Search

Oral infection of mice with several strains of Toxoplasma gondii results in intestinal pathological lesions, which contributes to the invasion of this parasite. However, the exact mechanism is unclear, and only a few strains have been explored. Here, T. gondii TgSheepCHn5 and TgRedpandaCHn1 strains from sheep and red panda were evaluated. The TgSheepCHn5 and TgRedpandaCHn1 strains induced intestinal lesions, loss of Paneth cells, and gut commensal bacteria dysbiosis in Swiss Webster mice. The lesions and loss of Paneth cells were dependent on IFN-γ and gut commensal bacteria during T. gondii infection. Deleting IFN-γ or gut commensal bacteria suppressed the Th1 immune response, alleviated the lesions and parasite loading, and upregulated the number of Paneth cells. Loss of IFN-γ production accelerated mice death, whereas the deletion of gut commensal bacteria enhanced the survival time of the host. The Th1 cell immune responses have positive and negative effects on toxoplasmosis, resistance to T. gondii infection, and acceleration intestine lesions. Adjustment of Th1 cell responses and gut commensal bacteria may be effective treatments for toxoplasmosis. [ABSTRACT FROM AUTHOR]

Using ammonium chloride as a chlorination agent, indium in waste liquid-crystal display panels was successfully extracted by microwave-assisted chloride metallurgy under vacuum pressure. The optimal conditions for indium extraction from pure indium oxide were explored through single-factor and orthogonal experiments, achieving an indium extraction ratio of 98.91% when the temperature was 500°C, the Cl/In molar ratio was 8, and the heating duration was 3 min for pure In2O3. The Cl/In molar ratio exhibited the most important effect on the indium extraction ratio, followed by the heating temperature and duration. When extracting indium from waste liquid-crystal display panel powder (–13 µm) after ball milling, the indium extraction ratio was nearly 79.46% when using an ammonium chloride mass ratio of 0.6 wt.%, temperature of 500°C, and heating duration of 3 min. Excess gaseous hydrogen chloride reacts with ammonia to form ammonium chloride during the condensation, thereby avoiding emission of hydrogen chloride into the environment. The results of this work indicate that this technology represents a promising option for the extraction of indium from waste liquid-crystal display panels with a very short heating duration and relatively low chlorination agent loss, as well as no harmful gas emissions. [ABSTRACT FROM AUTHOR]