Reaction and phases from monoclinic zirconia and calcium aluminate cement at high temperatures

Bruni, Yésica Lorena; Garrido, Liliana B.; Aglietti, E.F.

doi:10.1016/j.ceramint.2012.01.082

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Conversely, other regions are occupied by GATA factors despite lacking the consensus motif [24,25]. Consistently, even if most GATA factors bind to core GATA sequences, peculiar specificities have been reported for the flanking bases as well as for the fourth base of the GATA core element [26–29]. These studies revealed an elevated flexibility in the recognition sites for vertebrate and fungal GATA factors, much greater than previously anticipated, making the search for GATA sites and their enrichment in GATA-regulated genes tedious and unproductive.…”

Section: Introductionmentioning

confidence: 90%

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

et al. 2019

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GATA transcription factors are highly conserved among eukaryotes and play roles in transcription of genes implicated in cancer progression and hematopoiesis. However, although their consensus binding sites have been well defined in vitro, the in vivo selectivity for recognition by GATA factors remains poorly characterized. Using ChIP-Seq, we identified the Dal80 GATA factor targets in yeast. Our data reveal Dal80 binding to a large set of promoters, sometimes independently of GATA sites, correlating with nitrogen- and/or Dal80-sensitive gene expression. Strikingly, Dal80 was also detected across the body of promoter-bound genes, correlating with high expression. Mechanistic single-gene experiments showed that Dal80 spreading across gene bodies requires active transcription. Consistently, Dal80 co-immunoprecipitated with the initiating and post-initiation forms of RNA Polymerase II. Our work suggests that GATA factors could play dual, synergistic roles during transcription initiation and post-initiation steps, promoting efficient remodeling of the gene expression program in response to environmental changes.

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Section: Introductionmentioning

confidence: 90%

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

et al. 2019

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“…The effect of the presence of CA 2 on the reduction in density may be explained by its comparatively low theoretical density (3.1 g/cm 3 ) in relation to that of zirconia (6-5.6 g/cm 3 ) (Bruni et al 2012b). Moreover, the coarser and wider particle size distribution of cement with the largest grain size determined a lower efficiency of particle packing than that existing when increase the fraction of m-ZrO 2 .…”

Section: Linear Shrinkage and Densificationmentioning

confidence: 97%

Properties of CaO-ZrO2 Based Composites

Bruni

Garrido

Aglietti

2015

Procedia Materials Science

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“…The main crystalline phases identified by XRD in the sintered composites were c-ZrO 2 (Ca 0.15 Zr 0.85 O 1.85 ), CA 2 (CaAl 4 O 7 ) and residual m-ZrO 2 . The extent of c-ZrO 2 formation depended on the reactant concentrations and sintering temperature, since it involves diffusion mechanisms [15]. As mentioned above, the c-ZrO 2 formation in the reaction sintered composites was determined by the Rietveld method.…”

Section: Crystalline Phase Composition Determinedmentioning

confidence: 99%

Densification and mechanical properties of ZrO₂–CaAl₄O₇ composites obtained by reaction sintering

Bruni

Booth

Garrido

et al. 2016

International Journal of Materials Research

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Composites of the ZrO2–CaO–Al2O3 system exhibit high corrosion resistance and high chemical stability, these being suitable properties for enhanced performance as refractories. In this work composites based on ZrO2–CaAl4O7 (CA2) were developed by reaction sintering of two pure ZrO2 powders with different particle size (d50 = 0.44 μm and d50 = 8 μm) mixed with high-alumina cement. The effects of CaO to ZrO2 molar ratio, particle size of ZrO2 and sintering temperature on densification, c-ZrO2 formation, microstructure and mechanical properties (Vickers hardness, dynamic Young's modulus and compressive strength) were determined. Porosity and mean pore size of composites reduced with decreasing both particle size of ZrO2 and CaO content. The highest compression strength of ∼350 MPa and hardness of 6 GPa corresponded to dense ZrO2-based composite with 15 vol.% CA2 sintered at 1400°C.

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Reaction and phases from monoclinic zirconia and calcium aluminate cement at high temperatures

Cited by 7 publications

References 19 publications

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

Properties of CaO-ZrO2 Based Composites

Densification and mechanical properties of ZrO₂–CaAl₄O₇ composites obtained by reaction sintering

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Reaction and phases from monoclinic zirconia and calcium aluminate cement at high temperatures

Cited by 7 publications

References 19 publications

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

Transcription-dependent spreading of the Dal80 yeast GATA factor across the body of highly expressed genes

Properties of CaO-ZrO2 Based Composites

Densification and mechanical properties of ZrO2–CaAl4O7 composites obtained by reaction sintering

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Product

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Densification and mechanical properties of ZrO₂–CaAl₄O₇ composites obtained by reaction sintering