Sirvi Autor "Venskutonis, Petras Rimantas" järgi
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Kirje Antioxidants Characterization of the Fruit, Juice, and Pomace of Sweet Rowanberry (Sorbus aucuparia L.) Cultivated in Estonia(MDPI, 2021) Sarv, Viive; Venskutonis, Petras Rimantas; Rätsep, Reelika; Aluvee, Alar; Kazernavičiūtė, Rita; Bhat, Rajeev; Polli Horticultural Research Centre, Institute of Agricultural and Environmental Sciences. Estonian University of Life Sciences; ERA Chair for Food (By-) Products Valorisation Technologies (VALORTECH). Estonian University of Life SciencesThis study aimed to identify promising candidates of rowanberry cultivars for a wider cultivation and utilization. Antioxidant properties and phenolic content were evaluated for fruit, juice, and pomace samples of 16 different sweet rowanberry cultivars (cvs) and wild rowanberry (S. aucuparia L.), while the antioxidant potential was assessed using three different methods, based on the capacity to scavenge ABTS + and DPPH and measure the oxygen radical absorbance capacity (ORAC). In general, the radical scavenging capacity was higher for hybrid cultivars, e.g., for cvs Likernaja, Burka, Granatnaja, and Rubinovaja in all assays. The highest value in the ABTS + assay was determined for the fruit sample Likernaja, and in DPPH assay in the pomace sample of cv. Likernaja, at 527.55 and 1068.28 M TE/g dw, respectively. The highest ORAC value was found in the fruit sample of Burka (456.53 M TE/g dw). Among the Nevezhino rowans, the highest radical scavenging values of all fractions were determined in cv. Solnechnaja. Regarding the total phenolic content (TPC), higher values were obtained in the whole fruits than in separated fractions, juice, and pomace. The tested hybrids had higher TPC values, either in fruit and pomace or in juice extracts, than those in the other analyzed S. aucuparia L. cultivars. While the fruit and juice samples showed higher anthocyanin (ACY) values, the pomace samples had higher hydroxycinnamic acid (HCA) contents on average. The results revealed that the different fractions of selected rowanberry cultivars can be a promising source of antioxidants and polyphenols for further potential applications. It is envisaged that the results of this study will serve in valorizing sweet rowanberry cultivars as value-added functional ingredients for food and non-food applications.Kirje Application of Raw and Defatted by Supercritical CO₂ Hemp Seed Press-Cake and Sweet Grass Antioxidant Extract in Pork Burger Patties(MDPI, 2021) Kerner, Kristi; Jõudu, Ivi; Tänavots, Alo; Venskutonis, Petras Rimantas; Chair of Food Science and Technology, Institute of Veterinary Medicine and Animal Sciences. Estonian University of Life Sciences; ERA Chair for Food (By-) Products Valorisation Technologies (VALORTECH). Estonian University of Life Sciences; Chair of Animal Breeding and Biotechnology, Institute of Veterinary Medicine and Animal Sciences. Estonian University of Life SciencesThere is an increasing tendency toward the application of plant origin ingredients in meat products. This study evaluates the physicochemical properties and oxidative stability of pork burger patties produced with the addition of dried raw and defatted by supercritical CO2 extraction hemp seed press-cake as protein-rich ingredients (1.5–2.0%) and sweet grass ethanolic extract (0.5%) as a strong natural antioxidant. The main aim of using such a combination was to assess the possibility of mitigating the negative effects of hemp seed press-cake, containing approx. 