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Emma Cantos-villar - One of the best experts on this subject based on the ideXlab platform.
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Impact of preharvest and Postharvest Treatment combinations on increase of stilbene content in grape
OENO One, 2013Co-Authors: Maria Isabel Fernández-marín, Raúl F. Guerrero, Belén Puertas, Maria Carmen García-parrilla, Isidro G. Collado, Emma Cantos-villarAbstract:Aims: Stilbene-enriched grape is an interesting new food product with numerous health-promoting properties, mainly due to its high added-value compound content, notably resveratrol. The aim of this study was to evaluate the effects of different elicitors, alone or in combination with ultraviolet C light (UVC) Postharvest Treatment, on stilbene concentration in grapes.Methods and results: Three preharvest Treatments were tested, namely benzothiadiazole, (BTH), methyl jasmonate (MEJA) and chitosan (CHIT). After harvesting, these Treatments were combined with UVC Postharvest Treatment. The stilbene extraction method was validated method. Moreover, and grape quality was evaluated. Of the preharvest Treatments, only BTH significantly increased trans-resveratrol concentration in grape, but this appears to be linked to a ripening delay. When pre- and Postharvest Treatments were combined, only the MEJA-UVC combination was successful in reducing by three days the day of maximum induction of stilbenes (trans-resveratrol and piceatannol).Conclusion: The MEJA-UVC combination reached similar grape trans-resveratrol contents than UVC alone, but additionally the time to reach maximum trans-resveratrol after the UVC Treatment was reduced by three days and therefore grape quality was preserved.Significance and impact of the study: The achieved results provide a potential Treatment combination that allows functional grapes to be obtained in a shorter period than with UVC light alone, making it more applicable.
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Isorhapontigenin: A novel bioactive stilbene from wine grapes
Food Chemistry, 2012Co-Authors: Maria Isabel Fernandez-marin, Raúl F. Guerrero, Belén Puertas, Maria Carmen Garcia-parrilla, Tristan Richard, Miriam Adriana Rodriguez-werner, Peter Winterhalter, Jean-pierre Monti, Emma Cantos-villarAbstract:Stilbenes are a family of bioactive compounds found in plants. However, only a few stilbenes are present in the human diet. Grape and wine are the main dietary source of stilbenes, resveratrol and piceid being the most common ones. Ultraviolet C light (UVC) Postharvest Treatment was used to obtain significantly increased stilbene concentration in grapes. A new, previously undescribed-in-grapes stilbene was found after UVC Treatment. The process followed to isolate and identify this unknown stilbene is described in the present work. This isolation involved several fractionation steps including counter current chromatography and semi-preparative HPLC due to its low concentration and the presence of structurally related compounds. The structure of the compound was unequivocally identified by NMR spectroscopy analyses including H-1-NMR; COSY; ROESY; HSQC and HMBC. The compound was identified as isorhapontigenin (ISOR), a stilbene found in traditional Asian medicinal plants. To the best of our knowledge this is the first report of its occurrence in grapes. (C) 2012 Elsevier Ltd. All rights reserved.
Maria Serrano - One of the best experts on this subject based on the ideXlab platform.
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Effect of Various Postharvest Treatment on Aroma Volatile Compounds of Blood Orange Fruit Exposed to Chilling Temperature After Long-Term Storage
Food and Bioprocess Technology, 2020Co-Authors: Fariborz Habibi, Fabian Guillen, Maria Serrano, Asghar Ramezanian, Daniel ValeroAbstract:The aim of this work was to study the composition of aroma volatile compounds (AVCs) of blood orange cv. Moro treated with γ-aminobutyric acid (GABA), methyl jasmonate (MeJA) or methyl salicylate (MeSA) by headspace gas chromatography-mass spectrometry (HS-GC-MS). GABA at 20 and 40 mM was vacuum infiltrated (at 30 kPa for 8 min), and MeJA or MeSA at 50 and 100 μM (vapour Treatments) was applied separately at 20 °C for 18 h. AVCs were measured at harvest and at the end of the experiment (150 days at 3 °C + 2 days at 20 °C, shelf life) for all control and treated fruits. The most abundant compound was limonene, followed by β-myrcene and α-pinene. α-Thujene, camphene, β-pinene, n-decane, α-phellandrene, α-terpinene, p -cymene, (E)-β-ocimene, citronellyl acetate and γ-terpinene were affected by Treatments after long-term cold storage. The highest and the lowest percentages of limonene were measured in control samples (94.31 ± 1) and fruits treated with 100 μM MeSA (86.68 ± 1), respectively. (E)-Caryophyllene and (E)-ethyl cinnamate were not detected in all samples after 150 days of cold storage. The multivariate statistical analysis revealed that β-myrcene, n-decane, linalool, limonene, trans-limonene oxide, ethyl hexanoate and sabinene were positively correlated with chilling injury. Overall, it can be concluded that these compounds can be used as biological markers related to CI based on the multivariate statistical analyses.
