Index Catalog // ScholarsArchive@OSU

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:: . Clifford B. Pereira, and Dr. Florian L. Cerklewski for their valuable advice and wonderful support. I

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:: dysfunction, and stroke (Stavric 1997; Parr and Bolwell 2000). A review by Clifford (2000b) showed that 5-0

Identification of bacteria crucial to histamine formation and monitoring their occurrence and histamine accumulation in scombroid fish

Creator:: Kim, Shin-Hee
Abstract:: Bacterial histamine formation in mackerel and albacore was studied by inducing histamine in the muscles under controlled storage conditions. The optimum temperature for histamine formation was 25°C. The highest level of histamine detected was 283 mg/100 g in the 2-day stored mackerel; and 67.1 mg/100 g in the 6-day stored...
Resource Type:: Dissertation
Full Text:: of histamine, i.e., 270 mg/100 g (Clifford et al., 1989) and 500 mg/100 g (Russell and Maretic

Composition of flavonoid phenolic polymers isolated from red wine during maceration and significance of flavan-3-ols in foods pertaining to biological activity

Creator:: Aron, Patricia M.
Abstract:: Representing the most common flavonoid consumed in the American diet, the flavanols and their polymeric condensation products, the proanthocyanidins, are regarded as functional ingredients in various beverages, whole and processed foods, herbal remedies and supplements. Their presence in food affects food quality parameters including astringency, bitterness, sourness, sweetness, salivary viscosity,...
Resource Type:: Masters Thesis
Full Text:: , contribute to sourness, sweetness, or modulate saliva viscosity (Clifford 1997). The presence of

Changes in fruit flavor intensity in sucrose based model systems : effects of pH level, acid type, and sourness

Creator:: Cowden, John D.
Abstract:: Acidulants are an important functional ingredient group in the food industry, providing sourness, lowering pH, ensuring safe processing, and extending shelf life. Hence, understanding the effect of acids on sensory characteristics of foods is critical. Of the many topics dealing with acidulants, sourness is a topic where considerable research has...
Resource Type:: Masters Thesis
Full Text:: undissociated acid molecule is HA, H is the hydrogen ion, and K is the acid anion. Acid strength plays a role

Assessing the impact of temperature on grape phenolic metabolism

Creator:: Cohen, Seth D.
Abstract:: Many climatic factors influence grape berry composition including nutrient status, water availability, biotic stress, sun exposure and temperature. Previous research examined the effects of many factors listed above and much progress has been made. It is often difficult, however, to separate effects that typically confound each other, such as sun...
Resource Type:: Masters Thesis
Full Text:: . They provide the blue color to blueberries and the red to blood-oranges (Clifford, 2000). Phenolics

Understanding the principles and procedures to retain green and red pigments in thermally processed peels-on pears (Pyrus communis L.)

Creator:: Ngo, Thao Xuan
Abstract:: Thermal stabilization of chlorophyll and anthocyanin on pear peels during thermal process was investigated in this study. The green color of peels-on thermally processed (canned) pears was successfully retained by complexation of magnesium-free chlorophyll with zinc ions, and the red pigments were stabilized through anthocyanin-stannous complexation and polymerization of pear...
Resource Type:: Dissertation

Influence of vine vigor and shading in Pinot noir (Vitis vinifera L.) on the concentration and composition of phenolic compounds in grapes and wine

Creator:: Cortell, Jessica M.
Abstract:: In 2003 and 2004 vigor zones were delineated in two commercial vineyard sites based on vine growth variation to assess fruit and wine phenolic chemistry. In 2004, the effects of shading on the accumulation of phenolic compounds were also investigated. Model extractions were done from the shading experiment and the...
Resource Type:: Dissertation

Effect of high hydrostatic pressure and temperature on volatile off-flavors formation in milk

Creator:: Vazquez Landaverde, Pedro A.
Abstract:: The aroma of milk has been often defined as bland and pleasant, yet characteristic. Conventional thermal processing of milk can certainly extend shelf life, but inevitably changes its flavor. High pressure processing has been suggested as an alternative for milk pasteurization with improved fresh flavor retention. The objective of this...
Resource Type:: Dissertation
Full Text:: bovine milk, being the dissociation in the order 1 > K> asi > c52-caseins (Lopez-Fandino and Olano, 1998

ScholarsArchive@OSU

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

Characterization of phenolics in Marion and Evergreen blackberries

Identification of bacteria crucial to histamine formation and monitoring their occurrence and histamine accumulation in scombroid fish

Composition of flavonoid phenolic polymers isolated from red wine during maceration and significance of flavan-3-ols in foods pertaining to biological activity

Changes in fruit flavor intensity in sucrose based model systems : effects of pH level, acid type, and sourness

Assessing the impact of temperature on grape phenolic metabolism

Understanding the principles and procedures to retain green and red pigments in thermally processed peels-on pears (Pyrus communis L.)

Influence of vine vigor and shading in Pinot noir (Vitis vinifera L.) on the concentration and composition of phenolic compounds in grapes and wine

Effect of high hydrostatic pressure and temperature on volatile off-flavors formation in milk

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