Search results for " protect"
showing 10 items of 1247 documents
Análisis de la interacciones parásito-hospedador en el modelo Echinostoma caproni-roedor, con énfasis en los factores que determinan el curso de la i…
2015
En la presente Tesis Doctoral se analizan diferentes parámetros implicados en las relaciones parásito-hospedador en helmintiasis intestinales mediante la utilización del modelo experimental Echinostoma caproni-roedor. Con esta finalidad se estudian diversos aspectos inmunológicos, además de las alteraciones intestinales inducidas por la infección en dos sistemas parásito-hospedador: E. caproni-ratón y E. caproni-rata. Los resultados obtenidos ponen de manifiesto que el IFN-γ y el óxido nítrico son mediadores fundamentales en el desarrollo de infecciones crónicas en ratón, induciendo disfunción mitocondrial en las células del epitelio intestinal e hiperplasia tisular. No obstante, se sugiere…
Biologically based models of cancer risk in radiation research
2020
PURPOSE: In radiation risk analysis the state-of-the-art approach is based on descriptive models which link excess rates of cancer incidence and mortality to radiation exposure by statistical association. To estimate the number of sporadic and radiation-induced cases descriptive models apply parametric dose response function which directly determine the radiation risk. In biologically-based models of cancer risk (BBCR models) dose responses are implemented for key events on the biological level such as early mutations or clonal expansion of initiated cells. Influenced by radiation these events then shape the risk response on the epidemiological level. Although BBCR models facilitate a more …
Tradeoffs in the evolution of plant farming by ants
2020
Diverse forms of cultivation have evolved across the tree of life. Efficient farming requires that the farmer deciphers and actively promotes conditions that increase crop yield. For plant cultivation, this can include evaluating tradeoffs among light, nutrients, and protection against herbivores. It is not understood if, or how, nonhuman farmers evaluate local conditions to increase payoffs. Here, we address this question using an obligate farming mutualism between the ant Philidris nagasau and epiphytic plants in the genus Squamellaria that are cultivated for their nesting sites and floral rewards. We focused on the ants' active fertilization of their crops and their protection against he…
Organisational responses to regulatory pressure: A case study of a Norwegian Research University’s strategic compliance to GDPR
2020
Master's thesis in Innovative governance and public management (ME523) This thesis study seeks to test Oliver’s (1991) theory for prediction of Strategic Responses to Institutional Processes, against the case of initial responses taken by a Norwegian research university when faced with General Data Protection Regulation (GDPR) of European Union (EU).This thesis explores how different parts of the same organisation respond to and manage institutional pressure. It uses a case study of a Norwegian research university’s response to the European Union’s General Data Protection Regulation (GDPR). An exploratory case study design frame was used to address the research question, and qualitative dat…
Antineoplastic agents and the use of personal protective equipment: nursing staff awareness
2020
Introduction. Along with an increasing number of cancer patients, the need for cytostatic drugs is also increasing. Nursing staff are the largest professional group exposed to the potential dangers of these substances. Aim of the study. Assess the awareness of nursing staff who have direct contact with cytostatic drugs in the use of personal protective equipment (PPE). Material and methods. The research group consisted of 101 nurses routinely exposed to cytostatic drugs. A diagnostic survey and questionnaire technique were used along with the author’s original questionnaire. Results. Of the respondents, 58.42% (n=59) never used protective shoes while dealing with cytostatics, while 53.4% (n…
El cumplimiento de la obligación
2021
Il saggio offre una sintetica panoramica sulla disciplina italiana dell'adempimento e sulle principali questioni interpretative sorte negli ultimi anni. Lo studio intercala l'esposizione del diritto italiano con il confronto con il diritto colombiano delle obbligazioni. La seconda parte è dedicata ad alcune delle questioni dogmatiche più rilevanti, a partire dalla nozione di adempimento e dalle teorie sull'oggetto dell'obbligazione. The essay offers a concise overview of the Italian discipline of performance and the main interpretative issues that have arisen in recent years. The study intersperses the exposition of Italian law with the comparison with Colombian law of obligations. The seco…
Comparison of the Ultraviolet Light Filtering across Different Intraocular Lenses.
2018
SIGNIFICANCE We have analyzed the ultraviolet transmittance of some commercial intraocular lenses (IOLs). The results show differences of wavelength cutoff among them. PURPOSE The purpose of this study was to measure and compare the ultraviolet light transmittance of different IOLs made out of acrylic hydrophobic, hydrophilic, and hydrophilic with hydrophobic surface materials from different manufacturers. METHODS The spectral transmission curves of eight monofocal IOLs with the same dioptric power of +20.0 diopters were measured using a PerkinElmer Lambda 35 ultraviolet/visible spectrometer. Two IOLs of each type were tested three times. The ultraviolet cutoff wavelength at 10% transmissio…
Photoprotection and photoreception of intraocular lenses under xenon and white LED illumination.
2016
Objective. To analyze the photoprotection and phototransmission that various intraocular lenses (10Ls) provide under the illumination of a xenon (Xe) lamp and white LEDs (light emitting diode). Methods. The spectral transmission curves of six representative 10Ls were measured using a Perkin-Elmer Lambda 35 UV/VIS spectrometer. Various filtering simulations were performed using a Xe lamp and white LEDs. The spectral emissions of these lamps were measured with an ILT-950 spectroradiometer. Results. The 10Ls analyzed primarily show transmission of nearly 100% in the visible spectrum. In the ultraviolet (UV) region, the filters incorporated in the various 10Ls did not filter equally, and some o…
Optimal design of complex passive-damping systems for vibration control of large structures: An energy-to-peak approach
2014
Published version of an article in the journal: Abstract and Applied Analysis. Also available from the publisher at: http://dx.doi.org/10.1155/2014/510236 Open Access We present a new design strategy that makes it possible to synthesize decentralized output-feedback controllers by solving two successive optimization problems with linear matrix inequality (LMI) constraints. In the initial LMI optimization problem, two auxiliary elements are computed: a standard state-feedback controller, which can be taken as a reference in the performance assessment, and a matrix that facilitates a proper definition of the main LMI optimization problem. Next, by solving the second optimization problem, the …
Stereoselective cathodic synthesis of 8-substituted (1R,3R,4S)-menthylamines.
2015
The electrochemical generation of menthylamines from the corresponding menthone oximes equipped with an additional substituent in position 8 is described. Due to 1,3-diaxial interactions a pronounced diastereoselectivity for the menthylamines is found.