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1Author    P. Kierzkowski, B. Pranszke, A. Kowalski, M. MenzingerRequires cookie*
 Title    Electronic Energy Partitioning in the Reactions of Metastable Mg*( 3 Pj) Atoms with F 2 , Cl 2 , Br 2 ,1 2 , IC1, IBr  
 Abstract    Chemiluminescent reactions of metastable Mg*(3 Pj) atoms with F 2 , Cl 2 , Br 2 , I 2 , IC1, IBr molecules were studied in a beam-gas experiment. For all homonuclear targets the MgX(A 2 FI -X 2 X +) emission was observed, but for IC1 and IBr reactants the Mgl(A-X) emission was absent and only MgCl(A-X) or MgBr(A-X) spectra were found. In addition, for the I 2 , IBr, IC1, Br 2 reactions, broad pseudocontinua extend from above 400 nm into the infrared. These pseudocontinua are ten-tatively attributed to the Mgl, MgBr (B' 2 Z + -X 2 Z +) transition. The total attenuation cross sections, chemiluminescence cross sections and quantum yields were measured. The quantum yields are all below 5%. The results are analyzed using information theory. The low yields for the Mg* + F 2 system are explained by a barrier in the entrance channel. For other reactions the low yields are most probably caused by predissociation of the MgX*(A 2 n) products. 
  Reference    Z. Naturforsch. 55a, 433—140 (2000); received November 26 1999 
  Published    2000 
  Keywords    Chemiluminescence, Energy Transfer, Atomic Collisions, Molecular Collisions, Luminescence 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0433.pdf 
 Identifier    ZNA-2000-55a-0433 
 Volume    55 
2Author    Joachim Staufif, Wolfgang JaeschkeRequires cookie*
 Title    Chemilumineszenz der S02-Oxidation Chemiluminescence of SO2-Oxidation  
 Abstract    The reactions of diluted aqueous solutions of SO2 resp. HSO3-ions with MJ1O4-or Ce 4+ ions in the pH range 1-4 produce chemiluminescence in the spectral region of 450-600 nm. Measurements of the time course of the light emission and their simulation on an analog computer led to a reaction scheme in which a recombination product of primarily formed HSO3 radicals -of a lifetime of about 1 second -appears as precursor of electronically excited SO2 molecules. The participation of singlet oxygen can be excluded because at least the reaction with Ce 4+ ions proceeds also in the absence of oxygen. 
  Reference    Z. Naturforsch. 33b, 293—299 (1978); eingegangen am 30. September/12. Dezember 1977 
  Published    1978 
  Keywords    Sulfur Dioxide, Oxidation, Chemiluminescence, Reaction Kinetics, Analysis 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0293.pdf 
 Identifier    ZNB-1978-33b-0293 
 Volume    33 
3Author    Cornelia Neidl, Joachim StauffRequires cookie*
 Title    Spectra and Decay Kinetics of Diadamantyl-Dioxetane Chemiluminescence  
 Abstract    The thermal decomposition of 1,2-diadamantyldioxetane was studied by kinetic and spectroscopic methods. Spectra of the chemiluminescence emitted during the thermally induced decomposition of 1,2-diadamantyldioxetane, tetramethyldioxetane and tri-methyldioxetane were obtained and the influence of quenchers and radical-scavengers, and the presence of "heavy atoms" in the surrounding of the emitting species was investigated. The kinetics of the decay mechanism was followed by measuring the time dependence of the chemiluminescence. The influence of radical-scavengers, quenchers and "external heavy atoms" on the kinetics was assessed. Experimental results were discussed in terms of a biradical decay mechanism. 
  Reference    Z. Naturforsch. 33b, 763—769 (1978); received January 26 1978 
  Published    1978 
  Keywords    Chemiluminescence, Dioxetanes, Reaction Kinetics, Spectra, Biradicals 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0763.pdf 
 Identifier    ZNB-1978-33b-0763 
 Volume    33 
4Author    Iren, K. Ruk, K. Rzysztof, L. Ichszteld, T. Eresa, M. IchalskaRequires cookie*
 Title    Evidence for the Generation of Singlet Molecular Oxygen during Dopa and Dopamine Peroxidation  
 Abstract    Participation of singlet molecular oxygen (' 0 2) in peroxidation of dopa and dopamine was studied by measurements of chemiluminescence spectra, the influence of solvents with various lifetime of 0 : ('Ag) and 0 2 ('A g)-quenchers on quantum yield of chemiluminescence. A decrease of absorption and fluorescence intensities of 1,3-diphenylizobenzofuran (DPBF) was also studied in the presence of dopa and dopamine oxidized with alkaline H:0 2 as a criterion for the involvement of '0 2. 
