Results 71 to 80 of about 934 (243)
Advanced Science, EarlyView.We report photostable, photoluminescent deep eutectic solvents (DESs) powered by in situ‐formed zero‐dimensional (0D) halometallates. Stabilized by microenvironment‐controlling hydrogen bond acceptor (HBA) and donor (HBD) networks, these DESs exhibit vibrant, metal ion‐tunable emission (PLQY = 60.2%).
Jeesu Moon +4 more
wiley +1 more source
Advanced Science, EarlyView.Lanthanide‐doped polyurea microspheres are prepared via a facile one‐step precipitation polymerization. They exhibit strong hydrogen‐bonding and coordination interactions with excellent properties, including multicolor emission, high quantum yield (75.3%), remarkable stability, redispersibility, and biocompatibility.
Guiyu Zhang +9 more
wiley +1 more source
Advanced Science, EarlyView.This study introduces a biomimetic “nanofusion” platform that integrates the biostability of threose nucleic acids (TNA) with homotypic cell‐membrane cloaking to combat drug‐resistant TNBC. By leveraging a non‐canonical membrane‐fusion pathway for direct cytosolic delivery, the platform bypasses endosomal sequestration. To achieve potent AKT2 silencing
Wei Zheng +7 more
wiley +1 more source
Optically Stimulated Luminescence (OSL) Dating of Shallow Marine Sediments
The Quaternary Research (Daiyonki-Kenkyu), 2003 段丘堆積物の年代測定研究の一環として,光ルミネッセンス(OSL)年代測定法の浅海成堆積物への適用性を検討した.まず,石英の光曝・加熱・エッチング実験を実施し,この結果に基づく試料調整手順を示した.続いて,年代既知(酸素同位体ステージ5e～5c)の浅海成堆積物を対象として,付加線量法によるOSL年代測定を実施した.この結果,前浜堆積物および前浜～外浜遷移帯堆積物から,層位学的・地形学的に推定される離水年代とおおむね調和的な88～112kaのOSL年代値を得た.一方,後浜堆積物ではより新しく,外浜堆積物ではより古いOSL年代値が得られた.これらの結果から,前浜堆積物および前浜～外浜遷移帯堆積物中では光ブリーチングが成立していると考えられる.したがって,精度は粗いが ...
Hataya, Ryuta, Shirai, Masaaki
openaire +2 more sources
Brazilian Journal of Radiation Sciences, 2019 It has been reported that the formation and stabilization of coastal dune fields in Brazil have a dependence on the climatic changes, Relative Sea Level (RSL) variations, etc.
Lucas Sátiro do Carmo
doaj +1 more source
GeosciencesCahuachi (Nazca River Valley, South Peru) was the major ceremonial center of the Nasca civilization. According to previous studies, it was struck and destroyed by three El Niño-Southern Oscillation events, which would have occurred around 100 BCE, 600 CE
Marco Delle Rose +7 more
doaj +1 more source
Yankuang ceshiOptically stimulated luminescence (OSL) dating includes the measurement of the equivalent dose and the environmental dose rate. The accurate determination of uranium, thorium and potassium is an important step in ensuring the accurate calculation of the ...
Na WANG +6 more
doaj +1 more source
Possible reasons for anomalous fading in alkali feldspars used for luminescence dating of Quaternary deposits [PDF]
Estonian Journal of Earth Sciences, 2007 According to many publications, alkali feldspars are characterized by specific athermal (anomalous) fading of their thermoluminescence and optically-stimulated luminescence.
Jaek, Ivar +2 more
doaj
Towards the optically stimulated luminescence dating of unheated flint
Quaternary GeochronologyFlint tools are important archaeological finds, but unheated specimens remain challenging to date. The optical luminescence properties of the microcrystalline flint differ from sedimentary quartz grains, and optically stimulated luminescence (OSL) has, therefore, only occasionally been used to date heated flint specimens.
L. Ageby +4 more
openaire +2 more sources
Brazilian Journal of Geology: The development of optically stimulated luminescence (OSL) dating of sediments has led to considerable advance in the geochronology of the Quaternary.
André Oliveira Sawakuchi +10 more
doaj +1 more source