낙동강 상수원수의 오존처리 효과 : II. 회분식 오존처리에 의한 휘발성유기화합물 및 조류제거 효과 II. Removal of VOCs and Algae in Raw Water by Conducting Batch Test of Ozonation Experiments

임영식,이홍재,이도진,허종수,손보균,조주식 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12

This study was carried out to evaluate the pollutant removal efficiencies of the advanced drinking water treatment using ozonation process. For raw water, Nakdong River was used. By conducting batch test of ozonation efficiencies of the ozonation were 94 to 92%, respectively. Removal efficiencies of single VOC compound or mixed VOC compounds in the raw water were 80% to 90% by the ozonation with 2 mg/ℓ dosage and 10 minutes contact time. Removal efficiencies of ABS by the ozonation with 1 mg/ℓ, 3 mg/ℓ dosage and 20 minutes contact time were 83% to 96%, respectively. Almost 67% of chlorophyll-a at the concentration of 38.㎍/ℓ was removed by ozonation at ozone dosage of 1mg/ℓ for 20 min. considering the efficiency of ozone utilization and water treatment, the most effective ozonation could be obtained with high ozone dosage and short and short contact time.

잇솔질 압력에 따른 잇솔강모의 탄력손실도 측정

임선아,서은주,강성귀,성진효 조선대학교 구강생물학연구소 2002 Oral Biology Research (Oral Biol Res) Vol.26 No.2

To investigate the elasticity loss of toothbrush according to the strength of pressure. the shape of brushing plane and the duration of use, thirty toothbrushes of five models were used for this examination among the toothbrushes for adults which have been marketed in the Republic of Korea. After 200g/㎠. 300g/㎠, or 400g/㎠ for 1, 2 or 3 month were loaded on toothbrushes, in rolling method the effect of the duration and strength of pressure and the change of the shape of brushing plane on the elasticity loss of toothbrushes was determined using Toothbrush Stroke Testen(CHUMDAN SYSTEM, Korea). The results are as follows; 1. The elasticity loss of toothbrushes according to 200, 300, or 400g/㎠ pressure was 11.11%, 25.21%, 30.84%, respectively. The elasticity loss of toothbrushes was increased with increasing the strength of the pressure (p<0.001) 2. The elasticity loss of the toothbrushes according to 1, 2, or 3months of the duration of use was in 15.60%, 22.09%, 29.47%, respectively. The elasticity loss of the toothbrushes was increased with increasing the duration of the pressure(p<0.001). 3. The elasticity loss of toothbrushes of convex plane according to 1, 2 or 3 month of the durate of use was 10.36% 18.29% and 24.20% respectively, that of toothbrushes of flat brushing plane according to 1, 2 or 3 months of the duration was 20.08%. 25.87% and 34.74%. respectively. The elasticity loss of the toothbrushes or flat brushing plane was higer than that of convex brushing plane(p<0.05). These results show that the property of the KS is optimal according to the pressure of toothbrushing, the shape of toothbrushos and the duration of toothbrushes using must be checked, and the further studies are needed about that.

Biofilter modeling integrated with Lim’s adsorption model

Eun Ju LEE,Wui Sook JEON,Hye Min YOON,Hye Jin SONG,Byeung Soo KIM,Hee Jeong KIM,Eun Jeong OH,Kwang-Hee LIM 한국생물공학회 2011 한국생물공학회 학술대회 Vol.2011 No.10

만성 요통환자의 복부 심부근과 표재근을 중심으로 한 운동 효과 비교

김진산,이창현,조미주,임연욱,정취산,김선엽 대한정형도수치료학회 2005 대한정형도수물리치료학회지 Vol.11 No.1

Objectives: To compare the efficacy of two types specific exercise intervention (deep and superficial abdominal muscle exercises) in the treatment of patients with chronic low back pain (CLBP). Design: A randomized, comparative, repeated-measures. Subjects: Twenty-four patients with CLBP (at least for 3 months), mean age±SD=51.58±16.21 (yrs). Methods: Twenty-four patients with this condition were assigned randomly to two treatment groups. Both first and second group underwent 3 weeks specific exercise treatment program. The first group specific trained for the deep abdominal muscles. The second group specific trained for the superficial abdominal muscles. Results: After intervention, the first group showed a statistically significant reduction in pain intensity and functional disability levels (p<.05). The second group showed no significant change in these parameters after intervention (p>.05). Conclusions: According to results, a "deep abdominal muscle exercises" treatment approach appears more effective than a "superficial abdominal muscle exercises" treatment in patients with CLBP.

