The elucidation of the structure of the red pigments of the black
raspberries. Monger variety, was achieved. The components of the
pigment of the berries were (a) cyanidin-3-glucoside, (b) cyanidin-3,
5-diglucoside, (c) cyanidin-3-diglucoside and (d) cyanidin-3-rhamnoglucosido-
5-glucoside. The elucidation was carried out after isolation,
purification, concentration and chromatographic separation of...
Pelargonidin 3-glucoside (pgd 3-glu), pelargonidin 3-sophoroside (pgd 3-soph),
and pelargonidin 3-sophoroside 5-glucoside acylated with cinnamic and malonic acids
(acyl-pgd 3-soph 5-glu) were extracted from strawberries (Fragaria anannassa cv,
Totem), nasturtium flowers (Tropaeolum majus), and radish peel (Raphanus sativus L.
cv, fuego), respectively. Their stability was studied in natural and model...
Red radish (Raphanus sativus L.) anthocyanins were extracted from liquid
nitrogen powdered epidermal tissue using acetone and chloroform and isolated using
C-18 resin. Chemical structure and conformation of major pigments were elucidated
by 1-D and 2-D NMR, Mass Spectroscopy, HPLC, and spectral analyses. Two novel
di-acylated anthocyanins, pelargonidin 3-0-[2-0-(β-D-glucopyranosyl)-(6-0- trans-p-coumaroyl-...
A method for separation and characterization of individual anthocyanins was
developed. High Performance Liquid Chromatography (HPLC) with a polymer based
reversed-phase column was used to separate the pigments while on-line Photodiode
Array Detection (PDA) was employed to record the UV and Visible spectrum of the
individual peaks. Spectral information obtained...
Size and color are important visual quantity attributes of the fruit of strawberry (Fmgaria x ananassa Duch.). Strawberry cultivars produce fruit of a characteristic size and color, the later being the result of accumulation of particular anthocyanins. This research sought to determine the basis for genotypic differences in fruit size...
Purple tomatoes (Lycopersicon esculemtum) were bred by incorporating
genes that result in anthocyanin production in the skin of fruits. These genes
originally came from related wild species as no naturally occurring genes encoding
fruit anthocyanin expression are known within the cultivated species. By
combining Aft or Abg with atv or...
Frozen blueberries were pilot-plant-processed into juice and concentrate by 2 treatments (heat and SO2), and a control. Qualitative, and quantitative anthocyanin and polyphenolic content were monitored after each processing step. Major losses occurred after the initial processing steps. Juice processing by-product contained a substantial amount of anthocyanins and polyphenolics (>42%...
Chipping varieties and model systems were used to determine the role of potato
constituents on chip color. Composition was evaluated by HPLC and chip color
measured using a ColorQuest colorimeter. Reducing sugar (RS) content did not
completely explain color quality when present in low concentrations (<60 mg/lOOg).
Levels of ascorbic...
The purpose of this research was to develop tools and germplasm for the production of tomatoes (Solanum lycopersicum L.) with high fruit phenolics without the use of genetic engineering. A candidate gene analysis was undertaken to identify genes regulating anthocyanin biosynthesis in tomato fruit (Aft, Abg, atv, and Purple Smudge)....
