Results 121 to 130 of about 29,406 (231)
Red to Green: A Lipid Biomarker Record of Tonian‐Ediacaran Algae in Siberia
Geobiology, Volume 24, Issue 5, September/October 2026.ABSTRACT Multiple lines of evidence point to a major diversification of Eukarya in the late Tonian period, ca. 800–720 Ma ago. Regular steranes, lipid biomarkers primarily sourced from eukaryotes, are first unambiguously reported from multiple sites. Here, we present lipid biomarker stratigraphic records from two drill‐cores from the Lena‐Anabar Basin ...
Adriana I. Rizzo +7 more
wiley +1 more source
The role of gas bubbles in bitumen recovery from tar sands in hot-water processing
, 1994 Complete bitumen disengagement and displacement from tar sand during digestion is a determining but not sufficient condition for satisfactory bitumen recovery in the hot water process.
Drelich, Jaroslaw; Lelinski, Dariusz; Hupka, Jan; Miller, Jan D.
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Development of a Mix Design Process for Cold-in-Place Rehabilitation Using Foamed Asphalt, December 2005 [PDF]
, 2005 Report by Iowa Department of Transportation about pavements ...
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Optimisation of the preparation procedure of crumb rubber modified bitumen with wax-based additives [PDF]
Wax-based additives can be added to crumb rubber modified bitumen (CRMB) at different stages to enhance the workability. This study aims to optimize the preparation procedure by investigating the effects of the preparation procedure on the rheological ...
Lu, Guoyang +3 more
core +1 more source
Classification of natural bitumen: A physical and chemical approach
, 1987 journal articleBy correlation of various selected physical and chemical properties of heavy crude oils and natural bitumens, an attempt is made to solve classification problems.
Cornelius, C. D.
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Bitumen deposits of northwest Alabama
, 1987 journal articleBituminous rocks of Mississippian age crop out in northwest Alabama within a 113-km (70-mi) long belt. Bitumen deposits have been confirmed by coreholes to be present in the subsurface for a distance of at least 16-24 km (10-15 mi) south ...
Wilson, G. V.
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Process for separating high viscosity bitumen from tar sands
, 1984 patentA novel process for separating high viscosity bitumen from tar sand. The process includes grinding the tar sand to obtain phase disengagement of the bitumen phase from the sand phase and thereafter using flotation techniques to obtain phase ...
Miller, Jan D.; Misra, Manoranjan
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Heavy-oil and bitumen projects in Madagascar
, 1987 journal articleMadagascar contains two important deposits, the Bemolanga tar sand and the Tsimiroro heavy crude oil. Although known for years, they have received intensive investigation recently in effort to achieve a measure of energy independence in ...
Andrianasolo-Ralaimiza, H.
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Microstructural Changes in Bitumen at the onset of Damage-healing [PDF]
, 2016 Self-healing of bitumen is a property that positively contributes to the sustainability, maintenance requirements and cost effectiveness of asphalt pavements. Ideally one would like to design an asphalt mix with a well-defined healing potential. Although
Kasbergen, C. (author) +4 more
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Process for upgrading tar sand bitumen
, 1989 patentA method for upgrading a concentrate of tar sands bitumen containing colloidal clay in which solvent-diluted bitumen is contacted for a short time in a riser with hot attrition-resistant substantially catalytically inert fluidizable microspheres ...
Bartholic, David B.; Reagan, William J.
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