소리쟁이 에탄올 추출물의 항산화 활성 및 뿌리의 중금속 흡착능에 관한 연구

정갑섭(Jeong, Kap-Seop) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.2

소리쟁이 에탄올 추출물의 환원력, 전자공여능, 산화안정도 등 항산화활성과 소리쟁이 분말에 의한 수중의 Pb(II)와 Cd(II)의 흡착성능을 측정하였다. 추출액의 고형분 함량에 의한 추출율은 추출조건에 따라 1.9~3.0%로서 추 출용매비가 낮을수록, 추출온도가 높을수록 증가하였고, 환원력과 전자공여능은 용매비에 반비례하고 추출온도에 비 례하였으며, 20배의 용매비와 75℃의 온도에서 추출물의 환원력과 전자공여능은 ascorbic acid의 86.4%와 91%에 각 각 대응되었다. 옥수수 배아 식용유에 대한 추출물의 산화안정성은 실험 조건에 따라 합성 항산화제인 BHT의 86~91.3%의 성능을 보였다. 그리고 소리쟁이에 의한 중금속 흡착능은 Cd(II)보다 Pb(II)가 훨씬 높았으며, 흡착시간 60분에서 초기 농도 20ppm의 경우 Pb(II)의 흡착률은 88%이었으며, Cd(II)는 Pb(II)의 92%정도로 나타났다. Antioxidant activities such as reducing power, electron donating ability(EDA) and oxidation stability of Rumex crispus extracts with ethanol were examined, and adsorption of Pb(II) and Cd(II) with dried Rumex crispus powder in aqueous solution was experimented. Extraction yields based on the soluble solid contents ranged 1.9% to 3.0%, and were inversely proportional to solvent ratio but proportional to extraction temperature. Reducing power and EDA were also increased with extraction temperature but decreased with solvent ratio. These were corresponded to 86.4% and 91.0% of ascorbic acid reducing power and EDA, respectively, on 20 folds of solvent ratio and 75℃. Oxidation stability of Rumex crispus extracts on the corn seed oil was 86~91.3% of butylated hydroxytoluene. Pb(II) adsorptivity of Rumex crispus was higher than Cd(II), and adsorption rate of Pb(II) was 88% in 20 ppm concentration and 60min.

UV/TiO₂공정을 이용한 수중 Tartrazine의 광촉매 분해

정갑섭 ( Kap-seop Jeong ),나석은 ( Seok-eun Na ),이화수 ( Hwa-soo Lee ) 한국고등직업교육학회 2004 한국고등직업교육학회논문집 Vol.5 No.2

The characteristics of photocatalytic degradation of tartrazine(abbreviated to TTZ) using UV/TiO₂ process was studied in a batch reactor under constant strength of ultra-violet ray; effects of the initial concentration of TTZ, effects of dosage and structural form of TiO₂, effects of oxidants, effects of initial pH of TTZ aqueous solution on the removal of TTZ. The degradation rate was increased with decreasing pH and initial concentration of TTZ, and with the increasing dosage of TiO₂ and oxidant. Anatase structure of TiO₂ was more effective than rutile one below the dosage of 1g. KBrO₃ was more effective oxidant than (NH₄)₂S₂O₈. The photocatalytic degradation rate of TTZ was pseudo-first order with rate constants of 0.011, 0.025, 0.035 and 0.058min^-1 at 0.1, 0.5, 1.0 and 5.0g dosage of anatase TiO₂, respectively.

TOA에 의한 아크릴산의 추출도에 관한 연구

정갑섭 ( Kap-seop Jeong ),박종태 ( Jong-tae Park ) 한국고등직업교육학회 2001 한국고등직업교육학회논문집 Vol.2 No.1

The effects of the concentration of extractant, the property of solvents and the temperature on the extraction degree, and the extraction mechanism were investigated in the physical and the reactive solvent extraction of acrylic acid with TOA(tri-n-octylamine) under several solvents. The extracted species were found to the type of A3R and A2R under benzene, MIBK and BA, respectively. The extraction degree was increased whereas the extraction loading was almost constant with the concentration of TOA, but decreased with extracting temperature. By increasing the dielectric constant of solvents and decreasing the difference of solubility parameters between solvent and solute, the extraction degree was increased. The dependence of equilibrium constant on temperature was expressed as lnK = a + bT^-1

