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  • Chemistry  (6)
  • Cytodifferentiation  (2)
  • Hirschsprung's disease  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Interrelation between the spatial disposition of actin filaments and microtubules during the differentiation of tracheary elements in culturedZinnia cells (1988)
    Springer
    Protoplasma 143 (1988), S. 29-37 
    Details
    ISSN: 1615-6102
    Keywords: Actin filament ; Microtubule ; Cytodifferentiation ; Mesophyll cell ; Tracheary element ; Zinnia elegans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Changes in the spatial relationship between actin filaments and microtubules during the differentiation of tracheary elements (TEs) was investigated by a double staining technique in isolatedZinnia mesophyll cells. Before thickening of the secondary wall began to occur, the actin filaments and microtubules were oriented parallel to the long axis of the cell. Reticulate bundles of microtubules and aggregates of actin filaments emerged beneath the plasma membrane almost simultaneously, immediately before the start of the deposition of the secondary wall. The aggregates of actin filaments were observed exclusively between the microtubule bundles. Subsequently, the aggregates of actin filaments extended preferentially in the direction transverse to the long axis of the cell, and the arrays of bundles of microtubules which were still present between the aggregates of actin filaments became transversely aligned. The deposition of the secondary walls then took place along the transversely aligned bundles of microtubules. Disruption of actin filaments by cytochalasin B produced TEs with longitudinal bands of secondary wall, along which bundles of microtubules were seen, while TEs produced in the absence of cytochalasin B had transverse bands of secondary wall. These results indicate that actin filaments play an important role in the change in the orientation of arrays of microtubules from longitudinal to transverse. Disruption of microtubules by colchicine resulted in dispersal of the regularly arranged aggregates of actin filaments, but did not inhibit the formation of the aggregates itself, suggesting that microtubules are involved in maintaining the arrangement of actin filaments but are not involved in inducing the formation of the regularly arranged aggregates of actin filaments. These findings demonstrate that actin filaments cooperate with microtubules in controlling the site of deposition of the secondary wall in developing TEs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282956
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  • 2
    Electronic Resource
    Electronic Resource
    New BETS salts based on magnetic (CuCl3, FeCl4) and non-magnetic (GaCl4) anions (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 7 (1997), S. 57-60 
    Details
    ISSN: 1057-9257
    Keywords: BETS ; salt ; synthesis ; structure ; conductivity ; magnetoresistance oscillations ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: New BETS salts (where BETS is bis(ethylenedithio)tetraselenafulvalene) with (CuCl3)x, Cu2C6, Cu4Cl8 and Fe0.75Ga0.25Cl4 anions have been obtained. The crystal structures and electrical and magnetoresistance properties of Κ-BETS4Cu4Cl8, θ-BETS4Cu2Cl6 and Κ-BETS2Fe0.75Ga0.25Cl4 have been studied. The last two compounds have been found to exhibit Shubnikov-de Haas and angle-dependent magnetoresistance oscillations. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    The effects of substrate surface roughness on the morphology of plasma-polymerized ethylene (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 2199-2203 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070180725
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  • 4
    Electronic Resource
    Electronic Resource
    Reorganization of actin filaments associated with the differentiation of tracheary elements inZinnia mesophyll cells (1987)
    Springer
    Protoplasma 138 (1987), S. 69-71 
    Details
    ISSN: 1615-6102
    Keywords: Actin filament ; Cytodifferentiation ; Mesophyll cells ; Tracheary element ; Zinnia elegans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01281188
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    What are the diagnostic criteria for intestinal neuronal dysplasia? (1995)
    Springer
    Pediatric surgery international 10 (1995), S. 459-464 
    Details
    ISSN: 1437-9813
    Keywords: Intestinal neuronal dysplasia ; Hirschsprung's disease ; Acetylcholinesterase staining ; Diagnostic criteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The incidence of isolated intestinal neuronal dysplasia (IND) has varied from 0.3% to 62% of all suction rectal biopsies in different centres. The uncertainty regarding the incidence has resulted from the considerable confusion regarding the essential diagnostic criteria. In an attempt to clarify the diagnostic criteria for IND, we examined biopsy material from the following three groups using acetylcholinesterase (AChE) histochemistry: (1) full-thickness normal colon from 23 controls; (2) suction rectal biopsies from 9 patients who had isolated IND; and (3) full-thickness biopsies from 10 patients with Hirschsprung's disease (HD) who demonstrated IND in the proximal margin of the resected segment. Our data show that hyperganglionosis is the most consistent finding in both IND associated with HD and isolated IND. Other histochemical criteria of IND were dependent upon whether the biopsy was full-thickness or a suction rectal biopsy. Where full-thickness biopsies were available, giant ganglia and ectopic ganglion cells were seen in all cases. Increases in AChE-positive nerve fibres in the mucosa was a frequent finding in patients with IND diagnosed by suction rectal biopsies. We recommend that patients suspected to have IND on suction rectal biopsy should have a full-thickness biopsy for detailed examination of the submucous and myenteric plexuses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00176387
