Resource Type

Journal Article 8

Year

2022 1

2021 1

2020 1

2015 1

2014 1

2008 2

2004 1

open ︾

Keywords

in situ IR spectroscopy 1

Aerosol ammonium 1

Ammonia gas-to-particle conversion 1

Atmospheric gaseous ammonia 1

CO2 electrolysis 1

Isotope fingerprinting 1

Isotope-based source apportionment 1

Isotopically labeled standard (ILSs) 1

LC-MS/MS 1

Pharmaceuticals and personal care products (PPCPs) 1

Solid-phase extraction (SPE) 1

Stable isotope probing (SIP) 1

Water 1

acetate 1

basic theory research 1

bioreactor 1

bioremediation 1

by-pass seepage 1

community diversity 1

environment isotope 1

open ︾

Search scope:

排序： Display mode:

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1414-6

Abstract:

• Challenges in sampling of NH3 sources for d15N analysis are highlighted.

Keywords： Aerosol ammonium     Atmospheric gaseous ammonia     Isotope fingerprinting     Isotope-based source apportionment    

HTML PDF Collect

biostimulated by ethanol during uranium (VI) bioremediation in contaminated sediment as shown by stable isotope

Mary Beth LEIGH,Wei-Min WU,Erick CARDENAS,Ondrej UHLIK,Sue CARROLL,Terry GENTRY,Terence L. MARSH,Jizhong ZHOU,Philip JARDINE,Craig S. CRIDDLE,James M. TIEDJE

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 453-464 doi: 10.1007/s11783-014-0721-6

Abstract: Stable isotope probing (SIP) was used to identify microbes stimulated by ethanol addition in microcosms

Keywords： Stable isotope probing (SIP)     ethanol     acetate     uranium reduction     sediment     bioremediation    

HTML PDF Collect

Determination of 27 pharmaceuticals and personal care products (PPCPs) in water: The benefit of isotope

Xueqi Fan, Jie Gao, Wenchao Li, Jun Huang, Gang Yu

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1187-3

Abstract: • Isotope dilution method was developed for the determination of 27 PPCPs in water. • The established27 PPCPs in various water samples were extracted by solid phase extraction (SPE), and determined by isotopeThe isotope dilution method seems to be of benefit when the extract has to be stored for long time before

Keywords： Pharmaceuticals and personal care products (PPCPs)     Isotopically labeled standard (ILSs)     Water     Solid-phase extraction (SPE)     LC-MS/MS    

HTML PDF Collect

Environment Isotope Method to Investigate the Bypass Abutment Seepage Flow in Xin'anjiang Right Dam

Chen Jiansheng,Liu Jiangang,Dong Haizhou,Chen Liang

Strategic Study of CAE 2004, Volume 6, Issue 1,   Pages 57-63

Abstract:

Environmental isotope 2H, 18O and 3H, temperature and electric conductivityEnvironmental isotope data on the right dam indicate the existence of bypass seepage flow in rock.

Keywords： environment isotope     by-pass seepage     precipitation     reservoir    

HTML PDF Collect

Microbial community structure in different wastewater treatment processes characterized by single-strand conformation polymorphism (SSCP) technique

ZHAO Yangguo, WANG Aijie, REN Nanqi, ZHAO Yan

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 116-121 doi: 10.1007/s11783-008-0018-8

Abstract: distribution in five wastewater treatment pro cesses were studied by a culture-independent genetic fingerprinting

Keywords： technique single-strand     proportion     bioreactor     community diversity     fingerprinting technique    

HTML PDF Collect

Considerations on Innovation in the Development of Nuclear Agricultural Sciences

Wang Zhidong,Gao Meixu

Strategic Study of CAE 2008, Volume 10, Issue 1,   Pages 86-90

Abstract:

The development status and existing problems in the field of nuclear agricultural sciences (NAS) are reviewed .Including the application of nuclear technology in mutation breeding by irradiation, isotopic technique application, food irradiation and sterile insect technique, etc. China has made great achievements in the research and application of nuclear technique in agriculture from 1950s to 1990s. Due to lack of enough financial support to the basic research and reformation of science & research system in China, the development of NAS now meets its tough time. Through analyzing the difference and reasons of NAS development between China and the USA, it is recognized that the innovation in research and scientific system is important for promoting the development speed and research level of NAS.