  Reference    Z. Naturforsch. 44c, 39 (1989); received July 18/October 10 1988 
  Published    1989 
  Keywords    Dopa, Dopamine, Singlet Molecular Oxygen, Chemiluminescence 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0039.pdf 
 Identifier    ZNC-1989-44c-0039 
 Volume    44 
5Author    Z. Czuba, W. Krol, S. Scheller, J. ShaniRequires cookie*
 Title    Effect of Cinnamic and Acrylic Acids' Derivatives on Luminol-Enhanced Chemiluminescence of Neutrophils  
 Abstract    Fourteen derivatives o f cinnamic and acrylic acids were evaluated for their ability to modu­ late chemiluminescence, evoked by neutrophils that had been exposed to luminol and phorbol-myristate-acetate. Compounds with one or two hydroxyl groups on the phenyl ring demon­ strated significant inhibition o f the chemiluminescence, but this inhibition was diminished by methoxylation. Saturation of the double bond in the aliphatic chain of cinnamic acid at C6 -enhanced the chemiluminescence to a small degree. All three acrylic acid derivatives demon­ strated a marked inhibition of the luminol chemiluminescence, indicating that characteristics of the heterocyclic ring is of utmost importance in this activity. 
  Reference    Z. Naturforsch. 47c, 753—756 (1992); received March 25/May 25 1992 
  Published    1992 
  Keywords    Chemiluminescence, Luminol, Cinnamic Acid, Acrylic Acid, Neutrophils 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0753.pdf 
 Identifier    ZNC-1992-47c-0753 
 Volume    47 
6Author    W. Krol, J. Shani1, Z. Czuba, S. SchellerRequires cookie*
 Title    Modulating Luminol-Dependent Chemiluminescence of Neutrophils by Flavones  
 Abstract    The effect o f 14 flavones on luminol-dependent chemiluminescence o f neutrophils was stud­ ied in vitro. Chemiluminescence was used in this study as an indicator for the production o f a reactive oxygen species by neutrophils, stimulated by phorbol myristate acetate. While fla-vone-8-acetic acid, and most o f the com pounds tested, inhibited chemiluminescence, flavone and its 5-hydroxy-7-methoxy derivatives enhanced it by up to 150%. The m ost active inhibi­ tors o f photon emission were the glycosides. These results indicate that lipophilicity and some structural determinants modulate the chemiluminescent capacity o f neutrophils. 
  Reference    Z. Naturforsch. 47c, 889—8 (1992); received September 11 1992 
  Published    1992 
  Keywords    Chemiluminescence, Luminol, Radical Scavenging, Flavones, Neutrophils 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0889.pdf 
 Identifier    ZNC-1992-47c-0889 
 Volume    47 
7Author    M. Arow Icz3, B. Arbara, R. AabRequires cookie*
 Title    Antioxidative Activity of Leguminous Seed Extracts Evaluated by Chemiluminescence Methods  
 Abstract    The antioxidant properties of extracts from seeds of white bean, pea, lentil, everlasting pea, faba bean, and broad bean were investigated by enhanced chemilumi­ nescence (ECL) and photochemiluminescence (PCL) methods. All extracts exhibited antioxidative activity. The antioxidative efficacy of the extracts investigated varied markedly and did not dependent upon their content of phenolic compounds. Results of TLC analysis of the extracts indicated that the antioxidant activity originated from several phenolic compounds, partly sim­ ilar in their polarity. 
  Reference    Z. Naturforsch. 52c, 709—712 (1997); received March 5/July 21 1997 
  Published    1997 
  Keywords    Leguminous Seed Extract, Antioxidative Activity, Free Radical Scavengers, Chemiluminescence 
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 TEI-XML for    default:Reihe_C/52/ZNC-1997-52c-0709_n.pdf 
 Identifier    ZNC-1997-52c-0709_n 
 Volume    52 
8Author    BeateM. EierRequires cookie*
 Title    Superoxide Release in Human Fibroblasts upon Treatment with Culture Supernatants of the Arthritogenic Bacteria Erysipelothrix rhusiopathiae and Mycoplasma arthritidis  
 Abstract    Culture supernatants of the arthritogenic bacteria Mycoplasma pneum onia, M ycoplasm a arthritidis, Borrelia burgdorferi and Erysipelothrix rhusiopathiae stimulated primary cultures of human fibroblasts to release reactive oxygen species into the environment, whereas cell walls and membranes of these bacteria had no effects. Lipopolysaccharides of various gram-negative bacteria and lipid A , the lipid moiety of endotoxines, also failed to stimulate the release of reactive oxygen species by fibroblasts. The stimulatory fractions of the culture supernatants of M ycoplasma arthritidis and E rysip­ elothrix rhusiopathiae exhibited a molecular weight of about 9.5 kDa. After an induction period of 5 min the presence o f the stimulant was not necessary any more. The primary radical released by the fibroblasts was the superoxide anion 0 2'. Radical formation took place continuously over som e hours. Additionally, low-level chemiluminescence of fibroblasts was increased upon stimulation with culture supernatants of M ycoplasm a arthritidis and E ry­ sipelothrix rhusiopathiae. N o irreversible injury o f the fibroblast was caused upon stimulation and the cells exhibited normal proliferation pattern after replacing them to the culture medium. pathiae T28 and Mycoplasma arthritidis I SRI, which serve as a model for rheum atoid arthritis in man (Ajmal, 1970; Cole et al., 1972; Drews, 1972; Schulz, 1980; Schulz et al., 1974; Sikes, 1959). E ry­ sipelothrix rhusiopathiae is a small, gram-positive non mobile coccobacillus causing a chronic arthri­ tis in pigs and rats (Ward, 1922), which has an increasing interest due to its similarities to rheu­ matoid arthritis in man. Beside this pathogenicity it induces natural infections in a wide range of ani­ mals and men (Schulz, 1974; Ajmal, 1969). Mycoplasma arthritidis is the causative agent of arthritis in rats and mice and as Erysipelothrix ar­ thritis represent animal models for rheum atoid ar­ thritis in man (Cole et al., 1971). Mycoplasma are small bacteria lacking a cell wall. Some species posses oligosaccharide chains bound to diglyceride (lipoglycan), which are soluble in organic solvents (Seid et al., 1980). Like the lipopolysaccharides (LPS) of gram negative bacteria they have endo­ toxin-like activities (Razin, 1978). The mem branes of Mycoplasma arthritidis are described to lack these lipoglycans (Razin, 1978). It is unknown whether lipoglycans or cell m em branes of Myco-0939-5075/98/0300-0254 $ 06.00 © 1998 Verlag der Zeitschrift für Naturforschung. All rights reserved. 
