The extraction of TPC was performed according to the method
used by Dhaouadi et al. [14]. Samples of 1 ml of plasma or 1 g of
dried fecal matter were mixed with 3 ml of water, vigorously vortexes
and sonicated for 20 min. Then, 7 ml of cold acetone (20 C)
was added to the mixture. After centrifugation 10,000 g for
15 min, the residue was re-extracted twice with 5 ml of acetone
(20 C). The supernatants were collected, pooled and concentrated
at 60 C using a rotary evaporator and recovered to a final
volume of 3 ml. To prevent oxidation of the polyphenols, extraction
was rapidly achieved and extracts were immediately used or stored
in darkness at 20 C until further use. The TPC was estimated
spectrometrically by the Folin-Ciocalteu assay described by
Singleton et al. [15], using catechol as standard. The profile of
phenolic and caffeine compounds in GTD, BTD, plasma and fecal
matter was analyzed from the extract by RP-HPLC-MS technique
[14].
The extraction of TPC was performed according to the methodused by Dhaouadi et al. [14]. Samples of 1 ml of plasma or 1 g ofdried fecal matter were mixed with 3 ml of water, vigorously vortexesand sonicated for 20 min. Then, 7 ml of cold acetone (20 C)was added to the mixture. After centrifugation 10,000 g for15 min, the residue was re-extracted twice with 5 ml of acetone(20 C). The supernatants were collected, pooled and concentratedat 60 C using a rotary evaporator and recovered to a finalvolume of 3 ml. To prevent oxidation of the polyphenols, extractionwas rapidly achieved and extracts were immediately used or storedin darkness at 20 C until further use. The TPC was estimatedspectrometrically by the Folin-Ciocalteu assay described bySingleton et al. [15], using catechol as standard. The profile ofphenolic and caffeine compounds in GTD, BTD, plasma and fecalmatter was analyzed from the extract by RP-HPLC-MS technique[14].
การแปล กรุณารอสักครู่..