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  • 1
    Electronic Resource
    Electronic Resource
    On the mechanism of the peroxidase-catalyzed oxygen-transfer reaction (1987)
    s.l. : American Chemical Society
    Biochemistry 26 (1987), S. 5019-5022 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00390a020
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of the stable end products and intermediates of oxidative decarboxylation of indole-3-acetic acid by horseradish peroxidase (1984)
    s.l. : American Chemical Society
    Biochemistry 23 (1984), S. 4589-4597 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00315a012
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  • 3
    Electronic Resource
    Electronic Resource
    Mechanism of thyroxine-mediated oxidation of reduced nicotinamide adenine dinucleotide in the peroxidase-hydrogen peroxide system (1977)
    s.l. : American Chemical Society
    Biochemistry 16 (1977), S. 1921-1926 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00628a025
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  • 4
    Electronic Resource
    Electronic Resource
    Spectroscopic evidence for the generation of singlet oxygen in self-reaction of sec-peroxy radicals (1976)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 98 (1976), S. 1974-1975 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00423a060
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  • 5
    Electronic Resource
    Electronic Resource
    Detection of Active Oxygen Species in Biological Systems (1998)
    Springer
    Cellular and molecular neurobiology 18 (1998), S. 565-579 
    Details
    ISSN: 1573-6830
    Keywords: cypridina luciferin analogues ; chemiluminescence ; organ luminescence ; rats ; active oxygen species
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 1. Cypridina luciferin analogues, 2-methyl-6-(p-methoxyphenyl)-3,7-dihydroimidazo[1,2-a]pyrazin-3-one (MCLD) and 2-methyl-6-phenyl-3,7-dihydroimidazo[1,2-a]pyrazin-3-one(CLA), react with O2 − or 1O2 to emit light in visible region. Such chemiluminescences were used for the detection of O2 − or 1O2 in activated leukocyte systems and myeloperoxidase (granulocyte-extract) + Br− + H2O2 systems in vitro. 2. The mechanism of MCLA (CLA)-dependent luminescence is described in detail. Superoxide generated from sinusoidal cells in acute ethanol intoxication of rats was detected by MCLA-dependent luminescence from the surface of perfused rat liver (organ luminescence). 3. Furthermore, with alive animals, O2 − generated in the lung of rats with necrotized pancreatitis and that in the stomach of rats after ischemia/reperfusion were detected by their organ luminescences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020621616389
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of hemin on the conformation of cyanogen bromide-cleaved peptides of apomyoglobin (1982)
    New York : Wiley-Blackwell
    Biopolymers 21 (1982), S. 805-815 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The complexes of the three BrCN-cleaved fragments of sperm whale apomyoglobin with hemin were studied by circular dichroism (CD). In native myoglobin, the heme is located in the middle fragment; the isolated peptide (residues 56-131), however, produces little extrinsic Cotton effects by the addition of hemin, although about four molecules of hemin are bound to this peptide. In marked contrast, the COOH-terminal peptide (residues 132-153), which binds three hemin molecules, shows strong Cotton effects in the Soret bands and drastically changes its conformation from unordered to highly helical. The Arg-modified or Lys-deaminated peptide no longer undergoes conformational changes by the addition of hemin, suggesting that the two propionic acid groups of one hemin molecule interact with the Arg residue and one of the Lys residues, which stabilizes the induced helical conformation. The NH2-terminal peptide (residues 1-55) binds one hemin molecules, and the helicity of this fragment is slightly enhanced by the addition of hemin. Both the CD and difference absorption spectra indicate that the mode of interaction between the peptides and hemin are different for the three apomyoglobin fragments.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360210407
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of carbosilane block copolymers by means of a living anionic polymerization of 1,1-diethylsilacyclobutane (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 2699-2706 
    Details
    ISSN: 0887-624X