10% of highly unsaturated oil, on the oxidation of meat products. The patties were compared with the control sample (without additives) during storage on days 0, 4, 8, 15, and 21 at 4 °C in modified atmosphere conditions. Plant ingredients reduced the lightness of pork patties, while their effects on other physicochemical characteristics were insignificant. The patties with fully defatted hemp seed flour showed the lowest grilling losses. Based on the measurement of thiobarbituric acid reactive substances, raw hemp seed press-cake increased the oxidative rate of pork patties; however, remarkably, the addition of sweet grass extract completely inhibited oxidation during the whole period of storage. The sensory characteristics of the products were acceptable; however, the patties with sweet grass extract received lower evaluation scores.Kirje Evaluation of different blackcurrant seed ingredients in meatballs by using conventional quality assessment and untargeted metabolomics(Elsevier, 2023) Kerner, Kristi; Kazernavičiūtė, Rita; Jõudu, Ivi; Rocchetti, Gabriele; Lucini, Luigi; Tänavots, Alo; Hussain, Shehzad; Venskutonis, Petras RimantasBlackcurrants are sources of phenolic compounds, such as anthocyanins, possessing strong antioxidant, anti- microbial and antifungal activity. Therefore, the addition of different blackcurrant pomace ingredients may affect the overall meat quality. The actual chemical profile and bioactivities of blackcurrant pomace ingredients may strongly depend on its preparation; for instance, in our study the highest values of the in vitro antioxidant capacity were determined for blackcurrant seeds after supercritical CO2 extraction. Starting from these back- ground conditions, in this work, we evaluated the ability of three different concentrations (namely 1, 3, and 5% w/w) of blackcurrant (BC) seeds following EtOH/water extraction (BC-AE), before supercritical fluid CO2 extraction (BC-RS), and after supercritical fluid CO2 extraction (BC-ASC) to affect different quality parameters of pork meatballs. These latter were stored considering three different time-points, namely 1, 3 and 6 days at 4 ◦C packed under modified atmosphere (i.e., 70% N2 and 30% CO2). Untargeted metabolomics allowed to identify several lipid and protein-related oxidation products involved in redox reactions, such as 13-L-hydroperoxylino- leic acid, (12S,13S)-epoxylinolenic acid, 9,10-epoxyoctadecenoic acid, glutathione, glutathione disulfide, L- carnosine, L-ascorbic acid, and tocotrienols. Besides, multivariate statistics applied on the metabolomics dataset confirmed that the chemical profile of meatballs was an exclusive combination of both BC inclusion levels and type of BC-ingredients considered. Our findings showed that the higher the concentration of BC seed ingredients in meatballs, the lower the cooking loss and the higher the fibre content. Also, all the ingredients significantly affected the colour parameters.Kirje Evaluation of different blackcurrant seed ingredients in meatballs by using conventional quality assessment and untargeted metabolomics : [data](Estonian University of Life Sciences, 2023) Kerner, Kristi; Kazernavičiūtė, Rita; Jõudu, Ivi; Rocchetti, Gabriele; Lucini, Luigi; Tänavots, Alo; Hussain, Shehzad; Venskutonis, Petras RimantasBlackcurrants are sources of phenolic compounds, such as anthocyanins, possessing strong antioxidant, anti- microbial and antifungal activity. Therefore, the addition of different blackcurrant pomace ingredients may affect the overall meat quality. The actual chemical profile and bioactivities of blackcurrant pomace ingredients may strongly depend on its preparation; for instance, in our study the highest values of the in vitro antioxidant capacity were determined for blackcurrant seeds after supercritical CO2 extraction. Starting from these back- ground conditions, in this work, we evaluated the ability of three different concentrations (namely 1, 3, and 5% w/w) of blackcurrant (BC) seeds following EtOH/water extraction (BC-AE), before supercritical fluid CO2 extraction (BC-RS), and after supercritical fluid CO2 extraction (BC-ASC) to affect different quality parameters of pork meatballs. These latter were stored considering three different time-points, namely 1, 3 and 6 days at 4 ◦C packed under modified atmosphere (i.e., 70% N2 and 30% CO2). Untargeted