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| 1 | Bioreduction of nitrate in groundwater using a pilot-scale hydrogen-based membrane biofilm reactor显示文摘A long-term pilot-scale H_(2)-based membrane biofilm reactor(MBfR)was tested for removal of nitrate from actual groundwater.A key feature of this secondgeneration pilot MBfR is that it employed lower cost polyester hollow fibers and still achieved high loading rate.The steady-state maximum nitrate surface loading at which the effluent nitrate and nitrite concentrations were below the Maximum Contaminant Level(MCL)was at least 5.9 g·N·(m^(2)·d)^(–1),which corresponds to a maximum volumetric loading of at least 7.7 kg·N·(m^(3)·d)^(–1).The steady-state maximum nitrate surface area loading was higher than the highest nitrate surface loading reported in the firstgeneration MBfRs using composite fibers(2.6 g·N·(m^(2)·d)^(–1)).This work also evaluated the H_(2)-utilization efficiency in MBfR.The measured H_(2)supply rate was only slightly higher than the stoichiometric H_(2)-utilization rate.Thus,H_(2)utilization was controlled by diffusion and was close to 100%efficiency,as long as biofilm accumulated on the polyester-fiber surface and the fibers had no leaks. | Youneng TANG Michal ZIV-EL Chen ZHOU Jung Hun SHIN Chang Hoon AHN Kerry MEYER Daniel CANDELARIA David FRIESE Ryan OVERSTREET Rick SCOTT Bruce ERITTMANN | 2010 | Frontiers of Environmental Science & Engineering2010，4，3： | 4 |
| 2 | Analytical solution of anisotropic plastic deformation induced by micro-scale laser shock peening显示文摘 | Youneng W Kysar J W Yao Y L | | 0，，03： | 1 |
| 3 | Unsplit perfectly matched layer for acoustic field simulation based on second-order wave equation显示文摘The Perfectly Matched Layer(PML) is an effective absorbing boundary and has been widely used in acoustic simulation.In order to develop an absorbing boundary condition for numerical simulation based on the second-order acoustic wave equation,an Unsplit PML algorithm is proposed.Firstly,frequency-domain expression of this method is formulated based on the complex stretching coordinate schema.Then,its time-domain expression is derived by formulating auxiliary differential equations.Finally,relative theoretical analysis and numerical simulations are carried out,the results of which demonstrate that compared with the existing Split PMLs,the proposed method has the same absorbing efficiency and can reduce storage greatly.It can also increase calculation efficiency with easier implementation. | MA Youneng YU Jinhua WANG Yuanyuan | 2013 | Chinese Journal of Acoustics2013，32，4： | 1 |
| 4 | Youle A Cytotoxic Ribonuclease 显示文摘 | YouNeng Wu Richard J | 1993 | The Journal of Biological Chemistry1993，268，10： | 1 |
| 5 | Study of anisotropic character induced by microscale laser shock peening on a single crystal aluminum 显示文摘 | Chen Hongqiang Wang Youneng Jeffrey W Kysar | 2007 | Journal of Applied Physics2007，101，2： | 1 |
| 6 | Energy level effects on deformation mechanism in micro-scale laser peen forming显示文摘 | Youneng Wang Yajan Fan Sinisa Vukelic | 2006 | Transactions of the North American Manufacturing Research Institute of SME2006，34，： | 1 |
| 7 | 肝血管肉瘤7例临床分析(英文)显示文摘Objective:The aim of our study was to evaluate and sum up the experience with hepatic angiosarcoma.Methods:Retrospective study of 7 patients with hepatic angiosarcoma.Results:Symptoms and signs such as abdominal pain were extremely nonspecific.The levels of the tumor markers were within the normal range.Four cases were positive for hepatitis B viruses.Among the 5 patients who received chemotherapy,improvement in survival was seen in 3 cases which also received surgery.Conclusion:Hepatic angiosarcoma is a rare and difficult-to-diagnose malignant liver tumor.Surgery is the definitive treatment and adjuvant chemotherapy after surgery may improve survival. | Dongzhi Yin Qichang Zheng Youneng Yuan | 2011 | The Chinese-German Journal of Clinical Oncology2011，10，8： | 1 |
| 8 | Contributions of adsorption, bioreduction and desorption to uranium immobilization by extracellular polymeric substances显示文摘Hexavalent uranium(U(VI))can be immobilized by various microbes.The role of extracellular polymeric substances(EPS)in U(VI)immobilization has not been quantified.This work provides a model framework to quantify the contributions of three processes involved in EPS-mediated U(VI)immobilization:adsorption,bioreduction and desorption.Loosely associated EPS was extracted from a pure bacterial strain,Klebsiella sp.J1,and then exposed to H_(2) and O_(2)(no bioreduction control)to immobilize U(VI)in batch experiments.U(VI)immobilization was faster when exposed to H_(2) than O_(2) and stabilized at 94%for H_(2) and 85%for O_(2),respectively.The non-equilibrium data from the H_(2) experiments were best simulated by a kinetic model consisting of pseudo-second-order adsorption(ka=2.87×10^(−3) g EPS·(mg U)^(−1)·min^(−1)),first-order bioreduction(kb=0.112 min−1)and first-order desorption(kd=7.00×10^(−3) min^(−1))and fitted the experimental data with R^(2) of 0.999.While adsorption was dominant in the first minute of the experiments with H_(2),bioreduction was dominant from the second minute to the 50th min.After 50 min,adsorption was negligible,and bioreduction was balanced by desorption.This work also provides the first set of equilibrium data for U(VI)adsorption by EPS alone.The equilibrium experiments with O_(2) were well simulated by both the Langmuir isotherm and the Freundlich isotherm,suggesting multiple mechanisms involved in the interactions between U(VI)and EPS.The thermodynamic study indicated that the adsorption of U(VI)onto EPS was endothermic,spontaneous and favorable at higher temperatures. | Chen Zhou Ermias Gebrekrstos Tesfamariam Youneng Tang Ang Li | 2023 | Frontiers of Environmental Science & Engineering2023，17，9： | 0 |
| 9 | Determination of growth kinetics of microorganisms linked with 1,4-dioxane degradation in a consortium based on two improved methods显示文摘The conventional method for determining growth kinetics of microbial consortia relies on the total biomass concentration.This may be inaccurate for substrates that are uncommon in nature and can only be degraded by a small portion of the microbial community.1,4-dioxane,an emerging contaminant,is an example of such substrates.In this work,we evaluated an improved method for determining the growth kinetics of a 1,4-dioxane-degrading microbial consortium.In the improved method,we considered only bacterial taxa whose concentration increase correlated to 1,4-dioxane concentration decrease in duplicate microcosm tests.Using PEST(Parameter Estimation),a modelindependent parameter estimator,the kinetic constants were estimated by fitting the Monod kineticsbased simulation results to the experimental data that consisted of the concentrations of 1,4-dioxane and the considered bacterial taxa.The estimated kinetic constants were evaluated by comparing the simulation results with experimental results from another set of microcosm tests.The evaluation was quantified by the sum of squared relative residual,which was four orders of magnitude lower for the improved method than the conventional method.By further dividing the considered bacterial taxa into oligotrophs and copiotrophs,the sum of squared relative residual further decreased. | Yi Xiong Boya Wang Chao Zhou Huan Chen Gang Chen Youneng Tang | 2022 | Frontiers of Environmental Science & Engineering2022，16，5： | 0 |
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