Browsing by Title Facultad de Ciencias
Now showing items 3815-3834 of 8173
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(Elsevier, 2020)A pilot study was initiated in 2018 under the Global Atmospheric Passive Sampling (GAPS) Network named GAPS-Megacities. This study included 20 megacities/major cities across the globe with the goal of better understanding ...
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(Universidad de Chile., 2015)Santiago es el principal centro urbano, económico e industrial de Chile, donde existe un foco de contaminación atmosférica. En Chile, se han realizado numerosos estudios de la calidad del aire de Santiago, pero según ...
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(AMER PHYSIOLOGICAL SOC, 2006-09)To maintain water balance, nectar-feeding vertebrates oscillate between meeting the challenges of avoiding overhydration and preventing dehydration. To understand how green-backed firecrowns (Sephanoides sephanoides) ...
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(Elsevier, 2015)Seventeen compounds (2-18) synthetized from the diterpenoid ent-beyer-15-en-18-ol (1) isolated from aerial part of Baccharis tola were tested for their gastroprotective activity on the model of HCl/EtOH-induced gastric ...
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(2011)The effects of epitaondiol (1) and sargaol (2), isolated from the brown alga Stypopodium flabelliforme on HCl/ethanol-induced gastric lesions in mice were evaluated and compared with that of lansoprazole. Epitaondiol and ...
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(MDPI AG, 2018)© 2018 MDPI AG. All rights reserved. Forty-three metabolites including several methoxylated flavonoids, tremetones, and ent-clerodane diterpenes were accurately identified for the first time in the ethanolic extract of P. ...
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(Elsevier, 2016)Natural or synthetic coumarins showed gastroprotective and antiulcer activity in animal models. In this study, we have synthetized twenty coumarins using classic methods to evaluate their gastroprotective effects on the ...
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(Elsevier, 2016)Mulinane diterpenoids isolated from Azorella species have displayed gastroprotective effects in animal models. In this study we have transformed the main constituent, mulin-11,13-dien-20 oic acid from this plant using the ...
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(Wiley, 2017)Background: Comparative studies beyond the traditional model organisms have been instrumental in enhancing our understanding of the conserved and derived features of gastrulation, a fundamental process in which the germ ...
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(National Academy of Sciences, 2018)© 2018 National Academy of Sciences. All Rights Reserved. The voltage-gated proton (Hv1) channel, a voltage sensor and a conductive pore contained in one structural module, plays important roles in many physiological ...
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(1992)Previous analyses on the gauge invariance of the action for a generally covariant system are generalized. It is shown that if the action principle is properly improved, there is as much gauge freedom at the end points for ...
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(Chilean Chemical Society, 2010-09-14)The compounds N3P3[NH(CH2)3Si(OEt)3]6 (1), N3P3[NH(CH2)3Si(OEt)3]3[NCH3(CH2)3CN]3 (2) and N3P3[NH(CH2)3Si(OEt)3]3 [HOC6H4(CH2)CN]3 (3) undergo slow gelation at the interface oil/air at low temperatures to give perfect ...
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(Universidad de Chile, 2007)
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(Universisdad de Chile, 2010)En plantas, el aparato de Golgi es el organelo, se sintetiza la mayoría de los polisacáridos no celulosicos de la pared celular y se modifican los lípidos y proteínas mediante la adición de cadenas lateralmente de ...
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(Universidad de Chile, 2023)This work describes the creation and characterization of human neuroblastoma SH-SY5Y lines knock-out for PRPK (P53 Related Protein Kinase), a poorly characterized kinase with a role related to the regulation of axon ...
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(Universidad de Chile., 1989)En La presente tesis se hace un estudio de distintos tipos de radiaciones observadas en varias regiones de la magnetosfera terrestre. Estas están asociadas a tormentas o subtormentas que experimenta la magnetosfera y que ...
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(Universidad de Chile, 2021)La gerociencia es una disciplina científica fundada hace menos de 20 años, que busca describir la relación entre la aparición de enfermedades y las causas biológicas del envejecimiento. La investigación en el área ha ...
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(Universisdad de Chile, 2013)El transporte de sorbitol, un polialcohol reducido de glucosa, a través del floema confiere a las plantas algunas ventanas como una mejor movilidad de boro entre los órganos, y mayor resistencia a distintos estres abioticos ...
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(Universisdad de Chile, 2016)Mediante la ingeniería genética se han generado diversas proteínas recombinantes con aplicaciones terapéutico, conocidas también como biofarmacos. Dentro de estos, se han desarrollado nuevas formas de anticuerpos terapeuticos, ...
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(Universisdad de Chile, 2016)En la mayoría de la especies vegetales, la sacarosa es el principal azúcar transportado desde los órganos fotosínteticos hacia los órganos sumideros. Sin embargo, en las especie de las familias Rosácea y Plantaginácea, ...