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Facing death: How does the subterranean termite Coptotermes gestroi (Isoptera: Rhinotermitidae) deal with corpses?
(Zoology, 2019-12-01) [Artigo]
Social insects display a range of sophisticated behaviors to deal with cadavers, which together act to guarantee the health and social homeostasis of their colonies. In termites, cadaver management involves an entire ...
Ergatoid reproductives in the Neotropical termite Nasutitermes aquilinus (Holmgren) (Blattaria: Isoptera: Termitidae): developmental origin, fecundity, and genetics
(Insect Science, 2019-01-01) [Artigo]
Termite colonies are usually headed by primary reproductives, which establish nests during the swarming season. However, secondary reproductives may develop in some species and become supplementary or replacement breeders, ...
Histochemical characterization and secretory activity of the hypopharyngeal glands in the primitive social wasp Polistes versicolor (Hymenoptera: Vespidae)
(Sociobiology, 2005-12-12) [Artigo]
Using histochemical techniques, the present work describes the basic histochemical characteristics of the secretion in hypopharyngeal glands of Polistes versicolor (Olivier) and estimates the secretory activity in specimens ...
Histochemical and ultrastructural analysis of hepatic glycogen and collagen fibers in alloxan-induced diabetic rats submitted to long-term physical training
(Tissue and Cell, 2011-08-01) [Artigo]
Alterations in liver functions are common among diabetic patients, and many symptoms in the liver have been reported, including changes in glycogen stores and in the amount of collagen fibers. The practice of physical ...
Manipulation of Rest Period Length Induces Different Causes of Fatigue in Vertical Jumping
(International Journal of Sports Medicine, 2009-05-01) [Artigo]
The aim of this study was to directly compare the causes of fatigue after a short- and a long-rest interval between consecutive stretch-shortening cycle exercises. Eleven healthy males jumped with different resting period ...
The reproductive hiology and cycle of Rioraja agassizi (Muller and Henle, 1841) (Chondrichthyes : Rajidae) in southeastern Brazil, SW Atlantic Ocean
(Scientia Marina, 2007-09-01) [Artigo]
Specimens of Rioraja agassizi were collected Lit Guaruja pier, São Paulo State, Brazil, from March 2005 to March 2006. A total of: 275 males were captured. Based on the analysis of the clasper length, gonad weight, clasper ...
Floral anatomy of Neotropical species of Mayacaceae
(Flora, 2009-01-01) [Artigo]
The Mayacaceae are a monogeneric monocot family of herbs that grow on swampy areas in the Americas and in Africa. Both the number of species constituting the family and its inter-familial relationships are unclear. By ...
Ultrastructural analysis of the effect of mating delay on cell death in the ovaries of virgin honey bee (Apis mellifera L.) queens
(Journal of Apicultural Research, 2009-01-01) [Artigo]
This paper reports the effect of mating delay on the ovaries of virgin Apis mellifera queens using analysis by light and electron microscopy. The results showed that the terminal filament did not change throughout the study ...
Influence of physical preconditioning on the responsiveness of rat pulmonary artery after pulmonary ischemia/reperfusion
(Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology, 2007-07-01) [Artigo]
The aim of this work was to evaluate the effect of physical preconditioning in the responsiveness of rat pulmonary rings submitted to lung ischemia/reperfusion (IR). Wistar rats were divided into three groups: Sedentary ...
Reproductive morphology of the early-divergent grass Streptochaeta and its bearing on the homologies of the grass spikelet
(Plant Systematics and Evolution, 2008-10-01) [Artigo]
Reproductive morphology and development are described in the Brazilian grass Streptochaeta spicata, in order to assess the homologies of the characteristic grass inflorescence, termed a spikelet, and other reproductive ...