Sentences with phrase «remain at low concentrations»

Humans have long had a knack for concentrating heavy metals that would otherwise remain at low concentrations within the environment.

Not exact matches

They showed that participant's sperm counts and sperm concentration were significantly lower at the end of the 3 - months sauna regimen, and they remained low for 3 months after these gentlemen had finished their twice a week sauna experiment.

Scholars at the University of North Carolina Chapel Hill conducted a comprehensive evaluation of the teaching fellows program and found positive results, including a) graduates teach in schools and classrooms with greater concentrations of higher performing and lower poverty students; b) graduates produce larger increases in student test scores in all high school exams and in 3rd - 8th grade mathematics exams; and c) teaching fellows remain in North Carolina public schools longer than other teachers.

Our results show that hydroclimatic variability in the Southwest has not remained constant over the last millennia, with a shift from low to high variance at the MCA - LIA transition that was accompanied by a change in quasi-periodic variance, from a higher concentration of power in the multi-decadal periodicities during the MCA vs. interannual and decadal periodicities during the LIA.

The Statement also highlighted that long - term indicators of climate change such as increasing carbon dioxide concentrations, sea level rise and ocean acidification continue «unabated», with Arctic sea ice coverage remaining below average and the previously stable Antarctic sea ice extent at or near a record low.