Browsing Theses & Dissertations by Title
Now showing items 2707-2726 of 4062
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Nanofabrication of metal/polymer structures for surface enhanced Raman spectroscopy based biosensing
(2009-12)Raman spectroscopy is a powerful tool for detection because the Raman spectra yields information about the molecular structure of a given analyte and the technique is commonly used as a molecular fingerprint. However the ... -
Nanopore sequencing for the metagenomic analysis of the gut microbiota of the millipede Anadenobolus monilicornis
(2019-05-07)Millipedes act as important components of leaf litter decomposition in terrestrial ecosystems, thanks in part to the microbial diversity in their guts. However, millipedes and their gut microbiota are understudied, compared ... -
Nanosized Core-Shell Protein Drug Delivery Systems
(2019-05)Proteins have the complexity and specificity to be effective therapeutics. However, the same complexity that confer proteins with high specificity makes them susceptible to stability problems, immunogenicity, or rapid ... -
Nanostructured bimetallic copper-gallium catalysts for the production of methanol from carbon dioxide
(2018-12-12)The hydrogenation of carbon dioxide (CO2) to methanol is an alternative to mitigate the problems caused by global warming. Industrially, methanol is produced by hydrogenation of CO2/CO over heterogeneous catalyst Cu/ZnO/Al2O3. ... -
Narraciones de medios cruzados del ecosistema cultural del arte contemporáneo de Puerto Rico
(2021-06-04)La presente propuesta de investigación busca desarrollar un proyecto de humanidades digitales; un medio independiente, contrahegemónico en pro de la descentralización de la actividad cultural relacionada con el arte ... -
Narrativas de cubanos/as del Oriente de Cuba: Un estudio interseccional sobre las experiencias de discriminación
(2022-12-09)Este trabajo de corte cualitativo exploratorio busca indagar sobre las experiencias de discriminación que los/as cubanos/as del oriente de Cuba son expuestos/as. A través del modelo de microagresiones y de interseccionalidad ... -
Narrativas del ecosistema digital en Internet del cannabis medicinal en Puerto Rico: Arqueología digital del cannabis en Google y análisis de los recursos discursivos para construir una imagen promocional del cannabis medicinal en las portadas de la publicación digital especializada Crónicas 2018-2022
(2023-05-23)Esta investigación persiguió tres objetivos. Primeramente, se llevó a cabo una arqueología digital en y a través del motor de búsqueda Google de la forma en que el gobierno de Puerto Rico ofrece información regulada mediante ... -
Narrativas lumínicas : variabilidad y adaptabilidad de la luz en la arquitectura
(2021-05-10)Los factores ambientales, como es el caso de la iluminación, se encuentran constantemente variando, por consiguiente, el considerar la arquitectura como una que se adapta a estas diversas condiciones permite ofrecer mayor ... -
Natural rock drainage associated with unmined porphyry copper deposits in the Río Grande de Arecibo watershed, Puerto Rico
(2005)The Río Grande de Arecibo is located at the north-central part of the island of Puerto Rico; its watershed is unique because it contains most of the discovered porphyry copper deposits of Puerto Rico. Several of them were ... -
Natural-convection heat transfer in supercritical fluids
(2004)The main objective of this study is to calculate the heat-transfer coefficients for natural convection from a heated, vertical flat plate into a supercritical fluid. In the first part of this work, an equation for the ... -
Naturalistic learning of Spanish in Puerto Rico: Linguistic landscape, motivation, and identity of self through cultural expression and practices
(2018)The objective of this thesis is to examine the individual differences of eight L1 English speakers learning L2 Spanish naturalistically in Puerto Rico (PR) both as a group and as individuals. Through the use of voice-recorded ... -
Nature and evolution of a soil toposequence at coloso valley agricultural reserve
(2018)Soil physical, chemical and mineralogical properties of four profiles in a Rio Piedras-Bajura toposequence at Coloso Valley Agricultural Reserve were evaluated to theorize about the nature and evolution of these soil ... -
A navigation system for free descent-ascent autonomous underwater vehicles
(2017-05)Free vehicles are buoyant platforms designed to freely descend through the water column when ballasted. A free vehicle gathers samples from the water column or the ocean bed. Once done sampling, the vehicle releases its ... -
Near infrared spectroscopic transmission measurements for pharmaceutical powder mixtures and theory of sampling (TOS) applied in pharmaceutical industry quality control (Qc) practices
(2015)This thesis presents two projects that involve the implementation of near infrared spectroscopy. NIR spectroscopy is a fast and non-destructive spectroscopy that in combination with multivariate analysis is a very useful ... -
Necesidad de capacitación del maestro de educación agrícola de las regiones de Mayagüez, Ponce y San Germán en el área de educación especial
(2007)The increase of exceptional children in the classroom has generated preoccupation with respect to the capacity of the teacher of Agricultural Education. This descriptive - correlacional study described the capacities ... -
Necesidad de vivienda para estudiantes: estrategias para la aumentar la oferta de vivienda institucional y comunitaria para estudiantes de la Universidad de Puerto Rico, Recinto de Río Piedras.
(2020-12-21)Este proyecto de planificación explora la crisis en la oferta de vivienda institucional para estudiantes de la Universidad de Puerto Rico, Recinto de Rio Piedras (UPRRP), la cual ha sido de gran impacto para estudiantes ... -
Necesidades de orientación y adiestramiento en el uso de equipo de protección personal en fincas de producción de plátanos en municipios de la región noroeste de Puerto Rico
(2010)The objective of this study was to determine the needs of orientation and training in the use of Personal Protection Equipment (PPE) in farms dedicated to plantain production in municipalities of the northwest region of ... -
Nemátodos entomopatógenos y hongos del suelo con potencial antagónico a nemátodos entomopatógenos asociados a cítricas
(2009)The use of entomopathogenic nematodes (EPN) to control insect pests in the soil is a common practice. The objectives of this investigation were to characterize the communities of EPN associated with citrus cultivation, ...