Results 141 to 150 of about 51,712 (271)

Ar-39-Ar-40 of achondrites: Evidence for a lunar-like cataclysm [PDF]

The observation that the K-Ar, Pb-Pb, and Rb-Sr ages of a significant number of lunar highland rocks were reset in the interval of 4.1-3.8 Ga ago led to the concept of a cataclysmic bombardment of the moon during this period.
Bogard, D. D., Garrison, D. H.
core   +1 more source

Transgenic Tobacco Plants Expressing Synthetic Peptides: A Functional and Structural Analysis for Pathogen Resistance

Plant Biotechnology Journal, EarlyView.
Peptide Power: VR18 & KG18 Shield Tobacco from Bacterial Attack. A schematic shows how antimicrobial peptides VR18 and KG18 fight Pseudomonas syringae—bursting bacterial membranes and boosting disease resistance in transgenic tobacco, without harming plant health.
Karishma Biswas, Sudipta Mitra, Dibakar Roy, Sanhita Roy, Dibakar Sarkar, DeokHyun Son, Rohit Das, Anuradha Roy, Dulal Senapati, Humaira Ilyas, A. Harikishore, Ranjit Biswas, Suman Chakrabarty, DongKuk Lee, Indranil Biswas, Sudipto Saha, Pallob Kundu, Anirban Bhunia   +17 more
wiley   +1 more source

Speculations on nature and extent of Archean basement in Labrador as indicated by SR, ND and PB isotopic systematics of proterozoic intrusives [PDF]

The Sm-Nd and Rb-Sr isotopic compositions of mid to late Proterozoic (approximately 1.6 to 1.1 Ga) massif-type anorthosites and mafic intrusives in the eastern Canadian shield are correlated with geographic location.
Ashwal, L. D., Emslie, R. F., Wooden, J. L.   +2 more
core   +1 more source

Rb-Sr Method

Journal of Geography (Chigaku Zasshi), 1986
openaire   +2 more sources

Multi‐Elemental Analysis for Geographical Tracing of Chickpeas Produced in Nearby Locations Around a Protected Geographical Indication

Plant, Cell &Environment, EarlyView.
ABSTRACT The multi‐elemental profile has repeatedly been proposed as a reliable indicator of the geographical origin of plant‐derived foods, as mineral composition accurately reflects the local soil geochemistry and environmental factors. However, this approach may fail in distinguishing specimens from nearby locations, which are expected to be exposed
Ana Sayago, Raúl González‐Domínguez, Ángeles Fernández‐Recamales   +2 more
wiley   +1 more source

Time‐series multi‐omics analysis of micronutrient stress in Sorghum bicolor reveals iron and zinc crosstalk and regulatory network conservation

Plant Biology, EarlyView.
Overlap between Fe and Zn responsive gene regulatory networks (GRNs) were found, indicative of micronutrient crosstalk, and conservation of root and leaf GRNs and genes suggests strong constraint on homeostasis networks in plants. Abstract Micronutrient stress impacts growth, biomass production, and grain yield in crops.
A. Mishra, A. Bhat, S. Kumari, R. Sharma, J. Braynen, D. Tadesse, S. El Alaoui, S. Seaver, N. Grosjean, D. Ware, M. Xie, T. Paape   +11 more
wiley   +1 more source

Variations in downslope activity and bottom current dynamics in a land‐detached submarine channel system since the Last Glacial Maximum

Sedimentology, EarlyView.
ABSTRACT The Gollum Channel System is a land‐detached large‐scale canyon‐channel system situated offshore southwest Ireland on the Northeast Atlantic margin. The system has been considered inactive with downslope gravity flows since the last glacial period, but geophysical data in some of its branches do suggest Holocene activity.
Lotte Verweirder, Aggeliki Georgiopoulou, Kobus Langedock, Fred Fourie, Martin White, Sara Benetti, Fabio Sacchetti, Wieter Boone, David Van Rooij   +8 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
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  

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, EarlyView.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite

Terra Nova, EarlyView.
ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley   +1 more source