• Modified Laccase-Gold Nanoparticles-Tetrathiafulvalene-SPCEs Based Biosensor to Determine W(VI) in Water 

  Alvarado Gámez, Ana Lorena; Arcos Martínez, María Julia (2017)

  It was developed an amperometric biosensor to determine tungsten in water, based on the inhibition of laccase enzyme, by tungsten ions using pyrocathecol as a substrate. The enzyme was immobilized with a proper mixture ...

• Fundamentals of silicene 

  Willatzen, Morten; Lew Yan Voon, Lok Chong; Guzman-Verri, Gian Giacomo (2017-08-02)

  Silicene is a single atomic layer of silicon (Si) much like graphene, the first example of an elemental twodimensional (2D) nanomaterial whose study led to the 2010 Nobel Prize in Physics. Until 2010 or so, the only known ...

• Influence of nanosilica and diatomite on the physicochemical and mechanical properties of binder at unaged and oxidized conditions 

  Baldi Sevilla, Alejandra; Montero Villalobos, Mavis Lili; Aguiar Moya, José Pablo; Loría Salazar, Luis Guillermo (2016)

  Modification of binders helps address common distresses in pavements by changing their essential properties. In order to further characterize the role of additives in these changes, a set of nanosilica and diatomite modified ...

• Cooperative elastic fluctuations provide tuning of the metal-insulator transition 

  Guzmán Verri, Gian Giacomo (2019)

  Metal-to-insulator transitions driven by strong electronic correlations occur frequently in condensed matter systems, and are associated with remarkable collective phenomena in solids, including superconductivity and ...

• Caracterización estructural de vesículas modificadas con quitosano 

  Soto Cruz, Jackeline; Alvarado Aguilar, Patricia; Vega Baudrit, José Roberto; Redondo Gómez, Carlos; Soto Tellini, Victor Hugo; Madrigal Carballo, Sergio; Rojas Carrillo, Oscar (2018)

  Vesículas a base de L-α-fosfatidilcolina (PC) y mezclas de PC/fosfogliceroles fueron caracterizadas por medio de dispersión de luz dinámica (DLS), microscopía electrónica de barrido-criogénico (Cryo-SEM) y calorimetría de ...

• Recomendaciones y guías específicas para la disminución del impacto de las inundaciones en el cultivo de caña de azúcar en la Zona Norte (Orange Walk y Corozal) de Belice 

  Blanco, Carmelita Idalicia (2019)

  Entre las actividades productivas del país de Belice está la industria de caña de azúcar. Esta industria, además de aportar al crecimiento del país también contribuye a la mayoría de la población en la zona norte del país ...

• Mapa preliminar de peligros volcánicos para el volcán Rincón de la Vieja (Costa Rica) descripción de un escenario de afectación por lahares 

  Alpízar Segura, Yemerith (2018)

  En el presente trabajo de investigación, se elaboró un mapa preliminar de peligros volcánicos para el volcán Rincón de la Vieja, con énfasis en la afectación por lahares, con base en el cual se emiten una serie de ...

• Asymptotic expansion of the invariant measure for ballistic random walk in the low disorder regime 

  Campos Fernández, José David; Ramírez Chuaqui, Alejandro Francisco (2015)

  We consider a random walk in random environment in the low disorder regime on Zd. That is, the probability that the random walk jumps from a site x to a nearest neighboring site x+e is given by p(e)+ǫξ(x,e), where p(e) is ...

• Does Estuary Restoration Design Alter the Fine Scale Movements of Gray Smoothhounds (Mustelus californicus) in Southern California? 

  Freedman, Ryan; Espinoza Mendiola, Mario; Voss, Kelley M.; Farrugia, Thomas; Whitcraft, Christine R.; Lowe, Christopher G. (2017)

  Restored estuaries in southern California are limited in size and shape by fragmentation from human development, which can in turn restrict habitat use. Thus, it is important to assess how habitat design affects how fish ...

• Discovery of nicoyamycin A, an inhibitor of uropathogenic Escherichia coli growth in low iron environments 

  Mike, Laura A.; Tripathi, Ashootosh; Blankenship, Connor M.; Saluk, Alyssa; Schultz, Pamela J.; Tamayo Castillo, Giselle; Sherman, David H.; Mobley, Harry L. T. (2017)

  High-throughput screening and activity-guided purification identified nicoyamycin A, a natural product comprised of an uncommon 3-methyl-1,4-dioxane ring incorporated into a desferrioxamine-like backbone via a spiroaminal ...

