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ที่มา:วารสาร คณะสัตวแพทยศาสตร์หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Comparison of the Modified Reagent Test for Total Bacterial Count in Raw Milk with Methylene Blue Reduction Test) ผู้เขียน: Indhira Kramomtong, Thitima Tripipat, Chailai Koowatananukul, Suthep Ruangwises, Kittisak Ajariyakhajorn สื่อสิ่งพิมพ์:pdf AbstractThe study was conducted to develop the modified dye indicator by adding methyl red into methylene blue solution compared with the conventional methylene blue reduction test (MBRT) in terms of the correlation of total bacterial count (TBC), types of bacteria, pH and titratable acidity in raw milk. it was found that the regression line showed significantly close relationship between metylene blue - methyl red reduction test (MMRT) and MBRT. The decoloration time of MMRT was more related to TBC and coliform count than MBRT (R>0.5, p<0.05). Both dye reduction tests were related to pH at 4 and 6 hr. Additionally, the decoloration time of MMRT was correlated to titratable acidit at 4 hr compared to 6 hr with which from MBRT. In the other hand, the lactic acid content of 0.16 0.01 gm% at pH 6.52 0.01 affected dye decolorization from MMRT more obviously than the MBRT. Lactic acid production and pH changes were statistically highly related to coliform and total bacterial counts. Consequently,MMRT can be served as a new dye indicator and facilitate monitoring of milk quality. |