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  • 1
    Digitale Medien
    Digitale Medien
    Effects of ring substituents and linker chains on the bifunctional intercalation of diacridines into deoxyribonucleic acid (1980)
    s.l. : American Chemical Society
    Biochemistry 19 (1980), S. 5825-5836 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00566a026
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  • 2
    Digitale Medien
    Digitale Medien
    Evaluation of thin-layer methods in urine cytology (2001)
    Oxford UK : Blackwell Science Ltd
    Cytopathology 12 (2001), S. 0 
    Details
    ISSN: 1365-2303
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Evaluation of thin-layer methods in urine cytology Conventional cytospin smears prepared from urinary tract specimens were compared with two new thin layer techniques, i.e. ThinPrep® and AutoCyte PREP™. Cellularity, cell preservation, background features, detection rate, screening time and ease of preparation were evaluated. Thin-layer techniques when applied to urine cytology were found to improve cell yield and cell preservation, and reduce background artefact. The reporting rate for abnormal urothelial cells was comparable to conventional cytospin smears, as was screening time. Laboratory staff found the methodologies to be practicable and easily incorporated into a large routine diagnostic service. We conclude that a one-slide thin-layer urine preparation is comparable to four cytospin slides in the detection of urothelial abnormalities, and that both ThinPrep® and AutoCyte PREP™ have comparable features.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2303.2001.00341.x
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  • 3
    Digitale Medien
    Digitale Medien
    Prospective study of PAPNET: review of 25656 Pap smears negative on manual screening and rapid rescreening (1999)
    Oxford, UK : Blackwell Science Ltd
    Cytopathology 10 (1999), S. 0 
    Details
    ISSN: 1365-2303
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: In this prospective study, 27014 Pap smears were selected for PAPNET review on the request of the referring practitioner or patient. Smears that were negative on routine manual screening were submitted for rapid rescreening. Smears considered normal after these two manual screens (n = 25656) were reviewed using the PAPNET testing system. Routine manual screening identified 1340 (4.96%) of the smears as abnormal, and a further 18 (0.07%) abnormalities were detected by rapid rescreening. PAPNET review identified an additional 102 (0.4%) abnormal smears, including 10 histologically confirmed high grade lesions. The use of PAPNET testing following routine manual screening and rapid rescreening in tandem, enables cytologists to detect additional diagnostically significant abnormalities and reduce the rate of false-negative smears.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2303.1999.00186.x
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  • 4
    Digitale Medien
    Digitale Medien
    The fine structure of the chromatophores and other non-sensory components of the eye of the blue-eye, Pseudomugil signifer (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 19 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Aspects of the fine structure of the chromatophores and of other components of the eye of the blue-eye, Pseudomugil signifer, are presented. Comparisons are made with similar structures of the eye of the mosquitofish, Garnbusia affinis. The blue-eye has a well organized argentea but no tapetum. Two types of iridophores and melanophores are identified in the weal tract. The uveal tract also includes another presumed chromatophore, the lipopterinophore and an as yet unidentified cell type provisionally named weal polypodal cell. The blue iris of Pseudomugil is thought to be due to the mode of organization of the irideal type β iridophores.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb05831.x
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  • 5
    Digitale Medien
    Digitale Medien
    Alterations in the Contracture Band Patterns of Unfrozen and Prerigor Frozen Ovine Muscle Due to Variations in Post-Mortem Incubation Temperature (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 31 (1966), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Samples of unfrozen and prerigor frozen ovine semitendinosus muscle were incubated for 24 hr post-mortem at six temperature levels between 0 and 4O°C. Examination of electron-micrographs showed that variations in temperature caused muscle fibers to be in various states of contraction. The variations in sarco-mere length of unfrozen and prerigor muscle did not follow any specific course in relation to temperature. All the observed transverse striations were definable components of the sarcomere.Prerigor frozen muscle incubated at 30 and 40°C showed severe disruption of the Z lines. However, Z-line material was observed to be present in a disoriented state. H zones and M lines were observed in all samples, and their boundaries were clearly defined. The lengths of the H zones and M lines were constant among all treatments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1966.tb03252.x
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  • 6
    Digitale Medien
    Digitale Medien
