نتایج جستجو برای: structuring scaffolds
تعداد نتایج: 33157 فیلتر نتایج به سال:
objective(s): in this study, the effect of electrospun fiber orientation on proliferation and differentiation of mesenchymal stem cells (mscs) was evaluated. materials and methods: aligned and random nanocomposite nanofibrous scaffolds were electrospun from polylactic acid (pla), poly (vinyl alcohol) (pva) and calcium carbonate nanoparticles (ncap). the surface morphology of prepared nanofibrou...
objective: the incidence of heart valve disease is increasing worldwide and the number of heart valve replacements is expected to increase in the future. by mimicking the main tissue structures and properties of heart valve, tissue engineering offers new options for the replacements. applying an appropriate scaffold in fabricating tissue-engineered heart valves (tehvs) is of importance since it...
In gradient scaffolds, changes in porosity, pore size or chemical composition occur gradually. Recently, different methods have been applied to create gradient in the scaffolds, but they have some disadvantages such as high cost and control. The main purpose of this research was to fabricate porous gradient scaffolds by a novel, functional, simple, and low-cost method. Two homogenous scaffolds...
This paper presents a general algorithm that performs basic mathematical morphology operations, like erosions and openings, with any arbitrary shaped structuring element in an efficient way. It is shown that our algorithm has a lower or equal complexity but better computing time than all comparable known methods.
Classical fuzzy mathematical morphology is one of the extensions of original binary morphology to greyscale morphology. Recently, this theory was further extended to interval-valued fuzzy mathematical morphology by allowing uncertainty in the grey values of the image and the structuring element. In this paper, we investigate the construction of increasing interval-valued fuzzy operators from th...
Introduction: Tissue engineering is the repair and replacement of damaged tissues and requires a combination of cells, growth factor and porous scaffolds. Scaffolds, as one of the main components in tissue engineering, are used as a template for tissue regeneration and induction and guidance of growth of the new and biologically active tissues. An ideal scaffold in tissue engineering, imitating...
objective: assessments of cell reactions such as motility, orientation and activation to the topography of the substratum will assist with the fabrication of a proper implantable scaffold for future tissue engineering applications.the current challenge is to analyze the orientation effect of elecrospun nanofibers of poly (ε-caprolactone) (pcl) on viability and proliferation of mouse embryonic s...
Tissue-engineering scaffolds provide biological and mechanical frameworks for cell adhesion, growth, and differentiation. Nanofibrous scaffolds mimic the native extracellular matrix (ECM) and play a significant role in formation and remodeling of tissues and/or organs . One way to mimic the desired properties of fibrous ECM is adding nanoparticles into the polymer matrix. In the current study, ...
objective: nowadays, as the field of neural tissue engineering advances, the fabrication and application of combined structures open a new window of research for the regeneration of nervous system injuries. in this study, chitosan/poly(vinyl alcohol)-carbon nanotube nanocomposites has been exploited as scaffolds. materials and methods: electrospinning was used to fabricate chitosan/poly(vinyl ...
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