Above 12,500 pg total RNA per 25 ?l reaction, we begin to observe problematic qPCR inhibitory phenomena (with Trizol®-isolated tissue total RNA) of Type 1, Type 2, Type 3 (and presumably Type 4) varieties.
Distraction was observed as problematic for both age groups with delayed responses to a lead vehicle-braking event as indicated by delayed accelerator releases.
The activity was structured into two parts, each addressing different implicit objectives derived from what the instructor had observed as problematic in students' understanding of evolution by natural selection (Table 1): Part I. Objective: to observe the random occurrence of mutations.
And Rudolph and Stewart (1998 p. 1076) observed that: "problematic has been the tendency for science educators to use the physics model [that is focussed on laws] in the development of curriculum intended to address general issues concerning the nature of science, thus perpetuating a misunderstanding of scientific method that may foreclose the effective learning of evolutionary biology".
With HIV, unlike tuberculosis, disease duration is life-long, and medications must be given daily, making the routine use of directly observed HAART problematic.
Moreover, Mentzoni et al. observed that problematic use of video games was associated with lower scores for life satisfaction and high levels of anxiety and depression [ 19].
For example, if stress exposure occurs after or very late in a pollution exposure interval, interpreting observed interactions is problematic.
However, the fact that this interaction was not observed reflects a problematic inconsistency between theory and the empirical evidence.
What can be generally observed, is a problematic contradiction between the public "orchestration" of dying, as it occurred in the cases of Schiavo and Englaro, and the predominate model in modern societies of suffering and death as taboo.
We observed considerable levels of problematic text recycling, particularly in economics and psychology, while it became clear that the extent of text recycling varies substantially between research fields.
