University Estadual da Bahia

Itapetininga, Brazil

University Estadual da Bahia

Itapetininga, Brazil

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Pinheiro U.,Federal University of Pernambuco | Docio L.,University Estadual da Bahia | Nicacio G.,Federal University of Pernambuco | Hajdu E.,Federal University of Rio de Janeiro
Journal of Natural History | Year: 2013

This paper expands the known geographic distribution of Corvospongilla seckti Bonetto and Ezcurra de Drago, 1966 to another two Brazilian hydrographic basins, the East Atlantic and São Francisco basins. Simultaneously, it reassesses the status of C. seckti and Corvospongilla volkmeri De Rosa Barbosa, 1988. Re-examination of the holotype of C. volkmeri revealed no remarkable diagnostic features to differentiate it from C. seckti, given our present knowledge on the variability of the latter. Accordingly, C. volkmeri is considered a junior synonym of C. seckti. © 2013 © Taylor & Francis.


Azoubel P.M.,Federal University of Pernambuco | da Rocha Amorim M.,University Estadual da Bahia | Oliveira S.S.B.,University of Pernambuco | Maciel M.I.S.,University of Pernambuco | Rodrigues J.D.,São Paulo State University
Food Engineering Reviews | Year: 2015

The effect of ultrasound and osmotic dehydration pretreatments on papaya drying kinetics was investigated. The ultrasound pretreatment was carried out in an ultrasonic bath at 30 °C. The osmotic pretreatment in sucrose solution was carried out in an incubator at 34 °C and agitation of 80 rpm for 210 min. The drying process was conducted in a fixed bed dryer at 70 °C. Experimental data were fitted successfully using the Page model for dried fresh and pretreated fruits, with coefficient of determination greater than 0.9992 and average relative error lower that 14.4 %. The diffusional model was used to describe the moisture transfer, and the effective water diffusivity was identified in the order of 10−9 m2 s−1. It was found that drying rates of osmosed fruits were the lowest due to the presence of infused solutes, while the ultrasound pretreatment contributed to faster drying rates. Evaluation of the dried fruit was performed by means of total carotenoids retention. Ultrasound treatments in distilled water prior to air-drying gave rise to dried papayas with retention of carotenoids in the range 30.4–39.8 % and the ultrasonic-assisted osmotic dehydration of papayas showed carotenoids retention values up to 64.9 %, whereas the dried fruit without pretreatment showed carotenoids retention lower than 24 %. © 2015, Springer Science+Business Media New York.


PubMed | Federal University of Pernambuco and University Estadual da Bahia
Type: Journal Article | Journal: Brazilian journal of biology = Revista brasleira de biologia | Year: 2016

In northeastern Brazil, stabilization ponds are very suitable for wastewater treatment because of the relative great land availability and environmental conditions (e.g., high temperature) favorable for microorganism optimal development. However, blooms of potentially toxic cyanobacteria may affect the use of these treatment ponds due to resulting effluent poor quality. The objective of this study was to evaluate the dynamics of phytoplankton communities and the occurrence of cyanobacteria in a maturation pond located immediately after a series of two ponds. Temperature, dissolved oxygen, pH, BOD, N, and P were measured during a period of four months when samples were collected from the surface and the bottom of 7 sampling points distributed inside the pond. The phytoplankton of collected samples was also identified and classified using a conventional optical microscopy. Analysis of variance and Tukey test were used to evaluate the results. The three phytoplankton divisions found (Cyanophyta, Chlorophyta, and Euglenophyta) did not change considerably through surface and bottom. However, they changed greatly over the sampled months; great dominance of Cyanophyta was found at April and October, while Chlorophyta dominated the lagoon in September. Low superficial organic loads (between 78 and 109 kg BOD.ha-1.d-1) and N:P 10 were the determinant factors that favored the predominance of Cyanophyta. The presence of two potentially toxic species of Cyanophyta, Oscillatoria sp. and Microcystis aeruginosa, indicates that caution is required when considering the final destination of treated effluent and suggests a need to assess the risks and benefits associated with the use of the treatment technology.


