Investigación y Desarrollo: Envíos recientes
Mostrando ítems 1801-1820 de 5743
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Article
Triggering avalanches by transverse perturbations in a rotating drum (2021)
(NLM (Medline), 2021-07-06)We study the role of small-scale perturbations in the onset of avalanches in a rotating drum in the stick-slip regime. By vibrating the system along the axis of rotation with an amplitude orders of magnitude smaller than ... -
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Emendation of the Coccoid Cyanobacterial Genus Gloeocapsopsis and Description of the New Species Gloeocapsopsis diffluens sp. nov. and Gloeocapsopsis dulcis sp. nov. Isolated From the Coastal Range of the Atacama Desert (Chile) (2021)
(Frontiers Media S.A., 2021-07-08)The taxonomy of coccoid cyanobacteria, such as Chroococcidiopsis, Pleurocapsa, Chroococcus, Gloeothece, Gloeocapsa, Gloeocapsopsis, and the related recent genera Sinocapsa and Aliterella, can easily be intermixed when ... -
Article
Resilience, leadership and female entrepreneurship within the context of smes: Evidence from latin america (2021)
(MDPI AG, 2021-08-01)The purpose of this article is to analyze resilient female leadership as a sustainable promoter of business excellence in small and medium-sized Wayuu handicraft marketing enterprises. The present study uses a quantitative ... -
Article
Quality of life of brazilian vegetarians measured by the whoqol-bref: Influence of type of diet, motivation and sociodemographic data (2021)
(MDPI AG, 2021-08)This study aimed to evaluate the general quality of life (QoL) of Brazilian vegetarians. A cross-sectional study was conducted with Brazilian vegetarian adults (18 years old and above). Individuals were recruited to ... -
Article
Quality of life of vegetarians during the covid-19 pandemic in Brazil (2021)
(MDPI AG, 2021-08)Health emergencies such as the COVID-19 pandemic can negatively impact quality of life (QoL) due to higher levels of stress, social isolation, and uncertainties. In this scenario, distinct population groups might react ... -
Article
Influence of thermodynamically inconsistent data on modeling the solubilities of refrigerants in ionic liquids using an artificial neural network (2021)
(Elsevier B.V., 2021-09-01)In this work, a general thermodynamic consistency test is applied to analyze phase equilibrium data (PTx) for binary refrigerant and ionic liquid mixtures. The Valderrama-Patel-Teja (VPT) equation of state and the Kwak and ... -
Article
Experimental and DFT study of natural curcumin derived dyes as n-type sensitizers (2021)
(Elsevier Ltd, 2021-09-01)In this paper, four different bio-inspired curcumin dyes were explored as n-type sensitizers in regenerative TiO2 based photoelectrochemical cells in order to rationalize their structure/performance relationships for solar ... -
Article
Pilates improves physical performance and decreases risk of falls in older adults: a systematic review and meta-analysis (2021)
(Elsevier Ltd, 2021-09)Background: Falls are the leading cause of injury-related deaths in older adults. Physical exercise is a suitable strategy to reduce the risk of falls, but there is little research on the effectiveness of specific exercise ... -
Article
The combined effect of bottom ashes and cellulose fibers on fired clay bricks (2021)
(Elsevier Ltd, 2021-09-27)The paper and pulp industry (PPI) is permanently searching for new ways of managing its residues due to the increasing pressure of new environmental concerns and policies adopted worldwide. In addition, the manufacturing ... -
Article
Ternary aromatic and anti-aromatic clusters derived from the hypho species [Sn2Sb5]3− (2021)
(Nature Research, 2021-12)Heterometallic clusters have attracted broad interests in the synthetic chemistry due to their various coordination modes and potential applications in heterogeneous catalysis. Here we report the synthesis, experimental, ... -
Article
Dexibuprofen ameliorates peripheral and central risk factors associated with Alzheimer’s disease in metabolically stressed APPswe/PS1dE9 mice (2021)
(BioMed Central Ltd, 2021-12)Background: Several studies stablished a relationship between metabolic disturbances and Alzheimer´s disease (AD) where inflammation plays a pivotal role. However, mechanisms involved still remain unclear. In the present ... -
Article
Nanostructured KxNa1-xNbO3 hollow spheres as potential materials for the photocatalytic treatment of polluted water (2021)
(Elsevier B.V., 2021-12-05)Potassium-sodium niobate-based hollows spheres were studied in the photocatalytic degradation of Basic Blue 41 dye in aqueous phase under UV irradiation. KxNa1-xNbO3 materials were prepared at 700 °C by the spray pyrolysis ... -
Article
Adaptation and validation of instruments for the measurement of school engagement and contextual factors in students of primary levels of education in chile (2021)
(AIDEP, 2021)The objective of the study was to adapt and validate questionnaires for measuring School Engagement and Contextual Factors for use with students of initial levels of education in Chile. After the adaptation of the instruments, ... -
Article
Validation of an instrument that measures contextual factors related to school engagement (2021)
(AIDEP, 2021)Contextual factors can have a significant impact on the configuration of the educational trajectory, as well as on the construction of school engagement. The objective of this study was to validate an instrument for measuring ... -
Article
School engagement: Trajectory and educational policy in iberoamerica (2021)
(AIDEP, 2021)Educational trajectories are affected by multiple factors, including structural, contextual and individual aspects. In this article, a review of the educational panorama of five Ibero-American countries (Chile, Colombia, ... -
Article
Body mass index, gait speed and manual pressure force in Chilean older women (2021)
(Federacion Espanola de Docentes de Educacion Fisica, 2021)The aim of this study is to compare the gait speed (VM), manual pressure force (PM) and the Body Mass Index (IMC) in older women who participate regularly in physical activity programs, according to age, as well as, to ... -
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Article
Effectiveness of Pulmonary Rehabilitation in Interstitial Lung Disease, Including Coronavirus Diseases: A Systematic Review and Meta-analysis (2021)
(W.B. Saunders, 2021)Objective: A meta-analysis of randomized controlled trials (RCTs) was conducted to determine the effect of pulmonary rehabilitation on functional capacity and quality of life in interstitial lung diseases, including those ... -
Article
Online platform for the evaluation of school engagement, 2.0 version: From the chilean experience to its use in iberoamerican countries (2021)
(AIDEP, 2021)This article presents the development of version 2.0 of a technological platform for evaluating school engagement in Chile, Colombia, Peru, Uruguay and Spain. The platform contains instruments for measuring school engagement ... -
Article
Modeling the school engagement effect on school performance in five iberoamerican countries (2021)
(AIDEP, 2021)The objective of this study to understand school engagement as mediator variable between contextual factors and school achievement in students from Chile, Colombia, Spain, Perú and Uruguay. The causal model links school ...