Browsing by Title Facultad de Ciencias
Now showing items 735-754 of 8178
-
(Wiley, 2018)The Cactaceae is one of the most conspicuous and ecologically important plant families in the world. Its species may have specialist or generalist pollination systems that show geographic patterns, which are synthesised ...
-
(Springer, 2013-06-18)The arrival of exotic pollinators to new habitats may introduce new patterns of floral preference and foraging behavior that modify the structure of the resident plant-pollinator community. The aim of this paper is to ...
-
(2013)Forestry plantations are expected to be managed in ways to conserve biodiversity while producing goods and services. This goal implies a signifi cant challenge as plantations tend to reduce species richness. The presence ...
-
(Springer, 2001)Resistance and tolerance are considered to be different plant strategies against disease. While resistance traits prevent hosts becoming parasitized or reduce the extent of parasitism, tolerance traits reduce the fitness-impact ...
-
(BMC, 2020)Bombus terrestris is a European bumblebee extensively commercialized worldwide for crop pollination. In Chile, this species was introduced in 1997 and after confinement escape, it has spread and established in several ...
-
(Ecological Society of America, 2000)A two-year field study was conducted to evaluate the potential of two cactus species, Echinopsis chilensis and Eulychnia acida, to evolve defensive traits against the parasitic mistletoe Tristerix aphyllus (Loranthaceae). ...
-
(MDPI, 2020)The morphological variations of four populations of geographically isolated Triatoma infestans located in the area of inter-Andean valleys and Chaco of Chuquisaca, Bolivia, were evaluated. Fifty-three females and sixty-one ...
-
(Cambridge University Press, 2015)The Santa Marta Foliage-gleaner Automolus rufipectus is one of 19 endemic bird species found in the Sierra Nevada de Santa Marta (SNSM) in northern Colombia but until recently it was considered a sub-species of the Ruddy ...
-
Assigning degrees of stochasticity to blazar light curves in the radio band using complex networks (MDPI, 2022)We focus on characterizing the high-energy emission mechanisms of blazars by analyzing the variability in the radio band of the light curves of more than a thousand sources. We are interested in assigning complexity ...
-
(John Wiley, 2015)The association efficiency of oxytetracycline (OTC) to pharmaceutical available, ionic oil-in-water nanoemulsions is studied. Theoretical mathematical developments allowed us to differentiate by diafiltration (DF) between ...
-
(1992)Partition constants for several aliphatic alcohols between water and micellar phases were determined using ultrafiltration and dialysis. Results indicated that the micellized concentrations of the long-chain alcohol followed ...
-
(1995)Association constants of alkylpyridine bromide, CnPyB, (methyl, ethyl, propyl, and butyl) to dodecylsulfate micelles has been determined by two methods, ultrafiltration and fluorescence spectroscopy. In the last, the ...
-
(1980)The relative association degrees of different anions to micelles of hexadecyltrimethylammonium bromide (CTA) were measured by spectrophotometrically determining the amounts of p-toluenesulfonate (TOS) or benzenesulfonate ...
-
(ELSEVIER, 2006-04-20)Surface properties of aqueous solutions of mixtures of humic acid, HA, and a series of cationic surfactants, C(n)TAB, have been studied. For a fixed amount of HA, the concentration of surfactant at which micelle-like ...
-
(Elsevier, 2006)Surface properties of aqueous solutions of mixtures of humic acid, HA, and a series of cationic surfactants, CnTAB, have been studied. For a fixed amount of HA, the concentration of surfactant at which micelle-like aggregates ...
-
(Springer, 2014)
-
(2008)A technique for wavelength calibration promises to revolutionize observational astrophysics, in areas including planet searches and cosmology.
-
(Universidad de Chile, 2020-05)Las invasiones biológicas son un importante motor de pérdida de biodiversidad. Ciertas especies exóticas invaden exitosamente las comunidades y alteran los patrones locales de interacciones ecológicas, afectando el ...
-
(Rocky Mountain Mathematics Consortium, 1996)Based on integral inequalities and on the Banach's fixed point theorem, we study the problem of asymptotic equilibrium for impulsive differential equations at fixed times.