Universidad de Costa Rica
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo Depositar
  • Políticas
  • Contacto
    • español
    • English
  • English 
    • español
    • English
  • Login
Search 
  •   Kérwá Home
  • Investigación
  • Ciencias básicas
  • Química
  • Search
  •   Kérwá Home
  • Investigación
  • Ciencias básicas
  • Química
  • Search
JavaScript is disabled for your browser. Some features of this site may not work without it.

Search

Show Advanced FiltersHide Advanced Filters

Filters

Use filters to refine the search results.

Now showing items 1-10 of 86

  • Sort Options:
  • Relevance
  • Title Asc
  • Title Desc
  • Issue Date Asc
  • Issue Date Desc
  • Results Per Page:
  • 5
  • 10
  • 20
  • 40
  • 60
  • 80
  • 100
Thumbnail

The Bacterial Product Violacein Exerts an Immunostimulatory Effect Via TLR8 

Venegas Solís, Francisco A.; Köllisch, Gabriele; Mark, Kerstin; Diederich, Wibke E.; Kaufmann, Andreas; Bauer, Stefan; Chavarría Vargas, Max; Araya Barrantes, Juan José; García Piñeres, Alfonso J. (2019)
Violacein, an indole-derived, purple-colored natural pigment isolated from Chromobacterium violaceum has shown multiple biological activities. In this work, we studied the effect of violacein in different immune cell lines, ...
Thumbnail

Direct functionalization of Mn12-(methacrylate) clusters on Si(100): surface characterization and electrochemical properties 

Ledezma Gairaud, Marisol; Moehl, Thomas; Montero Villalobos, Mavis Lili; Pineda Cedeño, Leslie William (2016-09)
The reaction of H–terminated Si(100) with methacrylate–substituted manganese carboxylate clusters [Mn12O12{CH2C(CH3)COO}16(H2O)4], [Mn12–(methacrylate)] via hydrosilylation afforded Mn12–(methacrylate)−Si(100). The chemically ...
Thumbnail

Three new species of Gliocephalotrichum causing fruit rot on different hosts from Brazil 

Pereira de Almeida, Camila; da Silva, Rildo Alexandre Fernandes; Reis, Ailton; Mendes Aguiar, Frederick; Chaverri Echandi, Priscila; Batista Pinho, Danilo (2020-09-18)
The genus Gliocephalotrichum (Nectriaceae), originally described as a soil-borne fungus, has been associated with postharvest diseases, especially of tropical fruits. Taxonomic studies using both morphological and molecular ...

The role of chloramine species in NDMA formation 

Selbes, Meric; Beita Sandí, Wilson; Kim, Daekyun; Karanfil, Tanju (2018-09)
N-nitrosodimethylamine (NDMA), a probable human carcinogen disinfection by-product, has been detected in chloraminated drinking water systems. Understanding its formation over time is important to control NDMA levels in ...
Thumbnail

Identification of polyphenols from antiviral Chamaecrista nictitans extract using high-resolution LC–ESI–MS/MS 

Mateos Martín, María Luisa; Fuguet, Elisabet; Jiménez Ardón, Allan Miguel; Herrero Uribe, Libia; Tamayo Castillo, Giselle; Torres, Josep Lluís (2014)
Chamaecrista nictitans (L) extract possesses antiviral properties; it acts against the herpes simplex virus, and this may be attributed to its constituent phenolics. Here, high-resolution LC–ESI–MS/MS is used to identify ...

From Ideality to Simplicity: A Robust and Affordable Hydrogen Reference Electrode 

Durán Chaves, Michelle; Sanabria Chinchilla, Jean (2020-02-01)
In electrochemistry, the concept of a reference electrode is fundamental. Introductory courses might mention the standard hydrogen electrode (SHE), its working principle, and its theoretical design; however, chances are ...
Thumbnail

Light Reflection by Cuticles of Chrysina Jewel Scarabs: Optical Measurements, Morphology Characterization, and Theoretical Modeling 

Vargas Castro, William E.; Hernández Jiménez, Marcela; Libby Hernández, Eduardo; Azofeifa Alvarado, Daniel E.; Barboza Aguilar, Cinthya; Solís Blanco, Ángel Arturo (2016)
Cuticles of some Chrysina scarabs are characterized by flat, graded, and twisted structures of nanosized chitin fibrils. As inferred from SEM images, each species has its own spatial period or pitch P which is dependent ...
Thumbnail

