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
3. Requirements of EUV resist
EUV is highly absorbed by all materials, even EUV optical components inside the lithography tool are susceptible to damage, mainly manifest as observable ablation. Such damage that is associated with the high-energy process of generating EUV radiation is a new concern specific to EUV lithography .
EUVL's shorter wavelength also increases flare, resulting in less
Global Trend towards Protecting the Ozone Layer
Global Convention and Protocol
The Vienna Convention (for the Protection of the Ozone Layer)
The Vienna Convention is a treaty concerning the customary international law on treaties between states. It codifies some groundwork of international law trying to protect the ozone layer. The US was the one the biggest producers and consumers of
Ⅰ. 개요
국내 철강생산이 세계 3위라고 하는데 철강을 자르거나 붙이는 것은 모두 용접이다. 기초 기반산업은 5가지(금형, 주조, 단조, 열처리, 용접)로 나누며 그 중 용접기술이 핵심이 되고 가장 기초적인 분야 이므로 오늘날 국내의 자동차, 조선 산업이 이만큼 오기까지는 용접이 실질적으로 많은