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Now showing items 7112-7131 of 13349
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Isolation and partial purification of a hemolytic sphingomyelin-inhibitable fraction from the sea anemone Anthopleura nigrescens
(2014-03)Actinoporins are highly hemolytic pore-forming proteins with a molecular mass of around 20 kDa and high affinity for sphingomyelin-containing membranes. On the crude extract of the sea anemone Anthopleura nigrescens, the ... -
Isolation of ammonium- and nitrite-oxidizing bacterial strains from soil, and their potential use in the reduction of nitrogen in household waste water
(Universidad de Costa Rica, 2017-12-01)Currently, nitrogen has become the main element of water pollution, causing riverine, lacustrine and coastal eutrophication. The continuous contamination of aquifers and the absence of planned water resource utilization, ... -
Isolation of toxoplasma gondii from the keel-billed toucan (Ramphastos sulfuratus) from Costa Rica
(American Society of Parasitologists, 2009-04-01)Pectoral muscles from a captive keel-billed toucan (Ramphastos sulfuratus) from Costa Rica were fed to a Toxoplasma gondii– free cat, and the cat shed oocysts. Laboratory mice fed these oocysts developed antibodies to T. ... -
Isolation on a remote island: genetic and morphological differentiation of a cosmopolitan odonate
(Nature Publishing Group, 2019-06-01)Although low levels of genetic structure are expected in highly widespread species, geographical and/or ecological factors can limit species distributions and promote population structure and morphological differentiation. ... -
Isolation, detection and characterization of swine hepatitis E virus from herds in Costa Rica
(Taylor & Francis, 2008-06)Although swine HEV isolates from North America, Europe, and Asia have been genetically characterized, little is known about the strains presumed to be circulating in Latin America. In this study, seven commercial swine ... -
Isolation, detection and characterization of swine hepatitis E virus from herds in Costa Rica
(Taylor & Francis, 2008)Although swine HEV isolates from North America, Europe, and Asia have been genetically characterized, little is known about the strains presumed to be circulating in Latin America. In this study, seven commercial swine ... -
Isolierung von Coronaviren in der Zellkultur aus Nasentupferproben atemwegskranker Kalber in der Bundesrepublik Deutschland
(Paul Parey Scientific Publishers, 1989)Isolation in tissue culture of coronavirus from respiratory diseased calves in the FRG Coronavirus was isolated in HRT-IS tissue culture from nasal swabs of 4 from 15 calves showing respiratory symptoms. The strains ... -
Isomerization of fatty acids: A cellular barrier mechanism in nanotechnology?
(Journal of Nanoscience and Nanotechnology Vol.17 1-9, 2017-01)This work is a kinetic study of the coupling reaction of 2-mercaptoethanol with methyl undecenoate and with methyl oleate through " click " chemistry. Reversibility and reactivity of each system were followed through Fourier ... -
Isotope hydrology and baseflow geochemistry in natural and human-altered watersheds in the Inland Pacific Northwest, USA
(2015-02-18)This study presents a stable isotope hydrology and geochemical analysis in the inland Pacific Northwest (PNW) of the USA. Isotope ratios were used to estimate mean transit times (MTTs) in natural and human-altered watersheds ... -
Isotope hydrology of a tropical coffee agroforestry watershed: Seasonal and event-based analyses
(Wiley & Sons, 2018)Stable isotope variations are extremely useful for flow partitioning within the hydrologic cycle but remain poorly understood throughout the tropics, particularly in watersheds with rapidly infiltrating soils, such as ... -
Isotopic composition and major ion concentrations of national and international bottled waters in Costa Rica
(Elsevier (Países Bajos), 2021)Global bottled water consumption has largely increased (14.35 billion gallons in 2020) [1], [2], [3], [4], [5] during the last decade since consumers are demanding healthier and safer forms of rehydration. Bottled water ... -
Isotopic composition in precipitation and groundwater in the northern mountainous region of the Central Valley of Costa Rica
(Taylor & Francis, 2016)The linkage between precipitation and recharge is still poorlyunderstood in the Central America region. This study focuses onstable isotopic composition in precipitation and groundwater in the northern mountainous region ... -
Isotopic variability (δ18O, δ2 H and d-excess) during rainfall events of the north American monsoon across the Sonora River Basin, Mexico
(Elsevier Ltd, 2021)The economic activities of the Sonora strongly depend on groundwater extraction, which is generally of recent meteoric origin. Understanding the hydrological functioning in this semi-arid region, located in northwestern Mexico, ... -
Istmica
(Universidad Nacional, Costa Rica, 2003) -
Itinerario Trans: una aproximación autobiográfica desde la escultura blanda al cuerpo y la identidad trans como un ejercicio de politización de lo privado.
(Universidad Nacional, 2022-03-17)El sistema dominante presente en la sociedad se encuentra regido por un orden político, social y cultural llamado heteronormatividad, el cual designa la heterosexualidad como la única forma de sexualidad natural, apoyado ... -
IV Jornadas ScienCity 2021: Índice para ciudades inteligentes y sostenibles: el caso de Costa Rica
(ScienCity Universidad de Huelva, 2021-11-17)IV Jornadas ScienCity 2021, participación del señor Olman Segura Bonilla en representación del Centro Internacional de Política Económica para el Desarrollo Sostenible (CINPE), mediante la ponencia titulada "Índice para ... -
IV Seminario internacional por los derechos de los niños niñas y adolescentes el derecho a la educación en tiempos de pandemia
(Universidad Nacional, Costa Rica, 2021-09-28)Conversatorio que cuenta con la participación de reconocidos investigadores sobre el tema de niñez y adolescencia. -
IVA ¿Quién gana? y ¿Quién pierde?
(La República, 2019-06-14)El impuesto al valor agregado IVA se empezará a cobrar este mes de julio, forma parte de la nueva legislación tributaria aprobada en el 2018, con una amplia mayoría en la Asamblea Legislativa y representa, un primer paso ... -
La izquierda tras el triunfo de Occidente
(Editorial de la Universidad Nacional, 1998-12)Realiza un interesante recorrido de los acontecimientos políticos más significativos de lo que denomina «la revolución centroeuropea de 1989». La óptica es esencialmente europea y particularmente alemana. En este sentido, ... -
Índice de ciudades inteligentes y sostenibles para 10 ciudades en el contexto actual de Costa Rica
(Environment & Technology, 2022-12-14)El objetivo de la presente investigación es construir y aplicar un índice que permita resumir dimensiones e indicadores relacionados con ciudades inteligentes y sostenibles en el contexto actual para Costa Rica y otros ...