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  • Electronic Resource  (5)
  • 1985-1989  (2)
  • 1975-1979  (3)
  • Chemistry  (3)
  • Chromogranin A  (1)
  • proton transfer  (1)
  • Mössbauer spectroscopy
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Material
  • Electronic Resource  (5)
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Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Chromogranin A and B and secretogranin II in bronchial and intestinal carcinoids (1987)
    Springer
    Virchows Archiv 412 (1987), S. 103-109 
    Details
    ISSN: 1432-2307
    Keywords: Carcinoids ; Bronchial carcinoids ; Intestinal carcinoids ; Chromogranin A ; Chromogranin B ; Secretogranin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Carcinoid tumours (bronchial and intestinal) were analyzed by immunoblotting for the presence of chromogranin A, B and secretogranin II. In all tumours an antigen corresponding in electrophoretic behaviour to adrenal chromogranin A was present. Lung carcinoids (3 out of 5) contained a relatively high concentration of a proteoglycan form of this antigen in addition. Chromogranin B was found in all tumours. In one and two dimensional immunoblotting it appeared identical to the corresponding adrenal antigen. Secretogranin II was also present, however concentrations (especially in intestinal carcinoids) were low and variable. Furthermore, in intestinal tumours it differed from the adrenal antigen by having a slightly higher molecular size and a more alkaline pI. Immunohistochemistry revealed that the tumour tissues stained positively for all three antigens. For secretogranin II the staining in intestinal tumours was relatively weak and quite variable. These results should provide a defined basis for immunohistochemical screening of carcinoids for the chromogranin/secretogranin antigens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716181
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Proton transfer reactions in aqueous solutions of pyridoxamine phosphate (1988)
    Springer
    European biophysics journal 16 (1988), S. 219-229 
    Details
    ISSN: 1432-1017
    Keywords: Relaxation kinetics ; ultrasound absorption ; temperature jump ; proton transfer ; vitamin B 6
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract UV-visible and 13C NMR measurements described in the literature and our 31P NMR measurements support the following mechanism of proton transfer reactions in aqueous solutions of pyridoxamine phosphate: Only the tautomeric equilibrium between neutral form, A N, and zwitterion, A Z, which is analogous to the tautomeric equilibrium of 3-hydroxypyridine in aqueous solution, is important, and that equilibrium does not change upon the dissociation of the second phosphate proton. With these simplifying assumption, we have simulated the relaxation spectrum of the proton transfer reactions of pyridoxamine phosphate in water using parameters from analogous reactions and compared it with our ultrasound and temperature jump measurements. We have found that the relaxation process measured by the temperature jump experiment is mainly caused by the overall reaction A N=A Z (or A N - =A Z - ) and the ultrasound absorption at the isoelectric point between pK2 and pK3 is mainly caused by the overall reaction $$A^{\text{ + }} + {\text{x}} A_N^ - + \left( {1 - {\text{x}}} \right)A_Z^ - = {\text{y}}A_N + \left( {2 - {\text{y}}} \right)A_Z , 0 \leqq {\text{x}} \leqq {\text{1,}} {\text{0}} \leqq {\text{y}} \leqq 2$$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261264
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Field desorption mass spectrum of glucagonResearch carried out at Brookhaven National Laboratory under contract with the U.S. Energy Research and Development Administration. (1976)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1976), S. 201-206 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A low resolution, high sensitivity study has been made of the field desorption mass spectrum of glucagon, a 29 amino acid residue underivatized peptide. The highest molecular weight fragments observed, when spectra were taken under conditions which minimized surface reactions of the peptide on the emitter, were found to contain no more than 18 amino acid residues. The most probable fragmentation processes for ions larger than m/e 600 were the production of fragments containing 10, 11 or 12 amino acid residues.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200030502
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  • 4
    Electronic Resource
    Electronic Resource
    On the determination of desorption temperatures in field desorption mass spectrometry (1976)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1976), S. 327-329 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The field desorption temperatures of some compounds are determined by indirect heating of the emitters. The temperatures thus obtained are lower, compared with those determined by other authors. The reasons for this deviation are discussed.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210110314
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Darstellung und röntgenographische Untersuchung des Zinkazidtrihydrates Zn(N3)2 · 3 H2O (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 413 (1975), S. 94-96 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and X-ray Investigation of Zinc Azide TrihydrateZn(N3)2 · 3 H2O has been crystallized from an aqueous solution of zinc azide. Single crystals, which are unstable in air, were investigated my means of x-ray techniques. The lattice parameters are: a = 9.95 Å, b = 5.94 Å, c = 14,30 Å, β = 134.55°, N = 4. Indexd powder pattern are listed.
    Notes: Zn(N3)2 · 3 H2O wurde aus wäßriger Zinkazidlösung hergestellt. Die röntgenographische Untersuchung der an Luft unbeständigen Einkristalle ergab folgende Gitterkonstanten: a = 9,95 Å, b = 5,94 Å, c = 14,30 Å, β = 134,55°, N = 4. Indizierte Pulverdaten wurden tabelliert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754130112
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    Paper (German National Licenses)
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