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Enzymatic formation and influence of variety, maturity and processing on volatiles of the carrot, Daucus carota L.

Creator:: Heatherbell, D. A. (David A.)
Resource Type:: Dissertation
Full Text:: volatiles were subjected to qualitative and quantitative analysis in a study of carrot flavor (aroma

Influence of processing and storage on the phenolic composition of apple, pear and white grape juice

Creator:: Spanos, George A.
Abstract:: Methodology for characterization of the phenolic profile of apple, pear and grape juice was developed. It utilized High Performance Liquid Chromatography (HPLC) for separation of individual phenolic compounds and Diode Array Detection for recording the Ultra-violet (UV) spectrum of chromatographic peaks. The high resolution achieved and the ability of recording...
Resource Type:: Dissertation
Full Text:: AN ABSTOflCT OF THE THESIS OF George A. Spanos for the degree

Anthocyanin pigment, nonvolatile acid and sugar composition of red raspberry juice

Creator:: Spanos, George A.
Abstract:: Seven red raspberry (Rubus Ideaus L.) samples from Oregon, Washington, British Columbia and New Zealand were processed into juice. These, along with three juice samples supplied from West Germany were analyzed by high performance liquid chromatography, (HPLC), for nonvolatile acid, sugar, anthocyanin and anthocyanidin composition. In order to quantitate the...
Resource Type:: Masters Thesis

Characterization of phenolics in Marion and Evergreen blackberries

Creator:: Siriwoharn, Thanyaporn
Abstract:: Frozen Marion (Rubus sp. hyb) and Evergreen blackberries (Rubus laciniatus) (whole berries, berries without seeds, and seeds alone) were acetone/ chloroform extracted. Phenolics were isolated using C₁₈ cartridges and polyamide resins, then characterized and measured by reversed-phase HPLC/diode array spectral techniques. The Polyamide isolated fractions of Marion berries contained four...
Resource Type:: Masters Thesis
Full Text:: *" Ronald E. Wrolstad Frozen Marion (Rubus sp. hyb) and Evergreen blackberries (Rubus laciniatus) (whole

Influence of cultivar and maturity on blackberry polyphenolics and investigation of sediment formation in blackberry juice

Creator:: Siriwoharn, Thanyaporn
Abstract:: The influence of cultivar and maturity on polyphenolic composition and antioxidant activity was investigated by UV-Visible spectrophotometry and analytical high performance liquid chromatography (HPLC) in commercially important blackberry cultivars and selections. The anthocyanin pigments changed tremendously with ripening. Total anthocyanins increased from 74.7-317 mg/100g fw from underripe to over ripe...
Resource Type:: Dissertation
Full Text:: Blackberry Juice. Abstract approved: "fc=»t- Ronald E. Wrolstad The influence of cultivar and

Use of ion-exchange and direct osmotic concentration technologies for processing cantaloupe juice

Creator:: Galeb, Abduljalil D. S.
Resource Type:: Dissertation
Full Text:: Abstract approved: Ronald E. Wrolstad Different technologies for processing cantaloupe fruit into

Radish anthocyanin extract as a natural red colorant for maraschino cherries

Creator:: Hundskopf, Maria Monica Giusti
Abstract:: Red radish anthocyanin extract (RAE) was investigated for coloring brined cherries as an alternative to FD&C Red No. 40. Red radish (Raphanus sativus L.) anthocyanins were extracted from liquid nitrogen powdered epidermal tissue using acetone, partitioned with chloroform, and isolated using C-18 resin. The monomeric anthocyanin content was determined by...
Resource Type:: Masters Thesis
Full Text:: : Radish Anthocyanin Extract as a Natural Red Colorant for Maraschino Cherries. Abstract approved

Development of a process for production of cantaloupe juice concentrate and determination of its composition and quality

Creator:: Galeb, Abduljalil Derhm Saeed
Abstract:: Fresh ripe, cantaloupes were processed into juice and juice concentrate. Processing trials were conducted on fresh and frozen fruits with and without rind. The effects of maceration enzymes and fining agents on yield and quality were investigated. Compositional measurement included °Brix, pH, titratable acidity, formol values, ascorbic acid content, total...
Resource Type:: Masters Thesis
Full Text:: : Development of a Process for Production of Cantaloupe Juice Concentrate and Determination of its

Anthocyanin pigment, nonvolatile acid and sugar composition of blackberries

Creator:: Fan-Chiang, Ho-ju
Abstract:: The pigments of blackberry fruit were investigated by analytical and preparative high performance liquid chromatography (HPLC) to characterize anthocyanin patterns in commercially important blackberry (Rubus eubatus) cultivars and selections. Five anthocyanin pigments were detected in Evergreen blackberry and they were identified as cyanidin-3-glucoside, cyanidin-3-rutinoside, pentosecyanidin derivative and two acylated cyanidin...
Resource Type:: Masters Thesis
Full Text:: ._S_i-:....,g,,..~n'-a-'-tu~r~e-r_e~d-a~c-te~d~fo~-r~p~riv_a_c_y_.__,._l ____ _ Ronald E. Wrolsted

The role of ascorbic acid on discoloration of strawberry juice and concentrate

Creator:: Poei, Metty Soek-Kioen
Abstract:: The purpose of this.investigation was to determine how enzymes and oxygen influence the role ascorbic acid has on pigment degradation and browning during storage for strawberry juice and concentrate. The ascorbic and dehydroascorbic acid content of blanched and unblanched, nitrogen-treated and air-exposed samples of strawberry juice and concentrate was measured...
Resource Type:: Masters Thesis
Full Text:: CONCENTRATE Abstract Approved:_ Dr. Ronald E. Wrolstad The purpose of this.investigation was to determine

ScholarsArchive@OSU

Enzymatic formation and influence of variety, maturity and processing on volatiles of the carrot, Daucus carota L.

Influence of processing and storage on the phenolic composition of apple, pear and white grape juice

Anthocyanin pigment, nonvolatile acid and sugar composition of red raspberry juice

Characterization of phenolics in Marion and Evergreen blackberries

Influence of cultivar and maturity on blackberry polyphenolics and investigation of sediment formation in blackberry juice

Use of ion-exchange and direct osmotic concentration technologies for processing cantaloupe juice

Radish anthocyanin extract as a natural red colorant for maraschino cherries

Development of a process for production of cantaloupe juice concentrate and determination of its composition and quality

Anthocyanin pigment, nonvolatile acid and sugar composition of blackberries

The role of ascorbic acid on discoloration of strawberry juice and concentrate

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