BACKGROUND AND OBJECTIVE The seasonal effect on the relapse of rheumatoid arthritis and spondyloarthropathies is still unclear. To assess the seasonal distribution of relapse onset in rheumatoid arthritis (RA) and spondyloarthropathy (SpA) and its association with solar factors. METHODS The monthly distribution of relapse onsets during the years 1998-2000 was retrospectively chart reviewed in...

Lack of drinking water is a global problem and especially in overdeveloped countries. this why many research laboratories are focused on solving problem. one the simplest, economical, environmental methods use conventional solar stills. Sand from city Illizi southern Algeria was used our to see how it affected distillation. So, with dimension (0.50 x 0.50 m), two identical stills were evaluated...

Water is necessary for human survival, individuals consume 20 to 50 liters of safe drinking water each day drinking, cooking, and other household activities. Contaminated not only unsanitary, but also dangerous one's health. The main aim this study improve the productivity solar desalination by selecting best still design. design single selected a simulation was made in COMSOL 5.5 program use t...