solvent와 잘 섞인다. 증기가 해로우며 피부, 눈, 점막에 자극성이 있으므로 주의해야 한다. 153℃ 이상 가열하면 열분해 된다.
6. methanol(CH3OH)
M.W = 32.04, m.p = -97.8℃, b.p = 64.7℃, d = 0.79
가연성, 독성, 유독성의 액체로 흡입, 섭취 시 독성을 나타낼 수 있으며, 두통, 피로, 메스
Distinguished by glass transition point Tg
Glass-like hard phase -> Robber-like soft phase
Distinguished by melting point Tm
Highly tangled polymer chain – Semi crystalline
absorption to water & other polar molecules in skin.
3. Occlusive vehicles :
①Suppress transepidermal water loss.
② Increase absorption of actives.
Other factors effect penetration of active.
⇒Table 14.
4-1. An active with an acidic pH should be formulated with a pH that is acidic to neutral.
4-2. Actives with a basic pH should be formulated in vehicles that are neutral to s
측정방법)
Mini Vol. Air sampler
Sampling Procedure
소용량 공기포집법 원리 및 특징(Mini volume air sampling method)
Mini Vol. 사용시 주의사항
Mini Vol. Air Sampler Controls
유량 및 농도계산
High vol. air sampler (TSP)
High vol. air sampler(PM10)
채취특성 곡선
베타선 흡수법
(β-ray Absorption Method)
광산란법
(Light scattering method)
Solvent Effect on the Absorption and Fluorescence Spectra of 6-[(2,3-Dihydroxybenzylidene)-amino]Naphthalene-2-Sulfonic acid
ABSTRACT
Solvent effect on the spectra has been widely investigated. We are conducting the research as well using 6-[(2,3-dihydroxybenzylidene)-amino]naphthalene-
2-sulfonic acid. Lots of Schiff base derived from salicylaldehyde and 2-hydroxynaphthaldehyde have been report