@article{UBHD-67797916,
  author={Althoff, Frederik and Benzing, Kathrin Julia and Comba, Peter and Greiner, Steffen and Keppler, Frank},
  title={Abiotic methanogenesis from organosulphur compounds under ambient conditions},
  year={2014},
  language={eng},
  issn={2041-1723},
  volume={5(2014) Artikel-Nr. 4205},
  note={Gesehen am 01.04.2015},
  journal={Nature Communications},
  doi={10.1038/ncomms5205},
}
@article{UBHD-67837639,
  author={Althoff, Frederik and Jugold, Alke and Keppler, Frank},
  title={Methane formation by oxidation of ascorbic acid using iron minerals and hydrogen peroxide},
  year={2010},
  pages={286-292},
  language={eng},
  issn={1879-1298},
  volume={80},
  note={Gesehen am 30.06.2015},
  journal={Chemosphere},
  doi={10.1016/j.chemosphere.2010.04.004},
}
@article{UBHD-67797917,
  author={Anh{\"a}user, Tobias and Greule, Markus and Keppler, Frank},
  title={D/H ratios of methoxyl groups of the sedimentary organic matter of Lake Holzmaar (Eifel, Germany)},
  subtitle={a potential palaeoclimate/-hydrology proxy},
  year={2014},
  pages={39-52},
  language={eng},
  issn={0016-7037},
  volume={142},
  note={Gesehen am 01.04.2015},
  journal={Geochimica et cosmochimica acta},
  doi={10.1016/j.gca.2014.08.001},
}
@article{UBHD-68425206,
  author={Anh{\"a}user, Tobias and Greule, Markus and Keppler, Frank},
  title={Earliest Eocene cold period and polar amplification},
  subtitle={insights from [delta]2H values of lignin methoxyl groups of mummified wood},
  year={2018},
  pages={326-336},
  language={eng},
  issn={0031-0182},
  volume={505},
  note={Im Zusatz zum Titel ist "delta" als griechischer Buchstabe dargestellt ; Gesehen am 29.09.2019},
  journal={Palaeogeography, palaeoclimatology, palaeoecology},
  doi={10.1016/j.palaeo.2018.05.049},
}
@article{UBHD-68108047,
  author={Anh{\"a}user, Tobias and Greule, Markus and Polag, Daniela and Bowen, Gabriel J. and Keppler, Frank},
  title={Mean annual temperatures of mid-latitude regions derived from [delta]2H values of wood lignin methoxyl groups and its implications for paleoclimate studies},
  year={2017},
  pages={1276-1282},
  language={eng},
  issn={1879-1026},
  volume={574},
  note={Im Titel ist [delta] als griechischer Buchtstabe dargestellt und "2" hochgestellt ; Gesehen am 07.04.2017},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2016.07.189},
}
@article{UBHD-67848006,
  author={Anh{\"a}user, Tobias and Greule, Markus and Keppler, Frank},
  title={Stable hydrogen and carbon isotope ratios of methoxyl groups during plant litter degradation},
  year={2015},
  pages={143-154},
  language={eng},
  issn={1477-2639},
  volume={51},
  number={1},
  note={Gesehen am 20.07.2015},
  journal={Isotopes in environmental and health studies},
  doi={10.1080/10256016.2015.1013540},
}
@article{UBHD-68108046,
  author={Anh{\"a}user, Tobias and Greule, Markus and Keppler, Frank},
  title={Stable hydrogen isotope values of lignin methoxyl groups of four tree species across Germany and their implication for temperature reconstruction},
  year={2017},
  pages={263-271},
  language={eng},
  issn={1879-1026},
  volume={579},
  note={Gesehen am 07.04.2017},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2016.11.109},
}
@article{UBHD-68576861,
  author={Anh{\"a}user, Tobias and Sehls, Birgit and Thomas, Werner and Hartl, Claudia and Greule, Markus and Scholz, Denis and Esper, Jan and Keppler, Frank},
  title={Tree-ring [delte]2H values from lignin methoxyl groups indicate sensitivity to European-scale temperature changes},
  year={2020},
  language={eng},
  issn={0031-0182},
  volume={546(2020) Artikel-Nummer 109665},
  number={14 Seiten},
  note={Im Titel ist die Zahl "2" hochgestellt ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Gesehen am 14.05.2020},
  journal={Palaeogeography, palaeoclimatology, palaeoecology},
  doi={10.1016/j.palaeo.2020.109665},
}
@article{UBHD-68414467,
  author={Bahlmann, Enno and Keppler, Frank and Greule, Markus and Sch{\"o}ler, Heinz Friedrich},
  title={Evidence for a major missing source in the global chloromethane budget from stable carbon isotopes},
  year={2019},
  pages={1703-1719},
  language={eng},
  issn={1680-7324},
  volume={19},
  number={3},
  note={Gesehen am 31.07.2019},
  journal={Atmospheric chemistry and physics},
  doi={10.5194/acp-19-1703-2019},
}
@article{UBHD-68221845,
  author={Benzing, Kathrin Julia and Comba, Peter and Martin, Bodo and Pokrandt, Bianca and Keppler, Frank},
  title={Nonheme iron-oxo-catalyzed methane formation from methyl thioethers},
  subtitle={scope, mechanism, and relevance for natural systems},
  year={2017},
  pages={10465-10472},
  language={eng},
  issn={1521-3765},
  volume={23},
  number={43},
  note={Gesehen am 19.02.2018},
  journal={Chemistry - a European journal},
  doi={10.1002/chem.201701986},
}
@article{UBHD-67842966,
  author={Biester, Harald and Keppler, Frank},
  title={Halogen retention, organohalogens and the role of organic matter decomposition on halogen enrichment in two Chilean peat bogs},
  year={2004},
  pages={1984-1991},
  language={eng},
  issn={1520-5851},
  volume={38},
  number={7},
  note={Gesehen am 08.07.2015},
  journal={Environmental science & technology},
  doi={10.1021/es0348492},
}
@article{UBHD-68491614,
  author={Bižić, Mina and Klintzsch, Thomas and Keppler, Frank},
  title={Aquatic and terrestrial cyanobacteria produce methane},
  year={2020},
  pages={10 S.},
  language={eng},
  issn={2375-2548},
  volume={6(2020},
  note={Gesehen am 20.02.2020},
  journal={Science advances},
  doi={10.1126/sciadv.aax5343},
}
@article{UBHD-68470873,
  author={Boros, Mihály and Keppler, Frank},
  title={Methane production and bioactivity},
  subtitle={a link to oxido-reductive stress},
  year={2019},
  pages={8 S.},
  language={eng},
  issn={1664-042X},
  volume={10(2019) Artikel-Nummer 1244},
  number={8 Seiten},
  note={Gesehen am 03.01.2020},
  journal={Frontiers in physiology},
  doi={10.3389/fphys.2019.01244},
}
@article{UBHD-68423129,
  author={Bringel, Françoise and Besaury, Ludovic and Keppler, Frank},
  title={Methylotrophs and methylotroph populations for chloromethane degradation},
  year={2019},
  pages={149-172},
  language={eng},
  issn={1467-3045},
  volume={33},
  note={Gesehen am 22.08.2019},
  journal={Current issues in molecular biology},
  doi={10.21775/cimb.033.149},
}
@article{UBHD-68472437,
  author={Bubenzer, Olaf and Gebhardt, Hans and Keppler, Frank},
  title={Der Mensch als geologische Kraft},
  subtitle={Das Zeitalter des Anthropoz{\"a}ns},
  year={2019},
  pages={24-33},
  language={ger and eng},
  issn={0035-998X},
  volume={15},
  note={Gesehen am 09.01.2020},
  journal={Ruperto Carola},
  editor={Pfeiffer, Thomas},
  doi={10.17885/heiup.ruca.2019.15.24092},
  url={http://doi.org/10.17885/heiup.ruca.2019.15.24092},
  library={UB},
}
@article{UBHD-68394701,
  author={Comba, Peter and Faltermeier, Dieter and Keppler, Frank and Sch{\"o}ler, Heinz Friedrich and Schroll, Moritz},
  title={Iron catalyzed demethylation of acetic acid},
  year={2018},
  pages={1704-1714},
  language={eng},
  issn={1029-0389},
  volume={71},
  number={11/3},
  note={Gesehen am 03.06.2019},
  journal={Journal of coordination chemistry},
  doi={10.1080/00958972.2018.1490414},
}
@article{UBHD-69233798,
  author={Cox, Terry and Laceby, J. Patrick and Greule, Markus and Keppler, Frank and Alewell, Christine},
  title={Using stable carbon isotopes of lignin-derived methoxy to improve historical apportionments of particulate organic matter and sediment sources incorporating multiple Suess corrections},
  year={2024},
  pages={2159-2179},
  language={eng},
  issn={1614-7480},
  volume={24},
  number={5},
  note={Gesehen am 15.07.2024},
  journal={Journal of soils and sediments},
  doi={10.1007/s11368-024-03765-2},
}
@article{UBHD-69322788,
  author={Cox, Terry and Wieland, Anna and Greule, Markus and Keppler, Frank and Einbock, Annika and Alewell, Christine},
  title={Isotopic analysis (δ13C and δ2H) of lignin methoxy groups in forest soils to identify and quantify lignin sources},
  year={2024},
  pages={1-10},
  language={eng},
  issn={1879-1026},
  volume={949(2024) vom: Nov.},
  number={Artikel-ID 175025},
  note={Im Titel sind die Zahlen 13 und 2 hochgestellt ; Online verf{\"u}gbar: 24. Juli 2024, Artikelversion:  29. Juli 2024 ; Gesehen am 27.03.2025},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2024.175025},
}
@article{UBHD-67787984,
  author={Derendorp, Leonie and Keppler, Frank},
  title={Methyl chloride and C2-C5 hydrocarbon emissions from dry leaf litter and their dependence on temperature},
  year={2011},
  pages={3112-3119},
  language={eng},
  issn={1878-2442 and 1873-2844},
  volume={45},
  number={18},
  note={Gesehen am 12.03.2015},
  journal={Atmospheric environment},
  doi={10.1016/j.atmosenv.2011.03.016},
}
@article{UBHD-67793918,
  author={Derendorp, Leonie and Keppler, Frank},
