Helium‐flushed sheathed nickel tube reactor for continuous flow oxygen stable isotope compound‐specific analysis

Autor: Carl G. Johnson, Valier V. Galy

Publikováno v: Rapid Communications in Mass Spectrometry. 36

Compound-specific oxygen stable isotope analysis has been commercially available for about 20 years but the technique has been infrequently applied and practical operating knowledge is limited. Existing reactor designs and chemistry fail to fully exc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e799e28ce8dbcf9bc971f094afe9ddd3
https://doi.org/10.1002/rcm.9252

Allochthonous sources and dynamic cycling of ocean dissolved organic carbon revealed by carbon isotopes

Autor: Ann P. McNichol, Prosper K. Zigah, Chiara Santinelli, Li Xu, Daniel J. Repeta, David M. Karl, Carl G. Johnson

Publikováno v: Geophysical research letters (Online) 44 (2017): 2407–2415. doi:10.1002/2016GL071348
info:cnr-pdr/source/autori:Zigah PK, McNichol AP, Xu L, Johnson C, Santinelli C, Karl D, Repeta DJ/titolo:Allochthonous sources and dynamic cycling of ocean dissolved organic carbon revealed by carbon isotopes/doi:10.1002%2F2016GL071348/rivista:Geophysical research letters (Online)/anno:2017/pagina_da:2407/pagina_a:2415/intervallo_pagine:2407–2415/volume:44

We present concentration and isotopic profiles of total, size, and polarity fractionated dissolved organic carbon (DOC) from Station ALOHA (A Long-term Oligotrophic Habitat Assessment), an oligotrophic site in the North Pacific Ocean. The data show t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21db856059840ec472e6fc89d05fbc8a
https://doi.org/10.1002/2016gl071348

Climate oscillations reflected within the microbiome of Arabian Sea sediments

Autor: William D. Orsi, Marco J. L. Coolen, Jordon D. Hemingway, Cornelia Wuchter, Liviu Giosan, Mitchell Lee, Carl G. Johnson, Guillem Chust, Kuldeep D. More, Xabier Irigoien, Lijun He, Valier Galy

Publikováno v: Scientific Reports
Scientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)

Selection of microorganisms in marine sediment is shaped by energy-yielding electron acceptors for respiration that are depleted in vertical succession. However, some taxa have been reported to reflect past depositional conditions suggesting they hav

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24bb9cd9968de64ea8d2d9c4e5d85bd7
http://europepmc.org/articles/PMC5519670

Biological formation of ethane and propane in the deep marine subsurface

Autor: Arthur J. Spivack, Kai-Uwe Hinrichs, Laura R. Hmelo, John M. Hayes, Carl G. Johnson, Nils G. Holm, Sean P. Sylva, Wolfgang Bach

Publikováno v: Proceedings of the National Academy of Sciences. 103:14684-14689

Concentrations and isotopic compositions of ethane and propane in cold, deeply buried sediments from the southeastern Pacific are best explained by microbial production of these gases in situ . Reduction of acetate to ethane provides one feasible mec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7c928683ab3ce5cbea43947fc4d5d32
https://doi.org/10.1073/pnas.0606535103

Innovative methods for determining alkenone unsaturation indices

Autor: Robert K. Nelson, Glenn S. Frysinger, Richard B. Gaines, Naohiko Ohkouchi, Christopher M. Reddy, Carl G. Johnson, Timothy I. Eglinton

Publikováno v: Marine Chemistry. 83:5-22

Standards, total lipid extracts and crudely fractionated samples as well as extensively purified alkenone references were analyzed by conventional single column gas chromatography (GC), selective two-dimensional GC (GC–GC), comprehensive two-dimens

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28099de850551cc969c6b293397a3ff9
https://doi.org/10.1016/s0304-4203(03)00092-6