Index Catalog // ScholarsArchive@OSU

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

Sensory evaluation and shelf-life modeling of ground coffee

Creator:: Briggs, Judith A.
Abstract:: Both consumer and descriptive analyses were used to study the shelf-life of packaged, roasted and ground coffee in order to evaluate the utility of using sensory data in a shelf life model, and to examine the ability of consumers to detect a difference between treated and control samples. Two types...
Resource Type:: Masters Thesis

Aroma and flavor of cachaca, Brazilian rum

Creator:: Brown, Laurie L. (Laurie Lee)
Resource Type:: Masters Thesis

Effect of high hydrostatic pressure (HHP) on the bacterial count and quality of shucked oysters

Creator:: Shiu, Shu-Er
Abstract:: The effects of various pressure treatments (OK, 30K, 60K, 75K psig) and packing medium (water or cocktail sauce) on shucked oysters were investigated. The pH, moisture content, microbiological tests (including aerobic plate count (APC) and anaerobic plate count (ANPC)), enzyme assays (i.e. α-amylase, β-amylase, lipase and peroxidase activities) were conducted...
Resource Type:: Masters Thesis

Cross-cultural sweetness preferences for a sports drink

Creator:: Chung, Seo-Jin
Abstract:: Asian countries have become one of the largest export markets for US food developers during the past decade. Understanding consumer expectations and needs in a cross-cultural framework has gained importance for new products to succeed in the international markets. A sports-drink, which is a functional drink for athletes, has been...
Resource Type:: Masters Thesis

Fish sauce : the alternative solution for Pacific whiting and its by-products

Creator:: Lopetcharat, Kannapon
Abstract:: Pacific whiting and its by-products were good raw materials for high quality fish sauce production. Heat stable and salt activated enzymes were responsible for autolytic activity in Pacific whiting and by-products. According to temperature profiles of raw materials at various salt concentrations, two fermentation temperatures, 35°C and 50°C, were selected...
Resource Type:: Masters Thesis

Evaluation of hydrostatic pressure and storage effects on Cheddar cheese microstructure by thermal conductivity, differential scanning calorimetry and enzymatic proteolysis

Creator:: Yang, Jie
Resource Type:: Masters Thesis

Sensory changes in high pressure processed vs. heat processed food systems over time

Creator:: Rodakowski, Andrea M.
Abstract:: This study was undertaken to determine the sensory differences in high pressure vs. heat processed food systems after storage at ambient and refrigerated temperatures as determined by a trained sensory panel. Spanish rice and spaghetti with meat sauce were prepared and treated with heat and with high pressure processing (HHP)....
Resource Type:: Masters Thesis

Sensory and chemical analysis of 1997 Oregon Pinot noir enzyme treated wines

Creator:: Goldberg, Naomi
Abstract:: Pinot noir has a reputation for lower color stability than other red wine varieties. Because it has relatively low anthocyanin and phenolic content and lacks acylated anthocyanin pigments compared to other red vinifera varieties, color extraction and stability are particularly important. Varying the processing during fermentation of red wine can...
Resource Type:: Masters Thesis

Induction of autoantibodies in MRL/lpr mice exposed to 2% aniline denatured low-erucic acid rapeseed oil, an oil associated with the Spanish Toxic Oil Syndrome

Creator:: Richards, Carolyn L. K.
Abstract:: In 1981, illegal processing of rapeseed oil by a Spanish oil refinery resulted in the mass foodborne illness epidemic known as Toxic Oil Syndrome (TOS). The toxic oil associated with this epidemic was sold in neighborhood markets and by itinerant salesmen as inexpensive olive oil. Ingestion of the toxic oil...
Resource Type:: Masters Thesis

Antimicrobial activity of nisin and hen lysozyme

Creator:: Jaczynski, Jacek
Abstract:: Varying concentrations of the food preservatives nisin and lysozyme were adsorbed onto glass surfaces chemically modified to exhibit different degrees of hydrophobicity. The antimicrobial activity of the adsorbed preservatives was evaluated by documenting the ability of Listeria monocytogenes to adhere and grow on the glass surfaces. A bioluminescence protocol was...
Resource Type:: Masters Thesis

