and they are an important cause of reduced economic productivity even in advanced countries which have modern food processing and distribution systems. Although the amount of foodborne disease caused by pathogenic bacteria in the United States is not known with accuracy, it was estimated in 1994 by a task force of the Council for Agricultural Science and Technology (CAST) that the number of cases
5. 무핵세포의 세포막의 기능에 대해서 기술하시오
1) 선택투과성(Selective permeability)과 용매의 수송(Transport of Solutes) Permeability barrier 및 Permeability link로서 역할을 하게되는데, liphobic solute에 있어서는 passive penetration이 안되므로 barrier로서 작용하게되며, 또한 permease
에 의한 특정용질의 passive difussion
Abstract
Bioethanol is one of the alternative sources of oil resources which received attention with biodiesel. Many countries produce bioethanol from food sources such as corn and sugarcane, but it causes food-energy conflicts and farmland problem. So it needs to focus on new biomass which is sustainable, renewable, cost-effective and do not occurred any conflicts. Algae are one of the bioma
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
culture) 방식을 이용한다. 이는 일정한 양의 배양액이 담긴 배양용기에 미생물을 배양하는 방법이다. 배양하는 동안 새로운 배지가 첨가되지 않으므로 영양물질은 감소하고 노폐물의 양은 증가한다. 이와 같이 미생물의 성장과정을 시간에 따라 그래프로 그리면 전형적인 성장곡선이 나타난다. 살아있