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Purificación y cuantificación de glicerina cruda y adaptación del método ASTM D6584 para la determinación de glicerina en biodiesel
(2014-07-07)In this paper an analytical method is validated for the purification and quantification of the content of glycerol in samples of crude oil from the production of biodiesel fuel. We compared the purity of the glycerol present ... -
"Purificarse en las aguas del Jordán". La ruta política y social de la amnistía de 1955 en Costa Rica y la participación de las mujeres
(2020)En este artículo se reconstruye la ruta política y social que conlleva a la declaración de una primera amnistía general después de la guerra civil de 1948 en Costa Rica. A partir de fuentes oficiales y ... -
Purification and characterization of BaH4, a hemorrhagic metalloproteinase from the venom of the snake Bothrops asper
(2000-01)A hemorrhagic metalloproteinase, named BaH4, was isolated from the venom of the snake Bothrops asper by a combination of ion-exchange chromatography on DEAE-Sepharose and gel filtration on Sephacryl S-200. BaH4 is a 69 kDa ... -
Purification and characterization of myotoxin IV, a phospholipase A2 variant, from Bothrops asper snake venom
(1995)A basic myotoxic protein was purified from Bothrops asper venom. Like other basic Bothrops myotoxins, myotoxin IV induces acute muscle damage after intramuscular injection in mice and disrupts negatively charged liposomes ... -
Purification of equine whole IgG snake antivenom by using an aqueous two phase system as a primary purification step
(2015-01)There is a need to introduce innovations in the manufacture of snake antivenoms to increase the supply of these products worldwide. In this work, the fractionation of equine hyperimmune plasma with a new methodology that ... -
Purification of IgG and albumin from human plasma by aqueous two phase system fractionation
(2012-08)The current shortages in human plasma products at global levels justify the development of new, cost effective plasma fractionation methods. We have developed a fractionation process to obtain immunoglobulin G (IgG) and ... -
Purpureocillium roseum sp. nov. A new ocular pathogen for humans and mice resistant to antifungals
(2020)Background Infectious keratitis is the main cause of preventable blindness worldwide, with about 1.5–2.0 million new cases occurring per year. This inflammatory response may be due to infections caused by bacteria, fungi, ... -
Pushing cylinders: Expanding on object-based manipulation
(2020-07)Competent assistant robots need to understand their environment to be able to perform skilled manipulation tasks. One way of achieving it is to have knowledge about the physical behaviour of objects and how they respond ... -
Putas, invisibles e incurables: categorías identitarias emergentes, resistencia y emancipación en Costa Rica a inicios del siglo XXI
(2016)En Costa Rica, tres eventos han tenido lugar en los últimos tres años (2011-2013) que ponen en evidencia una disputa cultural, política y ética acerca de la diversidad sexo/genérica, que denuncian la opresión contra ... -
Putting into action the REGCM4.6 regional climate model for the study of climate change, variability and modeling over Central America and Mexico
(2018)What: International experts and attendees from several countries of Central America, Mexico, the Caribbean (CAM), and South America (SA) met to discuss regional issues on climate variability and climate change to learn the ... -
Putting universalism to the service of social justice: Can two-tiered systems be avoided?
(Oxford University Libraries, 2014)Las elecciones salvadoreñas de 2009 le dieron al partido de izquierda acceso al poder por primera vez en la historia solo 20 años después de un derramamiento de sangre por la tierra y las oportunidades. Para honrar su ... -
PV-Battery Integrated Module as a Solution for Off-Grid Applications in the Developing World
(2018-06-03)The coupling of solar panels and energy storage is inevitable and especially pertinent in places with no access to the electricity grid. This combination must be modular, providing the opportunity to scale up the system ... -
QA Programme of the TLD laboratory of the University of Costa Rica: IEC 61066 testing
(2008)The Thermoluminescence Personal Dosimetry Laboratory of the University of Costa Rica provides dose measurements for around 90% of occupational radiation workers in the country. The assessment of doses to workers routinely ... -
Qbo Robot as an Educational Assistant - Participants Feedback on the Engagement Level Achieved with a Robot in the Classroom
(2019)A non-humanoid robot is used to assist in an educational workshop of Quality Assurance and DevOps. The goal of this research was to determine the level of engagement shown by students of computer science in a presentation ... -
Quadratic Hamiltonians in phase-space quantum mechanics
(1989-07)The dynamical evolution is described within the phase-space formalism by means of the Moyal propagator, which is the symbol of the evolution operator. Quadratic Hamiltonians on the phase space are distinguished in that ...