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91.061  Articles
1 of 9.107 pages  |  10  records  |  more records»
In this work, a series of quaternary AlxInyGa1-x-yN thin films have been successfully achieved using metal organic chemical vapor deposition (MOCVD) method with adjustable trimethylaluminum (TMA) flows. Surface morphology and optical properties of AlxInyG... see more

Diffuse Reflectance Spectroscopy (DRS) is a rapid, relatively new method in Quaternary research to analysesediments and paleosols. This method takes into account clay mineral content, amount of Fe-bearing mineralsand grain size composition of samples, sim... see more

The Huarenchenque Formation is a volcano sedimentary unit deposited to the east of the Plio-Quaternary Andean Magmatic Arc. In order to define depositional settings, two lithofacies associations (fluvial and pyroclastic) were defined. The fluvial facies a... see more

The Quaternary sedimentary sequence in the inner area of the Bahia Blanca Estuary is analyzed.  A very compact Pliocene-Pleistocene sandy silt-silty sand is the oldest sediment which forms a hard basement of great areal extent in all of the estuary's... see more

The Roveto Valley is a narrow, elongated, NW-trending depression filled with continental Plio-Quaternary deposits that outcrop at different topographic elevations. A morpho-lithostratigraphic succession of the continental deposits has been defined in orde... see more

A mixture of vegetable oil and animal fat as raw materials was optimized by simplex-centroid mixture design to produce a type of biodiesel with good oxidative stability, flow properties and reaction yield. Further, kinetic and thermodynamic parameters of ... see more

Bioactive powders of the binary SiO2-CaO, ternary SiO2-CaO-P2O5 and quaternary systems SiO2-CaO-P2O5-Na2O/Mg2O were synthesized using a sol-gel route. The gels were converted into bioglasses powders by heat treatments at the temperature of 700°C. The resu... see more

Lutra lutra (Linnaeus, 1758) is the only otter living in Europe today, but the palaeodiversity of this group during the Pleistocene was much higher. Lutra simplicidens Thenius, 1965 is one of the best-known taxa from the European Quaternary fossil record,... see more

The Baix Ebre graben constitutes a small portion of the western mediterranean graben system related to the westem european Rift which is overimposed on the main structural trend. Other small grabens such as El Burga, l'Ametlla, l'Ampolla, Tortosa, La Séni... see more

1 of 9.107 pages  |  10  records  |  more records»