World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
56
Citations
11416
World Ranking
11598
National Ranking
3132

Overview

Alex L. Sessions is affiliated with the California Institute of Technology in the United States. Their research spans the fields of Environmental Science and Earth and Planetary Sciences, with an emphasis on multiple specialized subfields.

The main areas of study include Ecology, Atmospheric Science, Spectroscopy, Astronomy and Astrophysics, and Molecular Biology. Sessions' work covers a broad range of topics such as Isotope Analysis in Ecology, Geology and Paleoclimatology Research, Mass Spectrometry Techniques and Applications, Hydrocarbon Exploration and Reservoir Analysis, Methane Hydrates and Related Phenomena, Metabolomics and Mass Spectrometry Studies, and Microbial Community Ecology and Physiology.

Several recent papers showcase Sessions' research contributions:

  • Methoxyl stable isotopic constraints on the origins and limits of coal-bed methane, 2021, Science
  • Stable Isotope Analysis of Intact Oxyanions Using Electrospray Quadrupole-Orbitrap Mass Spectrometry, 2020, Analytical Chemistry
  • Clumped Isotopes Link Older Carbon Substrates With Slower Rates of Methanogenesis in Northern Lakes, 2020, Geophysical Research Letters
  • Clumped isotope effects of thermogenic methane formation: Insights from pyrolysis of hydrocarbons, 2021, Geochimica et Cosmochimica Acta
  • Room-level ventilation in schools and universities, 2022, Atmospheric Environment X

Sessions frequently collaborates with a number of co-authors, including:

  • John M. Eiler (23 publications)
  • Laura Chimiak (7 publications)
  • Jess F. Adkins (6 publications)
  • Elliott P. Mueller (6 publications)
  • Woodward W. Fischer (6 publications)

The most common venues for Sessions' publications include:

  • Geochimica et Cosmochimica Acta (10 publications)
  • Proceedings of the National Academy of Sciences (4 publications)
  • bioRxiv (Cold Spring Harbor Laboratory) (4 publications)
  • Goldschmidt2021 abstracts (3 publications)
  • Goldschmidt2022 abstracts (3 publications)

Best Publications

  • Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms

    Dirk Sachse;Isabelle Billault;Gabriel J. Bowen;Yoshito Chikaraishi

  • Fractionation of hydrogen isotopes in lipid biosynthesis

    Alex L. Sessions;Thomas W. Burgoyne;Arndt Schimmelmann;John M. Hayes

  • Compound-specific D/H ratios of lipid biomarkers from sediments as a proxy for environmental and climatic conditions

    Peter E Sauer;Timothy I Eglinton;John M Hayes;Arndt Schimmelmann

  • Controls on the D/H ratios of plant leaf waxes in an arid ecosystem

    Sarah J. Feakins;Alex L. Sessions

  • Hydrogen Isotopic (D/H) Composition of Organic Matter During Diagenesis and Thermal Maturation

    Arndt Schimmelmann;Alex L. Sessions;Maria Mastalerz

  • Sulfate was a trace constituent of Archean seawater

    Sean Andrew Crowe;Sean Andrew Crowe;Guillaume Paris;Sergei Katsev;CarriAyne Jones;CarriAyne Jones

  • Formation temperatures of thermogenic and biogenic methane

    D.A. Stolper;M. Lawson;C.L. Davis;A.A. Ferreira

  • Isotope‐ratio detection for gas chromatography

    Alex L. Sessions

  • Biosynthesis of 2-methylbacteriohopanepolyols by an anoxygenic phototroph

    Sky E. Rashby;Alex L. Sessions;Roger E. Summons;Dianne K. Newman;Dianne K. Newman;Dianne K. Newman

  • Isotopic exchange of carbon-bound hydrogen over geologic timescales

    Alex L. Sessions;Sean P. Sylva;Roger E. Summons;John M. Hayes

  • Identification of a methylase required for 2-methylhopanoid production and implications for the interpretation of sedimentary hopanes

