Indiscriminate disposal of residues of domestic and/or industrial origin in aquatic ecosystems resulting from urban activities causes concern about their effects on the fauna. Substances absorbed by animals, such as t...Indiscriminate disposal of residues of domestic and/or industrial origin in aquatic ecosystems resulting from urban activities causes concern about their effects on the fauna. Substances absorbed by animals, such as those cited above, are metabolized by the liver, as it is the main target organ of several pollutants and also exercises basic vital functions in the organism. For this reason the liver is used as the main and most reliable biomarker in environmental studies. Thus the objective of the present study was to identify hepatic alterations resulting from exposure to water contaminated by a few commercial brands of biodegradable detergents and their effects when present together with several other contaminants found in nature. For such, a solution of 1 ppm of biodegradable detergents and water from an urban lake were tested on two widely distributed native Brazilian fish (Astyanax altiparanae and Prochilodus lineatus). Several alterations were found on the liver, including cytoplasm vacuolization, nuclear displacement, macrophage recruitment and reduced liver glycogen, showing a degenerative process in the liver of the fish, due to the action of contaminants.展开更多
Fish populations are sensitive to environmental impact resulting from many factors, as an introduction of exotic species, industrial or residual waste, oil spills, pesticides or other agents that can directly affect t...Fish populations are sensitive to environmental impact resulting from many factors, as an introduction of exotic species, industrial or residual waste, oil spills, pesticides or other agents that can directly affect the ecology and species survival. Astyanax altiparanae is pelagic and active swimmer specie and can have serious implications on its way of life as changes in muscle structure of fish may occur since the presence of pollutants in the water. In this study we analyze the alterations in Muscle and collagen fibers of the pectoral muscles and pollutants exposed flows contained in water with biodegradable detergents, and water coming from the Blue Lake, River clear-SP (2o24'39"S, 47o33'39"E) diluted. Effects of these exposures were analyzed during the period of seven and thirty days. Compared with acclimatized fish (Astyanax altiparanae) with pure water from an artesian well, the muscle fibers morphology and collagen concentration on them have changed due to the exposure to urban pollutants and biodegradable detergents.展开更多
Objective: The purpose of this study was to investigate the presence of postural imbalances, which can interfere with the mandible position and affect the actions of the stomatognathic system. Materials and Methods: F...Objective: The purpose of this study was to investigate the presence of postural imbalances, which can interfere with the mandible position and affect the actions of the stomatognathic system. Materials and Methods: Forty men, aged between 23 to 29 years, were selected and divided into two groups: Group I comprised 20 healthy individuals with no clinical postural change diagnosis;Group II, 20 individuals who had ACL surgical, unilateral with patellar tendon graft, paired individual to individual (age and weight). All of them were submitted to an electromyography in different clinical conditions. In addition, a condylar biomechanical assessment was performed through videogrametry. Results: In electromyography and videogrametry, a normal standard biomechanical was observed for both groups, however, Group GII—Ligamentplasty presented an inhibition of the masticatory muscles and decreased joint kinesthetic. Conclusion: Based on the results obtained, it was concluded that after the reconstruction of the ACL, individuals presented changes in the stomatog-nathic system.展开更多
基金FAPESP process number:2009/17118-9 for financial support
文摘Indiscriminate disposal of residues of domestic and/or industrial origin in aquatic ecosystems resulting from urban activities causes concern about their effects on the fauna. Substances absorbed by animals, such as those cited above, are metabolized by the liver, as it is the main target organ of several pollutants and also exercises basic vital functions in the organism. For this reason the liver is used as the main and most reliable biomarker in environmental studies. Thus the objective of the present study was to identify hepatic alterations resulting from exposure to water contaminated by a few commercial brands of biodegradable detergents and their effects when present together with several other contaminants found in nature. For such, a solution of 1 ppm of biodegradable detergents and water from an urban lake were tested on two widely distributed native Brazilian fish (Astyanax altiparanae and Prochilodus lineatus). Several alterations were found on the liver, including cytoplasm vacuolization, nuclear displacement, macrophage recruitment and reduced liver glycogen, showing a degenerative process in the liver of the fish, due to the action of contaminants.
文摘Fish populations are sensitive to environmental impact resulting from many factors, as an introduction of exotic species, industrial or residual waste, oil spills, pesticides or other agents that can directly affect the ecology and species survival. Astyanax altiparanae is pelagic and active swimmer specie and can have serious implications on its way of life as changes in muscle structure of fish may occur since the presence of pollutants in the water. In this study we analyze the alterations in Muscle and collagen fibers of the pectoral muscles and pollutants exposed flows contained in water with biodegradable detergents, and water coming from the Blue Lake, River clear-SP (2o24'39"S, 47o33'39"E) diluted. Effects of these exposures were analyzed during the period of seven and thirty days. Compared with acclimatized fish (Astyanax altiparanae) with pure water from an artesian well, the muscle fibers morphology and collagen concentration on them have changed due to the exposure to urban pollutants and biodegradable detergents.
基金The authors wish to thank Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP(2010/07513-5)for financially supporting this research.
文摘Objective: The purpose of this study was to investigate the presence of postural imbalances, which can interfere with the mandible position and affect the actions of the stomatognathic system. Materials and Methods: Forty men, aged between 23 to 29 years, were selected and divided into two groups: Group I comprised 20 healthy individuals with no clinical postural change diagnosis;Group II, 20 individuals who had ACL surgical, unilateral with patellar tendon graft, paired individual to individual (age and weight). All of them were submitted to an electromyography in different clinical conditions. In addition, a condylar biomechanical assessment was performed through videogrametry. Results: In electromyography and videogrametry, a normal standard biomechanical was observed for both groups, however, Group GII—Ligamentplasty presented an inhibition of the masticatory muscles and decreased joint kinesthetic. Conclusion: Based on the results obtained, it was concluded that after the reconstruction of the ACL, individuals presented changes in the stomatog-nathic system.
