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Effect of Quercetin on Bone Mineral Status and Markers of Bone Turnover in Retinoic Acid-Induced Osteoporosis

.S., Chang A.B., Bisphosphonates for osteoporosis in people with cystic fi brosis. Cochrane Database. Syst. Rev., 2012, doi: 10.1002/14651858.CD002010.pub3. 6. Coskun O., Kanter M., Korkmaz A., Oter S., Quercetin, a flavonoid antioxidant, prevents and protects streptozotocin-induced oxidative stress and beta-cell damage in rat pancreas. Pharmacol. Res., 2005, 51, 117-123. 7. Coxam V., Phyto-oestrogens and bone health. Proc. Nutr. Soc., 2008, 67, 184-95. 8. Fahmy S.R., Soliman A.M., Oxidative stress as a risk factor of

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Evaluation of Quercetin Content, Colour and Selected Physico-Chemical Quality Parameters of Croatian Blackberry Wines

interpretation. Conn. Vigne Vin, 1984, 18, 253–271 (in French). 15. Hollman P.C.H., van Trijp J.M.P., Buysman M.N.C.P., van der Gaag M.S., Mengelers M.J.B., de Vries J.H.M., Katan M.B., Relative bioavailability of the antioxidant quercetin from various foods in man. FEBS Let., 1997, 418, 152–156. 16. Huerta M.D., Salinas M.R., Masoud T., Alonso G.L., Wine differentiation according to color using conventional parameters and volatile components. J. Food Comp. Anal., 1998, 11, 363–374. 17. International Conference on Harmonization, ICH harmonized tripartite

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Validation of the Analytical Method for the Determination of Flavonoids in Broccoli

A. 2000. Plant derived phenolic anti-oxidants. Curr. Opin. Lipidol. 11: 43-47. Erlund I. 2004. Review of the flavonoids quercetin, hes-peretin, and naringenin. Dietary sources, bioactivi-ties, bioavailability, and epidemiology. Nutr. Res. 24: 851-874. DOI: 10.1016/j.nutres.2004.07.005. Gliszczyńska-Świgło A., Ciska E., Pawlak-Lemańska K., Chmielewski J., Borkowski T., Tyrakowska B. 2006. Changes in the content of health-promoting com–pounds and antioxidant activity of broccoli after do-mestic processing. Food Addit. Contam. 23(11): 1088-1098. DOI: 10

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Influence of Storage Conditions on Flavonoids Content and Antioxidant Activity of Selected Shallot (Allium Cepa Var. Ascalonicum Backer) Hybrid Cultivars

References Bartoń H., Fołta M., Zachwieja Z. 2005. [Application of FRAP, ABTS and DPPH methods to estimation of antioxidant activity of food products.] Nowiny Lekarskie 74(4): 510-513. [in Polish with English summary] Bartz J.A, Brecht J.K. (ed.). 2003. Postharvest physiology and pathology of vegetables. Marcel Dekker Inc., New York. Beesk N., Perner H., Schwarz D., George E., Kroh L. W., Rohn S. 2010. Distribution of quercetin-3,4-Odiglucoside, quercetin-4-O-monoglucoside, and quercetin in different

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Influence of biostimulants on phenolic content in broccoli heads directly after harvest and after storage

distribution and frost hardiness of vegetating winter wheat plants. Russ. J. Plant Physiol. 55: 308-314. Koh E., Wimalasiri K.M.S., Chassy A.W., Mitchell A.E., 2009. Content of ascorbic acid, quercetin, kaempferol and total phenolics in commercial broccoli. J. Food Compos. Anal. 22: 637-643. Kowalczyk K., Zielony T., Gajewski M., 2008. Effect of Aminoplant and Asahi on yield and quality of lettuce grown on rockwool. In: Biostimulators in Modern Agriculture. Vegetable Crops. Z.T. Dąbrowski (Ed.), Wieś Jutra, Warszawa: 35

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Anticholinesterase Activities Of Selected Polyphenols – A Short Report