산화아연 현탁액을 이용한 염료의 광분해에 관한 연구

정갑섭 ( Kap-seop Jeong ),나석은 ( Seok-eun Na ) 한국고등직업교육학회 2003 한국고등직업교육학회논문집 Vol.4 No.4

The characteristics of photocatalytic degradation of dyes with zinc oxide suspension was studied in a batch reactor under constant strength ultra-violet ray. Zinc oxide was more effective photocatalyst than titanium dioxide in degradation of water soluble dyes. The degradation rate was increased with increasing the oxidant concentration, but didn't show manifest difference with initial pH of solution. The degradation rate of methyl orange, eosin Y and rhodamine B was pseudo-first order, and was in order of rhodamine B>methyl orange>eosin Y with photocatalytic rate constants 0.067min-1, 0.058min-1 and 0.048min-1 for rhodamine B, methyl orange and eosin Y, respectively.

쇠무릎과 청미래덩굴 부위별 추출물의 이화학적 특성에 관한 연구

정갑섭(Jeong, Kap-Seop) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.7

야생생물자원의 기능성 탐색의 일환으로 쇠무릎과 청미래덩굴의 부위별 추출물에 대한 몇 가지 이화학적 특성을 비교·고찰하였다. 추출률은 증류수>메탄올>에탄올 순이었으며, 추출된 유리 아미노산은 총 16종으로서 쇠무릎 은 proline이, 청미래덩굴은 phosphoserine과 glutamic acid의 함량이 가장 높았다. 갈변도와 방향족 화합물 함량은 청 미래덩굴 잎은 메탄올 추출물이 가장 높고 에탄올, 증류수 순이었으나, 쇠무릎 잎의 경우 증류수 추출물의 흡광도가 가장 높고, 메탄올, 에탄올 순으로 나타났다. 청미래덩굴 잎과 뿌리의 전자공여능은 잎은 에탄올>메탄올>증류수, 뿌 리는 메탄올>에탄올>증류수 순이었고 쇠무릎은 증류수>에탄올>메탄올 순이었다. 올리브유에 대한 산화억제 작용은 TBA가를 기준하여 합성 항산화제인 BHT에 비해 쇠무릎 잎은 82.1%, 청미래덩굴 잎은 84.0%의 값을 보였다. 쇠무 릎 줄기의 메탄올 추출물은 Bacillus subtillis에 대해 항균력을 보였으며, 청미래덩굴 잎 추출물은 Bacillus subtillis, Vibrio vulnificus 및 Salmonella enterica에 대하여 항균력이 있었다. 그리고 중금속 이온의 흡착 및 회수실험 결과 동 일한 금속농도에서 Cd(II)에 대한 청미래덩굴의 흡착률보다 Pb(II)에 대한 쇠무릎의 흡착률이 더 높았다. Physicochemical properties of Achyranthes japonica and Smilax china extracts were investigated for the purpose of functionality research on the natural bio-resources. Extraction contents were order of distilled water>methanol>ethanol solvent, the highest free aminoacids were proline from Achyranthes japonica, phosphoserine and glutamic acid from Smilax china, respectively. BI and TAC by spectrophotometric absorbance were order of methanol>ethanol>water in Smilax china leaf extract, but water>methaol>ethanol in Achyranthes japonica leaf extract. EDA was high in ethanol extract from Smilax china leaf and in methanol extract from Smilax china root, and in water extract from Achyranthes japonica. TBA value of Achyranthes japonica leaf and Smilax china leaf-ethanol extracts on olive oil was 82.1% and 84.0%, respectively, for that of an artificial antioxidant BHT. Antimicrobial effect was observed in Achyranthes japonica stem-methanol extract on Bacillus subtillis, in Smilax china leaf-ethanol extract on Bacillus subtillis, Vibrio vulnificus and Salmonella enterica, respectively. And the adsorption of Pb(II) on Achyranthes japonica was higher than that of Cd(II) on Smilax china under the same metal ion concentration.

