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Evaluation of three chroroplastic markers for barcoding and for phylogenetic reconstruction purposes in native plants of Costa Rica
(2012-11-26)
DNA barcoding has been proposed as a practical and standardized tool for species identification. However, the determination of the appropriate marker DNA regions is still a major ...
Sismicidad y fallamiento en la zona de Arenal-Miramar
(2011-02-01)
A review of the local tectonic frame was made, focusing on the faulting of The Tilaran Ridge and Montes de Aguacate. On a map of faults we plot historic and recent seismicity which was taken from Rojas (1993) and data bases ...
Manejo responsable de los desechos radiactivos en la Universidad de Costa Rica
(2009-01-13)
The Radiation Safety Program (RSP) of the University of Costa Rica established in 1990, handles the radioactive waste generated at the University. A centralized storage waste room is used by the Atomic, Nuclear and Molecular ...
On the right commutativity of loop rings
(2011-02-11)
Its proved that extra loops and central loops are conjugated closed, consequently they are G-loops. It is also proved that extra loops and central loops are M-loops.
Soluciones de Einstein no asintóticamente planas
Soluciones de Einstein no asintóticamente planas
(2011-02-11)
In this paper, a theorem id demostrated regarding the imposibility of the existence od asymptotically plane solutions in spaces with static cylindrycal symmetry, in the framework of the General Theory of Relativity, if the ...
Niveles de radioactividad en tres regiones de Costa Rica
Niveles de radioactividad en tres regiones de Costa Rica
(2011-02-15)
The establishment of the first radioactivity levels of natural radiation was carried out during the period 1991 to 1994 in three different regions of Costa Rica. The radionuclides studied belong to different soil types ...
Algunas características de las mareas en la costa Pacífica y Caribe de Centroamérica
(2006)
Tidal levels were studied in 48 stations using tidal predictions along the coasts
of the Pacific and Caribbean of Central America. Statistics of basic mean values
were analyzed to characterize the stations. These ...
COMPARACIÓN DE METODOLOGÍAS DE EXTRACCIÓN PARA LIMONENO Y CARVONA EN Lippia alba USANDO CROMATOGRAFÍA DE GASES.
Comparación de metodologías de extracción para limoneno y carvona en lippia alba usando cromatografía de gases.
(2012-11-26)
Abstract Different plants drying procedures, hydrodistillation and solvent extraction by sonication were evaluated for the essential oil extraction of Lippia alba. Quantitative ...
Acerca de si pudo o no ser el universo anisotrótipico
Acerca de si pudo o no ser el universo anisotrótipico
(2011-02-15)
The theoretical and experimetnal problem concerning the origin and formations of the universe is establish in this paper, specially by developing some theories that try to explain this phenomena, and also to settle the ...
Nuevo método para la obtención de quitina
(2009-04-29)
A simple method for the isolation of chitin is described. It is based on the solubility of the biopolymer in concentrated aqueous HCl at low temperature. The solubility diagram of the system chitin-HCl-H2O is discussed as ...