Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Freezing Blueberries Improves Antioxidant Availability

24.07.2014

Frozen blueberries pack more powerful antioxidant punch

Blueberries pack a powerful antioxidant punch, whether eaten fresh or from the freezer, according to South Dakota State University graduate Marin Plumb.


Measuring the phenolic content of the pigments in frozen vs. fresh blueberries gives the researchers a better idea of the fruit’s antioxidant capacity.

Anthocyanins, a group of antioxidant compounds, are responsible for the color in blueberries, she explains. Since most of the color is in the skin, freezing the blueberries actually improves the availability of the antioxidants.

The food science major from Rapid City, who received her bachelor’s degree in December, did her research as part of an honors program independent study project.

“Blueberries go head to head with strawberries and pomegranates in antioxidant capacity,” said professor Basil Dalaly, Plumb’s research adviser. In addition, blueberries are second only to strawberries, in terms of the fruits Americans prefer.

Blueberries are beneficial for the nervous system and brain, cardiovascular system, eyes and urinary tract, Dalaly explained. “Some claim it’s the world’s healthiest food.”

The United States produces nearly 84 percent of the world’s cultivated blueberries, an estimated 564.4 million pounds of blueberries in 2012, according to the Agricultural Marketing Resource Center.

Since blueberries are frozen soon after they are picked, “they are equal in quality to fresh,” Plumb explained. She analyzed the anthocyanin content of blueberries frozen for one, three and five months and found no decrease in antioxidants over fresh berries.

The leaching that occurs from freezing actually increased the anthocyanin concentration, noted Plumb. “The ice crystals that form during freezing disrupt the structure of the plant tissue, making the anthocyanins more available.”

Antioxidants, such as anthocyanins, eliminate free radicals, which are produced through common biological reactions within the body and outside factors such as the sun, pesticides and other pollutants, Dalaly explained. If left to roam free, these free radicals can attack DNA, proteins and lipids resulting in cellular changes that lead to development of diseases such as cancer.

“They have a domino effect,” Dalaly said. “That is why we need to consume at least seven to nine servings of fruits and vegetables a day.”

He teaches a course on phytochemicals—the naturally-occurring chemical compounds in fruits and vegetable, many of which have the potential to boost the immune system and impact diseases, such as cancer and heart disease. His advice is simple: “the greener, or redder, the better.”

Plumb called her undergraduate research project “a very good experience,’ noting that she learned to both ask and answer questions such as “why is this happening this way?” One of the surprises was that she had to use blueberries from Canada and Argentina because they were in season when she did her experimental work.

Plumb concluded: “Blueberries are a great food, very good for you.”

Food Science Program
Food science prepares students for professional positions in the food manufacturing industry or for graduate study. Food scientists apply science to the selection, preservation, processing, packaging, and distribution of food and use creative to develop new food products. Students train in state-of-the-art laboratory facilities. The program offers attractive internship opportunities within the food industry including international experiences. The food industry is searching for individuals interested in product development, technical sales, quality control and research.

About South Dakota State University
Founded in 1881, South Dakota State University is the state’s Morrill Act land-grant institution as well as its largest, most comprehensive school of higher education. SDSU confers degrees from eight different colleges representing more than 175 majors, minors and specializations. The institution also offers 29 master’s degree programs, 13 Ph.D. and two professional programs.

The work of the university is carried out on a residential campus in Brookings, at sites in Sioux Falls, Pierre and Rapid City, and through Cooperative Extension offices and Agricultural Experiment Station research sites across the state.

Christie Delfanian | newswise
Further information:
http://www.sdstate.edu

More articles from Health and Medicine:

nachricht Improving memory with magnets
28.03.2017 | McGill University

nachricht Graphene-based neural probes probe brain activity in high resolution
28.03.2017 | Graphene Flagship

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Transport of molecular motors into cilia

28.03.2017 | Life Sciences

A novel hybrid UAV that may change the way people operate drones

28.03.2017 | Information Technology

NASA spacecraft investigate clues in radiation belts

28.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>