Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Water uptake by Annona diversifolia Saff. and A. purpurea Moc. & sessé ex dunal seeds (Annonaceae)

Annonaceae seeds are known by presenting dormancy mechanisms, whose reports ranging from coating impermeable to the physiological dormancy. By this way, the present study aimed to evaluate water uptake in Annona diversifolia Saff and Annona purpurea Moc & Sessé ex Dunal seeds. For this study, seeds were placed under immersion in distilled water, and used four replicates of 25 seeds of each species, which were weighed during the 480 hours that were immersed. To determine the place of purchase of water, Annona diversifolia seeds were sealed with paraffin at different locations. Based on the results, seeds from both species reached the phases I and II of water uptake, which indicates they are not hard; however, germination (Phase III) was not reached. Annona diversifolia seeds completed Phase I with, 50h and Annona purpurea with 70h from imbibitions begin, which shows that even slowly, water is acquire.

Ácido cítrico e quitosana na conservação de lichias 'Bengal'

The aim of this study was to evaluate citric acid application with or without chitosan on the maintenance of the quality of litchi 'Bengal'. It was used litchi on mature maturation stage. After selection, fruits were immersed for one minute on the solution of citric acid and chitosan: [1]Control - without immersion; [2] citric acid 300g L-1, [3] citric acid 300 g L-1 + chitosan 0,3%, [4]citric acid 300 g L-1 + chitosan 0,6%, [5] citric acid 600 g L-1, [6] citric acid 600 g L-1 + chitosan 0,3%, [7] citric acid 600 g L-1 + chitosan 0,6%. Chitosan of low molecular weight and deacetylation degree of 75,58% (Sigma - Aldrich®) were used. After immersion, fruits were put to drain the excess of solution. Then, they were stored in cool chamber at 5ºC, previously sanitized, for 20 days. The experiment was conducted following a completely randomized design, with a factorial scheme composed by seven coating solutions and five sampling dates. Every five days were evaluated: loss of fresh mass of fruits; color; content of anthocyanins and the activity of peel enzymes polyphenoloxidase and peroxidase. It was verified that the solution of citric acid 600 g L-1, associated or not to chitosan, and the combination of chitosan 0,3% to 300 g L-1 of citric acid were the most efficient to maintain the quality of litchi 'Bengal' for 20 days at 5ºC.

Degradação de membrana impermeabilizante de polietileno de alta densidade usada em tanques de armazenamento de vinhaça

High-density polyethylene (HDPE) water-proof membranes are used as coatings in vinasse (leachate from sugar cane) storage tanks. The leachate is pumped into the tanks at temperatures of 80-90 °C. Due to these high temperatures and acidity of the waste, these membranes can be degraded, cracked and then loose the function for which they have been designed. This may cause contamination of the soil and groundwater. This study evaluated the effect of vinasse in HDPE membranes after 4 months of exposure in a controlled environment. An aggressive, alkaline pH liquid (sodium hydroxide) was also used. The objective was to evaluate the membrane resistance in contact with acidic and alkaline residues. Physical and mechanical tests, measurement of the carbon black content and thermo gravimetric analysis (TGA) were used to determine degradation of polymer membranes after chemical immersion. While sodium hydroxide resulted caused only minor changes in the physical properties, vinasse induced a thickness change of 7.8%. With immersion in vinasse, an average decrease in strength and deformability (yield) of 34% and 23.5% were measured, respectively. The stiffness increased by 7.8% (average) and the tear strength decreased by 2.7% (average).

Confluências histórico-técnicas no conceito de micropolifonia (1956-1966)

Pós-graduação em Música - IA

Plásticos comerciais tratados a plasma para dispositivos ópticos e embalagens alimentícias

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de um biorreator rotativo para produção de enzimas celulolíticas por fermentação em estado sólido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo prospectivo do desenvolvimento biométrico de olhos com catarata congênita e do desenvolvimento

Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB

Comparison of pain threshold and duration of pain perception in men and women of different ages

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Tetrazolium test for assessment of seed viability of atemoya (Annona cherimola Mill. x A. squamosa L.)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Propagação de variedades de caramboleira por estaquia herbácea

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Alteração volumétrica por análise microtomográfica, solubilidade e capacidade seladora bacteriana de diferentes materiais retro-obturadores

Pós-graduação em Odontologia - FOAR

Transporte placentário via cavéola na placenta de bovinos clonados e transgênicos

Pós-graduação em Ciência e Tecnologia Animal - FEIS

Avaliação de uma nova composição de agente clareador sobre a microdureza do esmalte: associação do trimetafosfato de sódio e fluoreto de sódio ao peróxido de hidrogênio a 10%

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Jogos digitais no ensino de matemática: o desenvolvimento de um instrumento de apoio ao diagnóstico das concepções dos alunos sobre diferentes representações dos números

Pós-graduação em Educação para a Ciência - FC