Results 31 to 40 of about 2,145,643 (244)

Peatlands and the carbon cycle: from local processes to global implications - a synthesis [PDF]

, 2008
Peatlands cover only 3% of the Earth's land surface but boreal and subarctic peatlands store about 15-30% of the world's soil carbon ( C) as peat. Despite their potential for large positive feedbacks to the climate system through sequestration and ...
Berendse, F., Blodau, C., Canadell, J.G., Freeman, C., Holden, J., Limpens, J., Roulet, N., Rydin, H., Schaepman-Strub, G.   +8 more
core   +4 more sources

The Carbonate Platform Model and Reservoirs’ Origins of the Callovian-Oxfordian Stage in the Amu Darya Basin, Turkmenistan

Crystals, 2018
The Calloviane-Oxfordian carbonates in the northeastern Amu Darya Basin of southeastern Turkmenistan are composed of medium- to thick-bedded, mostly grainy limestones with various skeletal (bivalves, brachiopods, echinoderms, foraminifera, corals, and ...
Wenli Xu, Huaguo Wen, Rongcai Zheng, Fengjie Li, Fei Huo, Mingcai Hou, Gang Zhou   +6 more
doaj   +1 more source

Independent elaboration of steroid hormone signaling pathways in Metazoans [PDF]

, 2009
Steroid hormones regulate many physiological processes in vertebrates, nematodes and arthropods through binding to nuclear receptors (NR), a metazoan-specific family of ligand-activated transcription factors.
Gabriel V. Markov, Raquel Tavares, Chantal Dauphin-Villemant, Barbara A. Demeneix, Michael E. Baker, Vincent Laudet   +5 more
core   +3 more sources

Accumulation condition for Wufeng-Longmaxi Formation shale gas of Yanjin-Gongxian area

工程科学学报, 2016
The formation conditions of shale gas in Wufeng-Longmaxi Formation of Yanjin-Gongxian area were analyzed on the basis of field observation and experimental data,and then the main factors for shale gas accumulation were discussed.
LIANG Ping-ping, WANG Hong-yan, ZHAO Qun, ZHANG Qin, WANG Nan, XIAO Qian-hua   +5 more
doaj   +1 more source

Characteristics, Main Controlling Factors and Prediction of Complex Fracture–Cavity Reservoirs of Buried Carbonate Hills in the Weixinan Depression, Western South China Sea

Frontiers in Earth Science, 2022
Buried hill oil reservoirs have become a key area for offshore oil and gas exploration. In this paper, a typical oil field in the western South China Sea is used as the research object, and a study on the characterization, cause of formation and ...
Chong Zhang, Chong Zhang, Wen Zhou, Chang Liu, Xinguang Wang, Hao Xu   +5 more
doaj   +1 more source

Growth, History, or Institutions? What Explains State Fragility in Sub-Saharan Africa [PDF]

We explore the determinants of state fragility in sub-Saharan Africa. Controlling for a wide range of economic, demographic, geographic and istitutional regressors, we find that institutions, and in particular the civil liberties index and the number of ...
Andrea Guerzoni, Graziella Bertocchi
core   +6 more sources

The geological controlling factors of the heterogeneity of a bioclastic limestone reservoir—a case study of the Cretaceous Kh2 layer in A oilfield, Iraq

Frontiers in Energy Research
Reservoir heterogeneity is one of the key factors affecting the exploration and development of oil and gas reservoirs. The Kh2 layer in the A field of Central Iraq is a major pay zone with strong longitudinal and lateral heterogeneity. The heterogeneity,
Can Ling, Xiran Zhang, Meiyan Fu, Meiyan Fu, Tingting Huang, Guanghui Duan, Shumin Gao   +6 more
doaj   +1 more source

Determination of Various Forms of Iron and Manganese Oxides and the Main Controlling Factors of Absorption of Sb(Ⅲ) in Soil

Yankuang ceshi, 2023
BACKGROUND It is of great significance for evaluation, early warning and remediation of antimony contaminated soil to study the sorption factors affecting Sb(Ⅲ) adsorption in soil.
CUI Ting, YE Xin, ZHU Xiaping, LI Junya, XU Huan   +4 more
doaj   +1 more source

Analysis of the main controlling factors of weathering rates in Yungang Grottoes sandstones

Zhongguo dizhi zaihai yu fangzhi xuebao
Analyzing the weathering rates and their main environmental controlling factors is fundamental in conserving rocky relics. In this study, using the sandstones of the Yungang Grottoes as a case study, the rock weathering rates were quantitatively ...
Nan SUO, Jinming XU, Baoming LU
doaj   +1 more source

Differential Reservoir-Forming Mechanisms of the Lower Paleozoic Wufeng-Longmaxi and Niutitang Marine Gas Shales in Northern Guizhou Province, SW China: Theories and Models

Energies, 2022
Fine dissection of microscopic pore structure variations between the Niutitang Formation and the Wufeng-Longmaxi Formation will help to improve the understanding of the underlying geological theory of shale gas in northern Guizhou Province.
Wei Du, Wei Yang, Xingyu Li, Fulun Shi, Ruiqin Lin, Yisong Wang, Daquan Zhang, Yi Chen, Zhao Sun, Fuping Zhao   +9 more
doaj   +1 more source