Results 71 to 80 of about 51,712 (271)
Derivation of Apollo 14 High-Al Basalts at Discrete Times: Rb-Sr Isotopic Constraints [PDF]
Pristine Apollo 14 (A-14) high-Al basalts represent the oldest volcanic deposits returned from the Moon [1,2] and are relatively enriched in Al2O3 (>11 wt%) compared to other mare basalts (7-11 wt%).
Hui. Hejiu +3 more
core +1 more source
Novel Bioactive Multifunctional Polyphenols: A Chemo‐Enzymatic Approach
Chemistry – A European Journal, EarlyView.One‐step synthesis of complex alkyl oxystilbenin glucosides (6‐47% yield) in alcoholic medium. Switching to ter‐BuOH as solvent afforded δ‐Viniferin diglucoside, with high selectivity and high yield (> 90%), that can be upgraded by enzymatic esterification to alkyl δ‐Viniferin diglucosides.
Amandine L. Flourat +8 more
wiley +1 more source
NWA 7034 Martian Breccia: Disturbed Rb-Sr Systematics, Preliminary Is Approximately 4.4 Ga Sm-Nd Age [PDF]
Agee et al. [1] reported a Rb-Sr age of 2.089 [plus or minus] 0.081 Ga for the unique Martian meteoritic breccia NWA 7034 making it the oldest Martian basalt, dating to the early Am-azonian epoch [2] of Martian geologic history.
Agee, C +3 more
core +1 more source
Geological Journal, EarlyView.Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae +6 more
wiley +1 more source
A Comparison of Microdrilling-TIMS/MC-ICPMS and LA-MC-ICPMS for Micro-sample Sr Isotope Measurement
Yankuang ceshi, 2014 Compared to the traditional strontium isotope analytical method, a micro-sample strontium isotope system study can reveal the heterogeneity of analyzed samples and is widely used in various fields of geology, such as crust-mantle interaction, genesis and
ZHANG Le +4 more
doaj +2 more sources
Sudbury project (University of Muenster-Ontario Geological Survey): Sr-Nd in heterolithic breccias and gabbroic dikes [PDF]
One major objective of our Sudbury project was to define origin and age of the huge breccia units below and above the Sudbury Igneous Complex (SIC). The heterolithic Footwall Breccia (FB) represents a part of the uplifted crater floor.
Brockmeyer, P. +4 more
core +1 more source
Geological Journal, EarlyView.The Pangkaimen Au–Ag deposits belong to the epithermal Au deposits, which are of great significance for guiding the research and development of this type of gold deposit. Metallogenic model diagram of Pangkaimen Au–Ag deposit. ABSTRACT The gold (Au) metallogenic belt in the northern Great Xing'an Range is characterised by the wide occurrence of the ...
Sheng Lu +8 more
wiley +1 more source
مجلة بغداد للعلوم, 2011 Grapes and grape seeds are important samples employed for environmental medical studies . The air of this work was to identify and concentration calculation of the elements in grapes fruit and thier seeds by using X-Ray fluoresces technique (XRF ...
Baghdad Science Journal
doaj +1 more source
International Journal of Gynecology &Obstetrics, EarlyView.Abstract Objective To determine delivery outcomes in women diagnosed with prelabor rupture of membranes (PROM) who required re‐amniotomy. Methods This retrospective cohort study included 24 966 women with PROM at a single university‐affiliated tertiary medical center (2011–2023).
Roza Berkovitz‐Shperling +4 more
wiley +1 more source
Rb-Sr age of K-rich LL-chondrite Yamato-74442 [PDF]
, 1995 Yamato-74442, a brecciated LL-group chondrite, consists of fragments with igeous texture, chondrules, mineral fragments, and host. The fragments involve K-rich fragments as well as normal ones.
Kagami, Hiroo +3 more
core +1 more source