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1.
Sci. agric. ; 78(5): 1-9, 2021. ilus, graf, tab
Artigo em Inglês | VETINDEX | ID: vti-31347

Resumo

The adaptation of the Global Navigation Satellite Systems (GNSS) technology to fit the needs of farmers requires knowledge of the accuracy level delivered by a GNSS receiver in working conditions. To date, no methodology indicates the minimum number of replications to perform a statistical comparison. This study aims to advance knowledge on the methodological approach for evaluating the static and dynamic performance of GNSS receivers commonly used in agricultural operations. For the static test, a supporting frame in the ground carried all the receivers with coordinates properly transported. In the dynamic test, a circular rail with a 9.55 m radius was installed at ground level with a platform driven by an electric motor to carry the receivers at a constant speed. The transversal error of the receiver to the circular reference line was measured. The error with 95 % probability (E95) to receivers without differential correction ranged between 4.22 m and 0.85 m in the static test, and 2.25 m and 0.98 m in the dynamic test. Receivers with differential correction had E95 values below 0.10 m in the static test and 0.16 m in the dynamic test. Receivers with C/A code require five replications at minimum and 13 replications are needed for L1/L2 with differential correction signals in the dynamic test. The static test needs nine replications for C/A and five for L1/L2 with differential correction signals.(AU)


Assuntos
Navegação Espacial , Agricultura/instrumentação , Tecnologia/estatística & dados numéricos
2.
Sci. agric ; 78(5): 1-9, 2021. ilus, graf, tab
Artigo em Inglês | VETINDEX | ID: biblio-1497968

Resumo

The adaptation of the Global Navigation Satellite Systems (GNSS) technology to fit the needs of farmers requires knowledge of the accuracy level delivered by a GNSS receiver in working conditions. To date, no methodology indicates the minimum number of replications to perform a statistical comparison. This study aims to advance knowledge on the methodological approach for evaluating the static and dynamic performance of GNSS receivers commonly used in agricultural operations. For the static test, a supporting frame in the ground carried all the receivers with coordinates properly transported. In the dynamic test, a circular rail with a 9.55 m radius was installed at ground level with a platform driven by an electric motor to carry the receivers at a constant speed. The transversal error of the receiver to the circular reference line was measured. The error with 95 % probability (E95) to receivers without differential correction ranged between 4.22 m and 0.85 m in the static test, and 2.25 m and 0.98 m in the dynamic test. Receivers with differential correction had E95 values below 0.10 m in the static test and 0.16 m in the dynamic test. Receivers with C/A code require five replications at minimum and 13 replications are needed for L1/L2 with differential correction signals in the dynamic test. The static test needs nine replications for C/A and five for L1/L2 with differential correction signals.


Assuntos
Agricultura/instrumentação , Navegação Espacial , Tecnologia/estatística & dados numéricos
3.
Artigo em Inglês | LILACS-Express | VETINDEX | ID: biblio-1462495

Resumo

ABSTRACT Crop pests have negative impacts on yield. This paper proposes a spatiotemporal geostatistical modeling to compare data of adult Syrphidae fly count and corn leaf aphid Rhopalosiphum maidis (Fitch, 1856) colonies in corn crops. The use of a geostatistical model that allows the space-time variation makes the approach more interesting because it is a more complete model. Multiple regression was used to model the trend component for the variable response adult Syrphidae fly count and corn leaf aphid colonies, with the coordinates serving as covariates and the spatiotemporal variations around the deviation are described by a random spacetime residual field. Finally, the prediction map obtained by kriging may be a biological indicator of possible corn leaf aphid colonies in the corn crop. It was possible to verify that the occurrence of the pest provided a significant increase in adult predators and seminatural habitats may favor populations of natural enemies.

4.
Arq. Inst. Biol ; 88: e00332020, 2021. ilus, tab, graf
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1348966

Resumo

Crop pests have negative impacts on yield. This paper proposes a spatiotemporal geostatistical modeling to compare data of adult Syrphidae fly count and corn leaf aphid Rhopalosiphum maidis (Fitch, 1856) colonies in corn crops. The use of a geostatistical model that allows the space-time variation makes the approach more interesting because it is a more complete model. Multiple regression was used to model the trend component for the variable response adult Syrphidae fly count and corn leaf aphid colonies, with the coordinates serving as covariates and the spatiotemporal variations around the deviation are described by a random spacetime residual field. Finally, the prediction map obtained by kriging may be a biological indicator of possible corn leaf aphid colonies in the corn crop. It was possible to verify that the occurrence of the pest provided a significant increase in adult predators and seminatural habitats may favor populations of natural enemies.


