Cytotoxicity of metals is important because some are potential mutagens able to induce tumors in humans and experimental animals. Chromium can damage DNA several ways, including double strand breaks (DSBs) which generate chromosomal aberrations, micronucleus formation, sister chromatid exchange, formation adducts alterations replication transcription. In our study, water samples from three sites the Córrego dos Bagres stream Franca municipality Brazilian state São Paulo were subjected comet...

Considering that the soil aggregation reflects interaction of chemical, physical and biological factors, aim this study was evaluate alterations in aggregation, an Oxisol under no-tillage (NT) conventional tillage (CT), since over 20 years, using as reference a native forest natural state. After analysis profile (cultural profile) areas management, samples were collected from layers 0-5, 5-10, 10-20 20-40 cm, with six repetitions. These analyzed for aggregate stability index (ASI), mean...

As modificações estruturais causadas no solo pelos diferentes sistemas de manejo podem resultar em maior ou menor compactação, que poderá interferir na densidade do solo, porosidade, infiltração água e desenvolvimento radicular das culturas. Assim, este trabalho teve como objetivo estudar, condições campo, os efeitos da estrutura, umidade resistência à penetração sistema milho (Zea mays), sob convencional (aração mais grade niveladora há dez anos) plantio direto (há vinte anos). avaliações...

Das opções de disposição final do lodo esgoto, a reciclagem agrícola tem sido uma das mais utilizadas em diversos países desenvolvidos, sendo considerada forma adequada termos técnicos, econômicos e ambientais. Este trabalho teve por objetivo avaliar o efeito residual esgoto na produtividade milho safrinha, após dois anos aplicação consecutiva desse resíduo um Latossolo Vermelho eutroférrico. O experimento foi realizado campo, delineamento blocos ao acaso com três repetições, os tratamentos...

ABSTRACT Background An accurate local activation time (LAT) map is essential during premature ventricular contraction (PVC) ablation. The aim of this study was to evaluate whether the use a novel octaspline multielectrode catheter, with and without catheter‐embedded unipolar reference, improves LAT mapping PVC ablation compared pre‐existing pentaspline catheter. Methods This prospectively assessed 10 consecutive patients referred for from January June 2023. Three 12‐min maps were performed...

Drought is an environmental condition that compromises the development of coffee plants. New genotypes are resistant to drought must be selected quickly and practically. The objectives this study were evaluate resistance five Coffea arabica, including three new with introgression genes from racemosa (H0113-40-26-1, H0113-40-26-19, H0113-40-26-10), water restriction relate intensity plant wilting physiological responses nutrient accumulation. experiment was conducted using 45 seedlings...

O objetivo foi caracterizar as exigências climáticas dos estádios fenológicos de cultivares C. arabica e indicá-las para a tecnologia escalonamento da colheita. As avaliações foram realizadas na fazenda experimental do Instituto Agronômico Paraná (IAPAR), em Londrina, 16 genótipos, segundo uma escala fenológica, durante dois anos. número médio dias, soma térmica graus-dia, precipitação pluvial acumulada temperatura média florada até o estádio maturação completa (cereja) foram,...

The caterpillar Pseudoplusia includens (Walker, 1857) (Lepidoptera, Noctuidae), known as soybean looper, is a pest that has recently assumed greater importance in Brazil. Isolates of nucleopolyhedroviruses (NPVs) this have been identified from cotton Guatemala and farms Brazil, providing an interesting perspective potential use viral insecticide against the insect lieu to chemical insecticides. With objective contribute characterization studies virus, morphological molecular analyses...

All the Coffea arabica L. cultivars developed by IAPAR4 were resistant to rust ( Hemileia vastatrix ) when registered. However, with appearance of new races these now present different resistance levels. The aim this work was assess in coffee IAPAR. Resistance local leaf assessed high disease intensity field conditions August 2007. Twelve cultivars, from IPR 97 108, evaluated. ‘IAPAR 59’ and ‘Catuai Vermelho IAC 81’ used as susceptibility standards, respectively. experimental design...

Neste trabalho se objetivou avaliar a aplicação foliar de aminoácidos associada à nitrogênio em cobertura, no desempenho produtivo e nas características agronômicas da cultura do milho, cultivado período safrinha. O delineamento foi o blocos ao acaso, esquema fatorial 4 x 4, com repetições. Foram utilizadas quatro doses cobertura (0, 60, 120 180 kg ha-1) na forma ureia aminoácido 8, 16, 24 L aplicadas via foliar. A cultivar milho utilizado Pioneer 305 31H. As variáveis analisadas foram teor...

