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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : In order to analyze the genetic control of fresh-market tomato quality, the genetic variation of quality attributes was analyzed in 45 hybrids and their 13 parental lines, grown in 2 contrasted environments. Fruit quality was assessed by physical measurements, fruit composition, and sensory analyses (descriptive analysis by a trained panel and hedonic tests by randomly chosen consumers). Most of the physicochemical traits, flavor attributes, and firm texture showed a simple additive inheritance on the contrary to the aroma and other texture traits. Specific networks of relationships among traits were shown in hybrids. Consumers perceived significant differences among hybrids and seemed to particularly appreciate the hybrids among old and modern lines.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 47 (1990), S. 611-618 
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Results of a new determination of QCD condensates frome + e −→Isospin 1 hadrons data are given. Using a new method to analyse these data, we show that the range of values for the gluon condensate 〈α/πGG〉 and for the four quarks condensates, compatible with these data, is even larger than what could be expected from the already large dispersion of previous determinations. The ‘standard’ value 0.01 GeV4 are not completely excluded for the gluon condensate. Its value is however strongly correlated with the value of the four quarks condensates. We also find evidences that the dimension 8 condensates should be rather large.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1572-9788
    Keywords: enzyme activities ; quantitative trait loci (QTLs) ; restriction fragment length polymorphism (RFLP) ; sucrose ; Zea mays L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The determinism of carbon metabolism traits during early growth in maize has been investigated using a marker-based quantitative genetics approach. In addition to growth traits, concentration of carbohydrates and activity of four key enzymes of their metabolism (sucrose phosphate synthase, ADP-glucose pyrophosphorylase, invertases and sucrose synthase) have been measured in leaves of individuals of a recombinant inbred line population. Using more than 100 RFLP markers, quantitative trait loci (QTLs) were mapped for each biochemical and developmental trait. Causal relationships, suggested by previous physiological studies, were reinforced by common locations of QTLs for different traits. Thus, the strong correlation between growth rate and invertase activity, which may reflect sink organ strength, could be explained to a large extent by a single region of chromosome 8. Moreover, some of the structural genes of the enzymes mapped to regions with QTLs affecting the activity of the encoded enzyme and/or concentration of its product, and sometimes growth traits. These results emphasize the possible role of the polymorphism of key-enzyme genes in physiological processes, and hence in maize growth.
    Type of Medium: Electronic Resource
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  • 4
  • 5
    Publication Date: 2016-06-25
    Description: We use the new global database of source time functions (STFs) and focal mechanisms proposed by Vallée (2013) using the automatic SCARDEC method ( Vallée et al. , 2011 ) to constrain earthquake rupture duration and variability. This database has the advantage of being very consistent since all the events with moment magnitudes M w 〉5.8 that have occurred during the last 20 years were reanalyzed with the same method and the same station configuration. We analyze 1754 shallow earthquakes (depth〈35 km) and use high-quality criteria for the STFs, which result in the selection of 660 events. Among these, 313 occurred on the subduction interface (SUB events) and 347 outside (NOT-SUB events). We obtain that for a given magnitude, STF duration is log normally distributed and that STFs are longer for SUB than NOT-SUB events. We then estimate the stress drop using a proxy for the rupture process duration obtained from the measurement of the maximum amplitude of the STF. The resulting stress drop is independent of magnitude and is about 2.5 times smaller for the subduction events compared with the other events. Assuming a constant rupture velocity and source model, the resulting standard deviation of the stress drop is 1.13 for the total dataset (natural log), and about 1 for separate datasets. These values are significantly lower than the ones generally obtained from corner-frequency analyses with global databases (~1.5 for Allmann and Shearer, 2009 ) and are closer to the values inferred from strong-motion measurements (~0.5 as reported by Cotton et al. , 2013 ). This indicates that the epistemic variability is reduced by the use of STF properties, which allows us to better approach the natural variability of the source process, related to stress-drop variability and/or variation in the rupture velocity.
