Items where Author is "Hallmann, Christian"

Hoshino, Y, Nettersheim, BJ, Gold, DA, Hallmann, C, Vinnichenko, G, van Maldegem, LM, Bishop, C, Brocks, JJ and Gaucher, EA (2023) Genetics re-establish the utility of 2-methylhopanes as cyanobacterial biomarkers before 750 million years ago. Nature Ecology & Evolution. doi:10.1038/s41559-023-02223-5

Brocks, JJ, Nettersheim, BJ, Adam, P, Schaeffer, P, Jarrett, AJM, Güneli, N, Liyanage, T, van Maldegem, LM, Hallmann, C and Hope, JM (2023) Lost world of complex life and the late rise of the eukaryotic crown. Nature, 618(7966). 767-773. doi:10.1038/s41586-023-06170-w

Bobrovskiy, I, Hope, JM, Nettersheim, BJ, Volkman, JK, Hallmann, C and Brocks, JJ (2021) Algal origin of sponge sterane biomarkers negates the oldest evidence for animals in the rock record. Nature Ecology & Evolution, 5(2). 165-168. doi:10.1038/s41559-020-01334-7

Dummann, W, Steinig, S, Hofmann, P, Lenz, M, Kusch, S, Flögel, S, Herrle, JO, Hallmann, C, Rethemeyer, J, Kasper, HU and Wagner, T (2021) Driving mechanisms of organic carbon burial in the Early Cretaceous South Atlantic Cape Basin (DSDP Site 361). Climate of the Past, 17(1). 469-490. doi:10.5194/cp-17-469-2021

French, KL, Leider, A and Hallmann, C (2020) Comparability and reproducibility of biomarker ratio values measured by GC-QQQ-MS. Organic Geochemistry, 150. 104124. doi:10.1016/j.orggeochem.2020.104124

van Maldegem, LM, Nettersheim, BJ, Leider, A, Brocks, JJ, Adam, P, Schaeffer, P and Hallmann, C (2020) Geological alteration of Precambrian steroids mimics early animal signatures. Nature Ecology & Evolution. doi:10.1038/s41559-020-01336-5

Schmidt, C, Nikeleit, V, Schaedler, F, Leider, A, Lueder, U, Bryce, C, Hallmann, C and Kappler, A (2020) Metabolic responses of a phototrophic co-culture enriched from a freshwater sediment on changing substrate availability and its relevance for biogeochemical iron cycling. Geomicrobiology Journal. 1-15. doi:10.1080/01490451.2020.1837303

Wagner, S, Schubotz, F, Kaiser, K, Hallmann, C, Waska, H, Rossel, PE, Hansman, R, Elvert, M, Middelburg, JJ, Engel, A, Blattmann, TM, Catalá, TS, Lennartz, ST, Gomez-Saez, GV, Pantoja-Gutiérrez, S, Bao, R and Galy, V (2020) Soothsaying DOM: a current perspective on the future of oceanic dissolved organic carbon. Frontiers in Marine Science, 7. doi:10.3389/fmars.2020.00341

van Maldegem, LM, Sansjofre, P, Weijers, JWH, Wolkenstein, K, Strother, PK, Wörmer, L, Hefter, J, Nettersheim, BJ, Hoshino, Y, Schouten, S, Sinninghe Damsté, JS, Nath, N, Griesinger, C, Kuznetsov, NB, Elie, M, Elvert, M, Tegelaar, E, Gleixner, G and Hallmann, C (2019) Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth. Nature Communications, 10(1). doi:10.1038/s41467-019-08306-x

Illing, CJ, Hallmann, C, Scott, AC, Collinson, ME, Briggs, DEG, Strauss, H and Summons, RE (2019) Heterogeneity of free and occluded bitumen in a natural maturity sequence from Oligocene Lake Enspel. Geochimica et Cosmochimica Acta, 245. 240-265. doi:10.1016/j.gca.2018.10.021

Luo, G, Yang, H, Algeo, TJ, Hallmann, C and Xie, S (2019) Lipid biomarkers for the reconstruction of deep-time environmental conditions. Earth-Science Reviews, 189. 99-124. doi:10.1016/j.earscirev.2018.03.005

