THE COMPARISON BETWEEN STUDENTS' PHYSICS LEARNING OUTCOMES IN FACE TO FACE (OFFLINE) AND ONLINE LEARNING MODEL

This study aims to compare the learning outcomes of physics taught using face-to-face learning models with online learning models at Islamic Senior High School 2 Palu City in the academic year of 2021/2022. In this study, the X1 variable consists of the face-to-face model, the X2 variable is the online learning model, and the Y variable consists of the results of learning Physics. This study used quantitative research with comparative analysis techniques. The subject of the research was students of X IPA 1 at Islamic Senior High School 2 Palu, which is totaling 25 students. Data collection was carried out using student learning outcomes tests, observation, and documentation. The method used for the analysis of hypothesis testing is the paired sample t-test. Descriptive, normality, and homogeneity tests were used for data analysis. The results showed that there were significant differences in the learning outcomes of Physics subjects between face-to-face learning and the online learning model for class X IPA1 Islamic Senior High School 2 Palu in the academic year of 2021/2022. The results of the descriptive analysis calculation show that there is a difference between the Physics Learning Outcomes Taught Using the Face-to-Face Learning Model and the Online Learning Model in class X IPA1 in the academic year 2021/2022. This shows that the face-to-face learning model is more effective than the online learning model in physics subjects.

Antibacterial Activity of Tetracycline Based Gold Nanoparticles

Recent interest in nanomedicine is justified, as synthetic antioxidants and antibiotics suffer from several drawbacks. These nanomedicines have been shown to possess health promoting properties, and they exert no selective physiological pressure on the pathogens that can result in development of drug resistance. Tetracycline stabilized gold nanoparticles (Tet-Au(0) NPs) were combined by using chloroauric acid (HAuCl4) with the assistance of tetracyclineby using a facile method. The Tet-Au(0) NPs were observed by UV-Vis absorption spectroscopy, which inveterate the formation of gold nanoparticles by stimulating the characteristic surface Plasmon absorption maxima at 515 nm. While the confirmation of bonding of specific tetracycline with gold metal exhibited, the formation of gold nanoparticles was verified by fourier-transform infrared spectroscopy (FT-IR). X-ray powder diffraction (XRD) confirmed the crystalline nature of synthesized Au (0) NPs.The standard condition employed for the optimization of this experiment. The effects of Tet-Au(0) NPs were checked on Salmonella typhimurium (S. typhimurium). Well diffusion method was used to check the antibacterial activity on S. typhimurium, and inhibition zone was measured in mm to check capability of the Tet-Au(0) NPs. The results were compared with standard tetracycline and gold ions. The antibacterial results revealed that newly synthesized (Tet-Ag(0) NPs) had a great remarkable activity against Salmonella typhimurium. These findings could pave the way for finding the changing behavior associated with other antibiotics after capping AuNPs or other metal nanoparticles and may be used against other resistant strains.