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    Synthesis, Adsorption, and Recognition Properties of a Solid Symmetric Tetramethylcucurbit[6]uril-Based Porous Supramolecular Framework by Fei-Yang Tian, Rui-Xue Cheng, Yun-Qian Zhang, Zhu Tao, Qian-Jiang Zhu

    Published 2020-01-01
    “…In this work, we reported a porous supramolecular framework (A) constructed of a symmetric tetramethylcucurbit[6]uril (TMeQ[6]) in aqueous HCl solutions; the driving force was the outer surface interaction of cucurbit[n]urils, as well as hydrogen bonding between latticed water molecules and portal carbonyl oxygens of TMeQ[6]. …”
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    Attitudes toward mathematics and virtual teaching of students in the context of COVID-19: validation and reliability of instruments by Isis Schmitt-Cerna, Maritza Ramírez-Olascuaga, Wendy Arhuis-Inca, Miguel Ipanaqué-Zapata, Sarai Raquel Arhuis-Inca, Janina Bazalar-Palacios

    Published 2024-10-01
    “…The present study aims to evaluate the psychometric properties of the instruments of attitudes toward mathematics and the perception of virtual teaching during COVID-19 in high school students in Peru.MethodsA total of 400 students participated. The research utilized exploratory and confirmatory factor analyses to evaluate the attitudes mathematics and the perception of virtual teaching instruments’ structure, and assessed reliability through Cronbach’s Alpha (α), Ordinal Alpha (ordinal α), and Omega (Ω) indicators.ResultsExploratory factor analysis showed that Model 2, with factor loadings above 0.40, was the most suitable for both instruments. …”
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