[ Introduction ]
Ⅰ. Need Of Alternative Energy
The need for alternative energy sources is getting urgent, hence the development of renewable energy is moving fast. Nationally and internationally various individuals and research companies are creating new and exciting energy systems. Some of these apparatus are great works and need improving for massive use. Politician's world-wide are dra
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
heating the charge in the effusion cell in the growth chamber.
The effective beam pressure or flow rate of the gas, called the beam flux, is varied by adjusting the effusion cell temperature.
A shutter is used to “shut off” the beam; in fact, with the shutter closed, the beam is deflected away from the substrate and pumped away through the growth chamber.
Gas Source
CBE (Chemic
1. 지열에너지란?
◦지열은 지구 내부에서 표면을 거쳐 외부로 나오게 되는 열을 말한다. 땅 속 깊은 곳에서는 방사성 동위원소들의 붕괴로 끊임없이 열이 생성되고 있고, 땅 속 마그마는 종종 지각이 얇은 곳에서 화산이나 뜨거운 노천온천의 형태로 열을 분출한다. 이러한 열을 보통 지열이라 부
The atmosphere shields us from the sun's cancer-causing ultraviolet (UV) radiation and also moderates the earth's climate.
The atmosphere is obviously vital for human existence, but we have nevertheless been polluting it for years.
The atmosphere is obviously vital for human existence, but we have nevertheless been polluting it for years.
The atmosphere can be divided vertically into four m