X
Search Filters
Format Format
Subjects Subjects
Subjects Subjects
X
Sort by Item Count (A-Z)
Filter by Count
hopanoic acids (14) 14
geochemistry & geophysics (10) 10
maracaibo basin (6) 6
biomarkers (5) 5
carboxylic-acids (5) 5
indicators (5) 5
geosciences, multidisciplinary (4) 4
hopanoids (4) 4
hydrocarbons (4) 4
sediments (4) 4
shale oils (4) 4
analysis (3) 3
biodegradation (3) 3
geochemistry (3) 3
kerogen (3) 3
petroleum (3) 3
source rocks (3) 3
25-norhopanoic acids (2) 2
ancient sediments (2) 2
biological markers (2) 2
black shales (2) 2
carboxylic acids (2) 2
chemical degradation (2) 2
cold seeps (2) 2
crude oil (2) 2
crude oils (2) 2
distributions (2) 2
dryopteric acid a (2) 2
dryopteric acid b (2) 2
dryopteris crassirhizoma (2) 2
egypt (2) 2
energy & fuels (2) 2
geology (2) 2
hopanes (2) 2
hopanoic acid (2) 2
human immunodeficiency virus-1 protease (2) 2
isomerization (2) 2
maturation (2) 2
methylococcus-capsulatus (2) 2
migration (2) 2
organic acids (2) 2
parameters (2) 2
rock-eval (2) 2
signatures (2) 2
steroids (2) 2
25-norhopanes (1) 1
28,30-bisnorhopanes (1) 1
28-norhopanoic acids (1) 1
3-beta-methylhopanoids (1) 1
abu tartur (1) 1
activities (1) 1
aerobic methanotrophic bacteria (1) 1
alkenones (1) 1
alkylphenol (1) 1
alkylphenols (1) 1
anaerobic oxidation (1) 1
bacteria (1) 1
bacteriohopanepolyols (1) 1
baltic sea (1) 1
basin (1) 1
basins (1) 1
biogeochemistry (1) 1
biomarkers in kerogen (1) 1
bituminous materials (1) 1
black shale (1) 1
c-32 hopanoic acid (1) 1
c-37:4 (1) 1
c32 hopanoic acid (1) 1
c37:4 (1) 1
calibration (1) 1
campanian-maastrichtian (1) 1
campanian–maastrichtian (1) 1
carbazole distributions (1) 1
carbon (1) 1
carbon isotope (1) 1
carbon-isotope (1) 1
carbonates (1) 1
catalysis (1) 1
cerium anomalies (1) 1
chemistry, medicinal (1) 1
chemistry, multidisciplinary (1) 1
clay-minerals (1) 1
closed-system pyrolysis (1) 1
coal industry (1) 1
coccolithophorid emiliania-huxleyi (1) 1
constituents (1) 1
contact metamorphism (1) 1
contamination assessment (1) 1
convergent margin (1) 1
corrosion (1) 1
crassirhizoma (1) 1
cretaceous-palaeogene (1) 1
crude oil biodegradation (1) 1
cyclic terpenoids (1) 1
decarboxylation (1) 1
deep biosphere (1) 1
deep subsurface (1) 1
deep-subsurface (1) 1
deposition (1) 1
depositional environment (1) 1
more...
Language Language
Publication Date Publication Date
Click on a bar to filter by decade
Slide to change publication date range


Organic Geochemistry, ISSN 0146-6380, 02/2015, Volume 79, pp. 31 - 43
•25-Norhopanes formed in medium and heavy level of oil biodegradation.•They are the major, but not the only, products from hopane... 
Biodegradation | Mass balance | 25-Norhopanes | Crude oil | Hopanes | 25-Norhopanoic acids | Hopanoic acids | Niger Delta | MIGRATION | DEEP SUBSURFACE | PETROLEUM RESERVOIRS | NATURAL-PRODUCTS | CRUDE OILS | GEOCHEMISTRY & GEOPHYSICS | MARACAIBO BASIN | INDICATORS | VENEZUELA | CARBOXYLIC-ACIDS | Petroleum mining | Genetic research
Journal Article
Organic Geochemistry, ISSN 0146-6380, 2006, Volume 37, Issue 9, pp. 1085 - 1100
The presence of three families of hopanoic acids, 17,21-secohopanoic acids, 25-norhopanoic acids, and 28-norhopanoic acids, is discussed. Oils from West... 
