Results 31 to 40 of about 14,606 (97)

Modulación composicional en la perovskita “PbCrO₃” y su influencia en las propiedades

Boletín de la Sociedad Española de Cerámica y Vidrio, 2010
In this work, we revisited the “PbCrO3” perovskite. In the late 60’s, it was claimed to be cubic and a G-type antiferromagnetic material (1, 2). We have encountered that an intrinsic compositional modulation is present and shows a deficiency in lead of ...
Alario-Franco, Á., Arévalo-López, Á. M., Dos Santos-García, A. J.   +2 more
doaj  

X-ray Flares Observed from Six Young Stars Located in the Region of Star Clusters NGC 869 and IC 2602 [PDF]

, 2013
We present, for the first time, an analysis of seven intense X-ray flares observed from six stars (LAV 796, LAV 1174, SHM2002 3734, 2MASS 02191082+5707324, V553 Car, V557 Car). These stars are located in the region of young open star clusters NGC 869 and
Himali Bhatt, J. Pandey, K. Singh, R. Sagar, Brijesh Kumar Astrophysical Sciences Division, Bhabha Atomic Research Center Aryabhatta Research Institu Research   +5 more
semanticscholar   +1 more source

Structural determination of new solid solutions [Y2-x Mx ][Sn2-x Mx ]O7-3x/2 (M = Mg or Zn) by Rietveld method [PDF]

Processing and Application of Ceramics, 2010
New [Y2-x Mx][Sn2-x Mx]O7-3x/2 (0 ≤x≤ 0.30 for M = Mg and 0 ≤x≤ 0.36 for M = Zn) solid solutions with the pyrochlore structure were synthesized via high-temperature solid-state reaction method.
Mohamed Douma, El Hossain Chtoun, Raquel Trujillano, Vicente Rives   +3 more
doaj  

Relación entre los mecanismos de difusión atómica y las propiedades ópticas en la sinterización por Spark Plasma Sintering (SPS) de la alúmina.

Boletín de la Sociedad Española de Cerámica y Vidrio, 2009
The control of the sintering parameters during spark plasma sintering (SPS) of polycrystalline alumina allows modifying the contribution due to the different atomic diffusion mechanisms.
Torrecillas, R., Fernández, A., Menéndez, J. L., Suárez, M.   +3 more
doaj  

Thickness-dependent piezoelectric behaviour and dielectric properties of lanthanum modified BiFeO3 thin films [PDF]

Processing and Application of Ceramics, 2011
Bi0.85La0.15FeO3 (BLFO) thin films were deposited on Pt(111)/Ti/SiO2 /Si substrates by the soft chemical method. Films with thicknesses ranging from 140 to 280 nm were grown on platinum coated silicon substrates at 500°C for 2 hours.
Glenda Biasotto, Francisco Moura, Cesar Foschini, Elson Longo, Jose A. Varela, Alexandre Z. Simões   +5 more
doaj  

Crucial effect of SiC particles on in situ synthesized mullite whisker reinforced Al2O3-SiC composite during microwave sintering

Processing and Application of Ceramics, 2017
Mullite whisker reinforced Al2O3-SiC composites were in situ synthesized by microwave sintering at 1500°C for 30min. The influence of SiC particle size on heating process and properties of Al2O3-SiC composite were investigated. The XRD and SEM techniques
Meng Wei, Rui Zhang, Keke Guan, Bingbing Fan, Weimin Long, Jia Ma, Hongsong Zhang   +6 more
doaj   +1 more source

Epigenomic diversity of colorectal cancer indicated by LINE-1 methylation in a database of 869 tumors

Molecular Cancer, 2010
BackgroundGenome-wide DNA hypomethylation plays a role in genomic instability and carcinogenesis. LINE-1 (L1 retrotransposon) constitutes a substantial portion of the human genome, and LINE-1 methylation correlates with global DNA methylation status ...
Y. Baba, C. Huttenhower, K. Nosho, Noriko Tanaka, K. Shima, A. Hazra, E. Schernhammer, D. Hunter, E. Giovannucci, C. Fuchs, S. Ogino   +10 more
semanticscholar   +1 more source

Propiedades mecánicas de cerámicos eutécticos Al₂O₃-ZrO₂ (Y₂O₃) y Al₂O₃-YAG procesados por solidificación direccional

Boletín de la Sociedad Española de Cerámica y Vidrio, 2005
The flexure strength of directionally-solidified Al2O3-ZrO2(Y2O3) and Al2O3-Y3Al5O12 eutectic ceramic composites processed by the laser-heating floating zone method was studied from 25ºC to 1427ºC.
de Francisco, I., Peñac, J. I., Llorca, J., Pastor, J. Y., Salazar, A., Oliete, P. B.   +5 more
doaj  

Structure and electrical properties of (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramics [PDF]

Processing and Application of Ceramics, 2018
In this work the effect of pseudo-cation (Mg2+1/3Nb5+2/3)4+ addition on Ti-site of (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics, having general formula (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 (0 ≤ x ≤ 1), on their structural and electrical properties was ...
Ashutosh Prasad, Ranjan Kumar Mishra, Kumar Prabhat Chandra, Kamal Prasad   +3 more
doaj   +1 more source

Aplicación de un material vitrocerámico a la biorremediación de metales pesados

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
In this study, a glassceramic material with hydroxyapatite phase was manufactured from industrial and urban wastes. On this material, biofilms from the microorganisms usually appearing in wastewater were developed.
García, A. M., Villora, J. M., Moreno, D. A., Ranninger, C., Callejas, P., Barba, M. F.   +5 more
doaj