Use of hedonic scales among Chinese, Koreans, and Thais

Creator:: Yeh, Lue-Lih
Abstract:: To satisfy the desires of consumers in global markets for new products, it is essential that the cross-cultural differences in product acceptance are understood. An important aspect in cross-cultural research is the measurement tool of product acceptance. The most common scale for acceptance testing is the 9-point hedonic scale that...
Resource Type:: Masters Thesis

Extending shelf-life of fresh-cut pears

Creator:: Dong, Xiaoling
Abstract:: Different concentrations of various browning inhibitors and a firming agent were evaluated to prevent browning and softening of Bartlett, Bosc and Anjou pear slices during cold storage at 2-4°C. Browning inhibition effect of Semperfresh, Snow Fresh and cysteine were compared with that of 4-hexylresorcinol (4-HR). The effect of ripeness on...
Resource Type:: Masters Thesis

Characterization of recombinant proteinase inhibitors in surimi application

Creator:: Akpinar, Ozlem
Abstract:: High proteolytic activity Pacific whiting muscle causes hydrolysis of myofibrillar protein and lowers surimi gel quality. Although food grade proteinase inhibitors can be used to prevent autolytic activity in surimi, their usage is limited due to their adverse effects on the organoleptic quality of surimi. Cystatins however can be used...
Resource Type:: Masters Thesis

Gas chromatography/olfactometry and descriptive analysis of Valencia orange juice

Creator:: Shah, Rohan
Abstract:: Heat treated orange juice, both pasteurized and concentrate, are being increasingly consumed in the U.S. Orange juice is primarily heat treated to increase its shelf life, by curbing the growth of microorganisms; and to inactivate pectin methylesterase, which demethylates pectin and leads to cloud loss in the juice. However, because...
Resource Type:: Masters Thesis

Quality assessment of Asian noodles made from U.S. wheat flours using sensory descriptive analysis

Creator:: Janto, Mimi
Abstract:: As a major wheat exporter to countries all over the world, the United States has to produce wheat that satisfy different quality requirements requested by their customers. Over the past decade the United States has encountered a major problem, that of losing market share in Asia to Canada and Australia....
Resource Type:: Masters Thesis

Development of optimum pasteurization conditions for surimi seafood

Creator:: Shie, Jin-Shan
Resource Type:: Masters Thesis

Gas chromatography/olfactometry and descriptive analysis of cold-pressed lemon oil aroma

Creator:: Young, Sheri L.
Abstract:: Lemon oil quality is affected by numerous factors including lemon variety, climate, soil type, extraction method, etc.. Therefore, quality largely depends upon the lemons' origin, and aroma profiles of oils obtained throughout the world have potential to vary considerably. This research was conducted to identify differences in the aroma profiles...
Resource Type:: Masters Thesis

Effects of starch on rheological, microstructural, and color properties of surimi-starch gels

Creator:: Yang, Hong, 1968-
Resource Type:: Masters Thesis

Molecular cloning and sequence analysis of cystatin from rainbow trout (Oncorhynchus mykiss)

Creator:: Li, Fugen
Abstract:: A partial cystatin cDNA from rainbow trout was generated by reverse transcription polymerase chain reaction with two degenerate primers. The partial cystatin PCR product was 168 bp and used to screen trout liver λgt 11 cDNA library. Four positive clones were isolated and designated as cstl, cst2, cst3 and cst4....
Resource Type:: Masters Thesis

Analysis of flavor precursors in radish and radish color extracts

Creator:: Kucza, Myriam M.
Abstract:: Radish anthocyanin extract has potential as a natural colorant because of its pigment stability and attractive red hue. Presence of undesirable aroma compounds could limit its applications in foods. The pungent principle of radish, 4-methylthio-3-butenyl isothiocyanate (MTBI), is produced enzymatically upon cell injury from its glucosinolate precursor, 4-methylthio-3-butenyl glucosinolate (MTBG),...
Resource Type:: Masters Thesis

Aroma qualities of raw hops and hops in beer by trained panel free-choice profiling

Creator:: Stucky, Gregory J.
Abstract:: Hops contribute many desirable aromas to beer. Traditionally hop aromas have been described by the point of addition in the brewing process (dry-hop, finish-hop, or kettle-hop). The compounds present in the oil provide a wide range of aroma qualities. Since the composition of the oil is different for each hop...
Resource Type:: Masters Thesis