Assuntos
Modelos Estatísticos , Zea mays , Dípteros , Afídeos , Pragas da Agricultura , Análise Espaço-Temporal
5.
R. bras. Ci. avíc. ; 21(2): 1-5, 2019. tab
Artigo em Inglês | VETINDEX | ID: vti-23275

Resumo

Corn is the main energy feed used in broiler chickens rations in most countries. In the literature, there are indications that high density corn segregated in densimetric table contains higher value of metabolizable energy than the corresponding fraction of low density, but the reasons are not clear. This study was conducted to determine the metabolizable energy of different types of corn, segregated in densimetric table, for poultry. The corn types were selected by the texture of grain (flint, semi-dent and dent) and were planted in the same area. Semi-dent grain corn was used as standard, and the flint and dent grains were segregated in a densimetric table to separate 25% of the total as high density and 25% as low density. The flint, semi-dent and dent corn and the high and low density fractions of flint and dent corn were used in a metabolism assay with broiler chickens from 20 to 29 days of age, with 9 replicates, to determine the Nitrogen-corrected apparent metabolizable energy (MEn). The density of the different types of corn, measured as hectoliter weight, varied from 683 to 768 g/L for dent corn and from 778 to 802 g/L for the flint corn; the density of the unsegregated semi-dent corn was intermediate. MEn ranged from 3.109 to 3.194 kcal/g for dent corn and from 3.141 to 3.211 kcal/g for flint corn. MEn of the high density dent corn, 3.194 kcal/g, was higher (p<0.05) than that of the low density fraction, 3.109 kcal/g. Segregation of flint corn did not result in fractions with contrasting MEn values. For dent corn, segregation in densimetric table was effective, resulting in a fraction with improved MEn for chickens.(AU)


Assuntos
Animais , Galinhas/crescimento & desenvolvimento , Galinhas/metabolismo , Zea mays/anatomia & histologia , Zea mays/metabolismo , Ingestão de Energia , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal
6.
Rev. bras. ciênc. avic ; 21(2): 1-5, 2019. tab
Artigo em Inglês | VETINDEX | ID: biblio-1490637

Resumo

Corn is the main energy feed used in broiler chickens rations in most countries. In the literature, there are indications that high density corn segregated in densimetric table contains higher value of metabolizable energy than the corresponding fraction of low density, but the reasons are not clear. This study was conducted to determine the metabolizable energy of different types of corn, segregated in densimetric table, for poultry. The corn types were selected by the texture of grain (flint, semi-dent and dent) and were planted in the same area. Semi-dent grain corn was used as standard, and the flint and dent grains were segregated in a densimetric table to separate 25% of the total as high density and 25% as low density. The flint, semi-dent and dent corn and the high and low density fractions of flint and dent corn were used in a metabolism assay with broiler chickens from 20 to 29 days of age, with 9 replicates, to determine the Nitrogen-corrected apparent metabolizable energy (MEn). The density of the different types of corn, measured as hectoliter weight, varied from 683 to 768 g/L for dent corn and from 778 to 802 g/L for the flint corn; the density of the unsegregated semi-dent corn was intermediate. MEn ranged from 3.109 to 3.194 kcal/g for dent corn and from 3.141 to 3.211 kcal/g for flint corn. MEn of the high density dent corn, 3.194 kcal/g, was higher (p<0.05) than that of the low density fraction, 3.109 kcal/g. Segregation of flint corn did not result in fractions with contrasting MEn values. For dent corn, segregation in densimetric table was effective, resulting in a fraction with improved MEn for chickens.


