methods of manufacturing acetaldehyde
1) Reaction of ethanol with silver catalyst
이 방법은 ethanol을 480℃의 공기 하에서 silver catalyst를 이용하여, acetaldehyde를 생산해 내는 방법이다.
2) Wacker oxidation of ethylene
ethylene을 사용함으로써, 위에서 ethanol을 사용하는 방법에 비하여, 더욱 직접적인 방법으로 acetaldehyde를 생
Method
가. 시판되는 일반 시유에 지방함량비율만큼 탈지분유를 첨가하여 용해시킨다. 탈지분유를 이용하여 12% 환원탈지유를 제조한다.
나. 삼각플라스크에 담아 autoclave시킨다. (121℃, 15분)
다. 37℃정도까지 방냉한 후 화염멸균 하에 유산균(starter)을 접종한다.
라. 37℃배양기에서 약 5시간 정도
3. Characterization methods
Fig1. Cross-section of products
1) PVC flooring
A. Existing flooring materials
i. -Resilient flooring is made of material that has some elasticity. It includes many different manufactured products including linoleum, sheet vinyl, vinyl composition tile (VCT), cork (sheet or tile), rubber, and others. Performance surfaces used for dance or athletics are
METHOD
Sampling Frame and Mailing Procedure
Data for the study come from a direct mail survey of top marketing executives drawn from a nationwide sample of manufacturing and service organizations. The mailing list of 2,000 companies was acquired from Dun & Bradstreet.
The sample was randomly drawn. Half of the sample was specified to be firms with more than $500 million in annual revenue an
Brief Intro : Intel
The leader in the semiconductor industry is unquestionably Intel. Following Intel’s lead are AMD, Cyrix, Digital, Motorola, etc. in CPU manufacturing. Intel has abandoned memory division back in 1985 as the Japanese firms became more competitive and gained chunk of the world market share. From then on Intel has concentrated on developing microprocessors along with other p