Effect of reverse osmosis concentration coupled with drying processes on polyphenols and antioxidant activity obtained from Tectona grandis leaf aqueous extracts

Adjé, 2012, Phenolic acid and flavonol water extracts of Delonix regia red flowers, Industrial Crop and Products, 37, 303, 10.1016/j.indcrop.2011.12.008 Apak, 2007, Comparative evaluation of various total antioxidant capacity assays applied to phenolic compounds with the CUPRAC assay, Molecules, 12, 1496, 10.3390/12071496 Aradhana, 2010, A review on Tectona grandis linn: chemistry and medicinal uses (Family: Verbenaceae), Herbal Tech Industry, 6 Chedea, 2011, Composition in polyphenols and stability of the aqueous grape seed extract from the Romanian variety Merlot recas, Journal of Food Biochemistry, 35, 92, 10.1111/j.1745-4514.2010.00368.x Da Silva, 2011, Physicochemical properties, antioxidant activity and stability of spray-dried propolis, Journal of ApiProduct and ApiMedical Science, 3, 94, 10.3896/IBRA.4.03.2.05 Fernandes, 2011, Analysis of phenolic compounds in cork from Quercus suber L. by HPLC-DAD/ESI-MS, Food Chemistry, 125, 1398, 10.1016/j.foodchem.2010.10.016 Ghaisas, 2010, Antidiabetic and nephroprotective effect of Tectona grandis linn in alloxan induced diabetes, ARS Pharmaceutica, 51, 195 Ghareeb, 2013, Radical scavenging potential and cytotoxic activity of phenolic compounds from Tectona grandis Linn, Global Journal of Pharmacology, 7, 486 Johnson, 2011, Identification of the phenolic components of Vernonia amygdalina and Russelia equisetiformis, Journal of Natural Products, 4, 57 Malick, 2008, Recovery and stability of oleuropein and other phenolic compounds during extraction and processing of olive (Olea europaea L.) leaves, Journal of Food, Agriculture and Environment, 6, 8 Manah, 2004, Polyphenols: food sources and bioavailability, American Journal of Clinical Nutrition, 79, 727, 10.1093/ajcn/79.5.727 Meng, 2006, Anthocyanin and flavonoid production from Perilla frutescens: pilot plant scale processing including cross-flow microfiltration and reverse osmosis, Journal of Agricultural and Food Chemistry, 54, 4297, 10.1021/jf0604079 Munin, 2011, Encapsulation of natural polyphenolic compounds: a review, Pharmaceutics, 3, 793, 10.3390/pharmaceutics3040793 Naira, 2010, Isolation of phenolic compounds from the methanolic extract of Tectona grandis, Research Journal of Pharmaceutical, Biological and Chemical Sciences, 1, 221 Naira, 2011, Antimicrobial and anti-oxidant properties of the isolated compounds from the methanolic extract from the leaves of Tectona grandis, Journal of Basic and Clinical Pharmacy, 2, 163 Nayeem, 2010, Comparative phytochemical and pharmacological screening of the methanolic extracts of the frontal and mature leaves of Tectona grandis, International Journal of Pharma and Bio Sciences, 1, 1 Ou, 2001, Development and validation of an improved oxygen radical absorbance capacity assay using fluorescein as the fluorescent probe, Journal of Agricultural and Food Chemistry, 49, 4619, 10.1021/jf010586o Pandey, 2009, Current understanding of dietary polyphenols and their role in health and disease, Current Nutrition and Food Science, 5, 249, 10.2174/157340109790218058 Parveen, 2008, Extraction, structural characterisation and evaluation of hydroxycinnamate esters of orchard grass (Dactylis glomerata) as substrates for polyphenol oxidase, Phytochemistry, 69, 2799, 10.1016/j.phytochem.2008.08.019 Patora, 2002, Flavonoids from lemon balm (Melissa officinalis L., Lamiaceae), Acta Poloniae-Drug Research, 59, 139 Petreska, 2011, Potential bioactive phenolics of Macedonian Sideritis species used for medicinal “Mountain Tea”, Food Chemistry, 125, 13, 10.1016/j.foodchem.2010.08.019 Phaechamud, 2012, Morphology, thermal and antioxidative properties of water extracts from Sonneratia caseolaris (L.) Engl. Prepared with freeze drying and spray drying, Research Journal of Pharmaceutical, Biological and Chemical Sciences, 3, 725 Pooja, 2011, Hypoglycemic activity of methanolic extract of Tectona grandis linn. Root in alloxan induced diabetic rats, Journal of Applied Pharmaceutical Science, 1, 106 Rao, 2011, In-vitro anti-oxidant and free radical scavenging activity of various extracts of Tectona grandis Linn leaves, Journal of Pharmacy Research, 4, 440 Shalini, 2009, Antifungal activity screening and hplc analysis of Crude extract from Tectona grandis, shilajit, Valeriana wallachi, Electronic Journal of Environnemental Agricultural and Food Chemistry, 8, 218 Shukla, 2010, Tectone, a new antihyperglycemic anthraquinone from Tectona grandis leaves, Natural Product Communications, 5, 427, 10.1177/1934578X1000500318 Singh, 2010, Verbascoside isolated from Tectona grandis mediates gastric protection in rats via inhibiting proton pump activity, Fitoterapia, 81, 755, 10.1016/j.fitote.2010.03.019 Singleton, 1965, Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid reagents, American Journal of Enology and Viticulture, 16, 144, 10.5344/ajev.1965.16.3.144 Stalmach, 2009, Metabolite profiling of hydroxycinnamate derivatives in plasma and urine after the ingestion of coffee by humans: identification of biomarkers of coffee consumption, Drug Metabolism and Disposition, 37, 1749, 10.1124/dmd.109.028019 Tra Bi, 2008, Études de quelques plantes thérapeutiques utilisées dans le traitement de l’hypertension artérielle et du diabète: deux maladies émergentes en Côte d’Ivoire, Sciences & Nature, 5, 39, 10.4314/scinat.v5i1.42150 Vertuani, 2011, Activity and stability studies of verbascoside, a novel antioxidant, in demo-cosmetic and pharmaceutical topical formulations, Molecules, 16, 7068, 10.3390/molecules16087068 Wood, 2002, Antioxidant activity of procyanidin-containing plant extracts at different pHs, Food Chemistry, 77, 155, 10.1016/S0308-8146(01)00329-6 Zimmermann, 2011, Rapid uhplc determination of polyphenols in aqueous infusions of Salvia officinalis L. (sage tea), Journal of Chromatography B, 879, 2459, 10.1016/j.jchromb.2011.06.038 Zulueta, 2009, Orac and teac assays comparison to measure the antioxidant capacity of food products, Food Chemistry, 114, 310, 10.1016/j.foodchem.2008.09.033