4 articles for “Mehdi Najari”

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Research ArticleOpen accessIn the author namesSynergistic Effect of Insulin on in vitro Development of Immature Bovine OocytesMojtaba Dashtizad, Abd Wahid Haron, Rosnina Yusoff et al.Problem statement: Development of efficient culture system to support embryonic development would be valuable when quality of produced embryos was important. However, the rate of bovine embryo production in vitro was still lower than expected. Present study, including of three experiments, was carried out to investigate the effect of insulin on nuclear maturation and subsequent development of immature bovine oocytes … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 4 · 31 Dec 2010 · 10,438 accessesView PDF Cite

Research ArticleOpen accessIn the author namesComparison between Brain Tissue Gray and White Matters in Tension Including Necking PhenomenonSina Mehdizadeh, Mehdi Khoshgoftar, Siamak Najarian et al.Characterizing the differences between the mechanical properties of brain tissue gray and white matters is of importance in biomechanics of brain tissue and may find a variety of different applications in medicine. In this study, a comparison has been made between mechanical behavior of bovine brain tissue white and gray matters. Through a linear elastic theory and using Bridgman method, … …American Journal of Applied Sciences, Vol. 5, Issue 12 · 31 Dec 2008 · 6,843 accessesView PDF Cite

Research ArticleOpen accessIn the author namesFabrication of a Capacitance-Based Tactile Sensor with Biomedical ApplicationsAli Tavakoli Golpaygani, Siamak Najarian, M. Mehdi Movahedi, Goldis Darb EmamiehThe design, modeling, and testing of a flexible tactile sensor and its applications are presented. This sensor is made of polymer materials and can detect the 2D surface texture image and contact-force estimation. The sensing mechanism is based on the novel contact deflection effect of a membrane. We measure the amount of membrane deflection with measuring the change of capacitance … …American Journal of Applied Sciences, Vol. 5, Issue 2 · 28 Feb 2008 · 7,394 accessesView PDF Cite

Research ArticleOpen accessIn the author namesA Biomechanical Composite Model to Determine Effective Elastic Moduli of the CNS Gray MatterMehdi Khoshgoftar, Siamak Najarian, Farhad Farmanzad et al.Brain tissue is a heterogeneous material with complicated microstructural features. Models based on microstructure can lead to more accurate and physically realistic predictions of mechanical characteristics of brain tissue. A two-step Mori-Tanaka/Voigt homogenization procedure is implemented into a 3D microstructurally-based multi-phase composite model, composed of randomly-oriented elastic axons, dendrites and neuronal cell bodies surrounded by an elastic matrix. The effects … …American Journal of Applied Sciences, Vol. 4, Issue 11 · 30 Nov 2007 · 7,777 accessesView PDF Cite