Background and purpose: Administration of high dose of remifentanil and propofol provides adequate coditions for tracheal intubation without musclerelaxants. Intubating conditions with meperidine, propofol and low doses of remifentanilcompared in this study. Materials and methods: After premedication withmidazolam 0.03 mg/kg and meperidine1mg/kg, 60 patients under orthopedic surgeryrandomized ...

Phosphorus is an essential nutrient for plant growth and productivity. Since agricultural soils in Iran are predominantly calcareous with very low available Pi content, Pi deficiency has been considered to be a major nutritional constraint for crop production, thus, the application of Pi-fertilizers is essential for satisfactory crop production. The application of Pi-fertilizers contaminates so...

Introduction: In some jobs, physical activity can be done in high noise pollution that can affect the heart rate. The aim of this study was to investigate the effects of noise exposure and physical activity on heart rate in the hot and humid conditions. Materials and Methods:  This experimental study was performed on 14 healthy men in hot and humid climatic chamber (35 °C, 75% RH). ...