Results 61 to 70 of about 1,885,987 (306)

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

Molecular characterization of dissolved organic matter (DOM) in seawater [PDF]

, 2000
Dissolved organic matter (DOM) plays an important role in the global carbon cycle (chapter 1). However, not much is known about the molecular composition and the origin of DOM. The study described in this thesis was conducted to gain more knowledge on
van Heemst, J.D.H., Organic geochemistry & molecular biogeology, Resistant Organic Matter (ROM), IVAU: Instituut voor Aardwetenschappen Utrecht, Geochemistry, Heemst, J.D.H. van   +5 more
core   +1 more source

Late Quaternary climate variability at Mfabeni peatland, eastern South Africa [PDF]

, 2019
The scarcity of continuous, terrestrial, palaeoenvironmental records in eastern South Africa leaves the evolution of late Quaternary climate and its driving mechanisms uncertain.
Hill, Trevor, Peterse, Francien, Organic geochemistry & molecular biogeology, Humphries, Marc, Schefuß, Enno, Miller, Charlotte, Organic geochemistry, Finch, Jemma, Zabel, Matthias   +8 more
core   +1 more source

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China [PDF]

Biogeosciences, 2017
Neutral monosaccharides, algal organic matter (AOM), and carbon stable isotope ratios in three sediment cores of various trophic reservoirs in South China were determined by high-performance anion-exchange chromatography, Rock-Eval pyrolysis, and ...
D. Duan, D. Duan, D. Zhang, D. Zhang, Y. Yang, J. Wang, J. Chen, Y. Ran   +7 more
doaj   +1 more source

Production and preservation of archaeal glycerol dibiphytanyl glycerol tetraethers as intact polar lipids in marine sediments: Implications for their use in microbial ecology and TEX86 paleothermometry [PDF]

, 2013
For climate modelling in order to predict climate change scenarios, it is important to consider past climate conditions and their impacts. The study of past climates, paleoclimatology, makes frequent use of molecular fossils, molecules that are preserved
Organic geochemistry & molecular biogeology, Lengger, S.K., Organic geochemistry   +2 more
core  

Organic matter characteristics in yedoma and thermokarst deposits on Baldwin Peninsula, west Alaska [PDF]

, 2018
As Arctic warming continues and permafrost thaws, more soil and sedimentary organic matter (OM) will be decomposed in northern high latitudes. Still, uncertainties remain in the quality of the OM and the size of the organic carbon (OC) pools stored in ...
Strauss, Jens, Peterse, Francien, Fuchs, Matthias, Organic geochemistry & molecular biogeology, Mangelsdorf, Kai, Jongejans, Loeka Laura (Dr. rer. nat.), Organic geochemistry, Grosse, Guido, Strauß, Jens (Dr.), Mangelsdorf, Kai (Dr.), Jongejans, Loeka L., Lenz, Josefine (Dr. rer. nat.), Lenz, Josefine, Fuchs, Matthias (Dr.), Grosse, Guido (Prof. Dr.)   +14 more
core   +2 more sources

World's fastest 10 000‐m breakthrough: The XY‐22 well redefines deep‐earth access in the Tarim Basin

Deep Underground Science and Engineering, EarlyView.
The Tarim Basin in northwestern China hosts one of the world's deepest petroleum systems, exemplified by the XY‐22 ultra‐deep well (bottom depth: 11 116 m; ~220°C, ~145 MPa). This study integrates tectonic mapping, geological cross‐sections, ultraviolet fluorescence microscopy, and optical photothermal infrared (OPTIR) spectroscopy to characterize ...
Qingwen Tan, Fangkai Liu, Sen Zhu, Guangyou Zhu, Haiping Huang   +4 more
wiley   +1 more source

Chemical and stable carbon isotopic composition of PM_2.5 from on-road vehicle emissions in the PRD region and implications for vehicle emission control policy [PDF]

Atmospheric Chemistry and Physics, 2015
Vehicle emissions are a major source of urban air pollution. In recent decade, the Chinese government has introduced a range of policies to reduce vehicle emissions.
S. Dai, X. Bi, L. Y. Chan, J. He, B. Wang, X. Wang, P. Peng, G. Sheng, J. Fu   +8 more
doaj   +1 more source

Paleoenvironmental reconstructions in the Baltic Sea and Iberian margin: Assessment of GDGTs and long-chain alkenones in Holocene sedimentary records [PDF]

, 2017
Increasing our knowledge about the global climate system will help society to mitigate anthropogenically induced global climate change and its impacts on the environment.
Organic geochemistry & molecular biogeology, Organic geochemistry, Warden, L.A.   +2 more
core   +1 more source