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prestorage oxalic acid Treatment maintained visual quality bioactive compounds and antioxidant potential of pomegranate after long term storage at 2 c
Journal of Agricultural and Food Chemistry, 2010Co-Authors: Mohammad Sayyari, Daniel Valero, Mesbah Babalar, Siamak Kalantari, P J Zapata, Maria SerranoAbstract:Oxalic acid at three concentrations (2, 4, and 6 mM) was applied by dipping to pomegranate fruits of cv. Mollar de Elche, which were then stored for 84 days at 2 °C. Pomegranate is a chilling-sensitive fruit and, thus, control fruits exhibited chilling injury (CI) symptoms after long-term storage at 2 °C that were accompanied by increased respiration rate, weight loss, and electrolyte leakage (EL). The CI symptoms were significantly reduced by oxalic acid Treatment, especially for the 6 mM concentration. In addition, control pomegranates showed significant reduction in the content of total phenolics and ascorbic acid as well as in total antioxidant activity (TAA), in both hydrophilic (H-TAA) and lipophilic (L-TAA) fractions. The application of oxalic acid led to lower losses of total phenolics and significant increase in both ascorbic acid content and H-TAA, whereas L-TAA remained unaffected. Thus, oxalic acid could be a promising Postharvest Treatment to alleviate CI and increase antioxidant potential.
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Postharvest sweet cherry quality and safety maintenance by aloe vera Treatment a new edible coating
Postharvest Biology and Technology, 2006Co-Authors: D Martinezromero, Nuria Alburquerque, J M Valverde, Fabian Guillen, S Castillo, Daniel Valero, Maria SerranoAbstract:A novel edible coating based on Aloe vera gel, accordingly to our developed patent (SP Patent Filed P200302937), has been used as Postharvest Treatment to maintain sweet cherry quality and safety. During cold storage, uncoated fruit showed increases in respiration rate, rapid weight loss and colour changes, accelerated softening and ripening, stem browning and increased microbial populations, these processes being more intense during the shelf life periods. On the contrary, sweet cherry treated with A. vera gel significantly delayed the above parameters related to Postharvest quality losses, and storability could be extended. The sensory analyses revealed beneficial effects in terms of delaying stem browning and dehydration, maintenance of fruit visual aspect without any detrimental effect on taste, aroma or flavours. As far as we aware, this is the first time A. vera gel is used as an edible coating in fruit, which would be an innovative and interesting means for commercial application and as alternative of the use of Postharvest chemical Treatments.
Cristina L. M. Silva - One of the best experts on this subject based on the ideXlab platform.
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Assessment of Thermosonication as Postharvest Treatment Applied on Whole Tomato Fruits: Optimization and Validation
Foods (Basel Switzerland), 2019Co-Authors: Joaquina Pinheiro, Rui Ganhão, Elsa M. Gonçalves, Cristina L. M. SilvaAbstract:Tomatoes are a popular and rich fruit due to their nutritional and bioactive composition as vitamins, antioxidants, and phenolics contributing to the promotion of consumer health. For this reason, emerging Postharvest technologies need to be evaluated to achieve the maintenance of sensorial and quality-related characteristics, like color and texture, while aiding to fruit decontamination. Optimization of thermosonication as Postharvest Treatments on whole, mature-green tomatoes (cv. “Zinac”) to improve quality (color, texture, total phenolic content, and weight loss) was performed by response surface methodology. Temperature (32–48 °C), Treatment time (13–47 min), and storage period at 10 °C (1–15 days) at constant ultrasound frequency (45 kHz; 80% power level), were the independent variables. In general, thermosonication delayed tomato color changes while achieving total phenolic content increase and good overall quality. Three optimal thermosonication conditions were selected and validated (32 °C-13 min, 35 °C-20 min and 40 °C-30 min). The most suitable thermosonication condition that promoted a longer storage while keeping a high-quality standard was at 40 °C during 30 min. This study demonstrated that thermosonication provides an effective alternative methodology to guarantee tomato quality without significant change during the expected Postharvest period.
