Términos relacionados

969 resultados encontrados para: TEMA: Contaminación
  • «
  • 1 de 97
  • »
1.
Libro
El ambiente de la comunidad: el aire, el agua, los alimentos, el suelo y las tierras
s. l. : s. n. , s. f
Clasificación: 614.7 / A4
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAA001244 (Disponible)
Disponibles para prestamo: 1

2.
Libro
La contaminación del aire y del suelo / Secretaría de Desarrollo Urbano y Ecología
México. Secretaría de Desarrollo Urbano y Ecología. Subsecretaría de Ecología ;
México : Secretaría de Desarrollo Urbano y Ecología , s. f
Clasificación: F/333.714 / M4
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAF001065 (Disponible)
Disponibles para prestamo: 1

3.
Libro
La economía de la protección ambiental
Biblioteca Benjamín Franklin [México] ;
México : Biblioteca "Benjamín Franklin" , s. f
Clasificación: C/333.72 / B5
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAC000004 (Disponible)
Disponibles para prestamo: 1

4.
- Tesis
PDF
Índice

1. Introduction
2. Background information
2.1. Glyphosate
2.2. Problem description
3. Materials and methods
3.1. Study area
3.2. Sampling methods
3.3. Sample collection
3.4. Sample preparation
3.5. Glyphosate and AMPA determination
3.6. Statistical analysis
4. Results
4.1. Glyphosate in soil samples
4.2. AMPA in soil samples
5. Discussion
6. Conclusions
7. References
8. Annex
Annex 1. Description and coordinates of the monoliths
Annex 2. Glyphosate and AMPA concentrations (μg g-1) for soil and plant samples
Annex 3. Results of Shapiro-Wilk test for AMPA concertation in soil samples
Annex 4. Results of Mann-Whitney U test for AMPA concertation in soil samples


5.
Libro
Investigación para el desarrollo regional sur: Chiapas, Guerrero y Oaxaca
Toledo Flores, Javier (editor) ;
Distrito Federal, México : Consejo Nacional de Ciencia y Tecnología :: Sistema de Investigación Benito Juárez , s.f.
Clasificación: CH/307.12097275 / I5
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
ECO010012034 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020012039 (Disponible) , ECO020012038 (Disponible)
Disponibles para prestamo: 2

6.
Libro
Ley general del equilibrio ecológico y la protección al ambiente: análisis de la reforma de 1996 / Emilio Dardón Bravo
Dardón Bravo, Emilio ;
México : Mundi Comunicaciones , s.f.
Clasificación: 346.044 / D3
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020009332 (Disponible)
Disponibles para prestamo: 1

7.
Libro
Lineamientos y criterios para la selección y desarrollo de índices e indicadores ambientales / Secretaría de Desarrollo Urbano y Ecología
México. Secretaría de Desarrollo Urbano y Ecología ;
México : Secretaría de Desarrollo Urbano y Ecología , s. f
Clasificación: F/333.718 / M4
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAF001060 (Disponible)
Disponibles para prestamo: 1

