Results 111 to 120 of about 264,999 (349)

Intercomparison of carbon‐13 and carbon‐14 tracer approaches for estimating marine calcification and net primary production

Limnology and Oceanography: Methods, EarlyView.
Abstract Accurate measurements of phytoplankton net primary production (NPP) and calcification are essential for quantifying marine carbon cycling, yet in situ calcification rates remain poorly constrained. We compared 13C‐ and 14C‐based tracer methods for NPP in laboratory cultures of the diatom Chaetoceros tenuissimus and the coccolithophore ...
Chloe L. Smith, Austin Grubb, Kay D. Bidle, Kimberlee Thamatrakoln, Adam V. Subhas   +4 more
wiley   +1 more source

Corrosion of Potential Canister Materials During Oxic to Anoxic Transient in Compacted Bentonite

Materials and Corrosion, EarlyView.
A comprehensive analytical approach was applied to investigate material degradation phenomena of cast iron and copper as potential canister materials for the safe disposal of high‐level radioactive waste, as well as compacted bentonite exposed to artificial water relevant for disposal. ABSTRACT The long‐term performance of the engineered barrier system
Louisa Panjiyar, Martin Ende, Nicolas Finck, Christiane Stephan‐Scherb   +3 more
wiley   +1 more source

Analysis of the Impact of Building Pile Foundations and Support Systems on the Deformation of Special-Shaped Deep Excavations

Advances in Civil Engineering
This study focuses on the impact of building pile foundations on the excavation of irregular deep excavations, aiming to reveal their stress characteristics and deformation behavior to optimize design and construction processes.
Wenfeng Liu, Zhen Yang, Yaohui Zhao, Guangbiao Shao, Jianyong Han, Wanpeng Li, Jie Mao, Hongxing Zhao, Junwei Xue, Zhenguo Li, Tianliang Li   +10 more
doaj   +1 more source

GEOCHEMICAL STUDY OF SERICITE MINERALS OCCURED WITHIN THE SANGKAROPI AND RUMANGA COPPER DEPOSITS, SOUTH SULAWESI

, 2012
ABSTRAK\ud \ud \ud \ud ULVA RIA IRVAN. Studi Geokimia Mineral Serisit pada Endapan Tembaga Sangkaropi dan Rumanga Sulawesi Selatan (dibimbing oleh H. M. Sjahrul, Arifudin Idrus dan H. Abd. Wahid Wahab)\ud \ud Penelitian bertujuan untuk (1) mengetahui
Irfan, Ulva Ria
core  

Enviromental geochemestry study to define baseline (background) values of toxic elements in an high-urbanized and industrialized area (Comune di Casoria) [PDF]

, 2010
Following study presents the results of the analysis on top soils, soil profiles and tap water collected in Casoria municipal area, located at north of city of Naples (Italy).
Civitillo, Diego
core  

Mass Spectrometry in Authentication and Forensic Approaches for Determining the Origin of Hazardous Chemicals

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Identification of a chemical agent yields insights into its physicochemical properties. By examining the intrinsic characteristics and environment of a compound, information about its history can be gathered. The main objective of authentication/forensic approaches to chemicals is to trace the history of the compound's origin, regardless of ...
Carla Orlandi, Grégoire Delaporte, Christine Albaret, Emmanuel Joubert, Anne Bossée, Emilien L. Jamin, Laurent Debrauwer   +6 more
wiley   +1 more source

An Elasto–Plastic Hydro–Mechanical Model for Analyzing the Swelling Behavior of Heterogeneous Clay–Sulfate Rocks

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Swelling of clay‐sulfate rocks is a concern in geotechnical engineering that can damage infrastructure. In the historic town of Staufen in southwest Germany, geothermal drilling into a swellable anhydrite‐bearing clay formation resulted in water inflow and subsequent swelling, triggering ground heave and damage to more than 250 houses.
Reza Mahmoudi Kouhi, Reza Taherdangkoo, Thomas Nagel, Faramarz Doulati Ardejani, Christoph Butscher   +4 more
wiley   +1 more source

THE HISTORY, PROGRESS, AND FUTURE OF GLOBAL-SCALE GEOCHEMICAL MAPPING

Geochimica Brasiliensis, 2018
Global-scale, or continental-scale, geochemical surveys cover millions of square kilometers of the Earth’s surface generally at a very low sample density (1 site per 1,000 to 10,000 km2).
David B. Smith, Alecos Demetriades, Patrice de Caritat, Xueqiu Wang   +3 more
doaj   +1 more source

Hydro‐Mechanical Modelling of Gas Migration in Bentonite: Formulation and Laboratory‐Scale Validation

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Gas generation and migration in bentonite buffer materials are critical processes affecting the performance of deep geological repositories for radioactive waste. This study presents a new hydro‐mechanical formulation for simulating gas migration in saturated, compacted bentonite, with particular emphasis on the role of non‐uniform stress ...
Desmond Talamwin Sunkpal, Mamadou Fall
wiley   +1 more source

Hunting Strategies and Game Exploitation Organization in the Magdalenian: An Integrated Approach Based on Mortality Profiles and Stable Isotopes at Chaves Cave (Huesca, Spain)

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Understanding hunting strategies in Upper Paleolithic contexts remains challenging due to the complex relationships between prey behavior, environmental conditions, and human decision‐making. Addressing these dynamics requires integrating archeozoological, geospatial, and geochemical proxies capable of capturing demographic patterns, landscape
Alejandro Sierra, Marie Balasse, Luis Jiménez, Rafael Domingo, Lourdes Montes, Denis Fiorillo, Pilar Utrilla   +6 more
wiley   +1 more source