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Copyright of Revista Científica de Enfermería (2071-5080) is the property of Colegio de Enfermeros del Peru and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Se determinó el efecto tóxico de extractos metanólicos, hexánicos, y de acetato de etilo de semilla y hoja de higuerilla, Ricinus communis, en la inhibición de crecimiento y desarrollo de larvas del mosquito Culex quinquefasciatus (Say). El extracto hexánico de hoja afectó el desarrollo de larvas con una concentración efectiva (CE) media CE50 = 176.1 ppm y el acetato de etilo de hoja eliminó 100% de las larvas a los 1.7 días. Los tratamientos con menores índices de inhibición de desarrollo (IID); tres de hoja: el acetato de etilo con 1, 250, y 625 ppm con formación de 0.0 y 1.3 de pupas y sin adultos y 625 ppm acortó la duración larval en 2.3 días, seguido del hexánico con 625 ppm con formación de 12.5 de pupas y 0 de adultos disminuyó el periodo larval en 2.8 días, con IID de 0.000, 0.013, y 0.063, y tres de semilla: a 1, 250, 625, y 312.5 ppm de acetato de etilo, hexano, y metanol que afectaron las viabilidades y el hexánico a 1, 250, y 312.5 ppm aumentó el periodo pupal en 1.5 y 1.6 días, la primer concentración de los tres disolventes con valores de IID de 0.250, 0.331, y 0.338. El hexánico de hoja a 1, 250, y 312.5 ppm y metanol a 1, 250 ppm afectaron la viabilidad obteniendo IID´s subsecuentes de 0.081 y 0.169, y 0.113, con 0, 5 y 10 de adultos formados y con el metanólico a 1, 250 ppm con el mínimo número de adultos. El estudio demostró que el acetato de etilo, hexano y metanol de hoja y semilla de Ricinus communis inhibieron 50% el desarrollo de la población de larvas de Cx. quinquefasciatus, afectaron la duración y viabilidad larval y pupal al grado de evitar la formación de pupas y emergencia de adultos. The toxic effect of methanolic, hexane, and ethyl acetate extracts of seed and leaf of Ricinus communis on the inhibition of growth and development of Culex quinquefasciatus (Say) mosquitoes was determined. The hexane leaf extract affected the development of larvae with a mean effective concentration (EC) EC50 = 176.1 ppm, and leaf ethyl acetate eliminated 100% of the larvae at 1.7 days. Treatments with lower development inhibition index (DII) were three of leaf: ethyl acetate with 1, 250, and 625 ppm with formation of 0.0 and 1.3 of pupae and without adults and 625 ppm shortened the larval duration in 2.3 days, followed by hexane with 625 ppm with formation of 12.5 of pupae and 0 adults decreased the larval period in 2.8 days, with DII of 0.000, 0.013, and 0.063, and three of seed: at 1, 250, 625, and 312.5 ppm of ethyl acetate, hexane, and methanol that affected the viabilities and the hexanic at 1, 250, y 312.5 ppm increased the pupal period in 1.5 and 1.6 days, the first concentration of the three solvents with DII values of 0.250, 0.331, and 0.338. The leaf hexanic at 1, 250, and 312.5 ppm and methanol at 1, 250 ppm affected the viability, resulting in subsequent DII's of 0.081 and 0.169, and 0.113, with 0, 5, and 10 adults formed and with methanolic at 1, 250 ppm with the minimum number of adults. The study showed that the extracts ethyl acetate, hexane, and methanol of leaf of R. communis inhibited 50% the development of the population of larvae of IV instar early of Cx. quinquefasciatus with 272.82, 176.06, and 924.58 ppm and those of seed with 677.37, 652.33, and 705.53 ppm, which affected larval and pupal duration and viability to the extent of avoiding the formation of pupae and adult emergency. These results demonstrate the potential of leaf and seed extracts of this plant species to be included as an alternative to the control of Cx. quinquefasciatus. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ars Boni et Aequi is the property of Universidad Bernardo O'Higgins, Facultad de Derecho y Comunicacion Social and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Medicina Interna de Mexico is the property of Colegio de Medicina Interna de Mexico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract: The photoacoustic technique (PA) was used to detect the phase transformation from amorphous to crystalline state of tungsten oxide (WO3) thin films induced by UV pulsed laser radiation at low energy (<1.5mJ). The evolution of photoacoustic signal was studied by a correlation analysis, comparing successive signals at fluences ranging from 0 to 20mJ/cm2. In this interval, it was possible to observe structural changes and the ablation threshold in films due to incident laser fluence effect. Thin films of WO3 were deposited by DC reactive magnetron sputtering over glass substrates at different deposition times. The results obtained by correlation analysis were compared with Raman spectroscopy data. [Copyright &y& Elsevier]

Copyright of Ginecología y Obstetricia de México is the property of Federacion Mexicana de Ginecologia y Obstetricia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: COVID-19 is primarily a respiratory disease; however, there is also evidence that it causes endothelial damage in the microvasculature of several organs. The aim of the present study is to characterize in vivo the microvascular reactivity in peripheral skeletal muscle of severe COVID-19 patients., Methods: This is a prospective observational study carried out in Spain, Mexico and Brazil. Healthy subjects and severe COVID-19 patients admitted to the intermediate respiratory (IRCU) and intensive care units (ICU) due to hypoxemia were studied. Local tissue/blood oxygen saturation (StO 2 ) and local hemoglobin concentration (THC) were non-invasively measured on the forearm by near-infrared spectroscopy (NIRS). A vascular occlusion test (VOT), a three-minute induced ischemia, was performed in order to obtain dynamic StO 2 parameters: deoxygenation rate (DeO 2 ), reoxygenation rate (ReO 2 ), and hyperemic response (H AUC ). In COVID-19 patients, the severity of ARDS was evaluated by the ratio between peripheral arterial oxygen saturation (SpO 2 ) and the fraction of inspired oxygen (FiO 2 ) (SF ratio)., Results: Healthy controls (32) and COVID-19 patients (73) were studied. Baseline StO 2 and THC did not differ between the two groups. Dynamic VOT-derived parameters were significantly impaired in COVID-19 patients showing lower metabolic rate (DeO 2 ) and diminished endothelial reactivity. At enrollment, most COVID-19 patients were receiving invasive mechanical ventilation (MV) (53%) or high-flow nasal cannula support (32%). Patients on MV were also receiving sedative agents (100%) and vasopressors (29%). Baseline StO 2 and DeO 2 negatively correlated with SF ratio, while ReO 2 showed a positive correlation with SF ratio. There were significant differences in baseline StO 2 and ReO 2 among the different ARDS groups according to SF ratio, but not among different respiratory support therapies., Conclusion: Patients with severe COVID-19 show systemic microcirculatory alterations suggestive of endothelial dysfunction, and these alterations are associated with the severity of ARDS. Further evaluation is needed to determine whether these observations have prognostic implications. These results represent interim findings of the ongoing HEMOCOVID-19 trial. Trial registration ClinicalTrials.gov NCT04689477 . Retrospectively registered 30 December 2020., (© 2021. The Author(s).)