8.
Artículo
*Solicítelo con su bibliotecario/a
Distribution of metals in tissues of captive and wild Morelet's crocodiles and the potential of metallothioneins in blood fractions as a biomarker of metal exposure
Buenfil Rojas, Asela Marisol (autora) ; Álvarez Legorreta, Teresa (autora) ; Cedeño Vázquez, J. R. (autor) ; Rendón von Osten, Jaime (autor) ; González Jáuregui, Mauricio (autor) ;
Disponible en línea
Contenido en: Chemosphere Vol. 244, 125551 (April 2020), p. 1-10 ISSN: 0045-6535
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The distribution of Hg, Cd, Cu, and Zn in keratinized tissues, blood fractions, and excretory organs, and MTs in blood fractions and excretory organs was determined in captive, semicaptive, and wild Morelet’s crocodiles and they were compared to select the most useful non-destructive tissues for the monitoringof metal exposure and to assess the potential of MTs as a biomarker. Our results indicate blood plasma, claws, and caudal scutes altogether are suitable tissues for xenobiotic metals exposure, with concentrations in blood plasma being an indicator of recent exposure, whereas concentrations in claws and caudal scutes are indicators of chronic exposure. Results in keratinized tissues suggest they are an important detoxification strategy in crocodiles, and claws presented the highest concentrations of metals in both captive (Hg = 0.44 ± 0.23 μg g−¹, Cd = 11.10±5.89 μg g−¹, Cu = 45.98±23.18 μg g−¹, Zn = 124.75±75.84 μg g−¹) and wild populations (Hg = 1.31±0.32 μg g−¹, Cd = 26.47±21.15 μg g−¹, Cu = 191.75±165.91 μg g−¹, Zn = 265.81±90.62 μg g−¹). Thus, they are an appropriate tool for assessing metal exposure in populations where scutes clipping as a marking technique is not allowed, and their collection is less complicated than with other tissues. MTs are a suitable biomarker in blood plasma, whereas in erythrocytes detoxification processes might depend on hemoglobin, rather than MTs. Future studies should consider the implementation of these tools for the monitoring of wild populations.


9.
Artículo
PDF
Resumen en: Inglés |
Resumen en inglés

An emerging disturbance for Caribbean reefs is the massive arrival of pelagic Sargassum, which deteriorates water quality due to the production of leachates. The highest arrivals of Sargassum took place when broadcasting corals spawned. We experimentally determined the effect of Sargassum leachates on swimming behavior of Acropora palmata larvae through five treatments (control, stain (simulating 100% leachate color), and 25%, 50% and 100% Sargassum leachate concentrations) during 30 min (10 min of videos and 20 min of post-observations). In the videos, larvae with leachates reduced swimming speed, were positively geotactic, the percentage of individuals that swam in a spiral pattern increased, and most behavioral displacements occurred at lower frequencies than larvae without leachates. Moreover, symptomatic spiral behavior was higher in the presence of leachates, suggesting that this behavior may be an effect of pollution. During post-observations, most larvae with leachates were motionless. This is the first time that Sargassum leachates have been documented modifying larval swimming behavior, which may reduce larval dispersion and genetic diversity. We suggest that a future evaluation of the effects of leachates at lower concentrations and over longer periods of exposure is needed. The resilience of corals may be compromised if Sargassum arrivals become frequent events.


10.
- Capítulo de libro con arbitraje
*Solicítelo con su bibliotecario/a
Phytoremediation of soils contaminated by hydrocarbon
Chan Quijano, José Guadalupe (autor) ; Cach Pérez, Manuel Jesús (autor) ; Rodríguez Robles, Ulises (autor) ;
Disponible en línea
Contenido en: Phytoremediation: in-situ applications / editor: Brian R. Shmaefsky Geneva, Switzerland : Springer Nature Switzerland AG, 2019, 2020 páginas 83-101 ISBN:978-3-030-00098-1
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

It is estimated that more than one-third of the world soils are seriously contaminated due to anthropological activities. Much of this contamination is due to oil industry activities which cause significant changes in the ecosystems due to the processes of exploration, refining, transportation and commercialization of products derived from oil. Plants have become biotechnologies for the recovery of hydrocarbon-contaminated soils given that they can absorb and degrade significant amounts of the pollutants. Most plants live in symbiosis with ectomycorrhizal fungi and/or arbuscular mycorrhizas that can facilitate the remediation of contaminated soils. In addition, rhizosphere microorganisms such as bacteria, fungi and nematodes have the ability to consume hydrocarbons as sources of energy and carbon, thereby playing a very important role in the remediation of contaminated soils. The remediation of areas contaminated with oil hydrocarbons is making it necessary to conduct studies on each contaminant regarding the damages and/or benefits theymay be causing in the rhizosphere and in plant physiology.