  title={Methyl chloride emissions from halophyte leaf litter},
  subtitle={dependence on temperature and chloride content},
  year={2012},
  pages={483-489},
  language={eng},
  issn={1879-1298},
  volume={87},
  number={5},
  note={Gesehen am 24.03.2015},
  journal={Chemosphere},
  doi={10.1016/j.chemosphere.2011.12.035},
}
@article{UBHD-67841753,
  author={Draxler, Susanne and Keppler, Frank},
  title={Ans{\"a}tze zur regionalen Quantifizierung von Methan aus Pflanzen},
  year={2008},
  pages={75-79},
  language={ger},
  issn={1865-5084},
  volume={20},
  number={1},
  note={Gesehen am 06.07.2015},
  journal={Umweltwissenschaften und Schadstoff-Forschung},
  doi={10.1065/uwsf2007.08.20},
}
@article{UBHD-68982488,
  author={Einzmann, Teresa and Schroll, Moritz and Kleint, Jan F. and Greule, Markus and Keppler, Frank},
  title={Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake},
  year={2022},
  pages={1-22},
  language={eng},
  issn={2296-665X},
  volume={10},
  number={Artikel-ID 865862},
  note={Gesehen am 07.11.2022},
  journal={Frontiers in Environmental Science},
  doi={10.3389/fenvs.2022.865862},
  url={https://www.frontiersin.org/articles/10.3389/fenvs.2022.865862},
  library={UB},
}
@book{UBHD-68982480,
  author={Einzmann, Teresa and Schroll, Moritz and Kleint, Jan F. and Greule, Markus and Keppler, Frank},
  title={Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (1 File)},
  language={ger},
  note={Gesehen am 07.11.2022},
  doi={10.11588/data/KLFDVF},
  url={https://doi.org/10.11588/data/KLFDVF},
  library={UB},
}
@article{UBHD-69161592,
  author={Ernst, Leonard and Barayeu, Uladzimir and H{\"a}deler, Jonas and Dick, Tobias P. and Klatt, Judith M. and Keppler, Frank and Rebelein, Johannes G.},
  title={Methane formation driven by light and heat prior to the origin of life and beyond},
  year={2023},
  pages={1-10},
  language={eng},
  issn={2041-1723},
  volume={14},
  number={Artikel-ID 4364},
  note={Gesehen am 16.01.2024},
  journal={Nature Communications},
  doi={10.1038/s41467-023-39917-0},
}
@article{UBHD-68893699,
  author={Ernst, Leonard and Steinfeld, Benedikt and Barayeu, Uladzimir and Klintzsch, Thomas and Kurth, Markus and Grimm, Dirk and Dick, Tobias P. and Rebelein, Johannes G. and Bischofs-Pfeifer, Ilka and Keppler, Frank},
  title={Methane formation driven by reactive oxygen species across all living organisms},
  year={2022},
  pages={482-487},
  language={eng},
  issn={1476-4687},
  volume={603},
  number={7901},
  note={Das PDF enth{\"a}lt einen Anhang von 18 Seiten ; Gesehen am 10.03.2022},
  journal={Nature},
  doi={10.1038/s41586-022-04511-9},
}
@article{UBHD-68427119,
  author={Esper, Jan and Holzk{\"a}mper, Steffen and Keppler, Frank},
  title={Site-specific climatic signals in stable isotope records from Swedish pine forests},
  year={2018},
  pages={855-869},
  language={eng},
  issn={1432-2285},
  volume={32},
  number={3},
  note={Gesehen am 05.09.2019},
  journal={Trees},
  doi={10.1007/s00468-018-1678-z},
}
@article{UBHD-67845336,
  author={Fahimi, Isabelle Jasmine and Keppler, Frank and Sch{\"o}ler, Heinz Friedrich},
  title={Formation of chloroacetic acids from soil, humic acid and phenolic moieties},
  year={2003},
  pages={513-520},
  language={eng},
  issn={1879-1298},
  volume={52},
  number={2},
  note={Gesehen am 14.07.2015},
  journal={Chemosphere},
  doi={10.1016/S0045-6535(03)00212-1},
}
@article{UBHD-68222311,
  author={Geißler, Katrin and Greule, Markus and Keppler, Frank},
  title={Vanilla authenticity control by DNA barcoding and isotope data aggregation},
  year={2017},
  pages={228-237},
  language={eng},
  issn={1099-1026},
  volume={32},
  number={4},
  note={Gesehen am 20.02.2018},
  journal={Flavour and fragrance journal},
  doi={10.1002/ffj.3379},
}
@article{UBHD-67796495,
  author={Gori, Yuri and Greule, Markus and Keppler, Frank},
  title={Carbon, hydrogen and oxygen stable isotope ratios of whole wood, cellulose and lignin methoxyl groups of Picea abies as climate proxies},
  year={2013},
  pages={265-275},
  language={eng},
  issn={1097-0231},
  volume={27},
  number={1},
  note={Gesehen am 30.03.2015},
  journal={Rapid communications in mass spectrometry},
  doi={10.1002/rcm.6446},
}
@article{UBHD-67848666,
  author={Greule, Markus and Keppler, Frank},
  title={Comment on authenticity and traceability of vanilla flavors by analysis of stable isotopes of carbon and hydrogen},
  year={2015},
  pages={5305-5306},
  language={eng},
  issn={1520-5118},
  volume={63},
  number={21},
  note={Gesehen am 21.07.2015},
  journal={Journal of agricultural and food chemistry},
  doi={10.1021/jf506172q},
}
@article{UBHD-69192064,
  author={Greule, Markus and Le, Phuong Mai and Meija, Juris and Mester, Zoltán and Keppler, Frank},
  title={Comparison of carbon isotope ratio measurement of the vanillin methoxy group by gc-irms and 13c-qnmr},
  year={2024},
  pages={100-105},
  language={eng},
  issn={1879-1123},
  volume={35},
  number={3},
  note={Im Titel ist 13 hochgestellt ; Published online 28 November 2023, published in issue 3 January 2024 ; Gesehen am 14.03.2024},
  journal={Journal of the American Society for Mass Spectrometry},
  doi={10.1021/jasms.3c00327},
}
@article{UBHD-67837020,
  author={Greule, Markus and Keppler, Frank},
  title={Improved rapid authentication of vanillin using [delta]13C and [delta]2H values},
  year={2010},
  pages={933-941},
  language={eng},
  issn={1438-2385},
  volume={231},
  number={6},
  note={Im Titel sind die Zahlen "13" und "2" hochgestellt ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Gesehen am 29.06.2015},
  journal={European food research and technology},
  doi={10.1007/s00217-010-1346-z},
}
@article{UBHD-68783263,
  author={Greule, Markus and Wieland, Anna and Keppler, Frank},
  title={Measurements and applications of δ2H values of wood lignin methoxy groups for paleoclimatic studies},
  year={2021},
  pages={1-9},
  language={eng},
  issn={0277-3791},
  volume={268(2021) vom: Aug.},
  number={Artikel-ID 107107},
  note={Im Titel ist delta als griechischer Buchstabe dargestellt ; Gesehen am 24.09.2021},
  journal={Quaternary science reviews},
  doi={10.1016/j.quascirev.2021.107107},
}
@article{UBHD-68359307,
  author={Greule, Markus and Keppler, Frank},
  title={Methyl sulfates as methoxy isotopic reference materials for [delta]13C and [delta]2H measurements},
  year={2019},
  pages={343-350},
  language={eng},
  issn={1097-0231},
  volume={33},
  number={4},
  note={First published: 19 November 2018 ; Im Titel sind die Zahlen"13" und "2" hochgestellt ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Gesehen am 15.02.2019},
  journal={Rapid communications in mass spectrometry},
  doi={10.1002/rcm.8355},
}
@article{UBHD-67840359,
  author={Greule, Markus and Keppler, Frank},
  title={A rapid and precise method for determination of D/H ratios of plant methoxyl groups},
  year={2008},
  pages={3983-3988},
  language={eng},
  issn={1097-0231},
  volume={22},
  number={24},
  note={Gesehen am 02.07.2015},
  journal={Rapid communications in mass spectrometry},
  doi={10.1002/rcm.3817},
}
@article{UBHD-67838257,
  author={Greule, Markus and Keppler, Frank},
  title={A simple rapid method to precisely determine 13C/12C ratios of plant methoxyl groups},
  year={2009},
  pages={1710-1714},
  language={eng},
  issn={1097-0231},
  volume={23},
  number={11},
  note={Im Titel sind die Zahlen "13" und "12" hochgestellt ; Gesehen am 01.07.2015},
  journal={Rapid communications in mass spectrometry},
  doi={10.1002/rcm.4057},
}
@article{UBHD-67794586,
  author={Greule, Markus and Huber, Stefan and Keppler, Frank},
  title={Stable hydrogen-isotope analysis of methyl chloride emitted from heated halophytic plants},
  year={2012},
  pages={584-592},
  language={eng},
  issn={1878-2442 and 1873-2844},
  volume={62},
  note={Gesehen am 25.03.2015},
  journal={Atmospheric environment},
}
@article{UBHD-67793917,
  author={Greule, Markus and Keppler, Frank},
  title={Stable isotope determination of ester and ether methyl moieties in plant methoxyl groups},
  year={2011},
  pages={470-482},
  language={eng},
  issn={1477-2639},
  volume={47},
  number={4},
  note={Gesehen am 24.03.2015},
  journal={Isotopes in environmental and health studies},
  doi={10.1080/10256016.2011.616270},
}
@article{UBHD-67802004,
  author={Greule, Markus and Keppler, Frank},
  title={A stable isotope approach to assessing water loss in fruits and vegetables during storage},
  year={2015},
  pages={1974-1981},
  language={eng},
  issn={1520-5118},
  volume={63},
  number={7},
  note={Gesehen am 13.04.2015},
  journal={Journal of agricultural and food chemistry},
  doi={10.1021/jf505192p},
}
@article{UBHD-68559257,
  author={Greule, Markus and Moossen, Heiko and Lloyd, Max K. and Geilmann, Heike and Brand, Willi A. and Eiler, John M. and Qi, Haiping and Keppler, Frank},
