https://periodicos.ufsm.br/reget <p>The <strong>Electronic Journal of Management, Education and Environmental Technology </strong>aims to publish scientific works in undergrad and postgraduate levels (Latu and Stricto Sensu) on the fields of Management, Education and Environmental Technology. Besides, the Journal provides the electronic version of scientific papers linked to the triad teaching, research and extension that fit to any of the subjects aforementioned.</p> <p><strong>eISSN 2236-1170 | Qualis/CAPES (2017-2020) = B1</strong></p> Universidade Federal de Santa Maria en-US Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental 2236-1170 <a href="https://www.dropbox.com/s/7crm1wq8syvwtt7/DECLARATION%20AND%20TRANSFER%20OF%20COPYRIGHT%20REGET.doc?dl=0" target="_blank">DECLARATION</a> https://periodicos.ufsm.br/reget/article/view/85777 <p>Water for human consumption must comply with legal potability standards, involving treatments that often use chemical agents that have impacts on the environment and human health. An alternative is to use organic polymers, such as chitosan, but in some situations, its structure should be modified to improve its applicability. This is achieved by adding reagents such as CHPTAC to make it cationic. This research aimed to create a cationic polysaccharide derived from chitosan using the CHPTAC reagent and apply it in water treatment, varying dosages and pH. The results showed that the synthesized chitosans achieved good efficiency in removing turbidity and color, in which some dosages were more effective. Furthermore, each flocculant performed better in a specific pH range, often in acidic pH. The research highlighted that both cationic and non-cationic chitosan are effective in water treatment, providing a viable alternative to commonly used inorganic coagulants.</p> Vanessa Rossato de Bastiani Arci Dirceu Wastowski Luma Schervenski Tejada Gabriel Baraldi Volpi Bruna Thais Lauer Grade Genesio Mario da Rosa Jaqueline Ineu Golombieski Copyright (c) 2024 http://creativecommons.org/licenses/by-nc-sa/4.0 2024-11-26 2024-11-26 28 e85777 e85777 10.5902/2236117085777 https://periodicos.ufsm.br/reget/article/view/84684 <p>This study aimed to evaluate the influence of ultraviolet light on the germination of Trifolium resupinatum L. seeds (Persian clover). The seeds were exposed to different times (doses) of exposure to UV-B and UV-C light with radiation intensity of 2.5 W m-2. Afterward, they were sown in gerbox boxes with germitest paper and stored in a Biochemical Oxygen Demand at 20°C. Tests such as germination, germination speed index, length and dry mass of seedling were performed. No significant differences were among UV-B light treatments. However, seeds exposed to 8 hours of UV-C light showed a reduction in the germination speed index when compared to control (from 92.5 to 88.7). Furthermore, the length of the seedlings increased by an average of 1.3 cm in relation to the control. Under the conditions of this study, it was concluded that Persian clover seeds exhibit relative tolerance to UV-B radiation while showing some sensitivity to UV-C radiation. The pelleting of the seeds associated with the tegument acted as a physical block, impeding the passage of UV light. The results contribute to our understanding of how Persian clover responds to UV radiation exposure.</p> Raquel Stefanello Rafaelle Almeida Menna Barreto Wagner Jesus da Silva Garcia Lucio Strazzabosco Dorneles Copyright (c) 2024 http://creativecommons.org/licenses/by-nc-sa/4.0 2024-11-13 2024-11-13 28 e84684 e84684 10.5902/2236117084684