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  • 1
    ISSN: 1432-0738
    Keywords: Key words Artificial antigen ; Competitive inhibition enzyme immunoassay ; Sarin ; Detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Two artificial antigens, N α N ɛ-di(O, O-diisopropyl) phosphoryl L-lysine (DIP)- bovine serum albumin (BSA) conjugate (DIP-BSA) and DIP-KLH (keyhole limpet hemocyanin), were synthesized. Antibodies against sarin (O-isopropyl methylphosphonofluoridate) were obtained after immunization of rabbits with DIP-KLH conjugate. A competitive inhibition enzyme immunoassay (CIEIA) was developed to detect the organophosphorus nerve agent sarin. The antibody solutions could be inhibited by sarin as low as 10-6 mol/l, and the standard curve was linear over 3 orders of magnitude. The coefficients of intraassay and interassay variation of this method were 5.4–6.2% (n=11) and 8.0–9.5% (n=6) at a sarin concentration range of 10-3–10-6 mol/l, respectively. The recovery of sarin in water samples at the concentration of 5×10-5 mol/l was in the range of 96.8–102.5%. The specificity of the antiserum was assessed by comparing the inhibition induced by sarin with soman, Vx, isopropyl alcohol and isopropyl methyl phosphonic acid. The results showed that less than 5 mmol/l soman, 2 mmol/l Vx, 16 mmol/l isopropyl alcohol and 8 mmol/l isopropyl methyl phosphonic acid did not influence the determination of sarin in water samples.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1075-4261
    Keywords: doxorubicin ; intercalation ; resonance Raman ; SERRS ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Physics
    Notes: The interactions of doxorubicin and its derivatives, hydroxyrubicin and adriamycinone, with DNA were studied by resonance Raman (RR) and surface-enhanced resonance Raman scattering (SERRS) spectroscopy. The π-π interaction between the chromophore of the drug and DNA base pairs has been shown to downshift the skeletal stretching mode ∼ 1440 cm-1 by 8, 5, and 4 cm-1 for doxorubicin, hydroxyrubicin, and adriamycinone, respectively. The additional effects of intercalation with DNA on the RR and SERRS spectra for hydroxyrubicin are similar to those for doxorubicin. However, different effects are observed for adriamycinone. These results indicate that the sugar moiety is necessary to maintain the maximum van der Waals contact between the chromophore and the DNA base pairs and that the amine group in the amino sugar is more favored than the hydroxyl group. © 1997 John Wiley & Sons, Inc. Biospectroscopy 3: 307-316, 1997
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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