  Reference    Z. Naturforsch. 53c, 254 (1998); received D ecem ber 19 1997/February 3 1998 
  Published    1998 
  Keywords    Human Fibroblasts, Superoxide Production, Chemiluminescence, Lipopolysaccharide, Arthritogenic Bacteria 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0254.pdf 
 Identifier    ZNC-1998-53c-0254 
 Volume    53 
9Author    B. Pranszke, P. Kierzkowski, A. KowalskiRequires cookie*
 Title    A Search for Isotope Effects in Chemiluminescent Reactions of Metastable Ca*( 3 Pj, *D 2 ) Atoms with CH 3 I and CD 3 I Molecules  
 Abstract    Chemiluminescent reactions of calcium atoms in the metastable Pj and 'D, states with CH 3 I and CD 3 I were studied in a beam-gas arrangement. Calcium monoiodide spectra associated with transitions from the electronic A IT, B 2 Z + and C 2 n states to the X 2 L + ground state were recorded. Total collision and chemiluminescence cross sections were measured. It was found that isotopic substitution in the methyl group does not change the reaction cross sections and the chemiluminescence spectra. 
  Reference    Z. Naturforsch. 54a, 191—194 (1999); received February 2 1999 
  Published    1999 
  Keywords    Chemiluminescence, Energy Transfer, Atomic Collisions, Molecular Collisions, Isotopic Effect 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0191.pdf 
 Identifier    ZNA-1999-54a-0191 
 Volume    54 
10Author    JürgenA. Rnhold11, OlegM. Panasenkob, Jürgen Schiller1, Klaus Arnold3, YurijA. Vladimirovb, Valeri, I. SergienkobRequires cookie*
 Title    Reaction of Hypochlorous Acid with Hydrogen Peroxide and tert-Butyl Hydroperoxide. *H NMR Spectroscopy and Chemiluminescence Analyses  
 Abstract    In contrast to the well-known reaction o f hypochlorous acid with hydrogen peroxide, no singlet oxygen is formed as the result o f reaction between hypochlorous acid and fm -butyl hydroperoxide. The reaction with hydrogen peroxide yielded a quadratic dependence of light intensity on reactant concentration, a drastic enhancement of luminescence yield using D 20 as solvent and only an em ission of red light, that are typical characteristics of emission result­ ing from two molecules of delta singlet oxygen. Other chemiluminescence properties were observed using tert-butyl hydroperoxide. There was a linear dependence of light intensity on reactant concentration using rm-butyl hydroperoxide in excess with a decline of emission at higher concentrations. 'H-NM R spectroscopic analysis revealed di-rm-butyl peroxide, fm -butanol and also rm-butyl hypochlorite, acetone and acetate as products of the reaction between hypochlorous acid and fm -butyl hydroperoxide. The formation of di-rm-butyl peroxide is only possible assuming a re/Y-butyloxy radical as primary intermediate product of this reaction. Our results demonstrate that alkoxy radicals derived from organic hydroperoxides can participate in lipid peroxidation induced by hypochlorous acid. On the other hand, singlet oxygen did not influence the yield of peroxidation products. Changing H 20 for D 20 in suspension of egg yolk phosphaditylcholine no differences in accumulation of thiobarbituric acid reactive products were observed. 
  Reference    Z. Naturforsch. 51c, 386—3 (1996); received January 26/February 27. 1996 
  Published    1996 
  Keywords    Hypochlorous Acid Hydrogen Peroxide, tert-Butyl Hydroperoxide, Singlet Oxygen Free Radicals, 'H NM R Spectroscopy, Chemiluminescence 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0386.pdf 
 Identifier    ZNC-1996-51c-0386 
 Volume    51