Sami Ullah

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Publications

  1. 2021
  2. E-pub ahead of print

    Chronic atmospheric reactive nitrogen deposition suppresses biological nitrogen fixation in peatlands

    Sami Ullah, 4 Jan 2021, In: Environmental Science and Technology.

    Research output: Contribution to journal › Article › peer-review

  3. 2020
  4. Published

    Concurrent measurement of nitrate and ammonium in water and soil samples using ion‐selective electrodes: Tackling sensitivity and precision issues

    Sami Ullah, 5 Dec 2020, In: Analytical Sciences Advances.

    Research output: Contribution to journal › Article › peer-review

  5. Published

    Alleviation of nitrogen stress in rice (Oryza sativa) by ceria nanoparticles

    Peng Zhang, Zhiling Guo, Sami Ullah & Iseult Lynch, 1 Oct 2020, In: Environmental Science: Nano. 7, 10, p. 2930-2940 11 p.

    Research output: Contribution to journal › Article › peer-review

  6. Published

    The method controls the story - Sampling method impacts on the detection of pore-water nitrogen concentrations in streambeds

    Sophie Comer-Warner, Phillip Blaen, Megan Klaar, Sami Ullah, Nicholas Kettridge, Sandy Milner & 2 others, David Hannah & Stefan Krause, 20 Mar 2020, In: Science of the Total Environment. 709, 19 p., 136075.

    Research output: Contribution to journal › Review article › peer-review

  7. Published

    Seasonal variability of sediment controls of nitrogen cycling in an agricultural stream

    Sophie Comer-Warner, Sami Ullah, Nicholas Kettridge & Stefan Krause, Mar 2020, In: Biogeochemistry. 148, 1, p. 31-48 18 p.

    Research output: Contribution to journal › Article › peer-review

  8. Accepted/In press

    Heavy metal pollution increases CH4 and decreases CO2 emissions due to soil microbial changes in a mangrove wetland: Microcosm experiment and field examination

    Jiaojiao Ma, Sami Ullah, 2020, (Accepted/In press) In: Chemosphere. 128735.

    Research output: Contribution to journal › Article › peer-review

  9. 2019
  10. Published

    Reply to ‘Pseudoreplication and greenhouse-gas emissions from rivers'

    Sophie Comer-Warner, Sami Ullah, Nicholas Kettridge, David Hannah & Stefan Krause, Dec 2019, In: Nature Communications.

    Research output: Contribution to journal › Article › peer-review

  11. Published

    Seasonal variability of sediment controls of carbon cycling in an agricultural stream

    Sophie Comer-Warner, Sami Ullah, Nicholas Kettridge & Stefan Krause, 20 Oct 2019, In: Science of the Total Environment. 688, p. 732-741 10 p.

    Research output: Contribution to journal › Article › peer-review

  12. Published

    Revealing chlorinated ethene transformation hotspots in a nitrate impacted hyporheic zone

    Stefan Krause, Sami Ullah, Nigel Cassidy, 15 Sep 2019, In: Water Research. 161, p. 222-231 10 p.

    Research output: Contribution to journal › Article › peer-review

  13. Published

    Addendum: Thermal sensitivity of CO2 and CH4 emissions varies with streambed sediment properties

    Sophie Comer-Warner, Paul Romeijn, Sami Ullah, Nicholas Kettridge, David Hannah & Stefan Krause, 9 Jul 2019, In: Nature Communications. 10, 1, 1 p., 3093 .

    Research output: Contribution to journal › Article › peer-review

  14. Published

    Biological nitrogen fixation in peatlands: comparison between acetylene reduction assay and 15N2 assimilation methods

    Sami Ullah, 1 Apr 2019, In: Soil Biology and Biochemistry. 131, p. 157-165 9 p.

    Research output: Contribution to journal › Article › peer-review

  15. Published

    Streambed organic matter controls on carbon dioxide and methane emissions from streams

    Sophie Comer-Warner, Sami Ullah, David Hannah & Stefan Krause, 5 Mar 2019, In: Environmental Science and Technology. 53, 5, p. 2364-2374 11 p.

    Research output: Contribution to journal › Article › peer-review

  16. Published

    China’s ineffective plastic solution to haze

    Sami Ullah, 2019, In: Science.

