Ribeirão Preto, Brazil
Ribeirão Preto, Brazil

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Galo J.Q.B.,Federal University of Acre | Mattiuz C.F.M.,Centro Universitario Moura Lacerda
Revista Brasileira de Fruticultura | Year: 2014

Papaya is a fruit of great economic, social and nutritional importance. However, due to limited conservation presents post-harvest deterioration and rapid maturation. Therefore, the objective of this study was to use solutions of chitosan associated with glycerol as papaya coating to maintain postharvest quality and prolong its life. The fruits were washed in clean water, cleaned in sodium hypochlorite solution 200 mg L-1 for 10 minutes and dried at room temperature. The treatments consisted of immersion or not (control) of the fruits at five different concentrations (0.25%, 0.50%, 0.75%, 1.0% and 1.25%) of chitosan. Elapsed the natural drying of the coating, the fruits were stored at 28 ± 3 °C and 65-70% RH. We used a completely randomized design considering the treatments the six concentrations of chitosan with eight replications, totaling 48 fruits. Upon reaching the optimum stage for consumption, it was evaluated the content of ascorbic acid, soluble solids, titratable acidity, firmness, weight loss, fungal development and lifespan. The application of chitosan in papaya ‘Sunrise Solo’ maintained the firmness, the soluble solids, the titratable acidity, the ascorbic acid of the fruit to the point considered of optimal consumption, in terms of appearance. The concentration of 1% of chitosan maintained quality and increased service life of the fruit in four days. Chitosan inhibited the growth of fungi of the genera Cladosporium, Aspergillus and Penicillium. © 2014, Sociedade Brasileira de Fruticultura. All rights reserved.

de Oliveira E.A.,Centro Universitario Moura Lacerda | de Oliveira E.A.,University of Ribeirão Preto | Pisani Junior R.,Federal University of São Carlos
Engenharia Sanitaria e Ambiental | Year: 2015

The Technical Standard CETESB P2.111/2007 was tested to evaluate the microwave healthcare waste disinfection, by comparing the results obtained using the standard procedure, i.e. Bacillus atropheus spores in suspension inside vials distributed in the waste, with those obtained with spores dispersed on the particles surface. The experimental results were adjusted based on first-order kinetic model and Arrhenius Law to determine the activation energies (Ea) and the pre-exponential factors (k0). The Ea in spores suspension inside vials (99–45 J.mol-1) were significantly lower when compared with Ea (9,203–5,782 J.mol-1) from the inactivation of dispersed spores in the waste to k0 practically constant (0.26 and 0.23 min-1, respectively). Therefore, spore resistance to inactivation was greatly affected by the support medium used, since the spores were more susceptible to microwave exposition in liquid medium than in the solid one. © 2015, ABES - Associacao Brasileira de Engenharia Sanitaria e Ambiental. All rights resevred.

Zera F.S.,Instituto Agronomico Of Campinas | Schiavetto A.R.,São Paulo State University | Lorenzato C.M.,Centro Universitario Moura Lacerda
Planta Daninha | Year: 2011

This work aimed to evaluate the tolerance of sugarcane cultivars to sulfentrazone, imazapic, isoxaflutole, clomazone and ametryn + trifloxysulfuron-sodium. The experiment was arranged in a randomized block design in a split-plot scheme. The cultivars were allocated to the plots and the herbicides to the sub-plots (five 8.0 m long rows and 1.5 m spacing, with 4 repetitions. The herbicides sulfentrazone (0.8 kg ha -1), imazapic (0.147 kg ha -1), isoxaflutole (0.1125 kg ha -1), clomazone (1.1 kg ha -1), ametryn (1.463 kg ha -1) + trifloxysulfuron sodium (0.037 kg ha -1) and control were evaluated on 3-yr-old ratoons of the cultivars IACSP94-2094, IACSP94-2101, IACSP93-3046, IACSP94-4004, IAC86-2480 and RB72454 in post emergence. The traits evaluated were: plant toxicity symptoms in the plant leaves; total chlorophyll content and photochemical efficiency (Fv/Fm) at 15, 30 and 60 days after application (DAA); height (cm) at 30 and 270 DAA, and plant stand (stalk m-1) at 30 and 180 DAA. Diameter (cm), estimated productivity (t ha -1) and quality analysis were evaluated at 270 DAA. The sugarcane cultivars IACSP94-2094, IACSP93-3046, IACSP94-4004, IAC86-2480, RB72454, and IACSP94-2101 especially, were susceptible to clomazone up to 30 DAA, due to leaf chlorosis and lower chlorophyll content, but had no effect on quality characteristics and productivity. The cultivars were also tolerant to other herbicides.

