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| Registros recuperados: 200 | |
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| Askar, A.I.; Ibrahim, G.H.; Osman, K.A.. |
| Nonpoint source (NPS) pollution from agriculture is the leading source of impairment to Survey Rivers and lakes. Pesticides are one of the major NPS pollutants that result from agricultural activities. Among those pesticides, is Bromoxynil (BRMX) which is a widely used herbicide. The present study was carried out to determine the capability of selected biological control agents to degrade BRMX at different incubation periods. Microbial degradation of BRMX at the rate of 100 ppm in pure liquid culture media of either seven isolates of bacteria; Azotobacter chroococcum, Azospirillium barasilense, Klebsilense pneumoneae, Pseudomonas cepacia, Pseudomonas fluoresences, Bacillus subtilis, and Bacillus polymyxa or two isolates of fungi; Trichoderma viride and... |
| Tipo: Journal Contribution |
Palavras-chave: Laboratory Study; Biodegradation; Pollution; Biodegradation; Pollution; Http://aims.fao.org/aos/agrovoc/c_9261; Http://aims.fao.org/aos/agrovoc/c_6077. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2200 |
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| Díaz Rojas, Martín. |
| La contaminación del aire en espacios de intramuros es considerada como una amenaza para la salud. Recientes estudios han demostrado que una variedad de plantas de interior pueden remover diversos contaminantes del aire. Ante esta problemática, es importante conocer el tipo y concentración de esporas fúngicas dispersas en el aire, responsables de enfermedades en el hombre y la influencia que pueden tener las plantas en áreas de intramuro. Se muestrearon esporas de hongos aéreas en 3 oficinas ubicadas en el edificio de documentación y biblioteca del Colegio de Postgraduados Campus Montecillo, México. Dos etapas se contemplaron: la primera sin plantas y la segunda con plantas. El trabajo de campo se realizó durante tres semanas del 12 al 16 de marzo; 16 al... |
| Tipo: Tesis |
Palavras-chave: Contaminación; Aire; Ornamentales; Deuteromicetos; Andersen; Pollution; Air; Ornamental; Deuteromicetos. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1176 |
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| Rodriguez de Morán, A.. |
| The current research was developed in Bahia of Jaramijó in the Province of Manabí during 2008, as part of the major project: " Characterization of the Ecuadorian Coast" that has been developing by INOCAR, in order to contribute to the proper use of resources and the environment. It characterized and assesses the results obtained in the research of the quality of water of Bahía of Jaramijó, taking into consideration the averages and their behaviour in each level studied in two different season in the year (wet-dry) and in two tide condition (ebb and flow) of the different parameter physical, chemical and microbiological. During the research was established that coastal marine waters of Bahía of Jaramijó, not show pollution of organic origin neither... |
| Tipo: Journal Contribution |
Palavras-chave: Water quality; Environmental legislation; Bacteria; Pollution; Oxygen. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5758 |
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| Michel, Pierre. |
| Standard methods were used to assess the effectiveness of 101 products for use against oil slicks. Products were emulsifiers, agglomerants or precipitants and were tested against oil from Edjele, Kuwait and Syria. For each kind of product, a review is given of the previous tests, the choice of methods is discussed, the methodology is described, and results are presented and interpreted. In addition, the relationship between physical properties and effectiveness is discussed, with graphical examples and the advantages and disadvantages are indicated. It is concluded that at present no 'miracle' product exists for use in this field. Agglomerating powders would be ideal were it not for problems in putting them to use, and, wind because of the need to use them... |
| Tipo: Text |
Palavras-chave: Efficiency; Choice of products; Oil spills; Pollution. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2072.pdf |
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| Alzieu, Claude. |
| The necessity to combat oil slicks makes it necessary to assess the relative effectiveness and toxicity of dispersal agents used. This is usually done by using individual or groups of indicator organisms. The theory behind the various approaches is outlined, and some considerations are listed for the choice of technique. 2 organisms were chosen - the Portuguese oyster (Crassostrea), and the phytoplankton alga Phaeodactylum tricornutum Bohlin, on which if feeds - and the oyster closing reaction, and level of inhibition of growth under the influence of irritant products was measured. Methods are described, and the results shown for emulsifying, agglomerating and precipitating products. The results are discussed, and the mode of interference of the products... |
| Tipo: Text |