Keywords： nuclear agricultural sciences     mutation breeding     isotope application     food irradiation     sterile insect technique    

HTML PDF Collect

Spin polarization strategy to deploy proton resource over atomic-level metal sites for highly selective CO electrolysis

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1772-1781 doi: 10.1007/s11705-022-2197-4

Abstract: Unlocking of the extremely inert C=O bond during electrochemical CO2 reduction demands subtle regulation on a key “resource”, protons, necessary for intermediate conversion but also readily trapped in water splitting, which is still challenging for developing efficient single-atom catalysts limited by their structural simplicity usually incompetent to handle this task. Incorporation of extra functional units should be viable. Herein, a proton deployment strategy is demonstrated via “atomic and nanostructured iron (A/N-Fe) pairs”, comprising atomically dispersed iron active centers spin-polarized by nanostructured iron carbide ferromagnets, to boost the critical protonation steps. The as-designed catalyst displays a broad window (300 mV) for CO selectivity > 90% (98% maximum), even outperforming numerous cutting-edge M–N–C systems. The well-placed control of proton dynamics by A/N-Fe can promote *COOH/*CO formation and simultaneously suppress H2 evolution, benefiting from the magnetic-proximity-induced exchange splitting (spin polarization) that properly adjusts energy levels of the Fe sites’ d-shells, and further those of the adsorbed intermediates’ antibonding molecular orbitals.

Keywords： single-atom catalysts     spin polarization     proton dynamics     in situ IR spectroscopy     kinetic isotope    

HTML PDF Collect

Nitrogen pollution and source identification of urban ecosystem surface water in Beijing

Yufen REN, Zhiwei XU, Xinyu ZHANG, Xiaoke WANG, Xiaomin SUN, D. J. BALLANTINE, Shengzhong WANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 106-116 doi: 10.1007/s11783-012-0474-z

Abstract: Nitrogen contamination of surface water is a worldwide environmental problem with intensive agriculture and high population densities. We assessed the spatial and seasonal variation in concentrations of total nitrogen and different nitrogen species present in surface-water in Beijing, China. Also, chemical ( ) and isotopic ( ) indicators were used to identify nitrate sources. The results showed that, during 2009 and 2010, nitrate nitrogen concentrations ranged from 0.7 to 7.6 mg·L , ammonium nitrogen from 0.1 to 3.4 mg·L , and total nitrogen from 2.4 to 17.0 mg·L . Inorganic nitrogen accounted for between 60 and 100% of total nitrogen at the ten monitoring sites. Nitrate nitrogen, ammonium nitrogen, and total nitrogen concentrations at the 2 downstream monitoring sites in south-eastern Beijing were significantly higher than those at the other eight upstream monitoring sites ( <0.01). Examination of seasonal variation showed that there was a significant inverse relationship between nitrate nitrogen concentrations and precipitation, and that nitrate nitrogen concentrations peaked in the dry seasons. The information given by the values and nitrate nitrogen concentrations, combined with the ratio distribution, showed that domestic sewage was the major source of nitrate in Beijing. Methods to control and reduce sewage pollution are urgently needed to help manage surface water quality in Beijing.

Keywords： nitrogen concentration     spatial and seasonal variation     stable nitrogen isotope     urban ecosystem     source    

HTML PDF Collect

Title Author Date Type Operation

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Journal Article

biostimulated by ethanol during uranium (VI) bioremediation in contaminated sediment as shown by stable isotope

Mary Beth LEIGH,Wei-Min WU,Erick CARDENAS,Ondrej UHLIK,Sue CARROLL,Terry GENTRY,Terence L. MARSH,Jizhong ZHOU,Philip JARDINE,Craig S. CRIDDLE,James M. TIEDJE

Journal Article

Determination of 27 pharmaceuticals and personal care products (PPCPs) in water: The benefit of isotope

Xueqi Fan, Jie Gao, Wenchao Li, Jun Huang, Gang Yu

Journal Article

Environment Isotope Method to Investigate the Bypass Abutment Seepage Flow in Xin'anjiang Right Dam

Chen Jiansheng,Liu Jiangang,Dong Haizhou,Chen Liang

Journal Article

Microbial community structure in different wastewater treatment processes characterized by single-strand conformation polymorphism (SSCP) technique

ZHAO Yangguo, WANG Aijie, REN Nanqi, ZHAO Yan

Journal Article

Considerations on Innovation in the Development of Nuclear Agricultural Sciences

Wang Zhidong,Gao Meixu

Journal Article

Spin polarization strategy to deploy proton resource over atomic-level metal sites for highly selective CO electrolysis

Journal Article

Nitrogen pollution and source identification of urban ecosystem surface water in Beijing

Yufen REN, Zhiwei XU, Xinyu ZHANG, Xiaoke WANG, Xiaomin SUN, D. J. BALLANTINE, Shengzhong WANG

Journal Article