The aim of the study was to investigate a porous nanohydroxyapatite/polyamide 66 (n-HA/PA66) scaffold material that was implanted into muscle and tibiae of 16 New Zealand white rabbits to evaluate the biocompatibility and osteogenesis and osteoinductivity of the materials in vivo. The samples were harvested at 2, 4, 12 and 26 weeks respectively, and subjected to histological analysis. At 2 week...

Nano-hydroxyapatite/polyamide 66 (nHA/PA66) porous scaffolds were fabricated by a phase inversion method. Carbon nanotubes (CNTs) and silk fibroin (SF) were used to modify the surface of the nHA/PA66 scaffolds by freeze-drying and cross-linking. Dexamethasone was absorbed to the CNTs to promote the osteogenic differentiation of bone mesenchymal stem cells (BMSCs). The cell viability of BMSCs wa...

Nano Al₂O₃ polyamide composites are evaluated for processing by selective laser sintering. A thermal characterization of the polymer composite powders allowed us to establish the possible initial settings. Initial experiments are conducted to identify the most suitable combinations of process parameters. Based on the results of the initial trials, more promising ranges of different process para...

The present paper presents a new multi-?G control approach to perform mode I fatigue crack growth tests using several constant cyclic energy release rate ranges (?G) on only one specimen. It was successfully applied carbon/polyamide 6 unidirectional composite specimens. After validation checks the approach, results show that propagation behaviour exhibits three different regimes can be accurate...

The objective of this research is to study antibacterial and antistatic properties polyamide yarn which coated silver nanoparticles carboxymethylstarch (CMS). Silver were synthesized by a green synthesis method onto (PA) fibers. presence nanosilver yarns was confirmed scanning electron microscope (SEM), UV–visible spectra (UV-Vis) X-ray diffraction (XRD) techniques. concentration deposited on t...

BACKGROUND Repetitive endothelial damage from dialysis membrane incompatibility is a probable cause of accelerated atherosclerosis in haemodialysis patients. Consequently pulse wave velocity (PWV), a measure of arterial stiffness, was utilized as a surrogate marker of vascular dysfunction during dialysis with two commonly used synthetic dialysers. METHODS PWV was monitored before, during and ...

The zinc finger protein EVI1 is causally associated with acute myeloid leukemogenesis, and inhibition of its function with a small molecule therapeutic may provide effective therapy for EVI1-expressing leukemias. In this paper we describe the development of a pyrrole-imidazole polyamide to specifically block EVI1 binding to DNA. We first identify essential domains for leukemogenesis through str...

The principal intention of this work is to fabricate and characterize the polyamide/chitosan nanocomposite by a novel single solvent method through electrospinning procedure. thermal properties morphology prepared are studied thermogravimetric analysis (TGA) field-emission scanning electron microscopy (FE-SEM). TGA exposed that primary decomposition temperature reduced with rising chitosan cont...

The objective of this research is to tailor composites with continuous bamboo fibers as reinforcement a bio-based polyamide (RilsanXD). Using mild chemical and mechanical treatment, technical were extracted from Phyllostachys viridiglaucescens. They have an average diameter 397 µm. Their tensile strength 323 MPa, their Young modulus 26 GPa. Single ply fibers/polyamide processed. Gravimetric ana...

A mussel-inspired interlayer of polydopamine (PDA)/polyethylenimine (PEI) is codeposited on the ultrafiltration substrate to tune the interfacial polymerization of piperazine and trimesoyl chloride for the preparation of thin-film composite (TFC) nanofiltration membranes (NFMs). This hydrophilic interlayer results in an efficient adsorption of piperazine solution in the substrate pores. The sol...