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  • 1975-1979  (8)
  • 1965-1969  (2)
  • 1
    Electronic Resource
    Electronic Resource
    PRESSURE-HEAT TREATMENT OF POST-RIGOR MUSCLE: OBJECTIVE-SUBJECTIVE MEASUREMENTS (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Instron compression, Warner-Bratzler peak shear force and adhesion measurements, together with subjective assessments, have been used to determine the effectiveness of a pressure-heat treatment in improving the tenderness of post-rigor muscles widely varying in connective tissue content. Both shear force and compression values were decreased by the treatment, the effect being greater on peak shear force values. It had little or no effect on adhesion values, which reflect connective tissue strength. The juiciness of the pressure-heat treated samples was significantly less than that of the controls. It was shown that although peak shear force values were considerably reduced, the tenderness of the treated samples was limited by connective tissue toughness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1977.tb12623.x
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  • 2
    Electronic Resource
    Electronic Resource
    PRESSURE-HEAT TREATMENT OF POSTRIGOR MUSCLE: EFFECTS ON TENDERNESS (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pressures of the order of 100 MNm—2 applied for 2.5 min or longer to postrigor muscle heated to 40–60°C improved the tenderness of the meat when subsequently cooked. The magnitude of the effect depended on the intensity and duration of pressurization, and the temperature attained by the meat during pressurization. As judged by taste panel assessment and by shear values of the cooked meat, the properties of pressure-heat treated postrigor muscle approximated those of prerigor pressurized muscle. The process is effective in overcoming toughness associated with contracted muscle. It is suggested that the treatment operates on the myofibrillar component of toughness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1977.tb01235.x
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  • 3
    Electronic Resource
    Electronic Resource
    PRESSURE-HEAT TREATMENT OF MEAT: EFFECT ON CONNECTIVE TISSUE (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of a pressure-heat treatment for meat tenderization on the properties of connective tissue have been investigated. Adhesion measurements on cooked muscle, which are thought to provide an index of connective tissue strength, were not significantly affected by the pressure-heat treatment. Shrinkage, isometric tension and transition heat measurements on epimysial/tendinous tissue obtained from sheep longissimus muscle indicated that application of pressure opposed heat-induced changes. It was therefore concluded that the pressure-heat treatment is not likely to have a tenderizing effect, greater than that of heat alone, on connective tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1978.tb02290.x
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  • 4
    Electronic Resource
    Electronic Resource
    Growth of an autonomously replicating parvovirus (feline panleukopenia): Kinetics and morphogenesis (1978)
    Springer
    Archives of virology 57 (1978), S. 107-122 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Feline embryo (FEmb) cell cultures, in which 90 percent of cells were dividing (cycling), were synchronized, by serum deprivation, to the degree that 88 per cent of the cells divided within a 12 hour period. When such cultures were infected with feline panleukopenia virus (FPV) at a multiplicity of infection of 5.7, a maximum level of cell associated virus was attained 28 hours post-infection (p.i.). There was a tendency for virus to remain cell associated in that cell lysis did not begin until 40 hours p.i. The genesis of FPV inclusion bodies was studied by light microscopy. Inclusions were intranuclear, weakly basophilic and Feulgen positive; they were first observed 8 hours p.i., and increased to be present in 90 percent of cells by 40 hours. Mitosis was markedly inhibited in FPV infected monolayers. The earliest changes observed by electron microscopy of infected cells were the presence of virus particles within nuclei, progressive chromatin margination, and nucleolar changes involving apparent segregation of the fibrillar and granular components. Virus particles measured ≃20 nm in diameter, and appeared either uniformly electron dense or possessed a dense margin and a pale center; many of the latter contained a single, central, dark spot. Virions ultimately became closely packed in all areas unoccupied by other nuclear components. In some nuclei a linear arrangement of virions was noted, but paracrystalline arrays were not seen. Other changes observed in infected nuclei included the presence of nucleolar remnants sometimes in the form of solid or hollow bodies comprised of nucleolar granules or filaments; distension of the space between the two membranes of the nuclear envelope; and the presence of aggregates of abnormal, electron dense material within the nucleus. Discontinuities of the plasma membrane and swelling of cytoplasmic organelles were commonly seen in cells showing advanced nuclear changes, but at least the inner membrane of the nuclear envelope generally remained intact. The characteristic, well defined inclusions of light microscopy were not observed by electron microscopy, and thus probably represented a preparation (shrinkage) artifact.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01315672
