Search

While much is discussed of the challenges that educators and their institutions have been facing during COVID-19, there is little reported about how students have been coping with the challenges. In this short piece, we present preliminary data on university students' perceptions of online learning and teaching during the pandemic. Our findings from a student course satisfaction survey, conducted in two universities during the 2020 summer term (June through August), reveal that students have been more resilient than is often assumed. In light of these findings as well as the reflections of authors in a previous issue of "Distance Education," we will discuss some important implications for distance education scholarship.

Male Chinese loaches were exposed to 17β-estradiol (E2) and nonylphenol (NP) both singly and in combination for 42 days using semi-static waterborne exposure system. Plasma vitellogenin (Vtg) was chosen as determining endpoint. The results demonstrated that 0.5 μg/L E2 could induce the enhancement of Vtg contents in male Chinese loaches after exposure for 21 days, which showed a time-related increasing manner; NP was also estrogenic to male Chinese loach, and the vitelbogenic responses showed in a time- and dose-related manner, which was less potent than that of E2. The binary mixtures of E2 and NP can significantly elicit the production of Vtg in male Chinese loaches, which was more potent than that of individual compounds, and Vtg induced in the binary mixture groups was higher than the summation of Vtg induced in the corresponding single-compound groups at the same concentration. [ABSTRACT FROM AUTHOR]