background: scuba diving is one of the fastest growing sports in the world. the objective of this study was to evaluate the effect of pressure variations to which divers are exposed on the pull out strength of glass fiber post luted with different cements. materials and methods: in this in vitro study, 120 extracted, single-rooted lower premolars were endodontically treated. they were randomly ...

Objectives This study aimed to evaluate the retention of composite restorations of primary anterior teeth reinforced with composite posts, glass fber posts, para-pulpal pins with composite posts, and para-pulpal pins alone. Methods Forty freshly extracted sound primary canine teeth with at least two-third of the root length remaining were selected. After disinfection, the tooth crown was cut...

“Background” Aneurysms and pseudo-aneurysms of the superior mesenteric artery are rare and potentially lethal. Such aneurysms may be found incidentally or they may be diagnosed after complications have occurred. “Aims” To report a case of Superior Mesenteric Artery Aneurysm, diagnosed incidentally, and successfully treated by Selective Angiography and Embolization To review the literature on Su...

Porous media column experiments were used to investigate Pseudomonas fluorescens strain P17 transport as a function of water content and the influences of the solid–liquid and gas–liquid interfaces. Retention of radiolabeled P17 in washed quartz sand was evaluated at 100, 84, and 46% water saturation. At the completion of each experiment, the porous medium was extruded and sampled directly for ...

Female resistance behavior that occurs prior to intromission does not by itself imply forced copulation. Such behavior may function instead as a test of the male in order to favor some males over others, or to induce the male to desist. Thus, male persistence and forcefullness may sometimes be better described as persuasion rather than coercion. Under the persuasion hypothesis, the male only ga...

The flagellum of a mammalian spermatozoon consists of an axoneme surrounded in distinct regions by accessory structures known as the fibrous sheath, outer dense fibers, and the mitochondrial sheath. Although the characterization of individual proteins has provided clues about the roles of these accessory structures, a more complete understanding of flagellar function requires the identification...

The r81e of thioctic acid in t’he oxidative decarboxylation of or-keto acids is now well established (1, 2). This was accomplished largely by studies with microbial cells grown essentially free of the cofactor. In some instances (2) it has been possible t,o separate the coenzyme from microbial enzymes involved in t,hioctic acid metabolism by extensive purification procedures. Although tjhe dire...

Purpose: Various aspects of the retention of mandibular complete dentures are unclear, as no evaluation method has been established to date. This study aimed to clarify the effect of suitable mouth opening, the shape of the residual ridge, and the form of the denture on retention when measuring retention of mandibular complete dentures. Methods: The subjects were 37 individuals wearing mandibul...

Sexually satiated males cease copulating after several ejaculations with the same female; and the presence of an unknown receptive female renews copulation including ejaculation, a process named the Coolidge effect. It is believed that the Coolidge effect has the aim to impregnate another female, although it is known that the sperm count gradually decreases after consecutive ejaculations. The m...

Large maxillofacial defects from malignant tumor treatment are rarely rehabilitated by surgical reconstruction alone. Ameloblastic carcinoma, a rare aggressive odontogenic malignant tumor, requires wide surgical excision to gain a tumor-free margin. In the post-surgical defect, prosthetic rehabilitation is the treatment of choice to restore function and esthetics. Moreover, an intra-oral prosth...