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  • 1
    Electronic Resource
    Electronic Resource
    Occurrence and transport of particle ''tetrads'' in the cell membranes of the unicellular red alga porphyridium visualized by freeze-fracture
    Amsterdam : Elsevier
    Journal of Ultrastructure Research and Molecular Structure Research 99 (1988), S. 156-168 
    Details
    ISSN: 0889-1605
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0889-1605(88)90051-1
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Tip-to-base calcium gradients in tip growing plant cells measured by pixe
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 3 (1984), S. 660-663 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(84)90458-0
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  • 3
    Electronic Resource
    Electronic Resource
    242. Nervenverletzungen bei Varicenoperationen (1979)
    Springer
    Langenbeck's archives of surgery 349 (1979), S. 584-584 
    Details
    ISSN: 1435-2451
    Keywords: Varicose vein operations ; Nerve injuries ; Varicenoperationen ; Nervenverletzungen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Verletzung von Hautnerven mit sensiblen Ausfällen unterschiedlichen Ausmaßes ist der häufigste Dauerschaden nach radikalen Varicenoperationen, wie eine Nachuntersuchung von 185 Extremitäten 2 1/2 Jahre p.o. ergab. 38,4% der Extremitäten zeigten nervale Ausfälle. Mit 91,4% lagen die Schäden im Versorgungsgebiet des N. saphenus an der Spitze. Der Verlauf des N. saphenus ist äußerst variabel. In 1/3 der Fälle besteht eine gemeinsame Bindegewebsscheide mit der V. saphena magna. Dies erklärt die Verletzung des Nerven nach Exhairese der Saphena ohne Incisionen am distalen Unterschenkel.
    Notes: Summary Cutaneous nerve injuries with the attendant loss of cutaneous sensation of variable grades are the most frequent permanent injuries of the lower limb after radical varicose vein operation as has been shown from a 2 1/2 year study of 185 operated cases of lower limb varicosities. 38.4% of all cases showed loss of cutaneous sensation. 91.4% of the injuries occurred within the areas supplied by the great saphenous nerve. The course of the saphenous nerve is inconstant and in 1/3 the nerve is enclosed in a common connective tissue bundle with the long saphenous vein. This explains the injuries of the nerve during stripping without incision at the distal end of the lower limb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01729702
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  • 4
    Electronic Resource
    Electronic Resource
    Plasma-membrane “rosettes” are present in the lily pollen tube (1985)
    Springer
    Naturwissenschaften 72 (1985), S. 276-276 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00448693
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  • 5
    Electronic Resource
    Electronic Resource
    Occurrence of particle tetrads in the vacuole membrane of the marine red algae Gigartina teedii and Ceramium rubrum (1985)
    Springer
    Naturwissenschaften 72 (1985), S. 489-490 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00441078
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  • 6
    Electronic Resource
    Electronic Resource
    108. Intraoperative Lokalisation von Steinen in den Gallenwegen mit dem Festkörpersuchgerät (1976)
    Springer
    Langenbeck's archives of surgery 342 (1976), S. 578-578 
    Details
    ISSN: 1435-2451
    Keywords: Calculi, localization of ; Foreign bodies ; detection with audio amplifier ; Steinlokalisation ; Festkörpersuchgerät
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Seit 3 Jahren befindet sich ein Festkörpersuchgerät (Fa. Siemens, Erlangen) zur intraoperativen Steinlokalisation sowie zur Lokalisation von Glassplittern und Metallteilen in Wunden im Handel. Das Gerät wandelt die bei der Berührung von Konkrementen, etc. mit Sonden entstehenden mechanischen Schwingungen in elektrische Spannungsimpulse um und setzt diese in hörbare akustische Signale um/ Bei Choledochusrevisionen ist das Gerät empfehlenswert, ein Verzicht auf die intraoperative Röntgenkontrolle oder zusätzliche Choledochoskopie ist dadurch nicht möglich.