Use of linear and nonlinear programming to optimize surimi seafood

Creator:: Yoon, Won Byong
Abstract:: Least cost formulations for surimi seafood were studied by linear programming (LP) and nonlinear programming (NLP). The effects of water and starches on functional properties of Alaska pollock and Pacific whiting surimi gels were investigated. Six starches (modified potato starch, potato starch, modified wheat starch, wheat starch, modified waxy corn...
Resource Type:: Masters Thesis

Microbial stability of fresh cut pineapple and pineapple juice pasteurized by step-pulsed and static ultra high pressure treatments

Creator:: Aleman-Ordonez, Giovanna Dominick
Abstract:: Static ultra-high pressure (200, 270, and 340 MPa) and sinusoidal and step-pressure (0-270 MPa) pulses were compared by determining their effects on bacteria and yeast survival counts. Samples were commercial pineapple chunks used as is and fresh cut pineapple and pineapple juice inoculated with Saccharomyces cerevisiae 2407-1a. Surviving bacteria and...
Resource Type:: Masters Thesis

Influence of extractives on the chemical analysis of switchgrass

Creator:: Tandjo, Djuhartini
Abstract:: This thesis summarizes an investigation into the need for removing extractives from herbaceous biomass feedstocks prior to their chemical characterization. Switchgrass (Panicum virgatum), was used in this study as a representative herbaceous biomass feedstock. The influence of extractives on the chemical analysis of switchgrass was done by comparing the composition...
Resource Type:: Masters Thesis

The role of solvent extraction in the chemical characterization of corn stover feedstock

Creator:: Thammasouk, Khamphet
Abstract:: The consequences of extracting com stover feedstock with either 95% ethanol or hot water prior to the chemical analysis of the macrocomponents of that feedstock have been determined. Reports by others have recommended the removal of extraneous substance by solvent extraction prior to chemical analyses (Browning, 1967; TAPPI, 1988). The...
Resource Type:: Masters Thesis

Characterization of Pacific whiting proteinase P-II and partial cloning of cathepsins L and K cDNA from rainbow trout liver

Creator:: Nickel, Xianbin F.
Abstract:: Proteinase P-II purified from parasitized Pacific whiting muscle was previously identified to be one form of cathepsin L. It appeared to be present in three isozymatic forms on non-denaturing PAGE gel stained for activity. Its autolytic degradation was observed on SDS-PAGE gel under its optimum condition, 55°C and pH 5.5,...
Resource Type:: Masters Thesis

Components of bovine plasma that enhance gel strength in Pacific whiting surimi

Creator:: Peters, Margo Y.
Abstract:: Proteolysis of myofibrillar proteins in Pacific whiting surimi occurs when the 50- 70°C temperature range is reached during standard cooking procedures (e.g. 90°C for 15 min). This proteolytic activity results in the softening of surimi gels. Bovine plasma protein (BPP) is the most effective of the food-grade inhibitors used to...
Resource Type:: Masters Thesis

Elution of adsorbed proteins at hydrophobic and hydrophilic surfaces by dodecyltrimethylammonium bromide and sodium dodecyls sulfate

Creator:: Vinaraphong, Pravina
Abstract:: Adsorption kinetic data recorded for α-lactalbumin, β-casein, β-lactoglobulin, bovine serum albumin and lysozyme at silianized silica surfaces of low and high hydrophobicity, along with a simple model for adsorption and surfactant-mediated elution of protein, were used to analyze the removal of each protein by sodium dodecylsulfate (SDS) and dodecyltrimethylammonium bromide...
Resource Type:: Masters Thesis

Alternative products from Pacific whiting : fresh surimi and texturized mince

Creator:: Pipatsattayanuwong, Siriporn
Abstract:: The major portion of Pacific whiting (PW) is commercialized in the form of frozen surimi. Alternative products for PW were investigated focusing on fresh surimi and texturized meat from PW mince. Fresh surimi is made without additives and kept refrigerated instead of frozen. Texturized meat is a meat-like product made...
Resource Type:: Masters Thesis

The use of lysozyme in winemaking : the interaction of lysozyme with wine and efficacy in preventing malolactic fermentation in Oregon Pinot noir and Chardonnay

