Zawartość związków antyoksydacyjnych w wybranych odmianach cebuli z produkcji ekologicznej i konwencjonalnej (original) (raw)
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Właściwości antyoksydacyjne wybranych odmian owsa siewnego
Zywnosc.Nauka.Technologia.Jakosc/Food.Science.Technology.Quality, 2010
Celem przeprowadzonych badań była ocena właściwości antyoksydacyjnych pełnego ziarna owsa, plewki, bielma i otrąb. Materiałem badawczym było ziarno owsa siewnego następujących odmian: Akt, Arab, Bohun, Celer, Cwał, Deresz, Flamingsprofi, Furman, Jawor, Kasztan, Krezus, Polar oraz Rajtar. W badanych frakcjach młynarskich oznaczono sumę polifenoli metodą Folina-Ciocalteau'a. Wykonano także oznaczenie zdolności eliminowania wolnego rodnika ABTS•. Największą zawartość polifenoli oznaczono w plewce badanych odmian owsa. Mniejsze ilości stwierdzono odpowiednio w otrębach, pełnym ziarnie i bielmie. Łączy się to w istotny sposób ze zdolnością wygaszania wolnego rodnika ABTS• przez poszczególne frakcje młynarskie badanego materiału. Słowa kluczowe: owies, polifenole, właściwości antyoksydacyjne Wprowadzenie Liczne badania naukowe i epidemiologiczne wykazały, że czynniki żywieniowe odgrywają istotną rolę w zapobieganiu zmianom powodowanym przez działanie reaktywnych form tlenu (RFT) na organizm człowieka [6]. Bogatym źródłem przeciwutleniaczy są przede wszystkim warzywa i owoce. Jednakże znaczące ilości tych składników znajdują się w ciągle mało docenianych zbożach. Najliczniejszą grupę przeciwutleniaczy znajdujących się w produktach zbożowych stanowią polifenole, a wśród nich kwasy fenolowe [7, 9, 10]. Celem niniejszych badań było określenie zawartości polifenoli oraz aktywności antyoksydacyjnej w pełnym ziarnie owsa i plewce oraz we frakcjach młynarskich: bielmie i otrębach wybranych odmian owsa siewnego.
Journal of Research and Applications in Agricultural Engineering, 2010
The purpose of this work was to compare the influence of methods applied in organic and conventional agriculture to find antioxidant substances biologically active in spice plants. The research material consisted of following species of spice plants: lemon balm, lovage, mint, thyme and sage. The plants were cultivated in organic and conventional farms. As a result of the research it was concluded that spice plants from organic production in comparison with spice plants from conventional production contained significantly higher level of dry matter, vitamin C, total phenolic acids and total flavonols. Because of the high content of important bioactive compounds, spices from organic farming should be recommended to improve our diet and for prophylaxis of health.
Zywnosc.Nauka.Technologia.Jakosc/Food.Science.Technology.Quality, 2015
S t r e s z c z e n i e Ziele roślin zbożowych, w tym szczególnie owsa, uznawane jest za potencjalny składnik suplementów diety. Celem pracy było określenie podstawowego składu chemicznego oraz zawartości związków polifenolowych w zielu trzynastu genotypów owsa. Z przeprowadzonych badań wynika, że ziele badanych genotypów owsa nie było zróżnicowane pod względem zawartości suchej masy i tłuszczu. Zakresy zmienności wynosiły odpowiednio [%]: 93,1 ÷ 96,6 i 2,15 ÷ 3,55. Wykazano natomiast zróżnicowanie pod względem zawartości białka w zielu różnych genotypów oraz potwierdzono to statystycznie w przypadku form: tradycyjnej-21,1 % i nagoziarnistej-23,1%. Zawartość polifenoli ogółem w suchej masie ziela owsa różniła się statystycznie istotnie, ale nie miało to odzwierciedlenia w zróżnicowaniu aktywności przeciwrodnikowej, która wahała się w zakresie 52,80 ÷ 67,65 % RSA (Radical Scavenging Activity). Największą zawartością polifenoli ogółem w suchej masie ziela cechowała się odmiana 'Kasztan' (85,40 mg/100 g s.m.), a najmniejszą-ród MHR-PO-0512 (72,85 mg/100 g s.m. w przeliczeniu na kwas chlorogenowy). Potwierdzono również wzrost zawartości polifenoli ogółem w suchej masie ziela wraz ze wzrostem zawartości suchej masy. Słowa kluczowe: ziele owsa, skład chemiczny, aktywność przeciwrodnikowa Wprowadzenie Ważną grupą surowców w gospodarce żywnościowej są rośliny zbożowe, w tym owies. Wysoką wartość odżywczą ziarna tego gatunku potwierdzono w wielu opracowaniach [3, 6, 9, 12, 15, 24]. Ważnym składnikiem ziarna są polifenole, będące wtór
Journal of Research and Applications in Agricultural Engineering, 2010
