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  • Springer  (60)
  • American Association for the Advancement of Science (AAAS)  (3)
  • American Institute of Physics (AIP)  (2)
  • American Chemical Society (ACS)  (1)
  • 1
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    Tuning the Architecture of Cellulose Nanocrystal–Poly(allylamine hydrochloride) Multilayered Thin Films: Influence of Dipping Parameters (2012)
    American Chemical Society (ACS)
    In: Langmuir
    Details
    Publication Date: 2012-07-04
    Description: Langmuir DOI: 10.1021/la301293r
    Print ISSN: 0743-7463
    Electronic ISSN: 1520-5827
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 2
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    Developmental control of plant Rho GTPase nano-organization by the lipid phosphatidylserine (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2019
    Description: 〈p〉Rho guanosine triphosphatases (GTPases) are master regulators of cell signaling, but how they are regulated depending on the cellular context is unclear. We found that the phospholipid phosphatidylserine acts as a developmentally controlled lipid rheostat that tunes Rho GTPase signaling in 〈i〉Arabidopsis〈/i〉. Live superresolution single-molecule imaging revealed that the protein Rho of Plants 6 (ROP6) is stabilized by phosphatidylserine into plasma membrane nanodomains, which are required for auxin signaling. Our experiments also revealed that the plasma membrane phosphatidylserine content varies during plant root development and that the level of phosphatidylserine modulates the quantity of ROP6 nanoclusters induced by auxin and hence downstream signaling, including regulation of endocytosis and gravitropism. Our work shows that variations in phosphatidylserine levels are a physiological process that may be leveraged to regulate small GTPase signaling during development.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Deep human genealogies reveal a selective advantage to be on an expanding wave front (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-11-05
    Description: Since their origin, human populations have colonized the whole planet, but the demographic processes governing range expansions are mostly unknown. We analyzed the genealogy of more than one million individuals resulting from a range expansion in Quebec between 1686 and 1960 and reconstructed the spatial dynamics of the expansion. We find that a majority of the present Saguenay Lac-Saint-Jean population can be traced back to ancestors having lived directly on or close to the wave front. Ancestors located on the front contributed significantly more to the current gene pool than those from the range core, likely due to a 20% larger effective fertility of women on the wave front. This fitness component is heritable on the wave front and not in the core, implying that this life-history trait evolves during range expansions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moreau, Claudia -- Bherer, Claude -- Vezina, Helene -- Jomphe, Michele -- Labuda, Damian -- Excoffier, Laurent -- New York, N.Y. -- Science. 2011 Nov 25;334(6059):1148-50. doi: 10.1126/science.1212880. Epub 2011 Nov 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre de Recherche, Hopital Sainte-Justine, Universite de Montreal, 3175 Cote Sainte-Catherine, Montreal, Quebec, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22052972" target="_blank"〉PubMed〈/a〉
    Keywords: *Demography ; Emigration and Immigration ; Family Characteristics ; Female ; Fertility ; *Gene Pool ; Genes ; *Genetic Fitness ; Humans ; Male ; Marriage ; *Pedigree ; *Population Dynamics ; Quebec ; Registries ; Reproduction ; *Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
    Electronic Resource
    Electronic Resource
    Fabrication and magnetic characterization of single domain Co91Fe9 nanostructures (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 6316-6318 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Linear arrays of 15 nm thick, polycrystalline Co91Fe9 nanoelements have been fabricated using e-beam lithography, collimated sputtering and lift-off. The elements have widths of 0.17 and 0.25 μm, lengths from 0.5 to 4 μm, pointed ends, and center-to-center spacing of 0.5 μm. Characterization by magnetic force microscopy shows that in the virgin state these elements are single-domain and have magnetizations parallel to their long axes. The field at which an element switches its magnetization direction is shown to depend mainly on its width, and only slightly on its length. Fields of about 440 and 680 Oe are needed to switch completely the 0.25 and 0.17 μm structures, respectively. This separation in switching fields is adequate to allow elements of different widths to be switched independently. Also, magnetic force microscopy and SQUID magnetometry analysis show that a capping layer is necessary to protect the films from oxidation. Unprotected films show an altered hysteresis loop and their associated nanostructures are not consistently single-domain. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372691
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  • 5
    Electronic Resource
    Electronic Resource
    Measurements of the diffusion rate of lithium in aluminum at low temperature by elastic recoil detection analysis (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 4582-4586 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The diffusion coefficient of lithium in aluminum has been investigated as a function of temperature between 150 and 240 °C by elastic recoil detection analysis. This dependence is found to be well described by the following expression: D =0.37(+1.30−0.28)exp{−[(126.1 ±5.2)kJ/ mol/RT]} cm2/s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336250
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  • 6
    Electronic Resource
    Electronic Resource
    Le Geotrichum candidum Link, cause possible de graves enterites chez les pintadeaux (1974)
    Springer
    Mycopathologia 53 (1974), S. 125-131 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé L'‘entérite transmissible’ du pintadeau, qui apparaît sur des animaux âgés de moins de 12 semaines, est caractérisée par une diarrhée jaunâtre et une déshydratation généralisée, un gonflement des caecums, une mortalité importante. L'analyse mycologique des aliments montre qu'il ne s'agit pas d'une mycotoxicose classique. Par contre, l'isolement duGeotrichum candidum à partir de l'intestin d'animaux atteints laisse penser que ce champignon aurait un rôle dans la maladie. Il n'y a pas transmission par l'oeuf. Les fientes, les litières et l'eau de boisson peuvent être des sources de contamination. Les essais d'infection expérimentale à l'aide de cultures duGeotrichum ont, jusqu'alors, été sans succès.
