cutting blades are exposed to abrasion and breakage during operation. therefore a comparison of such mechanical properties as hardness among different blades is necessitated. in this research, the hardness of three iran made blades (khooshe-talaei, iran-derogar and combine-sazi) and two foreign (germany and u.s.a) manufactured ones were evaluated and compared with the standard figures. the resu...

objective: tooth surface undergoes continuous remineralization and demineralization. the aim of this study was to compare the effect of caseinphosphopeptide-amorphous calcium phosphate (cpp-acp) paste and fluoride gel on the microhardness of demineralized enamel lesions.   methods: frothy eight specimens of premolar teeth were chosen and randomly divided to 4 groups of 12. after the initial mea...

Background. Diabetic retinopathy, one of the major complications diabetes, is leading causes low vision and blindness. One main decreased central in patients with diabetic retinopathy type 2 diabetes mellitus maculopathy (DMP). DMP possible development edema can be detected even initial changes fundus. The purpose was to investigate safety profile effectiveness various modern vitreoretinal inte...

Tree spanner problems have important applications in network design, e.g. in the telecommunications industry. Mathematically, there have been considered quite a number of maxstretch tree spanner problems and of average stretch tree spanner problems. We propose a unified notation for 20 tree spanner problems, which we investigate for graphs with general positive weights, with metric weights, and...

in order to study the effect of soil nitrogen content and water hardness on glyphosate efficacy on common lambsquarter (chenopodium album l.) and redroot pigweed (amaranthus retroflexus l.) control, an experiment was carried out as a completely randomized design in a factorial arrangement with three replications. experimental treatments were included soil nitrogen content (18, 50, 90, 200 and 3...

all aquatic organisms are directly or indirectly affected by the physical characteristics of their environment, especially the chemical composition of the water. the high concentration levels, damage tissues and interfere with the normal growth and proliferation. the aim of this research was to investigation acute toxicity of znso4 and cucl2 to gambusia holbrooki by static bioassays at differen...

background: the interim restorative materials should have certain mechanical properties to withstand in oral cavity. the aim of this study was to evaluate the hardness and wear resistance ofinterim restorative materials. materials and methods: fifteen identical rectangular shape specimens with dimensions of 2 mm × 10 mm × 30 mm were made from 7 interim materials (tempspan, protemp 3 garant, rev...

Page 1 of 17 © Lou Agosta, Ph.D. [email protected] By “sympathy” Hume does not mean the particular sentiments of pity or compassion or benevolence but rather the function of communicating affect in general. Sympathy reverses the operation of the understanding, which converts impressions of sensation into ideas. In the case of sympathy, the operation is in the other direction. Sympathy arouse...