13 research outputs found
Chemistry, structures, and advanced applications of nanocomposites from biorenewable resources
Researchers have recently focused on the advancement of new materials from biorenewable and sustainable sources because of great concerns about the environment, waste accumulation and destruction, and the inevitable depletion of fossil resources. Biorenewable materials have been extensively used as a matrix or reinforcement in many applications. In the development of innovative methods and materials, composites offer important advantages because of their excellent properties such as ease of fabrication, higher mechanical properties, high thermal stability, and many more. Especially, nanocomposites (obtained by using biorenewable sources) have significant advantages when compared to conventional composites. Nanocomposites have been utilized in many applications including food, biomedical, electroanalysis, energy storage, wastewater treatment, automotive, etc. This comprehensive review provides chemistry, structures, advanced applications, and recent developments about nanocomposites obtained from biorenewable sources
Chronic and Acute Water-Soluble Microplastics Uptake and Effects on Growth and Reproduction of Daphnia magna
Titanium dioxide-multiwalled carbon nanotube/polyimide composite film modified electrodes for simultaneous voltammetric detection of ascorbic acid, uric acid and dopamine as biomarker molecules
Chronic and Acute Water-Soluble Microplastics Uptake and Effects on Growth and Reproduction of Daphnia magna
Titanium dioxide-multiwalled carbon nanotube/polyimide composite film modified electrodes for simultaneous voltammetric detection of ascorbic acid, uric acid and dopamine as biomarker molecules
Effects of Yttrium Doping on Erbium-Based Hydroxyapatites: Theoretical and Experimental Study
This is the first investigation of yttrium (Y) and erbium (Er) co-doped hydroxyapatite (HAp) structures, conducted using theoretical and experimental procedures. By using a wet chemical method, the materials were synthesized by varying the concentration of Y amounts of 0.13, 0.26, 0.39, 0.52, 0.65, and 0.78 at.% every virtual 10 atoms of calcium, whereas Er was kept fixed at 0.39 at.%. Spectroscopic, thermal, and in vitro biocompatibility testing were performed on the generated samples. Theoretical calculations were carried out to compute the energy bandgap, density of states, and linear absorption coefficient. The effects of Y concentration on thermal, morphological, and structural parameters were investigated in detail. Raman and Infrared (FTIR) spectroscopies confirmed the formation of the HAp structure in the samples. Theoretical investigations indicated that the increasing amount of Y increased the density from 3.1724 g cm−3 to 3.1824 g cm−3 and decreased the bandgap energy from 4.196 eV to 4.156 eV, except for the sample containing 0.39 at. % of the dopant, which exhibited a decrease in the bandgap. The values of linear absorption appeared reduced with an increase in photon energy. The samples exhibited cell viability higher than 110%, which revealed excellent biocompatibility for biological applications of the prepared samples
Preparation of the L-Asparaginase-Based Biosensor With Polyimide Membrane Electrode for Monitoring L-Asparagine Levels in Leukemia
Design of Xylose-Based Semisynthetic Polyurethane Tissue Adhesives with Enhanced Bioactivity Properties
Developing biocompatible tissue adhesives
with high adhesion properties is a highly desired goal of the tissue
engineering due to adverse effects of the sutures. Therefore, our
work involves synthesis, characterization, adhesion properties, protein
adsorption, <i>in vitro</i> biodegradation, <i>in vitro</i> and <i>in vivo</i> biocompatibility properties of xylose-based
semisynthetic polyurethane (NPU-PEG-X) bioadhesives. Xylose-based
semisynthetic polyurethanes were developed by the reaction among 4,4′-methylenebis(cyclohexyl
isocyanate) (MCI), xylose and polyethylene glycol 200 (PEG). Synthesized
polyurethanes (PUs) showed good thermal stability and high adhesion
strength. The highest values in adhesion strength were measured as
415.0 ± 48.8 and 94.0 ± 2.8 kPa for aluminum substrate and
muscle tissue in 15% xylose containing PUs (NPU-PEG-X-15%), respectively.
The biodegradation of NPU-PEG-X-15% was also determined as 19.96 ±
1.04% after 8 weeks of incubation. Relative cell viability of xylose
containing PU was above 86%. Moreover, 10% xylose containing NPU-PEG-X
(NPU-PEG-X-10%) sample has favorable tissue response, and inflammatory
reaction between 1 and 6 weeks implantation period. With high adhesiveness
and biocompatibility properties, NPU-PEG-X can be used in the medical
field as supporting materials for preventing the fluid leakage after
abdominal surgery or wound closure