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Qualité des eaux littorales. Etude expérimentale dans un pilote à flux continu de l'évolution des bactéries d'un effluent urbain en milieu marin. Données préliminaires ArchiMer
Martin, Y.; Baleux, B.; Bonnefont, J.l.; Equel, J.c.; Got, P.; Lelong, P.; Tanguy, B.; Trousselier, M..
Des expériences antérieures effectuées dans un pilote expérimental clos avaient permis d'évaluer la vitesse de disparition (T90 ) des entérobactéries d'un effluent urbain dans l'eau de mer. Afin de se rapprocher des conditions du milieu naturel, il convenait de vérifier les résultats obtenus dans un modèle à flux continu de grand volume permettant entre autre d'estimer les effets de l'apport continu d'effluent et d'eau de mer et de faire varier la dilution et la vitesse de passage des germes dans des zones de dilutions successives.
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Ano: 1983 URL: http://archimer.ifremer.fr/doc/00060/17162/14664.pdf
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Numération et approche qualitative des populations bactériennes des lagunes aménagées de Certes (Arcachon). II. Bactéries sulfo-oxydantes photosynthétiques ArchiMer
Baleux, B.; Caumette, P.; Trousselier, M..
Chromatiaceae are unceasing present in the sediment of Certes's lagoons. The genera isolated ares Thiocapsa (80%),Chromatium and Ectothio- rhodospira. From august to October 1977, physical-chemical and bacteriological analysis, in red water present in lagoons, show the Chromatiaceae proliferation and presence of hydrogen sulfide. In October 1977, a study of white water development display the absence of sulphurbacteria and the presence of hydrogen sulfide,carbon dioxide and carbonate. The important role of photo­trophic bacteria in the sulphur cycle are demonstrated by comparison between these waters.
Tipo: Text Palavras-chave: Bactéries phototrophes; Eaux rouges; Eaux blanches; Lagunes; Phototrophic bacteria; Red water; White water; Lagoons.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41678/40887.pdf
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Numération et approche qualitative des populations bactériennes des lagunes aménagées de Certes (Arcachon). I. Bactéries hétérotrophés aérobies ArchiMer
Baleux, B.; Caumette, P.; Trousselier, M..
Numeration, biomass, distribution within time, some physiological characters and a taxonomical outline, with a standardized micro method, of aerobic hétérotrophie bacteria isolated from sediments an waters, from fishponds of "Domaine de Certes" (Arcachon) from june 1977 to may 1978 are described. Number of hétérotrophie bacteria evolved in a significant way, according to seasons, and bacterial biomass is higher in the sediments than in the waters. Metabolic or physiological differences (proteolysis, denitrification) appeared among populations due to the origin of sediments. Moreover the qualitative study pointed out taxonomical units as Bacillus associated to seasons, or Agrobacterium associated to vegetable detritical sediments.
Tipo: Text Palavras-chave: Lagunes; Bactéries hétérotrophes aerobies; Biomasse; Taxonomie; Micro méthode; Enzymatiques; Lagoons; Aerobic heterotrophic bacteria; Biomass; Taxonomy; Enzymatic micro methods.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41677/40886.pdf
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Towards a mathematical model of cellular behaviour of enteric bacteria as affected by marine conditions ArchiMer
Martin, Y.; Bonnefont, Jl; Trousselier, M..
A model of E. coli's responses to marine environmental conditions and resulting cell behaviour has previously been developed. The model considers two kinds of antistress physiological responses and three induced cellular categories with different properties (culturable cells B1, viable but definitively non-culturable cells B2, resuscitable dormant cells B3). Since previous simulations have shown a good correlation with experimental data, we analyse here the effects of some environmental parameters (organic matter, salinity, sunlight) on cellular category dynamics in sea water. Results show that sunlight is the most important factor affecting that dynamics. With the use of two E. coli inocula (log or stationnary phase cells), sanitary implications of the...
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00132/24328/22327.pdf
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