전자코를 이용한 마늘냄새의 감소 효과 분석

손주아,임채란,손희진,강진희,노봉수 서울여자대학교 자연과학연구소 2007 자연과학연구논문집 Vol.19 No.-

Ths effectiveness of reduction of garlic flavor in model solution was investigated using metal oxide sensor of electronic nose. After removing garlic sample (control) it was washed by milk or casein solution. The obtained data from electronic nose were analyzed by principal component analysis. Control Sample was separated from the treatment that was washed with 1, 3, 5% casein solution by first principal component score. There is no difference between 1% casein treatment and 3% casein one. Five percent casein solution was effectively differentiated from control. It means that casein (5%) might be bound with garlic flavor. One percent green tea was effective but it was done by washing rather than binding.

7個 結晶系의 唯一 X-線 回折强度 資料

徐日煥,金光柱,秋錦洪,李珍昊,林星秀,柳保盈,金文執 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.1

한 結晶의 構造는 唯一單位의 X-線 回折强度資料로부터 決定될 수 있다. Miller指數(hkl)의 函數인 回折强度Ⅰ(hkl)는 異常 散亂(anomalous scattering)이 無視될때 對稱中心點群 卽 Laue群의 對稱性을 나타낸다. 이 論文에서는 모든 結晶系에 對한 回折强度의 唯一單位를 Laue群들의 對稱性으로부터 誘導하여 놓았다. Crystal structures can be determined from the unique data of X-ray intensity. As the X-ray intensity Ⅰ(hkl), which is a function of diffraction plane (hkl), has a center of symmetry assuming anomalous scattering is negligible Ⅰ(hkl) shows the symmetry of a centrosymmetric point group, i.e., a Laue group. In this paper the unique data of the intensity for all crystal systems have been derived from the symmetries of Laue groups.

국내 주요호수의 육수학적 조사 (1) : 옥정호

김범철,박주현,이병진,허우명,황길순,최광순,채기숙 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

The limnological survey of Lake Okjong was conducted for one year from June 1993 to May 1994 on the monthly basis. The loading of phosphorus, nitrogen and organic carbon from the watershed into the lake were monitored at the main in flowing sites. Secchi disc transparency , epilimnetic chlorophyll a, total nitrogen, total phosphorus concentration and primary production were in the range of 1.3~4.H m, 2.4~ 18.7 mg Chl/m³. 1.25~2.87 mg N/l, 7~65 mg P/m³, 325~2,113 mg C/m²/day, respectively. TN/Tl atomic ratio varled from 129 to 443. N/P ratio decreased in summer because phosphorus concentration was higher than in winter, while nitrogen did not vary much. The seasonal succession of phytoplankton was distinct. In winter and spring, diatoms, Aulacoseira granulata var. angustissima and Aulacoseira italica were dominant while cyanobacteria, Microcystis sp.,M. ichthyovlabe, Phormidium sp. and P.valderianum var. tenuis were dominant in warm seasons. The dominant zooplankton species were Thertmocyclops taihokuensis in warm seasons while Boosmina longirostris were dominant in cold seasons. The organic carbon, nirtogen and phosphorus content of lake sediment were 8.0~14.8, 0.59~0.71, 1.14~1.87 ng N/g, respectively. The sediment of Lake Okjong can be classified as oligohumic based on C/N ratio. The total phosphorus loading from the watershed and fishfarm were estimated to be 2.7g P/m²/yr, which far exceeded the critical loading for eutrophication. The organic carbon loading from the watershed and primary production were determined to be 998t C/yr, 6,348t C/yr, respectively. Most of organic carbon was contributed by autochthonous primary production of phytoplankton. Trophic state of Lake Okjong can be classified as eutrophic

국내 주요 호수의 육수학적 조사(4): 주암호

김범철,박주현,허우명,임병진,황길순,최광순,최종수 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