PubMed | Federal University of Pernambuco and University Estadual da Bahia
Type: | Journal: Brazilian journal of biology = Revista brasleira de biologia | Year: 2016

In northeastern Brazil, stabilization ponds are very suitable for wastewater treatment because of the relative great land availability and environmental conditions (e.g., high temperature) favorable for microorganism optimal development. However, blooms of potentially toxic cyanobacteria may affect the use of these treatment ponds due to resulting effluent poor quality. The objective of this study was to evaluate the dynamics of phytoplankton communities and the occurrence of cyanobacteria in a maturation pond located immediately after a series of two ponds. Temperature, dissolved oxygen, pH, BOD, N, and P were measured during a period of four months when samples were collected from the surface and the bottom of 7 sampling points distributed inside the pond. The phytoplankton of collected samples was also identified and classified using a conventional optical microscopy. Analysis of variance and Tukey test were used to evaluate the results. The three phytoplankton divisions found (Cyanophyta, Chlorophyta, and Euglenophyta) did not change considerably through surface and bottom. However, they changed greatly over the sampled months; great dominance of Cyanophyta was found at April and October, while Chlorophyta dominated the lagoon in September. Low superficial organic loads (between 78 and 109 kg BOD.ha-1.d-1) and N:P 10 were the determinant factors that favored the predominance of Cyanophyta. The presence of two potentially toxic species of Cyanophyta, Oscillatoria sp. and Microcystis aeruginosa, indicates that caution is required when considering the final destination of treated effluent and suggests a need to assess the risks and benefits associated with the use of the treatment technology.


Ramos S.C.,National Institute for Space Research | Ramos S.C.,University Estadual da Bahia | Vasconcelos G.,Brazilian Technological Institute of Aeronautics | Antunes E.F.,National Institute for Space Research | And 5 more authors.
Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics | Year: 2010

In this work, the authors demonstrate the formation of stable superhydrophobic vertically aligned multiwalled carbon nanotube (VACNT) surfaces through CO2 laser irradiance, in which the contact angle value reached 161°. VACNT arrays were synthesized by microwave plasma chemical vapor deposition using N2/H2 / CH4 [10/90/14 SCCM (SCCM denotes cubic centimeter per minute at STP)]. CO2 laser technique was applied on VACNT surfaces with irradiance at different laser powers to promote the great stability of superhydrophobic surfaces. Contact angle measurement reveals that irradiated VACNT surface is superhydrophobic at all irradiances tested. Unlike as-grown VACNT, the samples treated with CO 2 laser show no sign of water seepage even after a prolonged period of time (∼24 h). This characteristic is very interesting and has various possible functional applications in micro- and nanomaterials and devices. © 2010 American Vacuum Society.


Kiill L.H.P.,Embrapa Semiarido | Coelho M.S.,Embrapa Semiarido | Siqueira K.M.M.,University Estadual da Bahia | Costa N.D.,University Estadual da Bahia
Revista Brasileira de Fruticultura | Year: 2011

For the cultivation of melons, the presence of bees in the flowering period is critical to ensure pollination and increase fruit production. In this sense, this paper aims to verify whether there are differences in behavior and in the floral visits by Apis mellifera foraged in three types of melon. The study was conducted at the Experimental Field of Embrapa Semiárido, Petrolina, PE, with yellow-type cultivars (Araguaia BRS), piel de sapo melon (P-33) and cantaloupe (CAN-4), with observations of floral biology, morphology and behavior of A. mellifera in the period from 5:00 a.m. to 8:00p.m. The visitation's peak was different, occurring from 11:00 to 12:00a.m., 10:00 to 11:00a.m. and 03:00 to 04:00p.m. for the yellow kind, cantaloupe and piel de sapo, respectively. As for the floral foraging, collecting nectar was constant throughout the day, while pollen occurred mainly in the morning. Regarding the type floral, hermaphrodite flowers were, in general, more visits in the cultivar type and piel de sapo, the inverse of the type registered for the cantaloupe. The greatest number of visits recorded in this floral type can be attributed to morphological differences, since its flowers are larger and therefore could be more attractive.


Craveirinha R.,University of Coimbra | Santos L.,University Estadual da Bahia | Roque L.,University of Coimbra
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

This paper describes an alternative approach for videogame procedural content generation focused on providing authors direct control on what gameplay ensues from the generated content. An architecture is proposed that allows designers to define, beforehand, target gameplay indicators, and then generates content for an existing base-design that achieves those same indicators in actual gameplay sessions with human players. Besides providing a description of this architecture, a trial intent on giving evidence of the approach's feasibility is presented. This experiment used an altered version of 'InfiniteMario Bros.' level generator, built to evolve design parameters so as to achieve 3 target gameplay indicators. Employing a Genetic Algorithm in generation of new parameter values, and using 25 players to test the end results, the platform was able to generate parameters that achieved, with precision, the values for those indicators. This result provides evidence of the approach's feasibility, hinting at its potential use for real-life design processes. © Springer International Publishing 2013.


