Centro Universitario Da Fundacao Educacional Of Barretos

Barretos, Brazil

Centro Universitario Da Fundacao Educacional Of Barretos

Barretos, Brazil
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Malaspina I.C.,São Paulo State University | Cruz C.,Centro Universitario Da Fundacao Educacional Of Barretos | Garlich N.,São Paulo State University | Bianco S.,São Paulo State University | Pitelli R.A.,São Paulo State University
Planta Daninha | Year: 2017

The goal of this study was to evaluate the effectiveness of diquat, both isolated and associated with copper sources (oxychloride and hydroxide) in controling the H. Verticillata submerged macrophyte and the A. Gracilis microalgae. For this purpose, 10.0 cm H. Verticillata young branches and 300 mL of A. Gracilis culture were used. The experiments were performed in laboratory and the tested diquat concentrations were: 0.1; 0.2; 0.4; 0.8; 1.2; and 1.8 mg L-1, either isolated or added with 1.0% copper oxychlorideand hydroxide, as well as a control sample. On day 3, 7, 11, 21 and 30 after application, phytotoxicity signs were evaluated and on day 60 after application, green and dry biomass production and plant length were measured. To obtain dry mass, plants remained in a greenhouse with forced air circulation at 65.0oC, until constant weight. On day 1, 7, 15, 21, 30, 45 and 60 after application, the concentration of chlorophyll a in the water was assessed. The herbicide diquat used alone or in combination with sources copper oxychloride and hydroxide was effective in the control of H. Verticillata and microalgae A. gracilis. © 2017, Sociedade Brasileira da Ciencia das Plantas Daninha. All rights reserved.

Maragno H.,Federal University of São Carlos | Rodella P.,Centro Universitario Da Fundacao Educacional Of Barretos | Rodella P.,São Paulo State University | Da Silva Freitas J.,University of Sao Paulo | Takase L.F.,Federal University of São Carlos
Brain Research | Year: 2015

Phosphatidylserine (PS) is an acidic phospholipid that is widely used as an alternative and/or complementary treatment of cognitive impairments. We hypothesize that these changes may be attributable, at least in part, to alterations in hippocampal neurogenesis. The aim of the present study was to investigate the effects of acute and chronic PS administration on hippocampal cell proliferation and survival in adult (5 months old) and middle-aged (12 months old) male Wistar rats. PS was injected daily (50 mg/kg, i.p.) during 7 days (acute experiment) or 21 days (chronic experiment). To label newly generated cells, rats received a single BrdU injection (200 mg/kg, i.p.) one day before PS treatment. The object recognition test was performed, and the rats were perfused. The brains were removed and processed with immunohistochemistry techniques for Ki-67 (cell proliferation) and BrdU (cell survival). The acute and chronic regimens were unable to promote cognitive improvement in either age group in the object recognition test. The analysis of cell proliferation showed a significant increase in the number of Ki-67-positive cells after acute and chronic PS administration in both age groups. The analysis of cell survival showed that acute and chronic PS administration increased the number of BrdU-positive cells only in adult animals. Copyright © 2015 Elsevier B.V.

PubMed | Centro Universitario Da Fundacao Educacional Of Barretos, São Paulo State University and Agencia Paulista de Tecnologia dos agronegocios
Type: Journal Article | Journal: Tropical animal health and production | Year: 2016

The objective of this study was to evaluate the effect of increasing the supply of protein with different degradation rates on the performance and metabolism of growing Nellore cattle reared on Brachiaria brizantha cv. Marandu pasture during the transition period from the dry to rainy season. The experiment was installed on an area of 34 ha, divided into 12 paddocks with an average area of 2.85 ha. In the performance evaluation were utilized 72 recently weaned, non-castrated Nellore cattle with an initial body weight (BW) of 199 kg (SEM=16). The following supplements were used: energy protein supplement containing 25% crude protein (CP) (C-25) and energy protein supplements containing 40% CP with one third highly degradable CP and two thirds poorly degradable CP (40-1/3NPN), one half highly degradable CP and one half poorly degradable CP (40-1/2NPN), and two thirds highly degradable CP and one third poorly degradable CP (40-2/3NPN). Higher protein degradation rates reduced supplement intake (P<0.01). In the first period, animals consuming supplement 40-1/3NPN exhibited higher average daily gain (ADG) (0.30 kg/day), similar to that of animals receiving supplement 40-1/2NPN (P=0.04). In the second period, supplement 40-2/3NPN resulted in lower ADG (0.19 kg/day less than the other supplements). There was no effect of supplement on animal performance in the third period (P>0.10), when ADG was 0.56 kg/day. In conclusion, the response to supplementation is associated with interactions with characteristics of the forage canopy. Supplementation with a true protein source will be beneficial only during the early stage of the dry-rainy season transition period.

