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  • Polymer and Materials Science  (14)
  • ATP  (2)
  • Cerebellum  (2)
  • Microinjection  (2)
  • lipid fluidity  (2)
  • 1
    Electronic Resource
    Electronic Resource
    ATP as a positive effector of the sodium efflux in single barnacle muscle fibers
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1070 (1991), S. 332-342 
    Details
    ISSN: 0005-2736
    Keywords: ATP ; Barnacle fiber ; Microinjection ; Sodium ion efflux
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(91)90074-I
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  • 2
    Electronic Resource
    Electronic Resource
    Lack of effect on the sodium efflux of the microinjection of d-Ins(1,4,5)P"3 into ouabain-poisoned barnacle muscle-fibers
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1106 (1992), S. 297-302 
    Details
    ISSN: 0005-2736
    Keywords: (Barnacle muscle fiber) ; Microinjection ; Ouabain-poisoned fiber ; Sodium ion efflux ; d-Inositol 1,4,5-triphosphate
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(92)90009-B
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  • 3
    Electronic Resource
    Electronic Resource
    The ability and inability of ATP to stop aluminum from reducing the sodium efflux in unpoisoned barnacle muscle fibers
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1103 (1992), S. 77-84 
    Details
    ISSN: 0005-2736
    Keywords: (Barnacle fiber) ; ATP ; Aluminum ; Sodium ion efflux
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(92)90059-U
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  • 4
    Electronic Resource
    Electronic Resource
    A rare (arteriolo-)capillomedullary venous anomaly of the cerebellum (1996)
    Springer
    Neuroradiology 38 (1996), S. 91-95 
    Details
    ISSN: 1432-1920
    Keywords: Venous angioma ; Cerebellum ; Developmental venous anomaly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A rare (arteriolo-)capillomedullary venous anomaly of the cerebellum was examined with CT, MRI, and angiography. Unlike the usual venous angioma, this case had such extraordinary features as: infratentorial location, involvement of the whole left cerebellum, an arteriolocapillary component and a history of progressive vomiting and chronic constipation in a 7-year-old boy. CT and MRI were consistent with an extensive vascular malformation, but the actual diagnosis was reached by angiography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593233
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  • 5
    Electronic Resource
    Electronic Resource
    A rare (arteriolo-)capillomedullary venous anomaly of the cerebellum (1995)
    Springer
    Neuroradiology 38 (1995), S. 91-95 
    Details
    ISSN: 1432-1920
    Keywords: Key words Venous angioma ; Cerebellum ; Developmental venous anomaly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A rare (arteriolo-)capillo-medullary venous anomaly of the cerebellum was examined with CT, MRI, and angiography. Unlike the usual venous angioma, this case had such extraordinary features as: infratentorial location, involvement of the whole left cerebellum, an arteriolocapillary component and a history of progressive vomiting and chronic constipation in a 7-year-old boy. CT and MRI were consistent with an extensive vascular malformation, but the actual diagnosis was reached by angiography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00593233
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Transmembrane Ca2+ gradient and function of membrane proteins (1995)
    Springer
    Bioscience reports 15 (1995), S. 351-364 
    Details
    ISSN: 1573-4935
    Keywords: Ca2+-ATPase ; cAMP signal transduction ; transmembrane Ca2+ gradient ; lipid fluidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract This review will focus on the recent advance in the study of effect of transmembrane Ca2+ gradient on the function of membrane proteins. It consits of two parts: 1. Transmembrane Ca2+ gradient and sarcoplasmic reticulum Ca2+-ATPase; 2. Effect of transmembrane Ca2+ gradient on the components and coupling of cAMP signal transduction pathway. The results obtained indicate that a proper transmembrane Ca2+ gradient may play an important role in modulating the conformation and activity of SR Ca2+-ATPase and the function of membrane proteins involved in the cAMP signal transduction by mediating the physical state change of the membrane phospholipids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01788367
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of transmembrane Ca2+ gradient on the coupling of β-adrenergic receptors and adenylyl cyclase (1996)
    Springer
    Bioscience reports 16 (1996), S. 327-341 
    Details
    ISSN: 1573-4935
