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| 1 | Simultaneous removal of ammonia and N-nitrosamine precursors from high ammonia water by zeolite and powdered activated carbon显示文摘When adding sufficient chlorine to achieve breakpoint chlorination to source water containing high concentration of ammonia during drinking water treatment, high concentrations of disinfection by-products(DBPs) may form. If N-nitrosamine precursors are present, highly toxic N-nitrosamines, primarily N-nitrosodimethylamine(NDMA), may also form. Removing their precursors before disinfection should be a more effective way to minimize these DBPs formation. In this study, zeolites and activated carbon were examined for ammonia and N-nitrosamine precursor removal when incorporated into drinking water treatment processes.The test results indicate that Mordenite zeolite can remove ammonia and five of seven N-nitrosamine precursors efficiently by single step adsorption test. The practical applicability was evaluated by simulation of typical drinking water treatment processes using six-gang stirring system. The Mordenite zeolite was applied at the steps of lime softening, alum coagulation, and alum coagulation with powdered activated carbon(PAC) sorption. While the lime softening process resulted in poor zeolite performance, alum coagulation did not impact ammonia and N-nitrosamine precursor removal. During alum coagulation, more than67% ammonia and 70%–100% N-nitrosamine precursors were removed by Mordenite zeolite(except 3-(dimethylaminomethyl)indole(DMAI) and 4-dimethylaminoantipyrine(DMAP)). PAC effectively removed DMAI and DMAP when added during alum coagulation. A combination of the zeolite and PAC selected efficiently removed ammonia and all tested seven N-nitrosamine precursors(dimethylamine(DMA), ethylmethylamine(EMA), diethylamine(DEA), dipropylamine(DPA), trimethylamine(TMA), DMAP, and DMAI) during the alum coagulation process. | Runmiao Xue Ariel Donovan Haiting Zhang Yinfa Ma Craig Adams John Yang Bin Hua Enos Inniss Todd Eichholz Honglan Shi | 2018 | Journal of Environmental Sciences2018，30，2： | 7 |
| 2 | Simultaneous determination of catecholamines and polyamines in PC-12 cell extracts by micellar electrokinetic capillary chromatography with ultraviolet absorbance detection显示文摘 | LIU Guan-shu Junnan C Yinfa M | 2004 | Journal of Chromatography B2004，，805： | 1 |
| 3 | A new approach for the design of supramolecular recognition units : Hydrogen-bonded molecular duplexes 显示文摘 | Bing Gong Yinfa Yan Huaqiang Zeng | 1999 | J Am Chem Soc1999，121，： | 1 |
| 4 | Diurnal changes of photosynthetic rate,stomatal conductance and rubisco in rice leaf显示文摘 | Xu Yinfa | 1996 | Acta Photophysiologica Sinica1996，22，1： | 1 |
| 5 | In vitro toxicity of silica nanoparticles in human lung cancer cells显示文摘 | Weisheng Lin Yue-wern Huang Xiao-Dong Zhou Yinfa Ma | 2006 | Toxicology and Applied Pharmacology2006，，3： | 1 |
| 6 | Biomimetic catalytic system driven by electron transfer for selective oxygenation of hydrocarbon 显示文摘 | Yang Guanyu Ma Yinfa Xu Jie | 2004 | J Am Chem Soc2004，126，10： | 1 |
| 7 | Evaluation of hydroxyapatite microspheres made from a borate glass to separate protein mixtures显示文摘 | Xue Han Ming Du Yinfa Ma Delbert E. Day | 2008 | Journal of Materials Science2008，，16： | 1 |
| 8 | Isolation and quantification of ergovaline from festuca arundinacea (tall fescue) infected with the fungus acremonium coenophialum by high-performance capillary electrophoresis 显示文摘 | Yinfa M Kevin G M Dawood A | 1993 | Journal of Chromatography A1993，652，： | 1 |
| 9 | Toxicity of nano- and micro-sized ZnO particles in human lung epithelial cells显示文摘 | Weisheng Lin Yi Xu Chuan-Chin Huang Yinfa Ma Katie B. Shannon Da-Ren Chen Yue-Wern Huang | 2009 | Journal of Nanoparticle Research2009，，1： | 1 |
| 10 | Signatures of functional constraint at Fgfr1a Genes in schizothoracine fishes (Pisces: Cypriniformes): The dermal skeleton variation adapted to high-altitude environments显示文摘Fishes harbor a huge resource of phenotypic diversity and are useful for understanding the genetic basis of morphological variation.However,it is difficult to transfer classical genetic mapping to most non-model species.In this study,we performed a comparative sequence analysis of Fgfr1a to first interpret the evolution of this candidate scale-loss gene in 15 schizothoracine fishes with various scale phenotypes.While considerable amino acid(AA)substitutions were observed,molecular evolution analysis indicates that the overall coding regions were subject to functional constraint.We also identified extra copies of Fgfr1a in 4 scale-loss fishes and detected accelerated evolution in one AA substitution specific to these duplicates.We speculate that Fgfr1a had accumulated mutations in the ancestral lineage of scale-loss schizothoracine fishes before experiencing duplication events,which was further followed by the diversification of species.In silico mutation analysis predicted deleterious effects of the mutations while no disruptive molecular mechanism was detected.Collectively,our results highlight the important role of Fgfr1a gene in the adaptive evolution of schizothoracine fishes during their radiation in the Qinghai-Tibetan Plateau. | Xinyi GUO Ling XIE Xuze ZHANG Yinfa JI Juan CHEN Bo PANG Yongtao XU Delin QI Songchang GUO | 2016 | Integrative Zoology2016，11，2： | 0 |
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