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use of uv c Postharvest Treatment for extending fresh whole tomato solanum lycopersicum cv zinac shelf life
Journal of Food Science and Technology-mysore, 2015Co-Authors: Joaquina Pinheiro, Elsa M. Gonçalves, Carla Alegria, Marta Abreu, Cristina L. M. SilvaAbstract:The effect of UV-C Treatments (0.32, 0.97, 2.56, 4.16 and 4.83 kJ.m(-2) at 254 nm) on the physical-chemical properties [colour, texture, total phenolic content (TPC), weight loss (WL)], and mesophylic counts of whole tomato, was evaluated during 15 days at 10 °C. During storage, the Ctr samples acquired faster red colour than all UV-C samples (higher a* and lower °h values). Comparing texture of Ctr and UV-C samples at 15(th) storage day, an increase of 9 and 8 % on firmness of treated samples at low UV-C intensities (0.32 and 0.97 kJ.m(-2), respectively) was observed. At the end of the storage, Ctr samples showed ca. 4 Log10 of mesophylic load, and the samples treated at 0.97 and 4.83 kJ.m(-2) revealed the lowest microbial load (1.9 and 3.2 Log10, respectively). These results indicate that UV-C radiation, at an appropriate dose, combined with low storage temperature (10 °C) are an effective method to preserve the Postharvest life of tomato, without adversely affecting quality parameters.
Shaojin Wang - One of the best experts on this subject based on the ideXlab platform.
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Postharvest Treatment to control codling moth in fresh apples using water assisted radio frequency heating
Postharvest Biology and Technology, 2006Co-Authors: Shaojin Wang, Sohan Birla, Juming Tang, James D HansenAbstract:Apples destined for export to Japan and South Korea are currently disinfested for codling moth, Cydia pomonella L. (Lepidoptera: Tortricidae), using methyl bromide fumigation. Restrictions and limitations imposed on the uses of methyl bromide have increased interest in developing alternative non-chemical quarantine Treatments. It is imperative that the Treatment is effective against codling moth yet maintains the quality of treated apples. The present study explored the application of radio frequency (RF) energy in conjunction with conventional hot water Treatment to develop feasible heat Treatments. Treatment parameters were selected based on minimum time–temperature conditions required for 100% mortality of fifth-instar codling moth and apple quality. The Treatments included preheating of infested or wholesome apples in warm water at 45 ◦ C for 30 min. The preheated apples were then heated to 48 ◦ C in a hydraulic fruit mover placed between two parallel plate electrodes in a 12 kW, 27.12 MHz pilot scale RF system. RF treated apples were transferred to a 48 ◦ C hot water bath and held for 5, 10, 15 and 20 min before being hydro-cooled in ice water for 30 min. The mortality of codling moths in the infested apples was assessed, and the quality of wholesome apples was evaluated by measuring weight loss, firmness, color, soluble solids content, and titratable acidity after 0, 7, and 30 days of storage at 4 ◦ C. The results showed that the Treatment at 48 ◦ C for 15 min was the most practical and effective both for insect control and apple quality.
