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Mostrando ítems 931-950 de 3121
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Documentation of floral secretory glands in Pleurothallidinae (Orchidaceae) using Scanning Electron Microscopy (SEM)
(2016-11-20)A clear, step by step description of the treatment of orchid flowers, subtribe Pleurothallidinae, with Critical Point Drying for SEM is presented. It shows that a simple, short fixation and dehydration method prior to ... -
Does a polyphagous caterpillar have the same gut microbiota when feeding on different species of food plants?
(Revista de Biología Tropical 50(2): 547-560, 2002, 2002)We used classical culture techniques to explore gut bacteria and changes associated with dietary change in the highly polyphagous, tropical caterpillar Automeris zugana(Saturniidae). Fifty-five third instar wild-caught ... -
Does Estuary Restoration Design Alter the Fine Scale Movements of Gray Smoothhounds (Mustelus californicus) in Southern California?
(2017)Restored estuaries in southern California are limited in size and shape by fragmentation from human development, which can in turn restrict habitat use. Thus, it is important to assess how habitat design affects how fish ... -
Does habitat loss affect tropical myxomycetes?
(2014-10-29)The effect of habitat loss on the dynamics of myxomycete assemblages has been poorly studied thus far. For this reason, a premontane moist forest surrounded by human-created pastures on the Caribbean slope of Costa Rica ... -
Does the distance to forests or buildings influence great kiskadee (Pitangus sulphuratus) nesting site selection?
(2021)The expansion of human settlements has produced significant changes in natural ecosystems by fragmenting and reducing their area. Those changes influence the availability of natural and artificial sites used to build nests ... -
Domain Decomposition Methods for Problems in H(curl)
(2015-05)Two domain decomposition methods for solving vector field problems posed in H(curl) and discretized with Nedelec finite elements are considered. These finite elements are conforming in H(curl). A two-level overlapping ... -
Dopant-Free Hole-Transport Materials with Germanium Compounds Bearing Pseudohalide and Chalcogenide Moieties for Perovskite Solar Cells
(2020-10-04)Hole-transport materials (HTMs) are key electronic components for the functioning of perovskite solar cells (PSCs) as they extract the photogenerated holes from the perovskite to be transported subsequently to the back ... -
Dos especies nuevas de Orthothrips Priesner (Thysanoptera: Phlaeothripidae) en Costa Rica
(Métodos en Ecología y Sistemática (MES), vol. 3, n. 3, 2008, 2008)Se describen dos especies nuevas pertenecientes al género Orthothrips Priesner en Costa Rica. Estas especies están estrechamente relacionadas con O. boneti Stannard, O. dubius Stannard y O. tepoztlanensis Johansen, sin ... -
Dos propuestas de clasificación climática para la vertiente Caribe costarricense según el sistema de Thornthwaite
(2017-01)Una alta variabilidad espacio-temporal en la temperatura y la precipitación son características del territorio costarricense, con una diferencia climática fuerte entre las dos vertientes, la Pacífica y el Caribe. La primera ... -
Dose distribution for CBCT as an aid for radiation protection in dentistry
(2023)To characterize effective dose distributions in the craniofacial area for different acquisition parameters of dental cone beam CT, thermoluminescent dosimeters (TLD) were placed within an anthropomorphic phantom for ... -
Dosimeter arrangement for effective dose and isodose curves desterminations into craniofacial cavity
(2023)Tomographic dental imaging with cone beam computed tomography has developed so fast in Costa Rica, in the absence of investigations to determine the absorbed dose by the patients, we propose a TLD dosimeter array into RANDO ... -
Dosimetry and Toxicity Studies of the Novel Sulfonamide Derivative of Sulforhodamine 101([18f]srf101) at a Preclinical Level
(2019)Abstract: Background: The SR101 N-(3-[18F]Fluoropropyl) sulfonamide ([18F]SRF101) is a Sul forhodamine 101 derivative that was previously synthesised by our group. The fluorescent dye SR101 has been reported as a marker ... -
Downscaling With Constructed Analogues: Daily Precipitation and Temperature Fields Over The United States
(2008-01)Daily precipitation and average temperature patterns for the contiguous United States were downscaled from a 2.5 x 2.5 degree (coarse) resolution grid to a 1/8 x 1/8 degree (fine) resolution grid using a constructed‐analogues ... -
Dracontia, the little-known dragon orchids
(2011-09)The dragon orchids (genus Dracontia) represent a small group of mostly Central American species in the Pleurothallidinae. Their relatively large, uniquely shaped and diversely ornate flowers set them apart from their close ... -
Draft Genome Sequences of Two Cyanobacteria Leptolyngbya spp. Isolated from Microbial Mats in Miravalles Thermal Spring, Costa Rica
(2021)We report the draft genome sequences of Leptolyngbya sp. strain 7M and Leptolyngbya sp. strain 15MV, isolated from Miravalles Thermal Spring, Costa Rica. The thermophilic cyanobacteria exhibit unique diversity features ... -
Drinking as an epidemic - a simple mathematical model with recovery and relapse
(2007)This chapter discusses a simple mathematical model of drinking lapse. Problem drinking is modeled as an acquired state - the result of frequent or intense interactions among individuals in three drinking states within a ... -
Drone-based hyperspectral and thermal imagery for quantifying upland rice productivity and water use efficiency after biochar application
(2021-05-11)Miniature hyperspectral and thermal cameras onboard lightweight unmanned aerial vehicles (UAV) bring new opportunities for monitoring land surface variables at unprecedented fine spatial resolution with acceptable accuracy. ... -
Dry-season leaf flushing of Enterolobium cyclocarpum (ear-pod tree): above- and belowground phenology and water relations
(2007-11)Above- and belowground phenology and water relations of Enterolobium cyclocarpum Jacq. trees in the dry forest of Santa Rosa National Park, Costa Rica were studied during two consecutive phenological cycles, from November ... -
Drying kinetics as Tool for the Assessment of Dynamic Porosity of Catalyst-Support Materials
(2018)Critical drying fraction data (xc) were obtained for a series of porous materials, frequently used as supports for heterogeneous catalysts. This kinetic parameter correlates well with the secondorder rate constants for ... -
Dual Function of Chip Calls Depending on Changing Call Rate Related to Risk Level in Territorial Pairs of White-Eared Ground-Sparrows
(2017-03)Different mechanisms have been proposed for encoding information into vocalizations: variation of frequency or temporal characteristics, variation in the rate of vocalization production, and use of different vocalization ...