Regulatable Acetylcholine-Producing Fibroblasts Enhance Cognitive Performance

Homogeneous tetracycline-regulatable gene expression in mammalian fibroblasts.

The expression of transfected genes in mammalian cells is rapidly repressed by epigenetic mechanisms such that, within a matter of weeks, only a fraction of the cells in most clonal populations still exhibit detectable expression. This problem can become prohibitive when one wants to express two ectopically introduced genes, as is necessary to establish cell lines that harbor genes regulated by...

Chemosignals of fear enhance cognitive performance in humans.

It is well documented across phyla that animals experiencing stress and fear produce chemical warning signals that can lead to behavioral, endocrinological, and immunological changes in the recipient animals of the same species. Humans distinguish between fear and other emotional chemosignals based on olfactory cues. Here, we study the effect of human fear chemosignals on the speed and accuracy...

Diversifying experiences enhance cognitive flexibility

Improving Learner Performance in Producing Grammatical Structures

This experimental study examined the effectiveness of using focused and unfocused tasks on Iranian intermediate EFL learners’ performance in producing noun, adjective, and adverb clauses. In addition,the aim of this study was to explore the effects of form-focused instruction and the feedback students received from their teacher after doing focused grammar tasks. Data consisted of the scores of...

Gene Regulatable Lentiviral Vector System