tailieunhanh - Báo cáo khoa học " Characterization of stipe and cap powders of mushroom (Lentinus edodes) prepared by different grinding methods "

The effects of micronization methods, mechanical and jet millings, on the physico-chemical properties of mushroom (Lentinus edodes) powder were investigated in contrast to shear pulverization. The powders of dried mushroom cap and stipe were prepared to obtain six powders. Compared to shear pulverization, mechanical and jet millings effectively reduced particle size and brought about a narrow and uniform particle size distribution. With the same material, powders from mechanical and jet millings had higher values in soluble dietary fiber content, surface area, bulk density, water soluble index and nutrient substance solubility, but lower values in the angles of repose and slide, water holding and swelling capacities than shear. | Journal of Food Engineering 109 2012 406-413 Contents lists available at SciVerse ScienceDirect Journal of Food Engineering journal homepage locate jfoodeng Characterization of stipe and cap powders of mushroom Lentinus edodes prepared by different grinding methods Zipei Zhang a Huige Songa Zhen Penga Qingnan Luoa Jian Minga Guahua Zhao 1 l a College of Food Science Southwest University Tiansheng Road 1 Chongqing 400715 PR China b Key Laboratory of Food Processing and Technology of Chongqing Chongqing 400715 PR China ARTICLE INFO ABSTRACT Article history Received 22 September 2011 Received in revised form 29 October 2011 Accepted 4 November 2011 Available online 13 November 2011 Keywords Mushroom Lentinus edodes Micronization Particle size Physico-chemical properties The effects of micronization methods mechanical and jet millings on the physico-chemical properties of mushroom Lentinus edodes powder were investigated in contrast to shear pulverization. The powders of dried mushroom cap and stipe were prepared to obtain six powders. Compared to shear pulverization mechanical and jet millings effectively reduced particle size and brought about a narrow and uniform particle size distribution. With the same material powders from mechanical and jet millings had higher values in soluble dietary fiber content surface area bulk density water soluble index and nutrient substance solubility but lower values in the angles of repose and slide water holding and swelling capacities than shear pulverized powder. These indexes were tightly dependent on particle size with absolute coefficients beyond . With the same grinding method cap powders possessed higher values in water soluble index swelling capacity bulk density protein and soluble dietary fiber than stipe powders. 2011 Elsevier Ltd. All rights reserved. 1. Introduction Lentinus edodes belongs to the family of Tricholomataceae is famous for its high nutritional value and medicinal properties like .