Malerbo-Souza D.T.,Centro Universitario Da Fundacao Educacional Of Barretos | Halak A.L.,State University of Maringá
Zootecnia Tropical | Year: 2013

The objectives of this work were to study the floral biology, biodiversity and behavior of pollinators in flowering orange (Citrus sinensis L. Osbeck), variety "Pera-Rio", in six different places, in six years, and its effect on fruit production. The frequency of insects was obtained by counting the first 10 minutes at a time, from 7h00 to 18h00, with three replications. For fruit set, 300 fl ower buds were marked, 150 discovered and 150 of them kept covered, preventing the visit of the insects. Fruits were evaluated for count, number of buds and seeds, weighed (g), height (cm), width (cm), flesh thickness (mm), volume (ml) and pH juice. The insects more frequent observed were honeybees Apis mellifera, others Hymenoptera, Lepidoptera, Vespidea and Coleoptera (beetles). Africanized bees preferred to collect nectar compared to pollen. Trigona spinipes bees preferred to collect pollen compared to nectar and Lepidoptera (butterfl ies) feeding on nectar. It was observed 9.6% increase in fertilization of the fl owers and 7.35% in fruit production visited freely. The Africanized honeybee was more frequent species in the fl owers. There was an increase in fruit set of fl owers with the presence of insects. The fruits that were visited by pollinators were higher, sweeter, with more seeds and quantity of juice.

Chud T.C.S.,São Paulo State University | Caetano S.L.,Centro Universitario Da Fundacao Educacional Of Barretos | Buzanskas M.E.,São Paulo State University | Grossi D.A.,University of Guelph | And 5 more authors.
Livestock Science | Year: 2014

The aim of this study was to estimate variance and covariance components for gestation length (GL), birth weight (BW), weaning weight (WW), and accumulated productivity (ACP), and their respective genetic trends for Nellore cattle raised in Brazil. The ACP trait is a reproduction index developed by the National Association of Breeders and Researchers (ANCP) and comprises the total number of calves born per dam, weight of weaned calves, and age of the dam at calving. A total of 25,085, 46,911, 50,044, and 7351 observations were considered to analyze GL, BW, WW, and ACP. Genetic parameters were estimated by the Average Information Restricted Maximum Likelihood method in single and two-trait analyses. The average direct heritability estimates obtained in two-trait analyses were equal to 0.38±0.03 (GL), 0.25±0.02 (BW), 0.28±0.02 (WW), and 0.11±0.02 (ACP). The highest genetic correlation was found between BW and WW (0.36±0.05), followed by BW and ACP (0.20±0.09), and BW and GL (0.19±0.06). Significant direct genetic trends (. P<0.001) were observed for GL, BW, and WW equal to -0.027 days per year, 0.073. kg per year, and 0.8456. kg per year, respectively. Greater emphasis should be given to accumulated productivity and gestation length traits in order to increase the number and weight of weaned calves. As accumulated productivity presents low heritability estimates, genetic improvement through selection could be slow in the Nellore breed. Our study reports genetic progress for weaning weight, since its genetic trend has increased over the years. Similar genetic trend for birth weight was observed, which may be a consequence of selection towards higher body weights at older ages. © 2014 Elsevier B.V.

Coriolano Cavalcanti De Lacerda K.J.,Centro Universitario Da Fundacao Educacional Of Barretos | Coriolano Cavalcanti De Lacerda K.J.,Federal University of Paraiba
IEEE Latin America Transactions | Year: 2016

The branch of optical communications has been expanding and opening new frontiers and in view of this development, we research and develop experimental techniques, for creating optical fibers with chemicals inserted, because considering that the interaction between a beam of resonant light and an atomic vapor, result in the process known as stimulated emission can, from this process, do the interconnect of atomic physics with the optical communications, but precisely in the sensing area of high precision, because this interaction changes the modal behavior of the waveguide. This paper discusses some of the techniques developed for the creation of these optical fibers, and the development and experimental analyzes performed, with the possible applications of these techniques in telecommunications, sensing area. © 2016 IEEE.

Souza M.,Centro Universitario Da Fundacao Educacional Of Barretos | Teresinha D.,Centro Universitario Da Fundacao Educacional Of Barretos
Zootecnia Tropical | Year: 2011

This experiment was conducted in Ribeirão Preto, SP, Brazil, from November 2009 until April 2010, to identify the floral visitors and within them what are the potential pollinators in Passiflora cincinnata, the type collection made by these visitors (nectar and/or pollen) and foraging behavior of these species. The frequency and type of insect collection, during the day, were obtained by counting the first ten minutes of each hour, from dawn to dusk, with five replicates. The insects found in flowers of P. cincinnata were Oxaea flavescens (62,7%; Hymenoptera: Andrenidae), Euglossa sp. (10,1%; Hymenoptera: Apidae), Augochlora sp. (9,8%; Hymenoptera: Halictidae), Epicharis sp. (9,0%; Hymenoptera: Apidae) and Apis mellifera (8,4%; Hymenoptera: Apidae). O. flavescens, Euglossa sp., Augochlora sp. and Epicharis sp. collected nectar in the flowers. Only A. mellifera collected pollen. All the bees that visited flowers of P. cincinnata were constant: O. flavescens (100%), Euglossa sp. (66,7%), Augochlora sp. (61,1%), Epicharis sp. (58,33%) and A. mellifera (58,33%). It can be concluded that the pollinators of flowers of P. cincinnata were large bees, while the smaller species visited the flowers without effecting pollination.