HOPANOIC ACIDS | GEOCHEMISTRY & GEOPHYSICS | MARACAIBO BASIN | WEST SIBERIAN BASIN | PETROLEUM | ANCIENT SEDIMENTS | MONTEREY FORMATION | CARBON-ISOTOPE | UINTA BASIN | MARINE EVAPORITIC OILS | CARBOXYLIC-ACIDS | Hydrocarbons | Petroleum industry | Petroleum | Natural history | Rocks, Sedimentary | Geophysics
Journal Article
Organic Geochemistry, ISSN 0146-6380, 11/2000, Volume 31, Issue 11, pp. 1059 - 1073
Journal Article
Organic Geochemistry, ISSN 0146-6380, 10/2017, Volume 112, pp. 93 - 104
Journal Article
Chemical Geology, ISSN 0009-2541, 2005, Volume 218, Issue 1, pp. 117 - 133
A series of C 29–C 31 28-norhopanoic acids occur in Neogene marine sediments of the Onnagawa, Funakawa and Tentokuji Formations, northeastern Japan, and in the... 
Hopanoic acids | Bacteria | Cold seeps | Hopanoids | 28-Norhopanoic acids | Carbon isotope | hopanoic acids | MATTER | bacteria | PETROLEUM | 28,30-BISNORHOPANES | PROOF | TRITERPANES | hopanoids | GEOCHEMISTRY & GEOPHYSICS | 28-norhopanoic acids | ORGANIC GEOCHEMISTRY | carbon isotope | cold seeps | Marine sediments | Hydrothermal systems (Geology) | Geology | Shale oils | Ecosystems
Journal Article
Chemical and Pharmaceutical Bulletin, ISSN 0009-2363, 2008, Volume 56, Issue 5, pp. 711 - 714
Two new hopane type triterpenes, named dryopteric acids A (1) and B (2), were isolated from the Rhizome of Dryopteris crassirhizoma (Aspiadaceae) together with... 
dryopteric acid A | human immunodeficiency virus (HIV)-1 protease | Dryopteris crassirhizoma | hopanoic acid | dryopteric acid B | Hopanoic acid | Dryopteric acid B | Dryopteric acid A | Human immunodeficiency virus (HIV)-1 protease
Journal Article
International Journal of Coal Geology, ISSN 0166-5162, 03/2013, Volume 107, pp. 90 - 95
Asphaltenes from coals of different rank were oxidised using ruthenium tetroxide with the aim of investigating the changes in bound biomarker distributions as... 
Hopanoids | Ruthenium tetroxide | Steroids | Microbial gas | HOPANOIC ACIDS | HYDROCARBONS | ENERGY & FUELS | PARAMETERS | STRUCTURAL FEATURES | TETROXIDE CATALYZED OXIDATION | GEOSCIENCES, MULTIDISCIPLINARY | CHEMICAL DEGRADATION | SHALE KEROGEN | GEOCHEMISTRY | CLOSED-SYSTEM PYROLYSIS | CARBOXYLIC-ACIDS | Biodegradation | Coal industry | Rankings | Biological markers | Isomerization
Journal Article
Cretaceous Research, ISSN 0195-6671, 07/2014, Volume 50, pp. 38 - 51
The Upper Cretaceous black shales of Egypt are part of the worldwide belt of Late Cretaceous organic-rich shales. Black shales are particularly prominent in... 
Black shales | Abu Tartur | Egypt | Biomarkers | Campanian–Maastrichtian | Rock-Eval | Mineral composition | Rock-eval | Campanian-maastrichtian | Abu tartur | HOPANOIC ACIDS | CLAY-MINERALS | CARBON | HYDROCARBONS | SEDIMENTS | ORGANIC-MATTER | ORIGIN | PALEONTOLOGY | GEOLOGY | INDICATORS | ISOTOPIC COMPOSITIONS | Campanian-Maastrichtian | Shale | Carbonates | Catalysis | Shale oils | Bituminous materials | Organic acids | Ore deposits
Journal Article
Marine and Petroleum Geology, ISSN 0264-8172, 09/2017, Volume 86, pp. 771 - 786
The Cretaceous-Palaeogene sequence of Egypt is a part of a giant belt of organic-rich deposits in North Africa and the Middle East. The present work focuses on... 
Quseir | Egypt | Trace metals | Biomarkers | Cretaceous-Palaeogene | Black shale | Rock-Eval | HOPANOIC ACIDS | OIL-SHALE | CERIUM ANOMALIES | SEA-LEVEL CHANGES | SULFUR BACTERIA | WESTERN DESERT | GEOSCIENCES, MULTIDISCIPLINARY | SOURCE ROCKS | BIOLOGICAL MARKERS | BLACK SHALES | BASIN | Environmental aspects | Mass extinction theory | Proxy | Shale oils | Terrigenous sediments
Journal Article
Marine and Petroleum Geology, ISSN 0264-8172, 03/2014, Volume 51, pp. 167 - 183
Sixty crude oils from the Termit Basin (Eastern Niger) were analysed using biomarker distributions and bulk stable carbon isotopic compositions. Comprehensive... 