    Print ISSN: 0895-0695
    Electronic ISSN: 1938-2057
    Topics: Geosciences
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  • 6
    Publication Date: 2016-01-08
    Description: We study the physical causes of the magnitude dependence of ground-motion decay with distance that is observed on real data. Using stochastic simulations, we analyze the role played by anelastic attenuation Q ( f ), path duration, site effect ( 0 ), finite-fault effect, and stress drop for a magnitude range between 4 and 7. We systematically look at peak ground acceleration, peak ground velocity, and pseudoabsolute spectral acceleration at different frequencies. We find that path duration, 0 , and stress-drop variations have a minor effect on this dependence. At close distances (typically distances smaller than the largest fault length), the main effect is the finite-fault effect that tends to decrease the ground-motion values of larger events. At larger distances (〉30 km), it is the effect of Q ( f ) that is preponderant and tends to lower the ground-motion values of smaller events.
    Print ISSN: 0895-0695
    Electronic ISSN: 1938-2057
    Topics: Geosciences
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  • 7
    Publication Date: 2013-10-16
    Description: Domestication of crop plants had effects on human lifestyle and agriculture. However, little is known about the underlying molecular mechanisms accompanying the changes in fruit appearance as a consequence of selection by early farmers. We report the fine mapping and cloning of a tomato (Solanum lycopersicum) fruit mass gene encoding...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 8
    Publication Date: 2015-04-01
    Description: The ground-motion variability sigma is a fundamental component in probabilistic seismic-hazard assessment because it controls the hazard level at very low probabilities of exceedance. So far, most of the analyses based on empirical ground-motion prediction equations do not consider any distance dependency of sigma. This study aims to analyze the potential distance dependency of ground-motion variability, especially in the near-field region, where the variability is poorly constrained due to the lack of available records. We, therefore, investigate the distance dependency of sigma by performing numerical simulations of ground motion for some strike-slip events. Synthetic velocity seismograms (up to 3 Hz) have been generated from a suite of finite-source rupture models of past earthquakes. Green’s functions were calculated for a 1D velocity structure using a discrete wavenumber technique ( Bouchon, 1981 ). The within-event component of the ground-motion variability was then evaluated from the synthetic data as a function of distance. The simulations reveal that the within-event component of the ground motion shows a distance dependency, subject to the rupture type. For bilateral ruptures, the variability tends to increase with distance. On the contrary, in case of unilateral events, the variability decreases with distance.
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
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  • 9
    Publication Date: 2014-10-19
    Description: We propose a new technique to determine the rupture velocity of large strike slip earthquakes. By means of simple numerical ground motion simulations, we show that when the rupture penetrates a shallow layer of sediment or fractured rock, shock waves propagate along the surface fault trace in the forward rupture direction. Such shock waves, which are insensitive to the complexity of slip over the fault plane, propagate at a phase velocity equal to the rupture speed. We show that those shock waves can be easily isolated in the frequency domain, and that phase velocity can then be simply obtained from shear strain.
    Keywords: Express Letters, Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 10
    Publication Date: 2018
    Description: 〈span〉〈div〉Abstract〈/div〉We investigate the feasibility of near‐fault ground‐motion predictions based on empirical Green’s functions (EGFs) in low‐to‐moderate seismicity areas (i.e., with few available EGFs), and we propose some adjustments to enhance the accuracy of this method. We conduct extended fault ground‐motion simulations for a large set of azimuths, based on a kinematic model description according to the k−2 method combined with the use of numerical Green’s functions. We focus on saturation of the ground‐motion peak values observed in near‐field data for moderate‐to‐large earthquakes, and we seek to identify the physical mechanisms behind this phenomenon. Based on the simulation performed here for a specific magnitude and focal mechanism, we show that the radiation pattern has a major influence on the near‐source ground‐motion saturation effect, and that the saturation effect can be seen more strongly for some azimuths compared to others, due to the orientation of the source. We also show that the depth of the source has a role, as it defines the radiation pattern. Finally, we show that unlike previously thought, geometric and anelastic attenuation adjustments are weak, as are the time‐shift adjustments due travel‐time differences from the different parts of the fault, and these do not account for the near‐fault saturation effect.〈/span〉
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
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