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- W2901781653 abstract "The novel Ca-zeolite/poly(amino acid) (CaY/PAA) composites for bone substitute applications with hemostatic activity were prepared using the in situ melting polymerization method. In this study, Ca-zeolite (CaY) loaded with Ca2+ was obtained from Y-type zeolite (NaY) by ion-exchange method. The properties of the CaY/PAA composites and PAA, including composition, structure, compressive strength, in vitro degradability in phosphate-buffered solution (PBS), bioactivity, cytocompatibility and in vitro coagulation tests were characterized and investigated. The results showed that compressive strength of the CaY/PAA composites ranged from 145 to 186 MPa, demonstrating sufficient mechanical strength for load-bearing bone substitute. After soaking in PBS for 16 weeks, the weight loss of 25CaY/PAA and 50CaY/PAA were 4.1 and 1.6 wt%, respectively, and the pH values for CaY/PAA composites increased to about 8.0 in 2 weeks and then gradually stabilized around 7.4, indicating good stability in PBS. Scanning electron microscope and energy dispersive spectrometer results showed that the composites were bioactive and new apatite layers attached on their surfaces. Mesenchymal stem cells (MSCs) exhibited high-proliferation in the extract solution of the CaY/PAA composites and were well spread on the surfaces of the composites. Cells on the CaY/PAA composite groups showed higher alkaline phosphatase (ALP) activity indicating the potential to promote cell differentiation. The in vitro coagulation tests showed that CaY/PAA composites have shorter clotting time and better performance of promoting blood coagulation than other samples, presenting improved hemostatic activity. In summary, the results demonstrated that the CaY/PAA composites had good mechanical strength, stability, bioactivity, cytocompatibility and hemostatic activity for bone substitute applications." @default.
- W2901781653 created "2018-11-29" @default.
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- W2901781653 date "2018-11-02" @default.
- W2901781653 modified "2023-09-26" @default.
- W2901781653 title "Developing novel Ca-zeolite/poly(amino acid) composites with hemostatic activity for bone substitute applications" @default.
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- W2901781653 doi "https://doi.org/10.1080/09205063.2018.1521688" @default.
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