Results 11 to 20 of about 23,351 (246)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+9 more sources

URANIUM OXYNITRIDE AND URANIUM DIOXIDE. [PDF]

open access: yesJournal of the American Chemical Society, 1895
n ...
Smith, Edgar F., Matthews, J. Merritt
openaire   +1 more source

Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals

open access: yesHe jishu, 2022
BackgroundThe main ore-bearing rock of the Husab Uranium Mine in Namibia, southern Africa, is white granite, and the radioactive element thorium content in the ore is high, which has a greater impact on the γ ray logging results.PurposeThis study aims to
HAO Jinlong   +3 more
doaj   +1 more source

Study on Influence Factors for Determination of Oxygen Isotopic Composition of Silicates and Oxide Minerals by BrF5 Method

open access: yesYankuang ceshi, 2019
BACKGROUND Reagent purification, sample pretreatment, environmental humidity, reactor cleanliness and experimental quality control are the main influence factors for determination of oxygen isotopic composition of silicates and oxide minerals by BrF5 ...
ZHANG Jian-feng   +8 more
doaj   +1 more source

Uranium Isotope Exchange between Uranium Hexafluoride and Uranium Pentafluoride

open access: yesJournal of Nuclear Science and Technology, 1995
To aim at a better understanding of the uranium isotope exchange reaction between gaseous UF6 and solid UF5 experiments were done with natural UF6 gas and solid UF5 containing 3% 235U under different pressures of UF6. The experimental results suggest a two-process reaction with an initial rapid increase of 235UF6 in the gas phase followed by its slight
YATO, Yumio   +2 more
openaire   +1 more source

Effect of process parameters on the recovery of thorium tetrafluoride prepared by hydrofluorination of thorium oxide, and their optimization

open access: yesNuclear Engineering and Technology, 2022
Liquid fueled molten salt reactors (MSRs) have seen renewed interest because of their inherent safety features, higher thermal efficiency and potential for efficient thorium utilisation for power generation.
Raj Kumar   +4 more
doaj   +1 more source

Determination of Oxygen Isotopic Composition in Barium Sulfate by Online Pyrolysis Method with Nickel-plated Carbon as Reductant

open access: yesYankuang ceshi, 2019
BACKGROUND The oxygen isotopic composition of sulfate radical in mineral or water can be used to identify the source and transformation process. At present, the common method is to convert sulfate radical into barium sulfate and the oxygen isotopic ...
JIN Gui-shan   +6 more
doaj   +1 more source

About chemical form and binding energy of 14C in irradiated graphite of uranium-graphite nuclear reactors [PDF]

open access: yesNuclear Energy and Technology, 2018
Issues associated with handling irradiated graphite of uranium-graphite nuclear reactors are examined. It is demonstrated that selection of approaches, methods and means for handling irradiated graphite are determined by the form of occurrence and ...
Evgeny V. Bespala   +3 more
doaj   +3 more sources

Design and validation of the THMC China-Mock-Up test on buffer material for HLW disposal

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2014
According to the preliminary concept of the high-level radioactive waste (HLW) repository in China, a large-scale mock-up facility, named China-Mock-Up was constructed in the laboratory of Beijing Research Institute of Uranium Geology (BRIUG).
Yuemiao Liu   +7 more
doaj   +1 more source

The neurotoxicology of uranium [PDF]

open access: yesToxicology, 2015
The brain is a target of environmental toxic pollutants that impair cerebral functions. Uranium is present in the environment as a result of natural deposits and release by human applications. The first part of this review describes the passage of uranium into the brain, and its effects on neurological functions and cognitive abilities.
Céline, Dinocourt   +3 more
openaire   +2 more sources

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