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  1. Diario de la marina
  2. Bosch GSA 18V-32 (06016A8102) User Manual [ru]

Behavioral changes in swimming activities and responses to stimuli appear to influence predation risk in the contaminant -exposed population. Significant changes in bioenergetics in the contaminated habitat, evident as abnormally high energetic expenditures for survival maintenance costs, may ultimately influence production pathways growth, energy storage in individuals.

We then present a conceptual model to examine how interactions among the affected systems morphological, behavioral, physiological may ultimately bring about more severe effects than would be predicted if the responses were considered in isolation. A complex interplay among simultaneously occurring biological changes emerges in which multiple, sublethal effects ultimately can translate into reductions in larval or juvenile survival, and thus reduced recruitment of juveniles into the population. In systems where individuals are exposed to low concentrations of.

Immunotoxicological effects of environmental contaminants on marine bivalves. Coastal areas are complex environments frequently contaminated by numerous pollutants that represent a potential threat to marine organisms, especially bivalves. These pollutants may have major ecological consequences. Although effects of different environmental contaminants on the immune system in marine bivalves have been already reported, a few of reviews summarizes these effects. The main purpose of this chapter relies on summarizing recent body of data on immunotoxicity in bivalves subjected to contaminants.

Immune effects of heavy metals, pesticides, HAP, PCB and pharmaceuticals are presented and discussed and a particular section is devoted to nanoparticle effects. A large body of literature is now available on this topic.


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Finally, the urgent need of a better understanding of complex interactions between contaminants , marine bivalves and infectious diseases is noticed. Prebióticos y su efecto en la biod sponibilidad del calcio Prebiotics and their effect on calcium bioavailability. El aumento de la expectativa de vida de la población y el incremento de enfermedades como la osteoporosis traen graves consecuencias a la salud del individuo, acarreando importantes desembolsos económicos.

En esta revisión se condensa el conocimiento presente sobre el efecto fisiológico del consumo de carbohidratos prebióticos y su posible interferencia en la biodisponibilidad del Ca, como también las posibilidades de su empleo en estrategias para combatir las deficiencias del mineral. The increased life expectancy and prevalence of non-communicable chronic diseases have serious health and economic consequences on the population.

Among the useful tools for preventing osteoporosis, prebiotics are thought to be an effective , healthy and relatively cheap way of optimizing calcium absorption. The objective of this review was to summarize the present knowledge on the physiological effects of prebiotic carbohydrate consumption and its possible interference with calcium bioavailability.

The possibility of using prebiotics to fight calcium deficiency was also assessed. The keywords calcium, prebiotics and probiotics were used to search the PubMed, Lilacs and SciELO databases for the most significant original studies on the subject published in the last 6 years. Efecto del enriquecimiento con nutrientes en la degradación de clorpirifos, malatión y metil paratión Inorganic nutrients effect addition over the chlorpyrifos, malathion and methyl parathion degradation. Full Text Available Con el fin de evaluar el efecto del enriquecimiento con nutrientes una sal de fósforo o un fertilizante comercial con N, P y K como alternativa para mejorar la capacidad de degradación de los microorganismos en una matriz sólida, contaminada con los pesticidas organofosforados: clorpirifos, malatión y metil paratión, se realizaron experimentos de cultivo bajo condiciones controladas de oscuridad, temperatura y humedad por 30 días.

En todos los tratamientos hubo degradación de los pesticidas; sin embargo, en el tratamiento con fósforo los tiempos para degradar el clorpirifos y el metil paratión fueron mayores. La presencia de los pesticidas no generó efectos tóxicos detectables sobre la microflora en ninguno de los tratamientos evaluados.

La actividad biológica de las matrices no presentó una relación directa con la capacidad de degradación. In order to evaluate the effect of inorganic nutrient addition phosphorus or commercial fertilizer over the microbial degradation capacity present in a solid matrix contaminated with chlorpyrifos, malathion and methyl parathion, microcosms assays were held under controlled conditions of light, moisture and temperature for 30 days.

Results showed that even though three treatments microorganisms were able to degrade the three organophosphorus pesticides, microorganisms of phosphorus-enrichment treatment were less efficient to degrade Chlorpyrifos and Methyl Parathion than microorganisms of Fertilizer-enrichment treatment. It was not observed a direct relation between mineralization and microbial pesticides degradation capacity. The microbial activity was not affected by the presence of organophosphorus pesticides. Full Text Available The physical parameters of sound amplitude, frequency and phase are received by the human senses as loudness, pitch, timbre and duration.

The interest focuses on determining the threshold between the use of sound as a communication tool and enjoy and its conversion into an element of aggression.