    The ultrastructure and calcification of the scales of Tilapia mossambica (Peters) (1976)
    Springer
    Cell & tissue research 167 (1976), S. 37-47 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Scale ; Tilapia ; Calcification ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The scales of Tilapia are surrounded by an envelope of scleroblasts responsible for the production of layers of collagen that constitute the bulk of the scale. The scleroblasts adjoining the lateral face of the oldest scale region gradually atrophy. New collagen layers are deposited against the inner face of the scale, the adjoining scleroblasts showing evidence of high metabolic activity. Calcification occurs by inotropic deposition of crystals alongside the fibres. There is no sharp demarcation between calcified and non-calcified scale regions, a calcification front gradually moving towards newly formed collagen layers. It is felt that fish scales should be considered as calcified derivatives of dermal collagen layers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00220158
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  • 7
    Digitale Medien
    Digitale Medien
    The ultrastructure of the skin of Tilapia mossambica (Peters) (1974)
    Springer
    Cell & tissue research 154 (1974), S. 251-264 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Skin ; Tilapia ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The fine structure of the skin of Tilapia mossambica (Peters) is described. In certain areas the epidermal surface forms so-called Epidermal Surface Patterns. Two types of epidermal cells are distinguished and their differences noted. The epidermal surface is covered by a layer of acid mucopolysaccharide, yet the contents of the mucus cells did not react with ruthenium red. The dermis consists mainly of bundles of collagen fibres and associated fibroblasts, but melanophores, iridophores and complex melano-iridophores are also present. Aspects of the development and structure of the guanine platelets and the melanosomes are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00223167
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  • 8
    Digitale Medien
    Digitale Medien
    Positive plant spatial association with Eriogonum ovalifolium in primary succession on cinder cones: seed-trapping nurse plants (1989)
    Springer
    Plant ecology 80 (1989), S. 37-45 
    Details
    ISSN: 1573-5052
    Schlagwort(e): Idaho ; Primary succession ; Sagebrush-steppe ; Seed density ; Soil nitrogen ; Soil phosphorus ; Spatial pattern
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Cinder cones in Craters of the Moon National Monument in southcentral Idaho, USA were formed over 2200 yr B.P., but are still covered by large, relatively barren areas containing a sparse assemblage of plants. The spatial associations among 6 plant species on these sparsely vegetated areas were examined. All species were positively associated with the canopy region of Eriogonum ovalifolium var. depressum, an initial colonizer. All species were negatively associated with Pinus flexilis, a later-successional species. We examined soil seed densities and N and P levels under canopies of the 6 species to develop testable explanations for positive plant associations with E. ovalifolium. Soil seed densities of Phacelia hastata and Lewisia rediviva were higher under canopies of E. ovalifolium than under 4 of the 5 other species and bare areas. Soil total N under E. ovalifolium canopies was also higher than under 4 of the 5 other species and bare areas. Soil seed densities and N levels were similar under E. ovalifolium and Eriogonum umbellatum, both of which had dense, prostrate canopies. Soil available P levels under E. ovalifolium were not significantly different than under other species or bare ground. The positive associations of all species with E. ovalifolium is likely the result of seed-trapping by its prostrate canopy and more favorable establishment conditions under its canopy. The relative importance of these potential mechanisms can be tested with field experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00049139
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  • 9
    Digitale Medien
    Digitale Medien
    The ultrastructure of the eye of the mosquitofishGambusia affinis (1982)
    Springer
    Cell & tissue research 223 (1982), S. 431-443 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Eye ; Ultrastructure ; Gambusia affinis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The ultrastructure of the tissue components of the eye ofGambusia affinis, excluding the sensory cells, is described. The cornea consists of two different sections of collagenous layers of different density. The choroid includes an argentea composed ofα- andβ-melanophores, lipopterinophores and a choriocapillaris associated with the rete mirabile of the choroid body. Bruch's membrane, underlying the retinal pigment layer, can develop complex associations with fibroblasts delimiting the choriocapillaris. The outer section (stroma) of the iris includes several cell types that are not found in the inner or vitread section. In adultGambusia the lens capsule is well developed, but in twoweek-oldSarotherodon larvae the lens epithelium is covered only by a glycocalyx.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01258500
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