Organic geochemical studies. I.
Organic geochemical criteria for differentiating molecules originating from biological and nonbiological processes, noting isoprenoid hydrocarbons genesis problems
Calvin, M.↗
Engineering topics
Calvin, M.
Publications and source records attributed to Calvin, M..
Chemical evolution
Chemical evolution and geologic history of earth, and molecular structures of organic compounds
Calvin, M.↗
The organic geochemistry of ancient sediments. II.
Oils and shales from 3 million to 2.7 billion years old analyzed for hydrocarbon content, using gas chromatography and mass spectrometry
OIL↗
Reflection Spectra as a Basis for Studying Extraterrestrial Life Semiannual Report, May 1 - Oct. 31, 1966
Planetary reflection spectroscopy for studying extraterrestrial life
PLANETARY RADIATION↗
Hydrocarbons from Australian oil, two hundred million years old.
Column chromatography used to determine hydrocarbons present in Moonie crude oil from Queensland, Australia, that is two hundred million years old
CHROMATOGRAPHY↗
The organic geochemistry of ancient sediments, part II
Chemical analysis of sediment and oil hydrocarbon content by gas chromatography and mass spectrometry to establish inception period of bio-organic evolution
MASS SPECTROMETRY↗
Formation of adenine by electron irradiation of methane, ammonia, and water
Adenine synthesis by electron irradiation of gas mixture of methane, ammonia, and water
ADENINE↗
Occurrence of biogenic steranes and pentacyclic triterpanes in an eocene shale /52 million years/ and in an early Precambrian shale /2.7 billion years/ - A preliminary report.
Isolation and identification of biogenic steranes and pentacyclic triterpanes in Eocene shale
CYCLIC HYDROCARBON↗
Evidence of life processes in a sediment two and a half billion years old.
Possible biological origin of isoprenoid alkanes found in sediments 30 million and 2-1/2 billion years old
GEOLOGY↗
Evidence of life processes in a sediment two and a half billion years old.
Evidence of life processes in sediment over two billion years old as related to biological or abiological origin of hydrocarbons from meteorites
EXTRATERRESTRIAL LIFE↗
Occurrence of isoprenoid alkanes in a Precambrian sediment
Isolation of isoprenoid hydrocarbons from alkane fractions in Precambrian sediment and associated oil seepage
HYDROCARBON↗
Occurrence of biogenic steranes and penta- cyclic triterpanes in an eocene shale /60 million years/ and in an early pre-cambrian shale /2.7 billion years Preliminary report
Occurrence of biogenic steranes and cyclic triterpanes in very old, carbonaceous sediment rock formations - Green River shale, and Soudan shale fragmentation components
SEDIMENTARY ROCK↗
Reflection spectra of bio-organic materials in the 2.5-4 mu region and the interpretation of the infrared spectrum of mars.
Discussion on reflection spectra of bioorganic materials and its use in evaluating absorption bands of mars
MARS /PLANET/↗
INTERPRETATION OF THE 3- TO 4-MICRON INFRARED SPECTRUM OF MARS
Interpretation of the 3-to 4- micron spectrum of mars through the study of infrared reflection spectra of organic and inorganic materials
MARS /PLANET/↗
Interpretation of the 3- to 4-Micron Infrared Spectrum of Mars
Infrared reflection spectra have been recorded for a large number of inorganic and organic samples, including minerals and biological specimens, for the purpose of interpreting the 3- to 4-micron spectrum of Mars. A previous suggestion that the Martian bands indicated the presence of carbohydrates is shown not to be a required conclusion. However, no satisfactory explanation is advanced and the problem remains unresolved.
INORGANIC COMPOUND↗
REFLECTION SPECTRA OF BIO-ORGANIC MATERIALS IN THE 2.5-4 MU REGION AND THE INTERPRETATION OF THE INFRARED SPECTRUM OF MARS
Reflection spectra of bio-organic materials and its use in evaluating the absorption bands of mars
PLANETARY ENVIRONMENT↗