Leider, A, Richter-Brockmann, S, Nettersheim, BJ, Achten, C and Hallmann, C (2019) Low-femtogram sensitivity analysis of polyaromatic hydrocarbons using GC-APLI-TOF mass spectrometry: Extending the target window for aromatic steroids in early Proterozoic rocks. Organic Geochemistry, 129. 77-87. doi:10.1016/j.orggeochem.2019.01.015

Nettersheim, BJ, Brocks, JJ, Schwelm, A, Hope, JM, Not, F, Lomas, M, Schmidt, C, Schiebel, R, Nowack, ECM, de Deckker, P, Pawlowski, J, Bowser, SS, Bobrovskiy, I, Zonneveld, KAF, Kucera, M, Stuhr, M and Hallmann, C (2019) Putative sponge biomarkers in unicellular Rhizaria question an early rise of animals. Nature Ecology & Evolution. doi:10.1038/s41559-019-0806-5

Bobrovskiy, I, Hope, JM, Ivantsov, A, Nettersheim, BJ, Hallmann, C and Brocks, JJ (2018) Ancient steroids establish the Ediacaran fossil Dickinsonia as one of the earliest animals. Science, 361(6408). 1246-1249. doi:10.1126/science.aat7228

Muller, É, Thomazo, C, Stüeken, EE, Hallmann, C, Leider, A, Chaduteau, C, Buick, R, Baton, F, Philippot, P and Ader, M (2018) Bias in carbon concentration and δ 13 C measurements of organic matter due to cleaning treatments with organic solvents. Chemical Geology, 493. 405-412. doi:10.1016/j.chemgeo.2018.06.018

Peters, CA, Hallmann, C and George, SC (2018) Phenolic compounds in oil-bearing fluid inclusions: implications for water-washing and oil migration. Organic Geochemistry, 118. 36-46. doi:10.1016/j.orggeochem.2018.02.001

Hoshino, Y, Poshibaeva, A, Meredith, W, Snape, C, Poshibaev, V, Versteegh, GJM, Kuznetsov, N, Leider, A, van Maldegem, L, Neumann, M, Naeher, S, Moczydłowska, M, Brocks, JJ, Jarrett, AJ, Tang, Q, Xiao, S, McKirdy, D, Das, SK, Alvaro, JJ, Sansjofre, P and Hallmann, C (2017) Cryogenian evolution of stigmasteroid biosynthesis. Science Advances, 3(9). e1700887. doi:10.1126/sciadv.1700887

Brocks, JJ, Jarrett, AJM, Sirantoine, E, Hallmann, C, Hoshino, Y and Liyanage, T (2017) The rise of algae in Cryogenian oceans and the emergence of animals. Nature, 548(7669). 578-581. doi:10.1038/nature23457

Leider, A, Schumacher, TC and Hallmann, C (2016) Enhanced procedural blank control for organic geochemical studies of critical sample material. Geobiology, 14(5). 469-482. doi:10.1111/gbi.12183

Ferralis, N, Matys, ED, Knoll, AH, Hallmann, C and Summons, RE (2016) Rapid, direct and non-destructive assessment of fossil organic matter via microRaman spectroscopy. Carbon, 108. 440-449. doi:10.1016/j.carbon.2016.07.039

Huang, Y, Aponte, JC, Zhao, J, Tarozo, R and Hallmann, C (2015) Hydrogen and carbon isotopic ratios of polycyclic aromatic compounds in two CM2 carbonaceous chondrites and implications for prebiotic organic synthesis. Earth and Planetary Science Letters, 426. 101-108. doi:10.1016/j.epsl.2015.06.027

French, KL, Hallmann, C, Hope, JM, Schoon, PL, Zumberge, JA, Hoshino, Y, Peters, CA, George, SC, Love, GD, Brocks, JJ, Buick, R and Summons, RE (2015) Reappraisal of hydrocarbon biomarkers in Archean rocks. Proceedings of the National Academy of Sciences, 112(19). 5915-5920. doi:10.1073/pnas.1419563112

Feulner, G, Hallmann, C and Kienert, H (2015) Snowball cooling after algal rise. Nature Geoscience, 8(9). 659-662. doi:10.1038/ngeo2523