Investigación

Synthesis and preliminary determination of antibacterial activity of some 1,3-enynes

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

The synthesis of five 1,3-enynes was performed and its activity against Gram-positive and Gram-negative bacteria was determined.

Antimicrobial activity of sodium carboxylates against arcobacter sp. y campylobacter Sp.

Acuña Díaz, Lucía; Umaña Solano, Melissa; Cabezas Pizarro, Jorge A.; Redondo Solano, Mauricio; Chaves Ulate, Evelyn Carolina; Arias Echandi, María Laura (2019)

Arcobacter and Campylobacter genres are pathogenic microorganisms associated with gastrointestinal diseases and their main transmission route is through food and water. Both genres have been strongly associated to poultry, ...

5,5-Diphenyl-cis-penta-2,4-dienoic acid

Pineda Cedeño, Leslie William; Amey, Adam R.; Cabezas Pizarro, Jorge A. (2019)

In the title compound, C17H14O2, the dihedral angle between the phenyl rings is 76.52 (7)°. In the crystal, pairwise O—H⋯O hydrogen bonds link the molecules into carboxylic acid inversion dimers.

N-[3-(Prop-1-yn-1-yl)phenyl]benzenesulfonamide

Pineda Cedeño, Leslie William; Cabezas Pizarro, Jorge A. (2019)

In the title sulfanilamide derivative, C15H13NO2S, which shows significant activity against Staphylococcus aureus and Escherichia coli, the dihedral angle between the planes of the aromatic rings is 62.15 (19)° and the ...

A Facile Method for the Titration of Organolithium Reagents using Naphtylamine or Naphtylmethylamine as Indicators

Cabezas Pizarro, Jorge A. (2019)

A simple method for the titration of alkyllithiums with sec-butanol, using naphtylamine or naphtylmethylamine as color indicator, is reported. Both amines gave sharp-end points, easily determined by color changes from ...

One-Pot Conversion of Aldehydes and Ketones into 1-Substituted and 1,4-Disubstituted 1,3-Enynes

Cabezas Pizarro, Jorge A.; Poveda Rojas, Rebeca; Brenes Jiménez, José Ángel (2018)

Sequential treatment of 2,3-dichloropropene with magnesium and n-BuLi generates the operational equivalent of 1,3-dilithiopropyne, which upon treatment with aldehydes or ketones, produces the corresponding alkoxy lithium ...

Synthesis and Biological Activity of New Antifungal Compounds: A Preliminary Study

Cabezas Pizarro, Jorge A.; Brenes Jiménez, José Ángel; Gross, Norma Teresa; Arias Echandi, María Laura (2018)

In the present study, we synthesized three 1,3-enynes from their corresponding aldehydes. They exhibited antifungal activity, which was evaluated against Trichophyton rubrum, the most common dermatophyte responsible for ...

Description of the nest and eggs of the green thorntail (discosura conversii)

Sánchez Pérez, Julio E.; Conejo Barboza, Karla; Sánchez, César; Calderón Franco, Diego; Sandoval Vargas, Luis Andrés (2016-06-15)

The breeding biology of the genus Discosura (Trochilidae) is poorly known. Here, we describe in detail the nest and eggs of the Green Thorntail (D. conversii). We analyze two nests; one was collected with two eggs at Limón ...

Recensión del libro: Recensión del libro Social Entrepreneurship and Innovation de Ken Bankss

Sandoval Álvarez, Carlos (2020-06-24)

Los problemas más desafiantes del mundo están siendo asumidos por personas motivadas por su pasión personal, informadas por la comprensión profunda de las realidades locales y moldeadas por su frustración por las soluciones ...

International Performance of Small and Medium-Sized Firms: The role of Proactiveness, International Experience and Networks Authors

Sandoval Álvarez, Carlos (2022-11-06)

The objective of this research is to examine the effect of proactive managerial behavior and international business networks on three dimensions of international performance exhibited by an SME. Specifically, the export ...