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  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: About 60% of the protein in cottonseed flour is storage protein. The molecular weights of the major polypeptides that make up the SP fraction were estimated by electrophoresis. Two methods of sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) were used. At least 11 polypeptides are detectable and range from 57,560-6,100 daltons.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Commercial membrane processing is an emerging new field. Consequently, there is still much to be learned about the process in general and about particular applications. Except for the dairy industry, little work has been reported in the literature relative to food processing. The purpose of the work reported was to determine which factors influence membrane performance when processing cottonseed protein extracts by ultrafiltration. Interest was centered on those factors affecting membrane flux and ways to improve and maintain the flux during processing. Maintenance of membrane flux is imperative for the process to be economically feasible on a commercial scale. Protein extracts were prepared at the Food Protein Research and Development Center (FPRDC) pilot plant from glandless cottonseed flour using a selective extraction procedure. Extracts were pasteurized and processed directly or frozen until used. The effects of pressure, feed velocity, temperature and feed composition on permeate flux were investigated using different membranes and membrane systems. It was found that permeate flux could be estimated as a function of Reynolds number. Viscosity, an important variable in Reynolds number, was found to be a function of total Kjeldahl nitrogen in the membrane feed solution and the relation was of the form v= aBN where v is kinematic viscosity and N is feed nitrogen content, and a and B are constants which are functions of temperature. The viscosity did not correlate as strongly with total organics (total solids minus ash) or carbohydrates as with total nitrogen.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The consumption of protein isolates from oilseed flours is expected to continue its upward trend as meat analogs from vegetable proteins are more widely marketed. However, conventional protein isolation procedures are lengthy and somewhat expensive. These processes also result in whey-like liquid by-products which constitute a water pollution threat unless properly processed. Preparation of protein isolates and concentrates from glandless cottonseed and soy flours by extracting the protein and ultrafiltering the solubilized protein directly from the liquid extract was investigated. In the process devised, proteins normally precipitated to produce isolates were recovered together with the conventional whey protein by ultrafiltration (UF). The UF permeate was further processed with a reverse osmosis (RO) membrane. Different industrial UF and RO systems were utilized in 22–60 lb extractions. UF membranes were found which gave desirably high permeation rates and satisfactory constituent separations, especially with cottonseed storage protein (SP) extract. With SP extract, initial LJF permeate flux achieved was in excess of 1.50 gal of permeate per square foot of membrane area per day (gfd). The flux declined to 96 gfd over a period of 8 hr while the volume of original extract in the feed solution was being reduced by a ratio of 12.5 to 1 in the final UF concentrate. As expected, nonstorage protein (NSP) and SP extracts from cottonseed were found to require membranes having different molecular weight cutoff points. Noncellulose-based membranes performed better for this application because of their broader pH and temperature operating ranges.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 37 (1972), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Wet-extracted concentrate spray dried at two pH levels was evaluated for use in protein-fortified bread and as a component in meat loaf to reduce juice and fat cook-out during baking and to reduce meat requirement. Bread loaves containing air-classified glandless cone, 100% wheat flour and LCP glanded flour were significantly larger in volume than loaves from other blends, but there was no real difference among loaf volume of breads containing these three treatments. pH of spray drying had a marked effect on baking properties of the wet-process cone; pH 4.5 yielded a poor quality loaf while pH 6.8 loaf volume was equal to bread containing glandless cottonseed flours. Taste panel evaluations showed meat loaves containing 25% wet-extracted protein concentrate to be quite acceptable: milder or more bland than all-meat loaves and somewhat softer or smoother in texture.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: In work performed at the Food Protein R&D Center, three oilseed flours-deglanded liquid cyclone process (LCP) cottonseed flour, glandless cottonseed flour, and a high nitrogen solubility soy flour were used to fortify corn tortillas. Tortillas containing each of these flours blended with a corn tortilla flour to give 11%, 13%, and 15% protein in the blends were statistically compared in sensory tests for flavor, texture, and overall acceptability. An analysis of variance performed on panel scores indicated that the panel had no preference among the corn control tortillas and tortillas fortified with LCP and glandless cottonseed flours. The panel did, however, show a significant preference for each of these tortillas over soy-fortified tortillas. In color comparisons made with a Hunter Color-Difference meter, tortillas fortified with deglanded LCP cottonseed flour were increased in color over that of tortillas fortified with the other flours at the 11% protein level. As the amount of oilseed flours increased above the 11% blend level, the color of tortillas fortified with glandless and LCP increased noticeably. However, the color of soy-fortified tortillas essentially remained the same. Fortification of tortillas at the 11%, 13% and 15% blend levels increased the total protein by 18%, 40% and 61%, respectively. These tests indicated that protein-enriched tortillas can be prepared using oilseed flours.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: SUMMARY —Studies were made on nitrogen (protein) solubility of coconut meal in aqueous media over a range of pH's. The point of minimum solubility was found at pH 3.9 and nitrogen solubility increased toward the acidic and basic sides. Coconut proteins displayed a markedly different pH-nitrogen solubility profile in salt solutions, showing minimal solubility at acidic pH's (pH 〈inlineGraphic alt="leqslant R: less-than-or-eq, slant" extraInfo="nonStandardEntity" href="urn:x-wiley:00221147:JFDS725:les" location="les.gif"/〉 3), a sharp rise of solubility and a maximum at neutrality. Coconut meal prepared from fresh coconuts with and without testa removed, from parings and from a sample of sun-dried copra showed comparable solubility characteristics. However, meal prepared from commercial desiccated coconut showed low solubility, even under acid and alkaline conditions (pH 2 and 10). The most efficient solvent-to-meal ratio was found at 20:1 (v:w) for a single extraction, and a two-step 15:1 process for multiple extractions. Extractions using salt solutions show that the efficiency of extraction is greatly dependent upon pH; concentrations 〈inlineGraphic alt="geqslant R: gt-or-equal, slanted" extraInfo="nonStandardEntity" href="urn:x-wiley:00221147:JFDS725:ges" location="ges.gif"/〉 0.25M effect maximum extraction. Osborne classification studies of coconut meal indicate that 90% of the proteins would be classified as albumins and globulins.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 40 (1975), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 37 (1972), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 37 (1972), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 39 (1974), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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