A facile electrochemical sensor based on single-walled carbon nanotubes/magnesium layered hydroxide-3-(4-methoxyphenyl) propionate nanocomposites paste electrode (MWCNT/MLH-MPP) for determination of bisphenol A (BPA) and uric acid (UA) was constructed in this study. According to experiments, several parameters affecting the electroanalytical responses of the prepared electrode were optimised, such as amount of modifier, square wave voltammetry parameters, and pH effect. Under optimum experimental conditions, electrochemical current of BPA and UA oxidation were linearly proportional to the concentrations from 3.0 ? 10?7 M to 1.0 ? 10?4 M and 1.0 ? 10?7 M to 1.0 ? 10?4 M for BPA and UA respectively with the both limit of detection of 5.0 ? 10?8 M. The small percentage of relative peak currents changes with added some interference indicated that the modified electrode can be used for the determination of BPA and UA in real samples such as baby teether and urine. ? 2021. The Authors. Publi.....

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Distance learning is the final alternative in realizing sustainable education during the Covid-19 period. The distance learning model will not face serious problems for areas that have a strong internet network, but distance learning will face various problems for areas that do not yet have an Internet Server Provider (ISP). Therefore, this study aims to reveal how the learning model was carried out during covid-19 in non-ISP areas, especially for Islamic religious education subjects. The research was conducted with a qualitative approach, data collection techniques were observation, interviews, and documentation studies. The results of the study are that Islamic religious education teachers in areas where there is no internet carry out distance learning through: first, learning plans are made according to the conditions when learning takes place remotely. Second, the implementation of distance learning in non-ISP areas is that teachers provide information on information boards in scho.....

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