The objective of the study was to evaluate resistance rust in coffee cultivars developed by research institutes Brazil Paraná state. Resistance local leaf races assessed high disease intensity field conditions at Londrina and Congonhinhas 2009 2010.The were EPAMIG/UFV, IAPAR, IAC MAPA/Procafé. resistant standard 'IAPAR 59' susceptible standards Catuaí Vermelho 144' 'Bourbon Amarelo' used. A randomized block design with three replications plots 10 plants scale from 1 5 based on used...

Choosing the right sowing dates can maximize outcomes of interaction between genotype and environment, thus increasing grain yield baking quality wheat (Triticum aestivum L.).The present study aimed at determining most appropriate that cultivars.Seven cultivars (BRS 179, BRS Guamirim, Guabiju, Umbu, Safira, CD 105 115) were evaluated four (the 1 st 15 th June July) in two harvesting seasons (2007 2008).The was setup a completely randomized block design with repetitions.The effects year date...

ABSTRACTThe incidence and the levels of yield loss caused by white mold soybean (caused fungus Sclerotinia sclerotiorum) have increased in areas higher altitude at Cerrado Southern Brazil, causing losses up to 60%. The aim this study was select saprobic fungi with potential control soybean. First, vitroantagonism screening carried out test eight against S. sclerotiorum. Assessment sclerotiorum mycelial growth done four seven days after its placement on culture medium. isolate showing...

The aim of this research was to characterize the phenological behavior, as well determine thermal demand ‘Isabel’ (Vitis labrusca) and ‘Rubea’ (V. labrusca x V. vinifera) grapevines for grape juices in North Paraná. trial carried out a experimental vineyard located at Technology Center Corol Cooperative, Rolândia, PR. established July, 2002 grafted 2003. design used statistical model with four replications factorial 2x3 project (2 3 rootstocks). plants were cultivated GDC (Geneva Double...

The aim of this research was to characterize the ripening evolution, physico-chemical and productive characteristcs 'Isabel' (Vitis labrusca) grafted on 'IAC 766 Campinas', 572 Jales' '420-A' rootstocks for grape juice in North Paraná. trial carried out a experimental vineyard located at Technology Center Corol Cooperative, Rolândia, PR. established July, 2002 2003. randon design used as statistical model with four repetitions. trees were cultivated GDC (Geneva Double Curtain) system, 2.0 x...

A seca é um dos fatores limitantes ao desenvolvimento cafeeiros arábicos e fontes de tolerância existem nas diferentes espécies Coffea spp. O objetivo neste trabalho foi avaliar a à em mudas 21 genótipos café, portadores genes espécies, por meio da avaliação do grau murchamento suas folhas quando submetidas períodos restrição hídrica. delineamento experimental inteiramente acaso, com 24 repetições uma muda seis meses idade parcela. experimento conduzido casa vegetação no Instituto Agronômico...

ABSTRACT The aim of this study was to evaluate the reaction Arabica coffee progenies derived from Icatu Meloidogyne paranaensis. experiment conducted under screenhouse conditions at Instituto Agronômico do Paraná (IAPAR) in Londrina, State, Brazil. Seedlings with three four pairs leaves were inoculated 5,000 M. paranaensis eggs and second-stage juveniles (J2). Four F4 HN 87609 H4782-7-925 evaluated. C. arabica cv. Catuaí Vermelho IAC 81 IPR 100 susceptible resistant checks, respectively. a...

O monitoramento do teor de nitrato nos alimentos é importante, uma vez que poderão ser formados compostos prejudiciais à saúde humana e animal após sua ingestão. Com o objetivo avaliar presente em alface, foram coletadas analisadas as folhas alface crespa comercializada no Município Londrina, cultivada sistemas hidropônico convencional. Os valores encontrados variaram entre 26 2.568 mg.kg-1 peso fresco, sendo plantas cultivadas sistema apresentaram teores superiores relação às convencional,...

O objetivo desta investigação foi estudar progênies de Coffea arabica quanto a resistência à ferrugem alaranjada, causada por Hemileia vastatrix, e mancha aureolada, Pseudomonas syringae pv. garcae. experimento instalado no Centro Produção Experimentação Londrina, do Instituto Agronômico Paraná. Utilizou-se delineamento em blocos ao acaso, com três repetições, 13 tratamentos (11 as testemunhas 'IAPAR 59' 'Catuaí Vermelho IAC 81'). Os resultados sugerem investigar possibilidade da ocorrência...

This study aimed to measure the effects of rates plant growth regulator trinexapac-ethyl on development aerial, root parts and yield components corn. The experiments were conducted in a greenhouse: one assay was at evaluating plant, 4 x factorial arrangement, with four (0, 125, 250 375 g i.a. ha-1) assessment periods (14, 21, 28 35 days after application), other assessing productions for corn response same regulator. present demonstrates that grain per reduced use trinexapac-ethyl, due...