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排序方式: 共有108条查询结果,搜索用时 15 毫秒
101.
Tardy Vincent Casiot Corinne Fernandez-Rojo Lidia Resongles Eléonore Desoeuvre Angélique Joulian Catherine Battaglia-Brunet Fabienne Héry Marina 《Applied microbiology and biotechnology》2018,102(5):2413-2424
Applied Microbiology and Biotechnology - Microbial oxidation of iron (Fe) and arsenic (As) followed by their co-precipitation leads to the natural attenuation of these elements in As-rich acid mine... 相似文献
102.
Cardis E Vrijheid M Blettner M Gilbert E Hakama M Hill C Howe G Kaldor J Muirhead CR Schubauer-Berigan M Yoshimura T Bermann F Cowper G Fix J Hacker C Heinmiller B Marshall M Thierry-Chef I Utterback D Ahn YO Amoros E Ashmore P Auvinen A Bae JM Bernar J Biau A Combalot E Deboodt P Diez Sacristan A Eklöf M Engels H Engholm G Gulis G Habib RR Holan K Hyvonen H Kerekes A Kurtinaitis J Malker H Martuzzi M Mastauskas A Monnet A Moser M Pearce MS Richardson DB Rodriguez-Artalejo F Rogel A Tardy H 《Radiation research》2007,167(4):396-416
A 15-Country collaborative cohort study was conducted to provide direct estimates of cancer risk following protracted low doses of ionizing radiation. Analyses included 407,391 nuclear industry workers monitored individually for external radiation and 5.2 million person-years of follow-up. A significant association was seen between radiation dose and all-cause mortality [excess relative risk (ERR) 0.42 per Sv, 90% CI 0.07, 0.79; 18,993 deaths]. This was mainly attributable to a dose-related increase in all cancer mortality (ERR/Sv 0.97, 90% CI 0.28, 1.77; 5233 deaths). Among 31 specific types of malignancies studied, a significant association was found for lung cancer (ERR/Sv 1.86, 90% CI 0.49, 3.63; 1457 deaths) and a borderline significant (P = 0.06) association for multiple myeloma (ERR/Sv 6.15, 90% CI <0, 20.6; 83 deaths) and ill-defined and secondary cancers (ERR/Sv 1.96, 90% CI -0.26, 5.90; 328 deaths). Stratification on duration of employment had a large effect on the ERR/Sv, reflecting a strong healthy worker survivor effect in these cohorts. This is the largest analytical epidemiological study of the effects of low-dose protracted exposures to ionizing radiation to date. Further studies will be important to better assess the role of tobacco and other occupational exposures in our risk estimates. 相似文献
103.
Marie-Hélène Montané Florence Tardy Klaus Kloppstech Michel Havaux 《Plant physiology》1998,118(1):227-235
Barley (Hordeum vulgare L.) plants were grown at different photon flux densities ranging from 100 to 1800 μmol m−2 s−1 in air and/or in atmospheres with reduced levels of O2 and CO2. Low O2 and CO2 partial pressures allowed plants to grow under high photosystem II (PSII) excitation pressure, estimated in vivo by chlorophyll fluorescence measurements, at moderate photon flux densities. The xanthophyll-cycle pigments, the early light-inducible proteins, and their mRNA accumulated with increasing PSII excitation pressure irrespective of the way high excitation pressure was obtained (high-light irradiance or decreased CO2 and O2 availability). These findings indicate that the reduction state of electron transport chain components could be involved in light sensing for the regulation of nuclear-encoded chloroplast gene expression. In contrast, no correlation was found between the reduction state of PSII and various indicators of the PSII light-harvesting system, such as the chlorophyll a-to-b ratio, the abundance of the major pigment-protein complex of PSII (LHCII), the mRNA level of LHCII, the light-saturation curve of O2 evolution, and the induced chlorophyll-fluorescence rise. We conclude that the chlorophyll antenna size of PSII is not governed by the redox state of PSII in higher plants and, consequently, regulation of early light-inducible protein synthesis is different from that of LHCII. 相似文献
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Ultracentrifugal behavior of beef brain S100 protein fraction 总被引:3,自引:0,他引:3
G Vincendon A Waksman K Uyemura J Tardy G Gombos 《Archives of biochemistry and biophysics》1967,120(1):233-235
107.
Clothilde Bertin Corinne Pau-Roblot Josiane Courtois Lucía Manso-Silván Florence Tardy Fran?ois Poumarat Christine Citti Pascal Sirand-Pugnet Patrice Gaurivaud Fran?ois Thiaucourt 《Applied and environmental microbiology》2015,81(2):676-687
Mycoplasmas of the Mycoplasma mycoides cluster are all ruminant pathogens. Mycoplasma mycoides subsp. mycoides is responsible for contagious bovine pleuropneumonia and is known to produce capsular polysaccharide (CPS) and exopolysaccharide (EPS). Previous studies have strongly suggested a role for Mycoplasma mycoides subsp. mycoides polysaccharides in pathogenicity. Mycoplasma mycoides subsp. mycoides-secreted EPS was recently characterized as a β(1→6)-galactofuranose homopolymer (galactan) identical to the capsular product. Here, we extended the characterization of secreted polysaccharides to all other members of the M. mycoides cluster: M. capricolum subsp. capripneumoniae, M. capricolum subsp. capricolum, M. leachii, and M. mycoides subsp. capri (including the LC and Capri serovars). Extracted EPS was characterized by nuclear magnetic resonance, resulting in the identification of a homopolymer of β(1→2)-glucopyranose (glucan) in M. capricolum subsp. capripneumoniae and M. leachii. Monoclonal antibodies specific for this glucan and for the Mycoplasma mycoides subsp. mycoides-secreted galactan were used to detect the two polysaccharides. While M. mycoides subsp. capri strains of serovar LC produced only capsular galactan, no polysaccharide could be detected in strains of serovar Capri. All strains of M. capricolum subsp. capripneumoniae and M. leachii produced glucan CPS and EPS, whereas glucan production and localization varied among M. capricolum subsp. capricolum strains. Genes associated with polysaccharide synthesis and forming a biosynthetic pathway were predicted in all cluster members. These genes were organized in clusters within two loci representing genetic variability hot spots. Phylogenetic analysis showed that some of these genes, notably galE and glf, were acquired via horizontal gene transfer. These findings call for a reassessment of the specificity of the serological tests based on mycoplasma polysaccharides. 相似文献
108.