Search Results

HPLC analyses, and Alan G. Smith for advice and the use of his lab space. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely

typical species and four corresponding cultivars, were investigated to analyze their flavonoids by high-performance liquid chromatography coupled with diode array detection (HPLC-DAD) as well as HPLC with electrospray ionization and mass spectrometry (HPLC

objective of our study was to identify and characterize the anthocyanins in herbaceous peony species from different regions of the world using reverse-phase high-performance liquid chromatography (HPLC) with diode array detection in tandem with electrospray

Technology (Athens), vacuum packed, and stored at −80 °C until analyzed. Extraction of phenolic compounds (as lyophilized hydrophilic extracts). Before all analyses [TPC, hydrophilic-oxygen radical absorbing capacity (H-ORAC FL ), and HPLC], a lyophilized

, NY) equipped with a 6-mm diameter sawtooth grinder type of tissue cutter. The solutions were filtered through 0.45-μm nylon-66 filters in preparation for HPLC analysis. High-performance liquid chromatography analysis. Extracts were analyzed once by

plants using ultraviolet-visible spectrophotometry and HPLC. This research will provide information on the presence, color, and number of pigments and polyphenols (colorants) in plant extracts for possible use as hair coloring dyes. Materials and Methods

V. tenellum . By using HPLC and LC-ESI-MS-MS, the objectives of the study were to investigate 1) flavonoid (anthocyanins, flavonols, and proanthocyanidins) and organic acid profiles of different blueberry species, 2) variation of flavonoid and

HPLC analysis of xylem sap collected at the time of bud break. Bud break is defined here as the inner bud scale split of >50% of primary apical buds. Spring xylem sap was collected and analyzed at the same stage of bud break from trees reflecting two

-tocopherol and α, β-, and γ-tocotrienol. Burns et al. (2003) and Koch and Goldman (2005) used reverse-phase HPLC equipped with an ultraviolet detector to quantify vitamin E levels in carrot roots. These studies reported values of 0.03–0.11 µg·g −1 of total α

. Two notable exceptions were ‘Tarheel’ and ‘Noble’, which contained good amounts of malvidin and petunidin and produced wines of acceptable color. Since that early work, several authors have used HPLC to better examine the anthocyanin profile of