Consulta: subjectFacets:"Biomimetic"
Registros recuperados: 4
Data/hora: 09/06/2024 07:38:36

Exopolysaccharides produced by bacteria isolated from deep-sea hydrothermal vents: new agents with therapeutic potential
Provedor de dados: 5
Autores: Colliec-jouault, Sylvia; Zanchetta, P; Helley, D; Ratiskol, Jacqueline; Sinquin, Corinne; Fischer, A. M.; Guezennec, Jean.
Bacterial polysaccharides offer fascinating potential applications for the pharmaceutical industry. Although many known marine bacteria produce exopolysaccharides (EPS), continuation in looking for new polysaccharide-producing micro-organisms is promising. Marine bacteria, isolated from deep-sea hydrothermal vents, have demonstrated their ability to produce in aerobic conditions, unusual EPS. With the aim of discovering biological activities, EPS presenting different structural features were studied. An EPS secreted by Vibrio, diabolicus was evaluated on the restoration of bone integrity in experimental model and was demonstrated to be a strong bone-healing material. Another EPS produced by Alteromonas infernus was modified in order to obtain new...
Tipo: Text
Palavras-chave: Hydrothermal vents; Exopolysaccharides; Bone healing; Biomimetic; Anticoagulant activity; Sources hydrothermales; Exopolysaccharide; Cicatrisation osseuse; Biomimétique; Activité anticoagulante.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-2117.pdf

Design a biomimetic disc using geometric features of the claws
Provedor de dados: 111
Autores: Dehghan Hesar, Hadi; Kalantari, Davood.
This study presents a numerical investigation regarding the stress distribution on the new designed disc harrow using the ANSYS software. A conventional disc, notched disc, and a biomimetic design inspired by the claw of the leatherwing were analyzed in two conventional plowed and unplowed soils and three tillage depths (4, 7 and 10 cm). Stress analysis for all treatments showed that the highest stress was imposed at the disc-stem junction. Meanwhile the highest deformation occurred at the lowest and the most external part of the discs (land line). The results obtained in this study indicated that the maximum stress exerted from tilling soil to discs increases linearly with tillage depth in both plowed and unplowed soils. Given these results, the maximum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stress; Disk harrow; Finite element; Resistance; Biomimetic.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3561

Preparation and evaluation of a biomimetic scaffold with porosity gradients in vitro
Provedor de dados: 42
Autores: Wang,Qianbin; Wang,Qiguang; Wan,Changxiu.
A novel biodegradable scaffold based on mimetic a natural bone tissue morphology with a porosity gradient structure was prepared in this paper. The result of surface morphology indicated that a graded porous structure was formed in the fabricated scaffold, where the dense layer (0%) was connected with the most porous layer (60%) by a middling porous layer (30%). To evaluate the degradability, graded porous scaffolds compared with homogeneous scaffolds were placed into a Tris-HCl buffer solution (pH = 7.4) for 28 days. It was found that both scaffolds presented the same degradation trend, and the graded porous structure did not change the original degradability of the scaffold. Moreover, the compressive strength of the graded porous scaffold was better than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodegradable; Biomimetic; Graded porous scaffold; Compressive strength.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100003

Nanofibrous Scaffolds for Tissue Engineering Applications
Provedor de dados: 52
Autores: Jaiswal,Amit.
The discipline of tissue engineering opens up the ways for repair and regenerate damaged organs and tissues. In the current work biomimetic nanofibrous scaffolds were fabricated by electrospinning. Poly-L-lactic acid (PLLA) was blended with collagen and gelatin to fabricate PLLLA-collagen and PLLA-gelatin fibrous scaffolds respectively. Pure PLLA and gelatin scaffolds served as controls. All the scaffolds displayed randomly oriented smooth fibers studied by SEM. Surface topography and roughness were studied by AFM and surface contact angle was also measured for all the fabricated scaffolds. Surface roughness was found to be higher in collagen and gelatin blended scaffolds in comparison to PLLA scaffold. Blending of collagen and gelatin reduced the surface...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electrospinning; Biomimetic; Tissue Engineering.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100602