Mestrado em Agroquímica
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2016
Conceito atual na CAPES: 4
Ato normativo: Homologação da 161ª Reunião do CTC-ES, Parecer CNE/CES 617/2016.1502
Periodicidade de seleção: Anual
Área(s) de concentração:Agroquímica
Url do curso: https://agroquimica.alegre.ufes.br/pt-br/pos-graduacao/PPGAQ/detalhes-do-curso?id=1056
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- ItemEfeito do óleo essencial obtido de resíduos de aroeira no controle de Colletotrichum musae em bananas(Universidade Federal do Espírito Santo, 2025-05-05) Vieira, Gabriel Finotti Alves; Menini, Luciano; https://orcid.org/0000-0003-3656-5428; http://lattes.cnpq.br/2646344913961349; Santos, Mário Ferreira Conceição; http://lattes.cnpq.br/7815489824754185; Parreira, Luciana Alves; https://orcid.org/0000-0001-7041-9999; http://lattes.cnpq.br/0824035845605716; https://orcid.org/0009-0002-8317-4913; http://lattes.cnpq.br/1942761961691457 ; Costa, Adilson Vidal; https://orcid.org/0000-0002-7968-8586; http://lattes.cnpq.br/1638000107452454; Venâncio, Aldino Neto; https://orcid.org/0000-0002-7217-1066; http://lattes.cnpq.br/5963890094115415Anthracnose, a disease caused by the phytopathogen Colletotrichum musae, is the main post-harvest disease affecting bananas. It can infect green and ripe fruits, leading to significant losses of up to 40% of production. At the same time, the state of Espírito Santo is Brazil's largest producer of pink pepper (Schinus terebinthifolia Raddi), primarily supplying the international market. This production generates a large amount of residues, accounting for approximately 75% of the harvest. Developing products that utilize pink pepper, such as essential oil production from these residues, can enhance its added value and benefit the production chain. This study was conducted to identify a natural antifungal agent with the potential to inhibit this phytopathogen. In this case, essential oil from S. terebinthifolia Raddi residues (EOStR) was emulsified with 0.5% v v⁻¹ Tween 80 and Span 85, and its inhibitory effect against C. musae was evaluated. The constituents of OEStR were analyzed using gas chromatography with flame ionization detection (GC/FID) and mass spectrometry (GC/MS), with δ-3-carene (28.11%), limonene (22.48%), and α-phellandrene (17.09%) identified as the major components. The EOStR emulsion remained physically stable for 28 days after undergoing stability tests. In vitro bioassay results revealed IC₅₀ and IC₉₀ values of 14.17 µL mL⁻¹ and 20.26 µL mL⁻¹, respectively, for conidial inhibition, and 28.92 µL mL⁻¹ and 57.05 µL mL⁻¹, respectively, for mycelial growth inhibition of C. musae. In vivo assays demonstrated that the Area Under the Disease Progress Curve (AUDPC) showed an 83.5% reduction in anthracnose incidence, with only 3% disease development in bananas after eight days. Therefore, EOStR shows strong potential as an effective antifungal agent against C. musae, with promising potential for use in organic farming and integrated disease management strategies, utilizing an abundant raw material from the state of Espírito Santo.
- ItemRecipiente de tecido não tecido (TNT) de diferentes cores no desenvolvimento de mudas de jequitibá-rosa (Cariniana legalis (Mart.) O. Kuntze) em viveiro(Universidade Federal do Espírito Santo, 2025-03-17) Conceição, Maria Eduarda Marques da; Oliveira, Fabricia Benda de ; https://orcid.org/0000-0002-4456-0275; http://lattes.cnpq.br/9513837515797451; Peluzio, João Batista Esteves ; https://orcid.org/0000-0002-2006-9887; http://lattes.cnpq.br/5045743675450197; Oliveira, Carlos Henrique Rodrigues de ; https://orcid.org/0000-0003-4829-8005; http://lattes.cnpq.br/1293627013882628; https://orcid.org/0009-0003-0604-9497; http://lattes.cnpq.br/9370444720721774; Câmelo, Danilo de Lima ; https://orcid.org/0000-0002-9801-8772; http://lattes.cnpq.br/0620489716195442; Souza, Maurício Novaes ; https://orcid.org/0000-0003-3100-6694; http://lattes.cnpq.br/9102965807788455; Moura, Cristiane Coelho de ; https://orcid.org/0000-0001-6743-8638; http://lattes.cnpq.br/8485099797100386; Correia, Tamíris Partélli ; https://orcid.org/; http://lattes.cnpq.br/The several deforestation of native trees in Atlantic Forest combined with the lack of adequate management its shown on the reduction of biodiversity among forest species. Due this scenario, it is available stablish directional research pointing the improvement of techniques that may discribe native spicies multiplication. This body of work claims to evaluate the differences about distinguish colors and the influence into made of non- woven fabric (TNT) on the production of Cariniana legalis (Mart.) O. Kuntze (jequitibá-rosa) seedlings, compared to traditional plastic bags. The experiment occured at