Browsing by Title Artículos de revistas
Now showing items 3363-3382 of 4968
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(American Institute of Physics, 2020)We present a phenomenological procedure of dealing with the COVID-19 (coronavirus disease 2019) data provided by government health agencies of 11 different countries. Usually, the exact or approximate solutions of ...
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(Frontiers Media, 2020)Xanthophyllomyces dendrorhoussynthesizes astaxanthin, a carotenoid used in aquaculture. Astaxanthin is synthesized from metabolites of the mevalonate pathway, which are also precursors for sterols biosynthesis. The ...
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(Cambridge University Press, 2017)Choclero is a Chilean traditional floury maize, consumed as a vegetable, with large economic and cultural value due to its culinary properties that give unique characteristics to the traditional local cuisine. Market ...
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(2012)Phenotypic flexibility in metabolic rates allows organisms to reversibly adjust their energy flow to meet challenges imposed by a variable environment. In turn, the food habits hypothesis (FHH) predicts that species or ...
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(ELSEVIER SCIENCE INC, 2005-01)The intestinal plasticity of digestive enzymes of amphibian species is poorly known. The goal of this study was to characterize digestive enzyme profiles along the small intestine of adult frogs, Xenopus laevis, in response ...
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(2007)The ability of a genotype to respond to changes in the environment through modifications in the phenotype is adaptive when the plastic genotypes attain a higher fitness than non-plastic genotypes. In this study we examine ...
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(AMER INST PHYSICS, 2006-01-28)The electrophilicity index is analyzed within the framework of spin-polarized density-functional theory. In this context, constrained philicities, omega(N)equivalent to(mu(N))(2)/(2 eta(NN)), are introduced in order to ...
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(PUBLIC LIBRARY SCIENCE, 2009-04-17)In humans, the absence or irreversible loss of hair cells, the sensory mechanoreceptors in the cochlea, accounts for a large majority of acquired and congenital hearing disorders. In the auditory and vestibular neuroepithelia ...
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(Elsevier Sequoia S. A., 1982-06-16)
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(2005)Proteoid roots play a major role in enabling white lupin (Lupinus albus L.) to adapt to phosphate (Pi) deficiency. Such roots release citrate from proteoid rootlets, which allows this species to mobilize Pi from sparingly ...
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(1992)During some biogeochemical processes mediated by bacteria, essential nutrients such as phosphate can become limiting for the microorganisms, affecting their biological activity. We have analyzed changes in total protein ...
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(1993)We have analysed the response of the acidophilic chemolithotroph Thiobacillus ferrooxidans to phosphate starvation. Cultivation of the bacteria in the absence of added phosphate induced a remarkable filamentation of the ...
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(2016)The pollen grains arise after meiosis of pollen mother cells within the anthers. A series of complex Structural changes follows, generating mature pollen grains capable of performing the double fertilization of the female ...
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(1988)Mammalian and yeast hexokinases were reported to be reversibly inhibited by fructose 2,6-bisphosphate in the presence of cytosolic proteins (H. Niemeyer, C. Cerpa, and E. Rabajille (1987) Arch. Biochem. Biophys. 257, 17-26). ...
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(1986)Phosphorylation of phosphatidylinositol to phosphatidylinositol 4-monophosphate and to phosphatidyl-inositol 4,5-bisphosphate was demonstrated in transverse-tubule membranes isolated from frog skeletal muscle using [γ-32P]ATP ...
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(Elsevier, 2012)In this work, TiO2–N powders were synthesized by high-energy ball milling, using commercial titanium dioxide (TiO2) in the anatase phase and urea to introduce nitrogen into TiO2 in order to enhance their photocatalytic ...
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(Springer Science and Business Media Netherlands, 2014)The Valparaiso Region is characterized by the presence of air sheds that modulate the general atmospheric circulation with local winds. The ozone concentration in the region increases from the west coast toward the mountainous ...
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(1994)The photodecomposition of new 1,4‐dihydropyridine, furnidipine (CRE‐319); 2,6‐dimethyl‐4‐(2‐nitrophenyl)‐1,4‐dihydropy‐ridine‐3,5‐dicarboxylic acid 3‐tetrahydrofurfuryl (5‐methyl diester) was studied by voltammetric, UV‐vis ...
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(ESG Publisher, 2017)In this work nanostrutured copper oxides (CuxO) were prepared by ultrasound-assisted anodization of copper foils. These CuxO nanostructures were characterized morphologically and structurally by SEM and XRD, respectively. ...