Browsing Theses & Dissertations by Title
Now showing items 920-939 of 3350
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Diversidad micótica asociada a heces de gallinas ponedoras, Gallus gallus, en dos granjas avícolas de Puerto Rico
(2010)Coprophilous fungi are saprophytic organisms that live on dung. A study on coprophilous fungi associated with the feces of laying hens of the Rhode Island breed, at two poultry farms located at Moca and Lajas, was conducted ... -
Diversity and microbial community structure at a former military ranges in Vieques (Puerto Rico)
(2008)The eastern part of the island of Vieques (Puerto Rico) was subjected to live fire bombing by the US Navy and Marine Corps for approximately 60 years, leaving multiple unexploded ordnances in terrestrial and marine ... -
Diversity of Actinobacteria associated with common ant species in the Guánica Tropical Dry Forest, Puerto Rico
(2012)The diversity of Actinobacteria associated with ants that do not grow fungi was determined in the Guánica subtropical dry forest. Actinobacteria produces secondary metabolites used as antibiotics antifungals and antivirals. ... -
Diversity of Actinobacteria associated with Nasutitermes costalis termite and their ability to inhibit the growth of entomopathogenic fungi
(2013)The Actinobacteria are Gram-positive bacteria with high GC content, spore producers, and have the ability to produce antimicrobial agents. They are capable of degrading structural polysaccharides such as cellulose, ... -
Diversity of bacteria associated with the mangrove fiddler crab, Uca rapax, in Boquerón, Puerto Rico and their cellulose degradation capacity
(2013)Mangrove habitats are considered one of the most productive ecosystems in the world, and are very important because they are habitats for many microorganisms and marine invertebrates, such as fiddler crabs. Fiddler crabs ... -
Diversity of calcareous sponges (subclass Calcinea) from Puerto Rico: genetic and morphological evidence
(2017)The first findings of Puerto Rican calcareous sponges are presented in this Thesis. We analyzed the calcareous (subclass Calcinea) sponge diversity of Puerto Rico and an integrative molecular and morphological approach was ... -
Diversity of moderately halophilic bacteria associated with the soil of the black mangrove, Avicennia germinans
(2011)Mangroves are complex ecosystems that contribute the coast environment by maintaining terrestrial and marine food chains, among others. Black mangrove, Avicennia germinans, on which this study is centered, predominates ... -
Diversity of the Cabo Rojo solar salterns utilizing culture-dependent methods and description of two novel species
(2017)Archaea compose the third domain of life and are most notable for the ability of some to thrive in extreme environments, such environment is that of high salinity. This project focused on the culturable haloarchaeal diversity ... -
DNA barcoding of the Solanaceae family in Puerto Rico including endangered and endemic species
(2019)The Solanaceae family is one of the largest and well distributed plant families in the world. It contains species with agricultural and economical importance such as potatoes, eggplants, tomatoes and peppers. In Puerto ... -
DNS of turbulent channel flow with inclined, continuous and segmented V-shaped turbulators
(2011-05)The cooling system of the gas turbine blades plays a critical role in increasing the thermal efficiency and power output of advanced gas turbine engines. In fact, by increasing the heat transfer, the turbine blade can ... -
Do mergers and acquisitions have an impact on the acquiring shareholders’ wealth in Latin America?
(2011)Esta investigación examina el impacto de 177 fusiones o adquisiciones en el valor de las acciones de las entidades adquirentes en las transacciones completadas en la región de América Latina entre los años 2005 y 2010. Se ... -
Do novel Spathodea campanulata forests function as habitat for bryophytes? Analysis of diversity and establishment process
(2010)In Puerto Rico an economic change has promoted the natural succession of secondary forests dominated by alien species such as Spathodea campanulata. These forests represent novel habitats in the Neotropics and appear to ... -
Dolphinfish horizontal and vertical movements and population structure in the Western Central Atlantic
(2014)In the western central Atlantic the common dolphinfish (Coryphaena hippurus) is harvested within 30 exclusive economic zones (EEZs) and local waters where it provides essential sustenance and sport fishing opportunities ... -
Double periodic arrays with applications
(2010)Algebraic constructions of families of double periodic arrays with good autoand cross-correlation have been used for applications in frequency hopping radar and sonar, Optical Code Division Multiple Access, design of ... -
Drosophila as a versatile in vivo testbed for nanomaterial toxicity assessment.
(2012)Dramatic advances in nanomaterials synthesis and characterization provide promising possibilities for biomedical applications. Consequently, there is a growing demand for well- characterized, low cost toxicity assays for ... -
Dsd characterization and computations of expected reflectivity using data from a two-dimensional video disdrometer deployed in puerto rico
(2005)Accurate estimation of drop size distribution (DSD) for all rain rates is necessary to develop and validate rainfall retrieval algorithms. The Two-Dimensional Video Disdrometer (2DVD) presented in this research offers a ... -
Dsd variations on rain-rate estimate algorithms of x- band polarimetric radar and rainfall characterization in tropical environments using 2dvd, rain gauges and trmm data
(2005)Data from NASA TRMM satellite and rain gauges, the rain rate per hour was studied. The comparison took place in San Juan, Puerto Rico; when the Tropical Storm Jeanne passed over the island of Puerto Rico. Natural variations ... -
Dual polarized microstrip antenna array for the off-the-grid radar
(2007)The design and development of a linear antenna array operating at center frequency of 9.5 GHz is presented in this thesis. A 12 patch center-fed array composed of sub-arrays of series fed antenna array conformed by 6 ... -
Dualidad y demonización de Fenrir en el Gylfaginning de Snorri Sturluson
(2017-06-20)En esta investigación analizó la figura del lobo como monstruo en la literatura nórdica medieval en el Gylfaginning, primer capítulo del Edda de Snorri Sturluson. Partiendo de las ideas propuestas por Jeffrey Jerme Cohen ... -
Dynamic lateral response of single piles considering soil inertia contribution
(2007-05)The most widely used model to perform the analysis of piles under lateral loads consists in modeling the pile as a series of beam elements and representing the soil as a group of unconnected, concentrated springs perpendicular ...