Creator:: Green, Jeffery L.
Abstract:: Hen egg white lysozyme is a hydrolytic enzyme effective at preventing the growth of Gram positive bacteria by degrading the bacterial cell wall to a point of cell lysis. Investigating lysozyme as a processing tool in wine to control the growth of lactic acid bacteria and malolactic fermentation has significant...
Resource Type:: Masters Thesis

Porosity, surface area and enzymatic saccharification of microcrystalline cellulose

Creator:: Tantasucharit, Usicha
Abstract:: The research described in this thesis was aimed at understanding how particle size, porosity, and enzyme accessible surface area influence the rate of saccharification of microcrystalline cellulose. Microcrystalline cellulose (MCC) is a commonly used substrate for the study of cellulolytic enzymes. MCC preparations of different particle size are commercially available....
Resource Type:: Masters Thesis

Osme and sensory analysis of aqueous orange essence

Creator:: Bazemore, Russell A.
Abstract:: The effect of refluxing on the aromas of Valencia aqueous orange essences was determined through analysis by GC, MS, Osme, and by a descriptive panel. The strengths and descriptions of volatiles were investigated to determine if differences in essence aroma character and intensity existed. During production, 1 sample was subjected...
Resource Type:: Masters Thesis

Characterization of Pacific whiting protease and food-grade inhibitors for surimi production

Creator:: Weerasinghe, Vasana C.
Abstract:: Cathepsin B was the most active cysteine proteinase in the Pacific whiting (Merluccius productus) fish fillet, and cathepsin L in surimi when the activities of the most active cysteine proteinases (cathepsin L, B, and H) were compared. Cathepsin L showed maximum activity at 55°C in both fish fillet and surimi,...
Resource Type:: Masters Thesis

Physical and chemical changes in stabilized mince from Pacific whiting during frozen storage

Creator:: Magnusdottir, Edda
Abstract:: Cryoprotection in stabilized mince from Pacific whiting (Merluccius productus) was investigated by monitoring changes in physical and chemical properties during 32 weeks of frozen storage. The effects of 4 different cryoprotectants were evaluated by torsion test, color analysis, extractability of salt soluble proteins, and formation of dimethylamine (DMA) and 2-thiobarbituric...
Resource Type:: Masters Thesis

Solubility and sensory characteristics of quercetin aglycone

Creator:: Vaia, Renee L.
Abstract:: New research has identified flavonols as a class of phenolic compounds which can be manipulated by both vineyard and winery practices. These phenolic compounds are key quality components of wine, affecting sensory characteristics, wine color, and wine stability. Modification of the phenolic precursors in grapes occur during fermentation and aging...
Resource Type:: Masters Thesis

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

Developmental regulation of flavin-containing monooxygenase (FMO) form 1 and form 2 mRNA in fetal and neonatal rabbit

Creator:: Yueh, Mei-Fei
Abstract:: The mammalian FMO represents a multigene family which oxygenates a large number of xenobiotics. No physiological role has been determined for FMO, although synthesis of disulfide bonds and detoxification of dietary chemicals have been suggested. Five FMO gene subfamilies, each containing a single gene, have been identified. In this study,...
Resource Type:: Masters Thesis

Sensory and chemical evaluation of riesling, chardonnay and pinot noir fermented by different strains of Saccharomyces cerevisiae

Creator:: Dumont, Ann
Abstract:: Fermentation of the grape must into wine is one of the most important steps in winemaking. Selected yeast strains of Saccharomyces cerevisiae have been used for many years to ensure complete and even fermentations. The formation of volatile compounds also occurs during fermentation and will influence the sensory perception of...
Resource Type:: Masters Thesis

Adsorption of selected charge mutants of bacteriophage T4 lysozyme at silanized silica surfaces

Creator:: Podhipleux, Nilobon
Abstract:: The adsorption kinetics exhibited by selected charge mutants of T4 lysozyme at silanized silica surfaces were monitored with in situ ellipsometry. Mutant lysozymes were produced by substitution of lysine (Lys) with glutamic acid (Glu). Each substitution resulted in a decrease in the net charge of the protein by 2 units....
Resource Type:: Masters Thesis

Flavor characterization of selected acidulants in model and food systems

Creator:: Hartwig, Pam A.
Abstract:: Acidulants can contribute considerably to the flavor of food. However, limited research on differences in acid flavor exists. While numerous researchers have studied acids, most have focused on sourness exclusively. Acids have been shown previously to differ in non-sour components, such as bitterness and astringency. A series of experiments were...
Resource Type:: Masters Thesis