    Keywords: Transmembrane Ca2+ gradient ; β-adrenergic receptors (β-AR) ; stimulatory GTP-binding protein (GS) ; adenylyl cyclase ; lipid fluidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In order to investigate the effect of transmembrane Ca2+ gradient on Gs mediated coupling of β-AR and adenylyl cyclase, β-AR from duck erythrocytes and Gs and adenylyl cyclase from bovine brain cortices were co-reconstituted into asolectin liposomes with different transmembrane Ca2+ gradient. These proteoliposomes were proven to be impermeable to water-soluble substances. The results obtained indicate that a physiological transmembrane Ca2− gradient (1000-fold) is essential for higher stimulation of adenylyl cyclase by hormone-activated β-AR via coupling to Gs and can be further enhanced by the decrease of such Ca2+ gradient within certain range (100 fold) following Ca2+ influx into cells during signal transduction. Fluorescence polarization of DPH revealed that transmembrane Ca2+ gradient modulates adenylyl cyclase and its stimulation by hormones through mediating a change in lipid fluidity. Correspondent conformational changes of β-AR were also detected from the fluorescence spectra and quenching of Acrylodan-labelled β-AR in those proteoliposomes. It is suggested that a proper transmembrane Ca2+ gradient is essential for the optimal fluidity of the phospholipid bilayer in the proteoliposomes, which favors the formation of a suitable conformation of the reconstituted β-AR and thus promotes the stimulation of adenylyl cyclase activities by hormone-activated β-AR via Gs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01855016
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  • 8
    Electronic Resource
    Electronic Resource
    Macromolecular cholesteric order observed by electron microscopy (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 439-445 
    Details
    ISSN: 0887-6266
    Keywords: cholesteric order ; electron microscopy ; periodical lamellar structure ; macromolecules ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The macromolecular cholesteric structure in the ethyl-cyanoethyl cellulose [(E-CE)C]/acrylic acid [AA] cholesteric liquid crystalline solutions is studied by directly observing the morphology and structure of the ethyl-cyanoethyl cellulose [(E-CE)C]/polyacrylic acid [PAA] using electron microscopy. A periodical lamellar structure is observed in ultrathin slices of the composites with cholesteric order by both transmission electron microscopy (TEM) and low-voltage scanning electron microscopy (LVSEM). It is suggested that the periodical lamellar structure is induced by the twist of the molecular orientation in the cholesteric phase and reflects the structural features of the macromolecular cholesteric phase. The macromolecular cholesteric phase exhibits the twisted ring morphology in the initial stage of the formation of the liquid crystalline phase. The swelling of the ultrathin slices with cholesteric order in water is heterogeneous, which suggests the tight packing of the (E-CE)C chains in the direction of the helix axis in the macromolecular cholesteric phase. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 439-445, 1998
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 9
    Electronic Resource
    Electronic Resource
    Formation and textures of ethyl-cyanoethyl cellulose/acrylic acid mesophase (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 50 (1993), S. 607-613 
    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
    Notes: The formation, textures, and optic characteristics of the ethyl-cyanoethyl cellulose [(E-CE)C]/acrylic acid (AA) mesophase were studied using polarizing microscopy, spectro-photometry, and small-angle light scattering (SALS). The disklike, oily streak, planar, pseudoisotropic, polygonal textures and the texture of domains gathered randomly were observed in the mesophase. The polygonal texture in unitary mesomorphic solutions can be regarded as the texture from the combination of deformed mesophase aggregates with the disclike texture. The mesomorphic solution exhibits vivid colors when the concentration is about 42-52 wt % because of its selective reflection to visible light. The wavelength of the light that is selectively reflected shifts to the shorter wavelength, with increasing concentration. © 1993 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070500405
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  • 10
    Electronic Resource
    Electronic Resource
    Preparation and structures of ethyl-cyanoethyl cellulose/cross-linked polystyrene composites (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 54 (1994), S. 533-540 
    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
    Notes: Ethyl-cyanoethyl cellulose [(E-CE)C]/cross-linked polystyrene (PS) composites were prepared via polymerization of styrene in (E-CE)C/styrene solution with glycol diacrylate as a cross-linking reagent. The polymerization of the solution, morphology, and miscibility of (E-CE)C/PS composites were studied with polarizing microscopy, small-angle light scattering (SALS), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). It was found that the mixing state of the (E-CE)C/PS system and the thermal stability of composites were modified by cross-linking of PS. In the intensively cross-linked composite prepared from the anisotropic solution, there existed cylindrical domains in which (E-CE)C spherulites were dispersed in PS. © 1994 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070540503
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