Results 61 to 70 of about 182,068 (317)

Polygonal tepee structures of Arabia

The Depositional Record, EarlyView.
Tepee structures on Sheybarah Island form polygonal microbial cemented crusts in the intertidal. Radiocarbon dating suggests they formed in the Holocene and reflect minor sea‐level changes, highlighting their value as palaeoenvironmental indicators. Satellite surveys identified 126 polygonal features, including coral reefs that may have developed on ...
Pauline Falkenberg, Sarima Vahrenkamp, Elisa Garugleri, Alexander Petrovic, Kai Hachmann, Viswasanthi Chandra, Volker C. Vahrenkamp   +6 more
wiley   +1 more source

Rapid Identification of New Psychoactive Substances in Letters by LA‐APCI‐MS

Drug Testing and Analysis, EarlyView.
Laser ablation coupled to molecular mass spectrometry utilizing a modified atmospheric pressure chemical ionization source was used for the detection of synthetic cannabinoid receptor agonists in infused prison mail samples. ABSTRACT New psychoactive substances (NPS), especially synthetic cannabinoid receptor agonists (SCRA), are increasingly smuggled ...
Mark Wesner, Hannah Rämisch, Laura Besch, Johannes Schmeinck, Uwe Karst   +4 more
wiley   +1 more source

Vadose zone air as a biogenic source of methane in Nerja Cave system (South of Spain) [PDF]

, 2018
Subterranean air in karst cavities has often low methane contents in comparison to atmosphere and so karst systems have been considered a sink of atmospheric methane. Methane-oxidizing bacteria have been hypothesized as responsible for CH4 depletion in
Benavente, José, Carrasco-Cantos, Francisco, Del Rosal, Yolanda, Etiope, Giuseppe, Liñán-Baena, Cristina, Moriñigo-Gutierrez, Miguel Angel, Ojeda, Lucía, Tapia, Silvana, Vadillo-Perez, Iñaki   +8 more
core  

Karsts

, 2012
Collection edytem n°13 ; Les Gorges de l’Ardèche. Quelle pouvait être l’impression d’un Homme parcourant celles-ci il y a plus de 30 000ans ? Quel regard portait-il sur ces versants abrupts, ces roches calcaires aux formes spectaculaires et ses nombreuxporches et autres abris sous roche ?
Delannoy, Jean-Jacques, Jaillet, Stéphane, Sadier, Benjamin   +2 more
openaire   +1 more source

Simulation of the Metabolism of New Psychoactive Substances Using Electrochemistry‐Mass Spectrometry: Introducing an Innovative Software Tool for Rapid Data Evaluation

Drug Testing and Analysis, EarlyView.
A novel software tool for the rapid and efficient simulation of the metabolism of new psychoactive substances was developed and applied to mimic the metabolism of the synthetic cannabinoid receptor agonist MDMB‐4en‐PINACA. ABSTRACT An innovative software tool for the rapid and efficient simulation of the metabolism of new psychoactive substances (NPS ...
Mark Wesner, Steffen Heuckeroth, Michael Pütz, Uwe Karst   +3 more
wiley   +1 more source

Directional Deep Brain Stimulation for Parkinson's Disease: Results of an International Crossover Study With Randomized, Double‐Blind Primary Endpoint

Neuromodulation: Technology at the Neural Interface, EarlyView., 2021
Abstract Objective Published reports on directional deep brain stimulation (DBS) have been limited to small, single‐center investigations. Therapeutic window (TW) is used to describe the range of stimulation amplitudes achieving symptom relief without side effects.
Alfons Schnitzler, Pablo Mir, Matthew A. Brodsky, Leonard Verhagen, Sergiu Groppa, Ramiro Alvarez, Andrew Evans, Marta Blazquez, Sean Nagel, Julie G. Pilitsis, Monika Pötter‐Nerger, Winona Tse, Leonardo Almeida, Nestor Tomycz, Joohi Jimenez‐Shahed, Witold Libionka, Fatima Carrillo, Christian J. Hartmann, Stefan Jun Groiss, Martin Glaser, Florence Defresne, Edward Karst, Binith Cheeran, Jan Vesper, for the PROGRESS Study Investigators   +24 more
wiley   +1 more source

Evolution Mechanism of Water-Conducting Fissures in Overlying Rock Strata with Karst Caves under the Influence of Coal Mining [PDF]

, 2022
Wenqiang Wang, Zhenhua Li, Jie Xu, Yue Wang, Fan Xuan, Songtao Li   +5 more
openalex   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Random finite element analysis on ground subsidence caused by tunnel excavation in karst regions with spatial variable soil

Deep Underground Science and Engineering, EarlyView.
This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su, Yong Fu, Miaomiao Sun, Kailin Ding, Ying Zhao   +4 more
wiley   +1 more source

Hydrogeological conditions of karst leakage and locating of leakage channels in Biyun lake, Guizhou

Carsologica Sinica
China is a country with the widest distribution area and the most complete karst development type in the world, and its karst area accounts for about one third of China's territorial area.
Jie ZENG, Xiaodong PAN, Kun REN, Wei LIU, Cong PENG, Zhijie ZHENG   +5 more
doaj   +1 more source