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 & Context (language use). The organization has 13052 authors who have published 19291 publications receiving 212123 citations.

Biology and consumption of Spodoptera eridania (Cramer) (Lepidoptera: Noctuidae) in different hosts

Abstract: Spodoptera eridania (Cramer) e uma praga em expansao nas culturas de algodao e de soja no cerrado, necessitando de estudos de biologia em diferentes hospedeiros. Com o objetivo de conhecer a biologia e o consumo foliar de S. eridania em algodoeiro, soja e corda-de-viola (Ipomoea grandifolia), este inseto foi criado em laboratorio (27± 2oC, UR 60± 10%, fotofase de 14h), a partir de lagartas recem-eclodidas e individualizadas. Foram observados parâmetros relacionados a biologia, ao consumo foliar e a reproducao quando alimentadas nos tres hospedeiros. O periodo de desenvolvimento larval foi menor nos insetos alimentados com algodoeiro e corda-de-viola do que em soja, embora a sobrevivencia em soja tenha sido satisfatoria (80%). Lagartas alimentadas com folhas de algodoeiro e corda-de-viola tiveram peso medio de pupas semelhante, porem 1,3 e 1,4 vezes maior do que o obtido por pupa macho e femea, respectivamente, em folhas de soja. A soja, tambem influenciou negativamente a sobrevivencia de pre-pupa e pupa, contrastando com os valores, acima de 91,8%, nos outros dois hospedeiros. Em geral, a folha de soja foi a menos adequada para S. eridania, causando 6,3% de deformidade em pupas. Variaveis como periodos de pre-oviposicao, oviposicao, numero de posturas/femea e o total de ovos/femea, nao foram afetados pelas dietas. Embora as folhas de algodoeiro tenham sido as menos consumidas, elas proporcionaram um bom desenvolvimento do inseto. Comprovou-se que a planta invasora corda-de-viola e um hospedeiro alternativo adequado para a especie, possibilitando o seu desenvolvimento e a sua reproducao na ausencia de hospedeiros cultivados.

Hemodynamic response to resistance exercise with and without blood flow restriction in healthy subjects.

Abstract: Summary Correspondence Marcos Polito, Universidade Estadual de Londrina– Rod, Celso Garcia Cid, km 380, Londrina, PR86050-520, BrazilE-mail: marcospolito@uel.br Accepted for publication Received 28 April 2014;accepted 31 October 2014 Key words blood pressure; cardiovascular physiology; resistancetraining; strength; vascular occlusion Purpose: To compare the hemodynamic response during resistance exercise at highintensity (HI), low intensity (LI) and low intensity with blood flow restriction(LI-BFR) in healthy subjects.Methods: Twelve men performed three sets of unilateral knee extension exercises atLI-BFR and LI (15 repetitions; 20% of 1RM) and HI (8 repetitions; 80% of 1RM).The blood flow restriction was accomplished using a sphygmomanometer posi-tioned on the thigh and inflated to the point of blood flow interruption(167 9 16 6 mmHg). The hemodynamic variables were obtained by continu-ous beat-to-beat photoplethysmography. Rating of perceived exertion (RPE) andblood lactate were also measured.Results: The HI session showed higher values (P<0 05) in all sets than the LI andLI-BFR for diastolic blood pressure, heart rate and rate-pressure product. TheLI-BFR showed higher values than the LI only in the 3rd set for systolic bloodpressure, heart rate and rate-pressure product. Blood lactate was higher in the HI(4 2 0 2 mmol) and LI-BFR (4 1 0 3 mmol) than the LI(3 5 0 3 mmol). Rating of perceived exertion was higher in the LI-BFR(7 9 0 3) than the HI (6 4 0 4) and LI (3 2 0 4).Conclusion: The LI-BFR session exhibited similar blood lactate to the HI, a higherrating of perceived response than the HI and LI, and equal or lower hemodynamicresponses than the HI.

Isolation and characterization of Streptococcus spp. group B in Nile tilapias (Oreochromis niloticus) reared in hapas nets and earth nurseries in the northern region of Parana State, Brazil

Abstract: The objective of this study was to isolate and characterize Streptococcus spp. in Nile tilapias (Oreochromis niloticus) reared in net-pens and earth nurseries. Eight intensive tilapia-rearing farms were investigated in north Parana, Brazil from April 1st 2001 to April 30th 2002. The fish were reared in a system of hapas nets on four farms and in earth nurseries on other four farms. A total of 370 samples were analyzed of material collected from 120 fish (brain, liver, kidney, skin scrapes, ascites liquid and eye) that were sown on BHI agar (Brain Heart Infusion) supplemented with 1% yeast extract and sheep blood. Streptococcus spp. was isolated in 36 of the samples (18 brain, eight liver, eight kidney and two ascites liquid) from 25 fish. Streptococci were isolated in both systems, almost in the same proportion. First the streptococci were characterized by the catalase and esculin test, growth in methylene blue and sodium chloride at 6.5%. They were classified in groups by the Slidex Strepto-Kit (BioMerieux, France). The phenotypic characteristics were determined by the Api 20 Strep microtest system (BioMerieux, France). The 36 Streptococcus spp. samples did not present hemolysis and were classified as Lancefield group B. Further 16 samples were identified as Streptococcus agalactiae and 20 were not identified by the Api 20 Strep, but presented the same biochemical profile described for the reference strain of Streptococcus difficile (ND-2-22).