purpose: the aim of this study was to evaluate the effect of two gingival finishing lines (90° shoulder and deep chamfer) on the marginal fitness of two types of full anatomic all-ceramic crowns; zirconia crowns (zikonzhan) and glass ceramic crowns (ips e-max cad) milled with cad/cam system. materials and methods: two dentoform teeth of left maxillary first molar were prepared with chamfer fini...

purpose the aim of this study was to investigat the offensive efficiency of the professional handball players forming the front and rear lines. methods our investigation was carried out on four matches (final, semi-finals and classifying match) at the 19th male handball world championship “tunisia 2005”. finalist teams were tunisia, france, croatia, and spain. matches were recorded using 5 digi...

we assessed the size and composition of the soil seed bank and above-ground vegetation in 52 relevés representing a range of habitats within an old- growth, temperate deciduous forest at hyrcanian region, northern iran. we identified 63 taxa in the seed bank, with an average density of 4202 seeds/spores per m2 by seedling emergence method. hypericum androsaemum, cardamine impatiens, and rub...

objective(s): artemisia is a genus of herbs and small shrubs forms an important part of natural vegetation in iran. it has been reported that several artemisia species possess anti-proliferative effects. considering the value of this genus in anti-cancer researches we have chosen artemisia biennis for cytotoxic and mechanistic studies. materials and methods:in this study we have investigated th...

800x600 in order to determine the effect of intracorneal rings (intacs sk), when implanted in keratoconic patients, on corneal curvature, uncorrected visual acuity (ucva), best corrected visual acuity (bcva) and on the progression of the cone through three years follow-up period. in this prospective nonrandomized study 114 eyes of 71 keratoconic patients (38 females and 33 males) were implanted...

eight promising lines of bread wheat which had been selected through the preliminary and advanced traits, together with two check cultivar shiroudi and tajan were evaluated for yield, adabtability and response to cereal diseases in an on farm experiment conducted in two sites in moghan. combined analysis of variance on yield and yield components showed significant differences of lines in yield ...

A line ` is a transversal to a family F of convex polytopes in R if it intersects every member of F . If, in addition, ` is an isolated point of the space of line transversals to F , we say that F is a pinning of `. We show that any minimal pinning of a line by polytopes in R such that no face of a polytope is coplanar with the line has size at most eight. If in addition the polytopes are pairw...