Browsing A) Producción científica UCSC by Title
Now showing items 1242-1261 of 1816
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Optimization by factorial design of copper (II) and toxicity removal using a photocatalytic process with TiO 2 as semiconductor
(2009)The photochemical process of Cu (II) reduction by heterogeneous photocatalysis using titanium dioxide (TiO2) Degussa P-25 and a 254 nm UV-C lamp was studied. The aim of this work was to determine the efficiency of the ... -
Optimization of cephalexin synthesis with immobilized penicillin acylase in ethylene glycol medium at low temperatures
(2004)Organic cosolvents, and among them, polyols, are suitable media to perform the enzymatic synthesis of -lactam antibiotics with immobilized penicillin acylase, because they effectively reduce water activity, depressing ... -
Optimization of the Force-Velocity Relationship Obtained From the Bench-Press-Throw Exercise: An a Posteriori Multicenter Reliability Study
(2019-03)Purpose: An a posteriori multicenter reliability study was conducted to compare the reliability of the outcomes derived from the linear force-velocity (F-V) relationship (F-intercept [F0], V-intercept [V0], F-V slope, and ... -
Optimization of Yield in Kinetically Controlled Synthesis of Ampicillin with Immobilized Penicillin Acylase in Organic Media
(2002)Immobilized penicillin acylase is a moderately priced versatile enzyme, that is able to catalyze the synthesis of derived penicillins and cephalosporins from the corresponding β-lactam nuclei and proper side-chain precursors. ... -
Options trades, short sales and real earnings management
(2019-02-17)We study the link between measures of stock options’ volatility and firms’ real earnings management (RM). We hypothesise that RM causes uncertainty in the value of a firm’s common stock and, as a result, increases the ... -
Organic matter geochemical signatures (TOC, TN, C/N ratio, δ13C and δ15N) of surface sediment from lakes distributed along a climatological gradient on the western side of the southern Andes
(2018-07)Paleolimnological studies in western South America, where meteorological stations are scarce, are critical to obtain more realistic and reliable regional reconstructions of past climate and environmental changes, including ... -
Organización retórica del género Informe de Estabilidad Financiera: un contraste entre el informe del Banco Central de Chile y del Banco Federal Alemán
(2018-02)Estudiar la organización retórica de los géneros discursivos ha permitido conocer los patrones de regularidad que subyacen al modo en que se organiza el conocimiento de un género y cómo va configurándose para la consecución ... -
La organización retórica del marco referencial en tesis de trabajo social
(2012)Los estudios de géneros discursivos han prestado poca atención a las tesis o seminarios producidos para la obtención del grado de licenciatura. En este artículo se describe, desde el enfoque del ... -
Organochlorine pesticides in surface waters from Reloncaví Fjord and the inner sea of Chiloé (~ 39.5°S - 43°S), Chilean Patagonia
(2018-01)Surface water samples from the environmental continuum spanning rivers (Petrohue, Cochamo, Puelo), fjord (Reloncaví), and the inner sea of Chiloé in Chilean Patagonia were analyzed to estimate concentration and distribution ... -
Origin makes a difference: Alternative responses of an AM-dependent plant to mycorrhizal inoculum from invaded andnative soils under abiotic stress
(2022)The presence of invasive alien plants (IAPs) alters the composition of soil arbuscular mycorrhizal (AM) fungal communities. Although fundamental for plant development, plant responses to AM from invaded soils have not been ... -
Osmoregulación y equilibrio ácido-base en el crustáceo Neotrypaea uncinata (Milne Edwards, 1837) (Decapoda: Thalassinidae): consecuencias del parasitismo por Ionella agassizi (Bonnier, 1900)(Isopoda: Bopyridae)
(2009)El efecto del estrés por salinidad es uno de los mayores determinantes de los patrones de distribución y abundancia de organismos marinos. Esto es particularmente relevante en aquellos organismos que habitan en zonas ... -
Osteomielitis: enfoque actual
(2018-01)Fundamento: la osteomielitis piógena es una enfermedad de tipo infecciosa con manifestaciones locales y generales, el diagnóstico que se realiza es clínico debido a la poca especificidad de los exámenes complementarios, ... -
Otolith elemental composition reveals separate spawning areas of anchoveta, Engraulis ringens, off central Chile and northern Patagonia
(2019-12)The anchoveta (Engraulis ringens) is widely distributed throughout the Humboldt Current (4°30′-44°S). In recent years, its eggs and larvae have also been found inside fjords and channels of northern Patagonia, close to ... -
Outline of a diplomatic leader in the international community: Hernán Santa Cruz and his works at the United Nations
(2019-11)This article analyzes the life of a diplomat who played a pivotal role in the United Nations, Hernán Santa Cruz Barceló of Chile. This diplomatic leader focused on creating the Economic Commission for Latin America and ... -
Overcoming barriers in the management of hypertension: The experience of the cardiovascular health program in Chilean primary health care centers
(2012)Objective. To assess the blood pressure control and cardiovascular risk factors (CVRFs) in a population of hypertensive patients with access to care under a government-financed program, the Cardiovascular Health Program ... -
Oxicams: Computational Thermochemical Parameters and Solubility
(2013)The following eight oxicam structures were studied using theoretical methods, (DFT), and the Gaussian 09 program in the gaseous and aqueous phases: 4-meloxicam, droxicam, isoxicam, lornoxicam, meloxicam, normeloxicam, ... -
Oxidative regeneration of toluene-saturated natural zeolite by gaseous ozone: The influence of zeolite chemical surface characteristics
(2014)In this study, the effect of zeolite chemical surface characteristics on the oxidative regeneration of toluene saturated-zeolite samples is investigated. A Chilean natural zeolite (53% clinoptilolite, 40% mordenite and 7% ... -
Oxidized Low-Density Lipoproteins Stimulate xtracellular Matrix Metalloproteinase Inducer (EMMPRIN) Release by Coronary Smooth Muscle Cells
(2004)Deposition of low-density lipoproteins (LDLs) in the vessel wall and their oxidative modification seem to initiate, or at least accelerate, the atherosclerotic process by several mechanisms, including promotion of foam ... -
Oxygen vacancies in nano-sized TiO2 anatase nanoparticles
(2019-10-15)Anatase nanoparticles containing surface oxygen vacancies (VO) and Ti3+ are of great importance for applications in photocatalysis, batteries, catalysis, sensors among other uses. The properties of VO and their dependence on ... -
Ozonation of pentylacetate contaminated waters from textile care industry
(2013)In this article the use of ozone for the treatment of pentylacetate contaminated waters is evaluated. Pentylacetate has started to be used in the drycleaning process as a new solvent due to its economic benefits. ...