Oil family | Biomarkers | West African | Termit Basin | GC–MS analysis | GC-MS analysis | HOPANOIC ACIDS | TRICYCLIC TERPANE SERIES | HYDROCARBONS | SEDIMENTS | DEPOSITIONAL ENVIRONMENT | CRUDE OILS | MATURITY PARAMETERS | DISTRIBUTIONS | GEOSCIENCES, MULTIDISCIPLINARY | SOURCE ROCKS | RIFT BASINS | Marine | Crude oil | Oil wells | Basins | Petroleum engineering | Geochemistry | Signatures | Deposition
Journal Article
Energy & Fuels, ISSN 0887-0624, 08/2014, Volume 28, Issue 8, pp. 4877 - 4888
The Posidonia Shale in the Hils syncline in North-West Germany represents a natural maturity sequence from 0.48 to 1.45% vitrinite reflectance (R 0). In this... 
DISTILLATION FRACTIONS | HOPANOIC ACIDS | ENGINEERING, CHEMICAL | NSO COMPOUNDS | SOURCE ROCKS | FT-ICR MS | ENERGY & FUELS | NITROGEN-COMPOUNDS | HILS SYNCLINE | CARBAZOLE DISTRIBUTIONS | SEA CRUDE OILS | HEAVY PETROLEUM
Journal Article
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences, ISSN 1000-2383, 09/2013, Volume 38, Issue 5, pp. 1014 - 1022
The lipid biomarkers of hopanoid acids in cold seep carbonates from the South China Sea continental slope are investigated. In the hopanoid acids, 17 beta (H),... 
Geochemistry | Jiulong methane reef | Hopanoic acids | Microorganisms | Methanotrophy | Seep carbonates
Journal Article
Organic Geochemistry, ISSN 0146-6380, 01/2020, Volume 139, p. 103940
•δ13C composition of cyclic terpenoids of M. kenyense and M. alcaliphilum is reported.•Average Δδ13Cterpenoid-methane is −25‰ for M. kenyense and −16‰ for M.... 
Stable carbon isotopes | Cyclic terpenoids | Tetrahymanol | Aerobic methanotrophic bacteria | Bacteriohopanepolyols | Methane seeps | Methylomicrobium | Hopanoids | Steroids | LIPID BIOMARKER | HOPANOIC ACIDS | CONVERGENT MARGIN | SIGNATURES | SEDIMENTS | GEOCHEMISTRY & GEOPHYSICS | METHYLOCOCCUS-CAPSULATUS | ANAEROBIC OXIDATION | MICROBIAL COMMUNITIES | MOSBY MUD VOLCANO | COLD SEEPS
Journal Article
Organic Geochemistry, ISSN 0146-6380, 2002, Volume 33, Issue 12, pp. 1515 - 1521
The distributions of hopanoic acids, ranging from C to C , in the Messel oil shale were characterized in both the free and bound states. The bound acids were... 
HOPANOIC ACIDS | BIOMARKERS | GEOCHEMISTRY & GEOPHYSICS | MARACAIBO BASIN | MOLECULAR FOSSILS | KEROGEN | INDICATORS | CHEMICAL DEGRADATION | PARAMETERS | MESSEL OIL-SHALE | CARBOXYLIC-ACIDS | Pyrolysis | Shale oils | Analysis | Isomerization | Oil-shales | Hydroxides
Journal Article
Organic Geochemistry, ISSN 0146-6380, 1999, Volume 30, Issue 12, pp. 1509 - 1516
The formation or generation of hopanes are important processes during both the natural heating of organic-rich sediments and laboratory pyrolysis experiments.... 
Hopanoic acids | Thermal maturation | Contact metamorphism | Hopanes | Decarboxylation | hopanoic acids | decarboxylation | KEROGEN | thermal maturation | contact metamorphism | SULFUR | RELEASE | MATURATION | hopanes | PROKARYOTIC TRITERPENOIDS | GEOCHEMISTRY & GEOPHYSICS | METHYLOCOCCUS-CAPSULATUS | MARACAIBO BASIN | ANCIENT SEDIMENTS | 3-BETA-METHYLHOPANOIDS | CARBOXYLIC-ACIDS
Journal Article
Organic Geochemistry, ISSN 0146-6380, 1990, Volume 16, Issue 1, pp. 211 - 218
Cyclic and acyclic carboxylic acids in various rock samples from the Misoa and La Luna formations, Maracaibo Basin, Western Venezuela, were analyzed in order... 
generation and maturation (of carboxylic acids) | carboxylic acids | Maracaibo Basin | hopanoic acid stereochemistry | GEOCHEMISTRY & GEOPHYSICS | MARACAIBO BASIN | KEROGEN | INDICATORS | HOPANOIC ACID STEREOCHEMISTRY | GENERATION AND MATURATION (OF CARBOXYLIC ACIDS) | OIL MIGRATION | CARBOXYLIC ACIDS
Journal Article