De Lima L.M.,University of Rio Verde | Pozza E.A.,Federal University of Lavras | Da Silva Santos F.,University Estadual da Bahia
Journal of Phytopathology | Year: 2012

To study the chemical composition of coffee beans from coffee cherries infected by brown eye spot, two experiments were conducted with coffee cherries from Catuaí Amarelo and Acaiá Cerrado farms, in the full physiological maturity stage. The coffee cherries were harvested manually, and 20litres of cherries without visible symptoms of brown eye spot (healthy coffee cherries) and 20l of cherries with visible symptoms of the disease (diseased coffee cherries) were individually separated. After separation, the cherries were mixed in five different proportions to form the treatments: 0, 25, 50, 75 and 100% of diseased coffee cherries to 100, 75, 50, 25 and 0% of healthy coffee cherries. The experimental design was performed in randomized blocks, with each 8l of coffee cherries being considered an experimental unit. After drying (humidity 12%), the chemical characteristics were analysed. Polyphenols, potassium leachate and electrical conductivity had a linear increase with the rising of the proportion of diseased coffee cherries. Total sugars, soluble solids and pH decreased linearly with the rising of the proportion of diseased coffee cherries. © 2012 Blackwell Verlag GmbH.


Santos C.M.G.,São Paulo State University | Cerqueira R.C.,São Paulo State University | Fernandes L.M.S.,São Paulo State University | Dourado F.W.N.,University Estadual da Bahia | Ono E.O.,São Paulo State University
Revista Ciencia Agronomica | Year: 2010

The pitaya, a cactaceous species native to American tropical forests, produces well-appreciated and commercialized exotic fruits, mainly in the Asian continent. However, this plant species still requires technical information regarding cultivation in Brazilian agricultural areas, encouraging thus studies in several knowledge areas. This work aimed to evaluate the effect of different substrates on the rooting of cladodes immersed or not in the plant growth regulator naphthaleneacetic acid (ANA), as well as on root formation and initial development of Hylocereus undatus cuttings, which provides more vigorous and higher-quality seedlings. The experiment was carried out in a lath house of the Department of Plant Production - Horticulture Sector, College of Agronomical Sciences, Botucatu Campus, São Paulo State University (UNESP). Experimental design was completely randomized, in a 4x2 (substrates x conditions) factorial arrangement, with four replicates. At 60 days after the experiment establishment, shoot fresh and dry matter, root fresh and dry matter, and the highest root length were evaluated. The initial root growth and development of seedlings were not influenced by ANA. Substrates containing sand were the most suitable to produce vigorous and high-quality seedlings. Sand+manure bovine mixture provided higher phytomass accumulation in the root system of pitaya (H. undatus).


Silva G.J.N.,University Estadual da Bahia | Souza E.M.,University Estadual da Bahia | Rodrigues J.D.,São Paulo State University | Ono E.O.,São Paulo State University | Mouco M.A.C.,Embrapa Semi Arido
Acta Horticulturae | Year: 2013

Irregular production is a major problem in mango. In an attempt to overcome irregular bearing, effects of two antigibberellins on flowering were evaluated, uniconazole (0.25 g of active ingredient per meter of canopy tree diameter) and paclobutrazol (1.0 g of active ingredient per meter of canopy tree diameter). Treatments were applied as a soil drench using 2 L of solution per tree, in a commercial orchard of 'Tommy Atkins' mango. Treatments were applied after the second vegetative flush commenced, subsequent to pruning. Branch growth was evaluated every 30 days after treatment application up to a maximum period of 90 days. The flowering percentage was recorded at 130 days. Ammonium nitrate (NH4NO3) as a foliar spray (concentration of 0.75%) was applied five times at seven day intervals from 95 to 100 days after treatment application as a dormancy breaking treatment. It was found that both paclobutrazol (PBZ) and uniconazole (UCZ) significantly inhibited the development of vegetative growth compared to the control. Both treatments resulted in identical rates of flowering shoots, 87%; based on results, it can be concluded that the application of antigibberellins (PBZ and UCZ) inhibit vegetative development in mango 'Tommy Atkins', and promote high levels of flowering. Additional tests are being carried out in other farms to confirm these findings, for different cultivars and seasons. © ISHS 2013.

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