2.2 그라운드 앵커(Ground anchor) 공법
그라운드 앵커(Ground Anchor)는 구조물의 지반에 접하는 부분과 정착부와의 사이를 강재로 연결하여 그 강재에 높은 긴장력을 도입하는 공법으로 토류벽의 지보, 옹벽보강, 사면 안정, 지하수에 의한 부력방지 등에 많이 이용되고 있다.
<그림 2.2 그라운드 앵커의 구
저항성이 유도되기 때문이다. 이러한 예로는 바이러스를 이용하는 교차보호와 다른 여러 병원균에 의한 유도저항성(induced resistance) 또는 전신획득저항성(systemic acquired resistance)이 알려져 있다. 이 장에서는 식물병의 전염원과 병원체의 전염방법과 바이러스병의 식물저항성에 대해 설명하기로 하자
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
resistant varieties of crops, and they have cultivated south-facing slopes as well as richer bottomlands to ensure production even in years with summer frosts. Most farmland had originally been either forest or swamp, and the soil had usually required treatment with lime and years of cultivation to neutralise excess acid and to develop fertility. Irrigation was generally not necessary, but draina
resisted it.
But how could there be union
with a section of the country...
...that wants to impose
its will through coercion?
Now that Virginia confronts the armed
might of the United States...
...we Virginians have determined
that not one spot of her sacred soil...
...be polluted by the foot of an invader.
Now, in the memory of that great
Virginian, George Washington...
...who was first in the h