Dampening Effects of Perceived Teacher Enthusiasm on Class-Related Boredom in College Students: Longitudinal Mediation Effects of Perceived Task Value.

This study aims to explore the longitudinal mediation effects of college students' perceived task value (PTV) between perceived teacher enthusiasm (PTE) and class-related boredom (CB). We conducted a longitudinal survey among college students from five colleges at the second (T1), sixth (T2), tenth (T3), and fourteenth week (T4) in a semester, and overall 1,371 students completed all the measurements. In the survey, a battery of questionnaires was used to measure the students' PTE, perception of task difficulty, perception of task value, and CB.

[Research on low-level Hg(II) removal from water by the heavy metal capturing agent].

Treatment of mercury containing wastewater using conventional approach is considered to be difficult to bring down its concentration to meet the discharge standard. In this study, we utilized dithiocarbamate (DTCR-2), 2,4,6-trimercaptotriazine(TMT-18B), Na2S and Ca(OH)2+ as the advanced treatment agents to remove low-level Hg2+ from water. Due to its better treatment effect, DTCR-2 was finally chosen as the most ideal option.