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development of a saline water immersion technique with rf energy as a Postharvest Treatment against codling moth in cherries
Postharvest Biology and Technology, 2002Co-Authors: J N Ikediala, James D Hansen, Juming Tang, S R Drake, Shaojin WangAbstract:‘Sweetheart’ sweet cherries (Prunus aium L.) immersed in 0.15% saline water were treated with radio frequency (RF) energy. The dielectric and ionic conductivity properties of the immersion water and that of fruit were matched to obtain a relatively uniform temperature distribution within and among fruits during RF heating. With immersion in saline water of 0.15% NaCl, the mean temperature of the water and that of the cherries differed by 0.6 °C, while the maximum temperature variation within and among fruits determined within 1 min after RF Treatment completion was 1.0 °C of the set temperatures of 48 and 50 °C. The saline water immersion technique helped overcome the markedly high temperature differential problem within and among fruits, normally associated with Treatments in air (without immersion) during RF heating. More than 99% mortality of the 200–400 codling moth larvae or 589–624 eggs was obtained at 50 °C when treated for between 7 and 10 min (heating 2–5 min and holding 5 min). Most quality parameters analyzed were better, or are comparable with methyl bromide fumigated fruit. Saline–water-immersion Treatment in RF may be used to overcome the problem of slow conventional hot air or water heating, as well as the non-uniformity of temperature associated with electromagnetic heating in air, for developing alternative quarantine Treatment for fruits. © 2002 Elsevier Science B.V. All rights reserved.
Gianfranco Romanazzi - One of the best experts on this subject based on the ideXlab platform.
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pre and Postharvest Treatment with alternatives to synthetic fungicides to control Postharvest decay of sweet cherry
Postharvest Biology and Technology, 2013Co-Authors: Erica Feliziani, Lucia Landi, Marilla Santini, Gianfranco RomanazziAbstract:Abstract The effectiveness of alternatives to synthetic fungicides for the control of pathogens causing Postharvest diseases of sweet cherry was tested in vitro and in vivo . When amended to potato dextrose-agar, oligosaccharides, benzothiadiazole, chitosan, calcium plus organic acids, and nettle macerate reduced the growth of Monilinia laxa , Botrytis cinerea and Rhizopus stolonifer . Treatment of sweet cherries three days before harvest or soon after harvest with oligosaccharides, benzothiadiazole, chitosan, calcium plus organic acids, nettle extract, fir extract, laminarin, or potassium bicarbonate reduced brown rot, gray mold, Rhizopus rot, Alternaria rot, blue mold and green rot of cherries kept 10 d at 20 ± 1 °C, or 14 d at 0.5 ± 1 °C and then exposed to 7 d of shelf-life at 20 ± 1 °C. Among these resistance inducers, when applied either preharvest or Postharvest, chitosan was one of the most effective in reducing storage decay of sweet cherry, and its antimicrobial activity in vitro and in field trials was comparable to that of the fungicide fenhexamid. Benzothiadiazole was more effective when applied Postharvest than with preharvest spraying. These resistance inducers could represent good options for organic growers and food companies, or they can complement the use of synthetic fungicides in an integrated disease management strategy.
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effectiveness of Postharvest Treatment with chitosan and other resistance inducers in the control of storage decay of strawberry
Postharvest Biology and Technology, 2013Co-Authors: Gianfranco Romanazzi, Erica Feliziani, Marilla Santini, Lucia LandiAbstract:Abstract This study compared the effectiveness of practical grade chitosan when used in solution with acetic, glutamic, formic and hydrochloric acids, and a water-soluble commercial chitosan formulation, in controlling Postharvest diseases of strawberry. The commercial chitosan formulation and other resistance inducers based on benzothiadiazole, oligosaccharides, soybean lecithin, calcium and organic acids, and Abies sibirica and Urtica dioica extracts were also tested. The commercial chitosan formulation was as effective as the practical grade chitosan solutions in the control of gray mold and Rhizopus rot of strawberries immersed in these solutions and kept for 4 days at 20 ± 1 °C. Moreover, the Treatment with commercial and experimental resistance inducers reduced gray mold, Rhizopus rot and blue mold of strawberries stored 7 days at 0 ± 1 °C and then exposed to 3 days shelf-life. The highest disease reduction was obtained with the commercial chitosan formulation, followed by benzothiadiazole, calcium and organic acids. The compounds that provided the best results in Postharvest applications to control storage decay of strawberries, should be tested in further trials through preharvest Treatments, applied at flowering and a few days before harvest.