Background and aim: The purpose of this study was to evaluate the effect of autoclave sterilization on the fracture rate of ProTaper instruments (ex vivo). Materials and methods: One hundred shaping and finishing ProTaper instruments were used in a crown – down technique for cleaning and shaping the mesial canals of extracted mandibular molars using 5.25% NaOCl for irrigation. In the e...

alkaline hydrolysis of ethyl acetate is essentially an irreversible and second order reaction. industrial importance of the reaction product, sodium acetate, necessitate for process improvement in terms of maximum conversion and economical usage of raw materials. statistical design of experiments was utilized to enhance conversion in both batch and plug flow reactors.a full two level factorial ...

Objective(s): Considering the lack of information, the effects of mild endurance exercise plus blood flow restriction (BFR) on electrocardiographic parameters, hypertrophy index, and expression of angiotensin II receptors type 1 (AT1R) and type 2 (AT2R) and apelin receptor (APJ) were assessed in hearts of old male rats.Materials and Methods: Animal were grouped as control (CTL), Sham (Sh), lowe...

Background: Anabolic-androgenic steroids are used at high doses by athletes for improving athletic ability, physical appearance and muscle mass. Unfortunately, the abuse of these agents has significantly increased. It has been established that exercise and high doses of anabolic-androgenic steroids may influence the hypothalamic- pituitary-testis axis, which can in turn affect testicular apopto...

objective: although smoking increase the risk of cardiovascular diseases, its quitting leads to weight gain due to increased appetite. the aim of this study was to determine the effect of face to face dietary counseling on metabolic syndrome (mets) indices in cigarette quitter. materials and methods: this 9-week parallel randomized clinical trial was conducted by participation of 50 patients wi...

Background and Objective: Lead entry into the body causes considerable damages to the brain in the long term. We aimed to investigate the effects of exercise (treadmill running) and flaxseed oil on lead acetate-induced behavioral deficits in male rats.  Materials and Methods: 60 rats were divided into 6 groups: Control (C), Exercise (Ex), Flaxseed oil (FO), Lead (L), Lead- Exercise (L-Ex), and...

This paper reviews an important period in the use of cryptographic methods in Mexican History, the Mexican Revolution from 1910–1916. As is the case in any civil war, there were many groups in conflict. Among several leaders in theMexican Revolution, it is worth mentioning Porfirio Dı́az, Francisco I. Madero and Venustiano Carranza. They represent three main groups which used characteristic cryp...

The historic relation between Frege and ‘Frege’s principle’ is investigated. What did Frege intend with the principle, did he change his opinion concerning it, did he invent the principle? Johan van Benthem did twenty years ago reseach on another aspect of Frege’s work and some of his opinions are confirmed by the present research. His pregnant formulations and suggestive metaphors are quoted w...