• Variación en la actividad acústica de Hyalinobatrachium fleischmanni (Anura: Centrolenidae) en un ambiente urbano con diferentes niveles de ruido antropogénico 

  Rodríguez Umaña, Paulina; García Rodríguez, Adrián; Gutiérrez Vannucchi, Ana Cecilia; Sandoval Vargas, Luis Andrés (2019)

  Acoustic signals produced by animals can be masked by natural or anthropogenic environmental noise. A high proportion of the current distribution of the glass-frog Hyalinobatrachium fleischmanni (Centrolenidae) overlaps ...

• Micrurus Nigrocinctus (Central America Coralsnake) Predation 

  Muñoz, Manolo; Sandoval Vargas, Luis Andrés; Sánchez Pérez, Julio E. (2019)

  Coral snakes and their mimics are rarely preyed upon by birds. Turquoise-browed Motmots and Great KisKadees, wich feed on snakes and other reptiles, avoid models with the patterns of coral snakes or their mimics. Howerver, ...

• Ramphocelus passerinii alimentando pichones de Turdus grayi y notas sobre la reproducción de otras especies de Ramphocelus 

  Chaves Bonilla, Luis; Sandoval Vargas, Luis Andrés (2015)

  En esta nota presentamos observaciones de un Ramphocelus passerinii alimentando juveniles de Turdus grayi. Además, ampliamos los registros de la época reproductiva para Ramphocelus costaricensis y Ramphocelus carbo. Esta ...

• The differences in transmission properties of two bird calls show relation to their specific functions 

  Piza Duarte, Paola; Sandoval Vargas, Luis Andrés (2016)

  When vocalizations transmit throughout the environment, attenuation and degradation may change the information of the signal; the loss of information is related to changes in both frequency and duration of vocalizations. ...

• The first record of an audible sound produced by a ghost moth, Phassus (Hepialidae) from Costa Rica 

  Sandoval Vargas, Luis Andrés; Nishida, Kenji (2015)

  Sound production in lepidopteran adults has been reported in at least 13 families. The majority of these families produce ultrasonic sounds that are inaudible to humans. Here we report the first record of an audible sound ...

• Validación de un método para cuantificación de acetaminofén en tabletas de 500 mg por espectrofotometría ultravioleta para la prueba de uniformidad de contenido 

  Pérez López, Esteban; Rojas Hernández, Alfonso (2016-07-07)

  El presente artículo contiene los detalles de la validación del método analítico para la cuantificación de acetaminofén, en este caso para aplicar a la prueba de uniformidad de contenido a tabletas de 500 mg, por la técnica ...

• Quantum symmetry groups of noncommutative spheres 

  Várilly Boyle, Joseph C. (2001-08)

  We show that the noncommutative spheres of Connes and Landi are quantum homogeneous spaces for certain compact quantum groups. We give a general construction of homogeneous spaces which support noncommutative spin geometries.

• Quantum electrodynamics in external fields from the spin representation 

  Gracia Bondía, José M.; Várilly Boyle, Joseph C. (1994-07)

  Systematic use of the infinite-dimensional spin representation simplifies and rigorizes several questions in quantum field theory. This representation permutes "Gaussian" elements in the fermion Fock space, and is necessarily ...

• The metaplectic representation and boson fields 

  Gracia Bondía, José M.; Várilly Boyle, Joseph C. (1991-12)

  We construct explicitly the infinite-dimensional metaplectic representation and show how its use simplifies and rigorizes several questions in bosonic Quantum Field Theory. The representation permutes Gaussian elements in ...

• Síntesis de la feromona sexual de la polilla de la papa, Scrobipalpopsis Solanivora 

  Cabezas Pizarro, Jorge A.; Calzada Alan, Jose G.; Soto Tellini, Victor Hugo; Musmanni Sobrado, Sergio; Cicció Alberti, José Francisco (1988)

  Se sintetizó el acetato (E) -3- dodecenilo, atrayente sexual de la polilla de la papa (Scrobipalpopsis solanivora), utilizando dos procedimientos: una ruta acetilénica y mediante la condensación de Knoevenagel.

