Results 51 to 60 of about 540,378 (271)

Rb-Sr ages of chondrules and carbonaceous chondrites [PDF]

Journal of Geophysical Research, 1965
Rubidium-strontium and potassium-strontium isotope composition of carbonaceous chondrites and chondrules - age of carbonaceous ...
V. Rama Murthy, W. Compston
openaire   +1 more source

Flexoelectric Suppression of Interfacial Carrier Loss in BaTiO3 Thin‐Film Bulk Photovoltaic Systems

Advanced Science, EarlyView.
In single‐crystalline BaTiO3 thin films, flexoelectric strain gradients strongly enhance photocurrent by suppressing interfacial carrier loss. Loading experiments reveal a ∼35‐fold photocurrent increase with applied force. Self‐consistent electrostatic modeling shows that strain gradients reshape the interfacial potential landscape, strengthen local ...
Minwoo Jang, Hyunkyu Lim, Sanghoon Yeom, Jaewhan Oh, Yongsoo Yang, Hyungwoo Lee   +5 more
wiley   +1 more source

Progressive Melt Fractionation as the Primary Control on the Formation of Rare-Metal Pegmatites: Evidence for Continuous Granite–Pegmatite Evolution in the Central Kalba Ore District, Eastern Kazakhstan

Geosciences
Rare-metal pegmatites of the Kalba–Narym belt (Eastern Kazakhstan) represent an important source of Li, Cs, Ta, Nb, Be, and associated critical metals. Despite extensive geological investigations, the relationships between granites, pegmatites, and late ...
Marina A. Mizernaya, Saltanat S. Aitbayeva, Anastassiya P. Miroshnikova, Reimar Seltmann, Alla Dolgopolova, Oxana N. Kuzmina, Christophe Pascal, Bakytzhan B. Amralinova, Zinaida I. Chernenko, Zhanar Z. Kapzhaparova   +9 more
doaj   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Fallick, A.E., Robert M. Ellam, Anthony E. Fallick, Graham, C.M., Ellam, R.M., Christopher W. Thomas, Thomas, C.W., Colin M. Graham   +7 more
core   +1 more source

Machine Learning‐Driven Design of Multicomponent Bone Inorganic Matrix Mimicking Scaffolds for Osteogenesis Enhanced by Neurogenesis

Advanced Science, EarlyView.
Schematic illustration of development of experimental datasets and algorithm models, screening and preparation of the scaffolds and their applications in vivo. ABSTRACT Bone defects require materials with osteogenic, neurogenic, and angiogenic activity, yet designing such materials within high‐dimensional compositional spaces remains challenging. Here,
Kunlu Lin, Ying Yang, Chuyao Zhou, Hanyue Mao, Zhiquan Zhang, Libangxi Liu, Xiaoying Yu, Haoming Liu, Long Liu, Xiaoyan Wang   +9 more
wiley   +1 more source

(Table 3) Rb and Sr concentration and Sr isotope composition of smectites and celadonites precipitated in vesicles of ODP Hole 104-642E

, 1989
(Table 3) Rb and Sr concentration and Sr isotope composition of smectites and celadonites precipitated in vesicles of ODP Hole 104 ...
Johnson, E S, E S Johnson (7930439), LeHuray, A P, A P LeHuray (7929620)   +3 more
core   +1 more source

RNA Promotes Synapsin Condensates That Organize Synaptic Vesicles in Live Neurons and Enable Localized Translation in Reconstituted System

Advanced Science, EarlyView.
Condensates at synapses organize synaptic vesicles (SVs) and are crucial for efficient neurotransmitter release, yet how RNA contributes to this mesoscale architecture remains poorly understood. Here we uncover that RNA modulates synapsin–driven condensates.
Branislava Rankovic, Zachary M. Geisterfer, Akshita Chhabra, Vladimir M. Jovanovic, Ian Seim, Christian Hoffmann, Antonela Condric, Gerard Aguilar Pérez, Rinse de Boer, Lars T. Hofstede, Jingao Sun, Kiara Freitag, Katja Nowick, Marina Jendrach, Frank L. Heppner, Vladimir Despic, Michaela Müller‐McNicoll, Stephan Sigrist, Geert van den Bogaart, Sofiia Reshetniak, Amy S. Gladfelter, Dragomir Milovanovic   +21 more
wiley   +1 more source

Provenance of fine-grained sedimentary rocks derived from Rb-Sr and Sm-Nd analyses: the example of the Santa Maria Formation (Triassic, Parana Basin, Southern Brazil)

Latin American Journal of Sedimentology and Basin Analysis, 2006
In this work, the Rb-Sr and Sm-Nd methods were applied to fine-grained sedimentary rock samples of the Santa Maria Formation (Triassic, Paraná Basin) in order to have provenance informations.
Diogo Rodrigues Andrade Da Silva, Ana Maria Pimentel Mizusaki, Sylvia Maria Couto Dos Anjos, Edinei Koester, André Weissheimer De Borba   +4 more
doaj  

Geochemistry and tectonic controls of the effusive activity related with the ancestral Nevado del Ruiz volcano, Colombia [PDF]

Geofísica Internacional, 2009
In this paper, we discuss the geochemical aspects and the tectonic setting of the effusive activity between 2.0 to 1.0 Ma (the Ancestral Ruiz stage) of Nevado del Ruiz Volcano (NRV: 4° 50-55’N, 75° 14-20’ W, 5,390 masl), this volcano rises at the ...
H. Castillo, M. Alvarán, L. M. Toro, C. Borrero   +3 more
doaj  

Modification of the Continental Crust by Subduction Zone Magmatism and Vice-Versa: Across-Strike Geochemical Variations of Silicic Lavas from Individual Eruptive Centers in the Andean Central Volcanic Zone

Geosciences, 2013
To better understand the origin of across-strike K2O enrichments in silicic volcanic rocks from the Andean Central Volcanic Zone, we compare geochemical data for Quaternary volcanic rocks erupted from three well-characterized composite volcanoes situated
Gary S. Michelfelder, Todd C. Feeley, Alicia D. Wilder, Erik W. Klemetti   +3 more
doaj   +1 more source