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| 1 | Long-term effects of environmentally relevant concentrations of silver nanoparticles on microbial biomass, enzyme activity,and functional genes involved in the nitrogen cycle of loamy soil显示文摘The increasing production and use of engineered silver nanoparticles(AgNP) in industry and private households are leading to increased concentrations of AgNP in the environment. An ecological risk assessment of AgNP is needed, but it requires understanding the long term effects of environmentally relevant concentrations of AgNP on the soil microbiome. Hence, the aim of this study was to reveal the long-term effects of AgNP on soil microorganisms. The study was conducted as a laboratory incubation experiment over a period of one year using a loamy soil and AgNP concentrations ranging from 0.01 to 1 mg AgNP/kg soil. The short term effects of AgNP were, in general, limited.However, after one year of exposure to 0.01 mg AgNP/kg, there were significant negative effects on soil microbial biomass(quantified by extractable DNA; p = 0.000) and bacterial ammonia oxidizers(quantified by amo A gene copy numbers; p = 0.009). Furthermore, the tested AgNP concentrations significantly decreased the soil microbial biomass, the leucine aminopeptidase activity(quantified by substrate turnover; p = 0.014), and the abundance of nitrogen fixing microorganisms(quantified by nif H gene copy numbers; p = 0.001). The results of the positive control with Ag NO3 revealed predominantly stronger effects due to Ag+ion release. Thus, the increasing toxicity of AgNP during the test period may reflect the long-term release of Ag+ions. Nevertheless, even very low concentrations of AgNP caused disadvantages for the microbial soil community, especially for nitrogen cycling, and our results confirmed the risks of releasing AgNP into the environment. | Anna-Lena Grün Susanne Straskraba Stefanie Schulz Michael Schloter Christoph Emmerling | 2018 | Journal of Environmental Sciences2018，30，7： | 7 |
| 2 | Inflammation and Alzheimer’s disease显示文摘 | Haruhiko Akiyama Steven Barger Scott Barnum Bonnie Bradt Joachim Bauer Greg M Cole Neil R Cooper Piet Eikelenboom Mark Emmerling Berndt L Fiebich Caleb E Finch Sally Frautschy W.S.T Griffin Harald Hampel Michael Hull Gary Landreth Lih–Fen Lue Robert Mrak | 2000 | Neurobiology of Aging2000，，3： | 2 |
| 3 | An Expedmen-tal Study of Social Tagging Behavior and lmage Content 显示文摘 | Golbeck Jennifer Koepfler Jes Emmerling Beth | 2011 | Journal of The American Society for Information Science and Technology2011，，9： | 1 |
| 4 | Aerogels-recent progress in production techniques and novel applications显示文摘 | Fricke J Emmerling A | 1998 | J Sol-Gel Science and Technology1998，13，13： | 1 |
| 5 | Methods For Evaluating Human Impact On Soil Microorganisms Based On Their activity, biomass,and diversity in agricultural soils显示文摘 | Joergensen R G Emmerling C | 2006 | Journal of Plant Nutrition and Soil Science2006，169，3： | 1 |
| 6 | Response of soil microbial biomass and activity to agriculture de-intensification over a 10 year period显示文摘 | Emmerling C Udelhoven T Schr(o)der D | 2001 | Soil Biology & Biochemistry2001，33，： | 1 |
| 7 | Aerogels recent progress in production techniques and novel applications显示文摘 | Fricke J Emmerling A | 1998 | Journal of Sol Gel Science and Technology1998，13，： | 1 |
| 8 | Inactivation of the Fto gene protects from obesity显示文摘 | Fischer J Koch L Emmerling C | 2009 | Nature2009，458，7240： | 1 |
| 9 | Impact of application of organic waste materials on microbial and enzyme activities of mine soils in the Lusatian coal mining region 显示文摘 | EMMERLING C LIEBNER C HAUBOLD-ROSAR M | 2000 | Plant & Soil2000，220，1： | 1 |
| 10 | Inactivation of the Fto gene protects from obesity 显示文摘 | Fischer J Koch L Emmerling C | 2009 | Nature2009，458，： | 1 |
| 11 | High lev- els of circulating Abeta42 are sequestered by plasma proteins in Alzheimer's disease显示文摘 | KUO Y M EMMERLING M R LAMPERT H C | 1999 | Biochem Biophys Res Comman1999，257，3： | 1 |
| 12 | Therapeutic inter-vention in dementia显示文摘 | Davis RE Emmerling MR Jaen JC | 1992 | Critical reviews in neurobiology1992，7，1： | 1 |
| 13 | Water-soluble AI3 (N-40, N-42) oligomers in normal and Alzheimer disease brains 显示文摘 | Kuo Yu-Min Mark R Emmerling Carmen Vigo-Pelfrey | 1996 | J Bio Chem1996，271，8： | 1 |
| 14 | Aerogels--recent progress in productions, techniques and novel application显示文摘 | FRICKE J EMMERLING A | 1998 | J Sol-Gel Sci Technol1998，13，： | 1 |
| 15 | An experimental study of social tagging behavior and image content 显示文摘 | Golbeck J Koepfler J Emmerling B | 2011 | Journal of the American Society for Information Science and Technology2011，62，9： | 1 |
| 16 | Drug therapy of sleep apnea syndromes: results of shortterm treatment with theophylline 显示文摘 | DiMartino E Saadi R Emmerling O | 1999 | Laryngorhinootologie1999，78，3： | 1 |
| 17 | Inactivation of the FTO gene protects from obesity 显示文摘 | FISCHER J KOCH L EMMERLING C | 2009 | Nature2009，458，7240： | 1 |
| 18 | Impact of application of organic waste materials on microbial and enzyme activities of mine soils in the Lusatian coal mining region显示文摘 | Emmerling C Liebner C Haubold-rosar M | 2000 | Plant & Soil2000，22，： | 1 |
| 19 | Aerogels recent progress in production techniques and novel applications显示文摘 | Fricke J Emmerling A | 1998 | Journal of Sol Gel Science and Technology1998，，： | 1 |
| 20 | Methods for evaluating human impact on soil microorganisms based on their activity, biomass, and diversity in agricultural soils 显示文摘 | Joergensen R G Emmerling C | 2006 | Journal of Plant Nutrition and Soil Science2006，169，3： | 1 |
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