Consulta: subjectFacets:"Diamond"
Registros recuperados: 3
Data/hora: 07/06/2024 08:49:54

Garnets from the Camafuca-Camazambo kimberlite (Angola)
Provedor de dados: 42
Autores: Correia,Eugénio A.; Laiginhas,Fernando A.T.P.
This work presents a geochemical study of a set of garnets, selected by their colors, from the Camafuca-Camazambo kimberlite, located on northeast Angola. Mantle-derived garnets were classified according to the scheme proposed by Grütter et al. (2004) and belong to the G1, G4, G9 and G10 groups. Both sub-calcic (G10) and Ca-saturated (G9) garnets, typical, respectively, of harzburgites and lherzolites, were identified. The solubility limit of knorringite molecule in G10D garnets suggests they have crystallized at a minimum pressure of about 40 to 45 kbar (4-4.5 GPa). The occurrence of diamond stability field garnets (G10D) is a clear indicator of the potential of this kimberlite for diamond. The chemistry of the garnets suggests that the source for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Kimberlite; Diamond; Garnet; Lherzolite; Harzburgite.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000200010

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

Rhomboid cutaneous flap for defect correction after resection of trichoblastoma on dogs' face
Provedor de dados: 65
Autores: Araújo,Priscilla Bartolomeu de; Bonelli,Marília de Albuquerque; Campinho,Daniela da Silva Pereira; Souza,José Cláudio de Almeida; Coelho,Maria Cristina de Oliveira Cardoso.
ABSTRACT: Surgical excision of neoplasms usually requires a large incision with safety margin, resulting in large cutaneous defects. Skin flaps permit closure of extensive cutaneous defects that would not be closed directly. The rhomboid cutaneous flap can be used in places of the body where a rhomboid defect with internal angles of 60 and 120 degrees can be made. The aim of this paper is to report the her use for reconstruction of the defect created after resection of a tumor on dogs' face . Total removal of the tumor and a safety margin was performed, and then the surgical defect was reconstructed with a rhomboid cutaneous flap. The final result was satisfactory, with an esthetically and functional acceptable scar, a without deformities to the oral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhomboid; Diamond; Lozenge; Plasty.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601059