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  • 1H NMR secondary references  (1)
  • 1H-13C COSY NMR  (1)
  • Amino acid and amino-acid synthesis  (1)
  • Cardiac conduction disorders  (1)
  • 1985-1989  (4)
Collection
Keywords
Publisher
Years
  • 1985-1989  (4)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Amino-acid biosynthesis in the cotyledons of Sinapis alba L. in darkness and far-red light studied by deuterium labelling and mass spectrometry (1985)
    Springer
    Planta 165 (1985), S. 561-568 
    Details
    ISSN: 1432-2048
    Keywords: Amino acid and amino-acid synthesis ; Phytochrome (synthesis) ; Sinapis (amino acid, phytochrome)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The incorporation of deuterium from deuterium oxide into the free amino acids of the cotyledons of Sinapis alba L. was studied by gas chromatography-mass spectrometry and was similar, both qualitatively and quantitatively, after incubation of the seedlings in darkness or far-red light. The results support studies which show that phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) is synthesised de novo, rather than activated, in response to far-red light.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00398104
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Clinically relevant computer model of cardiac rhythm and pacemaker/heart interaction (1987)
    Springer
    Medical & biological engineering & computing 25 (1987), S. 504-512 
    Details
    ISSN: 1741-0444
    Keywords: Biomedical computation ; Cardiac conduction disorders ; Discrete event simulation ; Heart rate dependence ; Heart rhythm model ; Pacemaker models ; Simulated electrocardiogram ; Simulation process
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A computer simulation model of cardiac rhythm disturbances and of the heart/pacemaker interaction has been created and implemented on a NORD-100 minicomputer. The model incorporates important properties including cycle length dependence of the refractory periods of different parts of the heart and of the atrioventricular nodal conduction speed. Computational experiments produce an explicit timetable of polarisation changes, a simulated one-channel electrocardiographic record and a pacemaker marker channel. The simulation program is written infortran and uses discrete event simulation techniques. The heart is modelled using instances of nine simulation process prototypes. The paper presents and discusses several examples in the form of simulated electrocardiographic records and the results show that the model is clinically relevant. Included in the examples are the modelling of rhythm disturbances, pacemaker actions, pacing for tachycardia prophylaxis and atrioventricular nodal conduction disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441742
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  • 3
    Electronic Resource
    Electronic Resource
    Temperature dependence of NMR secondary references for D2O and (CD3)2SO solutions (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 523-525 
    Details
    ISSN: 0749-1581
    Keywords: 1H NMR secondary references ; 13C NMR secondary references ; Temperature dependence ; D2O solutions ; (CD3)2SO solutions ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chemical shifts of secondary references for D2O and (CD3)2SO solutions were measured as a function of temperature. The 1H and 13C chemical shifts of dioxane, sodium 4,4-dimethyl-4-silapentanesulphonate, HOD, tetramethylammonium chloride and sodium 3-(trimethylsilyl)propionate-d4 in D2O solution were measured relative to external TMS and the chemical shifts of (CD3)2SO and H2O were measured in (CD3)2SO solution relative to internal TMS. For accurate comparison of chemical shifts it is necessary to take into account the sample temperature and, therefore, the temperature dependences of 1H and 13C chemical shifts of a number of secondary references have been determined accurately and fitted to a parabola or straight line, as appropriate.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260260617
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  • 4
    Electronic Resource
    Electronic Resource
    1H and 13C NMR assignment of maltitol by a combination of 2D NMR and H/D isotope effects on nuclear shielding (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 425-429 
    Details
    ISSN: 0749-1581
    Keywords: Maltitol ; 13C NMR assignment ; 2D-INADEQUATE ; SIMPLE NMR ; DIS NMR ; 1H NMR assignment ; 1H-13C COSY NMR ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Maltitol was assigned unequivocally without any need for reference to model compounds by a combination of 2D, SIMPLE (secondary isotope multiplets of partially labelled entities) and DIS (differential isotope shift) NMR techniques. The combination of these three techniques is very powerful for the assignment of molecules with many exchangeable hydrogen atoms, such as carbohydrates. In the case of maltitol a complete 13C NMR assignment was achieved in three solvents [H2O, D2O and (CD3)2SO] using three experiments. A 1H-13C 2D correlation experiment allowed the 1H NMR spectrum to be assigned unequivocally for the first time.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260260514
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