LONG LIFE BREAD-NEW TECHNOLOGY

Bread making was an art or skill till about 5 decades ago. But enormous strides made by bakery scientists since then in developing more and efficient technologies and reducing the time required to make high quality bread products have resulted in taking guess work and gut feeling out of reckoning. But there is one area where little headway has been made and this is with regard to extending the shelf life of the product without adversely affecting its eating quality. Now comes the news that a bakery company in the US has come out with a claim that it can make bread with 60 days life! Here are some details about the above claim and in absence of much technical data it is very difficult to vouchsafe for the veracity of the claim.

"One of the biggest threats to bread is mould. As loaves are usually wrapped in plastic, any water in the bread that evaporates from within is trapped and makes the surface moist. This provides excellent growing conditions for Rhizopus stolonifer, the fungus that leads to mould. In normal conditions, bread will go mouldy in around 10 days. But an American company called Microzap says it has developed a technique that will keep the bread mould free for two months. At its laboratory on the campus of Texas Tech University in Lubbock, chief executive Don Stull showed off the long, metallic microwave device that resembles an industrial production line. Originally designed to kill bacteria such as MRSA and salmonella, the researchers discovered it could kill the mould spores in bread in around 10 seconds. "We treated a slice of bread in the device, we then checked the mould that was in that bread over time against a control, " he explained. "And at 60 days it had the same mould content as it had when it came out of the oven."

Making a product last long is not a difficult task if the sensory quality of the food product is not kept in focus. There are a few chemical preservatives available to day that can inhibit the growth of most microorganisms but such methods cannot prevent chemical or physical changes that occur in all foods at moisture levels beyond 2% at temperatures above zero degree centigrade. In a product like bread with a moisture content of 40% and under ambient conditions staling is bound to take place and according to present state of knowledge there are no fool proof technology yet to prevent staling. stale bread is characterized by crumbling and powdering with the texture of the product getting lost progressively in a matter of few hours. The new method reported above involves treatment of the packed bread with microwave radiation which is supposed to destroy fungal spores but whether it will affect the typical texture of bread adversely is not clear. Retrogradation of starch grains in the bread during storage is a reversible phenomenon and probably bread preserved with the method reported above may regain its texture if it is reheated under optimum conditions in a kitchen microwave oven.

V.H.POTTY
http://vhpotty.blogspot.com/
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