Browsing by Title Facultad de Ciencias
Now showing items 3918-3937 of 8178
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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.
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(Nature, 2020)The matrilineal long-finned pilot whale presents an antitropical distribution and is divided into two subspecies, one in the temperate seas of the Southern Hemisphere and the other restricted to the North Atlantic and ...
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(MDPI, 2020)Piscirickettsiasalmonis is an intracellular bacterial fish pathogen that causes piscirickettsiosis, a disease with numerous negative impacts in the Chilean salmon farming industry. Although transcriptomic studies of P. ...
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(2016)Acidithio bacillus ferrooxidans is used in industrial bioleaching of minerals to extract valuable metals. A. ferrooxidans strain ATCC 53993 is much more resistant to copper than other strains of this microorganism and it ...
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(Elsevier, 2012)We propose a model of competition of n species in a chemostat, with constant input of some species. We mainly emphasize the case that can lead to coexistence in the chemostat in a non-trivial way, i.e., where the n−1 ...
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(Elsevier Masson SAS, 2014)© 2014 Institut Pasteur. Tellurite (TeO32-) is harmful for most microorganisms, especially Gram-negative bacteria. Even though tellurite toxicity involves a number of individual aspects, including oxidative stress, ...
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(SHARED SCIENCE PUBLISHERS, 2016)The universal tRNA modification t(6)A is found at position 37 of nearly all tRNAs decoding ANN codons. The absence of t(6)A(37) leads to severe growth defects in baker's yeast, phenotypes similar to those caused by defects ...
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(Universidad de Chile, 1981)
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(Universidad de Chile, 2016)La exposicion cronica a una alta concentracion de glucosa ha sido asociada con el desarrollo de estrés oxidativo, inflamación, ambos precursores potenciales de cáncer mamario. Datos epidemiologicos han permitido asociar ...
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(2011)Background: The yeast Xanthophyllomyces dendrorhous is one of the most promising and economically attractive natural sources of astaxanthin. The biosynthesis of this valuable carotenoid is a complex process for which the ...
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(BMC, 2022)Background Alzheimer's disease is the most prevalent cause of dementia in the elderly. Neuronal death and synaptic dysfunctions are considered the main hallmarks of this disease. The latter could be directly associated to ...