화학 제품에 비해 열배에서 수십 배나 비쌌던 바이오폴리머의 가격은 생물공학 기술의 진보 등에 힘입어 불과 몇 배에서 최저 1.2배 정도까지 좁혀졌으며, 유가가 상승할수록 가격 경쟁력은 더욱 커지게 된다.
이렇게 최근 몇 년 사이 바이오폴리머가 가격 경쟁력을 갖출 수 있게 된 것에는 국제적인
the potential ofthe beverage he created. He gradually sold portions of his business to various partners and, just prior to his death in 1888, sold his remaining interest in Coca-Cola to Asa G. Candler. An Atlantan with great business acumen, Mr. Candler proceeded to buy additional rights and acquire complete control.
Learn the rest ofthe history by selecting another chapter from the drop-down
by using solvent. These PHB extracted solvent will experience washing and drying process. After that, PHB can be precipitated as white powder. Most commonly used solvent is Chloroform. After end of this extraction process, the solvent should be separated from water or other impurities and recycled to extraction system because most of solvent is expensive.
2. 3. Compounding
PHB obtained
화학적 과정으로 제거된다.
wafer 표면에 남겨진 모양은 노출에 의해 덮혀져 있던 부분이다.
TEM exposure
웨이퍼의 through hole은 TEM(투과전자현미경)에 의해 닫힐 수 있다.
수소, 탄소의 형성으로 인해 전자가 홀 폐쇄를 촉진 시킨다.
이 방법은 시간이 많이 걸린다.(100nm 홀을 닫는데 한시간정도)
이런
the measured soil in that bottle
3. inject toluene(100ppm, 20ml) in #2 to contamination
4. Close the entrance ofthe bottle with teflon film and shake bottle more than 24 hours
5. After 24 hours inject methanol, hexane(each 20ml)
6. Shake #5 bottle in 2 minutes and let that sinking
7. Centrifugation that sample and get the supernatant liquid
8. Analyze sample by Gas Chromatography(GC)