Investigación y Desarrollo: Envíos recientes
Mostrando ítems 1841-1860 de 5743
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Article
Synthesis, characterisation, crystal structure and antimicrobial evaluation of novel 6-alkoxyergosta-4,6,8(14),22-tetraen-3-one derived from natural ergosta-5,7,22-trien-3β-ol (2021)
(Taylor and Francis Ltd., 2021)In this study, we report a facile transformation starting from 5α-hydroxyergosta-7,22-dien-3,6-dione (1) to afford two novel compounds: 6-methoxyergosta-4,6,8(14),22-tetraen-3-one (2) and 6-ethoxyergosta-4,6,8(14),22-tetraen-3-one ... -
Article
Role of inflammation in hypertension (2021)
(Sociedad Medica de Santiago, 2021-02)Even though the mechanisms that mediate essential hypertension (HT) are not fully understood, an immunological-inflammatory mechanism could be the common pathway for diverse pathophysiological mechanisms. We analyze in a ... -
Article
Teachers Perceptions of the Construction of Mathematical Concepts in Everyday Contexts (2021)
(Lutheran University of Brazil, 2021-05)Background: As it is important to link the disciplines to real contexts, it is necessary to propose teaching-learning strategies based on diverse situations, inside or outside the mathematical field. This study considers ... -
Article
Formation of formaldehyde through methanol-ice-mantle (CH3OH)10bombardment by OH+cation (2021)
(EDP Sciences, 2021-06-01)Context. Formaldehyde H2CO was the first organic polyatomic molecule discovered in the interstellar medium to have been detected in a variety of sources. However, pathways to synthesize this molecule under interstellar ... -
Article
Physical Fitness Plays a Crucial Mediator Role in Relationships Among Personal, Social, and Lifestyle Factors With Adolescents' Cognitive Performance in a Structural Equation Model. The Cogni-Action Project (2021)
(Frontiers Media S.A., 2021-06-14)Background: The beneficial relationship between physical fitness and cognitive performance is affected and modulated by a wide diversity of factors that seem to be more sensitive during the development stage, particularly ... -
Article
Cadmium Accumulation Involves Synthesis of Glutathione and Phytochelatins, and Activation of CDPK, CaMK, CBLPK, and MAPK Signaling Pathways in Ulva compressa (2021)
(Frontiers Media S.A., 2021-06-21)In order to analyze the effect of cadmium in Ulva compressa (Chlorophyta), the alga was cultivated with 10, 25, and 50 μM of cadmium for 7 days, and the level of intracellular cadmium was determined. Intracellular cadmium ... -
Article
Exercise training reduces brainstem oxidative stress and restores normal breathing function in heart failure (2021)
(Elsevier Inc., 2021-08-20)Enhanced central chemoreflex drive and irregular breathing are both hallmarks in heart failure (HF) and closely related to disease progression. Central chemoreceptor neurons located within the retrotrapezoid nucleus (RTN) ... -
Article
Detection of antimicrobial resistant Salmonella enterica strains in samples of ground hedgehogs (Atelerix albiventris) reared as pets in the urban area of Santiago, Chile (2021)
(Universidad Austral de Chile, 2021)The breeding of exotic pets has become a popular practice in Chile and, within this group of animals, small mammals such as guinea pigs and hedgehogs have gained importance due to their docile behaviour. The most common ... -
Article
Structure, diversity, and environmental determinants of high-latitude threatened conifer forests (2021)
(MDPI AG, 2021)Pilgerodendron uviferum (D. Don) Florin is an endemic, threatened conifer that grows in South America. In the sub-Antarctic territory, one of the most isolated places in the world, some forest patches remain untouched since ... -
Article
Challenges of integrated learning Strategies (ILS) in a Physical Education teaching training program in Chile (2021)
(Federacion Espanola de Docentes de Educacion Fisica, 2021)Efforts developed in the university context in Chile regarding physical education (PE) teaching training linked to integrated learning strategies (ILS) are plausible. However, it is stated that all proposed pedagogical ... -
Article
Association between sleep quality and pain in young amateur athletes (2021)
(Redprint Editora Ltda, 2021)Introduction: It has been shown that there is a close association between sleep quality and pain. In young athletes, sleep disorders and pain have a particularly high prevalence; however, the relationship between them has ... -
Article
Students perception regarding the replacement of restorations (2021)
(Universidad de Ciencias Medicas de La Hab, 2021-03)Introduction: The replacement of defective restorations, which leads to a greater loss of the dental remnant before each replacement, represents the large majority of the dentist's practice. Objective: To determine if there ... -
Article
Emotional intelligence as a mediator in the relationship between academic performance and burnout in high school students (2021)
(Public Library of Science, 2021-06)Low performance of high school students and repeating a year are major problems in the education system. Low performance in the classroom generates negative emotions in young people and has been related to development of ... -
Article
Evaluation Paradoxes in the Context of Competency-based Models. Students’ Voices (2021)
(Centro de Informacion Tecnologica, 2021-06)The present study aims to examine learning assessment paradoxes in university competency-based models. Semi-structured interviews are conducted based on the concept of paradoxes and by using a qualitative approach. The ... -
Article
Test-retest reliability of five times sit to stand test (Ftsst) in adults: A systematic review and meta-analysis (2021)
(MDPI AG, 2021-06)Functional independence in adults is conditioned by lower limb muscle strength. Thus, it seems important to assess lower limb strength using reliable and easy to reproduce measurements. The purpose of this study was to ... -
Article
The use of antioxidants as potential co-adjuvants to treat chronic chagas disease (2021)
(MDPI AG, 2021-07)Chagas disease is a neglected tropical disease caused by the flagellated protozoa Try-panosome cruzi. This illness affects to almost 8–12 million people worldwide, however, is endemic to Latin American countries. It is ... -
Article
The relationship of tree nuts and peanuts with adiposity parameters: A systematic review and network meta-analysis (2021)
(MDPI AG, 2021-07)The network meta-analysis and systematic review conducted aim to comparatively assess the effects of tree nuts and peanuts on body weight (BW), body mass index (BMI), waist circumference (WC), and body fat percentage (BF%). ... -
Article
Immunodetection of rainbow trout IL-8 cleaved-peptide: Tissue bioavailability and potential antibacterial activity in a bacterial infection context (2021)
(Elsevier Ltd, 2021-11)Chemokines such as IL-8 are part of an important group of proinflammatory response molecules, as well as cell recruitment. However, it has been described in both higher vertebrates and fish that IL-8 has an additional ... -
Article
¿qué tan plena es la acción de "plena" jurisdicción? (2021)
(Pontifica Universidad Catolica de Chile, Programa de Derecho Administrativo Economico, 2020-12)This case commentary analyses the qualification of administrative actions, with regard to the Supreme Court judgment, Chamy Society v. Valparaiso Municipality (8th October 2019), which distinguishes different domains of ... -
Article
Acute effect of HIIT on testosterone and cortisol levels in healthy individuals: A systematic review and meta-analysis (2021)
(Blackwell Munksgaard, 2021)To determine the acute effect of a single high-intensity interval training (HIIT) session on testosterone and cortisol levels in healthy individuals, a systematic search of studies was conducted in MEDLINE and Web of Science ...