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  • 6
    Electronic Resource
    Electronic Resource
    Intercellular adhesion molecule-1 (ICAM-1) in the pathogenesis of enterocolitis complicating Hirschsprung's disease (1994)
    Springer
    Pediatric surgery international 9 (1994), S. 237-241 
    Details
    ISSN: 1437-9813
    Keywords: Hirschsprung's disease ; Enterocolitis ; Intercellular adhesion molecule-1 (ICAM-1)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Intercellular adhesion molecule-1 (ICAM-1) is a glycoprotein that is necessary for the transendothelial migration of leucocytes. This study was undertaken to elucidate the role of ICAM-1 in the pathophysiology of Hirschsprung's disease (HD)-related enterocolitis. Ganglionic and aganglionic portions of bowel from 18 patients with HD who did not have clinical or histological evidence of enterocolitis and 5 patients with HD who developed enterocolitis before or after a pull-through operation were stained using monoclonal antibody against ICAM-1. The bowel specimens obtained from 2 children with imperforate anus at the time of colostomy closure and 3 children at the time of bladder augmentation were similarly stained to act as controls. The ganglionic portion of bowel from patients with HD without enterocolitis and controls showed either no ICAM-I staining or occasional staining of the endothelial lining of submucosal vessels with no staining of the glandular crypt epithelium. In contrast, both ganglionic and aganglionic bowel from patients with enterocolitis complicating HD demonstrated strong ICAM-1 staining in the endothelium of submucosal vessels. Strong expression of ICAM-1 in the glandular crypt epithelium was seen in only 2 patients who had developed enterocolitis before pull-through operations. This study illustrates the importance of endothelial cell activation in the pathogenesis of HD-related enterocolitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00832246
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  • 7
    Electronic Resource
    Electronic Resource
    Ring-opening polymerization of glycolide (1967)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 100 (1967), S. 262-266 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1967.021000128
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  • 8
    Electronic Resource
    Electronic Resource
    Physical and chemical characteristics polyglycolide. (1967)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 100 (1967), S. 267-270 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1967.021000129
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  • 9
    Electronic Resource
    Electronic Resource
    Application of glow discharge optical emission spectroscopy to diffusion measurement of copper in ferritic and austenitic iron and steels (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 19 (1992), S. 638-642 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Glow discharge optical emission spectroscopy (GDOS) is a method to analyse the optical emission of elements during sputtering of a solid, providing data on the light intensities of the elements vs. the sputtering time. By correcting the measured light intensities with standard samples, it is possible to obtain the quantitative depth profile up to about 100 μm. In the present research, GDOS was applied to the diffusion measurement of impurity atoms in metals and alloys. After a thin film of copper was coated on iron and steels, the surface film was diffused into the matrix at high temperatures. The penetration curves of copper from the surface were obtained from the GDOS data. Diffusivities of copper in ferritic and austenitic regions of iron were determined from the penetration curves, which were in agreement with previous results. Diffusion of copper in commercial ferritic and austenitic stainless steels was also examined. The diffusivities obtained were comparable with those expected from the temperature dependence of the diffusivities in the ferritic and austenitic phases of pure iron.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.7401901119
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  • 10
    Electronic Resource
    Electronic Resource
    Processing morphology of PVC/MBS blend (1993)
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 15 (1993), S. 51-56 
    Details
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: MBS resin, an impact modifier for PVC, plays an important role in PVC processing, the details of which, however, are not well understood. The use of a temperature programmable Brabender Plasticorder and new microscopic techniques have revealed that MBS inhibits the comminution of PVC grain in the initial stage of processing, and PVC breakdown occurs after the MBS melts. Dynamic melting of MBS is observed as a Brabender torque peak. These characteristics of PVC/MBS blends are quite different from those of PVC/processing aid blends. Processing features of PVC/MBS blends are reported and compared with those of PVC/processing aid blends.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/vnl.730150204
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