Benefits and Drawbacks of Online Teaching Reading in the Post-COVID-19 Era

The study is based on the research which attempted to investigate the benefits and drawbacks of online teaching reading in the post-COVID-19 era. The objectives of the study were (1) to find out the benefits and drawbacks of online teaching reading in the post-COVID-19 and (2) to find out how the English teacher implements online teaching reading in the post-COVID-19. The researchers selected the VII B class consisting of 21 students and one English teacher of SMP Muhammadiyah 9 Gemuh as the research subjects. This study is qualitative research with a case study as a research method. The instruments of this study were a questionnaire, interviews, and observation. The study revealed that online teaching reading in the post-COVID-19 era had several benefits such as improving students’ engagement, improving students’ understanding, providing a variety of reading materials, and increasing the teacher’s creativity. Besides, the drawbacks faced by the students were unstable internet connectivity, financial issue, and inability to manage time. In addition, the results of the observation and interview showed that the English teacher at SMP Muhammadiyah 9 Gemuh applied a hybrid type of online teaching using four online learning platforms such as Kahoot!, QuizWhizzer, WhatsApp Group, and Google Classroom

Binary mixtures of ionic liquids in aqueous solution: towards an understanding of their salting-in/salting-out phenomena

The order of the salting-in or salting-out inducing ability of ions on the aqueous solubility of macromolecules in aqueous solutions is known as the Hofmeister series. Taking into account that ionic liquids (ILs) are constituted by ions, they can exert similar effects on the solubility of other ILs in aqueous media. In order to expand the knowledge on the salting-in/-out ability of ILs, experimental studies on the solubility of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonylimide) in water in presence of other IL/salts were conducted at 298.15 K at atmospheric pressure. Both the impact of the anion and cation of the IL were evaluated with the following ILs/salts: 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium hydrogensulfate, cholinium bis(trifluoromethylsulfonyl)imide, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and lithium bis(trifluoromethylsulfonyl)imide, in a wide composition range. As happens with common salts, both salting-in and salting-out effects exerted by ILs were observed, with a higher impact exerted by the IL anion on the salting-out phenomenon. These data allow to better understand the ILs impact when designing liquid-liquid separation processes.publishe