diffrence between anaerobic metabolism ja aerobic metabolism. Because of the complexity of bacterial metabolism the report is mainly about the fundamental diffrences in catabolism (enzymes used and energy and products that are gained) and the defenceses that are used against oxidative stress. To write this report different literary sources, review journals and articels have been used to describe the metabolism in anaerobes and in aerobes. Sissejuhatus Metabolism on kõikide rakus toimuvate protsesside ja reaktsioonide ühine nimetaja. Need protsessid võib jagada kahte rühma vastavalt lõhustumis (katabolism) või sünteesi protsesside (anabolism) hulka. Anabolism on lihtsamatest keemilistest ühenditest keerulisemate ühendite sünteesimine. Sünteesi protsessid on vajalikud rakkude kasvuks ja paljunemiseks. Kõik organismid vajavad energiat ja aineid selleks, et sünteesida elutegevuseks vajalike keerulisi
activity in soil. Water (soil moisture) is useful to the microorganisms in two ways i.e. it serve as source of nutrients and supplies hydrogen / oxygen to the organisms and it serve as solvent and carrier of other food nutrients to the microorganisms. Microbial activity & population proliferate best in the moisture range of 20% to 60%. Under excess moisture conditions / water logged conditions due to lack of soil aeration (Oxygen) anaerobic microflora become active and the aerobes get suppressed. While in the absence of adequate moisture in soil, some of microbes die out due to tissue dehydration and some of them change their forms into resting stages spores or cysts and tide over adverse conditions. Therefore optimum soil moisture (range 20 to 60 %) must be there for better population and activity of microbes in soil. 4. Soil temperature: Next to moisture, temperature is the most important environmental factor
seed extract wrapped beef compared to acid bacteria and preferential growth of wrapped beef throughout the study, with a Enterobacteriacea. However, the authors 274 Chapter 14 noticed that aerobically displayed nisin- They found that peroxyacetic acid and acidi- lysozyme treated meat spoiled sooner than fied sodium chlorite were less effective than untreated meat. They attributed this to inhibi- 4% lactic acid against aerobes and coliforms. tion of lactic acid bacteria and a resultant They also found that activity was influenced shift to putrefactive bacterial spoilers. In by plant location. Acidified sodium chlorite summary, a combined lysozyme/nisin/EDTA is approved by the USDA for poultry and mixture may be a promising tool for exten- red meat applications at 500 to 1200 ppm sion of the shelf life of anaerobically pack- (21CFR173.325).
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