    Keywords: poly(1,1-diethylsilabutane) ; block copolymer ; polystyrene ; poly(4-hydroxystyrene) ; poly(methyl methacrylate) ; poly(2-hydroxyethyl methacrylate) ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Block polymerization of 1,1-diethylsilacyclobutane with styrene derivatives and methacrylate derivatives was investigated. Sequential addition of styrene to a living poly(1,1-diethylsilabutane), which was prepared from phenyllithium and 1,1-diethylsilacyclobutane in THF-hexane at -48°C, gave poly(1,1-diethylsilabutane)-b-polystyrene. Similarly, addition of 4-(tert-butyldimethylsiloxy)styrene to the living poly(1,1-diethylsilabutane) provided poly(1,1-diethylsilabutane)-b-poly(4-(tert-butyldimethylsiloxy)styrene). Poly(1,1-diethylsilabutane)-b-poly(methyl methacrylate) was obtained by treatment of living poly(1,1-diethylsilabutane) with 1,1-diphenylethylene followed by an addition of methyl methacrylate. Poly(1,1-diethylsilabutane)-b-poly(2-(tert-butyldimethylsiloxy)ethyl methacrylate) was also synthesized by adding 2-(tert-butyldimethylsiloxy)ethyl methacrylate to the living poly(1,1-diethylsilabutane) which was end-capped with 1,1-diphenylethylene in the presence of lithium chloride. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2699-2706, 1998
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Measurement of rate constants for quenching singlet oxygen with a Cypridina luciferin analog (2-methyl-6-[p-methoxyphenyl]-3,7-dihydroimidazo[1,2-a]pyrazin-3-one) and sodium azide (1991)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 6 (1991), S. 69-72 
    Details
    ISSN: 0884-3996
    Keywords: Singlet oxygen ; Cypridina luciferin analogue ; MCLA ; quenching of singlet oxygen ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: The rate constants for [1O2] [MCLA] and [1O2][NaN3] were measured by quenching the near-infrared emission (1Δg→3∑g) in steady state with MCLA and NaN3, respectively. 1O2 was constantly generated by energy transfer to O2 from Ar laser-excited Rose Bengal. The Stern - Volmer plots yielded the second-order rate constants of 2.94 × 109 M-1 S-1 and 3.83 × 108 M-1 S-1 for quenching 1O2 with MCLA and NaN3 in water at pH 5.4, respectively. The 1O2 + MCLA reaction emitted light with maximum at 465 nm at pD 4.5 identical to the O2- + MCLA reaction.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170060203
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  • 9
    Electronic Resource
    Electronic Resource
    Low-level chemiluminescence during lipid peroxidations and enzymatic reactions (1989)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 4 (1989), S. 231-240 
    Details
    ISSN: 0884-3996
    Keywords: Chemiluminescence ; lipid peroxidation ; peroxidase-catalysed reaction ; chlorpromazine oxidation ; fertilization of sea urchin eggs ; activated leukocytes ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Low-level chemiluminescence during lipid peroxidation and enzymatic reaction have been analysed by a filter type spectrometer. Tyrosine and tryprophan residues in proteins were found to be emitters in the visible region during their enzymatic oxidation. The natural chemiluminescence from fertilization of sea urchin eggs was found to have originated from tyrosine - cation radical mediated reaction in ovo-peroxidase - membrane protein - H2O2 system.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170040133
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  • 10
    Electronic Resource
    Electronic Resource
    Improved preparation of leukocytes for chemiluminescent study of human phagocytic leukocyte-generated reactive oxygen species (1993)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 8 (1993), S. 207-213 
    Details
    ISSN: 0884-3996
    Keywords: Phagocytes ; respiratory burst ; oxygen species ; MCLA ; Dextran-T70 ; chemiluminescence ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Leukocyte oxidative function was investigated in a more physiological milieu than currently used in the chemiluminescence (CL) technique. Heparinized blood was mixed with 6% dextran-T70 (9:1) and the leukocyte-rich plasma obtained without centrifugation was used for the CL experiments (phagocyte count was adjusted to 0.7 × 106/mL with Hanks' buffer) (method A). In this medium, phagocytes responded to stimulation by opsonized zymosan, producing strong luminescence in the presence of 0.5 m̈ mol/L MCLA. CL was inhibited by superoxide dismutase, suggesting that the luminescence reaction was attributable to O2-. Granulocytes were also prepared by the usual method involving centrifugation and were then suspended in plasma (method B). Oxidative function of phagocytes prepared by the two methods was studied together with whole blood as aliquots diluted with Hanks' buffer up to a factor of 1000. Luminescence reached a peak value at a dilution factor of 16, but at very high dilutions luminescence decreased sharply. Significantly higher luminescence values were obtained with samples from method A. Luminescence of whole blood peaked at a dilution factor of 248 but it was less than the value obtained using samples prepared by method A or B. As samples prepared by method A contain all the leukocyte populations, platelets, residual red cells and plasma proteins, the assay of leukocyte-generated reactive oxygens using CL is attained in more physiological conditions than method B in which leukocytes may be damaged owing to repeated centrifugation and hypotonic shock.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170080404
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