Coffee is very important ingredient of daily menu of the most consumers in Poland and world. Coffee's components are refreshing and stimulating for human organism, moreover containing the range of phenolic substances they are healthful. The aim of work was to compare the content of bioactive compounds as phenolic acids and flavonoides in the coffees from the organic and conventional production. The results show that in the instant coffees the differences between organic vs conventional production system are much higher than in the ground coffees. Organic instant coffees contained significantly more caffeine, chlorogenic acid, epigallocatechin gallate, rutin, D-glycoside of quercetin, myricetin, and naringin than conventional instant coffees. Conventional instant coffees contained significantly more flavon-3-ols and caffeic acid than organic instant coffees. Organic ground coffees contained significantly more dry matter and significantly less rutin and Dglycoside of quercetin than conventional ground coffees. Instant coffees contained significantly and much more almost all of the analyzed substances than ground coffees except rutin that was significantly more abundant in ground coffees. The reason for such big differences is probably completely different production procedure of the instant coffees. The studies on the content of the bioactive compounds in the coffees from organic vs conventional production should be continued in view of total lack of such scientific data and high importance of coffee in the everyday consumption.
Roczniki Państwowego Zakładu Higieny, 2009
Korzenie marchwi są dobrym źródłem błonnika, kwasów fenolowych oraz karotenoidów, z których najliczniej występują beta-karoten oraz luteina. Dlatego marchew jest tak ważna w promocji zdrowia. Istnieją podstawy naukowe pozwalające przypuszczać, że warzywa z produkcji ekologicznej oraz wykonane z nich przetwory zawierają więcej składników odżywczych. Jednakże wyniki badań są zmienne. Dlatego uznano za celowe podjęcie prezentowanych badań. Celem pracy była ocena zawartości związków bioaktywnych w korzeniach marchwi uprawianej w systemie ekologicznym oraz konwencjonalnym. Do doświadczenia wybrano dwie odmiany marchwi: Flacoro i Perfekcja, pochodzące z produkcji ekologicznej i konwencjonalnej. Próbki korzeni marchwi zostały zebrane w tym samym czasie we wszystkich gospodarstwach i przekazane do wykonania badań. Wyniki analiz wskazują, że marchew uprawiana w systemie ekologicznym zawierała istotnie więcej suchej masy, witaminy C, kwasów fenolowych oraz karotenoidów w porównaniu do marchwi konwencjonalnej.
Journal of Research and Applications in Agricultural Engineering, 2008
The primary rules of the organic agriculture are plants production without mineral fertilizers and pesticides. Widely used are natural fertilizers as manure, compost also green manure. For plant protection are used natural insect predators and plants extracts. The sweet red pepper is a good source of vitamin C, flavonoids especially rutin also carotenoids: capsorubin, capsantin, beta-carotene and lutein. Their poignancy red pepper fruits owe alkaloid-capsaicine. A lot of experiments affirmed that fruit and vegetable from organic production contained more antioxidant compounds as flavonols, carotenoids also vitamin C. Because organic vegetables contained more of these compounds in comparison to conventional one, therefore it could be suspect that pickled vegetables, nevertheless processing will contain more antioxidant compounds. A very important aspect it seemed the fact of analysis the way of bioactive compounds changes in pickled red pepper in comparison to fresh one. For experiment were use two cultivar of sweet red pepper (O arowska and Roberta) from organic and conventional cultivation. The chemical analysis of dry matter, witamin C, flavonols and carotenoids were carried out. The next step of analysis was processing (make of pickled red pepper). After four month sensory and chemical analysis were carried out. The obtained results of fresh red pepper showed that organic fruits contained more vitamin C, rutin, lutein also dry matter. Conventional pepper contained more beta-carotene and lycopene. The pickled organic red pepper contained more vitamin C and lutein in comparison to conventional one. After pickling process the loss of vitamin C, lycopene, betacarotene and dry matter were observed in fruits from both cultivation systems. The sensory analysis show that organic pickled red pepper has a higher notes of spices and pepper odour also acetic, spices, sweet and pepper flavour. Organic pickled red pepper has also the significantly higher the total quality of fruits. Additionally has been observed the strong correlation between pungent flavour and flavonols content, the total quality and sugar to acids ratio for organic pickled red pepper also the total quality and dry matter content for conventional one.
