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| 1 | Concentrations and isotopic characteristics of atmospheric reactive nitrogen around typical sources in Beijing,China显示文摘With rapid economic growth in China,anthropogenic reactive nitrogen(Nr) emissions have more than doubled over the last two or three decades.Atmospheric Nr pollution is an environmental concern in China especially in megacities such as Beijing.In order to identify the impact of emission sources on atmospheric Nr pollution,we measured atmospheric Nr concentrations and their isotopic composition(δ^(15)N) dynamics at three typical sites:landfill,pig farm and road traffic sites in Beijing from April 2010 to March 2011.Passive samplers were used for monitoring ammonia(NH_3) and nitrogen dioxide(NO_2),two major Nr species,while their δ^(15)N values were measured by a diffusion method combined with mass spectrometer approach.The raw water pool of the landfill and fattening house of the pig farm were important NH_3 sources with mean NH_3 concentrations being 2,829 and 2,369 μg/m^3,respectively,while the road traffic site was a minor NH_3 source(10.6 μg/m^3).NH_3 concentrations at sites besides the landfill and roads were high in summer and low in winter due to the annual variation of temperature and the change of emission source intensity.In contrast,the NH_3 concentrations inside the pig farm house were high in winter and low in summer,for the barn windows were open in summer and closed in winter.The mean NO_2 concentrations were 89.8,32.9 and 23.0 μg/m^3 at the road traffic,the landfill and pig farm sites,respectively.Due to vehicle fuel combustion,NO_2 concentration at the road traffic was the highest among the three sources,and the road traffic was a main NO_2 emission source.PM10,p NH4+ and p NO3– concentrations in particulate matter were higher in summer than in winter(except PM10 for the pig farm).The δ^(15)NH_3 values ranged from –19.14‰ to 7.82‰,with an average of –0.05‰ for the landfill site,and the lowest values were observed in June and July.The δ^(15)NH_3 values for the pig farm site ranged from –29.78‰ to –14.05‰ with an average of –24.51‰,and the δ^(15)NH_3 values were more negative in summer than in the other seasons.The δ^(15)NO_2 values were –9.63‰ to 7.04‰ with an average of –3.72‰ for the road traffic site.The δ^(15)NO_2 values were more negative in summer than those in the other seasons.The different δ^(15)N values for the various Nr species in different sources may serve as important indicators for identifying atmospheric Nr sources in megacities.The results may also provide the theoretical basis for research on the atmospheric N deposition and its sources. | LIU Jieyun ZHANG Ying LIU Xuejun TANG Aohan QIU Husen ZHANG Fusuo | 2016 | Journal of Arid Land2016，8，6： | 2 |
| 2 | Effect of branch position and auxin treatment on clonal propagation of Tectona grandis Linn. f.显示文摘 | Azamal Husen Mohinder Pal | 2007 | New Forests2007，，3： | 1 |
| 3 | Screening of soil bacteria for plant growth promotion activi- ties in vitro 显示文摘 | Husen E | 2003 | Indonesian Journal of Agricultural Sciences2003，4，1： | 1 |
| 4 | Recovery of photoinactivated photosystem II in leaves: retardation due to restricted mobility of photosystem II in the thylakoid membrane显示文摘 | Riichi Oguchi Husen Jia James Barber | 2008 | Photosynth Res2008，10，5： | 1 |
| 5 | Gut Microbiota and Its Possible Relationship With Obesity显示文摘 | John K. DiBaise Husen Zhang Michael D. Crowell Rosa Krajmalnik-Brown G. Anton Decker Bruce E. Rittmann | 2008 | Mayo Clinic Proceedings2008，，4： | 1 |
| 6 | The -inverse with applications to satistics显示文摘 | HUSEN F LANGENBERG P GETSON A | 1985 | Linear Algebra Appl1985，70，： | 1 |
| 7 | Calcifying fibrous pseudotumor in association with hyaline vascular type Castleman' s disease 显示文摘 | AZAM M HUSEN Y A PERVES S | 2009 | Indian J Pathol Microbiol2009，52，4： | 1 |
| 8 | New therapies in steroid-sensitive andsteroid-resistant idiopathic nephrotic syndrome显示文摘 | Husen M Kemper MJ | 2011 | Pediatr Ne-phrol2011，26，6： | 1 |
| 9 | A cutinase with polyester synthesis activity 显示文摘 | Husen M Azim A Mang H | 2007 | Macromolecules2007，40，2： | 1 |
| 10 | Imiglucerase treatment in Gauchers disease 显示文摘 | Shah U Nadeem N Husen Y | 2007 | J Ayub Med Coll Abbottaad2007，19，： | 1 |
| 11 | Full-Scale Application of Focused-Pulsed Pre-Treatment for Improving Biosolids Digestion and Conversion to Methane显示文摘 | Rittmann B E Lee H S Zhang Husen | 2008 | Water Science&Technology2008，58，10： | 1 |
| 12 | Local earthquake tomography between rays and waves: fat ray tomography显示文摘 | Stephan Husen Edi Kissling | 2001 | Physics of the Earth and Planetary Interiors2001，，1： | 1 |
| 13 | Consistent phase picking for regional tomography models: application to the greater Alpine region显示文摘 | Diehl T Kissling E Husen S | 2009 | Geophysical Journal International2009，176，2： | 1 |
| 14 | Accuracy of surgeon-performed ultrasound in parathyroid localization显示文摘 | Van Husen R Kim LT | 2004 | World J Surg2004，28，11： | 1 |
| 15 | Research Paradigms in Education显示文摘 | Torsten Husen | 1988 | Interchange1988，19，1： | 1 |
| 16 | Staging of endometrial carcinoma by magnetic resonance imaging: correlation with surgery and histopathology显示文摘 | Mubarak F Akhtar MW Husen YA | 2009 | J Pak Med Assoc2009，59，9： | 1 |
| 17 | Expression and regulation of estrogen-converting enzymes in ectopic human endometrial tissue 显示文摘 | Fechner S Husen B Thole H | 2007 | Fertil Steril2007，88，4： | 1 |
| 18 | Accuracy of surgeon-performed ultrasound in parathyroid localization显示文摘 | Van Husen R Kin LT | 2004 | World J Surg2004，28，： | 1 |
| 19 | Focused-Pulsed sludge pre-treatment increases the bacterial diversity and relative abundance of acetoclastic methanogens in a full-scale anaerobic digester显示文摘 | Husen Zhang James E. Banaszak Prathap Parameswaran Jared Alder Rosa Krajmalnik-Brown Bruce E. Rittmann | 2009 | Water Research2009，，18： | 1 |
| 20 | Value of magnetic resonance myelography in the diagnosis of disc herniation and spinal stenosis 显示文摘 | Pui MH Husen YA | 2000 | Australas Radiol2000，44，3： | 1 |
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