Browsing Theses & Dissertations by Title
Now showing items 249-268 of 2526
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Calendar anomalies in the Puerto Rico’s stock index
(2014)Esta investigación examinó los efectos del día-de-la-semana, lunes, mes-del-año y enero, en los rendimientos del Índice de Acciones de Puerto Rico (PRSI). El periodo de estudio abarcó del 1996 al 2013 y se subdividió según ... -
Calibration and validation of the first node of the meteorological x-band radar network for the west coast of puerto rico
(2009)Great concern exists among the emergency management people and National Weather Service officers with regards to the accuracy of weather data for some regions of Puerto Rico, especially in the western area of the island. ... -
Calidad microbiológica de la leche pasteurizada entera (3.25%) y parcialmente descremada (1%) en Puerto Rico y su efecto en el largo de vida útil
(2020-05-29)Se analizaron 20 muestras de leche pasteurizada (10 enteras, 10 parcialmente descremadas) durante un transcurso de 10 semanas, comenzando en noviembre 2018 y terminando en marzo 2019, para determinar el efecto que tiene ... -
Calliandra calothyrsus and Arachis pintoi supplementation effects on animal health and gastrointestinal nematodes infestation and condensed tannin extract effects on (Haemonchus contortus) larval motility
(2007)Experimentation, in vivo and in vitro, was conducted to determine the effects of condensed tannins (CT) in various tropical legumes and to evaluate their use as a means to reduce internal parasite infestation in goats. In ... -
Cambios en la comunidad de hongos endófitos cultivables de la cactácea Pilosocereus royenii infestados por Hypogeococcus pungens
(2019-05-10)In Puerto Rico, the communities of columnar cacti such as Pilosocereus royenii are being devastated by the infestation of Hypogeococcus pungens. Chemical control with insecticides is not a viable alternative because the ... -
Cambios en la temperatura vaginal asociados a la actividad física, al estrés por calor y a la humedad en vacas lecheras
(2011)Heat stress greatly affects the dairy industry especially when the facilities are established in tropical and subtropical environments. The poor design of cattle facilities could provoke that animals have to walk long ... -
Cambios en parametros de motilidad en espermatozoides bovinos inhibiedo diferentes vias metabolicas durante la capacitacion
(2018)The production of beef cattle in Puerto Rico has remained low during the last fifteen years; meanwhile, the demand of this product remains high, depending greatly on importations. The decline in the number of cattle and ... -
Cambios estructurales de la industria lechera de Puerto Rico durante los años de 1974 a 2005
(2008)The main purpose during this research was to study the structural changes in the dairy industry in Puerto Rico from 1974 to 2005, and their possible effects by using a descriptive analysis utilizing the data available of ... -
Canons of transgression: Shock, scandal, and subversion from Matthew Lewis' The Monk to Bret Ellis' American Psycho
(2004)This thesis examines the relationship between transgressive texts–traditionally defined as those that aim to challenge and possibly subvert the artistic, social, or political traditions of a culture—and their acceptance ... -
Capacidad reproductiva de Mirax insularis – Muesebeck (1937) (Hymenoptera: Braconidae) sobre larvas del minador del café Leucoptera coffeella – Guerin-ménéville (1842) (Lepidoptera: Lyonetiidae)
(2008)Leucoptera coffeella –coffee leaf miner- is one of the principal pests of coffee in Puerto Rico. In Puerto Rico have been reported 16 species of parasitoids over larvae of L. coffeella being Mirax insularis the parasitoid ... -
Capillary underfill manufacturing development and Characterization for 2nd level electronic interconnect processes
(2004)The work contained in this study establishes the process framework and methodology for implementing an underfill operation for an electronics manufacturing plant. The investigation explains development of the required ... -
Captura de fluoroquinolonas por Leucaena Leucocephala: Estudios electroquímicos y cromatográficos
(2017)La contaminación del agua por antibióticos es un serio problema ambiental. El mal manejo de los medicamentos no utilizados y la descarga a través de los residuos corporales aumentan este problema, especialmente porque la ... -
Caracterización de bacterias con potencial de uso en el control biológico de la broca del café, Hypothenemus hampei Ferrari (Coleóptera: Curculionidae: Scolytinae)
(2013)The coffee berry borer (CBB), Hypothenemus hampei Ferrari, is one of the most important pests of the coffee crop because it feeds and reproduces inside the coffee fruit. Bacteria within the Bacillus group are an alternative ... -
Caracterización de canales submarinos para la estimación acústica del rastreo de múltiples objetos
(2017)Este trabajo de tesis presenta la caracterización de canales submarinos para la estimación acústica del rastreo de múltiples objetos en movimiento. Se dedica especial atención a canales submarinos profundos. También se ... -
Caracterización de cerdos híbridos de cuatro razas (Landrace, Yorkshire Duroc y Pietrain) para desempeño productivo, calidad de canal y calidad de carne bajo condiciones de clima tropical
(2008)Ciento dieciséis cerdos híbridos (machos Pietrain x Duroc cruzados con hembras Landrace x Yorkshire o Yorkshire x Landrace), de catorce lechigadas, fueron evaluados para desempeño en crecimiento, calidad de canal y de carne ... -
Caracterización de compuestos bioactivos en hojas de guayaba (Psidium guajava) como un potencial de valor agregado en botánicos tropicales
(2011)Guava (Psidium guajava) is a botanical plant that has been used for a long time as a ceremonial and / or medicinal plant. However, chemical and biological activity of this plant is hidden and very few reported studies used ... -
Caracterización de compuestos volátiles responsables del aroma dos variedades de cafés arábicas de Puerto Rico
(2016)The attributes of greater quality and importance of coffee drinks are the aroma, flavor, color and body. To obtain a high performance coffee we must ensure their quality. This requires analysis of coffee characteristics ... -
Caracterización de Cs2CoBr4 y su posible utilización en uniones termoeléctricas
(2013)Cs2CoBr4 crystals were grown by the method of fast evaporation. The capacitance of crystals were determined using the LCZ method in the temperature range of 273 K to 310 K and frequency range of 10 KHz to 1 MHz. Graphs of ... -
Caracterización de hongos y bacterias coliformes presentes en el biosólido municipal compostado
(2012)Municipal Sewage Sludge Compost (MSSC) is used as an alternate growing media for peat. Howeve;rthe use of MSCC can be affected by the pre sense of pathogenic microorganisms. Concerns about the effects of pathogens motivates ... -
Caracterización de las poblaciones de colémbolos asociados a la hojarasca de un bosque secundario en Mayagüez, Puerto Rico
(2010)Collembolans are small arthropods, abundant in litter and, often regarded as good indicators of soil health. Diversity and abundance of litter springtails was analyzed in a Mayaguez secondary forest in leaf litter of ...