Segurança alimentar de hortaliças orgânicas: aspectos sanitários e nutricionais

Arbos, Kettelin Aparecida; Freitas, Renato João Sossela de; Stertz, Sônia Cachoeira; Carvalho, Lucimar Aparecida

doi:10.1590/s0101-20612010000500033

Cited by 56 publications

(61 citation statements)

References 16 publications

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“…Ascorbic acid concentrations determined in this study for A. coriacea and A. sylvatica were lower than those reported in other Annona species; e.g., A. cherimolia, 4-6 mg/100g (Vasco et al, 2008); A. muricata, 4 mg/100g (Duke and DuCellier, 1993); A. diversifolia, 2.38 mg/100 g (Julián-Loaeza et al, 2010); and A. squamosa, 15-35 mg/100g (Andrade et al, 2001). However, species of Annona feature equivalent content of vitamin C when compared to other fruits consumed as tomato, peach and others (Arbos et al, 2010;Chitarra and Chitarra, 1990).…”

Section: Discussionmentioning

confidence: 99%

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

et al. 2015

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The antioxidant potential of fruit pulp and seeds of extracts of the Annona coriacea, and A. sylvatica (Annonaceae) were investigated, as well contents total phenolics, flavonoids, condensed tannins and ascorbic acid. Was used to determine the antioxidant activity the 1,1-diphenyl-1-picrylhydrazyl free radical (DPPH), β-carotene bleaching and ABTS radical cation method. The total phenol, total flavonoid, condensed tannin, and ascorbic acid contents were measured spectrophotometrically. In this study, the pulp and seeds of the fruits were extracted using methanol/water (8:2) for maceration. The seed extracts of A. coriacea demonstrated a moderate antioxidant effect with free radical scavenging activity of 31.53%, by the DPPH test, 51.59% by the β-carotene bleaching test and 159.50 µM trolx/g of extract in the ABTS assay. We found that the hydromethanolic seed extract of A. coriacea had high total phenol (147.08 ± 4.20 mg of GAE/g of extract) and flavonoid (131.18 ± 2.31 mg of QE/g of extract) content. This indicated that the antioxidant activity of the extracts was related to the contents of these constituents.Keywords: Annona, antioxidant activity, phytochemistry. Conteúdo

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Section: Discussionmentioning

confidence: 99%

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

et al. 2015

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“…Data in this study also support the results by Santana et al (2006) and Gomes Neto et al (2012), evaluating parasite contamination of green leaf and iceberg lettuces, respectively, in the three cropping systems, and studies analysing lettuces grown in conventional and hydroponic systems (NERES et al, 2011;GREGÓRIO et al, 2012;PACIFICO et al, 2013). Similarly, Santarém et al (2012), Alves et al (2013), Vieira et al (2013), and Ramos et al (2014) found contamination in conventional farming system leafy vegetables, and Arbos et al (2010) in an organic production system.…”

Section: Resultsmentioning

confidence: 90%

“…Recovery of helminth eggs and larvae, and protozoan cysts or oocysts, from leafy vegetables followed the procedure described by Arbos et al (2010), with some modifications. Dead leaves were removed from each plant and discarded.…”

Section: Parasitological Analysismentioning

confidence: 99%

“…The use of animal manure increases the risk of microbiological and parasite contamination, making the food unsuitable to be consumed raw without proper sanitization (SANTANA et al, 2006;ARBOS et al, 2010). In the hydroponic system, contamination results from, among other factors, the sanitary conditions of the water, as, in this system, the plant nutrients are pre-dissolved in water (SANTANA et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Parasitological analysis of green leaf lettuce cultivated in different production systems

Santos

Kuba

Santos

et al. 2017

SCA

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This study analysed parasite contamination in green leaf lettuce (Lactuca sativa), grown in different cultivation systems (conventional, organic, and hydroponic), from a family farmer cooperative in the municipality of Presidente Prudente, São Paulo, Brazil. Samples were collected at weekly intervals during five months, totalling 180 vegetable samples (60 samples of leaf lettuce from each cultivation system). Lettuce leaves were washed with 0.5% Extran MA 02, and the resulting fluid subjected to sedimentation and centrifugal flotation for recovery of parasite structures. Overall, 71 samples (39.4%) were contaminated with at least one parasite structure, 34 (47.9%) from lettuce grown in the hydroponic system, 20 (28.2%) from the organic system, and 17 (23.9%) from the conventional system. Entamoeba spp. cysts were the most common parasite structures found in the leafy vegetables, with the highest cyst counts found in the hydroponic system (p = 0.003). It is concluded that, regardless of the cultivation system (conventional, organic, or hydroponic), there is a possibility of green leaf lettuce contamination by intestinal parasites. Measures that improve sanitary conditions during production, as well as proper hygiene during the preparation of raw leafy vegetables, may be important to reduce contamination and consequent transmission of parasite diseases from raw leafy vegetable consumption. Key words: Enteroparasites. Cultivation systems. Leafy vegetables. Zoonoses. ResumoO presente estudo analisou a contaminação parasitológica em alfaces crespas (Lactuca sativa) cultivadas em diferentes sistemas de produção (convencional, orgânico e hidropônico), fornecidas por uma cooperativa de produtores da agricultura familiar, no município de Presidente Prudente, São Paulo. As coletas foram repetidas em intervalos semanais, durante um período cinco meses, totalizando 180 amostras de hortaliças (60 amostras de alface por tipo de produção). As folhas das alfaces foram lavadas com Extran MA 02 a 0.5% e o fluído resultante submetido às técnicas de sedimentação e de centrífugo-flutuação, para recuperação das estruturas parasitárias. Observou-se que do total de 180 amostras, 71 (39,4%) estavam contaminadas por pelo menos uma estrutura parasitária, sendo 34 (47,9%) das alfaces cultivadas no sistema hidropônico, 20 (28,2%) no orgânico e 17 (23,9%) no sistema convencional. Cistos de Entamoeba spp. foram as estruturas parasitárias mais frequentes nas hortaliças, com maior contagem de cistos naquelas produzidas no sistema hidropônico (p=0,003). Conclui-se que independentemente do sistema de cultivo (convencional, orgânico e hidropônico), existe a possibilidade de contaminação de alfaces por enteroparasitos. Medidas que propiciem a melhoria na qualidade higiênico-sanitária na produção, assim como a adequada higienização das verduras antes do consumo "in natura" podem ser importantes para a redução da contaminação e consequente transmissão de doenças parasitárias pelo consumo "in natura" de hortaliças. Palavras-chave: Enteroparasi...