Noise pollutant pressure acoustic waves impact in the ear when its intensity exceeds its defensive mechanisms and cause hearing loss typically affecting the 4, Hz. But still there are some extra-auditory pathways to the hippocampus and reticuloendothelial system, responsible for the other noise effects such as physical-somatic cardiovascular, hormonal, respiratory, sleep, gastrointestinal, emotional, psychological discomfort, alterations in the learning and performance and psychiatric problems.

The component of the low-frequency vibration noise causes discomfort and disorders too. El interés se centra en determinar el umbral entre la utilización de los sonidos como herramienta de comunicación y disfrute y su conversión en elemento de agresión. El componente vibratorio de las bajas frecuencias sonoras también es causa de malestar y enfermedades.

Drought-induced effects on contaminant distribution. The drought in California has caused significant redistribution of contaminants , particularly petroleum hydrocarbon and VOCs, at known hazardous waste sites.

Free-floating petroleum hydrocarbon on the water table has been particularly susceptible to redistribution because it is easily removed by soil sorption. Sorption of petroleum hydrocarbon and VOCs onto the soil can result in soil hydrocarbon concentrations above the regulatory action levels requiring soil remediation.

In this paper, the application of modifying an existing remedial action plan is illustrated by a case study involving the Atwater Elementary School site in Atwater, California. Additional extraction wells were installed and seventeen monitoring wells were installed into three discrete aquifers to evaluate the extent of hydrocarbon- contaminated groundwater to be treated after removal of the product layer.

Diario de la marina

Poultry manure effects on soil organisms; Efectos de los residuos avicolas sobre los organismos del suelo. A study has been made to value the effects produces on the organisms of the ground plants, invertebrates and microorganisms , after the application of two types of poultry manure bed wood shaving or straw on an agricultural ground. The use doses respond to agronomic and non environmental considerations. Author 1 refs.

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Biological radiation effects of Radon in Drosophila; Efectos biologicos del radon en Drosophila. In order to contribute to the knowledge on the effects of radon and its decay products, the aim of this investigation is to study the biological effects of radon using Drosophila melanogaster throught the somatic mutation and recombination test SMART and the analysis of some adaptative factors exposing larvaes to controlled radon atmosphers, considering that this insect could be used as biological monitor.

It was reflected in the significant decrease on fecundity of the generation exposed.

Bosch GSA 18V-32 (06016A8102) User Manual [ru]

These data agree with the Hormesis hypothesis that says: low doses have positive effects on health. It was not possible to obtain a dose- effect relationship except with the develop velocity where it was found a dose- effect inverse proportion. In conclusion, Drosophila melanogaster could be a good system to obtain in vivo damaged induction concentration dependent of radon and its decay products, as well as to study the effects in an exposed population by the analysis of adaptative factors.

Large blastholes in coal mining, canal effects. Barrenos largos en la mineria del carbon, efecto canal. Muniz Hevia, E. The 'canal effect ' has been known for a long time. It appears only in underground workings. It may be said that the coal industry has suffered from it less than other sectors, perhaps because of its rigorous safety legislation. The Spanish coal mining industry has now been without this phenomenon for many years. Resuspended contaminated sediments cause sublethal stress to oysters: A biomarker differentiates total suspended solids and contaminant effects.

Resuspended contaminated sediments represent an important route of contaminant exposure for aquatic organisms. During resuspension events, filter-feeding organisms are exposed to contaminants , in both the dissolved form at the gills and the particulate form in the digestive system. In addition, these organisms must manage the physical stress associated with an increase in total suspended solids TSS. To date, few studies have experimentally compared the contributions to biological stress of contaminated and clean suspended solids.

The authors mixed field-collected sediments cellular biomarkers lysosomal membrane stability, lipid peroxidation, and glutathione were measured to evaluate sublethal toxicity. Lysosomal membrane stability was the most sensitive biomarker for distinguishing effects from resuspended contaminated sediments, as increasing amounts of contaminated TSS increased lysosomal membrane destabilization. The authors' results illustrate the importance of considering contaminant exposures from resuspended sediments when assessing the toxicity of contaminants to aquatic organisms.

Biological effects of radon in Drosophila; Efectos biologicos del radon en Drosophila. The main objective of this investigation, is to study the biological effects of the Radon at low dose in 'Drosophila melanogaster'. It is necessary to mention that these effects will analyze from the genetic point of view for: 1 To evaluate in which form the Radon to low dose it influences in some genetic components of the adaptation in Drosophila, such as: fecundity, viability egg-adult and sex proportion. The carried out investigation was divided in three stages: 1.

Tests to the vacuum resistance. Test of somatic mutation, and 3. Determination of the presence of radon daughters on the adult of Drosophila. It is necessary to point out that all the experiments were made by triplicate and in each one of them was placed detectors in preset places.