Instituto Federal do Espírito Santo (IFES - Alegre campus), Espírito Santo, Brazil; and it was managed in a greenhouse. Were performed four treatments about the topic, being all of the them auditioned and replicated three times. They're traditional plastic and TNT bags having different colours black, green and white. Using the randomized block design (RCB), the evaluation followed the parameters hereafter: height and stem diameter, robustness index, dry biomass, IQD, leaf area, root area, substrate and container temperature, material toxicity and TNT's decomposition through tensile strength. Therefore its been obtain the varience's analysis P> 0.5, Tukey at 95% and regression analytics through the growth curve were performed. In the growth curves for height and stem diameter, the black and green TNT containers showed progressive growth, however, the seedlings produced in white TNT bags showed slower growth. No statistical differences were observed in the biomass data, Dickson Quality Index (IQD) and leaf area and root area. The substrate and container temperature was higher for the plastic bags. The plants showed a satisfactory nutritional content in the treatments analyzed, furthermore the TNT in none of the colors analyzed presented toxicity to the plants. The tensile analysis showed that white TNT is more resistant compared to the black and green ones that got a lower resistance, otherwise that bags which had exposing to field conditions presented greater deformation. With the found results in the research, TNT bags exhibit itself as a viable alternative for seedling production, mainly due to the quality of the seedlings and the biodegradable material, especially the black and green bags
- ItemAtividade e seletividade de eletrocatalisadores de Au para a eletrorredução de dióxido de carbono em eletrólito ácido de estado sólido(Universidade Federal do Espírito Santo, 2025-04-01) Marconsini, Lília Togneri; Profeti, Demetrius; https://orcid.org/0000-0003-4565-3331; http://lattes.cnpq.br/5030262115789096; Lima, Fábio Henrique Barros de; https://orcid.org/0000-0001-5501-2429; ttp://lattes.cnpq.br/8978509213666235; Profeti, Luciene Paula Roberto; https://orcid.org/; http://lattes.cnpq.br/6517975282316378; https://orcid.org/0000-0001-7020-5712; http://lattes.cnpq.br/2030424424386369; Freitas, Marcos Benedito José Geraldo de; https://orcid.org/0000-0003-1521-774X; http://lattes.cnpq.br/3485939623614913; Sousa, Raphael Naqao; https://orcid.org/0000-0003-2692-0289; http://lattes.cnpq.br/Gold-based electrocatalysts are well known for their activity in the electrochemical reduction of CO2 (CO2RR) to CO in aqueous solution. However, under such experimental conditions, water electrolysis emerges as a competing reaction, reducing selectivity, and both size and dispersion of Au particles directly influence the catalytic performance of the electrodes. In this context, studies in the field of electrocatalysis have proposed gold-based electrocatalysts in gas diffusion electrodes (GDEs) towards mitigating mass transport limitations, enhancing CO2 solubility, and and suppressing the hydrogen evolution reaction (HER). Evidence has shown CO2RR in acidic media and in presence of alkali metal cations can inhibit the migration of undesirable species between the cell compartments and reduce carbonation. This study investigates CO2RR in H2SO4 and K2SO4 using Au-based electrocatalysts in GDEs. Such materials were synthesized via chemical reduction with NaBH4 and sputtering deposition. Structural and morphological characterization was performed by X-Ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X Ray Spectroscopy (EDX) and Transmission Electron Microscopy (TEM) for providing detailed information on the properties of the GDE componentes and electrochemical experiments were conducted in zero-gap cell, where CO2 was supplied from the rear side of the GDE directly at the interface between the cathode and the Nafion membrane. Finally, electrochemical mass spectrometry (EC-MS) and gas chromatography (GC) assessed product distribution and quantification. The results showed electrocatalyst performance is strongly influenced by morphology and Au-Citrate catalyst achieved higher faradaic efficiency (FE) for CO, reaching values above 90%. In contrast, Au-sputtering formed a dense and homogeneous film, resulting in a lower number of active sites (specifically fewer low-coordination Au atoms), hence, reduced FE (maximum of 57%) and increased HER competition. A TEM analysis revealed structural modifications in Au-Citrate nanoparticles after electrolysis experiments, suggesting a coalescence process that, while potentially reducing the active surface area, may also expose new catalytically active sites, thereby enhancing CO2RR efficiency
