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Mostrando ítems 3921-3930 de 13264
Mechanisms and product distribution of the O3-initiated degradation of (E)-2-heptenal, (E)-2-octenal and (E)-2-nonenal
(American Chemical Society, 2017-06-16)
The O3-molecule initiated degradation of three 2-alkenals (E)-2-heptenal, (E)-2-octenal, and (E)-2-nonenal has been investigated in a 1080 L quartz-glass environmental chamber at 298 ± 2 K and atmospheric pressure of ...
Trifluoromethyl fluoroformyl trioxicarbonate, CF3OC(O)OOOC(O)F: The first nonsymmetric acyl trioxide
(American Chemical Society, 2009-07)
This paper reports for the first time the synthesis and characterization of trifluoromethyl fluoroformyl trioxicarbonate, CF3OC(O)OOOC(O)F. The new trioxide is obtained from the gas-phase photolytic reaction of CF ...
Static dielectric constants of acetonitrile/water mixtures at different temperatures and debye-hückel A and a0B parameters for activity coefficients
(American Chemical Society, 2007-05)
Static dielectric constants of acetonitrile/water mixtures in the whole composition range and within the temperature range from (15 to 60) °C have been measured. The values were fitted to a unique equation as a simultaneous ...
Nonsteady relaxation and critical exponents at the depinning transition
(American Physical Society, 2013-03-11)
We study the nonsteady relaxation of a driven one-dimensional elastic interface at the depinning transition by extensive numerical simulations concurrently implemented on graphics processing units. We compute the time-dependent ...
Preservation of Neuropteris ovata in roof shale and in fluvial crevasse-splay facies (Late Pennsylvanian, Sydney Coalfield, Canada): Part I: An infrared-based chemometric model
(Society for Sedimentary Geology, 2020-02)
Analytical questions relating to the influence of sedimentation on the preservation states of Carboniferous plant fossils are seldom addressed in the literature. Here we address specifically the influence facies differences ...
Un Análisis Biogeografico de la Composición y Distribución de la Avifauna de Santa Fe, Argentina
(Neotropical Ornithological Society, 2012-11)
Understanding the biogeographical patterns, in the space and time, is a key issue to identify priority areas in order to develop biodiversity conservation strategies. Distribution data are often used to prioritize areas ...
Male headbob display structure in a neotropical lizard, Liolaemus pacha (Iguania: Liolaemidae): relation to social context
(British Herpetological Society, 2015-02)
Visual communication is important in many lizard species. One conspicuous visual signal is the headbob display, which consists in a stereotyped up and down movement of the head and/or torso. We analysed male headbob displays ...
Photosynthetic performance associated with phosphorus availability in mats of Didymosphenia geminata (Bacillariophyceae) from Patagonia (Argentina and Chile)
(International Phycological Society, 2016-02)
Recently reported blooms of Didymosphenia geminata from rivers in Argentinean and Chilean Patagonia, together with non-typical blooms reported from lake systems, have the potential to alter community and ecosystem dynamics ...
Statistical thermodynamics models for polyatomic adsorbates: Application to adsorption of n-paraffins in 5A zeolite
(American Chemical Society, 2005-03)
Experimental adsorption isotherms of five n-paraffins (ethane, propane, butane, pentane, and hexane) in 5A zeolite were described by means of a statistical thermodynamics model for linear adsorbates (MLA) developed by ...
Towards a more flexible language of thought: Bayesian grammar updates after each concept exposure
(American Physical Society, 2020-04)
Recent approaches to human concept learning have successfully combined the power of symbolic, infinitely productive rule systems and statistical learning to explain our ability to learn new concepts from just a few examples. ...