1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine
PFCs(Perfluorinated Chemicals)
Manmade chemicals, synthetic
Resistant to heat, water, oil, grease & stains
Stable, extremely resistant to breakdown
Widely used in diverse applications
Economically useful
Electronegativity of Fluorine
Partial charges in the polarized C-F bond
C-F bond
: strongest bond in
organic chemistry
: high energy bond
Two most studied compounds
1. 서론
현재 시판 호상 Yogurt 제품은 법적으로 농후 Yogurt로 구분되어 성분 규격을 성상, 무지 고형분, 젖산균 수, 대장균군, 조지방, 보존 및 유통 기준 등으로 규정하고 있으나 제조하는 회사마다 시장 확대와 소비자의 선호도를 감안하여 자체적인 기준을 설정하여 제조하고 있는 것으로 보인다.
Y