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Danielle S. Gruen
Researcher at University of Pittsburgh
Publications - 28
Citations - 796
Danielle S. Gruen is an academic researcher from University of Pittsburgh. The author has contributed to research in topics: Methane & Medicine. The author has an hindex of 9, co-authored 23 publications receiving 568 citations. Previous affiliations of Danielle S. Gruen include Massachusetts Institute of Technology & Woods Hole Oceanographic Institution.
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Journal ArticleDOI
Nonequilibrium clumped isotope signals in microbial methane
David T. Wang,David T. Wang,Danielle S. Gruen,Danielle S. Gruen,Barbara Sherwood Lollar,Kai-Uwe Hinrichs,Lucy C. Stewart,James F. Holden,Alexander N. Hristov,John W. Pohlman,Penny L. Morrill,Martin Könneke,Kyle B. Delwiche,Eoghan P. Reeves,C. N. Sutcliffe,Daniel J. Ritter,Jeffrey S. Seewald,Jennifer C. McIntosh,Harold F. Hemond,Michael D. Kubo,Dawn Cardace,Tori M. Hoehler,Shuhei Ono +22 more
TL;DR: This article showed that methanogenesis proceeding at relatively high rates in cattle, surface environments, and laboratory cultures exerts kinetic control on CH3D abundances and results in anomalously elevated formation-temperature estimates.
Nonequilibrium clumped isotope signals in microbial methane
David T. Wang,David T. Wang,Danielle S. Gruen,Danielle S. Gruen,Barbara Sherwood Lollar,Kai-Uwe Hinrichs,Lucy C. Stewart,James F. Holden,Alexander N. Hristov,John W. Pohlman,Penny L. Morrill,Martin Könneke,Kyle B. Delwiche,Eoghan P. Reeves,C. N. Sutcliffe,Daniel J. Ritter,Jeffrey S. Seewald,Jennifer C. McIntosh,Harold F. Hemond,Michael D. Kubo,Dawn Cardace,Tori M. Hoehler,Shuhei Ono +22 more
TL;DR: It is shown that methanogenesis proceeding at relatively high rates in cattle, surface environments, and laboratory cultures exerts kinetic control on 13CH3D abundances and results in anomalously elevated formation-temperature estimates, and quantitatively that H2 availability accounts for this effect.
Journal ArticleDOI
Measurement of a Doubly Substituted Methane Isotopologue, 13CH3D, by Tunable Infrared Laser Direct Absorption Spectroscopy
Shuhei Ono,David T. Wang,Danielle S. Gruen,Barbara Sherwood Lollar,Mark S. Zahniser,Barry McManus,David D. Nelson +6 more
TL;DR: A new method to precisely determine the relative abundance of (13)CH3D by using tunable infrared laser direct absorption spectroscopy (TILDAS) to distinguish geological and biological sources of methane in the atmosphere, hydrosphere, and lithosphere is developed.
Journal ArticleDOI
Effect of 3-nitrooxypropanol on methane and hydrogen emissions, methane isotopic signature, and ruminal fermentation in dairy cows
J.C. Lopes,L.F. de Matos,M.T. Harper,F. Giallongo,Joonpyo Oh,Danielle S. Gruen,Shuhei Ono,Maik Kindermann,Stephane Duval,Alexander N. Hristov +9 more
TL;DR: It is demonstrated that a substantial inhibition of enteric methane emission by 3NOP in dairy cows was accompanied with increased hydrogen emission and decreased acetate-to-propionate ratio; however, neither an effect on rumen archaeal community composition nor a significant change in the isotope composition of methane was observed.
Journal ArticleDOI
Association of Prehospital Plasma With Survival in Patients With Traumatic Brain Injury: A Secondary Analysis of the PAMPer Cluster Randomized Clinical Trial
Danielle S. Gruen,Francis X. Guyette,Joshua B. Brown,David O. Okonkwo,Ava M. Puccio,Insiyah Campwala,Matthew T. Tessmer,Brian J. Daley,Richard S. Miller,Brian G. Harbrecht,Jeffrey A. Claridge,Herb A. Phelan,Matthew D. Neal,Brian S. Zuckerbraun,Mark H. Yazer,Timothy R. Billiar,Jason L. Sperry +16 more
TL;DR: In this secondary analysis of a predefined subgroup of 166 severely injured patients with trauma from a cluster randomized clinical trial, prehospital plasma administration was associated with lower mortality in patients with TBI.