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  • 1
    Electronic Resource
    Electronic Resource
    Coccidia from the Tiger Salamander, Ambystoma tigrinum, in Northeastern Colorado and in Northern New Mexico (1972)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 19 (1972), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Oocysts of Eimeria ambystomae Saxe, 1955, Eimeria microcapi sp. n., and Eimeria urodela sp. n. are described from the tiger salamander, Ambystoma tigrinum, collected in Colorado and New Mexico. The oocysts of E. ambystomae are ellipsoid, 29.8 × 17.3 (24–38 × 15–25) μm, and the sporocysts lanceolate, 22.6 × 5.4 (16–27 × 5–7) μm. Oocyst and sporocyst residua are present, but not a polar granule and a micropyle. The oocysts and sporocysts of E. microcapi are ellipsoid, measuring respectively 38.1 × 25.3 (35-41 × 23-26) μm and 18.1 × 7.4 (16-19 × 6–8) μm. Oocyst and sporocyst residua, a micropyle (mean 3 μm), and a distinct micropyle cap (2 μm high) are present, but not a polar granule. The oocysts of E. urodela are spheroid, 22.2 (14-26) μm, and the sporocysts lanceolate, 16.3 × 5.8 (12-19 × 4-7) μm. Oocyst and sporocyst residua are present, but a polar granule and a micropyle are absent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1972.tb03449.x
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  • 2
    Electronic Resource
    Electronic Resource
    Liou, Kuotsai Tom: Managing Economic Reforms in Post-Mao China : Westport, CT, Praeger, 1998 (1999)
    Cambridge : Cambridge University Press
    The @China quarterly 158 (1999), S. 500-501 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S030574100000597X
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of timing of cutting on patterning and proportion regulation during regeneration of the planarian Dugesia tigrina (1991)
    Springer
    Hydrobiologia 227 (1991), S. 25-30 
    Details
    ISSN: 1573-5117
    Keywords: patterning ; regeneration ; planarian ; timing ; proportion regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The time interval between cuts that are made to obtain a tissue fragment from a planarian was found to be important to the process of its regeneration. Short fragments made by two transverse cuts across the body were more likely to regenerate abnormally when the interval between the two cuts was 5 or 12 min than when it was 1.5 min. The longer intervals specifically altered the regression line in the correlation between the length:width ratio of fragments and frequency of abnormal regenerates. This effect occured regardless of which region of the body the fragment was taken from. The time interval also affected body proportioning in regenerates and to the greatest degree in fragments derived from the region located immediately behind the head. These results indicate that events occuring shortly after a cut is made in a planarian significantly affect structure patterning and proportioning of the regenerate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027577
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  • 4
    Electronic Resource
    Electronic Resource
    Proportion regulation in the planarian, Dugesia tigrina following regeneration of structures (1998)
    Springer
    Hydrobiologia 383 (1998), S. 105-109 
    Details
    ISSN: 1573-5117
    Keywords: proportion regulation ; regeneration ; planarians ; Dugesia tigrina ; Tricladida ; Turbellaria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Planarian regenerates with abnormal body proportioning were followed after structure formation in order to determine if body proportion will ‘normalize’ over time. Results show proportioning will occur following structure formation since the pharynx in regenerates with proportionally larger heads and prepharyngeal area moved anteriorly over time. This occurred regardless of whether regenerates were provided with a normal feeding regime which allowed for an increase in body area or if they were on a maintenance diet which did not permit growth. An examination of mitotic indices did not demonstrate significant differences in the level of mitotic activity between pre- and postpharyngeal regions. It is concluded that the ‘normalizing’ of proportion in these abnormal regenerates does occur, but the process by which it occurs is not solely explained through normal growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003434215199
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  • 5
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy of epithelial surfaces of the sea anemone Acontiophorum niveum (Phylum Cnidaria): Class anthozoa (1989)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 200 (1989), S. 63-69 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Epithelium of the sea anemone Acontiophorum niveum is modified into four general arrangements of microappendages: (1) uniform microvilli covering pedal disc and column, (2) an interspersion of microvilli, ciliary cones, and kinocilia on tentacles, (3) flagella among an understory of microvilli from the oral disc, actinopharynx, filaments, and acontia, and (4) sparse flagella among irregular microvilli from endoderm. These arrangements are similar to those described previously in the epithelia of other anthozoans.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1052000108
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