Featured Research

from universities, journals, and other organizations

Children Inhale Higher Percentage Of Pollution, New Research Shows

Date:
August 26, 1998
Source:
University Of North Carolina At Chapel Hill
Summary:
Children inhale more airborne particles for their size than either adolescents or adults, according to a new University of North Carolina at Chapel Hill study sponsored by the Environmental Protection Agency.

CHAPEL HILL, N.C.--Children inhale more airborne particles for their size than either adolescents or adults, according to a new University of North Carolina at Chapel Hill study sponsored by the Environmental Protection Agency.

The study may help explain recent research suggesting that children are more susceptible than adults to illnesses caused by breathing polluted air, researchers say. Chronic coughing, bronchitis and asthma are among health problems worsened by dirty air.

"We believe this work is important because it supports observations by others about children being affected by particulate air pollution," said Dr. William D. Bennett, research associate professor of medicine at the UNC-CH School of Medicine's Center for Environmental Medicine and Lung Biology.

"Certainly it doesn't tell the whole story of why children tend to get sick this way, but it is likely a key part of the story. Other factors, for example, are that children are outside more often and exercise more than adults."

A report on the findings will appear in the September issue of Inhalation Toxicology. Dr. Kirby L. Zeman, research associate at the center, was co-author.

Bennett and Zeman asked 16 healthy children between ages 7 and 14, 11 adolescents up to age 18 and 12 adults between ages 19 and 35 to inhale tiny amounts of harmless carnauba wax particles while resting. Using sophisticated laser technology, researchers then measured how much of the particles remained in volunteers' lungs.

They found that while older adolescents and adults inhaled and retained more particles because of their larger lungs, younger volunteers retained about 35 percent more simulated "pollution" per unit of lung surface area.

"These results may prove useful in determining age-relative risks associated with inhaling air pollutants," Bennett said. "We now plan to extend our studies to exercising volunteers. That's because we also found children seemed to be much more sensitive to changes in the volume of air breathed in terms of the amount of particles they retain."

The UNC-CH scientists also will compare mouth versus nose breathing since people switch from breathing nasally to breathing orally at some point during vigorous exercise. They want to know whether children switch earlier and whether that causes them to trap more polluted air in their lungs.

Among strengths of the new study was that for the first time, researchers were able to ensure through an electronic technique called respiratory inductance plethysmography that volunteers' breathing during tests was the same as it was at rest before testing, Bennett said.

"This technique helps us avoid unintentional changes in breathing patterns caused by people breathing through a mouthpiece for the first time," he said.

A device known as a light scattering photometer attached to the mouthpiece measured particle concentrations during breathing. Non-toxic carnauba wax particles are a food additive derived from a Brazilian palm known as "the tree of life." Besides coating candy and pills, it is used as a car finish and leather preservative.

The research was supported through a cooperative agreement between the UNC-CH Center for Environmental Medicine and Lung Biology and the Environmental Protection Agency.


Story Source:

The above story is based on materials provided by University Of North Carolina At Chapel Hill. Note: Materials may be edited for content and length.


Cite This Page:

University Of North Carolina At Chapel Hill. "Children Inhale Higher Percentage Of Pollution, New Research Shows." ScienceDaily. ScienceDaily, 26 August 1998. <www.sciencedaily.com/releases/1998/08/980826082654.htm>.
University Of North Carolina At Chapel Hill. (1998, August 26). Children Inhale Higher Percentage Of Pollution, New Research Shows. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/1998/08/980826082654.htm
University Of North Carolina At Chapel Hill. "Children Inhale Higher Percentage Of Pollution, New Research Shows." ScienceDaily. www.sciencedaily.com/releases/1998/08/980826082654.htm (accessed September 19, 2014).

Share This



More Earth & Climate News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins