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  • 1
    Electronic Resource
    Electronic Resource
    Thin Film Waveguide Sensor for Measurement of the Absorption Coefficient of Hemoglobin Derivatives (1998)
    Springer
    Optical review 5 (1998), S. 257-261 
    Details
    ISSN: 1349-9432
    Keywords: waveguide ; evanescent field ; hemoglobin ; optical sensor ; thin film
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A simple method for determining the absorption coefficient of oxyhemoglobin and deoxyhemoglobin in human blood is proposed. The method is based on a variation of the complex propagation constant of guided wave in a thin-film optical waveguide. On the waveguide layer, a serial multi-channel sample chamber is constructed to vary the interaction length between the evanescent field and the sample, and the dependence of the sensor response on the interaction length is investigated for various concentrations of two hemoglobins. The response of this sensor is linearly proportional to the interaction length and the concentration of the two hemoglobins. The attenuation constant due to the evanescent field absorption between the channels is experimentally obtained with the designed sensor, and the absorption coefficient is determined by the proposed method. The determined absorption coefficients coincided with those obtained by conventional transmission measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-998-0257-8
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  • 2
    Electronic Resource
    Electronic Resource
    Mutant regulatory subunit of 3′,5′-cAMP-dependent protein kinase of yeast Saccharomyces cerevisiae (1987)
    Springer
    Molecular genetics and genomics 210 (1987), S. 413-418 
    Details
    ISSN: 1617-4623
    Keywords: Saccharomyces cerevisiae ; cAMP-dependent protein kinase ; Regulatory subunit ; Site-directed mutagenesis ; Phosphorylation site
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Four mutants with amino acid substitution(s) at or near the putative phosphorylation site (Arg142 Arg143 Thr144 Ser145) of the regulatory subunit of cAMP-dependent protein kinase were obtained by site-directed mutagenesis. Three mutants, BCY1 Ala 145 (Ser145 to Ala), BCY1 His 143 (Arg143 to His) and BCY1 Asn 144, Ala 145 (Thr144 to Asn and Ser145 to Ala) complemented a bcy1 mutant, whereas BCY1 Gly 143 (Arg143 to Gly) did not. In addition, mutant, BCY1 Asn 144, Ala 145 exhibited a dominant coldsensitive phenotype, which can be most easily explained by the functional alteration of the regulatory subunit of cAMP-dependent protein kinase by the mutations. Analyses of these mutant genes revealed that phosphorylation of the regulatory subunit is not a prerequisite for the regulation of the cAMP-dependent protein kinase activity in responding to the cAMP level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327191
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