OBJECTIVE Traumatic brain injury (TBI) is a major brain injury type commonly caused by traffic accidents, falls, violence, or sports injuries. To obtain mechanistic insights about TBI, experimental animal models such as weight-drop-induced TBI in rats have been developed to mimic closed-head injury in humans. However, the relationship between the mechanical impact level and neurological severit...

traumatic brain injury (tbi) is an important clinical problem in the worldwide and especially due to breaking driving rules in iran, but undesirable consequences of trauma can persist for the rest of patient’s life. we investigated the effect of a novel weight drop model of tbi on incidence of seizure 2 weeks after tbi. in this regard, 21 male wistar rat weighted 250-300 gr randomly were divide...

Victims of minimal traumatic brain injury (mTBI) do not show clear morphological brain defects, but frequently suffer lasting cognitive deficits, emotional difficulties and behavioral disturbances. In the present study we adopted a non-invasive closed-head weight-drop mouse model to produce mTBI. We examined the effects of 20, 25, or 30 g weight drop 7, 30, 60 and 90 days following injury on mi...

Groups of six to nine Merino Summary lambs were weaned in September (May drop) and December (September drop) on to three types of irrigated perennial pastureperennial ryegrass (Lolium perenne), Ladino white clover (Trifolium repens) and lucerne (Medicago sativa), and one irrigated annual pasture-subterranean clover ( Trifolium subterraneum) . The weight gain of the weaners on white clover was s...

the effect of ca, zn and b spray application on preharvest fruit drop, sugars, calcium, zinc, and boron concentrations and as well on some physicochemical fruit properties of five commercial asian pear cultivars (‘ks’7, ‘ks’8, ‘ks’11, ‘ks’12 and ‘ks’14) was investigated under tehran province,s environmental conditions. trees were sprayed one month past fruit set until harvest within two week in...

We deal with a solid manifold block and a laminated manifold block that are used for connecting hydraulic components. They are useful for reducing the space and weight of hydraulic systems. We investigate pressure drops of their pipe flow with computational fluid dynamics (CFD) and compare those of two types. The majority of all pressure drops in both types is pressure drop at corners. In solid...