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The concern about waste in the world is growing because of the significant environmental impact. Therefore, new alternatives are used, such as recycling, biodegradable polymer, agroindustry waste reuse, and many others. In this sense, this paper proposes a production of new bio-packing based on the waste production from agriculture (sugarcane bagasse) and the drinking industry (plastic bottles from Polyethylene Terephthalate (PET)) for agriculture products transportation. Then, this new material was characterized by thermal, chemical, morphological, mechanical, antifungal activity, and hydrophobic character to evaluate its characteristics to use as bio-packing. Following this purpose, all samples are characterized in nature and after production by scanning electron microscopy analysis (SEM), thermogravimetric analysis (TG), infrared spectroscopy analysis (FTIR), surface angle contact, mechanical properties, and antifungal activity. The results indicated that the sample with 15% of bagasse presents the best mechanical properties. In addition, the presence of porosity can provide the material with low thermal conductivity. Moreover, the antifungal activity indicates that inhibition of fungus micellar growth was proportional to the decrease of bagasse in bio-packing. Then, which offers an innovative strategy for the use of waste in the production of environmentally friendly packing.
Background and objective: Despite the situation in the north of Minas Gerais being semiarid, this region presents a plant with low water demand, Calotropis procera. This plant has a great potential as an antifungicide supply, although other important characteristics. In this context, this research proposes an extraction of natural material from C. procera to produce a bio-packing for agriculture and anticorrosive applications as a sustainable alternative. This biopacking is eco-friendly, low-cost, widely available, and quickly produced. The antifungicide and anticorrosive activity were evaluated as the control of fruit ripening based on in vivo tests. Materials and methods: This research is based on the production of bio-packing based on natural extracts from C. procera seeds for agricultural and anticorrosive applications. The material was characterized by Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR) and surface contact angle. In addition, in vitro and in vivo biological experiments were performed to analyze the antifungal activity and control of fruit ripening. Moreover, the anticorrosive property was also analysed. Results: The results indicated the presence of proteins in the composition of the product based on natural extract, which may contribute to the antifungal and anticorrosive characteristics. Furthermore, the natural extract demonstrated anticorrosive protection in simulated seawater. The in vivo analysis of bananas showed that the extract concentration of 50 μL mL-1 presented the best results, controlling the fruit ripening and protecting against diseases. Conclusion: Thus, for the first time, these products extracted from C. procera seeds presented a great future for applications as a versatile action for agriculture and anticorrosive applications.
Objetivo: Relatar a experiência vivenciada a partir do projeto “Covid-19: Conhecendo para se prevenir”, desenvolvido por discentes, docentes e técnicos administrativos da UFVJM. Método: Foi ofertado à comunidade interna e externa à UFVJM um curso online, gratuito, sobre vários aspectos da Covid-19. Resultado: Obteve-se 404 inscrições de diferentes regiões do país, uma abrangência nacional. Essa adesão teve como consequência expressiva difusão de conhecimento com base científica sobre a pandemia para população de interesse, além de ajudar no combate às notícias falsas. Além disso, os membros executores apresentaram um aprimoramento da aprendizagem no uso das ferramentas de criação de conteúdo online e videoaulas. Conclusão: O compartilhamento de informações sobre a Covid-19 para a população mostrou-se positiva, contribuindo no combate à pandemia, e a experiência do projeto na percepção do extensionista foi excepcional a nível pessoal e acadêmico. Período: Desenvolvido entre 18/06/2020 e 13/08/2020.
Phomopsis sojae and Sclerotinia sclerotiorum are responsible for stem and pod dryness and white mold in soybean. These pathologies directly affect the quality of seeds/grains and compromise the entire plant. The use of extracts from different plants has been the subject of research for the control of several phytopathogens. Calotropis procera is among botanical species that synthesize efficient compounds for biocontrol. In this context, the aim of this study was to evaluate the in vitro effect of C. procera aqueous extract on P. sojae and S. sclerotiorum. The experiment was carried out in completely randomized blocks in a 2 × 5 factorial scheme (two fungi and five extract concentrations 0%, 5%, 10%, 15% and 20%) with 4 replicates. C. procera aqueous extract concentrations were added to Petri dishes containing PDA. After 48 hours, the mycelial growth rate was evaluated. After seven days of incubation, the fungal colony area, sporulation, and germination of P. sojae and S. sclerotiorum were evaluated. There was significant interaction between fungi × extract concentrations (p < 0.05) for all variables analyzed. The mycelial growth rate of P. sojae was lower than that of S. sclerotiorum. The diameter of the P. sojae fungal colony was smaller than that of S. sclerotiorum when concentrations of 5%, 10% and 15% were used. As the extract concentration increased, fungi sporulation and germination reduced.
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