Results 41 to 50 of about 4,569,253 (343)

TOC interpretation of lithofacies-based categorical regression model: A case study of the Yanchang formation shale in the Ordos basin, NW China

open access: yesFrontiers in Earth Science, 2023
In this paper, taking the shale of Chang 7-Chang 9 oil formation in Yanchang Formation in the southeastern Ordos Basin as an example, through the study of shale heterogeneity characteristics, starting from the preprocessing of supervision data set, a ...
Jintao Yin   +12 more
doaj   +1 more source

Cell aging preserves cellular immortality in the presence of lethal levels of damage. [PDF]

open access: yes, 2019
Cellular aging, a progressive functional decline driven by damage accumulation, often culminates in the mortality of a cell lineage. Certain lineages, however, are able to sustain long-lasting immortality, as prominently exemplified by stem cells.
Chao, Lin   +4 more
core   +3 more sources

Petroleum accumulation: from the continuous to discontinuous

open access: yesPetroleum Research, 2017
Based on the extensive studies of conventional and unconventional hydrocarbon accumulations, the concept, classification and formation as well as distribution of petroleum reservoirs are discussed. The revised concept defined the petroleum reservoir as a
Jingzhou Zhao   +6 more
doaj   +1 more source

Numerical Simulation Study of Pore-Throat Evolution of Upper Paleozoic in Ordos Basin, China

open access: yesGeofluids, 2021
The parameters of grain size, contents of silica, kaolinite, hydromica, calcite, and a geological time of tight sandstone reservoirs in Upper Paleozoic in Ordos basin were researched thoroughly, and the impact of the diagenetic evolution process of ...
Qing Cao   +5 more
doaj   +1 more source

Heavy metals in carabids (Coleoptera, Carabidae) [PDF]

open access: yes, 2011
Carabid beetles (Coleoptera, Carabidae) are one of the most studied soil groups in relation to heavy metal (HM) accumulation and use for bioindication of environmental pollution. Accumulation of Zn and Cu in carabid beetles was species-, sex- and trophic
Butovsky, Ruslan
core   +2 more sources

Siliceous and calcareous sources in marine high-quality hydrocarbon source rocks: skeleton-wall-shell of organism and their debris

open access: yesShiyou shiyan dizhi
Using techniques such as ultra-microscopic organic petrology, the study explores the relationship between bioclasts such as siliceous and calcareous skeleton-wall-shell organism and high-quality hydrocarbon source rocks in terms of their biomolecular ...
Longfei LU   +5 more
doaj   +1 more source

Influences of spin accumulation on the intrinsic spin Hall effect in two dimensional electron gases with Rashba spin-orbit coupling [PDF]

open access: yes, 2004
In a two dimensional electron gas with Rashba spin-orbit coupling, the external electric field may cause a spin Hall current in the direction perpendicular to the electric field. This effect was called the intrinsic spin Hall effect.
E. I. Rashba   +4 more
core   +2 more sources

A monoclonal antibody recognizing very late activation antigen-4 inhibits eosinophil accumulation in vivo. [PDF]

open access: yes, 1993
Using an in vivo test system, the role of the β1 integrin very late activation antigen-4 (VLA-4) in eosinophil accumulation in allergic and nonallergic inflammatory reactions was investigated.
Lobb, RR   +3 more
core   +1 more source

Pore types, genesis, and evolution model of lacustrine oil-prone shale: a case study of the Cretaceous Qingshankou Formation, Songliao Basin, NE China

open access: yesScientific Reports, 2022
A comprehensive characterisation of the pore structure in shale oil reservoirs is essential for forecasting oil production and exploration risks. This study forecasted these risks in the oil-rich Songliao Basin using combination of high-resolution field ...
Wenyuan He   +8 more
doaj   +1 more source

Characterization of Residual Oil Distribution in Sandstone by NMR: A Microscopic View on Oil Recovery by Miscible CO2 Flooding

open access: yesLithosphere, 2022
Miscible CO2 flooding gains rising popularity due to high displacement efficiency and potential carbon negativity. It is well documented that pore-level heterogeneity is one of the dominant mechanisms responsible for the variation in oil recovery ...
Anlun Wang   +9 more
doaj   +1 more source

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