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  • Life and Medical Sciences  (2)
  • 07.75. + h  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Observation of new neutron rich nuclei29F,35,36Mg,38,39Al,40,41Si,43,44P,45–47S,46–49Cl, and49–51Ar from the interactions of 55 MeV/U48Ca+Ta (1989)
    Springer
    The European physical journal 332 (1989), S. 189-193 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.−k ; 07.75. + h ; 25.70.NP ; 27.30. + t ; 27.40. + z
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract After magnetic separation, identification through time of flight and δE×E measurements has allowed the observation of the new nuclei,29F,35,36Mg,38,39Al,40,41Si,43,44P,45,46,47S;46,47,48,49Cl;49,50,51Ar from the interaction of a48Ca beam of 55 MeV/u with tantalum targets.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289774
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  • 2
    Digitale Medien
    Digitale Medien
    Apoptosis in human skin development: Morphogenesis, periderm, and stem cells (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Developmental Dynamics 199 (1994), S. 176-188 
    Details
    ISSN: 1058-8388
    Schlagwort(e): Bcl-2 ; Apoptosis ; Programmed cell death ; Human fetal skin morphogenesis ; Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Medizin
    Notizen: During human skin development, embryonic- and fetal-specific periderm cells and incompletely keratinized cells are replaced by keratinocytes that differentiate while stratifying to form the fully functional epidermis. Proliferating basal cells of fetal skin also develop into epidermal appendages such as hair follicles and glands. We demonstrate that programmed cell death, not emphasized in conventional epidermal biology, has an important function in establishing the final architecture of the human epidermis and its appendages. Immunohistochemical localization of transglutaminases in fetal periderm, intermediate epidermal cells, and within appendages coincides with DNA fragmentation indicating that apoptosis is involved in deletion of these stage-specific cells and remodeling of appendages. The data also suggest that terminal differentiation of epidermal cells might be a specialized form of apoptosis. The pattern of expression of bcl-2, a gene associated with survival of some cells, is exclusive of the distribution patterns of markers of the cell death pathway. Bcl-2 protein is correlated with specific morphogenetic events in hair follicles and eccrine sweat glands, and its presence in single cells of the hair follicle bulge suggests that Bcl-2 may be a stem cell marker. © 1994 Wiley-Liss, Inc.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aja.1001990303
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  • 3
    Digitale Medien
    Digitale Medien
    The morphology of the honey bee (Apis mellifera L.) venom gland and reservoir (1984)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 181 (1984), S. 69-86 
    Details
    ISSN: 0362-2525
    Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Medizin
    Notizen: Hymenopteran venom glands are epidermal glands that have evolved from female accessory reproductive glands. In the honey bee, Apis mellifera L., the venom gland shows many of the fine structural features of primitive glands. A honey bee venom gland is a simple, long, thin, distally bifurcated structure, opening into an ovoid reservoir. Along most of the length of the gland are similar secretory units that have four major components (secretory cells, duct cells, ducts, and end apparatuses), except in the part of the gland proximal to the venom reservoir, where the secretory units resemble those around the venom reservoir. In the latter secretory units a funnel structure occurs between the duct (which is shorter than that of the secretory units of the gland) and the end apparatus. This funnel may be important in protecting the secretory cells around the reservoir from the cytolytic activity of the complex chemical mixture constituting the venom.
    Zusätzliches Material: 18 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jmor.1051810107
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