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrastructural studies of the development of feline calicivirus in a feline embryo cell line (1975)
    Springer
    Archives of virology 48 (1975), S. 317-325 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructural changes in a feline embryo continuous cell line infected with feline calicivirus at a multiplicity of infection of approximately 1 were studied. Virus was found only in the cytoplasm and was observed as single particles, as extensive, non-regular accumulations, as paracrystalline arrays, and as single or multiple linear arrays associated with microfibrils. Mature virus particles were readily distinguished from ribosomes in that they were larger (35 nm diameter) and consisted of a central, electron-dense core 20 nm diameter surrounded by a less electron-dense coat. Other changes observed in infected cells included rounding of the cell and nucleus and loss of pseudopodia. There was extensive production of smoothmembrane bound vesicles in the cytoplasm. Virus accumulations of each type, but especially paracrystalline arrays, were frequently closely associated with collections of these vesicles. The cisternae of the endoplasmic reticulum and the space between the two layers of the nuclear membrane was distended. By Feulgen staining and light microscopy, as well as electron microscopy, it was established that nuclear chromatin undergoes profound changes consisting of condensation usually into a single, rounded, central mass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01317430
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  • 6
    Electronic Resource
    Electronic Resource
    Ultrastructure of the theca interna of ovarian follicles in sheep (1978)
    Springer
    Cell & tissue research 187 (1978), S. 457-472 
    Details
    ISSN: 1432-0878
    Keywords: Ovarian follicles (sheep) ; Theca interna ; Oestrogen ; Androgen ; Capillaries ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The theca interna of non-atretic ovarian follicles from 2.0 mm in diameter up to the stage shortly following ovulation was studied by light and electron microscopy. In follicles 〈3.0mm in diameter, the theca interna consisted of about 8–12 layers of flattened cells, together with many capillaries and small bundles of collagen. Two main forms of cellular differentiation were seen. These were towards either fibroblast-like cells or presumed steroidogenic cells whose cytoplasm contained large amounts of predominantly smooth tubular endoplasmic reticulum, to which some ribosomes were attached. The majority of cells were of relatively undifferentiated or intermediate structure. In larger follicles up to the early stages of oestrus the theca interna cells became larger and less flattened, and cells rich in tubular endoplasmic reticulum became proportionately more numerous. By 18 h after the onset of oestrus the theca interna was oedematous, and many cells possessed pseudopodia. Many cells also contained numerous lipid droplets, but there were no signs of thecal cell degeneration or death. Shortly after ovulation the basal lamina of the membrana granulosa was incomplete, and it became more difficult to distinguish between theca and granulosa layers. Structural heterogeneity, with two major cell types and cells of intermediate structure, was present at all stages. It was concluded that: (1) the theca interna of 2.0–2.9 mm follicles contained many cells whose structure was compatible with a steroidogenic capacity; (2) changes in the differentiated thecal cells up to the early stages of oestrus were quantitative rather than qualitative, and suggestive of an increased steroidogenic capacity; (3) the accumulation of lipid in many cells of the theca interna by 18 h after the onset of oestrus probably reflected a reduction in steroidogenic activity; and (4) there was no evidence of any structural specialization to facilitate the transport of steroids from the theca interna to the membrana granulosa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229610
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  • 7
    Electronic Resource
    Electronic Resource
    Histochemical observations on mucin secretion by subsurface epithelial structures in the canine ovary (1966)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 120 (1966), S. 347-358 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Histochemical methods for mucins were applied to the ovaries of 23 dogs.Solid and hollow groups and cords of epithelial cells (subsurface epithelial structures, SES) in the outer part of the cortex regularly showed evidence of mucin secretion. Intracytoplasmic, sialic acid-containing, acid mucin secretion droplets were seen in solid and hollow SES, and secretion was present in both closed lumina and those opening onto the surface.Intracytoplasmic droplets in the cells of SES were distinctive, and similar droplets were not found in the cells of any other ovarian epithelial component. The secretion of SES was not shown to possess distinctive histochemical features.Mucin production was also observed in follicles, corpora lutea and rete tubules.The significance of ingrowth from the ovarian surface epithelium in adult life, and of secretory activity by the cells of SES, are discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051200403
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  • 8
    Electronic Resource