• Regiospecific Palladium-Catalyzed Cross-Coupling Reactions Using the Operational Equivalent of 1,3-Dilithiopropyne 

  Cabezas Pizarro, Jorge A.; Ferllini, Natasha (2020)

  A regiospecific palladium-catalyzed cross-coupling reaction using the operational equivalent of the dianion 1,3-dilithiopropyne, with aromatic iodides is reported. This reaction gives high yields of 1-propyn-1-yl-benzenes ...

• A new methodology for the synthesis of δ-substituted α,β-unsaturated δ-lactones 

  Cabezas Pizarro, Jorge A.; Amey, Adam R. (2020)

  A new protocol for the synthesis of δ-substituted-α,β-unsaturated δ-lactones was developed. Selective reaction of 1,3-dilithiopropyne with ketones, followed by addition of ethyl chloroformate formed ethyl 5-[(ethoxycarbo ...

• A new and efficient synthesis of (3E,8Z,11Z)-tetradeca-3,8,11-trienyl acetate, the major sex pheromone component of the tomato leafminer Tuta absoluta 

  Cabezas Pizarro, Jorge A. (2018)

  An efficient synthesis of (3E,8Z,11Z)-tetradeca-3,8,11-trienyl acetate, the major sex pheromone component of the tomato leafminer moth, Tuta absoluta, was accomplished. The synthesis started with but-3-yn-1-ol and gave an ...

• Synthesis of N-[3-(prop-1-yn-1-yl)phenyl] benzene sulfonamide and Determination of its Antibacterial Activity 

  Cabezas Pizarro, Jorge A.; Arias Echandi, María Laura (2019-07-25)

  The synthesis of N-[3-(prop-1-yn-1-yl)phenyl] benzenesulfonamide was performed and its antibacterial activity against Staphylococcus aureus and Escherichia coli was determined. Minimalinhibitory concentrations (MIC) of ...

• Design and synthesis of n-[3-(3-oxoprop-1-yn-1-yl) phenyl] benzene sulfonamide: a highly active antimicrobial compound 

  Cabezas Pizarro, Jorge A.; Arias Echandi, María Laura (2019)

  The synthesis of the highly active compound N-[3-(3-oxoprop-1-yn-1-yl)phenyl] benzene sulfonamide was performed and its activity against Gram (+), Gram (-), mold and yeast was determined.

• Desarrollo de un sistema de modificación genética en caoba (Swietenia macrophylla King) mediante la evaluación de la expresión transitoria y estable del gen reportero GUS 

  Madrigal Villalobos, Jessica (2023)

  La caoba (Swietenia macrophylla King) (Meliaceae) es una especie forestal muy valiosa y comercializada a nivel mundial, pero su sobreexplotación ocasionó que se convirtiera en una especie amenazada (Apéndice II, CITES). ...

• Anolis insignis (Decorated anole). Predation attempt 

  Jiménez, Ronald; Sandoval Vargas, Luis Andrés (2019)

  Two jays attacking an A. insignis on a liana 10 m above the ground.

• Frequency and synchronisation features of a highly overlapped duet changes according to the context 

  Méndez Vázquez, Carolina; Sandoval Vargas, Luis Andrés (2019)

  Territorial defence and maintaining contact are two hypotheses of duet functions. Nevertheless, the acoustic characteristics of duets in these contexts have been poorly quantified. This work aimed to compare the spectrotemporal ...

• Geographic variation in the duets of the Rufous-naped Wren (Campylorhynchus rufinucha) complex 

  Ku Peralta, Wiliam; Navarro Sigüenza, Adolfo G.; Sandoval Vargas, Luis Andrés; Sosa López, Roberto (2020)

  Acoustic signals used in animal communication play a key role in mate attraction, species recognition, and territory defense. Variation in acoustic signals may reflect population structure, lack of gene flow, and phylogenetic ...

• Territory size, population density, and natural history of Cabanis’s Ground Sparrow, an endemic species found in urban areas 

  Juárez Jovel, Roselvy; Angulo Irola, Marta de la Paz; Carman, Ernesto; Sandoval Vargas, Luis Andrés (2021)

  Worldwide urban expansion threatens biodiversity inhabiting the original natural environments now being transformed, especially range-restricted species. Here, we provide estimates of population density, population size, ...

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