit/s. | Yixuan Zhang Guipeng Chen Yihua Hu Chao Gong Yangang Wang | 2020 | CES Transactions on Electrical Machines and Systems2020，4，2： | 4 |
| 3 | High and ultra-stable energy storage from all-carbon sodium-ion capacitor with 3D framework carbon as cathode and carbon nanosheet as anode显示文摘Sodium-ion capacitors(SICs)are extremely promising due to the combined merits of high energy-power characteristics and considerable price advantage.However,it is still difficult to achieve high energypower outputs and cycle stability in a typical configuration of the metal-based battery-type anode and activated carbon capacitor-type cathode due to the kinetic mismatching.In this work,a carbon nanosheet(PSCS-600)with large interlayer spacing of 0.41 nm derived from the bio-waste pine cone shell was prepared.Besides,the covalent triazine framework derived carbon(OPDN-CTF-A)was obtained through ionothermal synthesis strategy,exhibiting beneficial hierarchical pores(0.5-6 nm)and high heteroatoms(5.6 at%N,6.6 at%O).On this basis,the all-carbon SICs were fabricated by the integration of PSCS-600 anode and OPDN-CTF-A cathode.The device delivered high energy density 111 Wh kg^(-1),high power output of 14,200 W kg^(-1) and ultra-stable cycling life(~90.7%capacitance retention after 10,000 cycles).This work provides new ideas in fabricating carbon-carbon architectural SICs with high energy storage for practical application. | Fangyuan Hu Siyang Liu Shengming Li Cheng Liu Guipeng Yu Ce Song Wenlong Shao Tianpeng Zhang Xigao Jian | 2021 | Journal of Energy Chemistry2021，30，4： | 2 |
| 4 | Improving succinate production by engineering oxygen‑dependent dynamic pathway regulation in Escherichia coli显示文摘Succinate is an important building block for chemical synthesis.However,during the fermentation process,excessive osmotic stress and byproduct accumulation substantively impair the performance of the microbial cell factory.To this end,two strategies were proposed.First,an osmo-tolerant mutant,Escherichia coli FMME-N-2,was screened by combined mutagenesis(ARTP and^(60)Co-γirradiation)to produce 51.8 g L^(−1)succinate with a productivity of 0.81 g L^(−1)h^(−1).Second,an oxygen-dependent bifunctional switch(OBS)was developed with promoter PfnrF8-based activation and tobacco etch virus protease-based inhibition functions.With ribosomal binding site(RBS)and degron optimization of OBS,the optimal strain E.coli FMME-N-30 achieved a succinate titer and productivity of 119 g L^(−1)and 1.65 g L^(−1) h^(−1),respectively,in a 30-L fermentor,while only 7.1 g L^(−1)acetate and no formate or lactate were detected.Compared to the wild-type strain E.coli FMME-N,the succinate titer was increased by 3.3-fold.These results highlight the applicability of OBS for the large-scale production of value-added chemicals. | Cong Gao Wenxiu Tang Liang Guo Guipeng Hu Jia Liu Liming Liu Xiulai Chen | 2022 | Systems Microbiology and Biomanufacturing2022，2，2： | 1 |
| 5 | Metabolic engineering of Streptomyces to enhance the synthesis of valuable natural products显示文摘The mycelial bacterium Streptomyces is a workhorse for producing natural products,serving as a key source of drugs and other valuable chemicals.However,its complicated life cycle,silent biosynthetic gene clusters(BGCs),and poorly characterized metabolic mechanisms limit efficient production of natural products.There-fore,a metabolic engineering strategy,including traditional and emerging tools from different disciplines,was developed to further enhance natural product synthesis by Streptomyces.Here,current trends in systems metabolic engineering,including tools and strategies,are reviewed.Particularly,this review focuses on recent developments in the selection of methods for regulating the Streptomyces life cycle,strategies for the activation of silent gene clusters,and the exploration of regulatory mechanisms governing antibiotic production.Finally,future challenges and prospects are discussed. | Zuwei Xu Lihao Ji Wenxiu Tang Liang Guo Cong Gao Xiulai Chen Jia Liu Guipeng Hu Liming Liu | 2022 | Engineering Microbiology2022，2，2： | 0 |
| 6 | Current state and future perspectives of cytochrome P450 enzymes for C-H and C=C oxygenation显示文摘Cytochrome P450 enzymes(CYPs)catalyze a series of C-H and C=C oxygenation reactions,including hydroxylation,epoxidation,and ketonization.They are attractive biocatalysts because of their ability to selectively introduce oxygen into inert molecules under mild conditions.This review provides a comprehensive overview of the C-H and C=C oxygenation reactions catalyzed by CYPs and the various strategies for achieving higher selectivity and enzymatic activity.Furthermore,we discuss the application of C-H and C=C oxygenation catalyzed by CYPs to obtain the desired chemicals or pharmaceutical intermediates in practical production.The rapid development of protein engineering for CYPs provides excellent biocatalysts for selective C-H and C=C oxygenation reactions,thereby promoting the development of environmentally friendly and sustainable production processes. | Yu Yan Jing Wu Guipeng Hu Cong Gao Liang Guo Xiulai Chen Liming Liu Wei Song | 2022 | Synthetic and Systems Biotechnology2022，7，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员