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Persistence and stability of cichlid assemblages in neotropical floodplain lagoons
(Springer, 2012-02-01)
In this study, we evaluated how cichlid assemblages are affected by seasonal and interannual variations in water volume in the floodplain lagoons of the Cuiaba River in the Pantanal wetland. Eleven lagoons were sampled in ...
Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito
(Elsevier, 2009-12)
Airglow intensities and rotational temperatures of the OH(6-2) and O2b(0-1) bands acquired at El Leoncito (32°S, 69°W) provide good annual coverage in 1998–2002, 2006, and 2007, with between 192 and 311 nights of observation ...
Spatial and seasonal variation in leaf temperature within the canopy of a tropical forest
Understanding leaf temperature (Tleaf) variation in the canopy of tropical forests is critical for accurately calculating net primary productivity because plant respiration and net photosynthesis are highly sensitive to ...
Diversity and seasonal fluctuation of predominant microbial communities in Bhitarkanika, a tropical mangrove ecosystem in India
(Universidad de Costa Rica, 2012)
Seasonal Variation of Peripheral Blood Leukocyte Telomere Length in Costa Rica: A Population-Based Observational Study
(2014)
ABSTRACT: Objectives: Peripheral blood leukocyte telomere length (LTL) is increasingly being used as a biomarker of aging, but its natural variation in human populations is not well understood. Several other biomarkers ...
Seasonal Variation of Peripheral Blood Leukocyte Telomere Length in Costa Rica: A Population-Based Observational Study
(2014)
ABSTRACT: Objectives: Peripheral blood leukocyte telomere length (LTL) is increasingly being used as a biomarker of aging, but its natural variation in human populations is not well understood. Several other biomarkers ...
Dependence of equatorial F region vertical drifts on season and solar cycle
(American Geophysical Union, 1979-10-01)
Vertical drift measurements have been made at Jicamarca for more than half a solar cycle. The data from periods of high and low activity are appreciably different. Daytime drift velocities during sunspot minimum are usually ...
Seasonal and pollution-induced variations in biomarkers of transplanted mussels within the beagle channel
(Pergamon-Elsevier Science Ltd, 2011-06)
The occurrence of biomarker variations linked to environmental factors makes it difficult to distinguish the effect of pollution. In an attempt to evaluate spatial and seasonal effects of environmental parameters on biomarker ...
Seasonal variation in coumarin content of Mikania glomerata
(2000-12-12)
Mikania glomerata Spengal extract contains approximately 0.5 percent of coumarin, a substance that displays anti-inflammatory and expectoratory activities. Extracts from different young leaves of plants collected during ...