Palavras-chave: Choice of technique; Phytoplankton; Organisms; Toxicity; Oil spills; Pollution. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2073.pdf |
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| Soudan, France. |
| Following the Torrey Canyon disaster, attention was directed to finding effective but innocuous means to combat the pollution risk of shipping oil. To introduce the minimum of chemicals into the sea, it was decided to use a little of a strong, but possibly more harmful, substance rather than more of a weaker and less offensive one. Marine life could be affected mechanically, chemically or by removal or dissolved O sub(2). Various products were tested under laboratory conditions for effectiveness, and possible effects on marine life. It is noted that the latter is only a short-term view, and that different results might be obtained using different species as indicators. The range of effectiveness of products was considered. It was concluded that low density... |
| Tipo: Text |
Palavras-chave: Results; Torrey Canyon; Choice; Oil spills; Pollution. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2071.pdf |
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| Maggi, Pierre. |
| Toxicity of seven emulsifying agents for treating oil spills (ISTPM designation E sub(22), E sub(30), E sub(41), E sub(46), E sub(47), E sub(52) and E sub(53)) was determined using eight marine species (three gastropods, one bivalve, two crustacean and one fish). Results are tabulated as LD sub(50). E sub(47) was least toxic to the species studied, but it could still perhaps harm other plant and animal species. |
| Tipo: Text |
Palavras-chave: Treatment; Pollution; Oil spills; Toxicity. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2074.pdf |
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| Gomes,Silvânia M. de S.; Lima,Vera Lucia A. de; Souza,Adailson P. de; Nascimento,Joab J. V. R. do; Nascimento,Everaldo S. do. |
| Plants respond to environmental adversities, becoming an indicator for assessing the environment quality. In this aspect, chlorophyll contents as well, carotenoids are used as a reliable indicator to associate environmental quality and pollution, mainly regarding the toxicity of heavy metals in higher plants. So, we aimed to evaluate the content of chlorophyll a, b, and total chlorophylls and carotenoids in plants vetiver [Vetiveria zizanioides (L.) Nash], maize (Zea mays L.) cv. AG 1051, sunflower (Helianthus annuus L.) cv. BRS 122/V-2000, and castor beans (Ricinus communis L. ) cv . Northeastern BRS grown in contaminated soil with lead, with and without correction of soil pH, so they were used as indicators of metal stress by the soil. From the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Pollution; Photosynthesis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500007 |
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| Loa Loza, Eleazar. |
| Para determinar la concentración de DDT y sus metabolitos en ejemplares de cocodrilos (Crocodylus acutus y C. moreletii), durante el período de junio a diciembre de 2004 se tomaron 80 muestras de sangre en 37 localidades de 13 estados de la zona costera de México. En algunos de estos sitios, ha sido aplicado el DDT para el control del vector del paludismo. Las muestras fueron procesadas en el laboratorio mediante cromatografía de gases con detector de captura de electrones. Se realizó un análisis de regresión lineal simple entre la longitud y el peso de los cocodrilos. Para comparar las concentraciones de DDT en sangre en función de la longitud y peso de los cocodrilos en las provincias biogeográficas, se realizó el análisis de varianza utilizando un... |
| Tipo: Tesis |
Palavras-chave: Reptiles; Crocodylus acutus; C. moreletii; DDT; Pesticidas; Contaminación; Maestría; Ganadería; Reptiles; Pesticide; Pollution. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1565 |
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| Regadera, R.; Gómez, Y.; García, E.; Gómez, L.. |
| It is presented an analysis of several indicators of water quality in Santiago de Cuba bay and of the bacteriological state in five of its beaches. Samples were taken in surface and 8 m deep. A low transparency of the waters was detected, associated with high levels of ammonium, total phosphorus and chlorophyll. In surface the dissolved oxygen had high levels, but in 8 m there was anoxia in the most interior stations. The thermotolerant coliforms reached high concentrations in the stations of the central axis, but in the beahes, only El Níspero was not appropriate for direct contact, in accordance with the current cuban standard. By means of a principal components analysis it was determined that high ammonium and total phosphorus concentrations were... |
| Tipo: Preprint |
Palavras-chave: Eutrophication; Nutrients (mineral); Pollution; Eutrophication; Pollution; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_6077. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3572 |
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| Registros recuperados: 200 | |
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