  title={Three wood isotopic reference materials for [delta]2H and [delta]13C measurements of plant methoxy groups},
  year={2020},
  pages={1-11},
  language={eng},
  issn={1872-6836},
  volume={533(2020) Artikel-Nummer 119428},
  note={Available online 25 November 2019 ; Im Titel sind die Zahlen "2" und "13" im Titel hochgestellt ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Gesehen am 30.03.2020},
  journal={Chemical geology},
  doi={10.1016/j.chemgeo.2019.119428},
}
@article{UBHD-69164347,
  author={H{\"a}deler, Jonas and Velmurugan, Gunasekaran and Lauer, Rebekka and Radhamani, Rejith and Keppler, Frank and Comba, Peter},
  title={Natural abiotic iron-oxido-mediated formation of C1 and C2 compounds from environmentally important methyl-substituted substrates},
  year={2023},
  pages={24590-24602},
  language={eng},
  issn={1520-5126},
  volume={145},
  number={45 vom: Nov.},
  note={Im Titel ist die Ziffer 1 bei C1 und die Ziffer 2 bei C2 jeweils tiefgestellt ; Gesehen am 23.01.2024},
  journal={Journal of the American Chemical Society},
  doi={10.1021/jacs.3c06709},
}
@article{UBHD-67845324,
  author={Hamilton, John T. G. and Keppler, Frank},
  title={Chloride methylation by plant pectin},
  subtitle={an efficient environmentally eignificant process},
  year={2003},
  pages={206-209},
  language={eng},
  issn={1095-9203},
  volume={301},
  note={Gesehen am 14.07.2015},
  journal={Science},
  doi={10.1126/science.1085036},
}
@article{UBHD-69098861,
  author={Hartmann, Simon Christoph and Keppler, Frank and Greule, Markus and Lauer, Rebekka and Horst, Axel},
  title={Triple-element stable isotope analysis of chloromethane emitted by royal fern and degraded by club moss},
  year={2023},
  pages={1-15},
  language={eng},
  issn={2169-8961},
  volume={128},
  note={Online ver{\"o}ffentlicht: 8 Mai 2023 ; Gesehen am 18.07.2023},
  journal={Journal of geophysical research},
  doi={10.1029/2022JG007256},
}
@article{UBHD-68222314,
  author={Hepp, Johannes and Greule, Markus and Keppler, Frank},
  title={Late Quaternary relative humidity changes from Mt. Kilimanjaro, based on a coupled 2H-18O biomarker paleohygrometer approach},
  year={2017},
  pages={116-130},
  language={eng},
  issn={1040-6182},
  volume={438},
  note={Gesehen am 20.02.2018 ; Im Titel sind die Zahlen 2 und 18 hochgestellt},
  journal={Quaternary international},
  doi={10.1016/j.quaint.2017.03.059},
}
@article{UBHD-67797167,
  author={Horst, Axel and Keppler, Frank},
  title={Stable bromine isotopic composition of methyl bromide released from plant matter},
  year={2014},
  pages={153-160},
  language={eng},
  issn={0016-7037},
  volume={125},
  note={Gesehen am 31.03.2015},
  journal={Geochimica et cosmochimica acta},
  doi={10.1016/j.gca.2013.10.016},
}
@article{UBHD-67842374,
  author={Houweling, Sander and Keppler, Frank},
  title={Atmospheric constraints on global emissions of methane from plants},
  year={2006},
  pages={5 S.},
  language={eng},
  issn={1944-8007},
  volume={33},
  number={15},
  note={Gesehen am 07.07.2015},
  journal={Geophysical research letters},
  doi={10.1029/2006GL026162},
}
@article{UBHD-67793919,
  author={Hurkuck, Miriam and Keppler, Frank},
  title={Release of methane from aerobic soil},
  subtitle={An indication of a novel chemical natural process?},
  year={2012},
  pages={684-689},
  language={eng},
  issn={1879-1298},
  volume={86},
  number={6},
  note={Gesehen am 24.03.2015},
  journal={Chemosphere},
  doi={10.1016/j.chemosphere.2011.11.024},
}
@article{UBHD-68425929,
  author={J{\"a}ger, Nicole and R{\"o}hling, Amelie Ninja and Koch, Fabien and Greule, Markus and Keppler, Frank},
  title={Chloromethane formation and degradation in the fern phyllosphere},
  year={2018},
  pages={1278-1287},
  language={eng},
  issn={1879-1026},
  volume={634},
  note={Gesehen am 02.09.2019},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2018.03.316},
}
@article{UBHD-68427110,
  author={J{\"a}ger, Nicole and Greule, Markus and Keppler, Frank},
  title={Chloromethane degradation in soils},
  subtitle={a combined microbial and two-dimensional stable isotope approach},
  year={2018},
  pages={254-262},
  language={eng},
  issn={1537-2537},
  volume={47},
  number={2},
  note={Gesehen am 05.09.2019},
  journal={Journal of environmental quality},
  doi={10.2134/jeq2017.09.0358},
}
@article{UBHD-68752597,
  author={Jakob, Kim and Ho, S. Ling and Meckler, A. Nele and Pross, J{\"o}rg and Fiebig, Jens and Keppler, Frank and Friedrich, Oliver},
  title={Stable biological production in the Eastern Equatorial Pacific Across the Plio-Pleistocene transition (∼3.35-2.0 Ma)},
  year={2021},
  pages={1-16},
  language={eng},
  issn={2572-4525},
  volume={36},
  note={Gesehen am 25.06.2021},
  journal={Paleoceanography and paleoclimatology},
  doi={10.1029/2020PA003965},
  url={https://doi.org/10.1029/2020PA003965},
  library={UB},
}
@article{UBHD-68913232,
  author={Jungmann, Maximilian and Vardag, Sanam Noreen and Kutzner, Florian and Keppler, Frank and Schmidt, Martina and Aeschbach, Nicole and Gerhard, Ulrike and Zipf, Alexander and Lautenbach, Sven and Siegmund, Alexander and Goeschl, Timo and Butz, André},
  title={Zooming-in for climate action},
  subtitle={hyperlocal greenhouse gas data for mitigation action?},
  year={2022},
  pages={1-8},
  language={eng},
  issn={2731-3263},
  volume={1},
  number={Artikel-ID 8},
  note={Gesehen am 02.05.2022},
  journal={Climate action},
  doi={10.1007/s44168-022-00007-4},
  url={https://doi.org/10.1007/s44168-022-00007-4},
  library={UB},
}
@book{UBHD-65104887,
  author={Keppler, Frank},
  title={Abiotische Bildung leichtfl{\"u}chtiger Organohalogenverbindungen im Boden},
  year={2000},
  pages={85 Bl.},
  language={ger},
  school={Heidelberg, Univ., Diss., 2000},
  library={UB [Signatur: 2000 U 337]},
}
@article{UBHD-67842391,
  author={Keppler, Frank},
  title={Carbon isotope anomaly in the major plant C1 pool and its global biogeochemical implications},
  year={2004},
  pages={123-131},
  language={eng},
  issn={1726-4189},
  volume={1},
  number={2},
  note={Gesehen am 07.07.2015},
  journal={Biogeosciences},
  doi={10.5194/bg-1-123-2004},
}
@article{UBHD-68560244,
  author={Keppler, Frank and Barnes, Jaime D. and Horst, Axel and Bahlmann, Enno and Luo, Jing and Nadalig, Thierry and Greule, Markus and Hartmann, Simon Christoph and Vuilleumier, Stéphane},
  title={Chlorine isotope fractionation of the major chloromethane degradation processes in the environment},
  year={2020},
  pages={1634-1645},
  language={eng},
  issn={2328-8930},
  volume={54},
  number={3},
  note={Gesehen am 01.04.2020},
  journal={Environmental science & technology letters},
  doi={10.1021/acs.est.9b06139},
}
@article{UBHD-67704549,
  author={Keppler, Frank and Greule, Markus and Sattler, Tobias and Sch{\"o}ler, Heinz Friedrich},
  title={Chloromethane release from carbonaceous meteorite affords new insight into Mars lander findings},
  year={2014},
  pages={11 S.},
  language={eng},
  issn={2045-2322},
  volume={4(2014) Artikel-Nr. 7010},
  note={Gesehen am 14.11.2014},
  journal={Scientific reports},
  doi={10.1038/srep07010},
}
@article{UBHD-68220618,
  author={Keppler, Frank and Fischer, Jan and Sattler, Tobias and Polag, Daniela and J{\"a}ger, Nicole and Sch{\"o}ler, Heinz Friedrich and Greule, Markus},
  title={Chloromethane emissions in human breath},
  year={2017},
  pages={405-410},
  language={eng},
  issn={1879-1026},
  volume={605/606},
  note={Gesehen am 15.02.2018},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2017.06.202},
}
@article{UBHD-67810331,
  author={Keppler, Frank and Pracht, Jens and Sch{\"o}ler, Heinz Friedrich},
  title={De novo formation of chloroethyne in soil},
  year={2006},
  pages={130-134},
  language={eng},
  issn={1520-5851},
  volume={40},
  number={1},
  note={Gesehen am 28.04.2015},
  journal={Environmental science & technology},
  doi={10.1021/es0513279},
}
@article{UBHD-67846308,
  author={Keppler, Frank and Elsner, Petteri and Fahimi, Isabelle Jasmine and Pracht, Jens and Sch{\"o}ler, Heinz Friedrich},
  title={Formation of volatile iodinated alkanes in soil: results from laboratory studies},
  year={2003},
  pages={477-483},
  language={eng},
  issn={1879-1298},
  volume={52},
  number={2},
  note={Gesehen am 15.07.2015},
  journal={Chemosphere},
  doi={10.1016/S0045-6535(03)00198-X},
}
@book{UBHD-68871465,
  author={Keppler, Frank and Schmitt, Axel Karl and Trieloff, Mario},
  title={Geowissenschaften},
  publisher={Universit{\"a}tsbibliothek Heidelberg},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (22 Seiten)},
  language={ger},
