Insomnia and restless leg syndrome in patients undergoing chronic hemodialysis in Rafsanjan ali ibn abitaleb hospital

Background: Sleep is one of the most fundamental human needs; without any doubt sleep is even more essential for sick patients, especially for patients with chronic illnesses. Sleep disturbance may lead to anxiety and reduced quality of life. Restless leg syndrome (RLS) is a sensory-motor disorder accompanied by a strong desire to move the legs or other parts of the body, which can cause sleep disturbance. Its etiology is unknown, but increased urea and creatinine levels before dialysis, iron deficiency due to kidney failure and end-stage renal disease (ESRD) are mentioned as causes. Objectives: This study is designed to examine the prevalence of insomnia and restless leg syndrome in patients undergoing chronic hemodialysis in Rafsanjan Ali Ibn Abitaleb Hospital. Patients and Methods: In this study we used two questionnaires to evaluate the presence of RLS and insomnia in ESRD patients who were undergoing hemodialysis treatment as kidney replacement therapy. Results: According to our results, 54.5 of patients were diagnosed with RLS, and of those 65.2 and 42.9 were women and men, respectively. RLS is seen more often among patients with blood group type A, but this result was not statistically significant. There was a statistically significant correlation between RLS and a positive family history of RLS, between RLS and the number of hemodialysis treatments per week and also between RLS and the Insomnia Severity Index. Unlike previous studies, in this study we did not find any statistically significant correlation between RLS and biochemical factors such as serum iron, TIBC, BUN, creatinine, potassium, calcium and phosphorous levels. Conclusions: The frequency of RLS among our patients was remarkable and we conclude that all patients who are undergoing hemodialysis should be screened for RLS, which can assist in providing proper attention and treatment. © 2016, Nephrology and Urology Research Center

Fabrication and precipitation hardening characterization of nanostructure A17075 alloy

30-34<span style="font-size: 9.0pt;mso-bidi-font-size:10.0pt" lang="EN-US">In this paper the fabrication and precipitation hardening behavior of bulk nanostructure A17075 alloy is investigated. In order to produce this alloy, the elemental powder based on the nominal composition of conventional A17075 alloy is milled up to 15 h and then hot pressed. The milled and hot pressed samples are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and differential thermal analysis (DTA). The results show that after 15 h of milling, the alloying elements are dissolved in Al matrix and a supersaturated solid solution with average crystallite size of about 30±5 nm is obtained. Hot pressing the powder samples at 500°C under 400 MPa led to the fully dense bulk nanostructure A17075 alloy. The consolidated sample has a hardness value of 165 HV which increases to 240 HV after appropriation hardening. </span

DSC study on phase transitions and their correlation with properties of overaged Al-Zn-Mg-Cu alloys

This article investigates the phase transitions of complex quaternary Al-Zn-Mg-Cu alloys with Zr addition at overaged conditions. Differential scanning calorimetry (DSC) is employed to quantitatively analyze the phase transformation phenomena of a wide range of 7xxx series alloys through endothermic and exothermic reactions. The DSC observations detailing heat effect peaks and thermal parameters of ?? dissolution contain valuable information on the presence of equilibrium phases and the optimum alloying element contents. Based on DSC experimental data and phase diagrams, the balance of critical properties such as strength and electrical conductivity of Al-Zn-Cu-Mg 7xxx series alloys has been studied by considering the formation, dissolution, and incipient melting of S and T phase, dissolution of ?? phase as well as the formation of ? phase. Nine Al-Zn-Mg-Cu alloys have been studied through microstructural examination and detailed DSC analysis. The correlation between the properties and the DSC data of the selected alloys has been analyze