The contamination of water and food in agricultural areas, where an enormous volume of pesticides is widely employed to enhance crop production, is a challenging reality. The rapid assessment of these contaminants is fundamental to assure water and food quality and safety, particularly for local community members. This work presents a nonexpensive and easy-operational paper-based testing device for the fast detection of insecticides (carbamates and organophosphates) in water samples. The structural design “dip-and-fold” allows us to carry out the analysis without introducing reagents or samples. The device is prepared using different high-quality papers to support the active acetylcholinesterase (AChE) and the customized chemical formulation for colorimetric detection. The chemical principle is based on the AChE inhibition reaction and Ellman’s method. The experiments using standard solutions of carbofuran, propoxur, and chlorpyriphos indicated satisfactory detection at concentrations between 0.1 and 0.0001 mM, and the color results are revealed within 10 min. Therefore, this technique represents a promising alternative for implementing low-cost and efficient water monitoring and management solutions.
Com o propósito de incentivar mais mulheres a entrarem em ramos de engenharia e computação, este trabalho apresenta a experiência de alunas de graduação da UFMT e de professoras orientadoras em um projeto de iniciação científica que possui uma grande quantidade de pesquisadoras mulheres em seu desenvolvimento e que tem como objetivo construir a segunda versão do robô Otto, um brinquedo terapêutico que serve como intermediador em terapias com crianças autistas, trazendo cada passo percorrido para o desenvolvimento acadêmico e profissional das alunas e professoras, além de cada obstáculo enfrentado, mostrando que apesar das adversidades é possível sim ser uma mulher que atua em áreas relacionadas a tecnologia.
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