  note={Dieser Text ist die herausgeberisch und redaktionell bearbeitete, aber noch nicht abschließend lektorierte und ungesetzte Vorabver{\"o}ffentlichung eines Kapitels, das im Band Umwelt interdisziplin{\"a}r Grundlagen – Konzepte – Handlungsfelder herausgegeben von Thomas Meier, Frank Keppler, Ute Mager, Ulrich Platt und Friederike Reents bei Heidelberg University Publishing (heiUP; https://heiup.uni-heidelberg.de/) Open Access und in gedruckter Form erscheinen wird ; Aus: Umwelt interdisziplin{\"a}r, Bd. 1. Universit{\"a}tsbibliothek Heidelberg, Heidelberg 2022},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-310770},
  library={UB},
}
@article{UBHD-67847995,
  author={Keppler, Frank and Eiden, Ralf and Niedan, Volker Wolfgang and Pracht, Jens and Sch{\"o}ler, Heinz Friedrich},
  title={Halocarbons produced by natural oxidation processes during degradation of organic matter},
  year={2000},
  pages={298-301},
  language={eng},
  issn={1476-4687},
  volume={403},
  note={Gesehen am 20.07.2015},
  journal={Nature},
  doi={10.1038/35002055},
}
@book{UBHD-67897726,
  author={Keppler, Frank},
  title={Leben wir in einem neuen Zeitalter?},
  publisher={Universit{\"a}tsbibliothek Heidelberg},
  address={Heidelberg},
  year={2015},
  pages={Online-Ressource},
  language={ger},
  note={Videoaufzeichnung (Dauer: 4 Min. 58 Sek.)},
  keywords={Anthropoz{\"a}n / Periodisierung},
  url={http://www.ub.uni-heidelberg.de/archiv/19739},
  library={UB},
}
@article{UBHD-68427095,
  author={Keppler, Frank and Greule, Markus and Sch{\"o}ler, Heinz Friedrich},
  title={Mass spectrometric measurement of hydrogen isotope fractionation for the reactions of chloromethane with OH and Cl},
  year={2018},
  pages={6625-6635},
  language={eng},
  issn={1680-7324},
  volume={18},
  number={9},
  note={Gesehen am 05.09.2019},
  journal={Atmospheric chemistry and physics},
  doi={10.5194/acp-18-6625-2018},
}
@article{UBHD-67837636,
  author={Keppler, Frank and Greule, Markus},
  title={Measurements of 13C/12C methane from anaerobic digesters},
  subtitle={comparison of optical spectrometry with continuous-flow isotope ratio mass spectrometry},
  year={2010},
  pages={5067-5073},
  language={eng},
  issn={1520-5851},
  volume={44},
  number={13},
  note={Im Titel sind die Zahlen "13" und "12" hochgestellt ; Gesehen am 30.06.2015},
  journal={Environmental science & technology},
  doi={10.1021/es100460d},
}
@article{UBHD-67842371,
  author={Keppler, Frank},
  title={Methane emissions from terrestrial plants under aerobic conditions},
  year={2006},
  pages={187-191},
  language={eng},
  issn={1476-4687},
  volume={439},
  number={?},
  note={Gesehen am 07.07.2015},
  journal={Nature},
  doi={10.1038/nature0442},
}
@conference{UBHD-67838242,
  author={Keppler, Frank},
  title={ Methane formation in aerobic environments},
  year={2009},
  pages={459-465},
  language={eng},
  issn={1449-8979},
  note={Gesehen am 01.07.2015},
  doi={10.1071/EN09137},
}
@article{UBHD-67841744,
  author={Keppler, Frank},
  title={Methoxyl groups of plant pectin as a precursor of atmospheric methane},
  subtitle={evidence from deuterium labelling studies},
  year={2008},
  pages={808-814},
  language={eng},
  issn={1469-8137},
  volume={178},
  number={4},
  note={Gesehen am 06.07.2015},
  journal={The new phytologist},
  doi={10.1111/j.1469-8137.2008.02468.x},
}
@article{UBHD-67998662,
  author={Keppler, Frank and Sch{\"o}ler, Heinz Friedrich},
  title={Nat{\"u}rliche Ozonkiller aus dem Boden},
  year={2002},
  pages={20-24},
  language={ger},
  issn={0035-998X},
  number={2},
  note={Gesehen am 22.06.2016},
  journal={Ruperto Carola},
  editor={Pfeiffer, Thomas},
}
@article{UBHD-67847988,
  author={Keppler, Frank and Pracht, Jens and Rheinberger, Stefan and Sch{\"o}ler, Heinz Friedrich},
  title={Natural formation of vinyl chloride in the terrestrial environment},
  year={2002},
  pages={2479-2483},
  language={eng},
  issn={1520-5851},
  volume={36},
  note={Gesehen am 20.07.2015},
  journal={Environmental science & technology},
  doi={10.1021/es015611l},
}
@article{UBHD-67842383,
  author={Keppler, Frank},
  title={New insight into the atmospheric chloromethane budget gained using stable carbon isotope ratios},
  year={2005},
  pages={2403-2411},
  language={eng},
  issn={1680-7324},
  volume={5},
  number={9},
  note={Gesehen am 07.07.2015},
  journal={Atmospheric chemistry and physics},
  doi={10.5194/acp-5-2403-2005},
}
@article{UBHD-67845316,
  author={Keppler, Frank and Biester, Harald and Sch{\"o}ler, Heinz Friedrich and M{\"u}ller, German},
  title={Organoiodine formation during humification in peatlands},
  year={2003},
  pages={219-223},
  language={eng},
  issn={1610-3661},
  volume={1},
  number={4},
  note={Gesehen am 14.07.2015},
  journal={Environmental chemistry letters},
  doi={10.1007/s10311-003-0044-5},
}
@article{UBHD-67845329,
  author={Keppler, Frank and Biester, Harald},
  title={Peatlands},
  subtitle={a major sink of naturally formed organic chlorine},
  year={2003},
  pages={451-453},
  language={eng},
  issn={1879-1298},
  volume={52},
  number={2},
  note={Gesehen am 14.07.2015},
  journal={Chemosphere},
  doi={10.1016/S0045-6535(03)00210-8},
}
@article{UBHD-68643566,
  author={Keppler, Frank and Sch{\"o}ler, Heinz Friedrich},
  title={Report on the Second International Conference on ‘Naturally Produced Organohalogens’},
  year={2002},
  pages={154},
  language={eng},
  issn={1614-7499},
  volume={9},
  number={2},
  note={Gesehen am 06.10.2020},
  journal={Environmental science and pollution research},
  doi={10.1007/BF02987468},
}
@article{UBHD-68575805,
  author={Keppler, Frank and R{\"o}hling, Amelie Ninja and J{\"a}ger, Nicole and Schroll, Moritz and Hartmann, Simon Christoph and Greule, Markus},
  title={Sources and sinks of chloromethane in a salt marsh ecosystem},
  subtitle={constraints from concentration and stable isotope measurements of laboratory incubation experiments},
  year={2020},
  pages={627-641},
  language={eng},
  issn={2050-7895},
  volume={22},
  number={3},
  note={Gesehen am 12.05.2020},
  journal={Environmental science},
  doi={10.1039/C9EM00540D},
}
@article{UBHD-67841754,
  author={Keppler, Frank},
  title={Stable hydrogen isotope ratios of lignin methoxyl groups as a paleoclimate proxy and constraint of the geographical origin of wood},
  year={2007},
  pages={600-609},
  language={eng},
  issn={1469-8137},
  volume={176},
  number={3},
  note={Gesehen am 06.07.2015},
  journal={The new phytologist},
  doi={10.1111/j.1469-8137.2007.02213.x},
}
@article{UBHD-67932873,
  author={Keppler, Frank and Schiller, Amanda and Greule, Markus and Kleint, Jan F. and Polag, Daniela},
  title={Stable isotope and high precision concentration measurements confirm that all humans produce and exhale methane},
  year={2016},
  pages={? S.},
  language={eng},
  issn={1752-7163},
  volume={10(2016},
  number={1) Artikel-Nummer 016003},
  note={Gesehen am 01.02.2016},
  journal={Journal of breath research},
  doi={10.1088/1752-7155/10/1/016003},
}
@incollection{UBHD-68819237,
  author={Keppler, Frank},
  title={A surprise from the deep},
  subtitle={isotope patterns of methoxyl groups reveal the origin and production potential of methane from coal},
  year={2021},
  pages={821-822},
  language={eng},
  note={Gesehen am 15.12.2021},
  booktitle={Science},
  doi={10.1126/science.abm6027},
}
@article{UBHD-67840351,
  author={Keppler, Frank and Hamilton, John T. G.},
  title={Tracing the geographical origin of early potato tubers using stable hydrogen isotope ratios of methoxyl groups},
  year={2008},
  pages={337-347},
  language={eng},
  issn={1477-2639},
  volume={44},
  number={4},
  note={Gesehen am 02.07.2015},
  journal={Isotopes in environmental and health studies},
  doi={10.1080/10256010802507383},
}
@article{UBHD-67793920,
  author={Keppler, Frank},
  title={Ultraviolet-radiation-induced methane emissions from meteorites and the Martian atmosphere},
  year={2012},
  pages={93-96},
  language={eng},
  issn={1476-4687},
  volume={486},
  number={7401},
  note={Gesehen am 24.03.2015},
  journal={Nature},
  doi={10.1038/nature11203},
}
@book{UBHD-69090682,
  author={Kirchhoff, Thomas and Keppler, Frank and Meier, Thomas and Lorenzen, Jacqueline and Granzow, Tanja},
  title={Umweltwissenschaften},
  publisher={Universit{\"a}tsbibliothek Heidelberg},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (48 Seiten)},
  language={ger},
  note={Aus: Umwelt interdisziplin{\"a}r, Bd. 1. Heidelberg, Universit{\"a}tsbibliothek 2022},
  doi={10.11588/heidok.00032129},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-321297},
  library={UB},
}
@article{UBHD-68427091,
  author={Kleint, Jan F. and Schiller, Amanda and Greule, Markus and Keppler, Frank and Isenbeck-Schr{\"o}ter, Margot},
  title={A fast and sensitive method for the continuous in situ determination of dissolved methane and its [delta]13C-isotope ratio in surface waters},
  year={2018},
  pages={273-285},
  language={eng},
  issn={1541-5856},
  volume={16},
  number={5},
  note={Im Titel ist "delta" als griechischer Buchstabe dargestellt ; im Titel ist die Zahl "13" hochgestellt ; Gesehen am 05.09.2019},
