نتایج جستجو برای: mesozoic refractory sand
تعداد نتایج: 88414 فیلتر نتایج به سال:
in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...
Given the physiological limits to egg size, large-bodied non-avian dinosaurs experienced some of the most extreme shifts in size during postnatal ontogeny found in terrestrial vertebrate systems. In contrast, mammals--the other dominant vertebrate group since the Mesozoic--have less complex ontogenies. Here, we develop a model that quantifies the impact of size-specific interspecies competition...
This experiment compared the effects of sand and straw bedding in free stalls on resting time, cleanliness, hock injuries, and hoof health of dairy cows and tested whether cow preferences for a bedding material depended on the familiarity with the material. A total of 52 dairy cows were kept either on straw bedded concrete stalls or sand stalls for at least 21 wk. The lying behavior was observe...
how to cite this article: mollamohammadi m, tonekaboni sh, pirzadeh z, vahedian m . pregabalin in childhood epilepsy: a clinical trialiran j child neurol. 2014 autumn;8(4): 62-65. abstract objective the prevalence of active epilepsy is about 0.5–1%, and approximately 70% of patients are cured with first anti-epileptic drugs and the remaining patients need multiple drugs. pregabalin as an add-on...
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