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Circadian and seasonal variation in the essential oil from Virola surinamensis leaves
(Elsevier B.V., 1997-10-01)
The essential oil from leaves of Virola surinamensis shows circadian variation in elemicin and in monoterpenes during the rainy season (February). The monoterpenes represents 50% of total volatile compounds during the dry ...
Diurnal evolution of solar radiation at the surface in the city of São Paulo: Seasonal variation and modeling
(2002-04-05)
Seasonal variations in the diurnal evolution of the global, diffuse and direct solar radiation at the surface, the clearness index, diffuse fraction and direct fraction are described in detail for the City of Sao Paulo, ...
Seasonal variation in body size of tropical anuran amphibians.
(2010-01-01)
Most anurans are considered short lived reproducing only once, with adult size being an important factor contributing to mating success. We sampled anurans with 30 pitfall traps in three forest patches of the northwestern ...
Fruit color and contrast in seasonal habitats - a case study from a cerrado savanna
(2013-09-01)
Communication contributes to mediate the interactions between plants and the animals that disperse their genes. As yet, seasonal patterns in plant-animal communication are unknown, even though many habitats display pronounced ...
Africanized honey bee (Apis mellifera) venom profiling: Seasonal variation of melittin and phospholipase A(2) levels
(Pergamon-Elsevier B.V. Ltd, 2010-09-01)
Apis mellifera venom is comprised basically of melittin, phospholipase A(2), histamine, hyaluronidase, catecholamine and serotonin. Some of these components have been associated with allergic reactions, amongst several ...
Seasonal variations in chemical composition and stable isotopes of farmed and wild Brazilian freshwater fish
(Elsevier B.V., 2010-09-01)
This study examined variations in the Fulton condition factor, chemical composition, and stable isotopes of carbon and nitrogen in the Brazilian freshwater fish cachara (Pseudoplatystoma fasciatum), comparing farmed and ...
Spatial variations at different observational scales and the seasonal distributions of stream macroalgae in a Brazilian subtropical region
(Sociedade Botânica de São Paulo, 2012-01-01)
We examined the relationships between environmental variations in lotic ecosystems with the seasonal dynamics of macroalgae communities at different spatial scales: drainage basin of two rivers (Rio das Pedras and Rio ...
Seasonal variation in essential oils of Lychnophora pinaster Mart
(Taylor & Francis, 2019)
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 ...