Volatile organic compounds (VOCs) emitted from industrial gas cause equipment failure and fire accidents due to the rapid flow and concentration changes of VOCs. Therefore, it is crucial to attenuate the concentration of VOCs to ensure a constant emission rate before the control process. This study proposed an encapsulation technique to fabricate calcium- alginate gel beads containing paraffin oil as an effective absorbent. The prepared absorbent was physically characterized, and a column test observed its absorption capacity. When the oil content was 30%, the prepared beads showed the best spherical shape, attaining 96% emulsion stability, 0.014 sphericity factor, 62.7% weight variation ratio, and 4.21 ± 0.06mm diameter. In the column test that was packed with the prepared beads, the toluene absorption capacity was 497.6mg/kg. The net effect of the beads was to attenuate the peaks of toluene concentration, and to make the VOC-laden air stream more receptive for the subsequent treatment unit.

Transcellular transport in epithelial cell is a method for absorbing calcium from intestine to blood, providing effective mechanism of utilizing calcium at low calcium intake. In this study, we aimed at theoretically developing a simple mechanistic model explaining transcellular transport in calcium absorption process. Transcellular calcium transport was schematized into 3 steps which were entry, diffusion, and extrusion. Each step was separately modeled to include the specific feature of them. In detail, electro-diffusion, facilitated diffusion, and Michaelis-Menten kinetics were employed to model calcium entry, diffusion, and extrusion, respectively. Then, the developed models were numerically solved to find a solution which simultaneously satisfied 3 models under steady-state assumption. Result of model simulation was consistent with the known behavior of transcellular calcium absorption, showing that transcellular calcium transport became saturated with increase of luminal calcium concentration. Because transcellular calcium transport depends on calcium binding protein mediated by vitamin D we expect that this model can be used to find optimal regulatory point for increasing calcium absorption.

난각칼슘을 식초에 침지하여 제조한 양조칼슘, 현미칼슘과 난각칼슘분 및 침 강성탄산칼슘을 횐쥐에 식이 후 칼슘의 혈청 중 보유량(흡수율)에 관하여 비교시험 결과는 다음과 같다. 1. 이온화율이 높은 양조칼슘낀폐,통기 현미칼슘의 흡수는 경구투여 2시간 후에 최고치에 이른 것으로 나타났으며 이온화율이 낮은 난각칼슘분이나 침감성탄산칼슘은 이보다 늦은 5시간 후에 최고치에 이른 것으로 나타났다. 이는 이온화율이 높은 칼슘일 수록 흡수가 빠르게 진행되는 것으로 사료된다. 2. 횐쥐에 식이한 칼슘시료의 칼슘의 혈청 중 보유량은 현미칼슘>양조칼슘(밀폐))양조칼슘(통기))침강성탄산칼슘>난각칼슘분 순으로 낮게 나타났다. 이는 이온화율의 순과 같았다 3. 현미칼슘의 혈청중 칼슘농도가 난각칼슘분에 비하여 약 4배 높은 것으로 나타난 것으로 보아 칼슘의 혈청 중 보유량은 칼슘 섭취수준에 의한 영향보다 칼슘 이온화율과 밀접한 관련이 있는 것으로 사료된다. 4. 제조 조건에 따른 양조칼슘의 칼슘의 혈청 중 보유량은 밀폐조건이 통기조건에 비해 약 1.4배 높은 것으로 나타난 이유를 규명하기 위해서는 연구가 계속 진행되야 할 것으로 본다