Results 11 to 20 of about 1,991 (161)
Abstract Arc volcanoes, created by magma generated from the dehydration of subducting slabs, show great variability in their sizes and along‐arc spatial distributions. In this study, we address a fundamental question, namely, how do subduction zones and volcanic arcs respond to the subduction of “atypical” oceanic lithosphere.
Claudia Adam +3 more
wiley +1 more source
Abstract BACKGROUND Local leafy vegetables are gaining attention as affordable sources of micronutrients, including vitamins, pro‐vitamin carotenoids and other bioactive compounds. Stinging nettles (Urtica spp.) are used as source of fibers, herbal medicine and food.
Alexander Montoya‐Arroyo +6 more
wiley +1 more source
Abstract Field observations and unmanned aerial vehicle surveys from Caldera Taburiente (La Palma, Canary Islands, Spain) show that pre‐existing dykes can capture and re‐direct younger ones to form multiple dyke composites. Chill margins suggest that the older dykes were solidified and cooled when this occurred.
Samuel T. Thiele +4 more
wiley +1 more source
Amygdaloidal basalt, as a heterogeneous rock, is widely exposed at Baihetan hydropower station, China. The geometric effect of amygdales needs further studies and quantifying the shape, orientation, and statistical distribution of amygdales plays an important role in the laboratory and numerical experiments.
Shirui Zhang +5 more
wiley +1 more source
Comparative Study on Mineral‐Scale Microcrack Propagation of Shale under Different Loading Methods
Producing a sufficient volume of multiscale crack networks is key to enhancing recovery of shale gas. The formation of crack network largely depends on initiation and propagation of microcracks. To reveal the influence of different loading methods on the propagation of mineral‐scale microcracks, this study used the Voronoi tessellation technique to ...
Jianyong Zhang +5 more
wiley +1 more source
A New Genus and Two New Species of Unarmed Hymenolepidid Cestodes (Cestoda: Hymenolepididae) from Geomyid Rodents in Mexico and Costa Rica [PDF]
Two new cestodes of the family Hymenolepididae are described from two species of rodents of the family Geomyidae collected in Mexico and Costa Rica. One new species of Hymenolepis is described from Cratogeomys planiceps Merriam 1895 from near Toluca ...
Campbell, Mariel +3 more
core +3 more sources
Volcanic CO2 output at the Central American subduction zone inferred from melt inclusions in olivine crystals from mafic tephras [PDF]
The volatile contents of olivine‐hosted (Fo89–71) melt inclusion glasses in rapidly quenched mafic tephras from volcanic front volcanoes of the Central American Volcanic Arc (CAVA) in Guatemala, Nicaragua, and Costa Rica, were analyzed by secondary ion
Auger +61 more
core +1 more source
Using a self‐designed hydraulic impact drilling test‐bed and rock core drill, six groups of cylindrical granite specimens (93 mm dia. × 200 mm) containing central axial holes formed either by impact or nonimpact drilling methods were tested in uniaxial compression to failure on an Instron 1346 universal testing machine to investigate their mechanics ...
Zhi Liu +5 more
wiley +1 more source
Nonnutritive sweetener use is a common practice worldwide. Although considered safe for human consumption, accumulating evidence suggests these compounds may affect metabolic homeostasis; however, there is no consensus on the role of frequent sweetener intake in appetite and weight loss.
Alberto A. Barrios-Correa +6 more
wiley +1 more source
MODELING OF THE UNCONFINED COMPRESSIVE STRENGTH TEST OF LIGNITE FROM PESTEANA OPENPIT MINE USING THE COMBINED FINITE-DISCRETE ELEMENT METHOD – FDEM [PDF]
The property of rocks to oppose and keep their shape almost unchanged under the action of load is called strength. Compressive strength is defined as the maximum stress a material can withstand until its failure. Besides the physical characteristics of
Alexandru Robert CIOCLU +2 more
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