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Filtering by: Creator Di, Y. Remove constraint Creator: Di, Y. Academic Affiliation Food Science and Technology Remove constraint Academic Affiliation: Food Science and Technology Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • An improved solvent extraction of onion oil

    Creator:
    Hernandez-Molinar, Ernesto
    Abstract:
    A simple process to obtain onion oil by direct solvent extraction was proposed. Several solvents commonly utilized in the food industry were tested for their selectivity in the extraction of the oil of onion. Diethyl ether and methylene chloride appeared to be the most suitable solvents for the extraction operation....
    Resource Type:
    Masters Thesis
    Full Text:
    thiophenes, propenyl di- and trisulfides. Boelens et al. (1971) carried out an extensive MS-GLC analysis

  • Determination of dimethylamine in barley malt

    Creator:
    Yoo, Lee-joung
    Abstract:
    Dimethylamine (DMA), in addition to the alkaloids hordenine and gramine, has been suggested as a potential precursor of nitrosodimethylamine (NDMA) in malt. Analytical procedures were adopted and applied to extract and quantify DMA from malt, green malt, malt roots and raw barley. Ground malt was extracted at room temperature with...
    Resource Type:
    Masters Thesis
    Full Text:
    bled excessively and could not be used on higher boiling diamines. In 1974, Di Corcia and Samperi

  • Ultrafiltration of grape juice by hollow fiber membranes

    Creator:
    Garcia-Quintero, Zeferino Heberto
    Abstract:
    The feasibility of using hollow fiber ultrafi1tration for clarification, stabilization and preservation of white grape juice was evaluated. Flux and process parameters of a hollow fiber membrane ultrafi1tration unit (Romicon pilot scale, model FXS-MXII), were studied using white Riesling grape juice. Optimum processing conditions were determined for different nominal membrane...
    Resource Type:
    Masters Thesis
    Full Text:
    Maria y Aurelia Josefi- na for their love and encouragement through my life and especially now

  • Formation of N-nitrosodimethylamine and nonvolatile N-nitrosamines from barley malt alkaloids

    Creator:
    Mangino, Mario M.
    Abstract:
    Amines formed by biosynthesis in germinated barley have been suggested as precursors for N-nitrosodimethylamine (NDMA) in barley malt dried by direct-fired kilning. This hypothesis was verified by germinating raw barley and exposing the resulting malt roots and clean malt to nitrous acid. Quantitation of the NDMA formed indicated that malt...
    Resource Type:
    Dissertation
    Full Text:
    NDMA From Aminopyrine, Di- methyl amine, Gramine, and Trimethylamine at 24° . . 65 Part 2

  • Effect of moisture, temperature, and sulfur dioxide on color of dried apples

    Creator:
    Sayavedra-Soto, Luis Alberto
    Abstract:
    When sulfur dioxide is used in commercial drying of fruits in combination with low storage temperatures, browning and microbial spoilage can be inhibited. However, the relationship between moisture level, storage temperature, and sulfur dioxide content on the color of dried fruit is not known; therefore the purpose of this research...
    Resource Type:
    Masters Thesis
    Full Text:
    surface diagrams of colors Yn and Y-j (a and b) in the limits of the experiment. Figure Page 17

  • Characterization of the collagen protein in smooth pink shrimp (Pandalus jordani)

    Creator:
    Akel, Phillip John
    Abstract:
    The collagen content and composition of collagens in different age classes of shrimp were determined. Their physical and chemical characteristics were investigated. The interrelationship of shrimp size and muscle collagen content to raw and cooked meat yield was established. Total collagen content for three lots of round shrimp with weights...
    Resource Type:
    Masters Thesis
    Full Text:
    region where food is di- gested and absorbed. The midgut forms a complex tubular gland commonly

  • Induction of hepatic microsomal enzymes in rainbow trout by dietary aroclor 1254 and the effect of cyclopropene fatty acids

    Creator:
    Voss, Sherri Denise
    Abstract:
    A dietary level of Aroclor 1254 (100 ppm) was fed to rainbow trout (Salmo gairdneri) for 15 weeks to determine the effects on hepatic microsomal enzyme induction. Fish were also fed combined polychlorinated biphenyl (PCB) (100 ppm) and cyclopropene fatty acids (CPFA) (50 ppm) to determine the effects on mixed...
    Resource Type:
    Masters Thesis
    Full Text:
    Fatty Acids Abstract approved: u JerZ^y D. Hendricks A dietary level of Aroclor 125^ (100

  • Characterization of anthocyanins in fruit juices and natural colorants

    Creator:
    Hong, Victor
    Abstract:
    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...
    Resource Type:
    Dissertation
    Full Text:
    and rhamnose. Di- and tri-saccharides also occur. The 3-hydroxyl position of the

  • Frameshift mutagenicity of flavonol glycosides activated by human fecalase enzyme

    Creator:
    Dardiri, Moawia Mohamed
    Abstract:
    Many substances in the plant kingdom and in man's diet occur as glycosides. Recent studies have indicated that many glycosides that are not mutagenic in tests such as the Salmonella/microsome test become mutagenic upon hydrolysis of the glycosidic linkages. The Salmonella/microsome test utilizes a liver homogenate to approximate mammalian metabolism...
    Resource Type:
    Dissertation
    Full Text:
    Rf Values 34 3 Yellow Onion (Y) Flavonoid Extract Rf Values 35 4 Raspberry (RB) Flavonoid Extract

  • Effect of various parameters on in vivo Aflatoxin B₁ binding to rainbow trout (Salmo gairdneri) liver DNA

    Creator:
    Whitham, Mark
    Abstract:
    Aflatoxin B₁ (AFB₁,) is a potent liver carcinogen to a number of animal species including rainbow trout (Salmo gairdneri). Microsomal activation is required for the in vitro conversion of AFB, to a reactive metabolite, thought to be the AFB₁,-2,3-oxide, which will bind nucleic acids, produce toxicity, and cause mutagenesis. Nucleic...
    Resource Type:
    Masters Thesis
    Full Text:
    reported to yield 5 times more di hydrodiol than rat liver microsomes in the absence of added