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'Pentachlorophenol' in keywords
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1992 (1)
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1Author    M. Suwalsky, M. A. Espinoza, M. Bagnara, C. P. SotomayorRequires cookie*
 Title    X-Ray and Fluorescence Studies on Phospholipid Bilayers. IX. Interactions with Pentachlorophenol  
 Abstract    Pentachlorophenol (PCP) is a widely used and highly toxic fungicide. Its toxicity is mainly expressed at the cell membrane level. It is, therefore, o f interest to test its ability to alter the lipid bilayer organization. The present study was performed by X-ray diffraction techniques on dimyristoylphosphatidylethanolam ine (D M PE) and dim yristoylphosphatidylcholine (D M P C) bilayers and by fluorescence on DM PC liposomes. These two phospholipids are re­ spectively found at the inner and outer monolayers o f human erythrocyte membranes. Each type o f phospholipid was made to interact with different concentrations o f the sodium form o f PCP in absence and in presence o f water. It was found that PCP significatively affected the structure o f both phospholipids, being the damage much higher in DM PC bilayers. 
  Reference    Z. Naturforsch. 45c, 265 (1990); received September 18 1989 
  Published    1990 
  Keywords    X -R ay Diffraction, Fluorescence, Phospholipid Bilayers, Pentachlorophenol, Toxicity 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0265.pdf 
 Identifier    ZNC-1990-45c-0265 
 Volume    45 
2Author    Christof Niehrs, Jan AhlersRequires cookie*
 Title    Pentachlorophenol Inhibits Photosynthetic Electron Flow and Quenches Chlorophyll Fluorescence after Preillumination  
 Abstract    The pesticide PCP was shown to inhibit the Hill reaction in broken chloroplasts (I50 = 15 jam) and to quench chlorophyll fluorescence. Both effects require preillum ination. In contrast to the com m on "phenol-type" inhibitors, neither inhibition o f Hill reaction nor chlorophyll fluorescence quench were affected by pretreatm ent of chloroplast with trypsin instead o f preillum ination. An inhibition site differing from the "phenol type" inhibitors is therefore assum ed. The results presented indicate that the observed light requirem ent is due to electron transport through PS II. M easurem ents of intrinsic tryptophane fluorescence phobic environment. 
  Reference    Z. Naturforsch. 41c, 433 (1986); received N ovem ber 4 1985 
  Published    1986 
  Keywords    Photosynthesis, Pentachlorophenol, Chlorophyll F luorescence, H erbicides, Trypsin Treatment 
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 TEI-XML for    default:Reihe_C/41/ZNC-1986-41c-0433.pdf 
 Identifier    ZNC-1986-41c-0433 
 Volume    41 
3Author    Stefan Kremer, Olov Sterner, Heidrun AnkeRequires cookie*
 Title    Degradation of Pentachlorophenol by Mycena avenacea TA 8480 - Identification of Initial Dechlorinated Metabolites  
 Abstract    Cultures o f the basidiomycete M ycena avenacea TA 8480 were shown to m etabolize penta­ chlorophenol (PCP), 2,3,5,6-tetrachloro-/7-hydroquinone (TeCHQ), and 2,3,5,6-tetrachloro-/?-benzoquinone (TeCBQ). The first metabolite o f the PCP degradation pathway was identified as TeCBQ which in a second reaction is reduced to the hydroquinone TeCHQ. Subsequently dechlorination o f TeCHQ yielded 3,5,6-trichloro-2-hydroxy-/?-benzoquinone (TCOHBQ). The specific degradation rate for PCP was 1.4 mg x g dry m ycelia-1 x day-1. The initial de­ chlorination rate o f TeCHQ was 5.9 mg x g dry m ycelia"1 x h o u r '1. N one o f the com pounds supported growth o f the fungus. 
  Reference    Z. Naturforsch. 47c, 561 (1992); received April 1 1992 
  Published    1992 
  Keywords    Basidiomycete, M ycena avenacea, Pentachlorophenol, Dechlorination, 3, 5, 6-Trichloro-2-hydroxybenzoquinone 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0561.pdf 
 Identifier    ZNC-1992-47c-0561 
 Volume    47