Neutral organic redox pairs based on sterically hindered hydroquinone/benzoquinone derivatives for dye-sensitized solar cells 

Flores Díaz, Natalie; Soto Navarro, Andrea; Freitag, Marina; Lamoureux Lamontagne, Guy; Pineda Cedeño, Leslie William (2018-06)
Substituted derivatives of hydroquinone/benzoquinone were studied as organic redox mediators in the electrolyte for dye-sensitized solar cells (DSSCs). Thus, di-tert-butylhydroquinone (DTHQ), thymohydroquinone (ThymHQ) and ...
Thumbnail

Rapid Determination of the ‘Legal Highs’ 4-MMC and 4-MEC by Spectroelectrochemistry: Simultaneous Cyclic Voltammetry and In Situ Surface-Enhanced Raman Spectroscopy 

González Hernández, Jerson; Ott, Colby Edward; Arcos Martínez, María Julia; Colina, Álvaro; Heras, Aránzazu; Alvarado Gámez, Ana Lorena; Urcuyo Solórzano, Roberto; Arroyo Mora, Luis E. (2021-12-31)
The synthetic cathinones mephedrone (4-MMC) and 4-methylethcathinone (4-MEC) are two designer drugs that represent the rise and fall effect of this drug category within the stimulants market and are still available in ...

Dye‐sensitized Devices: Photovoltaic and Photoelectrolytic Applications 

Solera Rojas, José Andrés; Ledezma Gairaud, Marisol; Pineda Cedeño, Leslie William (2018-11)
Dye‐sensitized approach along with stability and surface robustness in titanium dioxide (TiO2) against photocorrosion and degradation has been widely studied and applied in several important applications. This chapter ...
  • 1
  • 2
  • 3
  • 4
  • . . .
  • 9

  • Repositorios universitarios

  • Repositorio del SIBDI-UCR
  • Biblioteca Digital del CIICLA
  • Repositorio Documental Rafael Obregón Loría (CIHAC)
  • Biblioteca Digital Carlos Melendez (CIHAC)
  • Repositorio de Fotografías
  • Colección de videos de UPA-VAS
  • Sitios recomendados

  • Buscador regional de LA Referencia
  • Buscador del Open ROAR
  • Scientific Electronic Library Online (SciELO)
  • Directory of Open Access Journals (DOAJ)
  • Redalyc
  • Redes sociales

  • facebook.com/repositoriokerwa
  • @Ciencia_UCR
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo depositar
  • Políticas
Contact Us | Send Feedback
Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.
 

 

Browse

All of KérwáCommunities & CollectionsTitlesAuthorsSubjectsProcedenceTypeThis CollectionTitlesAuthorsSubjectsProcedenceType

My Account

LoginRegister

Discover

AuthorPineda Cedeño, Leslie William (25)Cabezas Pizarro, Jorge A. (14)Chavarría Vargas, Max (9)Tamayo Castillo, Giselle (9)Lamoureux Lamontagne, Guy (7)Arias Echandi, María Laura (6)Avendaño Vega, Roberto (6)Ledezma Gairaud, Marisol (6)Beita Sandí, Wilson (4)Cicció Alberti, José Francisco (4)... View MoreTypeartículo científico (80)artículo preliminar (1)capítulo de libro (1)contribución de congreso (1)libro (1)preprint (1)reporte técnico (1)Procedence
Vicerrectoría de Docencia (86)
Vicerrectoría de Investigación (86)
... View MoreHas File(s)Yes (79)No (7)

  • Repositorios universitarios

  • Repositorio del SIBDI-UCR
  • Biblioteca Digital del CIICLA
  • Repositorio Documental Rafael Obregón Loría (CIHAC)
  • Biblioteca Digital Carlos Melendez (CIHAC)
  • Repositorio de Fotografías
  • Colección de videos de UPA-VAS
  • Sitios recomendados

  • Buscador regional de LA Referencia
  • Buscador del Open ROAR
  • Scientific Electronic Library Online (SciELO)
  • Directory of Open Access Journals (DOAJ)
  • Redalyc
  • Redes sociales

  • facebook.com/repositoriokerwa
  • @Ciencia_UCR
  • Sobre Kérwá
  • Acceso Abierto
  • Cómo depositar
  • Políticas
Contact Us | Send Feedback
Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.