atmospheric visibility has been defined as the greatest distance at which an observer can see a black object viewed against the horizon sky, which in quantitative terminology is known as visual range. visibility, in the absence of special meteorological events (e.g. rain and fog), is an excellent indicator of air quality. visibility impairment results from light scattering and absorption by atm...

introduction: the process of urbanism in countries that are developing, like islamic republic of iran with increasing of the number and the size of cities and the fast accepting of population have been caused the forming of problems like an in-official economics and in-official settlement and was become creating high population in main and old places of city and increasing of air pollution and ...

47 48 When the head does not move, rapid movements of the eyes called saccades are used 49 to redirect the line of sight. Saccades are defined by a series of metrical and kinematic 50 (evolution of a movement as a function of time) relationships. For example, the 51 amplitude of a saccade made from one visual target to another is roughly 90% of the 52 distance between the initial fixation point...

In ruminants, colostrum is a vital source of immunoglobulins that provide passive immunity for their offspring during the neonatal period. It is suggested that colostral immunoglobulin G (IgG) concentration varies between and within breeds and could also be affected by maternal factors. The aim of this study was to investigate possible effects of litter type and ewe parturition number on colost...

introduction the study area is located 12km away from the north east of sarbisheh at the eastern border of the lut block (karimpour et al., 2011; richards et al., 2012). the magmatic activity in the lut blockhas begun in the middle jurassic (165-162 ma) and reached its peak in the tertiary age (jung et al., 1983; karimpour et al., 2011). volcanic and subvolcanic rocks in the tertiary age cover ...

introduction: weeds causing 15 % or more damage to crops, annually. the amount of these damages depends upon different factors such as cultivar type and weeds species. wild mustard is a cosmopolitan and most serious broad leaf weed in wheat fields which has widespread through world including iran. rapid emergence of wild mustard under cold condition and fast growth early in the spring are reaso...

how to cite this article: abdi m, khatami sh, hakhamaneshi ms, alaei mr, azadi na, zamanfar d, taghikhani m.validation of urinary glycosaminiglycans in iranian patients with mucopolysaccharidose type i: the effect of urine sedimentation characteristics. iran j child neurol. 2014; 8(4):39-45.   abstract objective the first line-screening test for mucopolysaccharidosis is based on measurement of ...