    Notes: Summary For 3 years the firm of Siemens (Erlangen, W. Germany) has been selling an audio amplifier for the localization of calculi and pieces of glass and metal in wounds during surgery. When the apparatus comes into contact with any foreign bodies it transforms mechanical vibrations into electric impulses that are converted in turn to audible acoustic signals. The apparatus is very useful in revision of the common bile duct, but monitoring by X-ray or cholangioscope is still essential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01267455
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  • 7
    Electronic Resource
    Electronic Resource
    Tip cell growth and the frequency and distribution of particle rosettes in the plasmalemma: Experimental studies inFunaria protonema cells (1985)
    Springer
    Protoplasma 127 (1985), S. 222-229 
    Details
    ISSN: 1615-6102
    Keywords: Funaria protonema ; Tip growth ; Cellulose fibril formation ; Particle rosettes ; Plasma membrane ; Incorporation kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary ComparingFunaria protonema tip cells of different age and of experimentally modified growth rate (by changing the light-dark-regime, by application of colchicine and of D2O and by plasmolysis) we found that the site and intensity of growth are related closely to the distribution and frequency of particle rosettes in the PF of the plasma membrane. The results confirm previous suggestions that the rosettes are involved in cellulose fibril formation and that they have a rather short life time (about 10–15 minutes,Reiss et al. 1984). The appearance of rosettes seems to depend on the exocytosis of Golgi vesicle containing wall matrix material. Morphometric calculations suggest that each Golgi vesicle may incorporate one rosette into the plasmalemma in caulonema tip cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276266
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  • 8
    Electronic Resource
    Electronic Resource
    Demonstration of polar zinc distribution in pollen tubes ofLilium longiflorum with the Heidelberg proton microprobe (1983)
    Springer
    Protoplasma 116 (1983), S. 201-203 
    Details
    ISSN: 1615-6102
    Keywords: Lilium ; Pollen tube ; Proton-induced X-ray emission (PIXE) ; The Heidelberg proton microprobe ; Polar zinc distribution ; mRNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The zinc distribution in pollen tubes ofLilium longiflorum was analysed by proton-induced X-ray emission (PIXE) with the Heidelberg proton microprobe. A very high zinc concentration was measured in the pollen tube tip region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279839
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  • 9
    Electronic Resource
    Electronic Resource
    Studies ofNajas pollen tubes. Fine structure and the dependence of chlorotetracycline fluorescence on external free ions (1988)
    Springer
    Protoplasma 142 (1988), S. 25-35 
    Details
    ISSN: 1615-6102
    Keywords: Calcium distribution ; CTC fluorescence ; Najas pollen ; Tip growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of membrane-associated calcium was investigated in pollen grains and tubes of the underwater pollinated angiospermNajas marina L. using chlorotetracycline (CTC). Tubes grown in distilled water (pH 6) showed the highest fluorescence in a subapical region that tapered basally into a fluorescent strand centrally located in the tube and extending back towards the pollen grain. The apical cap had low fluorescence as did the cytoplasm surrounding the fluorescent strand, the tube base and the pollen grain. Tubes grown in different pond waters (pH 8) revealed no intracellular CTC fluorescence. Instead there was an external fluorescence forming a distinct layer around the whole tube, frequently enhanced in a subapical region to form an external collar. Modification of the patterns of fluorescence could be induced by manipulation pH of the growth media and content of specific ions. For example tubes grown in distilled water with 10−3 M Mg2+ salts showed a similar CTC fluorescence as those grown in pond water. In contrast, Ca2+ enrichment had no visible influence on the patterns of fluorescence. The pattern of fluorescence displayed by tubes grown in distilled water, could be reproduced in pond water if the pH was artificially reduced to pH 6. Ultrastructurally, there was no detectable difference in the markedly polar distribution of organelles between pollen tubes grown in the various growth media. The secretory vesicles found in the pollen grain prior to germination become distributed throughout the pollen tube but are least concentrated in regions that show highest internal CTC fluorescence. These regions appear to have large amounts of endoplasmic reticulum and include mitochondria. These results are discussed in relation to the significance of calcium gradients for tip growth and limitations in the use of CTC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01273223
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  • 10
    Electronic Resource
    Electronic Resource
    Distribution of elements in the lily pollen tube tip, determined with the Oxford scanning proton microprobe (1985)
    Springer
    Protoplasma 126 (1985), S. 147-152 
    Details
    ISSN: 1615-6102
    Keywords: Elemental map ; Lilium ; Oxford proton microprobe ; Scanning proton microprobe ; Proton induced X-ray emission ; Pollentube
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pollen tubes ofLilium longiflorum were fixed with glutaraldehyde and investigated unsectioned with the Oxford scanning proton microprobe (SPM). Two-dimensional maps which show the distribution and concentration of phosphorus, sulphur, chlorine, potassium, calcium, iron, copper, zinc and arsenic are presented. The maps show that, within the pollen tube tip region, calcium and zinc exhibit relatively steep longitudinal concentration gradients compared to the more flat distributions of phosphorus and sulphur. Chlorine, potassium, iron and copper appear equally distributed along the tube. All elements with the expception of arsenic show the highest concentration within the cell protoplasm and not in the cell wall. Additional signals of arsenic, chlorine and potassium originate from the remaining fixative dried around the tube, containing also the free ions of the cell. The arsenic signals originate exclusively from the buffer used during fixation. The different maps are compared and discussed in relation to their significance to the pollen tubes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287681
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