- ItemCedrela fissilis Vell. e Cariniana estrellensis (Raddi) Kuntze sob doses crescentes de fertilização de liberação controlada(Universidade Federal do Espírito Santo, 2025-05-07) Marques, Jamilly de Assis; Delarmelina, William Macedo ; https://orcid.org/0000-0001-9347-9441; http://lattes.cnpq.br/9817904774440114; Pelúzio, João Batista Esteves ; https://orcid.org/0000-0002-2006-9887; http://lattes.cnpq.br/5045743675450197; Oliveira, Carlos Henrique Rodrigues de ; https://orcid.org/0000-0003-4829-8005; http://lattes.cnpq.br/1293627013882628; https://orcid.org/0009-0001-2290-0857; http://lattes.cnpq.br/4201636034070365; Burak, Diego Lang ; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; Caldeira, Marcos Vinicius Winckler ; https://orcid.org/0000-0003-4691-9891; http://lattes.cnpq.br/3624066484009682; Gonçalves, Elzimar de Oliveira; https://orcid.org/0000-0001-7675-2493; http://lattes.cnpq.br/4127505406039950; Moura, Cristiane Coelho de ; https://orcid.org/0000-0001-6743-8638; http://lattes.cnpq.br/8485099797100386The use of controlled-release fertilizers (CRF) represents a promising strategy to improve the production of forest seedlings, particularly for native species with high ecological and silvicultural value. This study evaluated the effects of CRF on the morphophysiological performance of Cedrela fissilis Vell. (cedro-rosa) and Cariniana estrellensis (Raddi) Kuntze (jequitibá-branco) under nursery conditions. The experiment was conducted in a greenhouse using a randomized block design in a 2 × 5 factorial scheme, with two CRF types (NPK 16-08-12(+2), with 6- and 9-month release periods) applied at five doses (0, 4, 8, 12, and 16 g L⁻¹). Variables assessed included height, the diameter at the collar, robustness index, dry biomass, leaf area, root traits, and photosynthetic pigments. Data normality was verified using the Shapiro–Wilk test. For normally distributed data, analysis of variance (ANOVA) was performed at a 5% significance level. In case of significant difference, the mean results were compared by means of t-tests and regression analysis using the software SISVAR 5.6. Seedling responses followed a quadratic pattern, with optimal growth observed at intermediate fertilizer doses. The recommended mean application rates (DMAR), based on the average values of maximum technical efficiency (MTE) doses for the main growth parameters, were 15 g L⁻¹ for C. fissilis and 11 g L⁻¹ for C. estrellensis. CRF application significantly improved seedling growth, biomass accumulation and overall quality, in addition to notable gains in uniformity and visual vigor. The differences between the assessed species highlight the need for tailored fertilization recommendations and their importance. It is concluded that CRFs are effective tools for the nutritional management of native forest seedlings, offering productive and functional benefits which enhance nursery efficiency and support the success of ecological restoration programs in Brazil
- ItemComparação da eficiência de adsorção de CR(VI) entre biocarvão de palha de café e lodo de esgoto modificados com ferro(Universidade Federal do Espírito Santo, 2025/08/13) Braga, Barbara Letícia de Freitas Mendes; Anastácio, Alexandre dos Santos; https://orcid.org/0000-0002-2620-754X; http://lattes.cnpq.br/5749524589135573; Burak, Diego Lang; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; https://orcid.org/0009-0007-7828-1550; http://lattes.cnpq.br/4579998692304342; Neves, Mirna Aparecida; https://orcid.org/; http://lattes.cnpq.br/4696981882395783; Reis, Rayner Hugo Cassa Louzada dos ; https://orcid.org/0000-0002-4227-4136; http://lattes.cnpq.br/7684178857424982Industrial waste contaminated with hexavalent chromium, Cr(VI), has a significant impact on the environment and human health. In the environment, Cr(VI) is highly toxic to aquatic organisms, affecting biodiversity and water quality. Additionally, it can contaminate soil, impairing plant growth and food production. Its persistence in the environment exacerbates its potential for long-term accumulation. Regarding human health, industrial workers exposed to Cr(VI) face severe occupational risks, including lung cancer and skin and respiratory irritations. Contamination of drinking water with hexavalent chromium poses a public health threat, with chronic exposure linked to stomach cancer and damage to internal organs. Furthermore, Cr(VI) can accumulate in aquatic organisms, introducing it into the human food chain. Given this environmental issue, remediation strategies, such as adsorption using adsorbent materials, are essential for containment. This study aims to promote the removal of Cr(VI) through an adsorption process, using biochar from coffee husks modified with zero-valent iron nanoparticles as the adsorbent material.