Navigation Links
An atmosphere rich in CO2 and oxygen enhances the quality of refrigerated potato
Date:2/18/2009

This release is available in Spanish.

The potato is a leading human staple diet in the world, with only maize, wheat and rice ahead of it. Its importance as a food is due to its nutritive value, being rich in carbohydrates and for its vitamin C, potassium and phosphorous content. The pattern of consumption has changed over the past few years, in tandem with changes in society and it is increasingly common for the potato to get to homes, not as a fresh product, but processed in some form or other. These latter products are known as fourth range products where fresh vegetables and fruit are cut up and canned/bottled before sale.

From the harvest to their marketing, vegetable products suffer damage produced by the triggering of a series of processes that tend to negatively affect the quality of, in this case, the potato. This tendency can be modulated by a number of control techniques for the surrounding conditions of the products, mainly the storage temperature, the relative humidity and the composition of the surrounding atmosphere.

The study of the effects of the composition of the atmosphere surrounding the processed potato was the objective of the PhD thesis defended by Mr Ignacio ngel Angs Iturgaiz at the Public University of Navarre. His work concluded that an atmosphere rich in carbon dioxide (CO2) and with high concentrations of oxygen (O2) enhances the quality of the minimally processed potato given that these factors slow down the loss processes of water and nutrients, and its change of colour (going a brown colour). This thesis was defended at the Department of Food Technology of the Higher Technical School of Agricultural Engineers. Mr Angs, agricultural engineer and researcher currently undertaking work at the ALITEC research group at the Public University of Navarre.

Combinations of gases

"Empleo de atmsferas ricas en CO2 y altas concentraciones de O2 en la mejora de las caractersticas de calidad de patata mnimamente procesada del cv. Monalisa almacenada en refrigeracin (Employment of atmospheres rich in CO2 and high concentrations of O2 in the enhancement of quality characteristics of minimally processed cv. Monalisa refrigeration-stored potato)" is the title of this thesis, in which Mr Angs analysed the effect these gases have in maintaining the respiratory physiology of a number of physical-chemical properties on the quality of the product (slices of minimally processed potato of the Monalisa variety stored under refrigeration at 4 C over a period of 14 days).

No new gas was introduced during the trials (basically oxygen, nitrogen and carbon dioxide), limiting the modifications to changes in the percentages of the gases. Efforts were focused on marking out the combinations of gases that maximised the characteristics of quality with greater precision. In this way, the qualitative effect of the CO2 on the respiration of the product under study began to be evaluated by means of the technique of passive modification of atmospheres.

Based on this study, the role of CO2 in the respiratory metabolism of the product remains to be determined, and which will enable a series of studies to be initiated under various controlled atmospheres consistent in O2 and CO2 mixtures in variable concentrations. In these studies, the potentiality of the different gaseous combinations to reduce respiratory rates and to minimise colour changes and textural characteristics of the raw material was determined and the guidelines for the final part of the research set out.

Thus, the proportion of oxygen was raised to 80%, compared to the 20.9% in the atmosphere we normally respire, while CO2 with a residual presence, was increased to 20%. This combination is the one that obtained the optimum results, given that, in these proportions, all the processes of degradation of the minimally processed potato from its processing to its end of useful life - are slowed down. During the period a maximum of 14 days - in which the potato was refrigerated at a temperature of 4C, the loss of water, nutrients and texture was slower, as was the onset of discoloration.


'/>"/>

Contact: Oihane Lakar
oihane@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

Related medicine news :

1. As Congress Debates Competitive Bidding Program, Home Oxygen Beneficiaries and Providers Left to Cope with 27 Percent Cut to Medicare Home Oxygen Benefit
2. Worm provides clues about preventing damage caused by low-oxygen during stroke, heart attack
3. Low Cost Oxygen Regulator: Pay Less For Quality
4. Study of Everest Climbers Questions Oxygen Use
5. Massive Cuts to Medicare Home Oxygen Therapy Benefit Taking Effect January 1 Creating Acute Anxiety Among Beneficiary and Provider Communities
6. Facing Deadly Ice Storms, Home Medical Equipment Providers in New England Mobilize to Protect Oxygen Patients
7. Home Oxygen Community Braces for Massive Cuts to Medicares Home Oxygen Benefit Starting January 09
8. Home Oxygen Leaders Commend Sen. Baucus Efforts to Expand Health Care Access, Warn That Deep Cuts in Oxygen Benefit May Undercut Access
9. Sechrist Industries, Inc. Awarded Premier Sole-Source Contract for Hyperbaric Oxygen Chambers
10. Texas Home Oxygen Therapy Community Braces for Hurricane Ike
11. PARI Respiratory Equipment Featured on Oxygen Network
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2017)... ... 2017 , ... New patients with missing teeth in Fitchburg, WI, ... referral. Dr. Cotey is a trusted dentist who has placed many dental implants and ... with missing teeth in Fitchburg, WI, are encouraged to find out if they are ...
(Date:6/25/2017)... ... June 25, 2017 , ... Republicans in the United States Senate on ... the Better Care Reconciliation Act. It differs significantly from the American Health Care Act, ... reconciled in committee, or the House will have to take up the Senate version ...
(Date:6/25/2017)... ... 25, 2017 , ... With a heatwave currently bearing down on Northern California pushing temperatures to ... Being swimsuit ready is easy with laser hair removal. , The process of summer ... burdensome routine when all you want to do is get out, dive in and cool ...
(Date:6/24/2017)... ... June 24, 2017 , ... The Pennsylvania Athletic Trainers’ Society’s ... and Erie Convention Center on June 8-10. The weekend consisted of many ... award and scholarship presentations, and professional networking. , On Friday June 9th, ...
(Date:6/24/2017)... ... ... Doorknobs are for convenience, deadbolts are for security. , There are many ... an alarm system installed. But unless there is a working deadbolt lock that is ... Premier Locksmith in Killeen, TX says: “In the majority of home burglaries, intruders use ...
Breaking Medicine News(10 mins):
(Date:6/5/2017)... Kohll,s Pharmacy & Homecare is the first distributor of ... . The Raizer is a simple battery operated mobile ... an almost-standing position within a few minutes. The ... and does not require any extra effort besides a ... can operate it, and lightweight and portable so ...
(Date:5/30/2017)... , May 30, 2017 Hill-Rom Holdings, Inc. ... Annual Global Healthcare Conference on Tuesday, June 13, 2017, ... John Greisch , Hill-Rom,s president and chief executive officer, is ... The live audio webcast can be accessed at http://ir.hill-rom.com/events.cfm ... conclusion of the live event through September 13, 2017. ...
(Date:5/24/2017)... Va. , May 24, 2017  ivWatch ... Original Equipment Manufacturer (OEM) Board to enable seamless ... with patient monitoring systems, infusion pumps and other ... OEMs will be able to help health care ... and reduced risks related to IV therapy. ...
Breaking Medicine Technology: