Interpopulational gene flow within a species can reduce population differentiation due to genetic drift, whereas genetic exchange among taxa can impede speciation. We used allozyme data to estimate gene flow within and among geographic races and species of perennial herbs in the Ipomopsis aggregata complex (Polemoniaceae). Estimates of interpopulational gene flow within taxa from two methods (F...

Assistant Professor of Thoracic Surgery. Fluminense Federal University (UFF). Department of Surgery, Division of Thoracic Surgery. Niterói-RJ. Brazil. Full Professor of Thoracic Surgery. Fluminense Federal University (UFF). Department of Surgery, Division of Thoracic Surgery. Niterói-RJ. Brazil. Full Professor of Internal Medicine. Fluminense Federal University (UFF). Department of Internal Med...

BACKGROUND Salvia divinorum is a non-water-soluble hallucinogen that is becoming increasingly popular among adolescents. Salvia is a highly selective full agonist of primate and cloned human cerebral kappa-opioid receptors, although its psychotomimetic effects are similar to serotonergic agonists and NMDA glutamate antagonists. Salvia has been associated with depersonalization, laughter, feelin...

Salvia L. has a wide variety of traditional usages as digestive, appetizer, carminative, antiseptic, stimulant, pain reliever, antipyretic, diuretic, antitussive and for bronchitis, asthma cold. Anatomical features are extremely important the taxonomy species, especially leaf stem represent many specific characteristics. The aim this study is to determine distinctive anatomical structures S. au...

The left atrial appendage (LAA) is an extension of the atrium (LA) and has complex anatomical structure unique pathophysiological properties. LAA functions as a decompression chamber during ventricular (LV) systole under increased pressure conditions. Despite previously being considered relatively insignificant portion cardiac anatomy, been highlighted important involved in genesis thrombus for...

Background: Knowledge of variations in dental anatomy and canal morphology plays a key role in the success of endodontic therapy. Case presentation: This report presents a patient who had unusual tooth morphology, including the bilateral existence of 11 maxillary and mandibular first, second and third molars with a single root and a single canal. The patient was diagnosed using cone-beam comput...

Successful root canal therapy requires a thorough knowledge of root anatomy and root canal morphology which may be quiet variable. The significance of internal root canal morphology has been emphasized by studies demonstrating that variations in canal morphology may affect the endodontic outcome. Consequently, in treating each tooth the clinician must assume that complex anatomy occurs often en...

In this study, the morphology, palynology, fruit micromorphology and anatomy of Sanicula europaea L. were studied. The morphological description S. is expanded. Pollen morphology species was examined by SEM LM, micromorphological characters also SEM. Cross-sections mature fruits examined, a detailed anatomical presented.

ETHNOPHARMACOLOGICAL RELEVANCE In 1962 ethnopharmacologists, Hofmann and Wasson, undertook an expedition to Oaxaca, Mexico. These two researchers were the first scientists to collect a flowering specimen of Salvia divinorum allowing the identification of this species. While the species' traditional use is confined to a very small region of Mexico, since Hofmann and Wasson's expedition 50 years ...