Results 171 to 180 of about 2,307 (204)

Notes on ciliates (Protozoa, ciliophora) from Espeletia trees and Espeletia soils of the Andean P�ramo, with descriptions of sikorops espeletiae nov. spec. and Fragmocirrus espeletiae nov. gen., nov. spec.

Studies on Neotropical Fauna and Environment, 2000
Ciliated protozoa from the giant rosettes of Espeletia trees (Compositae) and Espeletia soils were studied in four samples each from the Andean PÝramo in Venezuela and Ecuador. Collections were analysed with the non-flooded Petri dish method, which reactivates the ciliates' resting cysts from air-dried samples.
Wilhelm Foissner
exaly   +2 more sources

Automatic Detection and Mapping of Espeletia Plants from UAV Imagery

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
This paper proposes an automatic method for detection and mapping of Espeletia plants from aerial images acquired by UAV drone. The proposed approach integrated a computer vision for automatic extraction of training zones and tested on three well-established machine learning algorithms to detect regions belonging to Espeletia plants.
Ce Zhang, Ivan Lizarazo, Flavio Prieto   +2 more
exaly   +2 more sources

Kauranoid dieterpenes in Espeletia grandiflora

Phytochemistry, 1971
Abstract The resin of Espeletia grandiflora contains (-)-kaur-16-en-19-ol, (-)-kaur-16-en-19-al (not previously isolated from natural sources), (-)-kaur-16-ene and (-)-kaur-16-en-19-oic acid.
F. Piozzi, S. Passannanti, M.P. Paternostro, V. Sprio   +3 more
exaly   +2 more sources

Adaptive radiation of Espeletia in the cold andean tropics

Trends in Ecology & Evolution, 1991
The genus Espeletia (Asteraceae) underwent an accelerated adaptive radiation in the new habitats of the high tropical Andes after the retreat of the glaciers. From the ancestral rainforest species, with tree-like forms, the genus diversified at high altitude, developing morphological and physiological adaptations to the peculiar combination of low ...
M, Monasterio, L, Sarmiento
openaire   +2 more sources

Characterization of cellulases of fungal endophytes isolated from Espeletia spp.

Journal of Microbiology, 2012
Endophytes are microorganisms that asymptomatically invade plant tissues. They can stimulate plant growth and/or provide defense against pathogen attacks through the production of secondary metabolites. Most endophyte species are still unknown, and because they may have several applications, the study of their metabolic capabilities is essential.
Luisa, Cabezas, Carolina, Calderon, Luis Miguel, Medina, Isabela, Bahamon, Martha, Cardenas, Adriana Jimena, Bernal, Andrés, Gonzalez, Silvia, Restrepo   +7 more
openaire   +2 more sources

Essential Oil of the Leaves fromEspeletia batataCuatrec

Journal of Essential Oil Research, 2001
Abstract The composition of the leaf oil of Espeletia batata Cuatrec. was analyzed by capillary GC and GC/MS. Forty-two compounds were identified corresponding to 95.6% of the oil. The major components were α-pinene (35.4%), α-thujene (12.5%), β-pinene (12.1%), limonene (8.5%), and myrcene (4.7%).
Alfredo Usubillaga, Nancy Khouri, Luis B. Rojas, Marielba Morillo   +3 more
openaire   +1 more source

Neue Hydroxyacetophenon‐Derivate aus Espeletia schultzii Wedd.

Chemische Berichte, 1973
AbstractEine erneute Untersuchung von Espeletia schultzii Wedd. zeigt, daß hier neben bereits bekannten Diterpenen das weitverbreitete Pentainen 1 und zwei neue Hydroxyacetophenon‐Derivate (8 und 9) vorkommen. Die Struktur von 8 wird durch Synthese gesichert.
Ferdinand Bohlmann, Nagabhushan Rao
openaire   +1 more source

El compostaje en procesos de restauración de frailejones de los géneros: espeletia lopezzi, espeletia ocetana, espeletia pycnophylla en la cuenca alta del Río Gameza

En la actualidad, el creciente aumento de la temperatura ha determinado cambios en los patrones de comportamiento de los patrones climatológicos, manifiestos en dos fenómenos: la variabilidad climática interanual ha venido ocasionando aumentos en la temperatura de hasta 0.5 ºC y disminuciones en la precipitación de hasta 60 % durante El Niño y ...
Fanny Hernández, Edilberto Hernández, Oscar Javier Monroy Quesada, Fabio Norberto Pérez, Stella Del Pilar Vargas Clavijo   +4 more
openaire   +1 more source

Desiccation and Freezing Phenomena for Plants with Large Water Capacitance — Cacti and Espeletias

1992
Cacti and espeletias are native to dissimilar habitats, although the two groups must cope with several similar environmental constraints. Cacti, which are succulent plants that utilize crassulacean acid metabolism (CAM), grow in habitats characterized by long periods of drought (Ting 1985; Nobel 1988a).
P. S. Nobel, G. Goldstein
openaire   +1 more source

Über Inhaltsstoffe aus Espeletia schultzii Wedd., 1. Mitt

Archiv der Pharmazie, 1969
AbstractBlüten und Blätter der im Titel genannten Pflanze enthalten Wachs‐ und Harzstoffe. Daraus wurde eine Diterpencarbonsäure, Grandiflorensäure, isoliert und die Konstitution aufgeklärt.
openaire   +1 more source