Browsing by Title Artículos de revistas
Now showing items 2012-2031 of 4968
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(WILEY-BLACKWELL, 2016)Orestias ascotanensis is a killifish endemic to the Ascotan salt pan in the Chilean Altiplano, where it inhabits 12 springs with different degrees of isolation. This species is a suitable model for studying the effect of ...
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(Public Library Science, 2020)Many freshwater ecosystems worldwide, and particularly Mediterranean ones, show increasing levels of salinity. These changes in water conditions could affect abundance and distribution of inhabiting species as well as the ...
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(BLACKWELL, 2008-05)The movement of materials and organisms between ecosystems is a common process in nature. In the present study we investigate the hypothesis that the movement of consumers between ecosystems depends not only on the ...
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(Elsevier, 2017)The complex orogenic history and structure of Southern South America, coupled with Pleistocene glacial cycles, have generated paleoclimatic and environmental changes that influenced the spatial distribution and genetic ...
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(University of Chicago, 2020)Amphibian locomotor capacity is strongly linked to temperature and hydration. However, organisms in nature experience covariation of multiple environmental factors, and thus to better understand the effects of thermal and ...
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(Amer Geophysical Union, 2021)Using a time series of geomagnetic storm events between 1957 and 2019, obtained by selecting storms where Dst<-50 nT, we have analyzed the probability of occurrence of moderate, intense, and severe events. Considering that ...
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(SOCIEDAD CHILENA DE QUIMICA, 2004-09)Condensation of 4-methylthiobenzaldehyde with 1-nitropropane unexpectedly afforded separable amounts of both (E)- and (Z)-1-(4-methylthiophenyl)-2-nitrobutene. The H-1 and C-13 NMR spectra allowed the unequivocal assignment ...
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(Sociedad Chilena de Quimica, 2004)Condensation of 4-methylthiobenzaldehyde with 1-nitropropane unexpectedly afforded separable amounts of both (E)- and (Z)-1-(4-methylthiophenyl)-2- nitrobutene. The 1H and 13C NMR spectra allowed the unequivocal assignment ...
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(Scientific Research Publishing, 2018)Diatom floras were examined in a high-altitude geothermal field, 4200 - 4500 m (29 degrees 19'S 68 degrees W'), located in the Central Andean dry Puna ecoregion or southern Altiplano. These locations include hostile ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2010-05-02)Several isolates of three Fusarium species associated with the Gibberella fujikuroi species complex were characterized for their ability to synthesize gibberellins (GAs): Fusarium sacchari (mating population B), Fusarium ...
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(2001)As well as being phytohormones, gibberellins (GAs) are present in some fungi and bacteria. Indeed, GAs were first discovered in the fungus Gibberella fujikuroi, from which gibberellic acid (GA3) and other GAs are produced ...
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(JOHN WILEY & SONS, 2008-10)The timing of major glacial changes between Marine Isotope Stage (MIS) 5e and the Younger Dryas chron (YD) in southern South America is reviewed. Focus is placed on studies that use cosmogenic nuclide measurements. However, ...
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(Nature, 2022)The Last Glacial Termination (T1) featured major changes in global circulation systems that led to a shift from glacial to interglacial climate. While polar ice cores attest to an antiphased thermal pattern at millennial ...
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(Wiley, 2019)The global increase in the proportion of land cultivated with pollinator-dependent crops implies increased reliance on pollination services. Yet agricultural practices themselves can profoundly affect pollinator supply and ...
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(2000)The relative gas-phase acidity of halosubstituted acetic acids CH2XCO2H, CHX2CO2H and CX3CO2H (X = F, CI, and Br) is analyzed in terms of global and local descriptors of reactivity. The model is based on the analysis of ...
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(2003)A detailed analysis of the global and local reactivity patterns of neutral and charged peroxides, including hydrogen peroxide (HOOH), peroxynitric acid (HOONO2), the peroxymonocarbonic ion (HOOCO2-), and the peroxymonosulfate ...
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(2000)We study the attractivity properties of equilibrium points of the scalar delay difference equation xn+1-xn= -δxn+pf(xn-k) which arises in many contexts in the ecology. New sufficient conditions for the global stability of ...
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(Elsevier, 2019)Inorganic polyphosphates (polyP) are present in all living cells and several important functions have been de-scribed for them. They are involved in the response to stress conditions, such as nutrient depletion, oxidativestress ...
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(1994)Based on integral inequalities and on a compactness argument, we will prove global existence results and we will study the asymptotic behavior of solutions of general nonlinear differential systems. © 1994 Academic Press, Inc.