    Research output: Contribution to journal › Article › peer-review

  17. 2018
  18. Published

    Simultaneous detection of ammonium and nitrate in environmental samples using on ion-selective electrode and comparison with portable colorimetric assays

    Sami Ullah, 19 Oct 2018, In: Sensors (Switzerland). 18, 10

    Research output: Contribution to journal › Article › peer-review

  19. Published

    Thermal sensitivity of CO2 and CH4 emissions varies with streambed sediment properties

    Sophie Comer-Warner, Sami Ullah, Nicholas Kettridge, David Hannah & Stefan Krause, 18 Jul 2018, In: Nature Communications. 9, 1, 2803.

    Research output: Contribution to journal › Article › peer-review

  20. Published

    Erratum: author correction: nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots (Nature communications (2018) 9 1 (1135))

    Sami Ullah & 16 others, , 26 Apr 2018, In: Nature Communications. 9, 1, 1 p., 1748 .

    Research output: Contribution to journal › Comment/debate › peer-review

  21. Published

    Nitrogen-rich organic soils under warm well-drained conditions are global nitrous oxide emission hotspots

    Sami Ullah & 16 others, , 19 Mar 2018, In: Nature Communications. 9, 1135.

    Research output: Contribution to journal › Article › peer-review

  22. Published

    Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

    Stefan Krause, Sami Ullah, Nigel Cassidy, 1 Jan 2018, In: Water Research. 128, p. 362-382 21 p.

    Research output: Contribution to journal › Review article › peer-review

  23. 2017
  24. Published

    Soil greenhouse gas fluxes, environmental controls and the partitioning of N2O sources in UK natural and semi-natural land use types.

    Sami Ullah, 25 Sep 2017, In: Journal of Geophysical Research: Biogeosciences.

    Research output: Contribution to journal › Article › peer-review

  25. Published

    Single strip solid contact ion selective electrodes on a pencil-drawn electrode substrate

    Sami Ullah, 2017, In: Analytical Methods. 9, 7, p. 1213-1220 8 p.

    Research output: Contribution to journal › Article › peer-review

  26. 2016
  27. Published

    Application of the 15N gas-flux method for measuring in situ N2 and N2O fluxes due to denitrification in natural and semi-natural terrestrial ecosystems and comparison with the acetylene inhibition technique

    Sami Ullah, 29 Mar 2016, In: Biogeosciences. 13, 6, p. 1821-1835 15 p.

    Research output: Contribution to journal › Article › peer-review

  28. 2015
  29. Published

    Relative magnitude and controls of in situ N2 and N2O fluxes due to denitrification in natural and seminatural terrestrial ecosystems using 15N tracers 

    Sami Ullah, 15 Dec 2015, In: Environmental Science and Technology. 49, 24, p. 14110-14119 10 p.

    Research output: Contribution to journal › Article › peer-review

  30. Published

    Relative magnitude and controls of in situ N2 and N2O fluxes due to denitrification in natural and semi-natural terrestrial ecosystems using 15N tracers

    Sami Ullah, 28 Oct 2015, In: Environmental Science and Technology. 49, 24, p. 14110-14119

    Research output: Contribution to journal › Article › peer-review

  31. Published

    Effect of inundation, oxygen and temperature on carbon mineralization in boreal ecosystems

    Sami Ullah, 1 Apr 2015, In: Science of the Total Environment. 511, p. 381-392 12 p.

    Research output: Contribution to journal › Article › peer-review

  32. 2014
  33. Published

    Carbon and greenhouse gas balances in an age sequence of temperate pine plantations

    Sami Ullah, 7 Oct 2014, In: Biogeosciences. 11, 19, p. 5399-5410 12 p.

    Research output: Contribution to journal › Article › peer-review

  34. Published

    Control of river stage on the reactive chemistry of the hyporheic zone

    Sami Ullah, 15 Aug 2014, In: Hydrological Processes. 28, 17, p. 4766-4779 14 p.

    Research output: Contribution to journal › Article › peer-review

  35. Published

    Fine-scale in situ measurement of riverbed nitrate production and consumption in an armored permeable riverbed

    Sami Ullah, 15 Apr 2014, In: Environmental Science and Technology. 48, 8, p. 4425-4434 10 p.

    Research output: Contribution to journal › Article › peer-review

  36. Published

    Dissolved organic carbon and total dissolved nitrogen production by boreal soils and litter: The role of flooding, oxygen concentration, and temperature

    Sami Ullah, Apr 2014, In: Biogeochemistry. 118, 1-3, p. 35-48 14 p.

    Research output: Contribution to journal › Article › peer-review