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| 1 | Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu显示文摘The effect of cyanobacterial bloom decay on water quality and the complete degradation of cyanobacterial blooms in a short period were examined by an enclosure experiment in Gonghu Bay of Lake Taihu,China.Water quality parameters as well as taste and odor compounds during the breakdown of cyanobacterial blooms were measured.Results showed that the decay of cyanobacterial blooms caused anoxic water conditions,decreased pH,and increased nutrient loading to the lake water.The highest concentrations of dimethyl sulfide (DMS),dimethyl trisulfide (DMTS),and β-cyclocitral were observed in the anoxic water,at 62331.8,12413.3,and 1374.9 ng/L,respectively.2-Methylisoborneol was dominant during the live growth phase of cyanobacterial blooms,whereas DMS and DMTS were dominant during the decomposition phase.Dissolved oxygen,pH,and chlorophyll a were negatively correlated with DMS,DMTS,and β-cyclocitral,whereas total phosphorus,total nitrogen,and ammonium (NH4+-N) were positively correlated with DMS,DMTS,β-cyclocitral,and β-ionone.The experimental results suggested that preventing the anaerobic decomposition of cyanobacterial blooms is an important strategy against the recurrence of a malodor crisis in Lake Taihu. | Zhimei Ma Yuan Niu Ping Xie Jun Chen Min Tao Xuwei Deng | 2013 | Journal of Environmental Sciences2013，25，3： | 9 |
| 2 | Microcystis aeruginosa/Pseudomonas pseudoalcaligenes interaction effects on off-flavors in algae/bacteria co-culture system under different temperatures显示文摘We conducted an experiment to study the interaction effects of Microcystis aeruginosa and Pseudomonas pseudoalcaligenes on off-flavors in an algae/bacteria co-culture system at three temperatures(24, 28 and 32℃). Gas chromatography–mass spectrometry was applied to measure off-flavor compounds dimethyl sulfide(DMS), dimethyl trisulfide(DMTS),2-methylisoborneol, geosmin(GEO) and β-cyclocitral. During the lag phase of co-cultured M. aeruginosa(first 15 days), P. pseudoalcaligenes significantly increased the production of DMS, DMTS and β-cyclocitral at all three temperatures. In the exponential phase of co-cultured M. aeruginosa(after 15 days), M. aeruginosa became the main factor on off-flavors in the co-culture system, and β-cyclocitral turned to the highest off-flavor compound. These results also indicated that DMS, DMTS and β-cyclocitral were the main off-flavor compounds in our M. aeruginosa/P. pseudoalcaligenes co-culture system. Univariate analysis was applied to investigate the effects of M. aeruginosa and P. pseudoalcaligenes on the production of off-flavors. The results demonstrated that both M. aeruginosa and P. pseudoalcaligenes could increase the production of DMS and DMTS, while β-cyclocitral was mainly determined by M. aeruginosa. Our results also provide some insights into understanding the relationship between cyanobacteria and heterotrophic bacteria. | Xi Yang Ping Xie Yunzhen Yu Hong Shen Xuwei Deng Zhimei Ma Peili Wang Min Tao Yuan Niu | 2015 | Journal of Environmental Sciences2015，27，5： | 4 |
| 3 | Eco-chemical mechanisms govern phytoplankton emissions of dimethylsulfide in global surface waters显示文摘The anti-greenhouse gas dimethylsulfide(DMS)is mainly emitted by algae and accounts for more than half of the total natural flux of gaseous sulfur to the atmosphere,strongly reducing the solar radiation and thereby the temperature on Earth.However,the relationship between phytoplankton biomass and DMS emissions is debated and inconclusive.Our study presents field observations from 100 freshwater lakes,in concert with data of global ocean DMS emissions,showing that DMS and algal biomass show a hump-shaped relationship,i.e.DMS emissions to the atmosphere increase up to a p H of about 8.1 but,at higher p H,DMS concentrations decline,likely mainly due to decomposition.Our findings from lake and ocean ecosystems worldwide were corroborated in experimental studies.This novel finding allows assessments of more accurate global patterns of DMS emissions and advances our knowledge on the negative feedback regulation of phytoplankton-driven DMS emissions on climate. | Xuwei Deng Jun Chen Lars-Anders Hansson Xia Zhao Ping Xie | 2021 | National Science Review2021，8，2： | 1 |
| 4 | Simultaneous determination of eight common odors in water boby using automatic purge and trap coupled to gas chromatography with mass spectrometry 显示文摘 | Deng Xuwei Liang Gaodao Chen Jun | 2011 | J Chromatography A2011，，1218： | 1 |
| 5 | Simulta-neous determination of eight common odors in naturalwater body using automatic purge and trap coupled to gaschromatography with mass spectrometry 显示文摘 | Deng Xuwei Liang Gaodao Chen Jun | 2011 | Journal ofChromatography A2011，1218，24： | 1 |
| 6 | Simultaneous determination of eight common odors in natural water body using automatic purge and trap coupled to gas chromatography with mass spectrometry显示文摘 | DENG Xuwei LIANG Gaodao CHEN Jun | 2011 | J Chromatogr A2011，1218，24： | 1 |
| 7 | Microwave-assisted purge- and-trap extraction device coupled with gas chromatography and mass spectrometry for the determination of five predominant odors in sediment, fish tissues, and algal cells 显示文摘 | DENG Xuwei XIE Ping Q! Min | 2012 | J Chromatogr A2012，1219，： | 1 |
| 8 | Simultaneous determination of eight common odors in natural water body using automatic purge and trap coupled to gas chromatography with mass spectrometry显示文摘 | Xuwei Deng Gaodao Liang Jun Chen Min Qi Ping Xie | 2011 | Journal of Chromatography A2011，，24： | 1 |
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