Abidov Aziz

Comparative antioxidant and antimycobacterial activities of Opuntia ficus-indica fruit extracts from summer and rainy seasons

The antioxidant and antimycobacterial activities of Opuntia ficus-indica (OFI) fruit extracts were evaluated according to seasonal cultivation. The antioxidant activities of OFI extracts were assessed by different in vitro methods and the total phenolic and flavonoid contents were also examined. The antimycobacterial activity was measured against Mycobacterium tuberculosis strain H37Rv (ATCC 27294) by the microplate alamar blue assay method. In the antioxidant assay, methanol extracts of OFI in summer showed the highest antioxidant activity of all tested methods, and the lowest IC50 was observed in the 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay. Pearsons correlation coefficient was evaluated and the results from the extracts of summer and rainy season OFI were significantly correlated with the total phenolic and flavonoid contents. The methanol extracts of OFI in summer showed a high level of antimycobacterial activity against M. tuberculosis H37Rv, with a minimum inhibitory concentration of 50 µg ml−1. The results of this study suggest that OFI could be an important source of antioxidants as well as antimycobacterials against M. tuberculosis.

CO2 Adsorption of Metal Organic Framework Material Cu-BTC via Different Preparation Routes

In this work, Cu3(BTC)2 (Cu-BTC) metal organic framework (MOF), also known as HKUST-1, was prepared by 3 different synthetic route. The synthesized Cu-BTC materials were characterized by powder X-ray diffraction (XRD) for phase structure, scanning electron microscopy (SEM) for crystal structure, thermogravimetric analysis (TGA) for thermal stability, and nitrogen adsorption-desorption for pore textural structure. The results showed that the sample synthesized by microwave method has the high surface area and pore volume of 1721 m2g− 1 and 0.7424 cm3g− 1, respectively. Among the three synthetic methods, the sample synthesized by microwave method exhibited a CO2 uptake of 23.3% at 25 °C and ambient pressure.