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Mostrando ítems 11-20 de 2082
Manipulação experimental da colonização de detritos foliares por invertebrados aquáticos em um riacho tropical de 3ª ordem
(2015-01-01)
Through a manipulative experiment, the colonization of leaf litter by invertebrates was investigated in two sections of a tropical stream (spatial scale) that differed in function of the canopy cover, one with the presence ...
Seasonal variation in insulin sensitivity in healthy elderly people
(2003)
OBJECTIVE: There is a seasonal variation in the incidence of diabetes mellitus and cardiovascular diseases. However, there is very little information about the seasonal variation in insulin sensitivity. We report the ...
Solar Cycle and Seasonal Distribution of Geomagnetic Storms with Sudden Commencement
(Canadian Center of Science and Education, 2014-02)
In this brief paper the seasonal and solar cycle distribution of storms with sudden commencement is presented. A correlation between the number of geomagnetic storms by month and monthly sunspot numbers is observed. Also, ...
Seasonal variations in plasma cortisol, testosterone, progesterone and leukocyte profiles in a wild population of tuco-tucos
(Zoological Society of London, 2013-02)
Studies addressing seasonal changes in hormone levels are important in order to understand the interplays between ecology and physiology. In this study, we evaluated seasonal variations in cortisol, testosterone, and ...
Seasonal vatiations of the chemical composition of Brazilian propolis
(1998-07-01)
The seasonal variations in the chemical composition of Brazilian propolis, collected by two bee subspecies, Africanized Apis mellifera and European Apis mellifera ligustica, have been investigated by GC and GC-MS. The main ...
Seasonal influence of the surgical outcome after thoracic sympathectomy for hyperhidrosis
(Springer, 2011-06-01)
Analyze the seasonal variation of the surgical results after sympathectomy through the seasons of the year. The surgical results are better in the spring, and the sudomotor reflex is worst in summer. Comparison of surgical ...
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 variation in the population structure of the freshwater prawn Macrobrachium brasiliense (Decapoda: Palaemonidae) in a neotropical region
(Soc Brasileira Carcinologia, 2021-12-03)
The present study aims to describe the population structure of the freshwater prawn Macrobrachium brasiliense and to analyze whether it varies seasonally, with emphasis on abundance variation by demographic category, sex ...
Sex-specific seasonal body mass variation in the Pale-breasted Thrush (Turdus leucomelas)
(2021-06-01)
Body mass variation is an effective way to evaluate the effect of seasonality on the physiological status of individuals. The breeding period is critical for altricial birds in terms of energy balance and leads to sex-specific ...
Seasonal influence of the surgical outcome after thoracic sympathectomy for hyperhidrosis
(Springer HeidelbergHeidelbergAlemanha, 2011)