Seahorses (Syngnathidae: Hippocampus) are iconic marine teleosts that are readily identifiable by their upright posture. The fossil record is inadequate to shed light on the evolution of this trait because it lacks transitional forms. There are, however, extant syngnathid species (the pygmy pipehorses) that look like horizontally swimming seahorses and that might represent a surviving evolution...

Sexual selection theory predicts a positive correlation between relative parental investment and mate choice. In syngnathid fishes (seahorses and pipefish), males brood offspring in specialized brooding structures. While female-female mating competition has been demonstrated in some pipefishes, all seahorses (genus Hippocampus) studied to date have been found to have conventional sex roles with...

receive isoniazid if their TB developed when they were young. In the present study, the resistant rate was lower for M. tuberculosis strains isolated from elderly persons than from younger adults. These fi ndings suggest that fi rst-line anti-TB medications still have good in vitro activity against M. tuberculosis strains in elderly patients. In contrast to the study by Vinnard et al. (1), our ...

background: sex steroids and their receptors exist in hippocampus and affect spatial learning and memory. this study was designed to measure testosterone level of ca1 and to assess the effect of spatial learning on its amount in left and right hippocampus of adult male rats. methods: sixteen rats were divided into two intact and castrated groups, and then trained in morris water maze (mwm). ano...

a person, who is talented, performs in a certain capacity above the norm. talent is different from intelligence which is a response to a circumstance using knowledge and skill. the attributes of talent are exceptional memory, rapid processing speed, and high motivation, an affinity for learning, creativity and optimal cognition. there is some proof suggests that certain aspects of talent are re...

introduction: gap junctions are intercellular membrane channels that provide direct cytoplasmic continuity between adjacent cells. this communication can be affected by changes in expression of gap junctional subunits called connexins (cx). changes in the expression and function of connexins are associated with number of brain neurodegenerative diseases. neuroinflammation is a hallmark of vario...

0

rove beetle dermatitis produced by the family staphylinidae genus paederus has world- wide distribution some one hundred species of paederus have been found, but it is believed that only 30 of these produce dermatitis. up to 1976 three species of paederus have been found in iran as: p. fusciped curtis; p. pietschmanni bershaner , and p. spectabilis kraatz . observations on the biology of paeder...