نتایج جستجو برای: scaffold
تعداد نتایج: 23923 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...
Background and purpose: One of the recent techniques for increasing the output of cryopreservation is using different scaffolds in long-term preservation of stem cells for cell therapy. Undesirable differentiation and decrease in the number of viable cells are two major problems in this process. In order to overcome these problems, in this study the human amniotic epithelial cells were cryopres...
In this work, poly (hydroxybutyrate co hydroxyvalerate) (PHBV) composite nanofibrous scaffold containing hydroxyapatite/bredigite (HABR) nanoparticles was fabricated through electrospining method. The morphology of prepared nanofibers and the state of the nanoparticles dispersion in nanofiber matrix were investigated using scanning and transmission electron microscopy, respectively. ...
Background & Aim: The use of bone scaffolds is one of the new and efficient techniques for repairing bone defects that provide a suitable platform for cell proliferation and growth to repair the target tissue. One of the most important causes of failure of transplants and surgical procedures is the invasion of bacteria at the site of the complication and the development of severe infection. The...
spinal cord injury (sci) results in the damage of motor and sensory pathways. the molecular and cellular structure of the injury milieu has been shown to be vital for endogenous regeneration in most tissues. regeneration of injured central nervous system (cns) is limited by damaged cell environment. biomaterial scaffolds can reconstruct injured cns tissue following sci by promoting the migratio...
Introduction: Poly lactic co- glycolic acid (PLGA) and poly caprolacton (PCL) are highly applicable polymers in the field of drug delivery and tissue engineering scaffolds. Therefore, this study aimed to design an insulin-loaded PCL/PLGA hybrid nanofiber scaffold in order to be applied in attachment and growth of chondrocytes. Moreover, it can provide a vehicle for the controlled release of a...
Introduction: The need for biocompatible and bioactive scaffolds to accelerate the regeneration and repair of fractured bones has been considered for bone tissue engineering applications during recent decades. The new methods were developed to produce scaffolds to improve the tissue quality, size of cavities, control the porosity and increase the scaffold compressive strength u...
There are two main methods for preparing the PuraMatrix (PM) as a three-dimensional (3-D) scaffold for supporting the cells including surface plating and encapsulation. In the surface-plating procedure, the scaffold is created by adding an ionic agent such as medium to PM. After adjusting the PH by changing the medium, cells are seeded on top of the scaffold. In the encapsulation method, PM and...
Children use imitation flexibly to acquire the instrumental skills and conventions of their social groups. This study (N=69 parent and 3- to 6-year-old child dyads) examined the impact of instrumental versus conventional language on (a) children's imitative flexibility in the context of parent-child interaction and (b) how parents scaffold children's imitation. Children in dyads presented with ...
In this study, using biodegradable polymers, nanofiberouse scaffolds were fabricated from the layer-by-layer electrospinning method, including two layer that poly (ε-caprolactone), polyvinylpyrrolidone deposited at first layer and poly (ε-caprolactone), polyvinyl alcohol , β-tricalcium phosphate at latter. After prepration of scaffolds, scanning electron microscopy (SEM), swelling, porosity, me...
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