background: most studies on anabolic-androgenic steroids abuse have been done in adult rats, but few data are available to immature. objective: this study was conducted to assay the effect of nandrolone decanoate (nd) on the testis and testosterone concentration in male immature rats compare with mature ones in short and long time. materials and methods: 40 mature rats were divided into 4 group...

the laelapid mite, gaeolaelapsaculeifer (canestrini) is widespread in soil habitats and feeds on different small arthropods, fungi and nematodes. the development and fecundity of g. aculeifer feeding on rhizoglyphus echinopus (fumouze & robin) as prey was studied at eight different constant temperatures which include: 16, 17.5, 20, 22.5, 25, 27.5, 30 and 32.5 ºc, with relative humidity of 6...

Abstract The endodontic revascularization may be an alternative treatment for necrotic immature teeth, however, several steps cause tooth discoloration. This study evaluated the use of three calcium silicate-based cements with different radiopacifying agents on color alteration (∆E) extracted premolars after simulation revascularization. Forty single rooted were shaped #1-6 gates Glidden drills...

BACKGROUND Ridge preservation was developed as a therapy to prevent severe bone resorption after tooth extraction. The purpose of this study is to determine if there is any difference in the amount of new bone formation ≈3 months after extraction and ridge preservation compared to that after ≈6 months. METHODS Minimally traumatic extraction with ridge preservation using mineralized human bone...

A case of intracranial mesenchymal chondrosarcoma (IMC) was treated surgically at our institution. CT images of IMC have not been previously published; and a review of the literature found only one reported case with CT correlation [1). The oldest patient with a primary IMC previously reported was 51 years old [2]. We present a case occurring in a 61-year-old woman and describe the CT and angio...

INTRODUCTION The aim of the work was to present a diagnostic value of selected indices and angles in orthodontic-surgical treatment of impacted maxillary canine. MATERIAL AND METHODS 134 records with panoramic views of patients treated in the Department of Orthodontics of the Pomeranian Medical University in Szczecin because of occurrence of impacted maxillary canine (IMC) constituted the stu...

OBJECTIVE This study aims at contributing to the definitive diagnosis of ossifying fibroma (OF) based on histomorphological features. The study also aims to determine some demographic features of OF, common sites of occurrence and to determine whether behavior correlates well with the histomorphological variations seen in the lesion. MATERIALS AND METHODS A total of 80 patients who were diagn...

Proton exchange membrane fuel cells present a large number of difficulties for controller design, such as severe nonlinear dynamics, sign change in gain of the plant and possible starvation of the reactants. In this paper, we have presented an approach for circumventing these types of problems. The proper selection of manipulated variables, using an RGA analysis, circumvents the problem of sign...