Javier Ochoa - Academia.edu (original) (raw)

Papers by Javier Ochoa

Research paper thumbnail of Protective immunity of biodegradable nanoparticle-based vaccine against an experimental challenge with Salmonella Enteritidis in mice

Research paper thumbnail of Diagnostic role of new Doppler index in assessment of renal artery stenosis

Cardiovascular Ultrasound, 2006

Background: Renal artery stenosis (RAS) is one of the main causes of secondary systemic arterial ... more Background: Renal artery stenosis (RAS) is one of the main causes of secondary systemic arterial hypertension. Several non-invasive diagnostic methods for RAS have been used in hypertensive patients, such as color Doppler ultrasound (US). The aim of this study was to assess the sensitivity and specificity of a new renal Doppler US direct-method parameter: the renal-renal ratio (RRR), and compare with the sensitivity and specificity of direct-method conventional parameters: renal peak systolic velocity (RPSV) and renal aortic ratio (RAR), for the diagnosis of severe RAS.

Research paper thumbnail of Porosity; microhardness correlation of sintered (Al 1− y Cr y ) 2O 3 solid solutions

Journal of Alloys and Compounds, 1999

Research paper thumbnail of Phase relations, microstructure and mechanical properties of VC substituted WC-10Co cemented carbide alloys

International Journal of Refractory Metals & Hard Materials, 1997

As an effort to investigate a possible extent of substitution of W, the metal from strategic mine... more As an effort to investigate a possible extent of substitution of W, the metal from strategic mineral, by a less strategic V, phase relations, microstructure, and hardness and fracture strength, of powder metallurgically processed 90 mass% [(l -y)WC-yVC]-10 mass% Co alloys are studied. Throughout the composition eight phases, cc-Co, P-Co, WC, V,C,, V,C,, q3(Co,W,C), q,(Co,W,C) and graphite C(g), were encountered and a distinct microstructural difference existed across midcomposition. On the basis of combined mechanical properties of hardness and fracture strength the alloys between y = 0.2 and 0.4, which correspond to 18-36 mass % VC, were most promising. Contrary to the antagonistic relations between hardness and toughness commonly encountered in cemented carbides and hard materials, the hardness and fracture strength of the present WC-VC-1OCo alloys were nearly parallel. 0 1997 Published by Elsevier Science Limited

Research paper thumbnail of Problemas resueltos

Research paper thumbnail of Protective immunity of biodegradable nanoparticle-based vaccine against an experimental challenge with Salmonella Enteritidis in mice

Research paper thumbnail of Diagnostic role of new Doppler index in assessment of renal artery stenosis

Cardiovascular Ultrasound, 2006

Background: Renal artery stenosis (RAS) is one of the main causes of secondary systemic arterial ... more Background: Renal artery stenosis (RAS) is one of the main causes of secondary systemic arterial hypertension. Several non-invasive diagnostic methods for RAS have been used in hypertensive patients, such as color Doppler ultrasound (US). The aim of this study was to assess the sensitivity and specificity of a new renal Doppler US direct-method parameter: the renal-renal ratio (RRR), and compare with the sensitivity and specificity of direct-method conventional parameters: renal peak systolic velocity (RPSV) and renal aortic ratio (RAR), for the diagnosis of severe RAS.

Research paper thumbnail of Porosity; microhardness correlation of sintered (Al 1− y Cr y ) 2O 3 solid solutions

Journal of Alloys and Compounds, 1999

Research paper thumbnail of Phase relations, microstructure and mechanical properties of VC substituted WC-10Co cemented carbide alloys

International Journal of Refractory Metals & Hard Materials, 1997

As an effort to investigate a possible extent of substitution of W, the metal from strategic mine... more As an effort to investigate a possible extent of substitution of W, the metal from strategic mineral, by a less strategic V, phase relations, microstructure, and hardness and fracture strength, of powder metallurgically processed 90 mass% [(l -y)WC-yVC]-10 mass% Co alloys are studied. Throughout the composition eight phases, cc-Co, P-Co, WC, V,C,, V,C,, q3(Co,W,C), q,(Co,W,C) and graphite C(g), were encountered and a distinct microstructural difference existed across midcomposition. On the basis of combined mechanical properties of hardness and fracture strength the alloys between y = 0.2 and 0.4, which correspond to 18-36 mass % VC, were most promising. Contrary to the antagonistic relations between hardness and toughness commonly encountered in cemented carbides and hard materials, the hardness and fracture strength of the present WC-VC-1OCo alloys were nearly parallel. 0 1997 Published by Elsevier Science Limited

Research paper thumbnail of Problemas resueltos