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Mostrando ítems 81-90 de 154
Nuevos registros de helechos y coníferas del Cretácico inferior en La Cuenca del Valle Superior del Magdalena, ColombiaNew records of ferns and conifers from the lower cretaceous in the upper magdalena valley basin, Colombia
(Universidad Industrial de Santander, 2016-10)
En este trabajo se describen nuevos registros de la macroflora del Cretácico Inferior (Aptiano-Albiano) de Colombia. El material estudiado fue colectado en la Cuenca del Valle Superior del Magdalena en tres localidades del ...
Problemática del gusano barrenador del ganado, Co chl i omy i a homini v o r a x (Coquerel , 1858) en Colombia
(Universidad de Córdoba, 2008)
Evidence for a histaminergic system in the human testis
(Elsevier Science Inc, 2005-12)
The complete lack of information about mast cells as a source of histamine and potential target cells for histamine in human testes prompted us to investigate these issues in testes of fertile and infertile patients using ...
Nest-departure behaviour of gynes and drones in the invasive yellowjacket Vespula germanica (Hymenoptera: Vespidae)
(Cambridge University Press, 2020-08)
Inbreeding costs can be high in haplodiploid hymenopterans due to their particular mechanism of sex determination (i.e., single-locus complementary sex-determination system, sl-CSD), as it can lead to the production of ...
Fossil record of Ephedra in the Lower Cretaceous (Aptian), Argentina
(Springer Tokyo, 2017-11)
Fossil plants from the Lower Cretaceous (upper Aptian) of the La Cantera Formation, Argentina, are described. The fossils studied represent a leafy shooting system with several orders of articulated and striated axes and ...
Micropropagation of Onion (Allium cepa L.) from Immature Inflorescences
(Humana Press, 2013)
In vitro plant production by direct organogenesis from immature flower heads is an ideal approach for clonal propagation of onions (Allium cepa L.). This technique ensures genetic stability, high propagation rate, and ...
Chusquea limensis (Poaceae, Bambusoideae, Bambuseae), a new species from the western Andes of Peru
(Magnolia Press, 2019-12-02)
A new, narrowly endemic species from the Andean western slopes of central Peru, Chusquea limensis (Poaceae, Bambusoideae, Bambuseae), is described and illustrated. Identification keys and a comparative table based on ...
Yeast derivatives and wheat germ in the adult diet modulates fecundity in a tephritid pest
(Cambridge University Press, 2019-04)
Anastrepha fraterculus (Wiedemann), a pest of great economic importance in South America, needs urgently to be controlled by environmentally friendly methods such as the sterile insect technique for which mass rearing of ...
A Potential Role for Phenotypic Plasticity in Invasions and Declines of Social Insects
(Frontiers Media S.A., 2019-10)
Eusociality, a form of animal social organization involving sterile and reproductive castes, is a rare, but highly ecologically successful form of life. There are striking examples of eusocial species with populations that ...
Heat-hardening effects on mating success at high temperature in Drosophila melanogaster
(Pergamon-Elsevier Science Ltd, 2019-02)
Reproduction is strongly influenced by environmental temperature in insects. At high temperature, mating success could be influenced not only by basal (non-inducible) thermotolerance but also by inducible plastic responses. ...