  journal={Limnology and oceanography},
  doi={10.1002/lom3.10244},
}
@article{UBHD-68559215,
  author={Kleint, Jan F. and G{\"u}nthel, Marco and Klintzsch, Thomas and Kirillin, Georgiy and Grossart, Hans-Peter and Keppler, Frank and Isenbeck-Schr{\"o}ter, Margot},
  title={High spatiotemporal dynamics of methane production and emission in oxic surface water},
  year={2020},
  pages={1451-1463},
  language={eng},
  issn={1520-5851},
  volume={54},
  number={3},
  note={Gesehen am 30.03.2020},
  journal={Environmental science & technology},
  doi={10.1021/acs.est.9b03182},
}
@article{UBHD-68754273,
  author={Kleint, Jan F. and Wellach, Yannic and Schroll, Moritz and Keppler, Frank and Isenbeck-Schr{\"o}ter, Margot},
  title={The impact of seasonal sulfate-methane transition zones on methane cycling in a sulfate-enriched freshwater environment},
  year={2021},
  pages={2290-2308},
  language={eng},
  issn={1939-5590},
  volume={66},
  number={6},
  note={Gesehen am 30.06.2021},
  journal={Limnology and oceanography},
  doi={10.1002/lno.11754},
}
@book{UBHD-68676871,
  author={Klintzsch, Thomas and Keppler, Frank},
  title={Effects of temperature and light on methane production of widespread marine phytoplankton [dataset]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2020},
  pages={1 Online-Ressource (1 File)},
  language={eng},
  note={Gesehen am 05.01.2021},
  doi={10.11588/data/AGKWSG},
  url={https://doi.org/10.11588/data/AGKWSG},
  library={UB},
}
@article{UBHD-68666331,
  author={Klintzsch, Thomas and Langer, Gerald and Wieland, Anna and Geisinger, Hannah Katharina and Lenhart, Katharina and Nehrke, Gernot and Keppler, Frank},
  title={Effects of temperature and light on methane production of widespread marine phytoplankton},
  year={2020},
  pages={16 S.},
  language={eng},
  issn={2169-8961},
  volume={125(2020},
  note={Gesehen am 27.11.2020},
  journal={Journal of geophysical research},
  doi={10.1029/2020JG005793},
  url={https://doi.org/10.1029/2020JG005793},
  library={UB},
}
@book{UBHD-68445197,
  author={Klintzsch, Thomas and Keppler, Frank},
  title={Methane production by three widespread marine phytoplankton species},
  subtitle={release rates, precursor compounds, and potential relevance for the environment [dataset]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2019},
  pages={1 Online-Ressource (1 File)},
  language={eng},
  note={Gesehen am 24.10.2019},
  doi={10.11588/data/9N1LSR},
  url={https://doi.org/10.11588/data/9N1LSR},
  library={UB},
}
@article{UBHD-68448717,
  author={Klintzsch, Thomas and Langer, Gerald and Nehrke, Gernot and Wieland, Anna and Lenhart, Katharina and Keppler, Frank},
  title={Methane production by three widespread marine phytoplankton species},
  subtitle={release rates, precursor compounds, and potential relevance for the environment},
  year={2019},
  pages={4129-4144},
  language={eng},
  issn={1726-4189},
  volume={16},
  number={20},
  note={Gesehen am 31.10.2019},
  journal={Biogeosciences},
  doi={10.5194/bg-16-4129-2019},
  url={https://doi.org/https://doi.org/10.5194/bg-16-4129-2019},
  library={UB},
}
@book{UBHD-69084412,
  author={Klintzsch, Thomas and Geisinger, Hannah Katharina and Wieland, Anna and Langer, Gerald and Nehrke, Gernot and Bižić, Mina and Greule, Markus and Lenhart, Katharina and Borsch, Christian and Schroll, Moritz and Keppler, Frank},
  title={Stable carbon isotope signature of methane released from phytoplankton [research data]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2023},
  pages={1 Online-Ressource (1 File)},
  language={eng},
  note={Gesehen am 12.06.2023},
  doi={10.11588/data/YYLEKU},
  url={https://doi.org/10.11588/data/YYLEKU},
  library={UB},
}
@article{UBHD-69109451,
  author={Klintzsch, Thomas and Geisinger, Hannah Katharina and Wieland, Anna and Langer, G. and Nehrke, G. and Bizic, M. and Greule, Markus and Lenhart, Katharina and Borsch, C. and Schroll, Moritz and Keppler, Frank},
  title={Stable carbon isotope signature of methane released from phytoplankton},
  year={2023},
  pages={1-12},
  language={eng},
  issn={1944-8007},
  volume={50},
  note={Ver{\"o}ffentlicht: 20. Juni 2023 ; Gesehen am 10.08.2023},
  journal={Geophysical research letters},
  doi={10.1029/2023GL103317},
}
@article{UBHD-68822951,
  author={Kr{\"o}ber, Eileen and Wende, Sonja and Kanukollu, Saranya and Buchen-Tschiskale, Caroline and Besaury, Ludovic and Keppler, Frank and Vuilleumier, Stéphane and Kolb, Steffen and Bringel, Françoise},
  title={13C-chloromethane incubations provide evidence for novel bacterial chloromethane degraders in a living tree fern},
  year={2021},
  pages={4450-4465},
  language={eng},
  issn={1462-2920},
  volume={23},
  number={8},
  note={Im Titel ist die Zahl "13" vor "C" hochgestellt ; Gesehen am 14.12.2021},
  journal={Environmental microbiology},
  doi={10.1111/1462-2920.15638},
}
@article{UBHD-67837019,
  author={Laukenmann, Stephan and Polag, Daniela and Greule, Markus and Keppler, Frank},
  title={Identification of methanogenic pathways in anaerobic digesters using stable carbon isotopes},
  year={2010},
  pages={509-514},
  language={eng},
  issn={1618-2863},
  volume={10},
  number={6},
  note={Gesehen am 29.06.2015},
  journal={Engineering in life sciences},
  doi={10.1002/elsc.201000074},
}
@article{UBHD-67793922,
  author={Lenhart, Katharina and Greule, Markus and Keppler, Frank},
  title={Evidence for methane production by saprotrophic fungi},
  year={2012},
  pages={9 S.},
  language={eng},
  issn={2041-1723},
  volume={3(2012) Article number 1046},
  number={8 Seiten},
  note={Gesehen am 24.03.2015},
  journal={Nature Communications},
  doi={10.1038/ncomms2049},
}
@article{UBHD-68108048,
  author={Lenhart, Katharina and Klintzsch, Thomas and Langer, Gerald and Nehrke, Gernot and Bunge, Michael and Schnell, Sylvia and Keppler, Frank},
  title={Evidence for methane production by the marine algae Emiliania huxleyi},
  year={2016},
  pages={3163-3174},
  language={eng},
  issn={1726-4189},
  volume={13},
  number={10},
  note={Gesehen am 07.04.2017},
  journal={Biogeosciences},
  doi={10.5194/bg-13-3163-2016},
}
@article{UBHD-67849171,
  author={Lenhart, Katharina and Keppler, Frank},
  title={Nitrous oxide and methane emissions from cryptogamic covers},
  year={2015},
  pages={?},
  language={eng},
  issn={1365-2486},
  volume={21},
  number={8},
  note={Gesehen am 22.07.2015},
  journal={Global change biology},
  doi={10.1111/gcb.12995},
}
@article{UBHD-68332961,
  author={Lenhart, Katharina and Greiner, Steffen and Keppler, Frank},
  title={Nitrous oxide effluxes from plants as a potentially important source to the atmosphere},
  year={2019},
  pages={1398-1408},
  language={eng},
  issn={1469-8137},
  volume={221},
  number={3},
  note={First published: 10 October 2018 ; Gesehen am 27.11.2018},
  journal={The new phytologist},
  doi={10.1111/nph.15455},
}
@article{UBHD-67848660,
  author={Lenhart, Katharina and Greule, Markus and Keppler, Frank},
  title={Technical note: Methionine, a precursor of methane in living plants},
  year={2015},
  pages={1907-1914},
  language={eng},
  issn={1726-4189},
  volume={12},
  number={6},
  note={Gesehen am 21.07.2015},
  journal={Biogeosciences},
  doi={10.5194/bg-12-1907-2015},
}
@article{UBHD-68423088,
  author={Liu, Jiangong and Hartmann, Simon Christoph and Keppler, Frank},
  title={Simultaneous abiotic production of greenhouse gases (CO2, CH4, and N2O) in subtropical soils},
  year={2019},
  pages={1977-1987},
  language={eng},
  issn={2169-8961},
  volume={124},
  number={7},
  note={Im Titel sind die Zahlen 2 und 4 tief gestellt ; Gesehen am 22.08.2019},
  journal={Journal of geophysical research},
  doi={10.1029/2019JG005154},
}
@article{UBHD-69144893,
  author={Lu, Qiangqiang and Liu, Xiaohong and Treydte, Kerstin and Greule, Markus and Wieland, Anna and Liu, Jinzhao and Zhao, Liangju and Zhang, Yu and Kang, Huhu and Zhang, Lingnan and Zeng, Xiaomin and Keppler, Frank and Chen, Zhikun and Xing, Xiaoyu},
  title={Altitude-specific differences in tree-ring δ2H records of wood lignin methoxy in the Qinling mountains, central China},
  year={2023},
  pages={1-14},
  language={eng},
  issn={0277-3791},
  volume={300},
  number={Artikel-ID 107895},
  note={Gesehen am 21.11.2023},
  journal={Quaternary science reviews},
  doi={10.1016/j.quascirev.2022.107895},
}
@article{UBHD-69038485,
  author={Lu, Qiangqiang and Liu, Xiaohong and Tan, Liangcheng and Keppler, Frank and Treydte, Kerstin and Wieland, Anna and Zhang, Lingnan and Shi, Xinwei and Zhang, Yu and Wang, Yabo and Zeng, Xiaomin and Liu, Jun and Zhao, Liangju and Xu, Guobao and Xing, Xiaoyu},
  title={Tree-ring δ2H records of lignin methoxy indicate spring temperature changes since 20th century in the Qinling Mountains, China},
  year={2022},
  pages={1-11},
  language={eng},
  issn={1612-0051},
  volume={76},
  number={Artikel-ID 126020},