Assuntos
Animais , Fenômenos Fisiológicos da Nutrição Animal , Galinhas/crescimento & desenvolvimento , Galinhas/metabolismo , Ingestão de Energia , Ração Animal/análise , Zea mays/anatomia & histologia , Zea mays/metabolismo
7.
Sci. agric ; 74(1): 8-17, 2017. tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1497620

Resumo

The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 years of genetic improvement and the use of different breeds may affect the model parameter values, which also may need to be re-estimated for crossbred animals. The aim of this study was to estimate parameter values and confidence intervals for the DGM with growth and body composition data from Zebu crossbred animals. Confidence intervals and asymptotic distribution were generated through nonparametric bootstrap with data from a field experiment conducted in Brazil. The parameters showed normal probability distribution for most scenarios. The rate constant for deoxyribonucleic acid (DNA) synthesis had a minimum increase of 156 % and the maximum of 389 %, compared to the original values and the maintenance requirement had a minimum increase of 126 % and maximum of 160 % compared to the original values. Lower limits of 95 % confidence intervals for the parameters related to maintenance and protein accretion rates were higher than the original estimates of the DGM, evidencing genetic differences of the Zebu crossbred animals in relation to the original DGM parameters.


Assuntos
Animais , Bovinos , Crescimento , Modelos Estatísticos , Padrões de Referência , Previsões , Dinâmica não Linear , Distribuição Normal , Intervalos de Confiança
8.
Sci. agric. ; 74(1): 8-17, 2017. tab, graf
Artigo em Inglês | VETINDEX | ID: vti-684148

Resumo

The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 years of genetic improvement and the use of different breeds may affect the model parameter values, which also may need to be re-estimated for crossbred animals. The aim of this study was to estimate parameter values and confidence intervals for the DGM with growth and body composition data from Zebu crossbred animals. Confidence intervals and asymptotic distribution were generated through nonparametric bootstrap with data from a field experiment conducted in Brazil. The parameters showed normal probability distribution for most scenarios. The rate constant for deoxyribonucleic acid (DNA) synthesis had a minimum increase of 156 % and the maximum of 389 %, compared to the original values and the maintenance requirement had a minimum increase of 126 % and maximum of 160 % compared to the original values. Lower limits of 95 % confidence intervals for the parameters related to maintenance and protein accretion rates were higher than the original estimates of the DGM, evidencing genetic differences of the Zebu crossbred animals in relation to the original DGM parameters.(AU)


Assuntos
Animais , Bovinos , Modelos Estatísticos , Previsões , Padrões de Referência , Crescimento , Dinâmica não Linear , Intervalos de Confiança , Distribuição Normal
9.
Ci. Rural ; 46(10): 1689-1694, Oct. 2016. tab, graf
Artigo em Inglês | VETINDEX | ID: vti-29765

Resumo

Mango (Mangifera indica L.) trees stand out among the main fruit trees cultivated in Brazil. The mango rosa fruit is a very popular local variety (landrace), especially because of their superior technological characteristics such as high contents of Vitamin C and soluble solids (SS), as well as attractive taste and color. The objective of this study was to select a breeding population of mango rosa (polyclonal variety; 5 individuals) that can simultaneously meet the fresh and processed fruit markets, using the multivariate method of principal components and the biplot graphic. The principal components, biplot graphic, and phenotype correlations were obtained using the R (2012) software. Pulp percentage and the pulp, skin, and seed mass variables can be indirectly selected using the smallest fruit diameter, which allowed an easier measurement. The P23R AREA3, P30R AREA3, and P32R AREA3 genotypes are selection candidates due to the presence of alleles, which are important agro-technological traits for mango breeding. This study showed that the biplot analysis is a valuable tool for decision making and visualization of interrelationships between variables and genotypes, facilitating the mango selection process.(AU)


Dentre as principais fruteiras cultivadas no Brasil, destaca-se a mangueira ( Mangifera indica L.). A manga rosa é uma variedade local bastante apreciada, especialmente devido a suas características tecnológicas superiores, tais como alto teor de Vitamina C, conteúdo de sólidos solúveis totais (SS), bem como sabor e cor atraentes. O objetivo deste estudo foi selecionar uma população de melhoramento de manga rosa (variedade policlonal; 5 indivíduos) que atenda simultaneamente aos mercados de frutas frescas e processadas, empregando o método multivariado de componentes principais e o gráfico biplot. Os componentes principais, o gráfico biplot e as correlações fenotípicas foram obtidos usando o software R (2012). As variáveis porcentagem de polpa e as massas de polpa, casca e semente podem ser selecionadas indiretamente por meio do diâmetro menor do fruto, que permite uma mensuração mais fácil. Os genótipos P23R ÁREA3, P30R ÁREA3, e P32R ÁREA3 são candidatos à seleção devido à presença de alelos para caracteres agrotecnológicos, que são importantes para o melhoramento da manga. Este estudo mostrou que a análise biplot é uma ferramenta valiosa para a tomada de decisão e visualização das inter-relações entre variáveis e genótipos, facilitando o processo seletivo da manga.(AU)


