Study On The Inhibition Of Ginger Extract Against Food Coliform Bacteria

This paper mainly studied the ginger extract inhibition of coliform bacteria in food.Compared the soxhlet extraction, atmospheric distillation extraction, ultrasonic assisted extraction and microwave-assisted extraction method to extract the bacteriostatic effect. This paper discusses the different parts of ginger and bacteriostatic best conditions to explore the ginger extract can inhibit the coliform group in food and its effect, become a new type of natural antiseptic antibacterial agent for ginger extract provide theoretical data. The main results and conclusions are as follows:1. The size of the bacteriostatic circle radius as the judgement indexes, compare the soxhlet extraction method, the atmospheric distillation, ultrasonic assisted extraction, microwave assisted extraction from ginger extract effects on food coliform bacteria. Results show that with soxhlet extraction method for the optimal, the optimal extraction conditions of material liquid ratio 1:12, extracting time 3.0 h and extraction temperature 50 ℃.2. The size of the bacteriostatic circle radius as judgement index, discusses on the ginger, peel ginger, ginger skin and ginger straw influence on food coliform group,found that the straw extract and peel ginger extract inhibit food coliform bacteria effect is better, and bacteriostatic optimal conditions for straw ginger extract: pH is8.5, filter soak time is 46 minutes, extract concentration is 310 g/L; Peel ginger extract bacteriostatic optimal condition is: pH is 7.0, filter soak time is 46 minutes,extract concentration is 310 g/L.3. By adopting the Design- Expert 8.0.5 software for straw extracts and peel ginger extract solution heat resistance of the single factor analysis of variance, the experimental results showed that both have good heat resistance, peel ginger extract heat resistance is better than the straw ginger extract.4. Through artificial add food coliform bacteria suspension in liquid food to studied the straw extracts and peel ginger extract bacteriostatic effect in food. Studieshave shown that both have bacteriostasis in food, peel ginger extract in the apple cider vinegar, chestnut juice and milk food coliform bacteria effect is obvious.