Quantitative polysaccharide analysis of lignocellulosic biomass

Creator:: Fenske, John J.
Abstract:: Lignocellulosic biomass is a potential source of fermentable sugars such as glucose. Enzymatic hydrolysis of cellulose is a viable method of solubilizing the glucose from biomass, but the cellulose fraction of native lignocellulosic material is shielded from enzymatic attack by the lignin-hemicellulose matrix surrounding it. Pretreating lignocellulosic biomass with dilute...
Resource Type:: Masters Thesis

Nonstarch polysaccharide fractions of raw, processed and cooked carrots

Creator:: Kim, Sooyoun
Abstract:: The total and soluble nonstarch polysaccharide (NSP) components of raw, processed (canned and frozen) and home-cooked (boiled) Royal Chantenay carrots have been analyzed. NSP fractions were characterized by separation and summation of the monosaccharides resulting from acid hydrolysis of the parent polysaccharides. Total NSP was primarily composed of glucose, ~37%,...
Resource Type:: Masters Thesis

Kinetic properties and characterization of purified proteases from Pacific whiting (Merluccius productus)

Creator:: Wu, JuWen
Abstract:: Kinetic properties of the two proteases, causing textural degradation of Pacific whiting (Merluccius productus) during heating, were compared and characterized with the synthetic substrate, Z-Phe-Arg-NMec. Pacific whiting P-I and P-II showed the highest specificity on Z-Phe-Arg-NMec, specific substrate for cathepsin L. The K [subscript m] of preactivated P-I and P-II...
Resource Type:: Masters Thesis

Complex mechanism of chitosan and naturally occurring polyanions

Creator:: Mireles-DeWitt, Christina A.
Resource Type:: Masters Thesis

Improved moisture permeability determinations for packaging films and food coatings

Creator:: Tello-Lopez, Edgar Eduardo
Abstract:: Equipment and procedures for the rapid measurement of the water vapor permeability of polymer films and food coatings has been evaluated. The method uses an electronic sensor to measure the concentration increase in water vapor diffusing through a film into a chamber of known volume. Air of known humidity is...
Resource Type:: Masters Thesis

A filter paper assay for low cellulase activities and the cultivation of Trichoderma reesei on acid whey and sweet whey permeate

Creator:: Nordmark, Tor Soren
Abstract:: The traditional filter paper assay for saccharifying cellulase originally described by M. Mandels et al (1976) has been modified to make possible low activity determinations of Trichoderma cellulases. The enzymatic activity appears to decline during a prolonged incubation period if no precautions have been taken. By means of adding bovine...
Resource Type:: Masters Thesis

Peroxidase and lipoxygenase activities and their effect on the stability of polyunsaturated fatty acids in two different varieties of sweet corn (Zea mays L.), Jubilee and GH 2684, during frozen storage

Creator:: Rodriguez-Saona, Luis Enrique
Abstract:: The effect of different blanching treatments and packaging materials on the enzymatic (lipoxygenase and peroxidase) activity and fatty acid stability of two different varieties of sweet corn on the cob (Jubilee and GH 2684) was evaluated during nine months of frozen storage at -23.3°C. The initial moisture content in the...
Resource Type:: Masters Thesis

Characteristics of Northern squawfish (Ptychocheilus oregonensis) and feasibility for utilization as human food

Creator:: Lin, Dongdong
Abstract:: The characteristics of Northern squawfish (Ptychocheilus oregonensis) and the feasibility of utilization of this species for human consumption were investigated. In the first experimental phase, the iced storage characteristics of squawfish were determined. Quality changes were monitored over 24 days of storage by chemical, physical, microbiological and sensorial methods of...
Resource Type:: Masters Thesis

Apparent inhibition of Pacific whiting surimi-associated protease by whey protein concentrate

Creator:: Piyachomkwan, Kuakoon
Abstract:: Surimi is a seafood product which is used to manufacture restructured products such as artificial crab and lobster. Surimi is produced from fish fillets by washing to remove sarcoplasmic proteins and increase the concentration of myofibrillar proteins, and mixing with cryoprotectants. A valuable attribute of surimi is its ability to...
Resource Type:: Masters Thesis

Search Constraints

Search Results

Limit your search