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Preparation of catechin and procyanidin standards from hawthorn [ Crataegus azarolus L.] and pine [Pinus mesogeensis fieschi] Barks

100%

Oszmianski J., Bourzeix M.

Polish Journal of Food and Nutrition Sciences

1995

tom 04

nr 2

89-96

Pine and hawthorn barks were used to obtain procyanidin standards by a simple method. At first oligomeric procyanidin powder was prepared by a previously patented method yielding 450 mg and 120 mg, respectively, írom 100 g of hawthorn and pine fresh bark. These preparations were then fractionated into monomers, dimers and trimers with Fractogel TSK HW-40 (S) column (28 x 2.5 cm) and methanol as the eluent. The purity of five procyanidin standards was more than 90%. The hawthorn contained (-)epicatechin and its derivative procyanidins as principal phenolics and pine (+)catechin and its procyanidin dimers and trimer.

Drying process affects bioactive compounds in hawthorn species

80%

Saadatian M., Najda A., Jasour M. S.

Acta Scientiarum Polonorum. Hortorum Cultus

2016

tom 15

nr 4

Five different methods of drying (microwave-drying, oven-drying at 50 and 70°C, sun-drying and shade drying) the fresh fruits of two hawthorn species – Crataegus azarolus L. (yellow) and Crataegus orientalis L. (red) – were investigated in this study to determine its impact on their antioxidant capacity and antioxidant content. The results showed that antioxidant capacity increased, and at the same time the number of total phenolic compounds decreased with increase in the temperature in oven drying, whereas in other drying methods (microwave, sun and shade-drying) the amount of total phenolic compounds increased. It was observed that in all samples the vitamin C content decreased. Samples dried in a microwave appeared to have the strongest antioxidant capacity. Microwave-drying appeared to be the best method for preserving bioactive chemicals.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Polish Journal of Food and Nutrition Sciences

1 Bourzeix M.

1 Jasour M. S.

1 Najda A.

1 Oszmianski J.

1 Saadatian M.

1 2016

1 1995

Wyniki wyszukiwania

Preparation of catechin and procyanidin standards from hawthorn [ Crataegus azarolus L.] and pine [Pinus mesogeensis fieschi] Barks

Drying process affects bioactive compounds in hawthorn species