-20世紀 英國詩-
(1) Thomas Hardy(1840-1928) : "The Darkling Thrush"
"The Darkling Thrush"
1 I leant upon a coppice gate
2 When Frost was spectre-gray,
3 And Winter's dregs made desolate
4 The weakening eye of day.
5 The tangled bine-stems scored the sky
6 Like strings of broken lyres,
7 And all mankind that haunted nigh
8 Ha
Powder at Sample Holder
X-ray diffractometer need to a flat sample plane of 1cm×2cm. We fill up powder at holder to obtain a flat sample plane. A procedure is below(Fig. 10) when we fill up at a general metal holder.
Fig. 10. Filling up at a general metal holder.
1) Put a sample over thick glass plate(A direction of sample holder surface is below).
2) Fill up a powder
II. How is CBM formed
Coalbed methane (CH4) forms in one of two ways. During the earliest stage of coalification (the process that turns plant detritus into coal), biogenic methane is generated as a by-product of bacterial respiration. Aerobic bacteria (those that use oxygen in respiration) first metabolize any free oxygen left in the plant remains and the surrounding sediments. In fresh water
투과전자현미경은 주로 시료의 내부구조나 단면을 관찰하는데 쓰이고 있다. 원리는 광학현미경과 비슷하다. 전자현미경에서의 광원은 높은 진공 상태(1x10-4 이상)에서 고속으로 가속되는 전자선으로 이 전자선이 표본을 투과하여 형광판이나 사진필름에 초점을 맞추어 투사된다. 이 전자의 파장은 가
Water-soluble material-shaving aid material
Molecular weights 에 따라Liquid 또는 low-melting solid 상태로 존재
Physical Properties
Tg= -67oC
Low toxicity
Non-Toxic
의약품, 스킨로션 등
기계적 성질이 안 좋아서 다른 고분자나 이온성 물질과 blend 또는 합성하여 사용
Glass Transition Phenomena
액체를 냉각할 때 물질 고유의 온도