    Electronic Resource
    A histological study of non-follicular cysts in the ovulation fossa region of the equine ovary (1968)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 124 (1968), S. 313-320 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Forty-two unselected ovaries from adult mares were examined histologically, and with histochemical methods for mucins. A considerable part of the surface of the ovulation fossa was directly covered by columnar epithelium, with many ciliated cells. This epithelium, which was distributed mainly on the anterior side of the ovulation fossa, closely resembled the contiguous epithelium of the infundibulum of the oviduct, was frequently folded, and gave rise to short clefts projecting into the ovarian substance. The remainder of the ovulation fossa was covered by non-ciliated, low cuboidal or squamous epithelium, lacking folds or clefts.“Fossa cysts,” up to 6.5 mm in diameter, were observed in the ovarian tissue around the ovulation fossa in 27 (64%) of these ovaries. Both simple and branched, tubular and vesicular forms were present, and all were blind-ending. Their epithelial lining cells, which varied from simple squamous to columnar in type, were frequently ciliated. Many fossa cysts contained secretions histochemically similar to those of the columnar epithelium of the ovulation fossa and infundibulum. Both sialic acidcontaining and neutral mucins were present. It is suggested that these cysts were probably derived by ingrowth from the columnar epithelium of the ovulation fossa. This epithelium may be of müllerian duct origin.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051240305
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  • 9
    Electronic Resource
    Electronic Resource
    Observations on the vasculature of the reproductive tract in some Australian marsupials (1977)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 154 (1977), S. 95-113 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The origin, distribution and structure of the blood vessels of the female reproductive tract and the testis of the brush possum (Trichosurus vulpecula) were studied using latex and silicone rubber casting and histological techniques. Latex casts of the vessels of the female tract were also studied in five macropod species - Macropus giganteus, M. eugenii, M. agilis, Megaleia rufa and Thylogale billardierii, and in the common wombat (Vombatus ursinus).The female reproductive tract in the brush possum was supplied and drained by four major sets of paired vessels - ovarian, cranial urogenital, caudal urogenital, and internal pudendal arteries and veins. These vessels formed substantial anastomoses with one another on each side of the midline, and also across-the-midline anastomoses. The proximal part of the ovarian artery ran in close apposition to the ovarian vein, which received one or more large uterine branches. In its distal protion the ovarian artery gave rise to a leash of small, tortuous ovarian branches, which wound around and between the plexiform ovarian veins.The testicular arteries and veins in this species also ran in close apposition to one another. Both arteries and veins branched into many smaller, mildly tortuous, parallel vessels in the spermatic cord, which reunited before entering the testis.The blood vessels of the reproductive tract in all of the macropod species studied, and in the common wombat, were basically similar to those of the brush possum.The intimate structural relationships between ovarian arteries and veins, and their ovarian branches, in these marsupials are suggestive of specializations for counter-current exchange between venous and arterial blood. However, in contrast to those of the testicular vessels where heat exchange is a demonstrated function, their physiological significance remains unknown.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051540107
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  • 10
    Electronic Resource
    Electronic Resource
    The extrinsic blood vessels of the ovary of the sheep (1976)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 148 (1976), S. 287-303 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The extrinsic ovarian blood vessels were studied in 134 ewes. In view of recent evidence that uterine luteolysis may involve local veno-arterial transfer of prostaglandin F2α in the ovarian pedicle, particular attention was paid to the interrelationships between veins and arteries.The ovarian artery and utero-ovarian vein are large vessels of conventional structure and lie in close apposition. Their walls are slightly thinner on their apposing sides. The ovarian branches of the ovarian artery are very tortuous, and closely intertwined with the plexiform ovarian branches of the utero-ovarian vein.An extensive plexus of small veins surrounds the ovarian artery and its ovarian branches. Within this plexus are many thin-walled, dilated regions, interspersed with narrow, thick-walled segments. Valves are inconstantly present at sites of entry of branches of the plexus into the major veins. Small numbers of arterio-venous anastomoses are present in the distal part of the ovarian pedicle.Unless blood can flow in a veno-arterial direction through arterio-venous anastomoses or capillary beds, the structural barrier between uterine venous and ovarian arterial blood is substantial.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051480303
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