35 documents found, page 1 of 4
Drying intensification combining ultrasound pre-treatment andultrasound-assiste...
Magalhães, Madson L.; Cartaxo, Samuel J. M.; Gallão, Maria Izabel; García-Pérez, Jose V.; Cárcel, Juan A.; Rodrigues, Sueli; Fernandes, Fabiano A. N.The water effective diffusivity can be increased in air drying of fruits and vegetables by applying an ultrasonic pre-treatment in ultrasonic baths or by directly applying ultrasound during air-drying. This work has examined the influence of the combination of both techniques on the dehydration of apple cubes (Malus domestica L. var Royal Gala). Experiments were carried out drying apples using conventional conv...
Protective effect of natural and processed coconut water by non-thermal technol...
Miguel, Thaiz Batista Azevedo Rangel; Porto, Elaine Cristina Maciel; Pinheiro, Sergimar Kennedy de Paiva; Miguel, Emilio de CastroCoconut water is widely consumed and appreciated due its sensory, nutritional, and functional characteristics. Despite being widely consumed, this beverage has a short shelf life that can be improved through processing technologies including nonthermal technologies. Although this processing is promising, it also can generate toxic bioactive compounds of natural and synthetic origin. Their safety has been long d...
Multivariate analysis as a tool for selecting the vine pruning pretreatment tow...
Alves Filho, Elenilson Godoy; Maciel, Tatiane Cavalcante; Gudiña, Eduardo; Miguel, Emilio de Castro; Rodrigues, Ligia R.; Rodrigues, SueliLignocellulosic materials require pretreatment to remove lignin enabling the enzyme access to the cellulose. This work used multivariate analysis to investigate the acid and alkali pretreatments of vine pruning followed by enzymatic hydrolysis. The best acid pretreatment conditions were H2SO4 1.5%, 120 �C for 30 min, removing 68.7% of hemicellulose, enabling 95.8% of cellulose recovery. However, this treatment ...
Ultrasound processing to enhance drying of cashew apple bagasse puree: Influenc...
Fonteles, Thatyane Vidal; Leite, Ana Karoline Ferreira; Silva, Ana Raquel Araújo; Carneiro, Alessandra Pinheiro Góes; Miguel, Emilio de CastroThe present study has evaluated the effects of power ultrasound pre-treatment on air-drying and bioactive compounds of cashew apple bagasse. The sonication induced the disruption of cashew bagasse parenchyma, which resulted in lower resistance to water diffusion, less hysteresis, and increased rehydration rate. The processing did not affect the lignocellulose fibers or the clerenchyma cells. For sonicated sampl...
Cold plasma processing effect on cashew nuts composition and allergenicity
Alves Filho, Elenilson G.; Silva, Lorena Mara A.; Oiram Filho, Francisco; Rodrigues, Sueli; Fernandes, Fabiano A. N.; Gallão, Maria IzabelThe study investigated the influence of atmospheric plasma processing on cashew nut composition as well as on its allergenicity. The cashew nuts were processed by low-pressure plasma, using glow discharge plasma (80 W and 50 kHz power supply). Anacardic acids and allergens were quantified by HPLC and immunoassay, respec- tively. Additionally, the overall composition was evaluated by 1H qNMR. Increases in amount...
Dehydration of Malay apple (Syzygium malaccense L.) using ultrasound as pre-tre...
Oliveira, Francisca I. P.; Gallão, Maria Izabel; Rodrigues, Sueli; Fernandes, Fabiano A. N.This work examined the influence of the ultrasonic pre-treatment prior to air-drying on dehydration of jambo (Syzygium malaccense L.) also known as Malay apple. This study allowed estimate water loss and sugar gain during the pre-treatment and the effective water diffusivity in the air-drying process for jambo subjected to ultrasonic pretreatment. Results showed that during the ultrasonic treatment, in distille...
Ultrasound-assisted osmotic dehydration of strawberries: effect of pretreatment...
Garcia-Noguera, Juan; Oliveira, Francisca I. P.; Gallão, Maria Izabel; Weller, Curtis L.; Rodrigues, Sueli; Fernandes, Fabiano A. N.Pretreatment of fruits prior to drying has shown success in reducing drying time and costs. In this work, ultrasound-assisted osmotic dehydration has been implemented as a method to increase water diffusivity and reduce drying time in strawberries. Strawberry halves were immersed in distilled water and in two different concentrations of sucrose solutions while pretreatment time and ultrasonic frequency levels w...
Effect of immersion time in osmosis and ultrasound on papaya cell structure dur...
Rodrigues, Sueli; Oliveira, Francisca I. P.; Gallão, Maria Izabel; Fernandes, Fabiano A. N.The effect of ultrasound-assisted osmotic dehydration applied at atmospheric pressure for different lengths of time on papaya tissue structure was evaluated. Ultrasound induced the loss of cellular adhesion, formation of large cell interspaces, and light rupture of the cell walls. The changes in the tissue structure caused by ultrasound application increased sugar loss, water loss, and effective water diffusivi...
Effect of osmotic dehydration and ultrasound pre-treatment on cell structure: M...
Fernandes, Fabiano A. N.; Gallão, Maria Izabel; Rodrigues, SueliThe effect of osmotic dehydration and of ultrasound pre-treatment applied at atmospheric pressure for different lengths of time on melon tissue structure was evaluated. Osmotic dehydration-induced gradual loss of shape of cell wall, disconnection between the cells and breakdown of the tissue. Ultrasound induced the formation of microscopic channels in the fruit structure but did not induce breakdown of the tiss...
Sustainable lipase production by Diutina rugosa NRRL Y-95 through a combined us...
Freitas, M.; Cavalcante, Lucas S.; Gudiña, Eduardo José; Silvério, Sara Isabel Cruz; Rodrigues, Sueli; Rodrigues, L. R.; Gonçalves, Luciana R. B.The potential use of alternative culture media towards the development of a sustainable bioprocess to produce lipases by Diutina rugosa is clearly demonstrated. First, a synthetic medium containing glucose, peptone, yeast extract, oleic acid, and ammonium sulfate was proposed, with lipase activity of 143 U/L. Then, alternative culture media formulated with agro-industrial residues, such as molasses, corn steep ...