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  • 1995-1999  (4)
  • 1980-1984  (1)
  • 1960-1964
  • 1870-1879
  • Bemisia argentifolii  (3)
  • Kidney  (2)
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Materialart
Erscheinungszeitraum
  • 1995-1999  (4)
  • 1980-1984  (1)
  • 1960-1964
  • 1870-1879
  • 1990-1994  (1)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Transitional cell carcinoma of the upper urinary tract: staging by MRI (1995)
    Springer
    Abdominal imaging 20 (1995), S. 365-367 
    Details
    ISSN: 1432-0509
    Schlagwort(e): Kidney ; MR, 81.1214 ; Kidney, neoplasm, 81.31, 81.21 ; Magnetic resonance (MR), contrast enhancement
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background This study evaluates the ability of MRI to stage transitional cell carcinoma of the upper urinary tract. Methods Nine patients who had transitional cell carcinoma of the upper urinary tract detected by other imaging modalities underwent MRI examination at 1.5 T. Imaging included pre- and postgadolinium-DTPA T1-weighted images (9 patients) pre- and postgadolinium chelate T1-weighted fat-suppressed spin echo (7 patients). Postcontrast images were acquired prior to the presence of gadolinium within the collecting system (〈2 min postcontrast), intermediate (2.5–8 min), and late (〉10 min) postcontrast. Images were prospectively interpreted and lesion staging was determined. Correlation with histopathology was obtained in all cases. Results Transitional cell cancers were demonstrated in 9/9 patients, and tumors ranged in size from 2 to 8 cm (mean = 3.8 cm) in one dimension. Correct tumor staging was performed in 8/9 patients. The staging error in one case occurred because direct tumor extension into the renal parenchyma was not detected. Conclusions The results of this preliminary study show that MRI stages transitional cell cancers relatively well; however, MRI is not able to detect superficial invasion of renal parenchyma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00203373
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  • 2
    Digitale Medien
    Digitale Medien
    Characterization and distribution of esterase electromorphs in the whitefly,Bemisia tabaci (Genn.) (Homoptera: Aleyrodidae) (1995)
    Springer
    Biochemical genetics 33 (1995), S. 205-214 
    Details
    ISSN: 1573-4927
    Schlagwort(e): Bemisia tabaci ; Bemisia argentifolii ; cotton whitefly ; squash silverleaf disorder ; sweetpotato whitefly ; tobacco whitefly ; virus vector
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Esterase profiles were examined for over 40 populations of the whitefly,Bemisia tabaci, obtained from native and cultivated plant hosts worldwide. Twelve unique electromorphs were identified from distinct populations concentrated largely in Central America, Africa, and India. One electromorph, type B, has recently been proposed as a separate species,Bemisia argentifolii, and has recently spread throughout much of the world. When considered with evidence from mating studies and the ability to induce phytotoxic disorders (squash silverleaf disorder), our data suggest that the single taxonBemisia tabaci may actually represent a species complex.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00553619
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  • 3
    Digitale Medien
    Digitale Medien
    Characterization and distribution of esterase electromorphs in the whitefly,Bemisia tabaci (Genn.) (Homoptera: Aleyrodidae) (1995)
    Springer
    Biochemical genetics 33 (1995), S. 205-214 
    Details
    ISSN: 1573-4927
    Schlagwort(e): Bemisia tabaci ; Bemisia argentifolii ; cotton whitefly ; squash silverleaf disorder ; sweetpotato whitefly ; tobacco whitefly ; virus vector
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Esterase profiles were examined for over 40 populations of the whitefly,Bemisia tabaci, obtained from native and cultivated plant hosts worldwide. Twelve unique electromorphs were identified from distinct populations concentrated largely in Central America, Africa, and India. One electromorph, type B, has recently been proposed as a separate species,Bemisia argentifolii, and has recently spread throughout much of the world. When considered with evidence from mating studies and the ability to induce phytotoxic disorders (squash silverleaf disorder), our data suggest that the single taxonBemisia tabaci may actually represent a species complex.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02401851
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  • 4
    Digitale Medien
    Digitale Medien
    Morphological variation inBemisia endosymbionts (1995)
    Springer
    Protoplasma 189 (1995), S. 194-202 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Bacteria ; Bemisia tabaci ; Bemisia argentifolii ; Endosymbionts ; Microorganism ; Symbiosis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The ultrastructure of the endosymbionts of several populations of whitefly (Homoptera: Aleyrodidae) was examined using transmission electron microscopy. Consistent differences in morphology and relative number of endosymbionts were observed between species and biotypes of whitefly within the Bemisia taxon.Bemisia argentifolii (=B. tabaci B biotype) individuals from Hawaii, Florida, and Arizona contained two morphological types of microorganisms housed within the mycetocyte cells of immature whiteflies. In contrast, individuals from populations ofB. tabaci A biotype from Arizona and Mexico, andB. tabaci Jatropha biotype from Puerto Rico, consistently contained three distinct morphological types of microorganisms within their mycetocytes. Organisms fromB. tabaci A and Jatropha biotypes differed from each other in the relative frequency of each type of microorganism. These observations suggest that different whitefly biotypes may have variable combinations of micro-fauna, with some possibly unique to each group, and furthers the hypothesis that variation in whitefly endosymbionts may be associated with the development of biotypes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01280174
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  • 5
    Digitale Medien
    Digitale Medien
    Glomerular ultrastructure of the trout, Salmo gairdneri (1983)
    Springer
    Cell & tissue research 230 (1983), S. 205-218 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Kidney ; Glomerulus ; Ultrastructure ; Teleosts ; Seawater adaptation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The epithelial ultrastructure of the glomerulus of fresh- and sea-water adapted rainbow trout, Salmo gairdneri was examined by scanning and transmission electron microscopy after in vivo-perfusion fixation. Adaptation to seawater for a period of up to 9 weeks was not associated with a change in glomerular size, although after one year in seawater both glomeruli and their capsules were significantly smaller than the glomeruli of freshwater adapted fish. In freshwater adapted trout the epithelial ultrastructure conformed to the general vertebrate pattern, with rounded podocytes, well-defined primary processes and interdigitating pedicels. Adaptation to seawater was associated with a marked increase in the frequency of cytoplasmic microprojections. In many glomeruli there was a flattening of the podocytes, broadening of the primary processes, and areas of closely-packed pedicels were common. These observations are discussed in the light of previous studies on the mammalian kidney and the changes of single nephron function known to be associated with adaptation of trout to increased environmental salinities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00216040
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