Assuntos
Genótipo , Seleção Genética , Melhoramento Vegetal , Mangifera/genética , Biometria
10.
Semina Ci. agr. ; 36(2): 683-692, mar.-abr. 2015. tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-30007

Resumo

Lima bean is a source of income for the rural population of Northeast Brazil because people purchase and consume the imature and mature beans. In this region, all of the germplasms used by farmers come from their own crops or they trade between rural communities. Understanding the genetic diversity of the lima bean germplasm provides important information for both managing germplasm banks and genetic conservation. In this study, we aimed to estimate the genetic diversity between 24 lima bean accessions from the Active GermplasmBank (AGB) at the Universidade Federal do Piauí (UFPI) based on morphoagronomic descriptors. The experiment was conducted under field conditions in lattice design with four replications and ten plants per plot, from February to August 2009. Seven qualitative and six quantitative descriptors were used. Four groups were created for quantitative traits using the Tocher and Unweighted Pair Group Method with Arithmetic Mean (UPGMA) methods, while qualitative traits were divided into three groups using the Tocher method and into six groups using UPGMA. The trait that contributed the most to genetic diversity (35.23%) was pod width. UFPI-220 produced a large number of pods per plant, an important trait for identifying potentially productive accessions. We expect that beneficial combinations can be made between UFPI-220 x UFPI-468 due to both the high level of...(AU)


O feijão-fava é uma alternativa de renda para a população rural do Nordeste do Brasil, que consome seus grãos verdes ou maduros. Nessa região, todo germoplasma utilizado pelos agricultores é originário de seus próprios cultivos havendo intercâmbio de sementes entre comunidades rurais. O conhecimento sobre a diversidade genética tem proporcionado importantes contribuições no gerenciamento de bancos de germoplasmas e na conservação de recursos genéticos. Neste trabalho, objetivou-se estimar a diversidade genética entre vinte quatro acessos de feijão-fava do Banco Ativo de Germoplasma (BAG) da Universidade Federal do Piauí (UFPI), com base em descritores morfoagronômicos. O experimento foi conduzido em condições de campo, em látice com quatro repetições e dez plantas por parcela, no período de fevereiro a agosto de 2009, sendo utilizados sete descritores qualitativos e seis quantitativos. Para os caracteres quantitativos foram formados quatro grupos pelos métodos de Tocher e UPGMA, enquanto que para os qualitativos formaram-se três grupos pelo método de Tocher e seis pelo UPGMA. O caráter que mais contribuiu para divergência genética (35,23%) foi largura da vagem. UFPI-220 produziu grande número de vagens por planta, característica importante na identificação de acessos potencialmente produtivos. Há expectativa de combinação promissora entre UFPI-220 x UFPI-468, em virtude da...(AU)


Assuntos
Variação Genética , Melhoramento Vegetal , Phaseolus/genética
11.
Ci. Rural ; 44(6): 1043-1049, June 2014. tab, ilus
Artigo em Português | VETINDEX | ID: vti-26898

Resumo

Estudou-se a biologia de Mahanarva fimbriolata nas gramíneas Setaria anceps cv. 'Kazungula', Brachiaria brizantha cv. 'Marandu', ecótipos BB 33, BB 39, seleções IAC-BBS 5 e IAC-BBS 8, e cana-de-açúcar. 'SP-80-1842' (testemunha) em laboratório, visando a avaliar a resistência desses genótipos a essa praga. Os parâmetros avaliados foram: mortalidade e duração da fase de ninfa, razão sexual, período de pré-oviposição, número de ovos por fêmea, longevidade, duração e viabilidade da fase embrionária. Constatou-se maior mortalidade e prolongamento na fase de ninfa em IAC-BBS 8, B. brizantha cv. 'Marandu' e S. anceps cv. 'Kazungula'. Os menores valores de longevidade e fecundidade foram verificados em IAC-BBS 8 e IAC-BBS 5 e os maiores em cana-de-açúcar. A menor viabilidade da fase embrionária foi obtida em IAC-BBS 5 e a maior em IAC-BBS 8. Segundo os resultados da tabela de vida, a taxa líquida de reprodução (Ro) e a taxa finita de crescimento () foram menores em IAC-BBS 8. Concluiu-se que IAC-BBS 8 é o genótipo mais resistente a M. fimbriolata, sendo a resistência do tipo antibiose e/ou não-preferência para alimentação.(AU)


