Results 91 to 100 of about 4,739 (258)

Eu isotope data of NIST3117a standard reagent for determination of Eu isotope fractionation in geological rocks using MC-ICP-MS. [PDF]

Data Brief, 2021
Lee SG, Tanaka T.
europepmc   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Binuclear Copper‐Dependent Oxidative Enzymes Involved in Fungal Natural Product Modifications

Journal of the Chinese Chemical Society, EarlyView.
This article summarizes recent biochemical characterizations of a new enzyme family named by the authors as binuclear copper‐dependent oxidative enzymes (BiNCOs). Found in fungal natural product biosynthesis, BiNCOs catalyze diverse CH functionalization reactions, including C(sp3)H halogenation, C(sp3)H hydroxylation, C(sp3)O macrocyclization, and ...
Chen‐Yu Chiang, Masao Ohashi, Yi Tang
wiley   +1 more source

Early Holocene Scandinavian foragers on a journey to affluence: Mesolithic fish exploitation, seasonal abundance and storage investigated through strontium isotope ratios by laser ablation (LA-MC-ICP-MS). [PDF]

PLoS One, 2021
Boethius A, Kjällquist M, Kielman-Schmitt M, Ahlström T, Larsson L.   +4 more
europepmc   +1 more source

The Top 1.2 m as a δ56Fe‐Sensitive Zone: Synergistic Regulation of Fe Cycling by Soil Texture and Land Use Intensity in Tropical Soils

Land Degradation &Development, EarlyView.
ABSTRACT Soil Fe cycling is co‐regulated by texture and land use intensity (LUI), but their synergistic mechanism and depth‐dependent effects remain unclear. We analyzed 68 samples (0–200 cm) from one cultivated (CL, high LUI, silty loam, clay = 11%–18%) and three non‐cultivated (AC1–AC3, low LUI, sandy loam, clay = 2.65%–9.00%) profiles in Thailand's ...
Qian Zhang, Guilin Han, Di Wang, Chao Song   +3 more
wiley   +1 more source

Determination of Magnesium Isotopic Composition of Plant Chlorophylls Based on HPLC and MC-ICP-MS

Yankuang ceshi
The accurate determination of magnesium isotope values of chlorophyll a and chlorophyll b is particularly important for the study of magnesium biosynthesis pathways during chlorophyll formation. HPLC is required before MC-ICP-MS can be utilized, but HPLC
Zihan AN, Hongyu ZHANG, Jiaxin YIN, Pan ZHANG, Min YAO, Kangjun HUANG   +5 more
doaj   +1 more source

Serum elemental profile‐based machine learning models for Alzheimer's disease identification and cognitive score prediction

Neuroprotection, EarlyView.
Serum elemental profiling combined with machine learning supports exploratory Alzheimer's disease (AD) identification and cognitive score prediction. In this retrospective cross‐sectional study, 874 participants from the BANC‐PUMC, including cognitively normal controls and patients with AD, were analyzed.
Haotian Liu, Xinnan Liu, Yashuang Chen, Meng Pan, Ying Fu, Chao Ma, Wei Ge   +6 more
wiley   +1 more source

A Study on Memory Effects in Lithium and Boron Isotope Analysis Using MC-ICP-MS

Yankuang ceshi
Lithium (Li) and boron (B) isotopes are excellent tracers in geological processes. In order to study and eliminate the memory effects of lithium and boron element in isotopic measurements using MC-ICP-MS, different background rinsing protocols were ...
Qingyu TANG, Lu CHEN, Shihong TIAN, Wenjie HU, Yingli GONG, Yanmei ZI   +5 more
doaj   +1 more source

Sepiolite Nanofibers Decorated With Zn Single Sites: A Sustainable Filler for Mechanically Robust and Self‐Healing Ionomeric Elastomer Composites

Polymer Composites, EarlyView.
Fabrication of XNBR nanocomposites reinforced with Zn single‐site decorated sepiolite nanofibers. The resulting composites exhibit high mechanical strength and self‐healing performance, driven by dynamic interactions between the Zn single sites and the XNBR chains (inset).
Paolo Valagussa, Silvia Mostoni, Marianella Hernandez Santana, Itziar Mas Giner, Michele Mauri, Roberto Simonutti, Sandra Diré, Emanuela Callone, Barbara Di Credico, Roberto Scotti, Massimiliano D'Arienzo   +10 more
wiley   +1 more source