metabolomics allowed to identify several lipid and protein-related oxidation products involved in redox reactions, such as 13-L-hydroperoxylino- leic acid, (12S,13S)-epoxylinolenic acid, 9,10-epoxyoctadecenoic acid, glutathione, glutathione disulfide, L- carnosine, L-ascorbic acid, and tocotrienols. Besides, multivariate statistics applied on the metabolomics dataset confirmed that the chemical profile of meatballs was an exclusive combination of both BC inclusion levels and type of BC-ingredients considered. Our findings showed that the higher the concentration of BC seed ingredients in meatballs, the lower the cooking loss and the higher the fibre content. Also, all the ingredients significantly affected the colour parameters.Kirje The Sorbus spp.—underutilised plants for foods and nutraceuticals: review on polyphenolic phytochemicals and antioxidant potential(MDPI, 2020) Sarv, Viive; Venskutonis, Petras Rimantas; Bhat, Rajeev; ERA Chair for Food (By-) Products Valorisation Technologies of Estonian University of Life Sciences -VALORTECH. Estonian University of Life Sciences; Institute of Agricultural and Environmental Sciences. Polli Horticultural Research CentreThe Sorbus spp. are valuable plants, which have been used for ornamental purposes, in traditional medicines and less seldom in foods. Recent studies have revealed di erent anatomical parts of the Sorbus spp. to contain valuable phytochemicals demonstrating various bioactivities. However, in terms of applications in the products intended for human consumption, Sorbus still remains as an underutilised genus. The increasing number of studies on phytochemicals, antioxidant potential and other bioactivities of Sorbus extracts has revealed the prospects of expanding its use in natural medicines, cosmetics and as innovative food ingredients, which might find wider applications in functional foods and/or nutraceuticals. Ca eoylquinic acids, flavonoids and proanthocyanidins have been reported in various Sorbus spp. as the most abundant polyphenolic antioxidants. The preparations of various plant anatomical parts have been used in ethnopharmacology as natural remedy for treating bacterial, viral, inflammatory diseases including tumors. Sorbus spp. plant parts have also been tested for management of diabetes, neurological, and cardiovascular disorders. The present review is focused on Sorbus plants (in total 27 Sorbus spp.), their composition and properties in terms of developing promising ingredients for foods, nutraceutical, cosmeceutical and other applications. It is expected that this review will assist in designing further studies of rowans and other Sorbus spp. in order to expand their uses for various human applications.Kirje Ülevaade RESTA14 projekti TAIMLOOMTOIT tulemustest – liha- ja kalatoodetele lisandväärtuse andmine aiandustootmises tekkivate mahlapressjääkidega(Eesti Maaülikool, 2023) Rätsep, Reelika; Roasto, Mati; Anton, Dea; Meremäe, Kadrin; Tepper, Marek; Kaldmäe, Hedi; Bleive, Uko; Kerner, Kristi; Sünter, Alar; Aluvee, Alar; Rusalepp, Linda; Koskar, Julia; Sarv, Viive; Venskutonis, Petras Rimantas; Püssa, TõnuToidu tootmise kõrvalsaaduste väärindamine ja teaduspõhiste tervislike toidutoodete teadus- ja arendustegevus on viimastel aastatel hoogustunud ning ring- ja biomajanduse kontekstis väga oluline. Tarbijate usaldus ja nõudmised seoses teaduspõhiste naturaalsete ja tervislike toidutoodetega pidevalt tõusevad, mistõttu on mõistlik otsida keskkonnasõbralikke ja lisandväärtust loovaid lahendusi, seda nii kohaliku taimse kui ka loomse toidutoorme kui ressursi täielikumaks ärakasutamiseks. Aiandus- ja põllukultuuride kasvatamisel tekib põhitoodete kõrval märkimisväärne kogus (30‒50%) tervisele kasulikke aineid (nt polüfenoole, karotenoide) sisaldavaid taimseid jääke või kõrvalsaadusi (kestad, seemned, pressjäägid jne), mis võiksid leida kasutust loomset päritolu toiduainetele lisandväärtuse andmiseks ja nende kvaliteedi