Mestrado em Biologia Vegetal

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17506

Nível: Mestrado Acadêmico
Ano de início: 2002
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE (Portaria MEC Nº 609, de 14/03/2019. Publicação no DOU 18 de março de 2019, seç. 1, p.52 - Parecer CNE/CES no 487/2018, Processo no 23001.000335/2018-51).
Periodicidade de seleção: Anual
Área(s) de concentração: Filosofia
Url do curso: https://biologiavegetal.ufes.br/pt-br/pos-graduacao/PPGBV/detalhes-do-curso?id=28

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Navegando Mestrado em Biologia Vegetal por Autor "Almeida, Stéfano Zorzal de"

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    Ecologia de algas perifíticas em uma lagoa costeira com múltiplos usos (lagoa Juara, Serra, ES)
    (Universidade Federal do Espírito Santo, 2011-02-23) Almeida, Stéfano Zorzal de; Milanez, Camilla Rozindo Dias; Fernandes, Valéria de Oliveira; Dias Junior, Camilo; Ferragut, Carla
    Coastal lagoons are shallow water bodies, usually oriented parallel to the coast and are often impacted by human activities. Juara lagoon (Serra, Brazil) is a shallow coastal environment that has multiple uses such as recreation, fishing and intensive aquaculture. Displays tributaries that convey untreated effluents. This study aimed to evaluate periphyton responses in two sampling sites subject to different human impacts. Three experimental structures containing artificial substrates (glass plates) were implanted at two sampling sites in Dec/2009: TR - within the intensive fish (net cage); and ED - near the mouth of the Laranjeira creek, disseminator of wastewater, and the headquarters of the Associação de Pescadores. Plants were sampled in each of the experimental structures after 21, 26 and 31 days of succession. Were evaluated: transparency, conductivity, pH, turbidity, total suspended solids, alkalinity, dissolved oxygen, water temperature, total nitrogen, nitrate, nitrite, ammonia nitrogen, total phosphorus, orthophosphate and silicate. The periphyton scrapings was analyzed by the following attributes: density (total and per class), richness (total and per class), biovolume (total and per class), diversity, evenness, abundance, dominance, photosynthetic pigments (chlorophyll a and b and carotenoid) pheophytin, dry weight and ash-free dry weight. The two sampling sites showed eutrophic characteristics, with ED had higher electrical conductivity, turbidity, total suspended solids, total alkalinity, total nitrogen, nitrate, ammonia nitrogen and orthophosphate. TR were recorded higher values for water temperature, water transparency and silicate. Density and total biovolume showed no differences between sampling sites. Bacillariophyceae were significantly higher at station TR for density and biovolume. Coscinodiscophyceae and Cyanophyceae density and biovolume were significantly higher in ED. Richness (total and per class), diversity, chlorophyll b, carotenoids, pheophytin, dry weight and ash-free dry weight showed no significant difference between the sampling stations. Chlorophyll a was higher at station ED. Impacts caused different responses in different periphytic community, especially in terms of their composition.
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    Utilização da vinhaça no cultivo da microalga Klebsormidium flaccidum (Kützing) Silva visando à produção de Biomassa aplicada ao mercado de biodiesel
    (Universidade Federal do Espírito Santo, 2019-02-22) Guarieiro, Mayara dos Santos; Fernandes, Valéria de Oliveira; Almeida, Stéfano Zorzal de; Lo Monaco, Paola Alfonsa Vieira
    The microalgae are able to supply large amounts of biomass rich in biocides of commercial interest and their use in the biofuel market is a promising alternative. However, it’s important to have the cost of the crops, requiring a search for alternatives that aim to make the costs of the process, aiming at large-scale production. The use of industrial waste is a strategy to reduce production costs through a use of available resources. The objective of this work was to reuse food as a source of nutrients for microalgae and flacidium as an alternative for the production of biofuels. For this purpose, the vineyard, the residual water of the sugarcane distillation process, was used. The experiments were carried out in the room of cultivation of the Laboratory of Taxonomy and Ecology of Continental Algae - Federal University of Espírito Santo (UFES). The analysis was carried out to follow the growth and development of the culture grown in three different types of wine (10%, 20% and 30%) diluted in distilled water. In terms of cell density, the results were observed in the treatments with 20% (1.3 x 10 cel.mL-1) and a biomass presented results at 20 and 30% dilution. In relation to the biochemical characterization of the biomass produced, the protein and lipid content decreased as the vinasse concentration increased in the media. Thus, the use of the biomass produced by the crop is not intended to optimize another use that is not a biodiesel production. In contrast, a biomass was rich in carbohydrates, which suggests its application as a potential material for the production of bioethanol. The cultivation of K. flaccidum in vinasse still demonstrates nutrient efficiency, such as ammoniacal nitrogen and orthophosphate, with removal percentages of 97.27% and 40.17% respectively, thus reducing the pollutant load of the vinasse, thus minimizing environmental impacts. Considering the results obtained, the cultivation of K. flaccidum microalgae in vinasse can be an alternative to the sustainable and low cost development for the production of biomass to the market of biofuels linked to the treatment of waste water.