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| Ávila-Quezada,G; Sánchez,E; Muñoz,E; Martínez,LR; Villalobos,E. |
| El objetivo del presente trabajo fue determinar la calidad microbiológica de las frutas y hortalizas más importantes en el estado de Chihuahua (México) para conocer los posibles riesgos y aplicar estrategias de prevención previo a su consumo. Muestras de chile jalapeño, chilaca y serrano, melón, tomate saladet, tomate grape, durazno y manzana Golden y Starkimson y de agua de pozo, de canal, de riego, de consumo y de lavado en empaque se analizaron para determinar Salmonella spp., Escherichia coli, coliformes totales y fecales, hongos y levaduras con la metodología marcada en la normatividad mexicana (NOM-111-SSA1-1994). El muestreo se realizó en todo el estado de Chihuahua durante el ciclo de producción 2004. Los resultados sugieren acciones correctivas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inocuidad alimentaria; Patógeno; Frutas y hortalizas. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572008000100011 |
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| Hermosillo-Cereceres,MA; Sánchez,E; Muñoz-Márquez,E; Guevara-Aguilar,A; García-Bañuelos,M; Ojeda-Barrios,D. |
| Selenium (Se) is an essential element for many organisms, although in high concentrations it may become toxic, leading to the generation of reactive oxygen species (ROS). In this study, bean plants received different application rates of Se (0, 10, 20, 40, 80, and 160 μM) in the form of selenite and selenate to evaluate the activity of the detoxifying enzymes of H2O2. The results indicated that the activity of these enzymes in bean plants depended on the chemical form of Se: selenite at rates of 20 μM or greater diminished biomass and yield, increasing the activity of superoxide dismutase (SOD). Even when catalase (CAT) activity also increased, it appeared that it was efcient at detoxifying H2O2 in the presence of Se, given also the rise... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L; Green bean; Biofortification; Selenium. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200017 |
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| Sánchez,E; Ávila-Quezada,G; Gardea,AA; Ruiz,JM; Romero,L. |
| The objective of this work was to determine the effect of deficiency versus toxicity of N on biosynthesis of proline in fruits of green bean plants (Phaseolus vulgaris L. cv. Strike). Nitrogen was applied to the nutritive solution in the form of NH4NO3 at 1.5 mM (N1), 3.0 mM (N2), 6.0 mM (N3, optimal level), 12.0 mM (N4), 18.0 mM (N5), and 24.0 mM (N6). Nitrogen deficiency (N1 and N2) was characterized by having lower proline accumulation in pods and seeds, mainly because proline degradation was stimulated by the enzyme proline dehydrogenase. On the other hand, N toxicity (N4, N5, and N6) was characterized for accumulation of greater amounts of proline in pods and seeds due primarily to the greater activity of the enzyme... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L; Proline metabolism; Green bean; Nitrogen; Deficiency; Toxicity. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100013 |
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| Hernández-Cruz,AE; Sánchez,E; Preciado-Rangel,P; García-Bañuelos,M L; Palomo-Gil,A; Espinoza-Banda,A. |
| In the production of cotton (Gossypium hirsutum L.), nitrogen fertilization is one of the most costly crop practices, but important to reach high yields. However, high nitrogen (N) content in plants does not always translate into a high fibre production. One way of assessing the efciency of the N fertilizer is through the enzymatic activity of the nitrate reductase (NR). This is a key enzyme in N assimilation, whose activity is regulated by a number of endogenous and exogenous factors that determine yield. The aim of this study was to assess the efect of N fertilization on yield, fibre quality, biomass, and NR enzymatic activity in vivo in the cotton variety Fiber Max 989. The evaluated application rates were 0, 50, 100, and 150 kg/ha of N, using urea as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum L; Nitrogen assimilation; Yield. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200026 |
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| R,Salinas; Sánchez,E; Ruíz,JM; Lao,MT; Romero,L. |
| El objetivo del presente trabajo fue determinar el impacto de la deficiencia de fósforo, el nivel adecuado o la toxicidad de este macronutriente en la producción de biomasa total y el rendimiento en judía verde (Phaseolus vulgaris L.) cv. 'Strike'. El experimento se realizó en cámara de cultivo, en macetas con sustrato (vermiculita). Los niveles de fósforo en la solución nutritiva fueron: P1: 0,5 mM; P2: 1 mM; P3: 2 mM; P4: 4 mM; P5: 6 mM, y P6: 8 mM. La concentración P3 (2 mM) fue considerada como la óptima. La influencia del fósforo fue significativa, provocando un aumento progresivo en la concentración total de este elemento en la planta. Con el tratamiento P6 se obtuvo la mayor concentración de fósforo en la planta y con P1 la más baja. Los resultados... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fósforo; Deficiencia; Toxicidad; Solución nutritiva; Rendimientos. |
| Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000100005 |
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| Ben Chekroun,K; Moumen,A; Rezzoum,N; Sánchez,E; Baghour,M. |
| The Aquatic system contamination by organic pollutants and heavy metals is one of the most serious problems that might face the environment and organisms as a whole. Interestingly, the accumulation of these pollutants is due to the anthropogenic activity, namely the intensive use of fertilizers to obtain high yields in crop production. In this paper, we compared the levels of chlorophylls, proteins, dry weight and sucrose in some red (Alsidium sp. and Gracilaria sp.) and green algae (Ulva sp.) collected from Mohandis, near Kariat and Bou Areg. Our results indicate that the algae collected nearby Bou Areg, an area well-known for its high agricultural activity, contained high levels of pigments, proteins and sugars. From the chlorophyll results, we conclude... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Biomonitoring; Carbohydrates; Nador lagoon; Phytoremediation; Pigments; Pollution; Proteins. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100005 |
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