Hyaluronic acid is natural polysaccharide existing around skin or cartilage, and is known as a moisturizing factor. It is expected that hyaluronic acid cosmetics market will continue to grow in the future, as its use and demand increases, like medical supplies and health food besides cosmetics containing hyaluronic acid. However, There are few present studies on content in cosmetics containing hyaluronic acid. The purpose of this study was to evaluate satisfaction and examine what effect was produced on sebum and moisture in skin after applying to cosmetics the hyaluronic acid helpful in maintaining moisture in skin at 5%, 20% and 50% concentration. For 71 days, a clinical trial in a total 39 persons living in the national capital region was carried out. And sebum and moisture was measured through skin diagnosis system A-ONE TAB before trial and each day when clinical trial was conducted for hyaluronic acid content group. Besides, this study was to examine subjects' general characteristics, eating habits, and living habits, and satisfaction after the clinical trial. This study analyzed a difference according to the time to measure the skin condition among hyaluronic acid content groups by utilizing statistical package program SPSS v. 21.0 through data coding and data cleaning process. There was no statistically significant difference in hyaluronic acid content according to any of demographic characteristics, eating habits and living habits among groups (p>.05). With regard to hyaluronic acid content, there was no statistically significant difference in moisture and sebum prior to clinical trial in T zone and U zone among groups (p>.05). A change of moisture in T zone among groups according to hyaluronic acid content showed statistically significant difference in the 2nd week (F =3.636, p<.05). And the highest level was shown in 50%(44.15±2.672), being followed by 20%(43.15±2.340), and 5%(41.62±2.219). Accordingly, it was shown that, as hyaluronic acid content relatively increased, the moisture in T zone increased. In the results of analyzing the change of moisture in U zone, the change of sebum in T zone and U zone by group according to hyaluronic acid content, no statistically significant difference was shown in sebum level of T zone by group(p>.05). For analyzing the subjective satisfaction after clinical trial among groups according to hyaluronic acid content, satisfaction score was the highest in 'skin moistness' (4.38±0.650) for 5% group, 'skin moistness' (4.69±0.480) for 20% group and 'skin texture smoothness' (4.54±0.519) for 50% group. And no statistically significant difference was shown in each subjective satisfaction by group according to hyaluronic acid content(p>.05). It was thought that the results of skin condition and subjective satisfaction survey according to hyaluronic acid content would be baseline data for developing cosmetics containing the hyaluronic acid and marketing a skin moisturizer.

Poly(oxypropylene-oxyethylene glycol) block copolymer(PBC) oil dispersant, which has low toxicity, high biodegradability, and an excellent dispersion efficiency to crude oils and weathered W/O emulsion was prepared by blending PBC, poly(oxyethylene) oleate, and sorbitan monooleate. The dispersing efficiency was measured by swirling flask method. The PBC oil dispersant had an excellent dispersing efficiency to weathered oil products formed as stable W/O emulsion, and the low toxicity, such as 4000 ppm to Oryzias Latipes(24 hr, TLM), Brine Shrimp Artemia(24 hr, TLM).

Polyoxyethylene monooleate was prepared by addition of ethylene oxide to oleic acid. And also, polyoxyethylene monooleate type oil dispersant was prepared by blending polyoxyethylene monooleate, n-paraffine, sorbitan monooleate, sorbitan monopalmitate, and palm oil. Dispersion efficiency test was carried out by vertical shaking flask and swirling flask methods. Low toxic oil dispersant was prepared with polyoxyethylene monooleate, which has high biodegradability and excellent dispersion efficiency on crude oils and weathered W/O emulsions with high viscosity, and its dispersion efficiency was measured to various crude oils and weathered oils.

Low toxic concentrated oil dispersant using n-Paraffin and Di(ethylene glycol)mono butylether mixed solvent was prepared, and tested by oil dispersant performance test method, and oil dispersant efficiency was measured using vertical shaking method to 3 kinds of Crude oil, Bunker oil and W/O emulsions with different physical properties by appling the prepared dispersant. Although toxicity test was performed with Flat fish and Rock fish by appling the mixed oils emulsified using prepared oil dispersant, couldn't find the toxicity to them. Concentrated oil dispersant prepared has a good dispersion efficiency of 97.2% after 0.5min settling time and 28.3% after 10min settling time to Bunker B oil with 10% water solution. Especially, the concentrated oil dispersant showing the low toxicity to Oryzias Latipes(24hr, TLm) was 54,000 ppm and to Brine Shrimp Artemia(24hr, TLm) was 51,000ppm, and also, it was completely biodegradated to 99.1% after 7~8days.

Oil dispersants using polyoxyethylene monooleate, polyoxyethylene oleylether, and poly(oxypropylene-oxyethylene)glycol block copolymer were prepared, and oil dispersant efficiency was measured using vertical shaking flask method to 4 kinds of Bunker B oil with different physical properties by appling the prepared dispersants. Although the dispersant efficiency was differed according to the differences of physical properties of Bunker B oil, the dispersant prepared using polyoxyethylene oleylether was the most effective to disperse the oil into water. The impurities like surfur contained in sample oil have to be removed by filteration to obtain the correct degree of absorption using UV spectrophotometer.

본 연구에서는 연령별 수분함유량, 유분함유량 및 경표피수분함유량에 대한 데이터를 비교 분석함으로써연령별 피부 특성 차이를 규명하여 향후 화장품 산업개발에 도움을 줄 수 있는 기초자료를 제공하고자 한다.피험자 남녀 총 638명을 대상으로 볼 부위의 수분함유량, 코 끝 부위의 유분함유량, 볼과 전박부위의 경표피수분손실량을 측정하였으며, Statistical Package for the Social Sciences (version 19.00; SPSS Inc.,Chicago, IL, USA) 프로그램을 사용하여 분석하였고 피험자에 대한 정보뿐 아니라 피부 수분함유량, 유분함유량, 경표피수분손실량의 피부 측정치 결과를 평균 ± 표준편차로 나타내었다. 그 결과 볼 부위의 수분함유량은여성이 남성보다 높았으며, 연령이 높아질수록 수분함유량이 증가하였다. 또한 코 부위의 유분함유량은 남성이여성보다 높았으며 연령이 낮아질수록 유분함유량이 증가하였다. 볼 부위의 경표피손실량은 여성이 남성보다높은 반면, 전박 부위의 경표피손실량은 남성이 여성보다 높았다. 이상의 연구 결과로 추후 화장품 산업에서 연령별, 성별 기초화장품 개발 등에 도움을 줄 수 있는 기초자료로 활용될 수 있을 것이라 사료된다.

An inverse fluidized-bed biofilm reactor (IFBBR) was used for the treatment of highly-emulsified oily wastewater. When the concentration of biomass which was cultivated in the synthetic wastewater reached to 6000㎎/L, the oily wastewater was employed to the reactor with a input COD concentration range of 50㎎/L to 1900㎎/L. Virtually the IFBBR showed a high stability during the long operation period although some fluctuation was observed. The COD removal efficiency was maintained over 90% under the condition that organic loading rate should be controlled under the value of 1.5 ㎏COD/㎥/day, and F/M ratio is 1.0㎏COD/㎏VSS/day at 22℃ and HRT of 12 hrs. As increasing organic loading rates, the biomass concentration was decreased steadily with decreasing of biofilm dry density rather than biofilm thickness. Based on the experimental results, It was suggested that the decrease in biofilm dry density was caused by a loss of biomass inside the biofilm.

Recently, researches on oil crops Ln Korea were breeding on edible oil crops such as rapeseed sesame, peanut , periLla.Numerous varieties were released as a result of ective breedingworks on edible oil crops, that is 7 rape varieties including Yu-dal, Mokpo-11, Yongdang, Nozeogchae, Naehan, Yeongsanyuchae and Ch-eongpungyuchae (hybrid),5 varieties sesame including Suweon-5,9,21,Kwangsan99ae and Dabaekggae, 5 peanut varieties including Seodun-tangkonT,Yeonghotangkong, 01tankong , ShinpungtanTkong and SaedI-tanGkong, 3 periLLa varietLes including Daegu, Suweon8 and 10,res-pectively. This varietLes showed a good oil quality with high o-Leic and LinoLeic acids content, but periLLa oil seemed to be un-suitable for a edible use, since about 53 Percent of Its fatty a-cids was in the from of unsaturated LinoLenic acid