Results 41 to 50 of about 1,885,987 (306)

Tissue-Specific Distribution of Legacy and Emerging Organophosphorus Flame Retardants and Plasticizers in Frogs

Toxics, 2021
Five types of tissues, including the liver, kidney, intestine, lung, and heart, were collected from black-spotted frogs and bullfrogs to study the tissue-specific accumulation of organophosphorus flame retardants (PFRs) and plasticizers.
Yin-E Liu, Xiao-Jun Luo, Ke-Lan Guan, Chen-Chen Huang, Xue-Meng Qi, Yan-Hong Zeng, Bi-Xian Mai   +6 more
doaj   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

Sedimentary facies controlled biogeochemical process of biotic extinction and turnover across the Cambrian SPICE event

Communications Earth & Environment
The Steptoean positive carbon isotope excursion (SPICE) event, one of the largest carbon cycle perturbations in the Cambrian, coincides with shallow-shelf-fauna extinction and plankton revolution (critical transition of plankton).
Haozhe Wang, Haizu Zhang, Yiman Zhang, Bin Cheng, Qian Deng, Donghui Wang, Guanyu Zhao, Zewen Liao   +7 more
doaj   +1 more source

Identification of animal fats via compound specific δ13C values of individual fatty acids: assessments of results for reference fats and lipid extracts of archaeological pottery vessels

Documenta Praehistorica, 2002
The possibility of obtaining molecular information from lipid residues associated with archaeological pottery has dramatically increased the potential for deriving new information on the use of ancient vessels and the commodities processed therein ...
Richard P. Evershed, Stephanie N. Dudd, Mark S. Copley, Anna Mutherjee   +3 more
doaj   +1 more source

Corrigendum to “Branched GDGT signals in fluvial sediments of the Danube River basin: Method comparison and longitudinal evolution” [Organic Geochem. 103 (2017) 88–96] (S0146638016303151) (10.1016/j.orggeochem.2016.11.002) [PDF]

, 2017
In the above article, an incorrect figure (Fig. 3) was published. This issue is rectified here with the correct Fig. 3.
Peterse, Francien, Filip, Florin, Organic geochemistry & molecular biogeology, Giosan, Liviu, Freymond, Chantal V., Organic geochemistry, Fischer, Lorena V., Eglinton, Timothy I.   +7 more
core   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Genetic mechanism of bicyclic sesquiterpanes in Upper Triassic source rock of Yinan 2 well from the Kuqa Depression of Tarim Basin, China

Scientific Reports
Bicyclic sesquiterpanes are widely distributed in terrigenous sedimentary organic matter and are serve as valuable biomarker in the field of organic geochemistry.
Yiman Zhang, Haizu Zhang, Hanyu Deng, Liangliang Wu, Bin Cheng, Yunpeng Wang, Zewen Liao   +6 more
doaj   +1 more source

Sources and sinks of branched tetraether lipids and bacteriohopanepolyols in a major river system (Yenisei River – Kara Sea: Implications for their application as geochemical tracers [PDF]

, 2015
Understanding and predicting climate variability is a major scientific challenge, especiallyas climate-induced environmental change will impact on human society.
Organic geochemistry & molecular biogeology, Organic geochemistry, de Jonge, C.   +2 more
core   +2 more sources

Distribution of bacterial and archaeal ether lipids in soils and surface sediments of Tibetan lakes: Implications for GDGT-based proxies in saline high mountain lakes [PDF]

, 2014
Bacterial and archaeal lipids, such as glycerol dialkyl glycerol tetraethers (GDGTs) and dialkyl glycerol diethers, are increasingly used as proxies for specific environmental parameters, such as air temperature and soil pH in lacustrine environments ...
Xu, B., Günther, F., Yao, T., Organic geochemistry & molecular biogeology, Schouten, S., Organic geochemistry, Thiele, A., Gleixner, G., Xu, B.Q.   +8 more
core   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source