Under controlled conditions, six forage grasses (Setaria anceps cv. 'Kazungula' and Brachiaria brizantha cv. 'Marandu'; and codified genotypes BB33, BB39; BBS 5 and BBS8), along with a control check (sugarcane cv. 'SP80-1842') were evaluated as to Mahanarva fimbriolata resistance. The following parameters have been evaluated: nymphal phase duration and mortality, sex ratio, pre-oviposition period, number of eggs per female, longevity, viability and embryonic period. The highest mortalities and longer nymphal periods occurred on BBS 8, cv. 'Marandu' and cv. 'Kazungula'. BBS5 also caused high nymph mortality, however with the shortest nymphal period. The lowest longevity and fecundity values were detected for BBS5 and BBS8, whereas the sugarcane control check revealed the highest one. As to embryonic phase viability, BBS 8 originated the highest values and BBS 5, the lowest ones. Among the tested plants, BBS 8 along with the cv. 'Marandu', proved to be the most resistant genetic material, both through antibiosis and/or nonpreference for feeding mechanism.(AU)


Assuntos
Poaceae , Pragas da Agricultura , Setaria (Planta) , Brachiaria , Saccharum
12.
Sci. agric ; 71(1): 38-43, Jan-Fev. 2014. tab, ilus, graf
Artigo em Inglês | VETINDEX | ID: biblio-1497387

Resumo

Multivariate techniques have become a useful tool for studying the phenotypic diversity of Germplasm Bank accessions, since they make it possible to combine a variety of different information from these accessions. This study aimed to characterize the phenotypic dispersion of garlic (Allium sativum L.) using two multivariate techniques with different objective functions. Twenty accessions were morphologically characterized for bulb diameter, length, and weight; number of cloves per bulb; number of leaves per plant; and leaf area. Techniques based on generalized quadratic distance of Mahalanobis, UPGMA (Unweighted Pair Group Method with Arithmetic Mean) clustering, and nMDS (nonmetrric MultiDimensional Scaling) were applied and the relative importance of variables quantified. The two multivariate techniques were capable of identifying cultivars with different characteristics, mainly regarding their classification in subgroups of common garlic or noble garlic, according to the number of cloves per bulb. The representation of the phenotypic distance of cultivars by multidimensional scaling was slightly more effective than that with UPGMA clustering.


Assuntos
Alho/genética , Variação Biológica da População , Análise Multivariada , 24444
13.
Sci. Agric. ; 71(1): 38-43, Jan-Fev. 2014. tab, ilus, graf
Artigo em Inglês | VETINDEX | ID: vti-27838

Resumo

Multivariate techniques have become a useful tool for studying the phenotypic diversity of Germplasm Bank accessions, since they make it possible to combine a variety of different information from these accessions. This study aimed to characterize the phenotypic dispersion of garlic (Allium sativum L.) using two multivariate techniques with different objective functions. Twenty accessions were morphologically characterized for bulb diameter, length, and weight; number of cloves per bulb; number of leaves per plant; and leaf area. Techniques based on generalized quadratic distance of Mahalanobis, UPGMA (Unweighted Pair Group Method with Arithmetic Mean) clustering, and nMDS (nonmetrric MultiDimensional Scaling) were applied and the relative importance of variables quantified. The two multivariate techniques were capable of identifying cultivars with different characteristics, mainly regarding their classification in subgroups of common garlic or noble garlic, according to the number of cloves per bulb. The representation of the phenotypic distance of cultivars by multidimensional scaling was slightly more effective than that with UPGMA clustering.(AU)


Assuntos
Alho/genética , Variação Biológica da População , 24444 , Análise Multivariada
14.
Hig. aliment ; 22(164): 61-66, set. 2008. tab, graf
Artigo em Português | VETINDEX | ID: vti-45354