Cardoso R.A.,Centro Universitario do Triangulo | Pires L.T.A.,Centro Universitario Moura Lacerda | Zucchi T.D.,University of Sao Paulo | Zucchi F.D.,University of Sao Paulo | Zucchi T.M.A.D.,University of Sao Paulo
Genetics and Molecular Research | Year: 2010

Some herbicides are suspected of promoting teratogenic, carcinogenic and mutagenic events. Detection of induced mitotic crossing-over has proven to be an indirect way of testing the carcinogenic properties of suspicious substances, because mitotic crossing-over is involved in the multistep process of carcinogenesis. We examined mitotic crossing-over induced by two commercial herbicides (diuron and trifluralin) in diploid strains of Aspergillus nidulans based on the homozygotization index. Low doses (2.5 μg/mL) of diuron were sufficient to increase the mean homozygotization index in 2.1 and 11.3 times for UT448// UT196 and Dp II-I//UT196, respectively, whereas the same dose of tri-fluralin increased this mean only 1.2 (UT448//UT196) and 3.5 (Dp II-I// UT196) times, respectively. The lower homozygotization index value found for trifluralin could be due to its interference with mitotic crossingover in eukaryotic cells. We concluded that the diploid Dp II-I//UT196 of A. nidulans is more sensitive to organic compounds than UT448//UT196; these compounds cause recombinational events at a greater frequency in the latter diploid. This system holds promise as an initial test for carcinogenicity of organic compounds, including herbicides.

de Souza M.L.,Federal University of Acre | Morgado C.M.A.,São Paulo State University | Marques K.M.,São Paulo State University | Mattiuz C.F.M.,Centro Universitario Moura Lacerda | Mattiuz B.-H.,São Paulo State University
Revista Brasileira de Fruticultura | Year: 2011

The objective of this work was to evaluate the influence of chitosan in the post-harvest of 'Tommy Atkins' mangoes, harvested in the semi-ripe stage and stored at 23°C (65% RH). Mangoes from CEAGESP, Ribeirão Preto, SP, Brazil were transported to the Laboratory of Technology of Agricultural Products of UNESP Jaboticabal. After selection, the fruits were washed and the surface sanitized with a solution of dichloro s. triazinatriona sodium dihydrate (Sumaveg®) 200 mg 100g -1 of free chlorine for 10 minutes, dried, dipped in solution 0%; 1.0%; 1.5%; 2.0% oh chitosan for 1 minute, dried under ventilation, packed in trays and stored at 23±2°C and 65±5% UR for 9 days. Three replicates of two fruits each were used. The fruits every three days had the weight loss, the color, the firmness, the ascorbic acid content, the soluble solids, the titratable acidity and the soluble solids / titratable acidity evaluated. The coating with chitosan delayed the ripening of 'Tommy Atkins' semi-ripe mangoes stored at 23°C. The concentration of 1.5% provided better maintenance of color, firmness, ascorbic acid content, soluble solids, titratable acidity and soluble solids / titratable acidity.

Dalri A.B.,Centro Universitario Moura Lacerda | Cortez G.E.P.,São Paulo State University | Riul L.G.S.,CERP Centrais Energeticas de Ribeirao Preto | Araujo J.A.C.,São Paulo State University | Cruz R.L.,São Paulo State University
IRRIGA | Year: 2010

The objective of this study was to analyze effects in different depth in soil water infiltration and to verify the Horton and Kostiakov-Lewis models adequacy in infiltration rate estimate. The treatments were five doses of vinasse (0, 200, 250, 300 and 350 m3?ha1?. The vinasse application reduced the soil erosion risk increasing the possibility of runoff. The Horton model had the best adjustment on the observed data, and the Kostiakov-Lewis model overestimated the infiltration rate values.