Zawartość związków bioaktywnych w nowych sokach owocowych z produkcji ekologicznej
Journal of Research and Applications in Agricultural Engineering, 2013
Organic products are recognized by consumers as safer (e.g. free from pesticide residues) as well as richer compounds important for human health. The fruit juices are one of the best source of bioactive compounds like polyphenols (phenolic acids, flavonoids and anthocyanins), as well as vitamins (especially vitamin C). In the experiment four types of fruit juices were tested: chokeberry juice, apple-chokeberry juice, clear apple juice and clear apple juice with addition of green tea extract. The dry matter content of the juices was measured and moreover the content of vitamin C and polyphenols were measured by HPLC method. The obtained results show that apple juice with addition of green tea extract in comparison to the other analyzed fruit juices contained significantly more dry matter, total flavonoids and individual phenolic acids as: gallic and caffeic as well as luteolin,. The chokeberry juice in comparison to the other tested juices contained significantly more vitamin C, total anthocyanins and all of the individual anthocyanins, total phenolic acids as well as the individual phenolic acids: p-coumaric, ferulic, cinaminic, myrycetin and apigenin. Whereas clear apple juice contained significantly more chlorogenic acid and quercetin than other tested fruit juices.
Journal of Research and Applications in Agricultural Engineering, 2013
The freezing of tomato could be a good method for tomato processing as well as using it as fresh fruit in time when tomato lacks on the market. In the present literature there is no information about freezing process of organic tomato. The aim of the work was to measure the influence of the farm management, kind of package and tomato cultivar on bioactive compounds content in frozen tomato fruits. For experiment three standard tomatoes (Mercury, Akord and Rumba) and two cherry tomatoes (Conchita and Picolino) were used. The fruits were obtained from two organic (certificated) and two neighboring production farms. After harvest tomato fruits were selected, washed and frozen. Two different kinds of package were used: plastic bags and vacuum bags. After six month of freezing tomato fruits were freeze-dried and chemical analysis was made. The content of dry matter (before freeze-drying), total and reducing sugars, acidity, vitamin C, carotenoids and polyphenols were measured. The obtained results showed that organic tomato contained significantly more dry matter, organic acids, vitamin C, gallic, chlorogenic acids, total flavonoids, myrycetin, kaempferol, and apigenin compared to conventional frozen tomato. The conventional frozen tomato contained significantly more total and reducing sugars as well as quercetin compared to organic ones. The vacuum packed tomato contained significantly more organic acids, vitamin C and quercetin compared to tomato packed in plastic bags. The fruits packed in normal, plastic bags (not-vacuum) contained significantly more dry matter, total and reducing sugars, lycopene, phenolic acids and flavonoids (without quercetin). Among the examined cultivars cherry fruit Conchita cv. had the best nutritive value after freezing and among standard tomato-Rumba cv
Journal of Research and Applications in Agricultural Engineering, 2007
There is growing interest for organic farming in Europe and other parts of the world. Consumers are constantly looking for the safe foods rich in the numerous beneficial substances, foods with the controlled quality. There are scientific foundations allowing to assume that vegetables and fruits from the organic production can contain more beneficial substances (such as polyphenols and vitamin C) than plant crops from the conventional production. Few research studies seem to confirm this hypothesis but still the knowledge in this respect is insufficient. Therefore it was found useful to conduct the presented studies comparing the content of bioactive compounds in the tomato fruits cultivated in the organic vs. conventional way. The research study has comprised the standard cultivars Rumba, Kmicic and Gigant and cherry-tomato cultivar Koralik. The results obtained have shown that organic tomatoes contained more total and reducing sugars and more organic acids. Moreover in the organic fruits significantly more bioactive compounds such as vitamin C, betacarotene, flavonols and phenolic acids have been found. Only the content of lycopene was higher in the conventional fruits.