DSpace Coleção:https://repositorio.ifgoiano.edu.br/handle/prefix/1422023-01-27T23:45:01Z2023-01-27T23:45:01ZA MANIPULAÇÃO DA QUALIDADE DA LUZ ASSOCIADA À UV-B MELHORA A FOTOSSÍNTESE E OS TEORES DE RUTINA EM MICROTOMATEIRO CULTIVADO EM AGRICULTURA VERTICALLima, Iury Henrique Almeidahttps://repositorio.ifgoiano.edu.br/handle/prefix/27462022-09-16T14:57:27Z2022-05-20T00:00:00ZTítulo: A MANIPULAÇÃO DA QUALIDADE DA LUZ ASSOCIADA À UV-B MELHORA A FOTOSSÍNTESE E OS TEORES DE RUTINA EM MICROTOMATEIRO CULTIVADO EM AGRICULTURA VERTICAL
Autor(es): Lima, Iury Henrique Almeida
Primeiro Orientador: Silva, Fabiano Guimarães
Primeiro Membro da Banca: Silva, Fábia Barbosa da
Segundo Membro da Banca: Resende, Érika Crispim
Terceiro Membro da Banca: Januário, Ana Helena
Abstract: Urban vertical agriculture with lighting system can be a green infrastructure alternative to increase local food production regardless of environmental and soil conditions. In this system, light quality control can improve the plant physiological performance, in addition to being associated with the induction of metabolic pathways that contribute to the phenolic compound production important to human health. Therefore, this study aimed to evaluate the influence of white and monochromatic (red and blue) wavelengths associated with UV-B on photosynthetic performance and production on phenolic compounds in microtomato fruits cultivated in vertical agriculture. The experimental design adopted was completely randomized, with six light qualities (white, white + UV, blue, blue + UV, red, and red + UV), light intensity of 300 µmol.m-2s-1, a photoperiod of 12 h, and application of UV-B radiation for 1 h daily, and an average intensity of 3.7 W.m-2, being adopted six replicates per treatment for the physiological evaluations. Twenty-six days after the treatment installation, evaluations of gas exchange, chlorophyll a fluorescence, nocturnal breathing, and photorespiration were carried out. Fruits in the ripening stages (green, orange, and red) were collected for identification and quantification of the phenolic compounds (chlorogenic acid and rutin) to improve the physiological and metabolic performance of microtomato plants with different light qualities. This study identified that plants under blue light + UV showed higher photosynthetic rates (A=11.57 µmol.m-2.s-1) and a higher amount of rutin in fruits at all maturation stages, both in plants under blue light and under blue + UV. Meanwhile, photosynthetic efficiency [reduction in photosynthetic rate (A), stomatal conductance (gs), effective quantum yield of photosystem II (YII), and Electron Transport Rate (ETR) variables] was affected under red light condition, requiring the activation of suppressive mechanisms as found, in reason of the highest values of nocturnal respiration and unregulated quantum yield of the non-photochemical dissipation of the photosystem II (YNO). These results highlight the importance to select light spectral bands in the vegetable cultivation to produce fruits with a greater amount of secondary metabolites and that can act as compounds of color, flavor, and health promotion, special interest fact to producers in sustainable cropping systems.
Editor: Instituto Federal Goiano
Tipo: Dissertação2022-05-20T00:00:00ZOBTENÇÃO DE HIDROGÉIS A PARTIR DA BIOMASSA DE CANA-DE-AÇÚCAR PARA APLICAÇÃO COMO AGENTE DE LIBERAÇÃO CONTROLADA DO HERBICIDA ATRAZINATeles, Marianahttps://repositorio.ifgoiano.edu.br/handle/prefix/26342022-08-09T13:02:40Z2022-06-14T00:00:00ZTítulo: OBTENÇÃO DE HIDROGÉIS A PARTIR DA BIOMASSA DE CANA-DE-AÇÚCAR PARA APLICAÇÃO COMO AGENTE DE LIBERAÇÃO CONTROLADA DO HERBICIDA ATRAZINA
Autor(es): Teles, Mariana
Primeiro Orientador: Souza, João
Abstract: Sugarcane biomass is one of the most residue generated in Brazil; however, the generation of a large amount of waste has been a concern for decades. Due to the high proportion of cellulose, hemicellulose, and lignin in its composition, sugarcane biomass has been used for several extractions and purification processes for the production of new materials. Cellulose, for example, has been widely explored and applied to the development of numerous products, including hydrogel. Hydrogels are superabsorbent polymeric networks capable of retaining a large amount of water. Its application is disseminated in areas, such as medicine and agriculture. In farm management, the use of hydrogels has been greater for the controlled release of nutrients and pesticides. Hereupon, this study aimed to extract cellulose from sugarcane biomass to synthesize cellulose acetate for the production of a superabsorbent hydrogel. The cellulose, cellulose acetate, and hydrogels were subjected to some characterization techniques such as Fourier Transform Infrared Spectroscopy, where it was possible to characterize the functional groups of the products obtained. Scanning Electron Microscopy was used to evaluate the change in the surface of the materials. However, we observed by the inversion test and visually that the hydrogel produced by the cellulose acetate from the biomass was not effectively formed. However, swelling and controlled release tests of atrazine were performed with hydrogel produced from commercial cellulose acetate. We observed that after 10 hours the release entered a state of equilibrium. The results were satisfactory for this hydrogel, indicating the possibility of its use in the field for the controlled release of pesticides.
