Luiz A. Rocha
University of Minho
Publications 454
Titanium (Ti) and its alloys are widely used in dental implants and hip-prostheses due to their excellent biocompatibility. Growing evidence support that surface degradation due to corrosion and wear processes, contribute to implant failure, since the release of metallic ions and wear particles generate local tissue reactions (peri-implant inflammatory reactions). The generated ions and wear debris (particles at the micron and nanoscale) stay, in a first moment, at the interface implant-bone. Ho...
#1D.R.N. Correa (Grupo México)
#2Luiz A. Rocha (UNESP: Sao Paulo State University)H-Index: 46
Last.Takao Hanawa (Tokyo Medical and Dental University)H-Index: 41
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Abstract This study evaluated the mechanical properties and cytocompatibility of recently developed Ti-15Zr-based alloys with Mo addition for potential use as load-bearing implants. The phase composition and microstructure were changed by the alloying elements, being the β phase fully retained on the Ti-15Zr-10Mo and Ti-15Zr-15Mo samples. The TEM analysis showed that a small quantity of ω phase was precipitated on the samples with a high amount of Mo. Regarding the mechanical properties, the Ti-...
#1Pedro B. Tavares (University of Porto)H-Index: 26
#2Carlos M. Costa (University of Porto)H-Index: 1
Last.Germano Veiga (University of Porto)H-Index: 8
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Abstract The optimization of the information flow from the initial design and through the several production stages plays a critical role in ensuring product quality while also reducing the manufacturing costs. As such, in this article we present a cooperative welding cell for structural steel fabrication that is capable of leveraging the Building Information Modeling (BIM) standards to automatically orchestrate the necessary tasks to be allocated to a human operator and a welding robot moving o...
#1Lucas T. Nunes (UFSC: Universidade Federal de Santa Catarina)H-Index: 4
#2Isadora Cord (UFSC: Universidade Federal de Santa Catarina)
Last.Carlos E. L. Ferreira (Federal Fluminense University)H-Index: 24
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Chaetodontidae is among the most conspicuous families of fishes in tropical and subtropical coral and rocky reefs. Most ecological studies focus in the genus Chaetodon, while Prognathodes remains poorly understood. Here we provide the first account on the ecology of Prognathodesobliquus, a butterflyfish endemic to St. Peter and St. Paul’s Archipelago (SPSPA), Mid-Atlantic Ridge. We studied the depth distribution and foraging behaviour of P.obliquus through technical diving, remote-operated vehic...
#1Hudson T. Pinheiro (California Academy of Sciences)H-Index: 16
#2Bart Shepherd (California Academy of Sciences)H-Index: 5
Last.Luiz A. Rocha (California Academy of Sciences)H-Index: 46
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The Philippines is often highlighted as the global epicenter of marine biodiversity, yet surveys of reef-associated fishes in this region rarely extend beyond shallow habitats. Here, we improve the understanding of fish species diversity and distribution patterns in the Philippines by analyzing data from mesophotic coral ecosystems (MCEs; 30–150 m depth) obtained via mixed-gas rebreather diving and baited remote underwater video surveys. A total of 277 fish species from 50 families was documente...
1 CitationsSource
#1I. Çaha (University of Minho)
#2A. C. Alves (University of Minho)H-Index: 11
Last.Fatih Toptan (University of Minho)H-Index: 12
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Abstract Ti and its alloys exhibit combination of unique properties for biomedical applications, however their poor tribo-electrochemical behaviour is a major concern. Therefore, TiN coatings were deposited on cp-Ti (grade 4) by sputtering technique aiming the improvement of its tribocorrosion behaviour. The properties of the coated samples, using different TiN deposition times, were characterized by using grazing incidence X-ray diffraction, FIB-SEM, and nanoindentation. The corrosion behaviour...
Electrical energy produced by photovoltaic cells is extremely interesting because it originates from a clean and renewable source. However, cell efficiency is low due to factors such as temperature, solar spectrum radiation intensity, and incomplete use of all solar radiation wavelengths reaching the Earth (e.g., infrared radiation). Solar radiation reaching the Earth’s surface has ultraviolet, visible, and infrared components, which has motivated us to coat commercial polycrystalline silicon ce...
#1Hudson T. PinheiroH-Index: 16
#2Bart ShepherdH-Index: 5
Last.Luiz A. RochaH-Index: 46
view all 4 authors...
#1Bruna Carolina Costa (UNESP: Sao Paulo State University)H-Index: 4
#2A. C. Alves (University of Minho)H-Index: 11
Last.Paulo N. Lisboa-Filho (UNESP: Sao Paulo State University)H-Index: 20
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Abstract Titanium-based materials are widely employed by the biomedical industry in orthopedic and dental implants. However, when placed into the human body, these materials are highly susceptible to degradation processes, such as corrosion, wear, and tribocorrosion. As a consequence, metallic ions or particles (debris) may be released, and although several studies have been conducted in recent years to better understand the effects of their exposure to living cells, a consensual opinion has not...
1 CitationsSource
#1Ana Isabel SantosH-Index: 8
#2L. AmorimH-Index: 1
Last.Júlio C. VianaH-Index: 20
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Carbon nanotubes (CNTs) are one of the most promising materials in sensing applications due to their electrical and mechanical properties. This paper presents a comparative study between CNT Buckypaper (BP) and aligned CNT-based strain sensors. The Buckypapers were produced by vacuum filtration of commercial CNTs dispersed in two different solvents, N,N-Dimethylformamide (DMF) and ethanol, forming freestanding sheets, which were cut in 10 × 10 mm squares and transferred to polyimide (PI) films. ...