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  • 1
    Electronic Resource
    Electronic Resource
    VARIABILITY IN PHYSICOCHEMICAL PROPERTIES OF DRIED WHEYS FROM COMMERCIAL SOURCES (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food quality 13 (1990), S. 0 
    Details
    ISSN: 1745-4557
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Variability in physicochemical characteristics of dried wheys was determined for samples collected from six commercial sources. Eight dried whey samples were collected from each plant over a six month period. The pH in water, percent ash, alkalinity of ash, solubility in water and in acid, and Browning Indexes with and without pronase digestion were determined for each dried whey. Whey proteins were evaluated by gel electrophoresis. Variability of pH in water and of percent ash were low for dried wheys from individual plants, however considerable variability existed in the other characteristics, both between plants and between samples from individual plants. Gel electrophoresis may be useful in evaluating the effects of whey processing and drying on whey proteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4557.1990.tb00012.x
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  • 2
    Electronic Resource
    Electronic Resource
    Immunohistological localization of IgG1, IgA and secretory component in the bovine mammary gland during involution (1988)
    Springer
    Cell & tissue research 251 (1988), S. 81-86 
    Details
    ISSN: 1432-0878
    Keywords: Immunohistochemistry ; Mammary gland ; Epithelial transport ; Milk secretion ; Lactation ; Bovine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Immunoperoxidase methods were used to localize secretory component, immunoglobulin A and immunoglobulin G1 in mammary tissue from dairy cows. In lactating tissue, immunostaining for immunoglobulin A and secretory component was observed primarily in the luminal contents of alveoli. By day 2 of involution, alveolar epithelial cells stained for both immunoglobulin A and secretory component. Staining of alveolar epithelial cells for immunoglobulin A and secretory component continued throughout the period of mammary involution. No staining for secretory component was observed in the interalveolar stromal area. Immunoglobulin G1 immunostaining was localized primarily in the interalveolar areas in lactating tissue, but was localized at the apical and basolateral surface of alveolar cells on day 2 of involution. In contrast to immunoglobulin A, immunoglobulin G1 staining of epithelial cells did not persist and was primarily in the interalveolar areas by day 4. These results suggest that an increased localization of immunoglobulin G1 in bovine mammary epithelial cells may occur transiently in early involution, while an increase in immunoglobulin A and secretory component localization in epithelial cells persists throughout involution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215450
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  • 3
    Electronic Resource
    Electronic Resource
    Total and differential cell counts and N-acetyl-β-D-glucosaminidase activity in sow milk during lactation (1988)
    Springer
    Veterinary research communications 12 (1988), S. 149-153 
    Details
    ISSN: 1573-7446
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Colostrum and milk collected from 11 sows throughout lactation were used to estimate total and differential cell counts and N-acetyl-β-D-glucosaminidase activity (NAGase). The mean log10 cell counts did not change significantly through the four weeks of lactation, ranging between 250 000 and 750 000 cells/ml. Polymorphonuclear neutrophils (PMN) decreased from about 56% of total leukocytes at day 1 (colostrum) to 12–14% at day 14 and day 21. Macrophages were 35% at day 1 and were the predominant cell type throughout the remainder of lactation, peaking at 77–80% at day 14 and 21. The PMN were again increased on day 28 (44% PMN vs 52% macrophage). The mean lymphocyte proportions ranged between 7.0 and 11.3% during the first two weeks of lactation and were decreased to 4.6–5.6% in the second two weeks of lactation. The activity of NAGase declined 9.5 fold (p〈0.0001) between day 1 and day 14 with the greatest decline between day 1 and day 3. The activity of NAGase remained constant through the last two weeks of lactation. NAGase activity was significantly correlated with log10 of cell counts in sow milk (r=0.42).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00362794
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