Results 181 to 190 of about 349,421 (237)
Some of the next articles are maybe not open access.
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1979
During the past 7 years, the National Science Foundation-Research Applied to National Needs (R. A. N. N.) programme has supported extensive interdisciplinary research concerned with Pb, Cd and other hazardous trace metals. Various aspects of geochemistry and pollution research at the universities of Missouri, Illinois, Colorado State and Purdue are ...
openaire +3 more sources
During the past 7 years, the National Science Foundation-Research Applied to National Needs (R. A. N. N.) programme has supported extensive interdisciplinary research concerned with Pb, Cd and other hazardous trace metals. Various aspects of geochemistry and pollution research at the universities of Missouri, Illinois, Colorado State and Purdue are ...
openaire +3 more sources
Alkylcyclohexanes in Environmental Geochemistry
Environmental Forensics, 2002The n -alkylated cyclohexanes (CHs) are a homologous series of hydrocarbon compounds that are commonly present in crude oil and refinery products such as diesel fuel. These compounds exhibit specific distribution patterns for different fuel types, providing useful fingerprints for characterizing petroleum products, especially after degradation of n ...
Frances D. Hostettler +1 more
openaire +2 more sources
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1979
This paper discusses the importance of geochemistry as a determining factor in the evolutionary development of plant assemblages. Three contrasting examples of geochemical systems are described and considered in relation to their effects on plant growth and development.
openaire +3 more sources
This paper discusses the importance of geochemistry as a determining factor in the evolutionary development of plant assemblages. Three contrasting examples of geochemical systems are described and considered in relation to their effects on plant growth and development.
openaire +3 more sources
FRONTIERS IN GEOCHEMISTRY: CONTRIBUTIONS OF GEOCHEMISTRY TO THE STUDY OF THE EARTH
American Mineralogist, 2012By Russell S. Harmon, Andrew Parker, Editors. ( 2011) Wiley-Blackwell, paperback 280 pages. ISBN: 978-1-4051-9338-2 Over the last few decades, geochemistry has increasingly played a leading role in quantitative Earth sciences across an ever-broadening range of topics. Despite its immense impact, there are surprisingly few textbooks on the subject and
Simon Turner, Heather Handley
openaire +2 more sources
Archean granitoids: classification, petrology, geochemistry and origin
Special Publications, 2019This paper describes the petrology, geochemistry and petrogenesis of Archean granitoids. Archean granites define a continuum of compositions between several end members: (i) magmas that originated by partial melting of a range of crustal sources, from ...
J. Moyen
semanticscholar +1 more source
Chemical Geology, 1972
Abstract Chemical studies of various modern and fossil spore walls of gymnosperms, angiosperms, pteridosperms, fungi and algae show the majority to contain sporopollenin now known to be derived from carotenoid esters by an oxidative polymerisation process. Chemical studies on microfossil walls and associated insoluble organic matter (kerogen) present
J. Brooks, G. Shaw
openaire +2 more sources
Abstract Chemical studies of various modern and fossil spore walls of gymnosperms, angiosperms, pteridosperms, fungi and algae show the majority to contain sporopollenin now known to be derived from carotenoid esters by an oxidative polymerisation process. Chemical studies on microfossil walls and associated insoluble organic matter (kerogen) present
J. Brooks, G. Shaw
openaire +2 more sources
Environmental Geochemistry and Health, 2022
Haofan Xu, Chaosheng Zhang
semanticscholar +1 more source
Haofan Xu, Chaosheng Zhang
semanticscholar +1 more source
2017
This chapter explores how evidence of hydrocarbon seepage from charged petroleum reservoirs can be used in exploration. The discussion will cover microseepage onshore and macroseepage both onshore and offshore. Microseepage will focus on the direct hydrocarbon detection methods for soil gas and adsorber technologies.
openaire +2 more sources
This chapter explores how evidence of hydrocarbon seepage from charged petroleum reservoirs can be used in exploration. The discussion will cover microseepage onshore and macroseepage both onshore and offshore. Microseepage will focus on the direct hydrocarbon detection methods for soil gas and adsorber technologies.
openaire +2 more sources
Organic Geochemistry, 1984
Abstract Asphaltenes derived from both oil and source-rocks have been studied by pyrolysis-gas chromatography. The pyrograms obtained at 450 and 550°C show that asphaltene structure is very close to the structure of the kerogen of the same sample. They can be interpreted as kerogen moieties, resulting from its early evolution.
J. Roucache, R. Pelet, Françoise Behar
openaire +2 more sources
Abstract Asphaltenes derived from both oil and source-rocks have been studied by pyrolysis-gas chromatography. The pyrograms obtained at 450 and 550°C show that asphaltene structure is very close to the structure of the kerogen of the same sample. They can be interpreted as kerogen moieties, resulting from its early evolution.
J. Roucache, R. Pelet, Françoise Behar
openaire +2 more sources
2017
This chapter discusses how petroleum geochemistry can be applied to field development, production practices, and reservoir problems. It will demonstrate that the concepts, tools, and methods developed for evaluating source rocks, crude oils, and natural gases are applicable to many problems in production and development.
openaire +2 more sources
This chapter discusses how petroleum geochemistry can be applied to field development, production practices, and reservoir problems. It will demonstrate that the concepts, tools, and methods developed for evaluating source rocks, crude oils, and natural gases are applicable to many problems in production and development.
openaire +2 more sources