Ferracioli I.J.C.,Centro Universitario Moura Lacerda | Ferracioli M.C.,Centro Universitario Moura Lacerda | de Castro I.J.,University of Brasilia
Revista Brasileira de Cineantropometria e Desempenho Humano | Year: 2013

People from all age groups and social backgrounds have always sought to learn swimming. However, the swimming learning process is usually considered repetitive and tiring, requiring the teacher to use methods that motivate students to join the practice without ignoring the need for improvement in their performance. This study assessed motivation during a breaststroke learning process in students who received videotape feedback, verbal feedback, and who did not receive any feedback during practice. Thirtyseven swimming inexperienced students were divided into three groups: Video (n=13), which received videotape feedback; Verbal (n=15), which received verbal feedback; and Control (n=9), which did not receive any feedback during experimental phases (pre-test, acquisition (5 days), post-test and retention). Participants completed a questionnaire based on Likert scale for motivation assessment. Scores were given to their performance by a swimming teacher to assess breaststroke learning during each experimental phase. Results of motivation assessment showed that students who received feedback (videotape or verbal) felt more motivated during practice than those who did not receive any feedback. Regarding the breaststroke learning, all participants improved their performance along experimental phases, but, during the retention one, Verbal group's performance was considered superior to the Control group's performance. This study concluded that the use of videotape and verbal feedback has motivational results on breaststroke learning, and that it is effective in the learning process.

Spricigo P.C.,University of Campinas | Mattiuz B.-H.,São Paulo State University | de Pietro J.,São Paulo State University | Mattiuz C.F.M.,Centro Universitario Moura Lacerda | de Oliveira M.E.M.,University of Campinas
Ciencia e Agrotecnologia | Year: 2010

The durability and postharvest quality of cut flowers are fundamental attributes in value along the production chain and in consumer satisfaction. The objective of this study was to evaluate the effect of chemical inhibitors of ethylene action on maintaining the postharvest quality of chrysanthemum stems (Chrysanthemum morifolium Ramat cv. Dragon). The experiment tested maintenance solutions with silver thiosulfate (STS) under five levels (distilled water, a 0.2 mM STS, the STS 0.2 mM + sucrose at 50 g L-1, STS at 0.4 mM; STS at 0.4 mM + sucrose at 50 g L-1), and date of sampling, for three levels (0, 3, 6 days). Three replications with two flower stems in each treatment were used in the experiment. Physical assessments were made: color, fresh mass and relative water content; chemical evaluations: reducing sugars and pigments, and qualitative assessments: turgidity, flower color, and number of buds, open flowers and partially open flowers. Treatment with 0.2 mM STS resulted in better maintenance of fresh mass of stems. The concentration of pigments and reducing sugar was higher in those treatments in which sucrose was associated. The color and relative water content were favored in treatments STS 0.2 mM and 0.4 mM. The concentration of 0.2 mM STS obtained the best results, prolonging the vase life the stems. The quality of these stems was higher, with the best assessments of water content, color and turgidity.

Spricigo P.C.,University of Campinas | Mattiuz B.-H.,São Paulo State University | de Pietro J.,São Paulo State University | Mattiuz C.F.M.,Centro Universitario Moura Lacerda | de Oliveira M.E.M.,University of Campinas
Ciencia e Agrotecnologia | Year: 2010

The development and use of techniques that extend the life vase of the flowers, maintaining the quality of the product, is essential for reducing postharvest losses. The objective of this work was to evaluate different solutions for maintenance, associated or not to sucrose, in maintaining the postharvest quality of chrysanthemum stems. The treatments used distilled water, 8-HQC to 100 mg L -1, 8-HQC to 100 mg L -1 + sucrose 50 g L -1, 8-HQC to 200 mg L -1, 8-HQC to 200 mg L -1 + sucrose 50 g L -1. Physical assessments were made: color, fresh mass and relative water content; chemical evaluations: reducing sugars and pigments, and qualitative assessments: turgidity, color of the flowers, and number of buttons, open flowers and partially open flowers. The combination of 8-HQC 200 mg L -1 + sucrose 50 g L -1 was the best performance that made for maintaining the quality of flower stems, favoring the opening of buttons and turgidity of petals. Sucrose contributed to better maintenance of the reserve substances in the shaft, which had increased the flower vase life.

Malerbo-Souza D.T.,Centro Universitario Moura Lacerda
Acta Scientiarum - Agronomy | Year: 2011

This experiment was conducted on the campus of the University Center Moura Lacerda, Ribeirão Preto, in 2009 and 2010 with the objective of verifying the attractiveness of corn pollen for the Africanized honeybees Apis mellifera. The frequency of these bees, and the foraging behavior and stability were obtained by counting the first 10 min. of each hour, from 7.00 to 18.00, on three different days. Africanized honey bees collected only pollen in male flowers of maize, with a peak frequency of 9.00 in 2009 and between 16.00 and 17.00 in 2010. The corn pollen was very collected by Africanized honey bees, an important food source for these bees.

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