Editor: Instituto Federal Goiano
Tipo: Dissertação2022-06-14T00:00:00ZDESENVOLVIMENTO E AVALIAÇÃO DE FILMES BIODEGRADÁVEIS À BASE DE FÉCULA DE MANDIOCA INCORPORADO COM ÓLEO ESSENCIAL DAS FOLHAS DO Cochlospermum regium NO ARMAZENAMENTO DE MORANGOSNascimento, Vinícius Alves dohttps://repositorio.ifgoiano.edu.br/handle/prefix/25542022-06-09T17:51:22Z2022-12-13T00:00:00ZTítulo: DESENVOLVIMENTO E AVALIAÇÃO DE FILMES BIODEGRADÁVEIS À BASE DE FÉCULA DE MANDIOCA INCORPORADO COM ÓLEO ESSENCIAL DAS FOLHAS DO Cochlospermum regium NO ARMAZENAMENTO DE MORANGOS
Autor(es): Nascimento, Vinícius Alves do
Primeiro Orientador: Cazal, Cristiane de Melo
Abstract: Rhizopus stolonifer is a postharvest phytopathogenic fungus belonging to the zygomycete class that causes soft rot in fruits and vegetables. Its spores, present in packaging and marketing environments, can easily rot these foods. Within this context, the present work developed and evaluated biodegradable films (FBS) based on cassava starch incorporated with essential oil (EO) from the leaves of Cochlospermum regium in the storage of strawberries. The EO was analyzed in a gas chromatograph. The antifungal activity assay used was the disk diffusion assay. The FBS were characterized by the determination of thickness, water solubility, transparency, water vapor permeability and biodegradability. Strawberries through weight loss, simple decay, phenol content, anthocyanin content, total soluble solids content, firmness and surface color. The major compounds found in the EO were: Myrcene (36.45%), Bicyclogermacrene (21.30%), Germacrene D (7.43%) and Spatulenol (5.65%), to our knowledge there is no record of chemical analysis of essential oil from fresh leaves of C. regium in the literature. FBS with 75 µL.mL-1 of EO in its formulation had higher values for thickness, UV 280nm light barrier and water vapor permeability. In FBS with 75 µL.mL-1 of EO and 0.0625g of tween 80, biodegradability was greater than 60%. The weight, texture, content of phenols, total soluble solids and simple decay reduced over time, whereas the anthocyanin content increased. Additionally, the strawberries became redder, darker and less shiny. FBS with EO at 75 µL.mL-1 showed strong activity against the appearance of brown spots and visible gray mold on the surface of strawberries. The parameters luminosity, chromaticity and degree of Hue indicated ripening of strawberries. At a higher incorporation dose, EO 75 µL.mL-1, the FBS showed potential to be used in the development of active and biodegradable packaging for the storage of strawberries.
Editor: Instituto Federal Goiano
Tipo: Dissertação2022-12-13T00:00:00ZFRACIONAMENTO DE BIOMASSA LIGNOCELULÓSICA COM O USO DE SOLVENTES EUTÉTICOS NATURAIS PROFUNDOS NADESRomão, Luciene Teixeira Gonçalveshttps://repositorio.ifgoiano.edu.br/handle/prefix/23482022-02-18T16:20:24Z2021-11-22T00:00:00ZTítulo: FRACIONAMENTO DE BIOMASSA LIGNOCELULÓSICA COM O USO DE SOLVENTES EUTÉTICOS NATURAIS PROFUNDOS NADES
Autor(es): Romão, Luciene Teixeira Gonçalves
Primeiro Orientador: Castro, Carlos Frederico de Souza
Primeiro Membro da Banca: Castro, Carlos Frederico de Souza
Abstract: Brazil has a privileged position as a leader in the integral use of vegetable biomass because it has the largest biodiversity on the planet. Adding value to a refinery is associated with the treatment and disintegration of biomass components, and its conversion into intermediary products such as oils, sugars, and biogas. The chemical composition of wood varies according to the species, parts of the tree and environmental conditions. It is possible to separate them into two groups of chemical components: structural and non-structural (extractives). In this context, macromolecular substances such as cellulose, hemicelluloses and lignin are included. There are processes applied to biomass fractionation in which one or more biomass pre-treatment stages are required, with the purpose of removing or breaking down the lignin and hemicellulose layers, which allows enzymes to access cellulose more easily. Given this, the combination of different pre-treatments and enzymes for hydrolysis of biomass generates a wide diversity of technological routes and can be used alternative techniques that have been developed as the use of deep natural eutectic solvent (NADES). Thus, the objective of the present work was to perform the fractionation of the biomass of the bark of the eucalyptus species Urograndis in two fractions: Cellulose rich fraction (CRF) and Lignin rich fraction (LRF) using NADES. In this process three conditions were applied for the fractioning of biomass: conventional heating (100ºC), microwave radiation with power of 600W and 1000W and ambient temperature of 25ºC. The percentages obtained through conventional heating were 72.25% of CRF, 27.75% of LRF; 72.54% of CRF with microwave radiation at a power of 1000W, 27.46% of LRF. For the treatment applied the radiation at a power of 600W were obtained: 70.61% of CRF and 29, 39% of LRF. The techniques used for characterization of LRF were infrared spectroscopy FT-IR and X-ray diffractometry for crystallinity analysis and scanning electron microscopy SEM. For characterization of LRF the techniques were used: UV-vis and FT-IR.Total crystallinity index (TCI) ,lateral order index (LOI) and hydrogen bonding intensity( HBI) were calculated . The use of NADES a low cost, sustainable organic solvent combined with microwave radiation proved to be efficient for the fractionation of biomass in these fractions
Editor: Instituto Federal Goiano
Tipo: Dissertação2021-11-22T00:00:00Z