Browsing Theses & Dissertations by Title
Now showing items 2579-2598 of 3469
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Polymorphisms influencing the shovel-shaped incisors phenotype in Puerto Rico
(2017)Puerto Ricans phenotypic traits are a combination of the admixture of their ancestors Taínos with Europeans and Africans. Shovel-shaped incisors are a common trait among Taínos’ skeletons and are still present in the Puerto ... -
Polyol synthesis and characterization of magnetic nanocrystalline cobalt and cobalt platinum
(2007)The present work addresses the systematic study of the synthesis and characterization of cobalt nanoparticles produced in polyol solutions. The kinetics of the metal forming reaction strongly influenced the stability ... -
Poner la vida al tablero : el juego de ajedrez como una representación en miniatura de la vida en La Celestina
(2022-01-13)La Celestina fue catalogada como un “best seller” al momento de su publicación en 1499. Las razones para este éxito literario son todavía hoy tema de debate en torno a su género, propósito y autoría. La extensa bibliografía ... -
Population dynamics and resource utilization by the dusky damselfish, Stegastes adustus (Troschel, 1865)
(2009)Coral reef fishes depend upon the reef substrate for the duration of their lives. Consequently, patterns of distribution and abundance of reef fishes may be influenced by this relationship. The spatial and temporal abundance ... -
Population dynamics of hurricane-generated fragments of elkhorn coral Acropora palmata (Lamarck, 1816)
(2005-05)Fragmentation and local dispersion of hurricane-generated fragments have been considered an important feature in the life history, population dynamics and genetic structure of the elkhorn coral Acropora palmata. The ... -
Population ecology and reproductive behavior of the endangered Buxus vahlii Baillon (Buxaceae)
(2001)Buxus vahlii Baillon is an endangered plant species endemic to Puerto Rico and St. Croix (USVI). There are six known populations, four in Puerto Rico (Rincón, Isabela, two in Bayamón) and two in St. Croix (Frederiksted ... -
Population ecology of the demosponge Amphimedon compressa
(2008)The population ecology of Amphimedon compressa was investigated at La Parguera, Southwest coast of Puerto Rico. A preliminary survey on the distribution, abundance and population size-structure of this sponge was initially ... -
Population ecology, spatial ecology and habitat selection of the Puerto Rican boa (Chilabothrus inornatus) in an urban fragmented landscape
(2019)Urban development and habitat encroachment are a global threat to biodiversity. Studies of wildlife thriving in urban environments are important to evaluate the impact of these anthropogenic changes to species. West Indian ... -
Population monitoring and morphometrics of Helicoverpa armigera (Hübner), Helicoverpa zea (Boddie), and their hybrids (Lepidoptera: Noctuidae) in Puerto Rico
(2018-07-20)Helicoverpa armigera and H. zea are serious pests in many crops; H. armigera was detected in 2014 in Puerto Rico. In the period February 2016 to January 2017, 112 traps with a lure for H. armigera were installed in Guanica, ... -
Population status of the black sea urchin Diadema antillarum (philippi) in la Parguera, Puerto Rico, 20 years after the mass mortality event
(2004)Before the 1983 mass mortality event, the conspicuous sea urchin Diadema antillarum was considered a key species in Caribbean coral reefs. This epizootic event caused mortalities of up to 99% in many localities of the ... -
Population structure and distribution of a new population of the endagered Aristida portoricensis (Poaceae) in Mayagüez, Puerto Rico
(2021-07)The genus "Aristida" (Poaceae) is a varied and well-distributed group of grass within the subfamily Aristidoideae. In Puerto Rico, we count with an endemic species, "Aristida portoricensis", commonly known as "Pelos del ... -
Population structure of the fireworm Hermodice carunculata in the wider Caribbean, Atlantic and Mediterranean Sea
(2017)The bearded fireworm Hermodice carunculata is an important predator invertebrate in tropical and subtropical Atlantic, including the Mediterranean. There is limited data on the genetic population structure of H. carunculata ... -
Porous carbon-faujasite composites containing transition metals for aqueous phase adsorption applications
(2014)Pharmaceutical and personal care products (PPCPs) have emerged in surface water in concentration levels enough to categorize them as “emerging contaminants” due to a lack of efficient wastewater treatment plant removal ... -
Porous coordination pillared layer networks: Hysteretic gas adsorption and functionalization for superior CO2 uptake
(2020-02-03)Porous coordination polymers (PCPs) are crystals holding pore sizes and shapes with tremendous capabilities for carbon capture based on adsorption. Coordination pillared layer networks, with copper as central node, Cu2+-CPL-n, ... -
Positive matrix factorization method for improving EEG motor imagery classification
(2017-05)Brain Computer Interface (BCI) is a system that is designed to translate a subject’s thought into a signal that is interpreted by a device. A BCI provides a communication channel between the human brain and a computer, ... -
Possible role of adenine and thymine rich sequence in the encapsidation pattern of Parvovirus LuIII
(2007)LuIII is a small, non-enveloped, icosahedral autonomous parvovirus that contains a small linear (5 kb) single stranded DNA genome and infects human cell lines lytically with no evidence of integration into cellular DNA. ... -
Post-erosional preservation of the impact record: Tracing shocked detritus from the Vredefort Dome, South Africa
(2012)Impact cratering has been recognized as an important geologic process, however, the record of impacts on Earth is minimal due to erosion, burial and tectonic modification. A diagnostic criterion used as definitive evidence ... -
Post-fire regeneration in subtropical dry forest of Puerto Rico
(2009)Dry forests were widespread in the tropics before being cleared for agricultural and urban use, but they are now considered to be one of the most endangered ecosystem types. Cleared and degraded tropical dry forests commonly ... -
Post-hurricane growth and recruitment of plant species used by birds in Northern Puerto Rico
(2004)In this work, I studied the effects of natural disturbances, specifically Hurricane Georges, on plant growth and survival in forests of north-central Puerto Rico. Eight study plots were monitored from February 1999 to ... -
Potencial productivo de Crotalaria Juncea CV. Tropic Suns en agroecosistemas de Puerto Rico
(2010)Sunn hemp (Crotalaria juncea L.) is a multipurpose legume of fast growth and high N2 fixation ability, thus justifying its use on degraded soils in the tropic to improve their fertility. However, there is limited information ...