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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY— The effect of processing variables on the cell structure and physical characteristics of carrots were determined. The phloem portion of fresh carrots was subjected to one of the following treatments: blanching; cooking for 10 min; freezing at 0°F, −30°F or −320°F; freeze drying, compressing after freeze drying at approximately 1500 psi. Carrots at each treatment were tested for: (1) texture by means of the Ailo-Kramer Shear Press; (2) water holding capacity by centrifuging at 500, 1000, 1500, 2000 and 2500 rpm; (3) histological changes by microscope observation of the tissue structure. Results indicate that among all treatments, freezing temperature is the most critical factor affecting the cell structure of the carrots. Freezing at 0°F or −30°F results in considerable disruption of the cellular structure, whereas it was minimal at −320°F. Carrots frozen at −320°F showed firmer texture as well as higher water holding capacity than the rest. Significant correlation coefficient was established between the shear press values and percent weight loss measured by centrifugation. This suggests that the latter may be used as an objective test for measuring textural changes in processed carrots and perhaps other foods.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 241 (1971), S. 138-149 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The change of the charge radius and the quadrupole moment of the 2+-rotational state of174Yb are determined from Mössbauer measurements. Comparison with170Yb reveals slightly increasing rigidity at constant equilibrium deformation if two neutron pairs are added. Theoretical predictions are discussed, in connection with additional experimental data.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0878
    Keywords: Thymus ; Rabbit ; Glucocorticoids ; Metopirone ; Camber-positive cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Nachdem durch die NAHD-Reaktion (Camber, 1949) Ketosteroide in den granulierten Zellen des Kaninchenthymus dargestellt werden konnten (Möllmann et al., 1973), wurde der Ketosteroidgehalt des Thymus an Hand des zahlenmäßigen Verhaltens der Camber-positiven Zellen in der Postnatalzeit (1.–30. Tag), nach Glucocorticoidapplikation sowie nach Metopirongabe überprüft. Die bei der Geburt nur vereinzelt auftretenden granulierten Zellen vermehrten sich stetig bis zu einem Maximum am 9. postnatalen Tag, um daraufhin wieder abzunehmen. Ein Vergleich dieser Befunde mit dem relativen Thymusgwicht ergab eine nahezu gegensinnige Korrelation. Nach Verabreichung von Glucocorticoiden von Geburt an zeigten die Thymi von Kaninchen, die nicht am Wasting-Syndrom verstarben, eine deutliche Zunahme der Camber-positiven Zellen, wiederum gegenläufig zum relativen Thymusgewicht. Hingegen führte die mehrtägige Applikation von Metopiron zu keinen Veränderungen der Zahl und des Aussehens dieser Zellen. Die vorliegenden Befunde sowie die Ergebnisse anderer Autoren (s. Literatur) lassen eine Abstammung der Ketosteroide des Thymus aus dem Glucocorticoidmetabolismus vermuten.
    Notes: Summary After postnatal (1–30 days) administration of glucocorticoids or of metopirone to rabbits the ketosteroid content of the thymus was evaluated from the number of Camber-positive cells, using the NAHD-reaction of Camber (1949), which appears in granular cells of the rabbit thymus (Möllmann et al., 1973). Granular cells are sparse at birth and steadily increase in number, attaining a maximum on day 9, after which they decrease numerically. A comparison of these findings with the relative thymus weight shows an almost inverse correlation. After giving glucocorticoids from birth those thymi of rabbits which did not perish from wasting-syndrome showed a distinct increase in Camber-positive cells, again inversely to the relative thymic weight. On the other hand, administration of metopirone over a period of several days produced no change in either number or appearance of these cells. The above findings, combined with observations in the literature, lead to the assumption that ketosteroids of the rabbit thymus are derived from the glucocorticoid metabolism.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 142 (1973), S. 465-477 
    ISSN: 1432-0878
    Keywords: Rabbit thymus ; Ketosteroids ; Granulated cells ; Histochemistry ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Topochemisch konnten im Kaninchenthymus Ketosteroide nachgewiesen werden, für deren Vorhandensein die chemische Analyse von Thymuslipidextrakten Hinweise ergeben hatte. Die Darstellung der Ketosteroide erfolgte mit der NAHD-Reaktion (Camber, 1949). Diese Befunde dürften als spezifisch gelten, da eine Verfälschung durch freie Gewebsaldehyde, Plasmalogene (Gomori, 1952) und Corticosteroide (Khanolkar et al., 1958) ausgeschlossen wurde. Mit Hilfe der Camber-Methode konnten Granula bestimmter Zellen des Kaninchenthymus selektiv dargestellt werden, die auf Grund morphologischer Kriterien in zwei Gruppen unterteilt wurden. Die Zellen liegen im gesamten Thymusparenchym sowie im Bindegewebe der Septen und der sogenannten „Kapsel“. Prädilektionsorte stellen die Umgebung der Hassallschen Körperchen, die Mark-Rinden-Grenze, der intra- und perivasale Raum sowie die subkapsuläre Zone dar. Beide Zellgruppen sind Sudan III-, PAS- und Eosin-positiv, besitzen eine ausgeprägte gelbgrüne Eigenfluoreszenz und können differentialdiagnostisch gegen Mastzellen abgegrenzt werden. Elektronenmikroskopisch zeigen beide Zellgruppen zahlreiche Übereinstimmungen mit Reifestadien eosinophiler Knochenmarkszellen.
    Notes: Summary Ketosteroids were demonstrated topochemically in the rabbit thymus following indications given by chemical analysis of thymus lipid extracts. They were revealed by means of the NAHD-reaction (Camber, 1949). The results are thought to be specific, because adulteration by free tissue aldehydes, plasmalogens (Gomori, 1952) and corticosteroids (Khanolkar et al., 1958) can be excluded. The Camber-method selectively reveals the presence of two groups of morphologically differentiable granules in specific rabbit thymus cells which are distributed throughout the entire thymic parenchyme as well as in the connective tissue of the septa and the in so-called “capsule”. They are mainly seen in the vicinity of Hassall's bodies, in the zone between medulla and cortex, the intra- and perivascular space and in the subcapsular space. Both cell groups are Sudan III-, PAS- and eosin-positive, show intensive yellow-green primary fluorescence and can be distinguished from mast cells by differential diagnosis. Electron microscopy reveals that both cell groups show many similarities with the maturation phase of bone marrow eosinophils.
    Type of Medium: Electronic Resource
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