Resumo

O comércio de alimentos prontos para o consumo por vendedores ambulantes pode se constituir num alto risco para a saúde dos consumidores, visto que as pessoas envolvidas nesta atividade geralmente não têm preparo para a manipulação correta de alimentos. Neste trabalho foram investigadas as condições de preparo e a qualidade higiênico-sanitária de lanches (cachorro-quente) comercializados por vendedores ambulantes de Limeira-SP. Foram colhidas 5 amostras de cada um dos 10 estabelecimentos centrais cadastrados na Vigilância Sanitária, coletadas em dias diferentes. Nos cachorros-quentes foram realizadas contagens de Staphylococcus coagulase positiva, Coliformes totais, Coliformes a 45°C, Clostridium sulfito-redutor, Bacillus cereus e investigada a presença de Salmonella spp. Entre as 50 amostras de cachorros-quentes analisadas, 34%estavam fora do padrão para Sta phylococcus coagulase positiva. Em nenhuma amostra foi detectada a presença de Salmonella spp. e de Clostridium sulfito-redutor. As contagens de Coliformes a 45°C e Bacillus cereus estavam dentro dos valores permitidos. Os resultados obtidos através de uma Ficha de Inspeção de Estabelecimento não foram muito satisfatórios, o que pode ter contribuído para a presença de Staphylococcus coagulase positiva em números acima dos tolerados em aproximadamente 1/3 das amostras analisadas, bem como para a presença de Coliformes fecais. Recomenda-se regulamentar a atividade de ambulantes e investir em educação e melhoria da infra-estrutura para se evitar ou minimizar riscos de toxinfecções alimentares, através do consumo de alimentos comercializados em vias públicas.(AU)


The commercialization of readymade food by street vendors can constitute a high risk to consumer's health, as the people involved in this kind of activity, generally, have no training in correct food handling. In his paper, preparation conditions and sanitary-hygienic quality of sandwiches (hot dogs) sold by street vendors in Limeira/SP were analyzed. Five samples were taken from 10 vending carts registered at Sanitary Vigilance in the central area of thetown and they were collected in different days. Counts were made on hot dog samples for Staphylococcus coagulase positive, total Coliforms, Coliforms at 45°C, Clostridium sulfite reducers, Bacillus cereus, and it was analyzed the presence of Salmonella spp. From the 50 samples of hot dogs tested, 34% did not reach the standard for Staphylococcus coagulase positive. In none of the samples was detected the presence of Salmonella spp. and Clostridium sulfite reducers. The counts on Coliforms at 45°C and Bacillus cereus were within permitted values. The results obtained through the Inspection Form were not very satisfactory, which could have contributed to the high percentage of contaminated samples with Staphylococcus coagulase positive in numbers above of the tolerated onesshowed in approximately lI3 of the analyzed samples, besides the presence of fecal Coliforms. It is recommendedto regulate the street food vending activities, invest in training and improve infrastructure to avoid or minimize risks of alimentary toxinfection in the commercialized food in public streets. (AU)


Assuntos
Alimentos de Rua , Produtos da Carne/microbiologia , Microbiologia de Alimentos , Inspeção de Alimentos , Qualidade de Produtos para o Consumidor
15.
Hig. aliment ; 22(161): 116-121, maio 2008.
Artigo em Português | VETINDEX | ID: vti-45309

Resumo

Amostras da hortaliça alface, pronta para consumo e sem adição de temperos, foram obtidas de sete restaurantes de padrão self-service, que servem refeição por quilograma. O total de 35 amostras foi coletado em dias alternados e diretamente do balcão de distribuição desses restaurantes na cidade de Limeira-SP. As amostras foram analisadas com o objetivo de conhecer as condições microbiológicas de hortaliças folhosas cruas servidas em locais de mesmo padrão. Para a realização das análises foram estabelecidos parâmetros microbiológicos, considerando a pesquisa das seguintes bactérias: coliformes totais, coliformes a 45°C, Salmonella spp, contagem total de aeróbios mesófilos e Saphylococcus coagulase positiva. Os resultados foram bastante heterogêneos, com grande variação nas contagens para coliformes totais, coliformes a 45°C, e números elevados nas contagens de aeróbios mesófilos. (...) Pelos resultados obtidos, considera-se que há falhas decorrentes de práticas inadequadas de manipulação com ausência ou deficiência de sanificação, sendo necessário treinamento de funcionários e proprietários dos locais, visando correção dos problemas, para que se obtenha a qualidade microbiológica adequada do produto e assegure a saúde do consumidor.(AU)


