ABSTRACT
In this work the thermal diffusivity (D) of Astyanax lacustris fish scale is investigated aiming to use it for environmental integrity certification. The D values were obtained by a relatively simple procedure by a photoacoustic method. The chosen fish species is from wide occurrence in Brasil's basins. It has short migration, and it has also been used as environmental bioindicator. The results obtained in 195 scales sampled from three different streams in the Midwest region in Brazil gives an average value of D ~ 4 × 10-3 cm2/s. ANCOVA analysis demonstrated that D values are able to differentiate among the three basins and indicates that it is dependent on the scales thickness and water conductivity. This last one is strongly affected by biotic and abiotic actions, so that D values measured by photoacoustic method can be used for interpreting the environmental integrity from where the fishes were sampled.
Subject(s)
Environmental Monitoring , Fishes , Animals , Brazil , Ecosystem , Environmental Monitoring/methods , Spectrum AnalysisABSTRACT
Foram estudados 2.980 casos de alcoolismo no PSM de Juiz de Fora (MG); todos os casos apresentando sinais de ingesta recente de bebida alcoolica, motivo pelo qual procuraram assistencia medica. A hipertensao arterial (HA) foi encontrada em 68 individuos (2,28%), perfazendo 56 homens e 12 mulheres; 19 brancos, 40 pretos e 9 mulatos. A maioria da populacao estudada era jovem (15-35 anos), o mais jovem hipertenso com 15 anos e o mais velho com 65 anos. A HA foi mais frequente nos individuos pretos entre 26 e 45 anos (p< 0,05). 41,17% apresentaram-se hipertensos com alcoolismo tipo agudo e 58,83% hipertensos com alcoolismo tipo cronico. Conclui-se que a HA na populacao alcoolatra estudada coincide com a maior frequencia da HA essencial que incide sobre a raca masculina jovem