  note={In der chemischen Formel des Titels erscheint die Ziffer 2 hochgestellt ; Gesehen am 07.02.2023},
  journal={Dendrochronologia},
  doi={10.1016/j.dendro.2022.126020},
}
@article{UBHD-68671796,
  author={Lu, Qiangqiang and Liu, Xiaohong and Anh{\"a}user, Tobias and Keppler, Frank and Wang, Yabo and Zeng, Xiaomin and Zhang, Qiuliang and Zhang, Lingnan and Wang, Keyi and Zhang, Yu},
  title={Tree-ring lignin proxies in Larix gmelinii forest growing in a permafrost area of northeastern China},
  subtitle={temporal variation and potential for climate reconstructions},
  year={2020},
  pages={11 S.},
  language={eng},
  issn={1872-7034},
  volume={118(2020) Artikel-Nummer 106750},
  number={11 Seiten},
  note={Gesehen am 10.12.2020},
  journal={Ecological indicators},
  doi={10.1016/j.ecolind.2020.106750},
}
@article{UBHD-67848669,
  author={May, Tobias and Polag, Daniela and Keppler, Frank},
  title={Design and application of a synthetic DNA standard for real-time PCR analysis of microbial communities in a biogas digester},
  year={2015},
  pages={6721-6729},
  language={eng},
  issn={1432-0614},
  volume={99},
  note={Gesehen am 21.07.2015},
  journal={Applied microbiology and biotechnology},
  doi={10.1007/s00253-015-6721-z},
}
@article{UBHD-68427100,
  author={May, Tobias and Polag, Daniela and Keppler, Frank and Greule, Markus},
  title={Methane oxidation in industrial biogas plants},
  subtitle={insights in a novel methanotrophic environment evidenced by pmoA gene analyses and stable isotope labelling studies},
  year={2018},
  pages={77-84},
  language={eng},
  issn={1873-4863},
  volume={270},
  note={Gesehen am 05.09.2019},
  journal={Journal of biotechnology},
  doi={10.1016/j.jbiotec.2018.01.022},
}
@article{UBHD-67851592,
  author={McRoberts, W. Colin and Keppler, Frank},
  title={Seasonal changes in chlorine and methoxyl content of leaves of deciduous trees and their impact on release of chloromethane and methanol at elevated temperatures},
  year={2015},
  pages={426-437},
  language={eng},
  issn={1449-8979},
  volume={12},
  number={4},
  note={Gesehen am 28.07.2015},
  journal={Environmental chemistry},
  doi={10.1071/EN14208},
}
@book{UBHD-69090129,
  author={Meier, Thomas and Keppler, Frank and Mager, Ute and Platt, Ulrich and Reents, Friederike},
  title={Vorwort},
  publisher={Universit{\"a}tsbibliothek Heidelberg},
  address={Heidelberg},
  year={2023},
  pages={1 Online-Ressource},
  language={ger},
  note={Aus: Umwelt interdisziplin{\"a}r, Bd. 1. Universit{\"a}tsbibliothek Heidelberg 2023},
  doi={10.11588/heidok.00031076},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-310764},
  library={UB},
}
@article{UBHD-67976046,
  author={Mischel, Maria and Esper, Jan and Keppler, Frank and Greule, Markus},
  title={[Delta]2H, [delta]13C and [delta]18O from whole wood, α-cellulose and lignin methoxyl groups in Pinus sylvestris},
  subtitle={a multi-parameter approach},
  year={2015},
  pages={553-568},
  language={eng},
  issn={1477-2639},
  volume={51},
  number={4},
  note={Gesehen am 09.05.2016 ; Im Titel sind alpha und delta als griechische Buchstaben dargestellt ; Im Titel sind die Zahlen "2", "13" und "18" hochgestellt},
  journal={Isotopes in environmental and health studies},
  doi={10.1080/10256016.2015.1056181},
}
@article{UBHD-68221841,
  author={Mulat, Daniel Girma and Polag, Daniela and Greule, Markus and Keppler, Frank},
  title={Exogenous addition of H2 for an in situ biogas upgrading through biological reduction of carbon dioxide into methane},
  year={2017},
  pages={146-156},
  language={eng},
  issn={1879-2456},
  volume={68},
  note={Im Titel ist die Zahl "2" tiefgestellt ; Gesehen am 19.02.2018},
  journal={Waste management},
  doi={10.1016/j.wasman.2017.05.054},
}
@article{UBHD-67796518,
  author={Nadalig, Thierry and Greule, Markus and Keppler, Frank},
  title={Hydrogen and carbon isotope fractionation during degradation of chloromethane by methylotrophic bacteria},
  year={2013},
  pages={893-900},
  language={eng},
  issn={2045-8827},
  volume={2},
  number={6},
  note={Gesehen am 30.03.2015},
  journal={MicrobiologyOpen},
  doi={10.1002/mbo3.124},
}
@article{UBHD-67797919,
  author={Nadalig, Thierry and Greule, Markus and Keppler, Frank},
  title={Probing the diversity of chloromethane-degrading bacteria by comparative genomics and isotopic fractionation},
  year={2014},
  pages={11 S.},
  language={eng},
  issn={1664-302X},
  volume={5(2014) Art.-Nr. 523},
  number={11 S.},
  note={Gesehen am 01.04.2015},
  journal={Frontiers in microbiology},
  doi={10.3389/fmicb.2014.00523},
}
@article{UBHD-67848002,
  author={Niedan, Volker Wolfgang and Keppler, Frank and Ahlsdorf, Bernd and Sch{\"o}ler, Heinz Friedrich},
  title={Bildung von Organohalogenen in einer kommunalen Kl{\"a}ranlage},
  year={1998},
  pages={10 S.},
  language={ger},
  issn={0083-6915},
  volume={91},
  number={Seite 175-184},
  journal={Vom Wasser},
}
@article{UBHD-67846335,
  author={Niedan, Volker Wolfgang and Keppler, Frank and Sch{\"o}ler, Heinz Friedrich},
  title={De novo formation of organochlorines in a sewage treatment plant},
  year={2003},
  pages={11 S.},
  language={eng},
  issn={1573-515X},
  volume={62},
  note={Gesehen am 15.07.2015},
  journal={Biogeochemistry},
  doi={10.1023/A:1021185730441},
}
@article{UBHD-67797915,
  author={Polag, Daniela and Leiß, Ottmar and Keppler, Frank},
  title={Age dependent breath methane in the German population},
  year={2014},
  pages={582-587},
  language={eng},
  issn={1879-1026},
  volume={481},
  note={Gesehen am 01.04.2015},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2014.02.086},
}
@article{UBHD-69124231,
  author={Polag, Daniela and Keppler, Frank},
  title={Effect of immune responses on breath methane dynamics},
  year={2023},
  pages={?},
  language={eng},
  issn={1752-7163},
  volume={17},
  note={Ver{\"o}ffentlicht: 3. August 2023 ; Gesehen am 25.09.2023},
  journal={Journal of breath research},
  doi={10.1088/1752-7163/ace9f2},
}
@article{UBHD-67796503,
  author={Polag, Daniela and Greule, Markus and Keppler, Frank},
  title={Evidence of anaerobic syntrophic acetate oxidation in biogas batch reactors by analysis of 13C carbon isotopes},
  year={2013},
  pages={365-377},
  language={eng},
  issn={1477-2639},
  volume={49},
  number={3},
  note={Im Titel ist die Zahl "13" hochgestellt ; Gesehen am 30.03.2015},
  journal={Isotopes in environmental and health studies},
  doi={10.1080/10256016.2013.805758},
}
@article{UBHD-68423079,
  author={Polag, Daniela and Keppler, Frank},
  title={Global methane emissions from the human body},
  subtitle={past, present and future},
  year={2019},
  pages={9 S.},
  language={eng},
  issn={1878-2442 and 1873-2844},
  volume={214(2019) Artikel-Nummer 116823},
  number={9 Seiten},
  note={in progress ; Gesehen am 22.08.2019},
  journal={Atmospheric environment},
  doi={10.1016/j.atmosenv.2019.116823},
}
@article{UBHD-68248955,
  author={Polag, Daniela and Keppler, Frank},
  title={Long-term monitoring of breath methane},
  year={2018},
  pages={69-77},
  language={eng},
  issn={1879-1026},
  volume={624},
  note={Gesehen am 03.05.2018},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2017.12.097},
}
@article{UBHD-67976058,
  author={Polag, Daniela and Keppler, Frank},
  title={Online monitoring of stable carbon isotopes of methane in anaerobic digestion as a new tool for early warning of process instability},
  year={2015},
  pages={161-170},
  language={eng},
  issn={1873-2976},
  volume={197},
  note={Gesehen am 09.05.2016},
  journal={Bioresource technology},
  doi={10.1016/j.biortech.2015.08.058},
}
@article{UBHD-67797172,
  author={Polag, Daniela and Keppler, Frank},
  title={Stable carbon isotopes of methane for real-time process monitoring in anaerobic digesters},
  year={2014},
  pages={153-160},
  language={eng},
  issn={1618-2863},
  volume={14},
  number={2},
  note={Gesehen am 31.03.2015},
  journal={Engineering in life sciences},
  doi={10.1002/elsc.201200201},
}
@article{UBHD-68903453,
  author={Porter, Trevor J. and Anh{\"a}user, Tobias and Halfar, Jochen and Keppler, Frank and Csank, Adam Z. and Williams, Christopher J.},
  title={Canadian arctic Neogene temperatures reconstructed from hydrogen isotopes of lignin-methoxy groups from sub-fossil wood},
  year={2022},
  pages={1-16},
  language={eng},
  issn={2572-4525},
  volume={37},
  note={Gesehen am 05.04.2022},
  journal={Paleoceanography and paleoclimatology},
  doi={10.1029/2021PA004345},
}
@article{UBHD-67847994,
  author={Pracht, Jens and Isenbeck-Schr{\"o}ter, Margot and Keppler, Frank and Sch{\"o}ler, Heinz Friedrich},
  title={Abiotic Fe(III) induced mineralization of phenolic substances},
  year={2001},
  pages={613-619},
  language={eng},
  issn={1879-1298},
  volume={44},
  number={4},
  note={Gesehen am 20.07.2015},
  journal={Chemosphere},
  doi={10.1016/S0045-6535(00)00490-2},
}
@article{UBHD-67846316,
