Universidade Estadual de Londrina

About: Universidade Estadual de Londrina is a education organization based out in Londrina, Brazil. It is known for research contribution in the topics: Population & Toxoplasma gondii. The organization has 13052 authors who have published 19291 publications receiving 212123 citations.

Metais pesados em águas superficiais como estratégia de caracterização de bacias hidrográficas

Abstract: The input of heavy metals concentrations determinated by ICP-AES, in samples of the Cambe river basin, was evaluated by using the Principal Component Analysis. The results distinguishes clearly one site, which is strongly influenced by almost all elements studied. Special attention was given to Pb, because of the presence of one battery industry in this area. Some downstream samples were associated with the same characteristics of this site, showing residual action of contaminants along the basin. Other sites presented influence of soil elements, plus Cr near a tannery industry. This study allowed to distinguish different sites in the upper basin of the Cambe (Londrina-PR-BR), in accordance to elements input.

Pulmonary function and aerobic capacity in asymptomatic bariatric candidates with very severe morbid obesity

Abstract: OBJETIVOS: A capacidade aerobica e a funcao respiratoria podem estar comprometidas na obesidade morbida, todavia poucos estudos sao disponiveis em candidatos a cirurgia bariatrica com massa corporal muito elevada.Num protocolo prospectivo, estas variaveis foram documentadas no pre-operatorio, visando despistar possiveis limitacoes fisiologicas numa populacao nominalmente sadia e sem queixas. METODO: Foram analisados 46 casos consecutivos (idade 39.6 ± 8.4 anos, 87.0% mulheres, indice de massa corporal /IMC 49.6 ± 6.3 kg/m2 )). As variaveis ventilatorias foram investigadas por espirometria automatizada e a capacidade aerobica mediante um teste de Bruce modificado em esteira ergometrica, sendo que a composicao corporea foi fornecida pela bioimpedância. RESULTADOS: A gordural total estava fortemente aumentada (46.4 ± 4.6% do peso) e a agua corporal diminuida (47.3 ± 4.6 % do peso) nesta serie, tal como esperado para o grau de obesidade descrito. Os achados espirometricos medios incluindo-se capacidade vital forcada de 3.3 ± 0.8 L e volume expiratorio forcado de 1 segundo de 2.6 ± 0.6 L nao fugiram do aceitavel para idade e sexo. Entretanto em 20,9% insuficiencia respiratoria restritiva leve foi diagnosticada. A capacidade aerobica estava mais nitidamente prejudicada, seja pelo baixo tempo e distância maxima atingidos (respectivamente 4.5 ± 1.1 min e 322 ±142 m), seja pelo custo proporcionalmente alto do esforco, refletido pelo consumo maximo de oxigenio (23.4 ± 9.5 ml/kg/min); CONCLUSOES: 1) A avaliacao cardio-respiratoria foi factivel e bem tolerada; 2) As variaveis espirometricas meias nao estavam alteradas, porem parte da populacao exibiu transformacoes restritivas leves; 3) A obesidade interferiu negativamente sobre a tolerância ao exercicio, reduzindo o desempenho e aumentando o custo metabolico da corrida em esteira ergometrica; 4) Recomenda-se maior atencao a capacidade aerobica de candidatos bariatricos seriamente obesos;

Preslaughter handling with water shower spray inhibits PSE (pale, soft, exudative) broiler breast meat in a commercial plant. Biochemical and ultrastructural observations

Abstract: The objective of this work was to investigate the influence of water spray treatment before broiler slaughtering on the quality of breast meat (Pectoralis major) and to observe ultrastructural changes promoted by the biochemical/physiological events during rigor mortis onset. Commercial Ross chickens were divided into two groups: Untreated Group (UG) (n = 608) and Treated Group (TG) (n = 611), without and with water shower treatment, respectively. Drip and cook losses, pH and color measured after 24 h postmortem demonstrated that antemortem water shower treatment inhibited PSE development in chicken breast meat. Histological studies of the PSE samples from UG birds after 72 h postmortem revealed under light microscopy a shrinking of muscle cell diameter by approximately 10% in relation to TG samples and an extracellular enlargement of endomysium and perimysium sheaths. By electron microscopy of PSE meat, Z-lines appeared fragmented, A-bands including the M-line disappeared and a super-contraction of sarcomeres was observed, indicating that proteins were adversely affected by heat stress.