Instituto Federal Of Ensino

Rio Verde de Mato Grosso, Brazil

Instituto Federal Of Ensino

Rio Verde de Mato Grosso, Brazil
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Holtz A.M.,Instituto Federal Of Ensino | de Almeida G.D.,Federal University of Viçosa | Fadini M.A.M.,Centro Tecnologico Zona da Mata | Zanuncio J.C.,Federal University of Viçosa | And 2 more authors.
Acta Scientiarum - Agronomy | Year: 2011

The effect of plant feeding on biological aspects of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) was evaluated. Nymphs and adults of this predator were fedwith Tenebrio molitor L. (Coleoptera: Tenebrionidae) pupae on Eucalyptus urophylla plants inthe field or only with pupae of this prey in the laboratory. The development and nymphal survival, as well as the pre-oviposition period, number of egg masses, number, fertility and viability of eggs and the longevity of females of this predator were evaluated. The eucalyptus plants improved the development of P. nigrispinus. This demonstrates that this predator can present higher population growth with eucalyptus plants and T. molitor pupae than in the laboratory (controlled conditions) only with this prey. These plants can supply nutrients that can the population growth and efficiency of P. nigrispinus for biological control in eucalyptus plantations.

Holtz A.M.,Instituto Federal Of Ensino | Pallini A.,Federal University of Viçosa | Venzon M.,Centro Tecnologico da Zona da Mata | Zanuncio J.C.,Federal University of Viçosa | And 3 more authors.
Phytoparasitica | Year: 2010

The predator Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) has been used as a natural enemy to control herbivorous insects in eucalyptus plantations. However, because of the short co-evolutionary history of the predator with this imported plant species, the defensive compounds of eucalyptus may have a negative effect on the predator. Therefore, the survival and development of P. nigrispinus were studied on eucalyptus (Eucalyptus urophylla; exotic host plant) and guava (Psidium guajava; native host plant). P. nigrispinus performance was indeed superior on guava plants than on eucalyptus. The number of fertile eggs and nymphal survival were 52.6% and 12.0% on guava compared with 20.0% and 1.3% on eucalyptus, respectively. Longevity of P. nigrispinus was 115 days on guava and 98 days on eucalyptus. This shows that the predator is not yet fully adapted to the exotic host plant. One possible reason is that the plant toxic compounds in eucalyptus act on this predator by antibiosis. © 2010 Springer Science + Business Media BV.

De Oliveira D.E.C.,Instituto Federal Of Ensino | Resende O.,Instituto Federal Of Ensino | Campos R.C.,Instituto Federal Of Ensino | De Sousa K.A.,Instituto Federal Of Ensino
Revista Caatinga | Year: 2014

The fruits and seeds of tucumã-of-Goiás have important nutritional properties and are used in human consumption and feed. Thus, the study of the thermodynamic properties in the drying process is critical to project analysis equipment, preservation and packaging process of seeds. The aim of this study was to determine and evaluate the thermodynamic properties for different hygroscopic moisture contents of seeds tucumã-of-Goiás. For the experimental data we used the static indirect at temperatures of 10, 20, 30 and 40 °C and moisture content of 12.8; 8.9; 5.8 and 3.6% dry base (d.b). The model Copace was that got the best fit to hygroscopic equilibrium moisture content. The thermodynamic properties are affected by moisture content, and the latent heat of vaporization of water from the seeds increases with the decrease in the equilibrium moisture content ranging from 3049.00 to 2666.73 kJ kg-1 for moisture content of 3.6 to 12.8% d.b., respectively. The enthalpy and differential entropy are strongly related to the moisture content of seeds. The isokinetic temperature of 210.93 K confirms the chemical linear compensation between differential entropy and enthalpy seeds of tucumã-of-Goiás, the desorption process being controlled by the enthalpy of seeds. © 2014, Universidade Federal Rural do Semi-Arid. All rights reserved.

Barros D.F.,Federal University of Pará | Torres M.F.,Instituto Federal Of Ensino | Fredou F.L.,Federal Rural University of Pernambuco
Biota Neotropica | Year: 2011

Fish diversity in the Amazon Basin is recognized as one of the highest in the world. However, information on the estuarine ichthyofauna of the region is still fragmented and based on localized inventories. This study reports on an inventory carried out in the estuaries of São Caetano de Odivelas and Vigia, State of Pará, a poorly known area within the Amazon Estuary. Two research cruises of four days long each were undertaken in 2003, one in June (austral winter) and other in December (summer), with use of gill nets, traps, cast net and hook-and-line. It was collected 1,689 individuals, including 58 species from 23 families, all of them previously recorded in the Amazon Estuary. Perciformes, Siluriformes and Clupeiformes were the most diverse taxa, comprising 73.8% of the species. From the 58 recorded species, 24% are pelagic, 50% are demersal and the remaining have pelagic-demersal habits. Coastal-marine species predominated in the region.