  author={Putschew, Anke and Keppler, Frank and Jekel, Martin},
  title={Differentiation of the halogen content of peat samples using ion chromatography after combustion (TX/TOX-IC)},
  year={2003},
  pages={781-785},
  language={eng},
  issn={1618-2650},
  volume={375},
  number={6},
  note={Gesehen am 15.07.2015},
  journal={Analytical and bioanalytical chemistry},
  doi={10.1007/s00216-003-1797-1},
}
@article{UBHD-69128691,
  author={Reinig, Frederick and Wacker, Lukas and J{\"o}ris, Olaf and Oppenheimer, Clive and Guidobaldi, Giulia and Nievergelt, Daniel and Adolphi, Florian and Cherubini, Paolo and Engels, Stefan and Esper, Jan and Keppler, Frank and Land, Alexander and Lane, Christine and Pfanz, Hardy and Remmele, Sabine and Sigl, Michael and Sookdeo, Adam and B{\"u}ntgen, Ulf},
  title={Reply to: Possible magmatic CO2 influence on the Laacher See eruption date},
  year={2023},
  pages={E3-E8},
  language={eng},
  issn={1476-4687},
  volume={619},
  number={7968},
  note={Online ver{\"o}ffentlicht: 05. Juli 2023 ; Gesehen am 11.10.2023},
  journal={Nature},
  doi={10.1038/s41586-023-05966-0},
}
@article{UBHD-68007068,
  author={Riechelmann, Dana and Greule, Markus and Keppler, Frank},
  title={Climate signals in [delta]13C of wood lignin methoxyl groups from high-elevation larch trees},
  year={2016},
  pages={60-71},
  language={eng},
  issn={0031-0182},
  volume={445},
  note={Gesehen am 13.07.2016 ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Im Titel ist die Zahl "13 " hochgestellt},
  journal={Palaeogeography, palaeoclimatology, palaeoecology},
  doi={10.1016/j.palaeo.2016.01.001},
}
@article{UBHD-68221842,
  author={Riechelmann, Dana and Greule, Markus and Anh{\"a}user, Tobias and Keppler, Frank},
  title={Warm season precipitation signal in [delta]2H values of wood lignin methoxyl groups from high elevation larch trees in Switzerland},
  year={2017},
  pages={1589-1598},
  language={eng},
  issn={1097-0231},
  volume={31},
  number={19},
  note={Gesehen am 19.02.2018 ; Im Titel ist delta als griechischer Buchstabe dargestellt ; Im Titel ist 2 als Hochzahl dargestellt},
  journal={Rapid communications in mass spectrometry},
  doi={10.1002/rcm.7938},
}
@article{UBHD-68423075,
  author={Ritter, Simon M. and Isenbeck-Schr{\"o}ter, Margot and Scholz, Christian and Keppler, Frank and Klose, Lukas and Schorndorf, Nils and Stinnesbeck, Wolfgang},
  title={Subaqueous speleothems (Hells Bells) formed by the interplay of pelagic redoxcline biogeochemistry and specific hydraulic conditions in the El Zapote sinkhole, Yucatán Peninsula, Mexico},
  year={2019},
  pages={2285-2305},
  language={eng},
  issn={1726-4189},
  volume={16},
  number={11},
  note={Gesehen am 22.08.2019},
  journal={Biogeosciences},
  doi={10.5194/bg-16-2285-2019},
  keywords={Halbinsel Yucatán / Spel{\"a}othem / Hells Bells <Tropfstein>},
  url={https://doi.org/10.5194/bg-16-2285-2019},
  library={UB},
}
@article{UBHD-67837630,
  author={R{\"o}ckmann, Thomas and Keppler, Frank and Greule, Markus},
  title={Isotopic composition of H2 from wood burning},
  subtitle={dependency on combustion efficiency, moisture content, and [delta]D of local precipitation},
  year={2010},
  pages={11 S.},
  language={eng},
  issn={2169-8996},
  volume={115(2010},
  note={Im Titel ist die Zahl "2" tiefgestellt ; Im Zusatz zum Titel ist delta als griechisches Zeichen dargestellt ; Gesehen am 30.06.2015},
  journal={Journal of geophysical research},
  doi={10.1029/2009JD013188},
}
@book{UBHD-67851042,
  author={R{\"o}sing, Gerhard and Keppler, Frank},
  title={Verfahren zur Herstellung von Biogas},
  publisher={WIPO},
  address={Geneva},
  year={2007},
  pages={1 Online-Ressource (32 S.)},
  language={ger and eng and fre},
}
@article{UBHD-69237360,
  author={Sapper, Sarah Elise and Jorgensen, Christian Juncher and Schroll, Moritz and Keppler, Frank and Christiansen, Jesper Riis},
  title={Methane emissions from subglacial meltwater of three alpine glaciers in yukon, canada},
  year={2023},
  pages={1-13},
  language={eng},
  issn={1938-4246},
  volume={55},
  note={Online ver{\"o}ffentlicht: 12. Dezember 2023 ; Gesehen am 25.07.2024},
  journal={Arctic, antarctic, and alpine research},
  doi={10.1080/15230430.2023.2284456},
}
@book{UBHD-68969333,
  author={Schlaudt, Oliver and Bubenzer, Olaf and Gebhardt, Hans and Keppler, Frank and Lorenzen, Jacqueline and Reents, Friederike},
  title={Anthropoz{\"a}n},
  publisher={Universit{\"a}tsbibliothek},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (42 Seiten)},
  language={ger},
  note={In: Umwelt interdisziplin{\"a}r, Bd. 1. Universit{\"a}tsbibliothek, Heidelberg 2022},
  doi={10.11588/heidok.00031286},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-312866},
  library={UB},
}
@article{UBHD-69236326,
  author={Schmitt, Fabian and Schmitt, Axel Karl and Scholz, Christian and Keppler, Frank},
  title={High index reflective glass beads in modern river sediments as a potential marker for the Anthropocene},
  year={2024},
  pages={225-234},
  language={eng},
  issn={2363-6122},
  volume={57},
  number={2 vom: Apr.},
  note={Online ver{\"o}ffentlicht: 5. M{\"a}rz 2024 ; Illustrationen ; Gesehen am 22.07.2024},
  journal={Newsletters on stratigraphy},
  doi={10.1127/nos/2024/0816},
}
@incollection{UBHD-67851581,
  author={Sch{\"o}ler, Heinz Friedrich and Keppler, Frank},
  title={Abiotic formation of organohalogens during early diagenetic processes},
  year={2003},
  pages={63-84},
  language={eng},
  isbn={978-3-540-45293-5},
  note={Gesehen am 28.07.2015},
  booktitle={Natural production of organohalogen compounds},
  editor={Gribble, Gordon W.},
  doi={10.1007/b 10446},
}
@incollection{UBHD-67960803,
  author={Sch{\"o}ler, Heinz Friedrich and Keppler, Frank},
  title={Abiotic formation of organohalogens in the terrestrial environment},
  year={2005},
  pages={14-23},
  language={eng},
  isbn={3-936028-34-6 and 978-3-936028-34-8},
  booktitle={Volatile chlorinated hydrocarbons},
  editor={Zellner, Reinhard},
}
@article{UBHD-67845332,
  author={Sch{\"o}ler, Heinz Friedrich and Keppler, Frank and Fahimi, Isabelle Jasmine and Niedan, Volker Wolfgang},
  title={Fluxes of trichloroacetic acid between atmosphere, biota, soil, and groundwater},
  year={2003},
  pages={16 S.},
  language={eng},
  issn={1879-1298},
  volume={52},
  note={Gesehen am 14.07.2015},
  journal={Chemosphere},
  doi={10.1016/S0045-6535(03)00214-5},
}
@article{UBHD-69134272,
  author={Schorndorf, Nils and Frank, Norbert and Ritter, Simon M. and Warken, Sophie F. and Scholz, Christian and Keppler, Frank and Scholz, Denis and Weber, Michael and Aviles Olguin, Jeronimo and Stinnesbeck, Wolfgang},
  title={Mid- to late Holocene sea-level rise recorded in Hells Bells 234U/238U ratio and geochemical composition},
  year={2023},
  pages={1-11},
  language={eng},
  issn={2045-2322},
  volume={13},
  number={Artikel-ID 10011},
  note={Ver{\"o}ffentlicht: 20. Juni 2023 ; Gesehen am 27.10.2023 ; Im Titel sind die Zahlen 234 und 238 hochgestellt},
  journal={Scientific reports},
  doi={10.1038/s41598-023-36777-y},
}
@article{UBHD-68220646,
  author={Schreiber, Ulrich C. and Greule, Markus and Keppler, Frank and Mulder, Ines and Sattler, Tobias and Sch{\"o}ler, Heinz Friedrich},
  title={Organic compounds in fluid inclusions of Archean quartz},
  subtitle={analogues of prebiotic chemistry on early earth},
  year={2017},
  pages={9 S.},
  language={eng},
  issn={1932-6203},
  volume={12(2017},
  note={Gesehen am 15.02.2018},
  journal={PLOS ONE},
  doi={10.1371/journal.pone.0177570},
}
@book{UBHD-68910553,
  author={Schroll, Moritz and Lenhart, Katharina and Greiner, Steffen and Keppler, Frank},
  title={Making plant methane formation visible - insights from application of 13C-labelled dimethyl sulfoxide [research data]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (1 File)},
  language={eng},
  note={Gesehen am 25.04.2022},
  doi={10.11588/data/VJFIBD},
  url={https://doi.org/10.11588/data/VJFIBD},
  library={UB},
}
@article{UBHD-68989610,
  author={Schroll, Moritz and Lenhart, Katharina and Greiner, Steffen and Keppler, Frank},
  title={Making plant methane formation visible},
  subtitle={insights from application of 13C-labeled dimethyl sulfoxide},
  year={2022},
  pages={104-117},
  language={eng},
  issn={2575-6265},
  volume={3},
  number={3},
  note={Im Titel ist "13" bei "C-labeled" hochgestellt ; Gesehen am 28.11.2022},
  journal={Plant-environment interactions},
  doi={10.1002/pei3.10076},
  url={https://doi.org/10.1002/pei3.10076},
  library={UB},
}
@article{UBHD-69149745,
  author={Schroll, Moritz and Liu, Liu and Einzmann, Teresa and Keppler, Frank and Grossart, Hans-Peter},
  title={Methane accumulation and its potential precursor compounds in the oxic surface water layer of two contrasting stratified lakes},
  year={2023},
  pages={1-14},
  language={eng},
  issn={1879-1026},