비수리(Lespedeza cuneata G.Don) 추출물과 담금주의 이화학적 특성비교

정갑섭(Kap-Seop Jeong) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.12

전국의 산야에 자생하는 야생 초본의 하나인 비수리(Lespedeza cuneata G.Don)의 천연물 자원으로서의 유용성에 대한 기초자료를 마련하기 위하여 비수리의 물과 에탄올 추출물의 몇 가지 이화학적 특성과 항산화 활성을 측정하고, 비수리담금주의 결과와 비교하였다. 비수리 추출물의 유리 아미노산은 phosphoethanolamine을 비롯한 22종이 검출되었으며, 백분율 함량은 phosphoethanolamine 20.36>L-proline 18.02>ammonia 14.48>L-aspartic acid 12.96>γ-amino-n-butyric acid(GABA) 10.67 % 등의 순서로 측정되었다. 총 플라보노이드와 총 페놀성 화합물의 함량은 담금주>증류수 추출물>에탄올 추출물의 순서로 비교되었다. 항산화 활성으로서 DPPH(1,1’-diphenyl-2-picrylhydrazyl) 라디칼 소거능에 기준한 전자 공여능은 담금주가 ascorbic acid의 81.4%로 가장 높았으며, 에탄올 추출물>증류수 추출물의 순서로 측정되었다. 철 환원력(ferric reducing antioxidant power)과 ABTS(2,2’-azino-bis(3- ethylbenzothiazoline-6- sulfonic acid) 라디칼 소거능은 담금주>증류수 추출물>에탄올 추출물의 순서로서 추출물 중의 플라보노이드와 페놀성 화합물 함량에 비례하였다. 그리고 아질산염 소거능은 전자 공여능의 순서와 같이 담금주>에탄올 추출물>물 추출물의 순서로 비교되었으며, 담금주의 경우 pH 1.2에서 96.6%로서 물 추출물의 2.6배에 해당되는 높은 소거활성으로 측정되었다. Lespedeza cuneata (LC) is a herbaceous plant that grows throughout Korea. To investigate the physicochemical properties and the antioxidant activities of LC extracts and LC-soaked liquor (s. liquor), extraction with distilled water (DW) and ethanol was conducted and the extracts were compared with s. liquor. A total of 22 free amino acids from LC extract were detected, with the main ones being phosphoethanolamine 20.36>L-proline 18.02>ammonia 14.48>L-aspartic acid 12.96>γ-amino-n-butyric acid 10.67%. The total flavonoid contents (TFC) and total phenolics contents (TPC) were in the order of s. liquor>DW>ethanol extract. The electron donating ability based on DPPH radical scavenging ability was highest for s.liquor, which equivalents 81.4% ascorbic acid in the order of s. liquor>ethanol>DW extract. The orders of ferric reducing antioxidant power and ABTS radical scavenging ability were proportional to the TFC and TPC of extracts, and in the order of s. liquor>ethanol>DW extract. The nitrite scavenging ability of s. liquor was highest among the three extracts (96.6% at pH 1.2), which was 2.6 times greater than that of DW extract.

소리쟁이(Rumex crispus) 뿌리로부터 가용성 고형분의 추출특성

정갑섭 ( Kap Seop Jeong ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.10

In this study, the extraction characteristics of soluble solid from Rumex crispus(Curled dock) was studied from the investigation of the effects of experimental conditions on extraction rate; extraction ratio, composition of extractants, extraction time and pH of extractant, etc. The proximate composition of Rumex crispus was 2.58% crude lipid, 5.59% crude protein, 7.39% crude ash, 6.13% moisture and 78.31% carbohydrate, respectively. Turbidity of extract by distilled water was higher and increased with extraction time and extraction temperature, where as the turbidity didn`t increase by ethanol and methanol in 20 folds of extraction ratio. Turbidity was inversely proportional to the extraction ratio for the three extractants at 25℃ and 1 hour extraction. But turbidity of extract was highest by composition of 50% methanol-water extractant than any other compositions of extractants. Eighteen and fifteen free aminoacids were detected in extracts with distilled water, methanol and ethanol extractant, respectively, and it`s contents were order of glutamic acid>proline>aminobutyric acid>alanine. The extraction rate of soluble solid from Rumex crispus was order of distilled water>methanol>ethanol within experimental extraction ratio. In extraction with distilled water, the contents of soluble solid was inversely proportional to the pH of extractant.

산화아연 현탁액에 의한 타르색소의 광분해

정갑섭 ( Kap Seop Jeong ) 한국환경과학회 2006 한국환경과학회지 Vol.15 No.12

솔잎 추출물의 기능적 특성과 대두유 산화억제 효과에 관한 연구

정갑섭 ( Kap Seop Jeong ) 한국환경과학회 2008 한국환경과학회지 Vol.17 No.10

연구논문 : 부산 일부지역 토양과 채소의 중금속 함량 연구

정갑섭 ( Kap Seop Jeong ) 한국환경과학회 2007 한국환경과학회지 Vol.16 No.6