Featured Research

from universities, journals, and other organizations

Rice Grown In United States Contains Less-dangerous Form Of Arsenic

Date:
May 21, 2008
Source:
American Chemical Society
Summary:
Rice grown in the United States may be safer than varieties from Asia and Europe, according to a new global study of the grain that feeds over half of humanity. The study evaluated levels of arsenic, which can be toxic at high levels, in rice worldwide.

A new study analyzing several types of rice finds that grains grown in the United States may be safer than varieties grown in other countries.
Credit: Courtesy of Yamily J. Zavala

Rice grown in the United States may be safer than varieties from Asia and Europe, according to a new global study of the grain that feeds over half of humanity. The study evaluated levels of arsenic, which can be toxic at high levels, in rice worldwide.

Yamily J. Zavala and colleagues point out that rice is a potentially important source of human exposure to arsenic, especially in populations with rice-based diets. Arsenic in rice is of special concern because it accumulates in much higher concentrations in rice than other staple grain crops. The researchers discovered that arsenic contamination of irrigation water was more important than soil contamination in increasing arsenic levels in rice.

Using global arsenic data, the researchers classified rice into two types, where the predominant arsenic forms were either organic or the more toxic inorganic forms. They found that rice from the United States largely contains organic arsenic, which is less easily absorbed into the body and excreted more rapidly than inorganic arsenic.

Rice contaminated with inorganic arsenic prevails in Asia and Europe. The study suggests that breeding new rice varieties that convert inorganic arsenic to organic arsenic would be an "important risk reduction strategy, especially for countries like Bangladesh and India with arsenic contaminated environments and high rice consumption rates."


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal References:

  1. Arsenic in Rice: I. Estimating Normal Levels of Total Arsenic in Rice Grain. Environmental Science & Technology. May 15, 2008. DOI: 10.1021/es702747y
  2. Arsenic in Rice: II. Arsenic Speciation in USA Grain and Implications for Human Health.Environmental Science & Technology. May 15, 2008. DOI: 10.1021/es702748q

Cite This Page:

American Chemical Society. "Rice Grown In United States Contains Less-dangerous Form Of Arsenic." ScienceDaily. ScienceDaily, 21 May 2008. <www.sciencedaily.com/releases/2008/05/080519102012.htm>.
American Chemical Society. (2008, May 21). Rice Grown In United States Contains Less-dangerous Form Of Arsenic. ScienceDaily. Retrieved August 21, 2014 from www.sciencedaily.com/releases/2008/05/080519102012.htm
American Chemical Society. "Rice Grown In United States Contains Less-dangerous Form Of Arsenic." ScienceDaily. www.sciencedaily.com/releases/2008/05/080519102012.htm (accessed August 21, 2014).

Share This




More Earth & Climate News

Thursday, August 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Unsustainable Elephant Poaching Killed 100K In 3 Years

Unsustainable Elephant Poaching Killed 100K In 3 Years

Newsy (Aug. 20, 2014) Poachers have killed 100,000 elephants between 2010 and 2012, as the booming ivory trade takes its toll on the animals in Africa. Video provided by Newsy
Powered by NewsLook.com
Charter Schools Alter Post-Katrina Landscape

Charter Schools Alter Post-Katrina Landscape

AP (Aug. 20, 2014) Nine years after Hurricane Katrina, charter schools are the new reality of public education in New Orleans. The state of Louisiana took over most of the city's public schools after the killer storm in 2005. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
Powered by NewsLook.com
Disquieting Times for Malaysia's 'fish Listeners'

Disquieting Times for Malaysia's 'fish Listeners'

AFP (Aug. 19, 2014) Malaysia's last "fish listeners" -- practitioners of a dying local art of listening underwater to locate their quarry -- try to keep the ancient technique alive in the face of industrial trawling and the depletion of stocks. Duration: 02:29 Video provided by AFP
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