Browsing Theses & Dissertations by Title
Now showing items 769-788 of 4082
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Definition and deployment of quality tools for quality and uptime improvement in a manufacturing environment
(2006)In order to be able to prevail nowadays all companies must have knowledge of the new technologies and advances that arise daily, specially the manufacturing sector regulated by the FDA. As result of this, companies need ... -
Degradación de biodiesel y diversidad bacteriana en suelos arenosos de una zona industrial (Guayanilla, Puerto Rico)
(2005)Biodegradation of biodiesel from an industrial impacted sandy soil (Guayanilla Bay, Puerto Rico) and bacterial diversity was evaluated. Soil samples were amended with 2,500 mg/Kg of biodiesel and incubated during 41 days ... -
Degradación de p-Nitrofenol por bacterias en los ríos Añasco y Guanajibo y la Quebrada de Oro (Puerto Rico)
(2007)Biodegradation of p-nitrophenol and changes in bacterial communities during degradation process in water samples from the Añasco and Guanajibo rivers and Quebrada de Oro were determined. The degradation rate of p-nitrophenol ... -
Degradation of caffeine in coffee pulp by solid-state fermentation
(2015)Coffee pulp is the most abundant solid waste in coffee processing plants. Its reutilization could be a challenge due to the presence of compounds such as caffeine. In the current study the solid-state fermentation was ... -
Del privilegio a los márgenes : la evolución de la representación de los personajes femeninos en Papeles de Pandora de Rosario Ferré, Cuentos traidores de Rubis Camacho y las Negras de Yolanda Arroyo Pizarro
(2023-12-19)En la Década del Setenta del siglo XX, la literatura escrita por mujeres revolucionó la literatura puertorriqueña. Con Papeles de Pandora de Rosario Ferré da inicio la literatura feminista en Puerto Rico. En ese primer ... -
Democratización del arte urbano : un repositorio digital para la conservación del arte efímero
(2021-05-14)El deterioro de edificios y la consiguiente devaluación económica ha abocado a los barrios, muchos de los cuales conforman los cascos antiguos de algunas ciudades y pueblos, a un proceso de transformación de entorno. Por ... -
Densidad poblacional de Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) y su relación fenológica con los cultivos de tomate y maíz
(2007)Helicoverpa zea (Boddie) is the most important insect pest of tomato, Lycopersicum esculentum (Mill.), and corn, Zea mays L. A study was conducted (2003-2004) to estimate the density and phenology of H. zea in commercial ... -
Densidad y altura de corte y su efecto sobre el rendimiento y persistencia de Ubon Stylo (Stylosanthes guianesnsis var. vulgaris x var. pauciflora) en un oxisol de Puerto Rico
(2009)Información sobre el comportamiento de Ubon Stylo (Stylosanthes guianensis; var. vulgaris x var. pauciflora), (95 por ciento de germinación) durante el período de establecimiento es limitante en Puerto Rico. Se evaluó los ... -
Dental caries and diabetes in the elderly population in San Juan, Puerto Rico
(University of Puerto Rico, Medical Sciences Campus, 2010-08)People 65 years or older constitute 11.2% of the population in Puerto Rico, where the prevalence of diabetes is 31.9%. It has been hypothesized that diabetes could be a risk factor for caries due to increased glucose in ... -
Dependence of active mode remote Ft-Ir sensing on angle of incidence, substrate type and analyte surface concentration
(2013-12)A standoff detection scheme for a highly energetic material (HEM) and other threat chemicals deposited on substrates as contamination residues using Fourier transform infrared spectroscopy (FTIR) is described. The HEM used ... -
Deposición de proteína y energía en tilapias (Oreochromis spp.) alimentadas con dietas sub-óptimas en proteína y suplementadas con ácido glutámico, alfacetoglutárico o succínico
(2011)Four experimental diets were formulated in order to determine their effect on weight gain, fat, protein and energy retention, and body composition of tilapias (Oreochromis spp.). The control diet was formulated to contain ... -
Deposición y caracterización de películas delgadas de KTa1-x NbxO3 (ktn) dopadas con litio
(2006)In this research work suitable conditions were found for deposition of epitaxial thin films of potasium niobate-tantalate (KTN) and lithium-doped potassium-niobate tantalate (KLTN) using the Pulsed Laser Deposition (PLD) ... -
Deposition and characterization of thin films of vanadium dioxide
(2019-07-09)In this work, thin films of VO2 and V2O3, were deposited on glass (SiO2) and TiO2 (001) substrates, by D.C. magnetron sputtering, in order to study their structural, electrical, optical and morphological properties. In ... -
Depositional and diagenetic history of Mona and Monito islands, Puerto Rico and La Romana province, Dominican Republic: A regional study
(2016)Two main study sites were covered in this research: (1) Monito Island in the Mona Reef Complex, Puerto Rico and, (2) the intersection at Cḩavón River with Highway El Coral at La Romana Province, Southeast Dominican Republic. ... -
Derecho, política agraria y sociedad : la diversidad del colonato ante el Nuevo Trato en el Este de Puerto Rico, 1933-1940.
(2019-12-16)Al implantarse las políticas y programas del Nuevo Trato en Puerto Rico se impactó no sólo la tenencia de la tierra sino la mano de obra. Las agencias creadas al amparo del Nuevo Trato otorgaron subsidios a los colonos ... -
Desarrollar un modelo conceptual sobre una cadena de suministro sostenible para una operación de ensamblaje de componentes electrónicos en Puerto Rico
(2016)This project explores models related to the concept of sustainable supply chain management. The main objective is to develop a conceptual model focused on the environmental aspect of the sustainability concept for an ... -
Desarrollo de formulación y proceso de elaboración de un puré de carambola (Averrhoa carambola)
(2012)Nine varieties of fresh starfruit were obtained from the United States Department of Agriculture’s Tropical Agriculture Research Station’s (USDA-TARS) Experimental Station in Isabela and were used to develop the process ... -
Desarrollo de frutas de café (Coffea arabica L. Var. Limaní) utilizando reguladores de crecimiento y fertilizantes
(2010)With the purpose to know the response in the development of coffee (Coffea arabica) berries variety Limaní, using applications of plant growth regulators and fertilizers were realized two experiments were conducted; both ...