Influence of osmotic dehydration process parameters on the quality of candied pumpkins

Abraão, Ana S.; Lemos, André M.; Vilela, Alice; Sousa, José M.; Nunes, Fernando M.

doi:10.1016/j.fbp.2013.04.006

Cited by 50 publications

(42 citation statements)

References 43 publications

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“…Such a large colour change was related to the colour of the fruit concentrates used for OD ( Table 1). The substance from the osmotic solution, penetrating into the dehydrated material, changed the colour of the material [42]. The longer the dehydration time is, the more the colour parameters of the samples shift toward the colour parameters of the juice.…”

Section: Values Of Determination Coefficientmentioning

confidence: 99%

The Effect of Selected Fruit Juice Concentrates Used as Osmotic Agents on the Drying Kinetics and Chemical Properties of Vacuum-Microwave Drying of Pumpkin

Lech

Figiel

Michalska

et al. 2018

Journal of Food Quality

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The study examined the osmotic dehydration of pumpkin slices in chokeberry, flowering quince, and raspberry concentrated juices. Products obtained were subjected to vacuum-microwave finish drying (VMD). The objective of the study was to evaluate the drying kinetics and the chemical properties, that is, total polyphenolics content and antioxidant capacity of the vacuum-microwave-dried pumpkin products. The concentration and temperature of the juices were 40 ∘ Brix and 45 ∘ C, respectively. The pumpkin slices were pretreated in concentrated juices for 0.5, 1, 2, 3, and 6 hours. Vacuum-microwave finish drying was carried out at the power of magnetrons that ensured the maintenance of the safe temperature (below 90 ∘ C) of the slices measured with the use of infrared camera. The results of the study showed that the moisture content of samples during the pretreatment in concentrated juices was decreasing until the equilibrium stage. The logarithmic model was used to describe the drying kinetics of pumpkin during VMD. Osmotic pretreatment resulted in a decrease in colour coordinates, improved the antioxidant activity of dried product, and prolonged the duration of VMD.

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Section: Values Of Determination Coefficientmentioning

confidence: 99%

The Effect of Selected Fruit Juice Concentrates Used as Osmotic Agents on the Drying Kinetics and Chemical Properties of Vacuum-Microwave Drying of Pumpkin

Lech

Figiel

Michalska

et al. 2018

Journal of Food Quality

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show abstract

“…Las determinaciones se realizaron a 28,1 ±0,2°C, a velocidad de 30 mm/min, hasta comprimir la muestra 90% de su altura inicial, registrándose los valores fuerza (N)-distancia (mm). Estos valores se transformaron en esfuerzo (), y deformación de Hencky ( mediante las Ecuaciones 1 y 2, respectivamente [24], formándose la curva típica de esfuerzo-deformación de Hencky. Esta curva se analizó en términos de los parámetros mecánicos: Esfuerzo de fractura (), Deformación de fractura () y el modulo elástico o elasticidad (ME) [12], el es el máximo esfuerzo que soporta el material antes de la ruptura macroscópica, es el pico más alto de la curva esfuerzo-deformación; este esfuerzo está relacionado con la dureza de las muestras y con su resistencia a la fractura.…”

Section: Medida De Propiedades Fisicoquímicas Y Mecánicasunclassified

Cambios en Propiedades Mecánicas Durante La Deshidratación Osmótica De Pitahaya Amarilla

Aponte

Ramirez

Serna-Cock

2017

BSAA

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“…The content was then analysed through high performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD, ICS-3000, Dionex). The different sugars separation was performed with a CarboPac PA-20 column (150 × 3 mm), with a CarboPac PA20 pre-column (Dionex) using an isocratic elution with a 10 mM NaOH solution containing 2 mM Ba(OH) 2 (Abraão et al 2013). Calibration curves were constructed for glucose, fructose, and sucrose.…”

Section: Quantification Of Nectar and Pollen Sugar Contentmentioning

confidence: 99%

Higher longevity and fecundity of Chrysoperla carnea, a predator of olive pests, on some native flowering Mediterranean plants

Gonzalez

Nave

Gonçalves

et al. 2016

Agron. Sustain. Dev.

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Biological control is the use of natural enemies, such as predators, of crop pests. For instance, Chrysoperla carnea (Stephens) is a major predator of olive grove pests. To favor the abundance of C. carnea, flowering plants should provide them with carbohydrates. However, there is a lack of knowledge on the biology of flowering plants that grow in olive groves. Therefore, we studied in the laboratory 11 native Mediterranean plants commonly found in traditional olive orchards as food sources for C. carnea adults. Male and female longevity and female lifetime fecundity were measured on a daily base. Plant nectar and pollen were quantified by highperformance anion-exchange chromatography analysis (HPAEC-PAD). Our results show that the longevity of C. carnea females was higher, of 17 days, when fed with Conopodium majus flowers, and of 14 days when fed with Lonicera hispanica flowers. Female fecundity was higher for C. carnea individuals fed with C. majus, giving 71 eggs, and with Foeniculum vulgare, giving 66 eggs, than for C. carnea individuals fed with L. hispanica (19 eggs) and Asparagus acutifolius (4 eggs). These findings are explained by the higher concentration of trehalose in plant nectar and pollen. To our knowledge, this is the first study evaluating the sugar profile and content of Mediterranean flower plants as food resource of C. carnea adults indicating that trehalose content in pollen and nectar has a key role in C. carnea fecundity and longevity.

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Influence of osmotic dehydration process parameters on the quality of candied pumpkins

Cited by 50 publications

References 43 publications

The Effect of Selected Fruit Juice Concentrates Used as Osmotic Agents on the Drying Kinetics and Chemical Properties of Vacuum-Microwave Drying of Pumpkin

The Effect of Selected Fruit Juice Concentrates Used as Osmotic Agents on the Drying Kinetics and Chemical Properties of Vacuum-Microwave Drying of Pumpkin

Cambios en Propiedades Mecánicas Durante La Deshidratación Osmótica De Pitahaya Amarilla

Higher longevity and fecundity of Chrysoperla carnea, a predator of olive pests, on some native flowering Mediterranean plants

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