barrier function
Maintain homeostasis
by constant recycling of the basal cell layer
Dermis
Fibroblasts
Constitutes the bulk of the skin
Composed of collagen with elastin
and glycosaminoglycans (GAG’s)
major role in the biomechanics of the skin
Hypodermis
Adipose tissue (vascularized, connective tissue)
Contributes to both the thermoregulatory
Shoo
1. 피부의 기능
• 외상(trauma)과 감염(infection)에 대한 저항
- 피부 보호막은 산성막(acid mantle)이라 불림 => 산성(pH4~6)
• 다른 장벽 기능(other barrier functions)
- 물에 대한 장벽 (과도한 물을 흡수와 손실을 예방)
- 자외선에 대한 장벽, 해로운 약품에 대한 방어벽
• 비타민 D 합성(vitamin D synthesis)
- 피부
I. Environment Analysis
Introduction
Lately, South Korea's cosmetic companies are actively entering Japanese market. In particular, low-priced brand companies entering are remarkable. Continuing the long-term recession, Japanese consumers find inexpensive cosmetics. Through this period, cosmetics of South Korea draw popular through low price and good quality. Celebrity publicity is also inf
2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara