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A functional dissociation of the left frontal regions that contribute to single word production tasks
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In: Neuroimage (2021)
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Lesions that do or do not impair digit span: a study of 816 stroke survivors
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In: Brain Commun (2021)
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Damage to Broca’s area does not contribute to long-term speech production outcome after stroke
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In: Brain (2021)
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Brain regions that support accurate speech production after damage to Broca’s area
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In: Brain Commun (2021)
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Right cerebral motor areas that support accurate speech production following damage to cerebellar speech areas
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In: Neuroimage Clin (2021)
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Research on bilingualism as discovery science
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In: Brain Lang (2021)
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A Data-Based Approach for Selecting Pre- and Intra-Operative Language Mapping Tasks
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In: Front Neurosci (2021)
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Neuromodulatory Control and Language Recovery in Bilingual Aphasia: An Active Inference Approach
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In: Behav Sci (Basel) (2020)
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The Flipped Classroom: An Innovative Approach to Medical Education in Ophthalmology
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In: J Acad Ophthalmol (2020)
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Kagta Iwitkekne Parikwaki - Parantunka ; Dicionário Palikur-Português e Vocabulário Português-Palikur
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Literacy for the 21st Century: A Balanced Approach, 3rd edition
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Brief Stimulus Exposure Fully Remediates Temporal Processing Deficits Induced by Early Hearing Loss
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Phase Relationships of Hydrous Alkalic Magmas at High Pressures: Production of Nepheline Hawaiitic to Mugearitic liquids by Amhibole-Dominated Fractional Crystallization within the Lithospheric Mantle
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In: Journal of Petrology (2015)
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Phase Relationships of Hydrous Alkalic Magmas at High Pressures: Production of Nepheline Hawaiitic to Mugearitic liquids by Amhibole-Dominated Fractional Crystallization within the Lithospheric Mantle
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In: Journal of Petrology (2015)
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Abstract:
Experimental melting studies were conducted on a nepheline mugearite composition to pressures of 31 kbar in the presence of 0-30% added water. A temperature maximum in the near-liquidus stability of amphibole (with olivine) was found for a water content of 3·5 wt % at a pressure of 14 kbar. This is interpreted to have petrogenetic significance for the derivation of nepheline mugearite magmas from nepheline hawaiite by amphibole-dominated fractional crystallization at depth within the lithospheric mantle. Synthetic liquids at progressively lower temperatures range to nepheline benmoreite compositions very similar to those of natural xenolith-bearing high-pressure lavas elsewhere, and support the hypothesis that continued fractional crystallization could lead to high-pressure phonolite liquids. Independent experimental data for a basanite composition modeled on a lava from the same igneous province (the Newer Basalts of Victoria) permit the inference that primary asthenospheric basanite magmas undergo polybaric fractional crystallization during ascent, and may evolve to liquids ranging from nepheline hawaiite to phonolite upon encountering cooler lithospheric mantle at depths of 42-50 km. Such a model is consistent with the presence in some evolved alkalic lavas of both lithospheric peridotite xenoliths indicative of similar depths and of megacryst suites that probably represent disrupted pegmatitic segregations precipitated from precursor alkalic magmas in conduit systems within lithospheric mantle.
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Keyword:
Amphibole; basanite; chemical composition; Experiment; experimental study; fractional crystallization; high pressure; Keywords: amphibole; lava; Lithosphere; magma; mantle chemistry; megacryst; nepheline group; Nepheline mugearite; precipitation (chemistry); xenolith Alkalic magmas
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URL: https://doi.org/10.1093/petrology/egm088 http://hdl.handle.net/1885/49820
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15 |
Dissociating the semantic function of two neighbouring subregions in the left lateral anterior temporal lobe
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Comparing language outcomes in monolingual and bilingual stroke patients
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Matrix analytic methods with Markov decision processes for hydrological applications.
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Dissecting the functional anatomy of auditory word repetition
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