Resistance And Transformation
Mostrando 1-12 de 942 artigos, teses e dissertações.
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1. Thermal decomposition and reaction sintering for synthesis of mullite-zirconia composite using kaolin, γ-alumina and zirconia
Abstract The refractory materials used in the wall of the furnaces for glass melting can be prepared from mullite-zirconia composite material. The composite of mullite/zirconia was synthesized from Iraqi kaolin, γ-alumina, and zirconia using thermal decomposition with reaction sintering at 1600 °C. Several batches were prepared with various ratios of kaoli
Cerâmica. Publicado em: 2021-03
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2. Influence of Zirconium Percentage on Microhardness and Corrosion Resistance of Ti50 Ni50-xZrx Shape Memory Alloys
To obtain high temperature shape memory alloys of the lower cost Ni-Ti-X system, elements such as Hf and Zr are introduced to modify the thermal and mechanical properties of these alloys. This work studied the production and characterization of Ti50 Ni50-x Zrx alloys (x = 0, 5, 10 at.%) with the aim of improving their thermal, mechanical and corrosion resist
Mat. Res.. Publicado em: 19/08/2019
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3. Synthetic and minimalist vectors for Agrobacterium tumefaciens-mediated transformation of fungi
Abstract We present a collection of minimalist binary vectors for transformation through ATMT applicable to several fungi species. pLUO plasmid binary vectors consist of a reporter module containing fluorescent proteins, mCherry or eGFP, flanked by a multiple cloning site and a transcription terminator site. They also present a synthetic gene allowing resist
Genet. Mol. Biol.. Publicado em: 13/06/2019
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4. O ESTADO RACIAL DA UNIÃO: compreendendo raça e desigualdade racial nos Estados Unidos da América
Este artigo investiga o papel da raça e do racismo nos Estados Unidos da América. Ele trata de raça como conceito, explorando, primordialmente, o motivo da existência de categorias raciais e da desigualdade racial. Também, nele, examinamos a atual situação da raça nos Estados Unidos ao expor suas manifestações sociais, econômicas e políticas. Ap�
Cad. CRH. Publicado em: 03/06/2019
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5. Temperature Dependence of Electrical Resistance in Ge-Sb-Te Thin Films
Nowadays, the Ge-Sb-Te system is studied extensively for use in the field of both electrical and optical non-volatile memories. The key of this application is based on the changes in the physical properties (electrical conductivity or refractive index) of these films as a result of structural transformation between amorphous and crystalline states. Both stat
Mat. Res.. Publicado em: 18/02/2019
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6. Different yellowing degrees and the industrial utilization of flue-cured tobacco leaves
ABSTRACT: Yellowing is a key stage in the curing of flue-cured tobacco (Nicotiana tobacum L.) as much of the chemical transformation occurs during this period. This study examined the effect of different yellowing degrees on the value of flue-cured tobacco leaves at the farm level for both processing and manufacturing. The study was conducted in the counties
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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7. The Influence and Mechanism of Residual Stress on the Corrosion Behavior of Welded Structures
To study the influence of residual stress on the corrosion behavior of welded structures, methods such as residual stress measurement, microstructure observation, and corrosion morphology observation were used. The energy transformation model and corrosion-resistance constant model were utilized to reveal the mechanism of residual stress on the welded struct
Mat. Res.. Publicado em: 26/07/2018
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8. Impact of Alloy Composition and Thermal Stabilization on Martensitic Phase Transformation Structures in CuAlMn Shape Memory Alloys
Alloys of CuAlMn are known as cheap, high strength shape memory alloys with an excellent damping capacity within their austenitic-martensitic phase transformation, compared to alloy systems like NiTi, CuZnAl or MnCu. But CuAlMn alloys have disadvantage due to generation of voids by a high shrinkage which further increases the existing proneness to stress cra
Mat. Res.. Publicado em: 19/07/2018
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9. Obtención de aceros de baja aleación con diferentes contenidos de Ni y similares microestructuras y propiedades mecánicas
ABSTRACT Low alloy steels are used in many applications in the oil and gas industry. The addition of Ni in these steels improves their low temperature fracture toughness and hardenability, with a low penalty on weldability. However, ISO 15156-2 standard restricts Ni content up to a 1 wt% limit, requiring additional and expensive tests if higher Ni steels are
Matéria (Rio J.). Publicado em: 19/07/2018
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10. Genetic transformation of Brachiaria brizantha cv. Marandu by biolistics
ABSTRACT Brachiaria brizantha is a forage grass well adapted to tropical areas and cultivated in millions of hectares in Brazil. The apomictic mode of reproduction in this species, in addition to differences in ploidy between sexual and apomictic plants, impairs crossbreeding. The development of a methodology to transform apomictic cultivars will provide an
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
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11. Gene transfer utilizing pollen-tubes of Albuca nelsonii and Tulbaghia violacea
Abstract Developing a tissue culture-independent genetic transformation system would be an interesting technique for gene transfer in valuable medicinal and horticultural plants. Efficient gene delivery (Agrobacterium tumefaciens strain LBA 4404: harbouring PBI121 plasmid) was achieved with Km-resistant pollen grains (pollen tube technique) and were found to
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-09
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12. Double Kinetics of Intermetallic Phase Precipitation in UNS S32205 Duplex Stainless Steels Submitted to Isothermal Heat Treatment
One of the most studied deleterious phases in stainless steels is the sigma phase, due to its high potential to decrease the toughness and corrosion resistance of these steels. Eight samples of as-received cold rolled UNS S32205 duplex stainless steel were submitted to isothermal heat treatments at 850 oC during 10, 15, 30, 60, 120, 180, 240, and 300 minutes
Mat. Res.. Publicado em: 26/06/2017