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Mostrando publicaciones 251-260 de 261
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 ...
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 ...
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, ...
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. ...
Can simulation tasks reproduce the taekwondo match physiological responses?
(2018)
Background and Study Aim: Using specific training methods is an important aspect in the preparation of taekwondo athletes. The purpose of the present study is the knowledge about physiological responses, during three ...
Vibrational and optical properties of CZTS derivatives for photovoltaic applications: synthesis of Cu2ZnSn1-xGexS2Se2 compounds
(2018)
Herein, we report the vibrational and optical properties of new Cu2ZnSn1-xGexS2Se2 solid solutions prepared by isomorphic substitution of a fraction of Se by S in Cu2ZnSn1-xGexSe4 (CZTGeSe) through ceramic method. The Raman ...
Electrical and optical properties of p-type Ag0.3Cu0.7InQ2 chalcopyrite semiconductors
(2018)
We report the synthesis, characterization and electrical properties of Ag0.3Cu0.7InS2, Ag0.3Cu0.7InSe2 and Ag0.3Cu0.7InTe2. These solid solutions were synthesized via microwave-assisted solid-state reactions. Powder X-ray ...
Polyaniline based materials as a method to eliminate haloanisoles in spirits beverages
(2018)
In this research, the abilities of two polyaniline-based materials (PANI-EB and PANI-ES) were evaluated as potential fining agents to eliminate 2,4,6-trichloroanisole (TCA) and 2,4,6-tribromoanisole (TBA). The results ...
Taxonomic revision of Lepidura Townes, 1971 (Hymenoptera: Ichneumonidae: Mesochorinae) with the description of three new species, new distribution records and a key to the all known species
(2018)
A taxonomic review of Lepidura Townes is presented, with three new species described. The following species are recognized: L. abbreviata Dasch, L. callaina Dasch, L. collaris Townes, L. improcera Dasch, L. mallecoensis ...
Mariátegui y el socialismo indo-americano: entre sujeto histórico y misticismo revolucionario
(2018)
El pensamiento marxista y crítico latinoamericano tiene entre sus más connotados representantes al peruano José Carlos Mariátegui, creador de una prolífica y renovadora obra en la cual funde y supera dialécticamente una ...