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Mostrando ítems 18971-18990 de 19080
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What skills and knowledge do university mathematics teacher education programs give future teachers in Costa Rica?
(2020)High-quality teaching is crucial for improving mathematics education. Teaching mathematics requires specific knowledge, including knowledge of both content and pedagogy. In this study, we analyzed the knowledge for ... -
What’s in a mass
(2021-04)This short essay pretends to make the reader reflect on the concept of biological mass and on the added value that the determination of this molecular property of a protein brings to the interpretation of evolutionary and ... -
What’s the date?
(2022)Rafaël Govaerts, Adam P Karremans and Julian Shaw go to lengths to establish the effective publication dates of some orchid names in the journal Revista Guatemalensis -
When a little is enough: cocoon web of Kapogea cyrtophoroides (Araneae: Araneidae) induced by Hymenoepimecis heidyae (Ichneumonidae: Pimplinae)
(2018)The final instar larvae of the koinobiont ectoparasitoids in the Polysphincta group of genera induce their host spiders to construct webs that protect the wasp pupa during its development. It has been hypothesized that ... -
When genes move farther than offspring: gene flow by male gamete dispersal in the highly philopatric bat species Thyroptera tricolor
(2013-11)For species characterized by philopatry of both sexes, mate selection represents an important behaviour for inbreeding avoidance, yet the implications for gene flow are rarely quantified. Here, we present evidence of male ... -
When the absence of evidence is not the evidence of absence: Nasa (Loasaceae) rediscoveries from Peru and Ecuador, and the contribution of community science networks
(2023)Documentation of plant taxa has long been subject to the temporal and spatial selectivity of professional research expeditions, especially in tropical regions. Therefore, rare and/or narrowly endemic species are sometimes ... -
Which variables influence the succession process on family farms? A literature review
(2020-12-23)The decrease in family farm succession is a problem in many countries worldwide. However, no systematic compilation of relevant studies exists. The method of analysis described in this article enabled us to obtain descriptive ... -
Who Cares in Nicaragua? A Care Regime in an Exclusionary Social Policy Context
(2011-09-14)In Latin American countries with historically strong social policy regimes (such as those in the Southern Cone), neoliberal policies are usually blamed for the increased burden of female unpaid work. However, studying the ... -
Why and How to Build Universal Social Policy in the South
(2018-06-15)In Confronting Dystopia, a distinguished group of scholars analyze the implications of the ongoing technological revolution for jobs, working conditions, and income. Focusing on the economic and political implications of ... -
Why is the electrocaloric effect so small in ferroelectrics?
(2016-05-19)Ferroelectrics are attractive candidate materials for environmentally friendly solid state refrigeration free of greenhouse gases. Their thermal response upon variations of external electric fields is largest in the vicinity ... -
Why myotoxin-containing snake venoms possess powerful nucleotidases?
(2013-01-25)The venom of the snake Bothrops asper causes muscle necrosis, pain and inflammation. This venom contains myotoxins which cause an increase in intracellular Ca2+ concentration and release of K+ and ATP from myotubes. ATP ... -
Widespread local chronic stressors in Caribbean coastal habitats
(2017)Coastal ecosystems and the livelihoods they support are threatened by stressors acting at global and local scales. Here we used the data produced by the Caribbean Coastal Marine Productivity program (CARICOMP), the longest, ... -
Widespread Occurrence of Black-Orange-Black Color Pattern in Hymenoptera
(2019)Certain color patterns in insects show convergent evolution reflecting potentially important biological functions, for example, aposematism and mimicry. This phenomenon has been most frequently documented in Lepidoptera and ... -
Widespread tropical agrowastes as novel feedstocks for biochar production: characterization and priority environmental uses
(2020)Biochar, a carbon-rich pyrolytic product, has demonstrated positive results as a soil improver and carbon sequestration agent. Its production could be an appropriate and innovative practice for agricultural waste management ... -
William C. Burger (1932-2022), uno de los grandes en la florística de Costa Rica
(2023-10-06)El botánico estadounidense William C. Burger (1932-2022) fue uno de los principales estudiosos de la flora de Costa Rica en el siglo XX. Él trabajó en Field Museum, Chicago. En Costa Rica hizo numerosos viajes de exploración ... -
Willingness and performance of older adults using Information and Communication Technologies for cognitive activity and social interaction
(2018)This study is part of a project aimed at designing a learning intervention to enable older Costa Ricans to use Informa- tion and Communication Technologies (ICT) for enhancing cognitive activity and social interaction. ... -
Wind creates crown shyness, asymmetry, and orientation in a tropical montane oak forest
(2020)In a cloud forest dominated by Quercus costaricensis, the gap size between the crowns was consistent and crowns were asymmetrical, being elongated perpendicular to the prevailing wind direction. A wind storm of 20 m/s ... -
With great biodiversity comes great responsibility: The underestimated diversity of Epidendrum (Orchidaceae)
(2021-12-31)Epidendrum (orchidaceae) has been suggested to be a promising model system for evolutionary and ecological studies in the neotropical region. given its species diversity, the broad biogeographical and ecological range, and ...