Browsing Theses & Dissertations by Title
Now showing items 960-979 of 3350
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Economic impact of adopting an rsp in puerto rico: case studies and policy recommendations
(2011)This Project determines the economic impact related to the adoption of a Renewable Portfolio Standard in Puerto Rico. RPS policies have become key drivers to increase the use of renewable energy sources. However, its ... -
Economía de carrera y su relación con medidas antropométricas en corredores de larga distancia
(2021-05-06)En este estudio se investigó si existe relación entre economía de carrera (EC) y las siguientes medidas antropométricas: largo de extremidad inferior del cuerpo (LEIC), largo del muslo (L.muslo), largo de pierna (L.pierna) ... -
Económico y perfil de los productores orgánicos en Puerto Rico, 2007.
(2010)The purpose of this study was to examine organic farming in Puerto Rico, describe the producers profile, business characteristics, production practices, and problems and needs they encounter. A questionnaire was developed ... -
Ecuación de Schrӧdinger en espacios con curvatura constante, separación de variables, oscilador armónico cuántico y potenciales admisibles
(2013-08)Se discuten condiciones para la integrabilidad al cuadrado de las funciones de estado, al utilizar el potencial estándar en espacios de curvatura constante dos dimensionales. Además, se construye una familia de potenciales ... -
Educación en servicio para docentes universitarios: estudio de caso instrumental
(2020-05-05)En esta investigación se estudió la perspectiva de administradores y docentes en torno al proceso de educación en servicio de docentes universitarios. Por medio del método cualitativo y mediante el estudio de caso instrumental, ... -
An educational journey: The Puerto Rican experience from student to teacher in U.S. schools
(2018-01-29)This thesis presents the life stories of six Puerto Rican teachers, focusing on their educational experiences as they grew from students to teachers in U.S. schools. Using the Funds of Knowledge theoretical framework, this ... -
Efectividad de diferentes tratamientos desinfectantes sobre Salmonella Typhimurium y la probabilidad de infiltración en tomates hidropónicos durante operaciones de lavado
(2009)The consumption of fruits and vegetables has increased over the past decades due to several reasons including: change in consumption patterns, healthy lifestyles and increased availability through the year. Today we ... -
Efectividad de fungicidas sistémicos y de contacto para el control de Sigatoka negra (Mycosphaerella fijiensis Morelet) en guineo en Isabela, Puerto Rico
(2010)Sigatoka negra Mycosphaerella fijiensis (anamorfo Pseudocercospora fijiensis) es la enfermedad más limitante para la producción de guineos en Puerto Rico. Un experimento de campo se estableció en la estación Isabela para ... -
Efectividad del nematicida fluazaindolizine (salibro 500 sc) en el control de nematodos fitoparásitos en plátano (Musa acuminata X M. balbisiana, AAB)
(2017-12-05)Plantain (Musa acuminata X M. balbisiana, AAB) is the most economically important crop of Puerto Rico. During the fiscal year 2014-15 the farm gate value reached $72.6 million, equivalent to 7.81% of the local gross ... -
Efecto de bioestimulantes sobre la cosecha y deterioro poscosecha en piña (Ananas comosus), albahaca (Ocimum basilicum) y papaya (Carica papaya)
(2020-07-24)Pineapple (Ananas comosus) and papaya (Carica papaya) are among the five more important fruits grown in Puerto Rico. Basil (Ocimum basilicum) is widely grown in commercial plantings in the island and around the world. ... -
Efecto de casos anómalos en máquinas de vectores de soporte
(2009-03)Support Vector Machines (SVM) is a new technique of classification that has received much attention in recent years. In many applications, the SVM has shown better performance than machine learning methods, and it has been ... -
Efecto de diferentes concentraciones de vitamina c (ácido l-ascórbico) en el desarrollo de rancidez oxidativa en filetes de tilapia (Oreochromis niloticus) congelados
(2006)The presence of long chain omega-3 polyunsaturated fatty acids in tilapia is of great nutritional benefit for people eating it, but double bonds present in fatty acids make them very susceptible to deterioration caused by ... -
Efecto de diferentes métodos de fertilización y manejo de agua en el rendimiento del cultivo de piña [ Ananas Cosmosus (L.) Merr.] bajo condiciones de campo
(2012)Pineapple [Ananas comosus (L.) Merr.] is an important fruit crop in many tropical countries around the world. Its production has decreased dramatically in Puerto Rico by 77% since 1965. This reduction may be due to problems ... -
Efecto de edad a la matanza sobre la calidad de la carne bovina de la raza Senepol criados solo a pastoreo
(2020-12-11)The Senepol bovine breed is a meat-type Bos taurus well adapted to the tropical climate, such as that found in Puerto Rico. This breed has proven to be an important addition to the genetic group of cattle that are raised ... -
Efecto de época, carga animal y suplementación sobre el crecimiento post-destete de toretes Senepol x Charolais
(2012)The experiment was conducted in order to determine the effects of stocking rate and level of wheat middling’s supplementation on weight gains young bullocks, and on pasture availability and chemical composition. The trials ... -
Efecto de L-carnitina dietética sobre algunos parámetros repodcutivos en semen de gallos Brown Leghorn
(2020-05-26)One hundred thirty-day-old male breeders of the Brown Leghorn breed were randomized to diets with 0, 250 and 500 mg/kg of L-carnitine. All birds were fed equal amounts of their respective diet from the first week until the ... -
Efecto de la adición de L-carnitina a la dieta de codornices japonesas (Coturnix coturnix japonica) variedad tejana gigante, sobre el comportamiento productivo, ganancia en peso corporal, conversión alimenticia y características de calidad en la canal en condiciones tropicales
(2019-12-03)The objective of this study was to determine the effect of L-carnitine: 0, 50, or 100 mg/kg in the Japanese quail var. Texas A&M under tropical conditions, from 1-11 weeks of age on production parameters. Another goal ... -
Efecto de la adición en el alimento de aguas residuales de una planta productora de caramelo sobre el desempeño de cerdos desde el destete hasta terminado
(2003)Twenty-four crossbred pigs (Duroc X Yorkshire), of 28 days of age with an average live weight of 6.9 kg, were used to evaluate the addition to the diet of 0 (control), 5, and 7.5 % of wastewater from a caramel production ... -
Efecto de la alimentación con palmillo (Roystonea borinqueña) sobre la calidad de la carne de cerdo producida en Puerto Rico.
(2014)Fifty-three pigs (37 females, 16 castrated males) were evaluated to determine the quality of their meat when they consumed a diet with 2.5% palmillo (seed of royal palm, Roystonea borinqueña) compared to a diet of 0% ... -
Efecto de la alimentación con pasto Maralfalfa comparado a pasto Buffel y sorgo forrajero sobre la producción láctea en vacas Holstein regulares y pelonas
(2020-12-10)The dairy industry in Puerto Rico relies on the use of high concentrate diets to feed their cows, due to the lack of quality forage; this increases feeding costs. Therefore it is important to maximize forage intake in order ...