In this study limnological characteristics of Lake Juam was surveyed from June 1993 to May 1994 in order to provides important information regarding water resources. Seschi disc transparency, epilimnetic chlorophyll a(chl-a), tatal nitrogen(TN), total phosphorus(TP) concentration and primary productivity were in the range of 2.0~4.5 m, 0.9~13.6 mgChl/㎥, 0.78~2.32N/l, 11~56 mgP/㎥, 270~2,160mgCm^(-2)day^(-1), respectively. On the basis of TP, Chl-a and Secchi disc depth, the trophic state of Lake Juam can be classified as mesotrophic lake. The phosphorus inputs from non-point sources are concentrated in heavy rain episodes during the monsoon season. As a result, phosphorus concentration are higher in summer than in winter. TP loading from the watershed were estimated to be 0.9 gPm^(-2)yr(-1), which correspond to a boundary of the critical loading (1.0 gPm^(-2)yr(-1), which correspond to a boundary of the critical loading (1.0 gPm^(-2)yr(-1)) for eutrophication. From the results of the algal assay, both phosphous and nitrogen act as limiting nutrients in algal growth. The seasonal succession of phytoplankton community structure in Lake Juam was similar to that observed in other temperate lakes. Diatoms(Asterionella formosa and Aulacoseira granulata var. angustissima) were dominant in spring and winter, cyanobacteria (Microcystis aeruginosa, M. sp. and M. viridis) were dominant in warm season. The organic carbon, nitrogen and phosphorus content of lake sediment were 9.5~14.0 mgC/g, 1.01~1.82 mgN/g, and 0.51~0.65 mgP/g, respectively. The allochthonous organic carbon loading from the watershed and autochthonous organic carbon loading by primary production of phytoplankton were determined to be 1,122 tC/yr and 6,718 tC/yr, respectively. To prevent eutrophication of Lake Juam, nutrient management of watershed should be focus on reduction of fertilizer application, proper treatment of manure, and conservation of topsoil as well as point source.

規則的 反射條件으로 分類된 空間群

徐日煥,金光柱,秋錦洪,李珍昊,林星秀,柳保盈,金文執 충남대학교 자연과학연구소 1992 忠南科學硏究誌 Vol.19 No.1

各 結晶格子는 230個 空間群 中 하나로 記述되는 對稱性을 가지고 있으며 그 結晶의 構造를 밝히기 爲하여는 그 結晶이 屬한 空間群을 반드시 알아야 한다. 이 論文에서는 230個 空間群을, 그 結晶이 가지고 있는 反射條件에 依하여 明白히 決定되는 空間群과 空間群間의 共通的인 反射條件 때문에 結晶의 構造가 밝혀진 後에야 밝혀지는 空間群으로 分類하여 놓았다. Every crystal lattice has a symmetry which is described by one of the 230 space groups and the space group of a crystal must be known in order to elucidate its structure. In this paper the 230 space groups are classified into two categories, i.e., the space groups that are explicitly determined by the reflection conditions the crystals have and the others that are determined only after the elucidation of the crystal structures because of the common systematic reflection conditions between the space groups.

오렌지로부터 아플라톡신B₁의 정량분석에 관한 연구

장향동,백광균,구경림,옥선미,최진석,고은주,류성렬 한국공업화학회 2004 응용화학 Vol.8 No.2

Aflatoxin B₁ was known to have the strongest poisonous character among Aflatoxin compounds. To search the production of Aflatoxin B1 according to the change of temperature, relative humidity and incubation days, orange incubated with Aspergillus parasiticus KCCM 35078 was incubated at 20℃, 25℃, 30℃ at relative humidity 60%, 70%, 80% and for incubation time 3, 4, 5, 6, 7 days.. Production of Aflatoxin B₁ shows that the highest production appeared at 25℃ and its relative humidity 70%. The result that was quantitatively analyzed by using HPLC was 77.41ppm, and by using Fluoroscence detector was 87.87ppm. - Production of Aflatoxin B₁ shows that the lowest production appreared at 20℃ and its relative humidity 80%(HPLC), 60%(Fluoroscence detector). The result that was quantitatively analyzed by using HPLC was 4.47ppm, and by using Fluoroscence detector was 4.17ppm. The structure of Aflatoxin B₁ was identify with authentic sample by using instrumental analysis methods of GC/MS, ¹H-NMR, FT-IR respectively.