  volume={903},
  number={Artikel-ID 166205},
  note={Gesehen am 05.12.2023},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2023.166205},
}
@book{UBHD-68593646,
  author={Schroll, Moritz and Keppler, Frank and Greule, Markus and Eckhardt, Christian and Zorn, Holger and Lenhart, Katharina},
  title={The stable carbon isotope signature of methane produced by saprotrophic fungi [dataset]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2020},
  pages={1 Online-Ressource (1 File)},
  language={eng},
  note={Gesehen am 29.06.2020},
  doi={10.11588/data/DQYPMC},
  url={https://doi.org/10.11588/data/DQYPMC},
  library={UB},
}
@article{UBHD-68593649,
  author={Schroll, Moritz and Keppler, Frank and Greule, Markus and Eckhardt, Christian and Zorn, Holger and Lenhart, Katharina},
  title={The stable carbon isotope signature of methane produced by saprotrophic fungi},
  year={2020},
  pages={21 S.},
  language={eng},
  issn={1810-6285},
  volume={(2020) Preprint},
  note={Gesehen am 29.06.2020},
  journal={Biogeosciences discussions},
  doi={10.5194/bg-2020-108},
}
@article{UBHD-68639727,
  author={Schroll, Moritz and Keppler, Frank and Greule, Markus and Eckhardt, Christian and Zorn, Holger and Lenhart, Katharina},
  title={The stable carbon isotope signature of methane produced by saprotrophic fungi},
  year={2020},
  pages={3891-3901},
  language={eng},
  issn={1726-4189},
  volume={17},
  number={14},
  note={Gesehen am 23.09.2020},
  journal={Biogeosciences},
  doi={10.5194/bg-17-3891-2020},
}
@article{UBHD-68424659,
  author={Schulze-Makuch, Dirk and Wagner, Dirk and Kounaves, Samuel P. and Mangelsdorf, Kai and Devine, Kevin G. and Vera, Jean-Pierre de and Schmitt-Kopplin, Philippe and Grossart, Hans-Peter and Parro, Victor and Kaupenjohann, Martin and Galy, Albert and Schneider, Beate and Airo, Alessandro and Fr{\"o}sler, Jan and Davila, Alfonso F. and Arens, Felix L. and Cáceres, Luis and Cornejo, Francisco Solís and Carrizo, Daniel and Dartnell, Lewis and DiRuggiero, Jocelyne and Flury, Markus and Ganzert, Lars and Gessner, Mark O. and Grathwohl, Peter and Guan, Lisa and Heinz, Jacob and Hess, Matthias and Keppler, Frank and Maus, Deborah and McKay, Christopher P. and Meckenstock, Rainer U. and Montgomery, Wren and Oberlin, Elizabeth A. and Probst, Alexander J. and Sáenz, Johan S. and Sattler, Tobias and Schirmack, Janosch and Sephton, Mark A. and Schloter, Michael and Uhl, Jenny and Valenzuela, Bernardita and Vestergaard, Gisle and W{\"o}rmer, Lars and Zamorano, Pedro},
  title={Transitory microbial habitat in the hyperarid Atacama desert},
  year={2018},
  pages={2670-2675},
  language={eng},
  issn={1091-6490},
  volume={115},
  number={11},
  note={Gesehen am 28.08.2019},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  doi={10.1073/pnas.1714341115},
}
@article{UBHD-67841741,
  author={Vigano, Ivan and Keppler, Frank},
  title={Effect of UV radiation and temperature on the emission of methane from plant biomass and structural components},
  year={2008},
  pages={937-947},
  language={eng},
  issn={1726-4189},
  volume={5},
  note={Gesehen am06.07.2015},
  journal={Biogeosciences},
  doi={10.5194/bg-5-937-2008},
}
@article{UBHD-67838263,
  author={Vigano, Ivan and Keppler, Frank and Greule, Markus},
  title={The stable isotope signature of methane emitted from plant material under UV irradiation},
  year={2009},
  pages={5637-5646},
  language={eng},
  issn={1878-2442 and 1873-2844},
  volume={43},
  number={35},
  note={Gesehen am 01.07.2015},
  journal={Atmospheric environment},
  doi={10.1016/j.atmosenv.2009.07.046},
}
@article{UBHD-67837650,
  author={Vigano, Ivan and Keppler, Frank and Greule, Markus},
  title={Water drives the deuterium content of the methane emitted from plants},
  year={2010},
  pages={3865-3873},
  language={eng},
  issn={0016-7037},
  volume={74},
  number={14},
  note={Gesehen am 30.06.2015},
  journal={Geochimica et cosmochimica acta},
  doi={10.1016/j.gca.2010.03.030},
}
@article{UBHD-68734606,
  author={Wang, Yabo and Liu, Xiaohong and Anh{\"a}user, Tobias and Lu, Qiangqiang and Zeng, Xiaomin and Zhang, Qiuliang and Wang, Keyi and Zhang, Lingnan and Zhang, Yu and Keppler, Frank},
  title={Temperature signal recorded in δ2H and δ13C values of wood lignin methoxyl groups from a permafrost forest in northeastern China},
  year={2020},
  pages={1-10},
  language={eng},
  issn={1879-1026},
  volume={727(2020) vom: Juli},
  number={Artikel-ID 138558},
  note={Im Titel ist die Zahl "2" und "13" hochgestellt ; Gesehen am 06.05.2021},
  journal={The science of the total environment},
  doi={10.1016/j.scitotenv.2020.138558},
}
@article{UBHD-67793089,
  author={Wang, Zhiping and Keppler, Frank and Greule, Markus},
  title={Non-microbial methane emissions from fresh leaves},
  subtitle={effects of physical wounding and anoxia},
  year={2011},
  pages={4915-4921},
  language={eng},
  issn={1878-2442 and 1873-2844},
  volume={45},
  number={28},
  note={Gesehen am 23.03.2015},
  journal={Atmospheric environment},
  doi={10.1016/j.atmosenv.2011.06.001},
}
@article{UBHD-67840353,
  author={Weissflog, Ludwig and Keppler, Frank and Kotte, Karsten},
  title={Late Permian changes in conditions of the atmosphere and environments caused by halogenated gases},
  year={2009},
  pages={291-295},
  language={eng},
  issn={1531-8354},
  volume={425},
  number={2},
  note={Gesehen am 02.07.2015},
  journal={Doklady earth sciences},
  doi={10.1134/S1028334X09020263},
}
@article{UBHD-68979313,
  author={Wieland, Anna and Greule, Markus and Roemer, Philipp and Esper, Jan and Keppler, Frank},
  title={Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees},
  year={2022},
  pages={1849-1866},
  language={eng},
  issn={1814-9332},
  volume={18},
  number={8 vom: Aug.},
  note={Gesehen am 27.10.2022},
  journal={Climate of the past},
  doi={10.5194/cp-18-1849-2022},
  url={https://doi.org/10.5194/cp-18-1849-2022},
  library={UB},
}
@article{UBHD-68979300,
  author={Wieland, Anna and Greule, Markus and Roemer, Philipp and Esper, Jan and Keppler, Frank},
  title={Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees},
  year={2021},
  pages={1-26},
  language={eng},
  issn={1814-9359},
  note={Gesehen am 27.10.2022},
  journal={Climate of the past discussions},
  doi={10.5194/cp-2021-135},
}
@book{UBHD-68979293,
  author={Wieland, Anna and Greule, Markus and Roemer, Philipp and Esper, Jan and Keppler, Frank},
  title={Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data]},
  publisher={Universit{\"a}t},
  address={Heidelberg},
  year={2022},
  pages={1 Online-Ressource (1 File)},
  language={ger},
  note={Gesehen am 27.10.2022},
  doi={10.11588/data/ZCMVUY},
  url={https://doi.org/10.11588/data/ZCMVUY},
  library={UB},
}
@article{UBHD-69277284,
  author={Wieland, Anna and R{\"o}mer, Philipp and Torbenson, Max and Greule, Markus and Urban, Otmar and Čáslavský, Josef and Pernicová, Natálie and Trnka, Miroslav and B{\"u}ntgen, Ulf and Esper, Jan and Keppler, Frank},
  title={Tree-ring stable isotopes in cellulose and lignin methoxy groups reveal different age-related behaviour},
  year={2024},
  pages={38-48},
  language={eng},
  issn={1040-6182},
  volume={693(2024) vom: Mai},
  note={Online verf{\"u}gbar: 19. Februar 2024, Artikelversion: 22. Mai 2024 ; Gesehen am 27.11.2024},
  journal={Quaternary international},
  doi={10.1016/j.quaint.2024.02.004},
}
@article{UBHD-67840360,
  author={Wishkerman, Asher and Keppler, Frank},
  title={Abiotic methyl bromide formation from vegetation, and iIts strong dependence on temperature},
  year={2008},
  pages={6837-6842},
  language={eng},
  issn={1520-5851},
  volume={42},
  number={18},
  note={Gesehen am 02.07.2015},
  journal={Environmental science & technology},
  doi={10.1021/es800411j},
}
@article{UBHD-67787978,
  author={Wishkerman, Asher and Greiner, Steffen and Rausch, Thomas and Keppler, Frank},
  title={Enhanced formation of methane in plant cell cultures by inhibition of cytochrome c oxidase},
  year={2011},
  pages={457-464},
  language={eng},
  issn={1365-3040},
  volume={34},
  number={3},
  note={Gesehen am 12.03.2015},
  journal={Plant, cell & environment},
  doi={10.1111/j.1365-3040.2010.02255.x},
}
@article{UBHD-67796498,
  author={W{\"u}rfel, Oliver and Greule, Markus and Keppler, Frank},
  title={Position-specific isotope analysis of the methyl group carbon in methylcobalamin for the investigation of biomethylation processes},
  year={2013},
  pages={2833-2841},
  language={eng},
  issn={1618-2650},
  volume={405},
  number={9},
  journal={Analytical and bioanalytical chemistry},
  doi={10.1007/s00216-012-6635-x},
}
@conference{UBHD-67838243,
  author={Yassaa, Noureddine and Keppler, Frank},
  title={Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results},
  year={2009},
  pages={311-318},
  language={eng},
  issn={1449-8979},
  note={Gesehen am 01.07.2015},
  doi={10.1071/EN09034},
}