.-H., Lee S.-R., Bae J.-H., Baek W.-K., Suh M.-H., Park J., Park C.-W., Suh S.-I., The green tea polyphenol (-)-epigallocatechin gallate attenuates β-amyloid-induced neurotixicity in cultured hippocampal neurons. Life Sci., 2001, 70, 603-614. 7. Duchnowicz P., Broncel M., Podsędek A., Koter-Michalak M., Hypolipidemic and antioxidant effects of hydroxycinnamic acids, quercetin, and cyanidin 3-glucoside in hypercholesterolemic erythrocytes (in vitro study). Eur. J. Nutr., 2012, 51, 435-443. 8. Ellman G.L., Lourtney D. K., Andres V., Gmelin G

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Structure of Asclepias syriaca L. population against phytocenotic and habitat conditions in Widuchowa (West Pomerania)

syriaca L. - an underexploited industrial crop for energy and chemical feedstock. Romanian Biotechnological Letters Supplement 16(6): 131-132. Sikorska M. & Matławska I. 2000. Quercetin and its glycosides in the flowers of Asclepias syriaca L. Acta Poloniae Pharmaceutica 57(4): 321-324. Sikorska M., Matławska I., Głowniak K. & Zgórka G. 2000. Qualitative and quantitative analysis of phenolic acidsin Asclepias syriaca L. Acta Poloniae Pharmaceutica 57(1): 69-72. Sikorska M., Matławska I. & Frański R. 2001. Kaempferol and

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Influence of Pectolytic Enzymes and Selected Yeast Strains on the Chemical Composition of Blackberry Wines

REFERENCES 1. Amidžić Klarić D., Klarić I., Mornar A., Polyphenol content and antioxidant activity of commercial blackberry wines from Croatia: Application of multivariate analysis for geographic origin differentiation. J. Food Nutr. Res., 2011a, 50, 199–209. 2. Amidžić Klarić D, Klarić I., Velić D., Dragojević I.V., Evaluation of mineral and heavy metal contents in Croatian blackberry wines. Czech J. Food Sci., 2011b, 29, 260–267. 3. Amidžić Klarić D., Klarić I., Velić D., Velić N., Marček T., Evaluation of quercetin content, colour and

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Natural Flavonoids as Potential Photosensitizers for Dye-Sensitized Solar Cells

;5:2112-2122. DOI: 10.1016/j.matpr.2017.09.208. [15] Zdyb A, Krawczyk S. Adsorption and electronic states of morin on TiO 2 nanoparticles. Chem Phys. 2014;443:61-66. DOI: 10.1016/j.chemphys.2014.08.009. [16] Zdyb A, Krawczyk S. Characterization of adsorption and electronic excited states of quercetin on titanium dioxide nanoparticles. Spectrochim Acta Part A: Mol Biomol Spectrosc. 2016;157:197-203. DOI: 10.1016/j.saa.2016.01.006. [17] Kamat PV, Bedja I, Hotchandani S. Photoinduced charge transfer between carbon and semiconductor clusters. One-electron reduction

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Flavonols and Flavones in Some Bulgarian Plant Foods

Abstract

Flavonols and flavones are antioxidants of plant origin with a beneficial role in the prevention of different diseases. Therefore it is important for their content in various foods to be measured in order to be able to judge on their potential for disease prevention.

The aim of the study is to present precise and representative data for flavonols and flavones content of Bulgarian foods from Malvaceae and Umbiliferae plant families, based on a validated analytical HPLC procedure.

The content of flavonols and flavones was determined in one representative belonging to Malvaceae plant family used as food - okra, and four representatives of Umbiliferae plant family - dill, parsley, celery, and carrots. An HPLC method for simultaneous determination of flavonols myricetin, quercetin, kaempferol and flavones luteolin and apigenin was applied and validated.

The results showed that dill was particularly rich in the flavonol quercetin (403.0 mg/kg) followed by okra (200.3 mg/kg). The other analysed samples contained only flavones with the highest amount noted for luteolin in celery leaves (228.9 mg/kg) and for apigenin in parsley (747.9 mg/kg). Those data outlined the ranking of green leaf herbs among the greatest sources of flavonols and flavones among Bulgarian foods. They could be used to characterise various biological species and, what is more, they could be successfully applied in practice to formulate preventive antioxidant diets to be administered in case of various contemporary diseases.

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