Malerbo-Souza D.T.,Centro Universitario Da Fundacao Educacional Of Barretos | Silva F.A.S.,Centro Universitario Da Fundacao Educacional Of Barretos
Acta Scientiarum - Animal Sciences | Year: 2011

The objective of this experiment was to study the foraging behavior of Africanized honey bees Apis mellifera throughout the year. The collections of material were made in the experimental area at the Centro Universitário Moura Lacerda, Ribeirão Preto, São Paulo State. Once a month, for twelve months, an assessment was made of the collection of bees, by recording the number of bees entering the hive carrying pollen or nectar, from 7:00 a.m. to 6:00 p.m., 10 minutes each time, with five replications each month. Africanized honey bees A. mellifera collected nectar throughout the day, increasing the frequency until 12:00 p.m., while preferring the morning for pollen, until 11:00 a.m. It was concluded that there was no significant difference either in the collection of nectar or pollen throughout the year, but the month in which the bees collected the most and least nectar were February 2008 and July 2007, respectively; for pollen, March 2008 and September 2007, respectively. The minimum temperature for the start of the collection was 12.42°C. The low relative humidity was a limiting factor for the collection of nectar, and should be at least above 40%. This bee preferred collecting nectar (78.42%) to pollen (21.58%).

De Nobile F.O.,Centro Universitario Da Fundacao Educacional Of Barretos | Galbiatti J.A.,São Paulo State University | Muraishi R.I.,Centro Universitario Da Fundacao Educacional Of Barretos
Comunicata Scientiae | Year: 2012

The objective of this study was to evaluate the effect of organic fertilizers (urban solid waste and swine manure) as a source of nutrients and residue from bauxite processing as a corrective of soil acidity, in area cultivated with sugar cane irrigated with potable water and served in the availability of phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sulfur (S) levels in the soil and plants. For this experiment was carried out in pots, using a Alfisol, assessing the availability of the elements in the 0-20 cm layer and the concentration of these nutrients in the leaves of sugarcane. The data showed that the residues increased the concentrations of Ca and Mg in soil, as the concentration of K was not changed and S was not detected, due to the low concentration in the soil. In the leave +1 of sugarcane the residue of bauxite increased levels of N, P, K, Ca and Mg (15.68, 1.73, 10.43, 3.50 and 1.08 g kg-1, respectively). The application of urban solid waste and swine manure also increased the levels of N, K and Ca (11.56, 9.18 and 2.81 g kg-1, respectively). The quality of irrigation water did not alter the availability of P, K, Ca, Mg and S in the soil as well as the levels of these macronutrients in the plant.

De Nobile F.O.,Centro Universitario Da Fundacao Educacional Of Barretos | Prado R.M.,São Paulo State University | Spadoni T.B.,Centro Universitario Da Fundacao Educacional Of Barretos
Comunicata Scientiae | Year: 2012

The present study aimed to determine which leave will be displayed and the time of collection of this leave. The treatments consisted on five doses of nitrogen, four times for collection sampling and three types of leaves, arranged in a randomized block design with three repetitions, totalizing one hundred and forty-four experimental units. The leaves collections took place every fifteen days at thirty, forty-five, sixty and seventy five days after budbreak (DAB), collecting the laminated / compound young leaf (first leave), newly mature (second leave) and the mature leave (third leave) from the set of terminal leaflets. For this was installed an experiment with the culture of potato (cv. Atlantic), in Barretos/SP, the period of march the june of 2010. According to this data collected in this study, the best time for collecting the leaves is at 30 days after the budbreak of the potato cultivation containing nitrogen concentrations in the leaves minus heterogeneous of plants from a fraction to another and with values R2 = 0.98 being higher to the all times of harvests. To the diagnostic leaf, the highest determination coefficient was observed in the newly mature (second leaf) with R2 = 0.98. It can be observed that the highest levels of nitrogen were found on the first leaf (39.01 kg-1). Nevertheless, the values were very heterogeneous and did not fit the curve being the second leave (newly mature) the one that best represents the nutritional status of the plant. Therefore the recommendation for nutritional diagnosis will collect the recently matured leaves (2nd leaf) 30 days after budbreak.

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