Antioxidant and antimicrobial properties of organic fruits subjected to PEF-assisted osmotic dehydration

Tylewicz, Urszula; Oliveira, Gabriel; Alminger, Marie; Nohynek, Liisa; Rosa, Marco Dalla; Romani, Santina

doi:10.1016/j.ifset.2020.102341

Cited by 32 publications

(35 citation statements)

References 44 publications

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“…Osmotic dehydration reduced antioxidant activity of all investigated samples by 29-53%, 14-72%, and 48-67% when compared to the fresh material for DPPH, ABTS and RP assays, respectively (Figure 3). Tylewicz et al [5] reported no significant changes or decreases in free radical scavenging activity of OD strawberries for DPPH and ORAC assay, respectively. In turn, Kowalska et al [53] reported that OD in sucrose can improve the antioxidant activity of strawberries, which clearly shows that variety and origin of fruit are of paramount importance.…”

Section: Antioxidant Activity Of Organic Strawberries Subjected To Os...mentioning

confidence: 98%

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The Influence of Polyols on the Process Kinetics and Bioactive Substance Content in Osmotic Dehydrated Organic Strawberries

et al. 2022

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In recent years, an increasing interest in reducing sugar consumption has been observed and many studies are conducted on the use of polyols in the osmotic dehydration process to obtain candied or dried fruits. The studies in the literature have focused on the kinetics of the process as well as the basic physical properties. In the scientific literature, there is a lack of investigation of the influence of such polyol solutions such as sorbitol and mannitol used as osmotic substances during the osmotic dehydration process on the contents of bioactive components, including natural colourants. Thus, the aim of the study was to evaluate the impact of polyols (mannitol and sorbitol) in different concentrations on the process kinetics and on chosen physical (colour and structural changes) as well as chemical (sugars and polyol content, total anthocyanin content, total polyphenol content, vitamin C, antioxidant activity) properties of osmotic-dehydrated organic strawberries. Generally, the results showed that the best solution for osmotic dehydration is 30% or 40% sorbitol solutions, while mannitol solution is not recommended due to difficulties with preparing a high-concentration solution and its crystallization in the tissue. In the case of sorbitol, the changes of bioactive compounds, as well as colour change, were similar to the sucrose solution. However, the profile of the sugar changed significantly, in which sucrose, glucose, and fructose were reduced in organic strawberries and were partially replaced by polyols.

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Section: Antioxidant Activity Of Organic Strawberries Subjected To Os...mentioning

confidence: 98%

“…For this reason, technological operations are used to preserve the fruits [4]. Furthermore, in recent years, due to environmental pollution and greater interest in a healthy diet, there has been a growing interest in organic fruit and vegetables [5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Polyols on the Process Kinetics and Bioactive Substance Content in Osmotic Dehydrated Organic Strawberries

et al. 2022

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“…Antimicrobial activity in cultures spiked with terpene compounds and extracts was tested as previously described [ 37 ] with modifications [ 38 ], or using an automated Bioscreen turbidimeter (Labsystems, Helsinki, Finland) [ 39 ]. Pure standard compounds (lactucopicrin, 11β-13-dihydrolactucopicrin, lactucin and parthenolide) and extracts were tested against S. aureus VTT E-70045 (ATCC 6538), P. aeruginosa VTT E-96728 (ATCC 9027) and E. coli VTT E-94564 T (ATCC 11775) in Mueller-Hinton broth (Sigma-Aldrich, St Louis, MO, USA).…”

Section: Methodsmentioning

confidence: 99%

Chicory Extracts and Sesquiterpene Lactones Show Potent Activity against Bacterial and Fungal Pathogens

et al. 2021

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Chicory (Cichorium intybus L.) is an important industrial crop cultivated mainly to extract the dietary fiber inulin. However, chicory also contains bioactive compounds such as sesquiterpene lactones and certain polyphenols, which are currently discarded as waste. Plants are an important source of active pharmaceutical ingredients, including novel antimicrobials that are urgently needed due to the global spread of drug-resistant bacteria and fungi. Here, we tested different extracts of chicory for a range of bioactivities, including antimicrobial, antifungal and cytotoxicity assays. Antibacterial and antifungal activities were generally more potent in ethyl acetate extracts compared to water extracts, whereas supercritical fluid extracts showed the broadest range of bioactivities in our assays. Remarkably, the chicory supercritical fluid extract and a purified fraction thereof inhibited both methicillin-resistant Staphylococcus aureus (MRSA) and ampicillin-resistant Pseudomonas aeruginosa IBRS P001. Chicory extracts also showed higher antibiofilm activity against the yeast Candida albicans than standard sesquiterpene lactone compounds. The cytotoxicity of the extracts was generally low. Our results may thus lead to the development of novel antibacterial and antifungal preparations that are both effective and safe for human use.

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“…En relación con eso, varios grupos de investigación 4,16,17,52,53,54,55,56,57 reportaron resultados significativos de estos compuestos bioactivos en jugo de naranja, jugo de fresa, gingseng, extracto de stevia, vino, damasco deshidratado, remolacha, jugo de cactus (Opuntia dillenii) (Tabla 1). Los compuestos fenólicos en bayas y frutas en general son bien conocidos por sus propiedades antimicrobianas y, por lo tanto, el pretratamiento con PEF de las bayas que mantienen fenólicos puede aumentar también su potencial antimicrobiano 58 reduciendo el uso de conservantes.…”

Section: Efecto De Pefunclassified

Tecnología emergente: Campo de pulsos eléctricos (PEF) para el tratamiento de alimentos y su efecto en el contenido de antioxidantes

et al. 2021

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Antioxidant and antimicrobial properties of organic fruits subjected to PEF-assisted osmotic dehydration

Cited by 32 publications

References 44 publications

The Influence of Polyols on the Process Kinetics and Bioactive Substance Content in Osmotic Dehydrated Organic Strawberries

The Influence of Polyols on the Process Kinetics and Bioactive Substance Content in Osmotic Dehydrated Organic Strawberries

Chicory Extracts and Sesquiterpene Lactones Show Potent Activity against Bacterial and Fungal Pathogens

Tecnología emergente: Campo de pulsos eléctricos (PEF) para el tratamiento de alimentos y su efecto en el contenido de antioxidantes

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