Enforced periods of no email or internet to allow us to sustain concentration have been shown to be tremendously helpful.
Surprisingly, they found that the best way to sustain concentration wasn't to cut out DMN activity altogether, but to allow it to carry on as a low-level background hum.
Two participants even needed a break because they had physical pain (e.g. due to holding the telephone) or could not sustain concentration.
Power of Attention reflects the ability to focus attention and to rapidly process information, and the positive effects with NS2359 indicate that subjects were better able to direct their attention to ongoing tasks and to sustain concentration.
Selenoproteins may reach repletion at a plasma selenium concentration of ~ 125 µg/L, at which point the concentration of selenoprotein P reaches a plateau; whether sustained concentrations higher than this are beneficial, or indeed detrimental, is unknown.
Therapeutic efficacy, however, has been limited by diffusion or inactivation of these growth factors from the desired site and by the inability to deliver sustained concentrations of growth factors.
The use of gene transfer methods circumvents problems related to large-scale production and purification and offers additional benefits by achieving sustained concentrations of therapeutic protein with a syngenic glycosylation pattern that make the protein potentially less immunogenic.
Encapsulated cells showed sustained viability during long-term in vitro culture with those encapsulated in multilayer capsules secreting significantly higher and sustained concentrations of 17 β-estradiol (E2) than the two other encapsulation schemes (p < 0.05, n = 6) in response to follicle-stimulating hormone (FSH) and luteinizing hormone (LH).
The toxic gas becomes fatal with sustained concentrations above 150 parts per million, however symptoms of carbon monoxide poisoning, including headache, nausea and dizziness, may present themselves at 70 ppm.
As a 2012 study on MDMA and "interindividual differences due to polymorphisms and drug drug interactions" explained, prior research "suggested that CYP2D6 [poor metabolizers] are more susceptible to the acute effects of MDMA (Tucker et al., 1994), since a deficiency in this enzyme could substantially impair elimination of MDMA, leading to higher and sustained concentrations of MDMA in the body.