    Notes: Abstract The ‘transmissible enteritis’ of Guinea fowl chick, which appears in less than 12 weeks birds, is characterized by a yellowish diarrhea and a general dehydratation, a swelling of caecums, a large mortality. The mycological analysis of food points out that it is not a classical mycotoxicosis. On the other hand, the isolation ofGeotrichum candidum from the intestine of dead animals let presume that this fungus plays a role in the disease. There is no transmission by egg. The dungs, the litters and the drink water can be origin of contamination. Experimental infections with cultures ofGeotrichum are actually unsuccessful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02127202
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  • 7
    Electronic Resource
    Electronic Resource
    Altérations fongiques des pommes destinées aux industries de transformation (1981)
    Springer
    Mycopathologia 75 (1981), S. 165-168 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Abstract The mycological examination of nine samples of apples intended for industrial use, shows a predominance of fungal alterations related with postharvest injuries. Among the detected fungi, the possible interferences of Penicillium expansum (patulin producer) and of Fusarium (trichothecenes elaborators) in the etiology of esophageal cancer are discussed.
    Notes: Résumé L'examen mycologique de neuf lots de pommes destinées à la transformation révèle une prédominance d'altérations fongiques liées aux blessures que subissent ces fruits à la cueillette ou au cours des manutentions et du stockage. Parmi les champignons détectés, les rôles possibles du Penicillium expansum (producteur de patuline) et des Fusarium (élaborant des trichothécènes) dans l'étiologie du cancer de l'oesophage sont discutés.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00482811
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  • 8
    Electronic Resource
    Electronic Resource
    Interaction Between Phenanthrene and Zinc in Their Toxicity to the Sheepshead Minnow (Cyprinodon variegatus) (1999)
    Springer
    Archives of environmental contamination and toxicology 37 (1999), S. 251-257 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. Many contaminated sites contain a variety of toxicants. Risk assessment and the development of water quality criteria therefore require information on the interactive effects among toxicants in such mixtures. Interactions between metals are relatively well studied, but little is known about interactions between metals and hydrocarbons. This study investigated the interaction between phenanthrene and zinc in the sheepshead minnow Cyprinodon variegatus. Interaction studies were performed with 7-day-old minnows in 96-h bioassays with zinc and phenanthrene at a fixed ratio and with varying proportions of zinc and phenanthrene. Mixture toxicity was quantified with the toxic unit, additive index, and excess function methods. All three methods generally indicated an antagonistic interaction between phenanthrene and zinc, though the results also provide some evidence for a synergistic interaction at low toxicant levels or at specific phenanthrene-to-zinc ratios. Short-term uptake experiments were conducted to determine if the strong antagonistic interaction observed when zinc and phenanthrene were present at 50% of their LC50 values was due to effects of zinc and phenanthrene on each other's uptake. Significantly less 65Zn uptake occurred in the presence of phenanthrene than in its absence. In contrast, zinc did not appear to affect the uptake of 14C-phenanthrene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449900512
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  • 9
    Electronic Resource
    Electronic Resource
    Structure du radical cyano-vinyle CH2=Ċ-CN Etude expérimentale et théorique (1969)
    Springer
    Theoretical chemistry accounts 14 (1969), S. 339-349 
    Details
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Tout d'abord, on montre par RPE que le radical CH2=Ċ-CN possède à basse température une structure instable pliée et à température plus élevée une structure stable linéaire. Un calcul théorique sur ce radical ainsi que sur le radical butatriényle est en bon accord avec les résultats expérimentaux.
    Abstract: Zusammenfassung Aus ESR Messungen wird gefolgert, daß das Radikal CH2=Ċ-CN bei tiefer Temperatur in einer instabilen gebogenen Struktur und bei höherer Temperatur in einer stabilen linearen Struktur vorliegt. Theoretische Berechnungen stehen sowohl für dieses als auch für das Butatrienyl-Radikal in guter Übereinstimmung mit experimentellen Daten.
    Notes: Abstract First, it is shown by ESR that the radical CH2=Ċ-CN at low temperature presents an unstable bent structure and at higher temperature a stable linear structure. A theoretical calculation on this radical and on the butatrienyl one is in good agreement with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00527115
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  • 10
    Electronic Resource
    Electronic Resource
    Microstructural, electrical and magnetic properties of NdBa2Cu3O7−δ prepared from BaO2 (1991)
    Springer
    Journal of materials science 26 (1991), S. 2359-2364 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract NdBa2Cu3O7−δ was synthesized in oxygen from a stoichiometric mixture of Nd2O3, BaO2 and CuO between 890 and 1070
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01130182
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