Galdino A.G.S.,Instituto Federal Of Ensino | Oliveira E.M.,São Paulo State University | Filippin-Monteiro F.B.,São Paulo State University | Zavaglia C.A.C.,University of Campinas
Ceramica | Year: 2014

Once there is an increase on technology applied to human health, life expectancy has increased, but not all body parts can maintain their functions with aging process. Tissue engineering has developed for replacing, repairing or reconstructing lost or damaged tissues or organs by accidents or serious diseases through using and developing of new materials, which are biocompatible, bioabsorbable, porous, etc. This research aimed on evaluating in vitro essays of porous hydroxyapatite - titanium oxide (HA-TiO2) composite, with 50wt.% HA - 40wt.% TiO2 for using as scaffolds on bone tissue engineering. Samples have been made by the polymeric sponge method, using sodium bicarbonate as binder and flocculant. Sintering has been done at 1250 °C; 1300 °C and 1350 °C. Fibroblasts and osteoblasts immortalized lineages have been used to evaluate the composite cytotoxicity, cell adhesion and growth. Three samples were used for those essays at an interval of five days. Results have shown satisfactory, with fibroblasts and osteoblasts adhesion and growth, which serves as an indicator for the composite can be submitted to in vivo essays.

Holtz A.M.,Instituto Federal Of Ensino | Dalvi L.P.,Federal University of Espirito Santo | Celestino F.N.,Instituto Federal Of Educacao | Pratissoli D.,Federal University of Espirito Santo | And 2 more authors.
Revista Brasileirade Ciencias Agrarias | Year: 2016

This study evaluated the reproductive parameters and longevity of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) under different proportions of females to optimize the obtaining of individuals in the rearing to release of this predator in the field. The experiment was conducted in a completely randomized design and tested the following proportions: 1 female to 1 male (1:1), 2 females to 1 male (2:1), 3 females to 1 male (3:1) and 4 females 1 for male (4:1). The reproductive parameters and longevity were evaluated. The number of eggs per egg mass was higher in the proportion 1:1 (23.0 eggs per egg mass), differing from the other proportions studied. The number of eggs per female decreased significantly due to the increase in the proportion of females. In the proportion 1:1 the average of eggs per female was 790.0 and fell to 372.6 in the proportion 4:1. Egg viability was highest in the proportion 1:1 (74.32%), with a significant reduction in the other proportions. The longevity of females decreased significantly with increasing proportion. The increase in proportion of female negatively interferes in the reproductive parameters and longevity of P. nigrispinus, should be considered both in mass rearing techniques how much in the release of this predator in the field.

Pinto L.R.M.,University Estadual Of Santa Cruz | Sanches C.L.G.,Instituto Federal Of Ensino | Dias C.T.S.,University of Sao Paulo | Loguercio L.L.,University Estadual Of Santa Cruz
International Journal of Plant Sciences | Year: 2013

Repeated measures are widely used in a variety of aspects related to plant research, such as the assessment of genotypes subjected to stressing agents. Analysis of variance is routinely employed in split-plot experimental designs with repeated measurements on the subplots. However, this is not the best approach, as measurements cannot be randomly taken and so the H-F condition is rarely met. In this study, procedures of multivariate analysis of profiles (MAP) are presented as statistically advantageous options for solving similar analytical problems. We used data from trials with 10 clonal genotypes of cacao (Theobroma cacao) in which their seedlings' resistance against ceratocystis wilt was assessed on 11 repeated measures that did not comply with the H-F condition. Multivariate analyses based on the disease-response profiles of all clones allowed us to understand the genotype-specific patterns of disease growth, identify when profiles reached the plateau, verify the levels of damage at this point, and assess coincidence and parallelism of the genotypic profiles. On the basis of various pertinent contrasts, MAP also provided robust criteria for genotypic classification into groups with different resistance phenotypes based on disease levels at plateau points and similarity levels of responses within and between groups. The possibility of addressing other biological questions through similar methods and contrasts is discussed. © 2012 by The University of Chicago.

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