Results 131 to 140 of about 424,073 (293)

Oxidation of volcanic rocks

open access: yesThe Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 1957
The writer has considered that magma has been re-heated in the course of ascending vent. Comparing the chemical composition of plutonic rocks with that of volcanic rocks, both are nearly equal in the amout of SiO2 and total iron and FeO/Fe2O3 is larger in plutonic rocks than volcanic rocks.
openaire   +2 more sources

The relationship between cellular protein content and selenium accumulation in freshwater microalgae

open access: yesIntegrated Environmental Assessment and Management, EarlyView.
Abstract Variability in the bioconcentration of selenium (Se) by primary producers at the base of the food web results in uncertainty in predictions of bioaccumulation and ecological risk to higher trophic level organisms. Water chemistry, speciation of Se, and periphyton community composition have all been suggested as factors that contribute to ...
Courtney Bogstie   +3 more
wiley   +1 more source

Interface Engineering of Boron Nitride–Polymer Composites for High Thermal Conductivity

open access: yesInformation &Functional Materials, EarlyView.
This review comprehensively discusses the impacts of interfacial design and fabrication strategies on boron nitride–polymer composites, and systematically classifies and summarizes recent advances in interfacial engineering based on the interaction modes between boron nitride fillers and polymer matrices.
Zhao Chen   +4 more
wiley   +1 more source

The German Soil Systematics and the Rationale Behind Its Revision

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background The German Soil Systematics is a pedogenetic classification based on the morphological expressions of pedogenic processes and has been developed over several stages since 1952. The system has successfully been in use for soil classification and soil survey for almost 70 years.
Einar Eberhardt   +3 more
wiley   +1 more source

Archeometric Investigation of the Stone Tools of the Vatya Culture (Pest County, Hungary) [PDF]

open access: yes, 2014
With the analysis of the middle Bronze Age (2000–1350 BC) Vatya culture findings in Pest county (Central Hungary) comprising of more than 400 polished stone tools and instrument tools this is the first archaeometric study with such scale in Hungary.
Farkas-Pető, Anna   +3 more
core  

Late Holocene environmental history of Dojran, Macedonia: Investigating the interplay of imperial dynamics and climatic change

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT This study presents a high‐resolution, multi‐proxy reconstruction of environmental and land‐use change from Lake Dojran over historical times (last 2500 years), combining pollen, biomarkers, radiocarbon dating, Ottoman taxation records and other historical data.
Alessia Masi   +15 more
wiley   +1 more source

Decoupling glacier retreat and surface stabilization on the Snežnik Plateau (Slovenia), insights from in situ cosmogenic 36Cl exposure and depth‐profile ages

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Glaciokarst landscapes pose distinctive challenges for cosmogenic dating because meltwater and runoff can be rapidly rerouted into ponors and conduit networks, weakening glacier–river coupling and promoting local sediment storage. We reconstruct glacier retreat and postglacial stabilization on the Snežnik Plateau (SW Slovenia) using in situ ...
Onur Altınay   +6 more
wiley   +1 more source

Dental enamel hypoplasia and intra‐tooth isotope records as indicators of physiological stress and environmental variability in Early Pleistocene hippopotamids from Melka Kunture (Upper Awash, Ethiopia)

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Enamel hypoplasia results from temporary disruptions of enamel deposition during tooth development. It is widely used as an indicator of physiological stress in archeological and paleontological contexts; yet, its relationship with environmental conditions during tooth formation remains poorly constrained.
Giuseppe Briatico   +3 more
wiley   +1 more source

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