Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 46 (1974), S. 12-15 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 22 (1974), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— For the GABA shunt to operate in rivo, GABA must be able to enter brain mitochondria. GABA causes reduction of intra-mitochondrial NAD+; glutamate or 2-oxoglutarate stimulate this reduction at concentrations at which they do not themselves cause reduction. This stimulation is not abolished by Triton X-100. The rates of swelling of brain and liver mitochondria are similar in iso-osmotic GABA and in several analogues. The rate of swelling is proportional to the concentration of GABA in the iso-osmotic suspension medium. GABA penetrates 60% of the mitochondrial matrix volume, this value is unaffected by energizing the mitochondria. The activity of GABA-oxoglutarate aminotransferase is not latent. We conclude that GABA diffuses into both brain and liver mitochondria as a species with no net charge at rates which are able to sustain maximum activity of the GABA shunt.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Radiation and environmental biophysics 7 (1971), S. 146-151 
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Description / Table of Contents: Zusammenfassung Untersuchungen an thermischen Polymeren vonα-Aminosäuren in festem Zustand zeigen, daß in diesen insbesondere Tryptophan, Histidin, Cystin, Lysin und Methionin eine höhere Strahlenempfindlichkeit als in den bisher untersuchten Proteinen aufweisen. Diese Ergebnisse werden verglichen mit ähnlichen Untersuchungen an Filmen von Aminosäuremischungen, die in noch stärkerem Umfang auf einen beträchtlichen Energietransfer oder Chargetransfer in Richtung auf die vier genannten Aminosäuren schließen lassen. Die Ergebnisse werden auch in Hinsicht auf die Strahlenempfindlichkeit von Aminosäuren in Proteinen und auf die Inaktivierung von Enzymen diskutiert.
    Notes: Summary Irradiation of thermal polymers ofα-amino acids with X-rays in the solid state produces a significantly increased destruction of tryptophan, histidine, cystine, lysine and methionine as compared with the response of constituent amino acids in proteins. These results are discussed with respect to related results obtained by irradiation of dry films of amino acid mixtures which indicate an even stronger energy or charge transfer towards the four amino acids mentioned. The results are also discussed with respect to the radiation sensitivity of constituent amino acids in proteins and the inactivation of enzymes.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Radiation and environmental biophysics 7 (1971), S. 140-145 
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Description / Table of Contents: Zusammenfassung Die Photosensibilität des Cystins und der aromatischenAminosäuren Tryptophan, Tyrosin and Phenylalanin in verschiedenen Proteinen, in wäßriger Lösung und in adsorbiertem Zustand wurde mit der Photoempfindlichkeit dieser Aminosäuren in thermischen Polymeren von Aminosäuren verglichen. In Abwesenheit von chromophoren Gruppen ist die Photosensibilität des Cystins weitgehend unabhängig von Aminosäurezusammensetzung, Primärstruktur oder Konformation des Polymeren. Die Wechselwirkung zwischen „Sensibilisator“ (meist aromatischen Aminosäuren) und Cystin ist nur konformationsabhängig, wenn Energie- oder Charge-Transferprozesse beteiligt sind. Die Wirkung der Photolyseprodukte des Tryptophans (solvatisierter Elektronen) scheint dagegen weitgehend unabhängig von der Konformation zu sein.
    Notes: Summary The photosensitivity of cystine and the aromatic amino acids tryptophan, tyrosine and phenylalanine in different proteins, in aqueous solution and in the adsorbed (solid) state is compared with the photosensitivity of these amino acids in thermal polymers ofα-amino acids. The photosensitivity of cystine in the absence of chromophoric groups is largely independent of the amino acid composition, primary structure, or conformation of the polymer. The interaction between the “sensitizer” (aromatic amino acid residues), and cystine, however, is largely dependent on the conformation of the polymer if energy or charge transfer is involved. The effects of tryptophan photolysis products (solvated electrons) appear to be largely independent of the conformational state.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...