Producción Académica: Envíos recientes
Mostrando publicaciones 1901-1920 de 3852
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A new technique in the excavation of ground-nest bee burrows (Hymenoptera: Apoidea)
(2018)Bees have a diversified natural history, thus the methods applied to study such diversity are varied. When it comes to studies of nesting biology, bees which nest in pre-existing cavities have been reasonably well studied ...
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Body-size variation across environmental gradients in an ectothermic organism: an intraspecific approach to ecogeographic patterns
(2018)Bergmann's rule states that endothermic species from cool areas tend to have larger body sizes than those from warm areas. Allen's rule maintains that endothermic species from cool environments should have shorter extremities ...
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Pollen flow and pollinator sharing among synchronopatric species of Psychotria (Rubiaceae)
(2018)Sympatric plant species that flower at the same time in highly seasonal environments are subject to competitive interference. Many species of the genus Psychotria (Rubiaceae) are sympatric and have an aggregated flowering ...
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Ichneumonid wasps of the subfamily Mesochorinae: new replacement names, combinations and an updated key to the World genera (Hymenoptera: Ichneumonidae)
(2018)Mesochorinae is a relatively small but widely distributed subfamily of Ichneumonidae, with most species occurring in the Neotropical Region. Currently, there are two classifications in use regarding mesochorine genera, ...
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Thermodynamics sheds light on black hole dynamics
(2018)We propose to unify two a priori distinct aspects of black hole physics: their thermodynamics, and their description as point particles, which is an essential starting point in the post-Newtonian approach to their dynamics. ...
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Trade off between quantity and size of pollen grains in the heterandrous flowers of Senna pendula (Fabaceae)
(2018)Heteranthery, the presence of different types of stamens in a flower, may reduce the conflict between pollinators and plants by ensuring the resource for the pollinator without drastically affecting the availability of ...
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WHODAS 2.0 as a measure of severity of illness: results of a FLDA analysis
(2018)WHODAS 2.0 is the standard measure of disability promoted by World Health Organization whereas Clinical Global Impression (CGI) is a widely used scale for determining severity of mental illness. Although a close relationship ...
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Cancer and suicidal ideation and behaviours: protocol for a systematic review and meta-analysis
(2018)Introduction: Prevalence of suicidal ideation (SI) and behaviours are higher among patients with cancer than general population. No systematic review/meta-analysis investigated this topic; therefore, our aim will be to ...
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Hot water extraction improves the characteristics of willow and sugar maple biomass with different amount of bark
(2018)Shrub willows are being developed as a short rotation woody crop (SRWC) that can grow on marginal agricultural land. Willow has a high net energy ratio (energy produced/ fossil fuel energy consumed), low greenhouse gas ...
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Gynecological–endocrinological aspects in women carriers of BRCA1/2 gene mutations
(2018)Women carriers of mutations in the genes BRCA1 and BRCA2 coding for tumor suppressor proteins are at high risk of developing breast and ovarian cancers. Hereditary breast and ovarian cancers due to BRCA pathogenic mutations ...
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Patterns of healthy lifestyle behaviours in older adults: Findings from the Chilean National Health Survey 2009–2010
(2018)The purpose of this study was to investigate healthy lifestyle behaviours across age categories in the older population in Chile. Data from 1390 older adults (≥60 years), in the 2009–2010 Chilean National Health Survey ...
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Examining relationships between psychotic experiences and suicidal ideation in adolescents using a network approach
(2018)Background: Suicide is one of the leading causes of death in young individuals. Timely and adequate identification of individuals with suicidal ideation could prevent from suicidal behavior. Psychotic experiences (PE) have ...
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Selective and efficient arsenic recovery from water through quaternary amino-functionalized silica
(2018)The free-radical graft polymerization of acryloxyethyl-trimethylammonium chloride onto commercial silica particles was studied experimentally for extraction of arsenic ions from water. Two steps were used to graft ...
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Insect elevational specialization in a tropical biodiversity hotspot
(2018)1. Tropical montane organisms are vulnerable to climate change because of elevational specialisation, but little is known of the variability in elevational specialisation across tropical insects. 2. We assessed elevational ...
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Multicomponent reactions in ligation and bioconjugation chemistry
(2018)Multicomponent reactions (MCRs) encompass an exciting class of chemical transformations that have proven success in almost all fields of synthetic organic chemistry. These convergent procedures incorporate three or more ...
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Responsabilidad social: voluntariado universitario y comportamiento virtuoso. El caso de una ciudad de Perú
(2021)El presente trabajo tiene como propósito explorar la responsabilidad social del estudiante universitario desde la perspectiva del voluntariado como comportamiento virtuoso. Se aplicó un instrumento a una muestra (318 ...
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Anxiety, low self-esteem and a low happiness index are associated with poor school performance in chilean adolescents: a cross-sectional analysis
(2021)Objective: To analyze the relationship between anxiety, self-esteem, happiness index and primary school students’ academic performance in Chilean adolescents from the Biobío province. Methodology: 733 (46.1% girls; 12 (1.3 ...
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Importance of biotic pollination varies across common bean cultivars
(2022)Common bean (Phaseolus vulgaris L.) flowers are morphologically adapted to biotic pollination, although it is partially autogamous. We evaluated the effect of pollinator visits on pod and seed production of 14 local creole ...
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Performance, detection, contamination, compliance, and cointervention biases in rehabilitation research what are they and how can they affect the results of randomized controlled trials? basic information for junior researchers and clinicians
(2022)Bias is a systematic error that can cause distorted results leading to incorrect conclusions. Intervention bias (i.e., contamination bias, cointervention bias, compliance bias, and performance bias) and detection bias are ...
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Novel phenolic compound from southern ocean microalgae Chlorella sp. PR-1 and its antibacterial activity
(2021)Las microalgas marinas han atraído la atención de los investigadores durante siglos. El desarrollo de la investigación de las microalgas se ve favorecido principalmente debido a sus propiedades ...