Chapter 10 Food deterioration caused by microbes
Chapter 10 Food deterioration caused by microbes
SectionA Grain deterioration 1. Formation of grain microbial flora micron ertain ecologic 1.1 major sources of grain micobes Soil, water, air, transportation, processing storage appliances 1.2 existent position of grain microbes Mainly on the surface, some in the cortex layer
SectionA Grain deterioration 1.Formation of grain microbial flora ⚫ flora: groups of microbes existed in a certain ecological conditions 1.1 major sources of grain micobes ⚫ Soil, water, air, transportation, processing, storage ,appliances 1.2 existent position of grain microbes ⚫ Mainly on the surface , some in the cortex layer
2. Major microbial groups in the grain and heir detrimental effects 21 bacterial Newly cropped grain has the largest amount of bacteria Don't endanger the grain quality under conventional storage condition
2. Major microbial groups in the grain and their detrimental effects 2.1 bacterial ⚫ Newly cropped grain has the largest amount of bacteria. ⚫ Don’t endanger the grain quality under conventional storage condition
actinomyces Mostly indwell grains carry the mud Mainly endanger those grains with high Water content 2.3 yeasts Little quantity in the grains Endanger the grains with high water content and stored in a sealed condition
2.2 actinomyces ⚫ Mostly indwell grains carry the mud ⚫ Mainly endanger those grains with high water content 2.3 yeasts ⚫ Little quantity in the grains ⚫ Endanger the grains with high water content and stored in a sealed condition
2.4 moulds Major groups are aspergllus, penicillium,镰刀菌 The major detrimental microbes in the grain
2.4 moulds ⚫ Major groups are aspergillus, peniicillium,镰刀菌 ⚫ The major detrimental microbes in the grain