• Genetic diversity and reproductive biology of the dioecious and epiphytic bromeliad Aechmea mariae-reginae (Bromeliaceae) in Costa Rica: implications for its conservation 

  Cascante Marín, Alfredo; Trejos Hernández, Christian; Madrigal Brenes, Ruth; Fuchs Castillo, Eric J. (2019)

  Ecological traits and pollination mode associated with dioecious sexual expression in plants are likely to influence their reproductive success and levels of genetic diversity. Dioecy is an uncommon condition in Bromeliaceae. ...

• Stem and crown allometry in four congeneric species of dioecious tropical trees 

  Fernández Otárola, Mauricio; Sazima, Marlies; Solferini, Vera Nisaka (2016)

  Morphological adaptations favor differential use of the space in tropical trees, but the variability in stem and crown allometry can be constrained by phylogenetic and mechanical factors. In addition, dioecious species ...

• Ecological Networks between Tent-Roosting Bats (Phyllostomidae: Stenodermatinae) and the Plants Used in a Neotropical Rainforest 

  Rodríguez Herrera, Bernal; Rodríguez Girón, Melissa E.; Fernández Otárola, Mauricio (2018)

  Roost ecology in bats is a complex interaction of behavioral, morphological and physiological adaptations, thus, there are many factors involved in roost selection by bat species. Approximately 22 species of bats are able ...

• Nest initiation by multiple females in an aerial-nesting orchid bee, Euglossa cybelia (Apidae: Euglossini) 

  Solano Brenes, Diego; Fernández Otárola, Mauricio; Hanson Snortun, Paul (2018)

  Among orchid bees that have been observed, nest initiation by multiple females is rare, and has never been reported from an aerial-nesting species. Here, we document nest initiation by multiple females in the aerial-nesting ...

• Diversity and composition of tropical forest plant communities in the Golfo Dulce region 

  Hofhansl, Florian; Chacón Madrigal, Eduardo; Morera Beita, Albert; Silla Cortés, Fernando; Huber, Werner; Weissenhofer, Anton; Wanek, Wolfgang (2019)

  The Golfo Dulce region located in southwestern Costa Rica represents one of the remnant global biodiversity hotspots containing the largest Pacific lowland tropical forest in Central America. Recent biogeographical analyses ...

• Esquemas en grupos y torsores 

  Esquivel Araya, Jorge Arturo (2019)

  El principal objetivo es analizar la extensión de un G-torsor dado sobre la fibra genérica de X, donde X=AnRes el espacio afín n-dimensional sobre un anillo de valuación discreta R. Para ello primero se estudiará ...

• Relation between Luminescence and Electronic Surface Characteristics in p-type Porous Silicon 

  Weisz, S. Z.; Ramírez Porras, Arturo; Gómez, Manuel; Many, A.; Goldstein, Yehuda; Savir, Esther (1997)

  Measurements of photoluminescence, electronic surface states and effective surface area, at various stages of the anodization process, are presented. The results show a behavior different from that observed on n-type porous Si.

• Phototransport Properties of a-SiC:H Alloys 

  Balberg, I.; Nery, Guillermo; Ramírez Porras, Arturo; Resto, O.; Weisz, S. Z.; Lubianiker, Y. (1995)

  We report a study of the mobility-lifetime products of the two charge carriers in a-SiC:H alloys. The measurements were carried out as a function of the carbon concentration and the temperature. An analysis, relying on the ...

• Vacuum treatment to stabilize oxidation at low temperature region in porous silicon 

  Allen, Kevin; Pereira Cubillo, Juan Sebastián; Ramírez Porras, Arturo (2020)

  Oxidation in porous silicon is studied for as-etched samples and samples subjected to high vacuum at room temperature. Attenuated Total Reflectance (ATR) measurements in infrared spectroscopy for temperatures ranging from ...

• Simulated overfishing and natural eutrophication promote the relative success of a non-indigenous ascidian in coral reefs at the Pacific coast of Costa Rica 

  Roth, Florian; Stuhldreier, Ines; Sánchez Noguera, Celeste; Carvalho, Susana; Wild, Christian (2017)

  Colonial ascidians of the genus Didemnum are common fouling organisms and are typically associated with degraded ecosystems and anthropogenic structures installed in the sea. In this study, however, the non-indigenous ...

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