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Amoxicillin (AMX), an antibiotic in the class of beta-lactam antibiotics has shown an ability of adsorption onto the economical, simple graphite pencil electrode (GPE) and could be electrochemical oxidation. The oxidation peak signal of AMX on the treated electrode is better than the one on the original GPE that is in agreement with the increase of redoxidation peaks of Fe(II)/Fe(III) system when using treated electrode. The square wave Voltammetric signals of AMX have exhibited a direct proportion to AMX concentrations in analytical solution with the correlation coefficient of 0.996. The limit of detection is 0.224 µM that is comparable with ones in many reported publications while GPE electrode is less complicated for fabrication.

Resistant starch is particularly concerned with beneficial effects in regulating blood glucose concentration and lipid metabolism, reducing the risk of diabetes and cardiovascular diseases. This study aimed to validate the effects of wheat starch acetate containing 32.1% resistant starch on postprandial blood glucose response and lipid profile on obesity, dyslipidemia Swiss mice induced by a high-fat diet. The result showed that there was a restriction on postprandial hyperglycemia and remained stable for 2 hours after meal efficiently comparing with the control group fed natural wheat starch. Simultaneously, when maintaining the dose of 5g/kg once or twice a day for 8 weeks, wheat starch acetate to be able to reduce body weight and blood glucose, triglyceride, cholesterol levels compared to the control group (p<0.05).

The synthesis of graphene (Gr) - gold (Au) nanoparticle (NP) composite was achieved using continuous ultraviolet wave exposure. The functional groups were investigated with FT-IR spectra. From the Raman spectra, D-band and G-band of graphene were identified. As a result, the uniform deposition of nanometer-sized Au NPs on the graphene sheets was observed from the field emission scanning electron microscope (FE-SEM) images. The photodegradation of methylene blue in aqueous solutions is studied using various photocatalysts, including neat TiO2, Gr/TiO2 and Gr-Au/TiO2 composites. The Gr weight ratio in this research is 2%. The Gr2%-Au0.1%/TiO2 composite had the highest photoactivity.