Consulta: subjectFacets:"Titanium"
Registros recuperados: 4
Data/hora: 07/06/2024 04:53:56

Hydroschorlomite in altered basalts from Hole 1256D, ODP Leg 206: The transition from low-temperature to hydrothermal alteration - art. no. Q10O03
Provedor de dados: 5
Autores: Laverne, Christine; Grauby, Olivier; Alt, Jeffrey C.; Bohn, Marcel.
Hydroschorlomite, a Ti-, Ca-, Fe-rich andraditic garnet present in the deepest cores of basalts (661-749 mbsf) drilled in Hole 1256D during Ocean Drilling Program (ODP) Leg 206 (equatorial east Pacific), is reported here for the first time in oceanic crust. Detailed petrological and mineralogical studies by optical microscope, electron microprobe, scanning and transmission electron microscope, and micro-Raman spectroscopy are used to characterize this hydrogarnet and its relationships with other minerals. Hydroschorlomite occurs in Hole 1256D as small (5-50 mu m) anhedral or euhedral crystals associated either with celadonite in black halos adjacent to celadonite veins or with brown saponitic phyllosilicate in brown alteration halos adjacent to veins of...
Tipo: Text
Palavras-chave: Mineralogy and petrology : alteration and weathering processes; Mineralogy and petrology : hydrothermal systems; Hydrogarnet; Titanium; Alteration halo; Low temperature alteration; Oceanic basalt.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2093.pdf

Effects of inclustion and exposition times of sugar cane to calcium oxide on the physiologic and digestive parameters of Nellore heifers
Provedor de dados: 96
Autores: Pina,Douglas dos Santos; Valadares Filho,Sebastião de Campos; Azevêdo,José Augusto Gomes; Barbosa,Analívia Martins; Valadares,Rilene Ferreira Diniz; Detmann,Edenio.
It was aimed to evaluate the effect of inclusion and times of sugar cane exposition to whitewash on intake and total and partial digestibility of nutrients and ruminal parameters and to compare titanium dioxide and chromium oxide as markers to estimate fecal dry matter excretion and dry matter abomasal flow. It was used six rumen and abomasum cannulated Nellore females, with average body weight of 250 ± 19 kg, distributed in an incomplete 6 x 6 latin square design. The experiment was set in a 3 x 2 factorial scheme with three levels of whitewash (0; 0.5 or 1.0% natural matter) and two times of sugar cane storage (0 and 3 days). There was no effect of storage times neither interaction among levels of whitewash and storage times on the intake of nutrients....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cannulated; Chromium; Digestibility; Markers; Titanium.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000700026

A Novel Porous Diamond - Titanium Biomaterial: Structure, Microstructure, Physico-Mechanical Properties and Biocompatibility
Provedor de dados: 42
Autores: GUIMARÃES,ZULMIRA A.S.; DAMATTA,RENATO A.; GUIMARÃES,RENAN S.; FILGUEIRA,MARCELLO.
ABSTRACT With the aim of introducing permanent prostheses with main properties equivalent to cortical human bone, Ti-diamond composites were processed through powder metallurgy. Grade 1 titanium and mixtures of Ti powder with 2%, 5% and 10 wt% diamond were compacted at 100MPa, and then sintered at 1250°C/2hr/10-6mbar. Sintered samples were studied in the point of view of their microstructures, structures, yield strength and elastic modulus. The results showed that the best addition of diamonds was 2 wt%, which led to a uniform porosity, yield strength of 370MPa and elastic modulus of 13.9 GPa. Samples of Ti and Ti-2% diamond were subjected to in vitro cytotoxicity test, using cultures of VERO cells, and it resulted in a biocompatible and nontoxic composite...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomaterials; Titanium; Diamond; Sintering; Characterization; Biocompatibility.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000603111

BMP-2 and titanium particles synergistically activate osteoclast formation
Provedor de dados: 56
Autores: Sun,S.X.; Guo,H.H.; Zhang,J.; Yu,B.; Sun,K.N.; Jin,Q.H.
A previous study showed that BMP-2 (bone morphogenetic protein-2) and wear debris can separately support osteoclast formation induced by the receptor activator of NF-κB ligand (RANKL). However, the effect of BMP-2 on wear debris-induced osteoclast formation is unclear. In this study, we show that neither titanium particles nor BMP-2 can induce osteoclast formation in RAW 264.7 mouse leukemic monocyte macrophage cells but that BMP-2 synergizes with titanium particles to enhance osteoclast formation in the presence of RANKL, and that at a low concentration, BMP-2 has an optimal effect to stimulate the size and number of multinuclear osteoclasts, expression of osteoclast genes, and resorption area. Our data also clarify that the effects caused by the increase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone morphogenetic protein; Titanium; Osteoclasts; SMAD; RANKL.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000600461