Sentences with phrase «hours daily exposure»

Not exact matches

Consumers spend nearly four hours online daily according to a report from The Media Audit — that's 32.5 percent of their media time compared to daily exposure to newspapers, radio, TV and outdoor advertising.

To further test their hypothesis, the researchers delivered antibiotics for different periods, exposing three different bacteria populations to repeated daily antibiotic exposures lasting 3, 5, or 8 hours.

«One of the surprising findings from this study was that even the subjects who had extreme exposure — two subjects who went to a music festival with 16 hours of exposure at 101 to 103 dBA (A-weighted decibels), which is around 1,000 percent of the daily occupational noise limit — had only temporary changes on some functional tests, with no evidence of permanent pathology,» Le Prell said.

«Exposure» was defined as keeping one or more dogs indoors for at least one hour daily.

On the other hand, in the middle hours of the day in spring and summer, with 25 % of the body exposed, around 10 minutes of sun exposure at about 13:00 and 20 minutes from 15:00 to 17:00 would be sufficient to meet daily vitamin D requirements.

Such a standard would be based on a cumulative, weighted total of daily 12 - hour ozone exposures to plants and crops over a three - month period.

Farrell Harris says a fair skinned person might benefit from 10 - 15 minutes of daily sun exposure, but someone with a lot of skin pigmentation might need several hours to absorb adequate amounts of the vitamin.

According to Science Daily, «Prior to boiling water exposure, the rate of release from individual bottles ranged from 0.2 to 0.8 nanograms per hour.

But we needn't endanger ourselves to take advantage of the sun's benefits: Fair - skinned people need less than 30 minutes of casual exposure on bright days to meet their daily requirement, while darker - skinned individuals need about two hours, Hyman said.

«Using a daily SPF of 30 or more, ideally with a physical sunblock, such as titanium dioxide or zinc oxide; reapplying every two hours if you're out for extended periods of time; wearing hats; and avoiding direct sun exposure are all important,» says New York City dermatologist Jennifer Chwalek.

Science Daily reported that a new study from the Lighting Research Center (LRC) at Rensselaer Polytechnic University, published in the journal Applied Ergonomics, shows that a two - hour exposure to luminous back - lit displays — like e-readers — suppresses melatonin, which could then affect sleep by disturbing the body's natural circadian rhythm.

Adjusted Effect Estimates and Odds Ratios for Daily Mean Media Exposure and Viewing > 2 Hours per Day at 2 Years by ITSC Self - Regulation Category

We calculated total daily duration by adding each exposure during the 24 - hour period.

The study hypothesized that: 1) children's exposure to violence would be associated positively with self - reported violent behaviors; 2) parental monitoring would be associated negatively with children's violent behaviors; and 3) the number of daily television - viewing hours and a preference for watching violent television shows would be associated positively with children's violent behaviors.