Results 51 to 60 of about 65,019 (260)
Analysis of Coal Cores Using Micro-XRF Scanning Techniques
, 2015 This chapter explores the application of micro-XRF scanning to the inorganic geochemical analysis of drill cores obtained from coal exploration programs. It describes the development and use of a calibration to obtain detailed quantitative profiles of major inorganic elements through cores of bituminous coal seams, and hence allow rapid evaluation of ...
Kelloway, SJ +4 more
openaire +2 more sources
X-ray Fluorescence Core Scanning for High-Resolution Geochemical Characterisation of Soils
Soil SystemsX-ray fluorescence (XRF) core scanners are commonly used for fine-scale geochemical analysis in sediment studies, but data are semi-quantitative and require calibration to convert geochemical element counts to concentrations.
Shayan Kabiri +4 more
doaj +1 more source
Dissolution kinetics of South African coal fly ash and the development of a semi-empirical model to predict dissolution [PDF]
Chemical Industry and Chemical Engineering Quarterly, 2015 Wet flue gas desulphurization (FGD) is a crucial technology which can be used to abate the emission of sulphur dioxide in coal power plants. The dissolution of coal fly ash in adipic acid is investigated by varying acid concentration (0.05-0.15M)
Koech Lawrence +3 more
doaj +1 more source
Orbitally tuned timescale and astronomical forcing in the middle Eocene to early Oligocene [PDF]
, 2014 Deciphering the driving mechanisms of Earth system processes, including the climate dynamics expressed as paleoceanographic events, requires a complete, continuous, and high-resolution stratigraphy that is very accurately dated.
G. Acton +5 more
core +1 more source
Geofluids, 2022 The genesis of dolostone has long been puzzling for more than two centuries. Although much work has been done on investigating the process of dolomitization, little emphasis has been put on examining the diagenetic water redox condition with the wealthy ...
Yuke Liu +11 more
doaj +1 more source
Rapid environmental changes in the Lake Qinghai basin during the late Holocene
Frontiers in Earth Science, 2023 The Lake Qinghai Basin is sensitive to global and regional climate change because of its unique geographical location. It is the hotspot for paleoclimate research in East Asia.
Chen Wang +9 more
doaj +1 more source
Laser Ablation Sampling With Low-Power Plasma: A LA-MIP-MS Instrument for Spaceflight. [PDF]
Rapid Commun Mass SpectromABSTRACT Rationale Inductively coupled plasma (ICP) is a commonly used ion source for mass spectrometry‐based chemical analysis of a wide range of materials. Traditional ICP ion sources use high power (> 1000 W) and significant gas flow (> 10 L/min), rendering them unsuitable for spaceflight, as they are too resource‐intensive for planetary spacecraft.
Farcy BJ +11 more
europepmc +2 more sources
Probing the Protosolar Disk Using Dust Filtering at Gaps in the Early Solar System
, 2019 Jupiter and Saturn formed early, before the gas disk dispersed. The presence of gap-opening planets affects the dynamics of the gas and embedded solids and halts the inward drift of grains above a certain size.
Benítez-Llambay, Pablo +6 more
core +1 more source
Advanced Functional Materials, EarlyView.[001]‐oriented Sb2Se3 film with improved crystallinity and adjusted composition is achieved via a new thermal treatment approach consisting of preliminary annealing of the Sb layer before its selenization. The findings of this work demonstrate enhanced charge carriers' transportation, a stable performance, and an improvement of H2 generation from ...
Magno B. Costa +7 more
wiley +1 more source
Microstructure and chemical composition of Roman orichalcum coins emitted after the monetary reform of Augustus (23 B.C.) [PDF]
, 2019 A collection of ancient Roman orichalcum coins, i.e., a copper-zinc alloy, minted under the reigns from Caesar to Domitianus, have been characterised using scanning electron microscopy (SEM-EDS) and electron microprobe analysis (EMPA).
Catalli F. +3 more
core +1 more source