Navigation Links
Red delicious, Northern Spy apples have most antioxidants, chemists find

Some apples might do a better job of keeping the doctor away than others, according to Canadian researchers who analyzed eight popular varieties of the fruit. Red Delicious, Northern Spy and Ida Red, they say, pack a greater wallop of disease-fighting antioxidants than other apples studied.

The researchers, led by Rong Tsao, Ph.D., of Agriculture and Agri-Food Canada in Guelph, Ontario, also pinpointed the individual chemical compounds responsible for antioxidant activity in apples. The findings could lead to the breeding of hybrid apples that pack a heftier antioxidant punch.

The report appears in the June 29 issue of the American Chemical Society’s peer-reviewed Journal of Agricultural and Food Chemistry. ACS is the world’s largest scientific society.

Researchers have long known that apples are a good source of antioxidants, a group of chemicals that scavenge and neutralize unstable molecules called free radicals. Free radicals, which can wreak havoc on cells and tissues, appear to play a role in the onset of heart disease and prostate, colon and other cancers.

Polyphenols ?phytochemicals that act like astringents ?are major sources of antioxidants in apples, but which polyphenols are most active in the fruit has perplexed scientists. Tsao and his colleagues used three different laboratory measures to evaluate polyphenol activity in apples that are popular in Canada: Red Delicious, McIntosh, Cortland, Northern Spy, Ida Red, Golden Delicious, Mutsu and Empire apples. However, the researchers did not include a number of other apples popular in the United States including Gala, Granny Smith, Jonathan, York, Stayman and Rome. All of the apples used in the study were grown on the same farm under similar conditions. The researchers found:

* Polyphenols were five times more prevalent in the skin than the flesh of the apples.

* Two polyphenols, epicatechin and procyanidin B2, were the greatest contributors to total antioxidan t activity of the apples. Procyanidins accounted for about 60 percent of the antioxidant activity in the peel and 56 percent in the flesh.

* Red Delicious apples had two times more antioxidant activity than Empire apples, which had the least activity of any of the apples studied.

“When taste and texture do not matter, choosing an apple with a high proportion of polyphenols in the flesh and skin can potentially produce more health benefits,?Tsao said. “But eating any apple is better than eating no apple at all.?/p>

Elsewhere, three recent studies by researchers at Cornell University in New York offer plenty of other reasons to eat more apples:

* Alzheimer’s disease. In rats, quercetin –?another potent antioxidant abundant in apples –?appears to protect brain cells against oxidative stress, a tissue–damaging process associated with Alzheimer’s and other neurodegenerative disorders. This study was published in the December 1, 2004, issue of the Journal of Agriculture and Food Chemistry.

* Heart disease. Antioxidants found in apple extracts could potentially lower "bad" cholesterol (low density lipoprotein, or LDL) by stimulating the production of LDL receptors in the liver, which help remove cholesterol from the blood. This mechanism is similar to that of statin drugs, researchers say. In March, these findings were presented at the ACS national meeting in San Diego.

* Breast cancer. Rats exposed to a known carcinogen and then fed the human equivalent of one, three or six apples a day respectively over 24 weeks were up to 44 percent less likely to develop breast tumors. That study was published in the April 6, 2005, issue of the Journal of Agricultural and Food Chemistry.


'"/>

Source:American Chemical Society


Related biology news :

1. Northern birds are fatter!
2. HortResearch science reveals the natural potential of apples
3. UC Davis researchers reveal apples protective ways
4. Biochemists report discovery of structure of major piece of telomerase; implications for cancer
5. NYU chemists use computer simulation to enhance understanding of DNA transcription
6. Nanowires can detect molecular signs of cancer, scientists find
7. Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find
8. Predators keep the world green, ecologists find
9. Drug dials down the energy within cells, UM researchers find
10. Natural anti-viral enzyme helps keep cancer cells alive, researchers find
11. Gene linked with mental illness shapes brain region, researchers find
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/15/2016)... March 15, 2016 Yissum Research Development ... technology-transfer company of the Hebrew University, announced today the ... sensing technology of various human biological indicators. Neteera Technologies ... million from private investors. ... the detection of electromagnetic emissions from sweat ducts, enables ...
(Date:3/10/2016)... India , March 10, 2016 ... a new market research report "Identity and Access Management ... & Audit, Compliance, and Governance), by Organization Size, by ... to 2020", published by MarketsandMarkets, The market is estimated ... USD 12.78 Billion by 2020, at a Compound Annual ...
(Date:3/8/2016)... RALEIGH, N.C. , March 8, 2016 /PRNewswire/ ... biometric sensor technology, today announced it has secured ... led by GII Tech, a new venture fund ... LLC, with additional participation from existing investors TDF ... use the funds to continue its triple-digit growth ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... April 29, 2016 According ... Market Research "Separation Systems for Commercial Biotechnology Market ... and Forecast 2015 - 2023", the separation systems ... 10,665.5 Mn in 2014 and is projected to ... to 2023 to reach US$ 19,227.8 Mn in ...
(Date:4/28/2016)... 2016 The report "Cryocooler Market ... Service (Technical Support, Product Repairs & Refurbishment, Preventive Maintenance, ... to 2022", published by MarketsandMarkets, the global market is ... at a CAGR of 7.29% between 2016 and 2022. ... 94 Figures spread through 159 Pages and in-depth TOC ...
(Date:4/28/2016)... ... 28, 2016 , ... Morris Midwest ( http://www.morrismidwest.com ), a ... at its Maple Grove, Minnesota technical center, May 11-12. The event will ... Almost 20 leading suppliers of tooling, accessories, software and other related technology will ...
(Date:4/27/2016)... VANCOUVER, British Columbia , April 27, 2016 ... "Gesellschaft" oder "NanoStruck") (CSE: NSK) (OTCPink: NSKQB) ( ... sie im Anschluss an ihre Pressemitteilung vom 13. ... Inc. erhalten hat, ihre Finanzen um zusätzliche 200.000.000 ... auf 4.000.000 Kanadische Dollar zu bringen. Davon wurden ...
Breaking Biology Technology: