한방과 식품분야에서 널리 이용되고 있는 쑥의 특성 중 항미생물 효과에 대한 연구를 하였다. 쑥씨에서 분리한 정유를 GC, GC-MS로 분석한 결과 77종의 휘발성 물질이 동정되었고 그 중에서 가장 많이 존재하는 것은 campher(14.242%), borneol(12.812%), 1.8-cineol(6.437%), terpinen-4-ol(1.185%) 등으로 전체 정유성분의 약 35%를 차지했다. 이들 4종과 Mugwort seed extract(essential oil)를 가지고 대표적인 식품 미생물인 S. cerevisiae, L. mesenteroides, L. plantarum, A. oryzae와 B. subtilis 그리고 식품오염 정도의 지표 미생물인 E. coli 등의 생육에 미치는 항미생물 효과를 측정한 결과 terpinen-4-ol이 가장 효과가 커 1000ppm 정도로 미생물의 생육을 거의 억제시켰으나 cineol, essential oil은 효과가 그다지 크지 않은 반면에 borneol과 campher는 항미생물 효과가 미약했다.

Removal of siloxane compounds is very important to protecting the biogas energy conversion system from decreased efficiency and parts damage. Among various siloxane removal technologies, adsorption towers are mostly used for performance and ease of operation. However, due to the difficulty of measuring the concentration of siloxane compounds in the gas stream and the complicated matrix of siloxane compounds, adsorption characteristics are not well known. In this study, the adsorption characteristics for multi siloxane components are experimentally studied. Four siloxane components are vaporized in the nitrogen stream supplied continuously to a lab-scale adsorption tank with commercially available silica gel or activated carbon and an FTIR (Fourier-transform infrared spectroscopy) analyzer was used for the online siloxane analysis to find out the adsorption characteristics. While a mixture of L2, L5, D4 and D5 adsorption capacity of silica gel and activated carbon are similar -11.13 and 11.56wt% respectively-adsorption characteristics of each adsorbent was well distinguished in terms of breakthrough behavior. Silica gel shows sequential breakthrough for each siloxane compound and a more noticeable unique time range for Rc > 1, while relatively simultaneous breakthrough was shown for activated carbon adsorbents.