This study examined whether the effectiveness of virtual reality (VR) in science education could be enhanced by providing students with relevant information about VR’s usefulness before a lesson. On basis expectancy–value theory, we manipulated students’ perceived VR using video priming presenting biology We then assessed how intervention affected presence, interest lesson, and learning a...

condition factor of fish species is very important parameter for understanding fish biology and pathology. for that purpose, we sampled 120 fish individuals from the sava river at four locations (posavina region), where most of them belongs to the cyprinidae family while the others belonging to the families: percidae, siluridae, ameiuridae, esocidae and gobiidae. in total fish sample we found t...

The precise quantitation of activated factors in human factor IX concentrates has been accomplished with the use of recently developed, specific assays for factors IXa, Xa, and thrombin. The assay for factor IXa, which measures the initial rate of 3H-factor-X activation, was shown to be specific for factor IXa in the concentrates. Activated factor IX concentrates contained 1.0-2.3 microgram/ml ...