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| Stracke, Berenike A.; Rüfer, Corinna E.; Weibel, Franco; Bub, Achim; Watzl, Bernhard. |
| The present study was performed to evaluate the polyphenol content and antioxidant capacity of apples (cv. `Golden Delicious') grown under defined organic and conventional conditions. Apples were harvested at five comparable commercial farms over the course of three years (2004−2006). In 2005 and 2006 the antioxidant capacity was 15% higher (p < 0.05) in organically produced apples than in conventionally produced fruits. In 2005 significantly higher polyphenol concentrations were found in the organically grown apples. In 2004 and 2006 no significant differences were observed (2004, 304 ± 68 μg/g organic vs 284 ± 69 μg/g conventional, p = 0.18; 2005, 302 ± 58 μg/g organic vs 253 ± 41 μg/g conventional, p = 0.002; 2006, 402 ± 100 μg/g organic vs 365 ± 58... |
| Tipo: Journal paper |
Palavras-chave: Fruit and berries. |
| Ano: 2009 |
URL: http://orgprints.org/17949/1/stracke%2Detal%2D2009%2Dagric%2Dfood%2Dchem.pdf |
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| Briviba, Karlis; Stracke, Berenicke A.; Rüfer, Corinna E.; Watzl, Bernhard; Weibel, Franco P.; Bub, Achim. |
| The present study was performed to compare the effects on antioxidant activity and on DNA damage of organic and conventionally produced apples grown under controlled conditions in human peripheral blood lymphocytes. Six healthy volunteers consumed either organically or conventionally grown apples (Golden Delicious, 1000 g) from two neighboring commercial farms in a double-blinded, randomized, cross-over study. The average content of total identified and quantified polyphenols in the organically and conventionally produced apples was 308 and 321 µg/g fresh weight, respectively. No statistically significant differences in the sum of phenolic compounds or in either of the polyphenol classes were found between the agricultural methods. Consumption of neither... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Fruit and berries. |
| Ano: 2007 |
URL: http://orgprints.org/13339/1/briviba%2Detal%2D2007%2DJAFC%2DApples.pdf |
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| Stracke, Berenike A.; Eitel, Joachim; Watzl, Bernhard; Mäder, Paul; Rüfer, Corinna E.. |
| The present study was performed to evaluate the concentrations of phytochemicals (carotenoids and phenolic acids) in wheat varieties grown under comparable organic and conventional conditions over three years as part of a long-term field trial. Phenolic acids of the hydroxybenzoic acid and hydroxycinnamic acid group were quantified by HPLC-DAD after extraction as free, soluble conjugated, and bound forms. Furthermore, the carotenoids lutein and zeaxanthin were determined by HPLC-DAD. There were no statistically significant differences between the two farming systems (sum of carotenoids (microg/g) for 2003, 0.91 +/- 0.55 organic vs 0.96 +/- 0.34 conventional; for 2005, 1.61 +/- 0.22 organic vs 1.33 +/- 0.19 conventional; for 2006, 0.87 +/- 0.33 organic vs... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Soil. |
| Ano: 2009 |
URL: http://orgprints.org/26386/1/Stracke_etal_2009_JAFC57.pdf |
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| Jensen, Maja M.; Jørgensen, Henry; Halekoh, Ulrich; Watzl, Bernhard; Thorup-Kristensen, Kristian; Lauridsen, Charlotte. |
| BACKGROUND: Organic food is perceived as being of better quality and healthier than conventional foods although the scientific research on organic foodstuffs is highly contradictory. The aim of the present study was to investigate if an intake of carrots from four different cultivation systems grown in two consecutive years would influence various biomarkers of health in a rat model. All rats were fed a diet with 40% carrot content. The carrots were grown under conventional (C), “minimalistic” organic (O1), organic (O2), or “very” organic cultivation systems (O3). A control group (CO) being fed standard rat chow was included. RESULTS: The plasma α-tocopherol concentration was higher in the O2 carrot-based diet than in the C carrot based-diet in one year,... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Food security; Food quality and human health. |
| Ano: 2012 |
URL: http://orgprints.org/19732/10/19732.pdf |
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