tõstmiseks. Taimse bioaktiivsete ühendite rikka materjali lisamisega on võimalik oluliselt pidurdada mikroorganismide kasvu ning rasvhapete ja kolesterooli oksüdatsiooni liha- ja kalatoodetes, millega pikeneb ka toodete säilivusaeg. Taimsete lisandite funktsionaalsuse ja kasutamise alased uuringud on aktuaalsed üle maailma, kuid siiski on seni jõutud uurida vaid suhteliselt väikest osa nii maailmas kui ka Eestis saadaolevast potentsiaalsest taimsest materjalist. Seetõttu on väga oluline sellealase teadus- ja arendustööga jätkamine, kaasates aktiivselt ka põllumajandus- ja aiandustootjaid, kelle ettevõtetes nimetatud saadusi tekib ning toiduettevõtteid, kus valmivates toodetes on võimalik kõrvalsaadusi ära kasutada. Käesolevaga anname ülevaate RESTA14 programmi teadus- ja arendusprojekti TAIMLOOMTOIT tegevustest ja tulemustest taimsete kõrvalsaaduste väärindamisel liha- ja kalatoodetes. Tegevused viidi läbi EMÜ PKI Polli aiandusuuringute keskuse ning VLI veterinaarse biomeditsiini ja toiduhügieeni ning toiduteaduse ja toiduainete tehnoloogia õppetooli teadlaste vahelises koostöös.Kirje Untargeted metabolomics and conventional quality characterization of rowanberry pomace ingredients in meatballs(Elsevier, 2023) Sarv, Viive; Kerner, Kristi; Venskutonis, Petras Rimantas; Rocchetti, Gabriele; Becchi, Pier Paolo; Lucini, Luigi; Tänavots, Alo; Bhat, RajeevIn this study, a rowanberry pomace defatted with supercritical CO2 (2%-AC), its ethanolic extract (1%-E) and extraction residue (2%-R), were tested in meatball preparation. The meatballs with 1%-E demonstrated the highest in vitro radical scavenging capacity. In the case of 1%-E the pH of meatballs was significantly lower compared to the control sample (P = 0.0132) on the 5-day. The lowest cooking loss was achieved when the meatballs contained mainly fibre-rich 2%-R. The UHPLC method detected 184 metabolites, including strong antioxidants, such as chlorogenic acids, 3′,4′-methylenedioxy-5,7-dimethylepicatechin, hyperin, isoquercitrin. The 1%-E was particularly effective against the development of unpleasant off-flavours caused by carbonyl compounds. Consistently, the decrease in lipid oxidation, indicated by reduced 7-dodecenal and 2,4-heptadienal contents, has been observed following the addition of rowanberry extract to meatballs. Metabolomics coupled with conventional quality evaluations provided a deeper understanding of the potential utilization and valor- isation of different rowanberry pomace extracts as meat ingredients.Kirje Untargeted metabolomics and conventional quality characterization of rowanberry pomace ingredients in meatballs : [data](Estonian University of Life Sciences, 2023) Sarv, Viive; Kerner, Kristi; Venskutonis, Petras Rimantas; Rocchetti, Gabriele; Becchi, Pier Paolo; Lucini, Luigi; Tänavots, Alo; Bhat, RajeevIn this study, a rowanberry pomace defatted with supercritical CO2 (2%-AC), its ethanolic extract (1%-E) and extraction residue (2%-R), were tested in meatball preparation. The meatballs with 1%-E demonstrated the highest in vitro radical scavenging capacity. In the case of 1%-E the pH of meatballs was significantly lower compared to the control sample (P = 0.0132) on the 5-day. The lowest cooking loss was achieved when the meatballs contained mainly fibre-rich 2%-R. The UHPLC method detected 184 metabolites, including strong antioxidants, such as chlorogenic acids, 3′,4′-methylenedioxy-5,7-dimethylepicatechin, hyperin, isoquercitrin. The 1%-E was particularly effective against the development of unpleasant off-flavours caused by carbonyl compounds. Consistently, the decrease in lipid oxidation, indicated by reduced 7-dodecenal and 2,4-heptadienal contents, has been observed following the addition of rowanberry extract to meatballs. Metabolomics coupled with conventional quality evaluations provided a deeper understanding of the potential utilization and valor- isation of different rowanberry pomace extracts as meat ingredients.