    Paula V. Welander;Maureen L. Coleman;Alex L. Sessions;Roger Everett Summons

  • Large D/H variations in bacterial lipids reflect central metabolic pathways

    Xinning Zhang;Aimee L. Gillespie;Alex L. Sessions

  • Hopanoids Play a Role in Membrane Integrity and pH Homeostasis in Rhodopseudomonas palustris TIE-1

    Paula V. Welander;Ryan C. Hunter;Lichun Zhang;Alex L. Sessions

  • Distinguishing and understanding thermogenic and biogenic sources of methane using multiply substituted isotopologues

    D. A. Stolper;D. A. Stolper;A. M. Martini;M. Clog;P. M. Douglas

  • Combined ^(13)C–D and D–D clumping in methane: Methods and preliminary results

    D. A. Stolper;A. L. Sessions;A. A. Ferreira;E. V. Santos Neto

  • Seasonal changes in D/H fractionation accompanying lipid biosynthesis in Spartina alterniflora

    Alex L. Sessions

  • Geochemistry and geobiology of a present-day serpentinization site in California: The Cedars

    Penny L. Morrill;Penny L. Morrill;J. Gijs Kuenen;Orion J. Johnson;Shino Suzuki

  • Sulfur isotopes of organic matter preserved in 3.45-billion-year-old stromatolites reveal microbial metabolism

    Tomaso R. R. Bontognali;Alex L. Sessions;Abigail C. Allwood;Woodward W. Fischer

  • Organic Reference Materials for Hydrogen, Carbon, and Nitrogen Stable Isotope-Ratio Measurements: Caffeines, n-Alkanes, Fatty Acid Methyl Esters, Glycines, l-Valines, Polyethylenes, and Oils

    Arndt Schimmelmann;Haiping Qi;Tyler B. Coplen;Willi A. Brand

  • MC-ICP-MS measurement of δ34S and ∆33S in small amounts of dissolved sulfate

    Guillaume Paris;Alex L. Sessions;Adam V. Subhas;Jess F. Adkins

  • Identification of Novel Methane-, Ethane-, and Propane-Oxidizing Bacteria at Marine Hydrocarbon Seeps by Stable Isotope Probing

    Molly C. Redmond;David L. Valentine;Alex L. Sessions

  • SUPPLEMENTARY MATERIAL FOR "Molecular paleohydrology: interpreting the hydrogen-isotopic composition of lipid biomarkers from photosynthesizing organisms"

    Dirk Sachse;Isabelle Billault;Gabriel J. Bowen;Yoshito Chikaraishi

Frequent Co-Authors

John M. Eiler
John M. Eiler California Institute of Technology
Jess F. Adkins
Jess F. Adkins California Institute of Technology
Dianne K. Newman
Dianne K. Newman California Institute of Technology
John M. Hayes
John M. Hayes Woods Hole Oceanographic Institution
Enno Schefuß
Enno Schefuß University of Bremen
Woodward W. Fischer
Woodward W. Fischer California Institute of Technology
Victoria J. Orphan
Victoria J. Orphan California Institute of Technology
Arndt Schimmelmann
Arndt Schimmelmann Indiana University
Sarah J. Feakins
Sarah J. Feakins University of Southern California

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Chemistry in the USA opens doors to a variety of related online degrees and career options. For those interested in legal aspects of science, there are specialized degrees for paralegals that combine scientific knowledge with legal expertise.

The pharmaceutical industry offers lucrative career paths as well. A popular route is becoming a pharmaceutical sales representative, where understanding of chemistry and medicine is essential. For insight into compensation and growth, see the detailed guide on pharmaceutical sales salary.

Those looking to advance their professional credentials can explore the education requirements to become a pharmacist. This path demands rigorous study and training, detailed comprehensively in the pharmacist education requirements.

Another intriguing career option is working in forensic science. Becoming a medical examiner assistant involves specialized knowledge of chemistry and biology, with a clear pathway described in how to become a medical examiner assistant.

Best Scientists Citing Alex L. Sessions

Trending Scientists