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Article
Effects of ants on riparian poplars: an ex situ experiment of biotic interaction
Poplars establish on alluvial bars within sand and gravel-bed rivers. Alluvial bars also provide particularly suitable habitats for the proliferation of ants. We hypothesized that ants, by modifying substrate ...
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Chapter
Microbial Antagonists from Different Environments Used in the Biocontrol of Plant Pathogens
The control of plant diseases is generally done with the application of synthetic pesticides; however, their use causes problems of environmental contamination and human and animal health. Biocontrol through t...
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Article
Artificial reproduction of magnetic fields produced by a natural geomagnetic storm increases systolic blood pressure in rats
The incidence of geomagnetic storms may be associated with changes in circulatory physiology. The way in which the natural variations of the geomagnetic field due to solar activity affects the blood pressure a...
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Article
Water relations and gas exchange in olive trees under regulated deficit irrigation and partial rootzone drying
It is widely believed that partial root drying (PRD) reduces water losses by transpiration without affecting yield. However, experimental work carried out to date does not always support this hypothesis. In ma...
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Article
10 Designing a Score for Assesing Etiology in Children with Pneumonia
Background: Although an etiological diagnosis is important for therapeutic decisions in children with pneumonia, this is often based on clinical, laboratory and radiological findings on admission.
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Article
To be Born at High Altitude: Influence of Altitude, Nutrition and Socioeconomic Conditions on Fetal Growth
Chronic hypoxia in high altitude constitutes an associated factor for fetal growth restriction, even when there is genetic adaptation, as observed in studies performed in populations living at high altitudes (...
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Article
BaTiO3 formation by thermal decomposition of a (BaTi)-citrate polyester resin in air
Barium titanate nanosized powders were prepared by a slightly modified Pechini method. The obtained polymerized resin was used as the precursor for BaTiO3 powder production. DTA TG thermal analysis indicated that...
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Chapter
Bi4Ti3O12-Based Piezoelectric Ceramics for High Temperature Applications
High temperature piezoelectric ceramics based on WO3-doped Bi4Ti3O12 (WBIT) were prepared by two ways: chemical (hydroxide coprecipitation) and conventional oxides mixing. Sintering was carried out between 800°-1...
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Article
Titanium local environment and electrical conductivity of TiO2-doped stabilized tetragonal zirconia
Solid state reactions in the ZrO2-Y2O3-TiO2system have been studied and the solid solubility limit of TiO2 in yttria stabilized tetragonal zirconia Y-TZP has been stablished. Structural characterization was carri...
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Article
Preparation of nanometric titanium hydrous oxide particles by vapour phase hydrolysis of titanium tetrabutoxide
Spherical titanium nanoparticles in the range of 60 to 500 nm have been obtained by a vapour-phase hydrolysis procedure using titanium tetrabutoxide as raw material. In this work, different parameters such as ...
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Article
Phase transition and electrical conductivity in the system YMnO3-CaMnO3
Solid solution formation between the ferroelectric hexagonal compound YMnO3 and the semiconducting perovskite compound CaMnO3 has been studied in the Y-rich region of the pseudobinary system. The materials were p...
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Article
Lower air-crystallization temperature and nanostructured yttria-doped tetragonal zirconia polycrystals ceramics by seeding assisted chemical coprecipitation
The crystallization temperature of yttria-doped tetragonal zirconia polycrystals (Y-TZP) amorphous precursors can be lowered 150 °C below that currently used (≥500 °C), if “seeding assisted chemical coprecipit...
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Article
Structure and electrical behavior in air of TiO2-doped stabilized tetragonal zirconia ceramics
-doped YTZP ([%mol]3 Y2O3) compositions sintered in the temperature range of 1300 to 1450 °C, the tetragonal zirconia solid solutions field for the ZrO2-Y2O3-TiO2 system was established. The solubility of TiO2 in...
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Article
Association Between Structural and Functional Factors of the Family Environment WITH the Child Development and Iq in the Tierra Del Fuego Children3
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Article
Nanostructured and near defect-free ceramics by low-temperature pressureless sintering of nanosized Y-TZP powders
Nanosized (∼6 nm) Y-TZP (3 mol% Y2O3) powders have been produced by chemical co-precipitation (Y-inorganic + Zr-organic precursors) and thorough isopropanol-washing step, after calcining in air at 450 °C. The nan...
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Article
Seeding effects on crystallization of air-calcined Y-TZP amorphous precursors
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Article
Characterization and sintering behaviour of submicrometre titanium dioxide spherical particles obtained by gas-phase hydrolysis of titanium tetrabutoxide
Spherical fine (∼0.7 μm) titania powders were prepared by vapour-phase hydrolysis of a titanium tetrabutoxide/butanol solution. Powder X-ray diffraction showed that as-prepared powders were amorphous and cryst...
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Article
Ceramic–electrode interaction in PZT and PNN–PZT multilayer piezoelectric ceramics with AG/PD 70/30 inner electrode
Pb(Zr0.53Ti0.47)O3(PZT) and PbNi1/3Nb2/3O3-PZT (PNN–PZT) multilayers with Ag/Pd 70/30 inner electrodes have been studied from the point of view of the ceramic–electrode interaction. PZT multilayers have shown ...
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Article
Improving sintering behaviour of BaTiO3 by small do** additions
The dielectric properties of BaTiO3 ceramics are associated with its microstructure, which depends on the stoichiometric ratio, dopant nature, and ceramic processing. Optimum densification at low temperatures to ...
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Article
Preparation and sintering behaviour of submicronic Bi4Ti3O12 powders
Submicronic powders of Bi4Ti3O12 with different morphologies were prepared by both the oxalate coprecipitation and the conventional mixing oxides methods. Compacts of the two calcined powders were sintered at 850...
