C
Cyril Ponnamperuma
Researcher at University of Maryland, College Park
Publications - 157
Citations - 5964
Cyril Ponnamperuma is an academic researcher from University of Maryland, College Park. The author has contributed to research in topics: Amino acid & Atmosphere. The author has an hindex of 35, co-authored 157 publications receiving 5765 citations. Previous affiliations of Cyril Ponnamperuma include National Autonomous University of Mexico & Ames Research Center.
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Journal ArticleDOI
Evidence for extraterrestrial amino-acids and hydrocarbons in the Murchison meteorite.
Keith A. Kvenvolden,James G. Lawless,Katherine Pering,Etta Peterson,Jose Flores,Cyril Ponnamperuma,Isaac R. Kaplan,Carleton B. Moore +7 more
TL;DR: Organic molecules found in meteorites seem to have been formed before the meteorites reached Earth, according to new research.
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Infrared observations of the saturnian system from voyager 1.
Rudolf A. Hanel,Barney J. Conrath,F. M. Flasar,V. G. Kunde,William C. Maguire,John C. Pearl,J. A. Pirraglia,Robert E. Samuelson,L. Herath,Matthew A. Allison,Dale P. Cruikshank,Daniel Gautier,Peter J. Gierasch,Linda J. Horn,R. Koppany,Cyril Ponnamperuma +15 more
TL;DR: During the passage of Voyager 1 through the Saturn system, the infrared instrument acquired spectral and radiometric data on Saturn, the rings, and Titan and other satellites, implying a depletion of helium in the atmosphere of Saturn relative to that of Jupiter.
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Identification of gaseous SO2 and new upper limits for other gases on Io
John C. Pearl,Rudolf A. Hanel,Virgil G. Kunde,William C. Maguire,K. Fox,S. K. Gupta,Cyril Ponnamperuma,F. Raulin +7 more
TL;DR: In this paper, the identification of gaseous sulfur dioxide on Io by Voyager 1 is reported, and preliminary upper limits for other atmospheric gases are presented, with a depletion of hydrogen, carbon and nitrogen.
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Nonprotein Amino Acids in the Murchison Meteorite
TL;DR: Tentative evidence is presented for the presence of N-methylalanine, N-ethylglycine, beta-aminoisobutyric acid, and norvaline that appear to be extraterrestrial in origin and may provide new evidence for the hypothesis of chemical evolution.
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Infrared observations of the jovian system from voyager 1.
Rudolf A. Hanel,Barney J. Conrath,M. Flasar,Virgil G. Kunde,Paul D. Lowman,William C. Maguire,John C. Pearl,J. A. Pirraglia,Robert E. Samuelson,D. Gautier,Peter J. Gierasch,S. Kumar,Cyril Ponnamperuma +12 more
TL;DR: The infrared spectroscopy and radiometry investigation has obtained spectra of Jupiter and its satellites between approximately 180 and 2500 cm–1 with a spectral resolution of 4.3cm–1, showing clear evidence of H2, CH4 C2H2, C2 H6, CH3D, NH3, PH3, H2O, and GeH4.