Lettuce samples, ready for consumption and without addition of seasoning, were obtained from seven self-service restaurants which serve food per kilogram. The total of35 samples was collected on alternate days and directly from food counters at those restaurants in the city of Limeira/SP. Samples were analyzed with the objective to find out the microbiological conditions of the raw leafy vegetables served in self-service restaurants. To carry out the analysis, microbiological standards were set considering the research on the following bacteria: total coliforms, coliforms at 45°e, Salmonella spp, total counting of aerobic mesophiles and Staphylococcus coagulase positive. The results were very heterogeneous due to the great variation on counting for total coliforms, coliforms at 45°C, as well as thehigh level of the numbers of aerobic mesophiles. (…)The results showed reduction of the bacteria countingbetween 98% and 99%. The data obtained show that there is inappropriate food handling with absence of or deficiency of .sanitation; indicating a training need for the staff and shop owners, so that problems can be corrected to obtain products with appropriate microbiological quality and to assure consumer's health. (AU)


Assuntos
Lactuca/microbiologia , Restaurantes , Higiene dos Alimentos , Microbiologia de Alimentos , Contaminação de Alimentos , Coliformes , Qualidade de Produtos para o Consumidor , Brasil
16.
Semina ciênc. agrar ; 36(2): 683-692, 2015. tab, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1499886

Resumo

Lima bean is a source of income for the rural population of Northeast Brazil because people purchase and consume the imature and mature beans. In this region, all of the germplasms used by farmers come from their own crops or they trade between rural communities. Understanding the genetic diversity of the lima bean germplasm provides important information for both managing germplasm banks and genetic conservation. In this study, we aimed to estimate the genetic diversity between 24 lima bean accessions from the Active GermplasmBank (AGB) at the Universidade Federal do Piauí (UFPI) based on morphoagronomic descriptors. The experiment was conducted under field conditions in lattice design with four replications and ten plants per plot, from February to August 2009. Seven qualitative and six quantitative descriptors were used. Four groups were created for quantitative traits using the Tocher and Unweighted Pair Group Method with Arithmetic Mean (UPGMA) methods, while qualitative traits were divided into three groups using the Tocher method and into six groups using UPGMA. The trait that contributed the most to genetic diversity (35.23%) was pod width. UFPI-220 produced a large number of pods per plant, an important trait for identifying potentially productive accessions. We expect that beneficial combinations can be made between UFPI-220 x UFPI-468 due to both the high level of...


O feijão-fava é uma alternativa de renda para a população rural do Nordeste do Brasil, que consome seus grãos verdes ou maduros. Nessa região, todo germoplasma utilizado pelos agricultores é originário de seus próprios cultivos havendo intercâmbio de sementes entre comunidades rurais. O conhecimento sobre a diversidade genética tem proporcionado importantes contribuições no gerenciamento de bancos de germoplasmas e na conservação de recursos genéticos. Neste trabalho, objetivou-se estimar a diversidade genética entre vinte quatro acessos de feijão-fava do Banco Ativo de Germoplasma (BAG) da Universidade Federal do Piauí (UFPI), com base em descritores morfoagronômicos. O experimento foi conduzido em condições de campo, em látice com quatro repetições e dez plantas por parcela, no período de fevereiro a agosto de 2009, sendo utilizados sete descritores qualitativos e seis quantitativos. Para os caracteres quantitativos foram formados quatro grupos pelos métodos de Tocher e UPGMA, enquanto que para os qualitativos formaram-se três grupos pelo método de Tocher e seis pelo UPGMA. O caráter que mais contribuiu para divergência genética (35,23%) foi largura da vagem. UFPI-220 produziu grande número de vagens por planta, característica importante na identificação de acessos potencialmente produtivos. Há expectativa de combinação promissora entre UFPI-220 x UFPI-468, em virtude da...


Assuntos
Melhoramento Vegetal , Phaseolus/genética , Variação Genética
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