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“…GOMES NETO et al, 2012.). Conversely, Arbos et al (2010) analyzed lettuce and carrots produced in thirteen organic certified farms in the metropolitan region of Curitiba, Parana, Brazil, and found samples with coliform at 45 °C counts higher than the limit tolerated by the Brazilian legislation, as well as the presence of Salmonella spp. and parasites.…”

Section: Farmmentioning

confidence: 99%

Microbiological evaluation of lettuce produced by conventional and organic systems in farms of Londrina, PR

Niguma¹,

Pelayo²,

Oliveira³

2017

SCA

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The aims of this study were to evaluate the contamination of lettuce (Lactuca sativa), produced in Londrina, Paraná (PR), with total coliform, coliform at 45 °C, E. coli, and Salmonella spp.; and to determine the E. coli contamination of irrigation water used at the farms studied. Four farms were evaluated, of which three produced lettuce using a conventional system and one using an organic system. An evaluation of the production practices of the farms was also carried out. A total of 111 samples were analyzed, 71 lettuce samples from the conventional system and 40 samples from the organic system. A total of eight irrigation water samples were collected for analysis. Coliform at 45 °C counts above the limit tolerated by Brazilian legislation were observed in 2.8% (2/71) of conventionally grown lettuce samples, and Salmonella spp. was isolated in 1.4% (1/71) of those samples. In the organic lettuce samples, 12.5% (5/40) had coliform at 45 °C counts above the limit tolerated and Salmonella spp. was not detected. Irrigation water samples from three farms were unsatisfactory, with counts higher than 10 2 MPN of E. coli per 100mL. The results of this study demonstrate that most conventionally grown lettuce samples show good sanitary conditions in production, and that lettuce contamination is not related to contamination found in irrigation water samples. The results also showed that the organic production practices required by Brazilian certification agencies should be applied to ensure that contamination of produced lettuce remains controlled. Key words: Coliform at 45 °C. Total coliform.Salmonella spp. Irrigation water. ResumoOs objetivos deste estudo foram avaliar a contaminação por coliformes totais, coliformes a 45 °C, Escherichia coli e Salmonella spp. em alfaces crespas (Lactuca sativa) produzidas na região de Londrina, PR, e a contaminação por E. coli das amostras da água de irrigação empregadas nas propriedades estudadas. Quatro propriedades rurais foram avaliadas, das quais três produziam alfaces pelo sistema convencional e uma pelo sistema orgânico. Avaliação das práticas de produção dessas propriedades também foi realizada. Um total de 111 amostras foi coletado, sendo 71 amostras de produção convencional e 40 amostras de produção orgânica. Oito amostras de água de irrigação foram coletadas para análise. Contagens de coliformes a 45 °C acima do tolerado pela legislação brasileira foram observadas em 2,8 % (2/71) das alfaces convencionais analisadas, e Salmonella spp. foi isolada em 1,4 % (1/71) destas amostras. de coliformes a 45 °C acima do limite preconizado e Salmonella spp. não foi isolada nessas amostras. As amostras de água de irrigação de três propriedades rurais apresentaram resultados insatisfatórios com contagens superiores a 10 2 MPN de E. coli por 100 mL. Os resultados obtidos neste estudo mostraram que a maioria das amostras de alfaces convencionais analisadas apresentou boas condições higiênico-sanitárias e uma não relação com a contaminação encontrada nas amostras de água de irrigaçã...

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Segurança alimentar de hortaliças orgânicas: aspectos sanitários e nutricionais

Cited by 56 publications

References 16 publications

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

Parasitological analysis of green leaf lettuce cultivated in different production systems

Microbiological evaluation of lettuce produced by conventional and organic systems in farms of Londrina, PR

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