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antioxidants may improve bread quality
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the quality and shelf life of whole grain bread may be improved by reducing oxidation during storage, according to new research that shows the potential of antioxidant ingredients. the study, published in lwt - food science and technology, measured the oxidative stability of whole grain bread by monitoring levels of antioxidants, oxidation products, and using a sensory analysis. the researchers found that small, but significant changes occur in bread during storage, that may lead to the development of off flavours and odours – and that these changes may be avoidable through a reduction in or prevention of lipid oxidation. “the ability to delay or even prevent lipid oxidation in bread with extended shelf life would entail an improvement in flavour stability and an enhancement in consumer satisfaction,” wrote the researchers, led by sidsel jensen a phd student at the university of copenhagen and aarhus university, denmark. “moreover a product with a higher oxidative stability could contribute to a reduction in the amount of bread returns. “use of antioxidants constitute possible strategies for postponing lipid oxidation and reduce flavour deteriorations that ought to be explored,” they added. volatile compounds the oxidation of unsaturated fatty acids yields a complex mixture of volatile compounds that significantly affects sensory properties of foods even when present in low quantities. previous research has shown such compounds lead to changes in aroma, flavour and taste occur during storage of whole wheat bread. specific changes include the development of aroma and flavour attributes such as ‘acidic’, ‘off’, ‘rancid’ and ‘dust’, together with the taste attributes ‘sweet’ and ‘bitter’. the stability of whole wheat flour and bread is affected by the balance between lipid composition and the presence of different antioxidants. the researchers stated that the characterisation of early oxidative changes occurring during storage should be valuable for the understanding of quality changes for such products, and may provide a tool for shelf life prediction of bread products.
Source :foodnavigator.com
Date :
26
October
2010
Category :
Codiments,Desserts,food additi
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the rancidity of meat products may be lowered by adding oregano oil, allowing formulators to tap the natural trend, and extend the shelf life of products, suggests a new study. researchers from the university of kentucky and mississippi state university report that oxidation of the fat content of the meat was significantly reduced by addition of the oregano oil, but the pereption of off-flavours was increased, showing that more work is needed to perfect the use of oregano oil in such formulations.
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antioxidant-rich dried plums may be a natural alternative to synthetic preservatives for boneless beef roasts, suggests research from the americas. processed boneless beef roast prepared with a puree of dried plums produced only “marginally detectable differences” in the taste, according to research to be published in an upcoming issue of meat science. the study adds to previous research from the same groups at the university of oriente in venezuela and texas a&m university indicating the potential of the plum ingredients in processed meat products.
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