Glyphosate and glufosinate-based herbicides: fate in soil,transfer to,and effects on land snails     

Coline Druart  Maurice Millet  Renaud Scheifler  Olivier Delhomme  Annette de Vaufleury 《Journal of Soils and Sediments》2011,11(8):1373-1384

Purpose  

The aim of this work was to assess the transfer and effects of two widely used herbicides on the land snail Helix aspersa during long-term exposure under laboratory conditions.  相似文献   

Treatment of prolapsed gland and cartilage deformity of the nictitating membrane with pocket technique and chondrectomy alone,or combined with a wedge conjunctivectomy: 132 dogs (1998‐2018)     

Julien Michel  Patrick Lazard  Marie Vigan  Olivier Albaric 《Veterinary ophthalmology》2020,23(2):305-313

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A New,Quick, and Simple Protocol to Evaluate Microalgae Polysaccharide Composition     

Antoine Decamp  Orane Michelo  Christelle Rabbat  Cline Laroche  Dominique Grizeau  Jrmy Pruvost  Olivier Gonalves 《Marine drugs》2021,19(2)

In this work, a new methodological approach, relying on the high specificity of enzymes in a complex mixture, was developed to estimate the composition of bioactive polysaccharides produced by microalgae, directly in algal cultures. The objective was to set up a protocol to target oligomers commonly known to be associated with exopolysaccharides’ (EPS) nutraceutical and pharmaceutical activities (i.e., rhamnose, fucose, acidic sugars, etc.) without the constraints classically associated with chromatographic methods, while maintaining a resolution sufficiently high to enable their monitoring in the culture system. Determination of the monosaccharide content required the application of acid hydrolysis (2 M trifluoroacetic acid) followed by NaOH (2 M) neutralization. Quantification was then carried out directly on the fresh hydrolysate using enzyme kits corresponding to the main monosaccharides in a pre-determined composition of the polysaccharides under analysis. Initial results showed that the enzymes were not sensitive to the presence of TFA and NaOH, so the methodology could be carried out on fresh hydrolysate. The limits of quantification of the method were estimated as being in the order of the log of nanograms of monosaccharides per well, thus positioning it among the chromatographic methods in terms of analytical performance. A comparative analysis of the results obtained by the enzymatic method with a reference method (high-performance anion-exchange chromatography) confirmed good recovery rates, thus validating the closeness of the protocol. Finally, analyses of raw culture media were carried out and compared to the results obtained in miliQ water; no differences were observed. The new approach is a quick, functional analysis method allowing routine monitoring of the quality of bioactive polysaccharides in algal cultures grown in photobioreactors.  相似文献   

Threshold and weighted-distance methods: a combined multiscale approach improves explanatory power of forest carabid beetle abundance in agricultural landscape     

Bergerot  Benjamin  Lemasle  Pierre-Gilles  Boussard  Hugues  Betbeder  Julie  Jambon  Olivier  Georges  Romain  Croci  Solène  Burel  Françoise  Baudry  Jacques 《Landscape Ecology》2022,37(1):159-174

Landscape Ecology - To analyze the scales at which landscape structure influences ecological processes, two approaches with different underlying ecological assumptions exist; the usual threshold...  相似文献   

Anticancer Alkaloid Lamellarins Inhibit Protein Kinases          下载免费PDF全文

Dianne Baunbk  Nolwenn Trinkler  Yoan Ferandin  Olivier Lozach  Poonsakdi Ploypradith  Somsak Rucirawat  Fumito Ishibashi  Masatomo Iwao    Laurent Meijer 《Marine drugs》2008,6(4):514-527

Lamellarins, a family of hexacyclic pyrrole alkaloids originally isolated from marine invertebrates, display promising anti-tumor activity. They induce apoptotic cell death through multi-target mechanisms, including inhibition of topoisomerase I, interaction with DNA and direct effects on mitochondria. We here report that lamellarins inhibit several protein kinases relevant to cancer such as cyclin-dependent kinases, dual-specificity tyrosine phosphorylation activated kinase 1A, casein kinase 1, glycogen synthase kinase-3 and PIM-1. A good correlation is observed between the effects of lamellarins on protein kinases and their action on cell death, suggesting that inhibition of specific kinases may contribute to the cytotoxicity of lamellarins. Structure/activity relationship suggests several paths for the optimization of lamellarins as kinase inhibitors.  相似文献   

Has global change induced divergent trends in radial growth of Pinus sylvestris and Pinus halepensis at their bioclimatic limit? The example of the Sainte-Baume forest (south-east France)     

Bruno Vila  Michel Vennetier  Christian Ripert  Olivier Chandioux  Eryuan Liang  Frédéric Guibal  Franck Torre 《Annals of Forest Science》2008,65(7):709-709

? It is agreed that climate (precipitation and temperature) influences the distribution of plant species. Near the margins of a species’ natural range, climate becomes limiting to physiological processes. There, climate change may be expected to have a significant impact on tree growth and the species’ ranges may be altered.

? In order to assess what influence climate change could exert on the distribution of pine species at their margin, radial growth trends in ring-width chronologies over the last century were analysed. In the French Mediterranean area where climate change is characterized by increased temperature, forest plots were selected along an altitudinal transect on the north-facing slope of the Sainte-Baume mountain (Bouches-du-Rhône, France) where the ranges of Pinus sylvestris and Pinus halepensis overlap.

? Two growth patterns were identified. For P. halepensis, radial growth has increased at all altitudes indicating that climate change has improved growth conditions of this species near the margin of its ecological range. For P. sylvestris, radial growth has increased only at low altitudes and even decreased at high altitudes.

? It must be deduced that the growth changes observed cannot be generalised either at the species level or at the geographical level and must be interpreted with great caution.

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Induction of Soil Suppressiveness Against Rhizoctonia solani by Incorporation of Dried Plant Residues into Soil     

Kasuya M  Olivier AR  Ota Y  Tojo M  Honjo H  Fukui R 《Phytopathology》2006,96(12):1372-1379

ABSTRACT Suppressive effects of soil amendment with residues of 12 cultivars of Brassica rapa on damping-off of sugar beet were evaluated in soils infested with Rhizoctonia solani. Residues of clover and peanut were tested as noncruciferous controls. The incidence of damping-off was significantly and consistently suppressed in the soils amended with residues of clover, peanut, and B. rapa subsp. rapifera 'Saori', but only the volatile substance produced from water-imbibed residue of cv. Saori exhibited a distinct inhibitory effect on mycelial growth of R. solani. Nonetheless, disease suppression in such residue-amended soils was diminished or nullified when antibacterial antibiotics were applied to the soils, suggesting that proliferation of antagonistic bacteria resident to the soils were responsible for disease suppression. When the seed (pericarps) colonized by R. solani in the infested soil without residues were replanted into the soils amended with such residues, damping-off was suppressed in all cases. In contrast, when seed that had been colonized by microorganisms in the soils containing the residues were replanted into the infested soil, damping-off was not suppressed. The evidence indicates that the laimosphere, but not the spermosphere, is the site for the antagonistic microbial interaction, which is the chief principle of soil suppressiveness against Rhizoctonia damping-off.  相似文献   

Raindrop erosion of tillage induced microrelief: possible use of the diffusion equation   总被引：1，自引：0，他引：1  

Olivier Planchon  Michel Esteves  Norbert Silvera  Jean-Marc Lapetite 《Soil & Tillage Research》2000,56(3-4):131-144

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Investigating the use of fallout and geogenic radionuclides as potential tracing properties to quantify the sources of suspended sediment in a mining catchment in New Caledonia,South Pacific     

Sellier  Virginie  Navratil  Oldrich  Laceby  J. Patrick  Allenbach  Michel  Lefèvre  Irène  Evrard  Olivier 《Journal of Soils and Sediments》2020,20(2):1112-1128

Journal of Soils and Sediments - New Caledonia, a French island located in the south-west Pacific Ocean, has vast nickel resources. Open-cast mining has strongly increased soil erosion and the...  相似文献   

Topical dsRNA delivery induces gene silencing and mortality in the pea aphid     

Jinzhi Niu  Wan‐Jun Yang  Yuan Tian  Jia‐Yao Fan  Chao Ye  Feng Shang  Bi‐Yue Ding  Jun Zhang  Xin An  Li Yang  Teng‐Yu Chang  Olivier Christiaens  Guy Smagghe  Jin‐Jun Wang 《Pest management science》2019,75(11):2873-2881

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