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In this research, ultra-performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (UPLC-ESI-Q-TOF-MS/MS) was used for detection and identification of the absorptive constituents and their metabolites in rat plasma, urine and feces following oral administration of Ziziphi Spinosae Semen alcohol extract. After structure elucidation, a total of 12 compounds in rat plasma, comprising seven prototypes and five metabolites, 28 compounds in urine, comprising 17 prototy

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This study utilized growth curves and change models to understand the impact of student perceptions of teacher caring on the development of math motivation for an ethnically and linguistically diverse sample of adolescents in middle school (N = 1926) and high school (N = 1531). Using an expectancy-value framework, growth curves revealed declining math motivation for both middle school and high school cohorts. However, perceived teacher caring buffered against these declines and was positively associated with math self-efficacy and subje