Ursula Ehrmann

Methylphenanthrene maturity index of marine source rock extracts and crude oils from the Maracaibo Basin

Fernando Cassani, Oswaldo Gallango, Suhas C. Talukdar et al. · Organic Geochemistry · 1988 · 144 citations

Natural Sciences, Environmental Sciences, Marine Sciences +17

Trends and advances in portable analytical instrumentation

Edward B. Overton, H.P. Dharmasena, Ursula Ehrmann et al. · Field Analytical Chemistry & Technology · 1996 · 53 citations

Natural Sciences, Chemistry, Electrical Engineering +12

STUDIES ON LARGE CRUDE OIL ALKANES. II. ISOLATION AND CHARACTERIZATION OF AROMATIC WAXES AND WAXY ASPHALTENES.

Lante Carbognani, Lola De Lima, Miguel Orea et al. · Petroleum Science and Technology · 2000 · 50 citations

Engineering, Chemistry, Petroleum Engineering +13

Characterization of Acid-Soluble Oxidized Asphaltenes by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry: Insights on Oxycracking Processes and Asphaltene Structural Features

Renzo C. Silva, Jagoš R. Radović, Farouq Ahmed et al. · Energy & Fuels · 2015 · 25 citations

Engineering, Chemistry, Petroleum Engineering +15

Changes in Venezuelan Orinoco belt crude after different biotechnological approaches

Adelitza Strubinger, Ursula Ehrmann, Vladimir León et al. · Journal of Petroleum Science and Engineering · 2015 · 22 citations

Life Sciences, Biotechnology, Industrial Biotechnology +10