• Membrane and Water Treatment
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• 제11권4호
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• pp.257-274
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• 2020

There are many previous review articles are available to summarize either the characterization methods of effluent organic matter (EfOM) or the individual control treatment options. However, there has been no attempt made to compare in parallel the physicochemical treatment options that target the removal of EfOM from biological treatments. This review deals with the recent progress on the characterization of EfOM and the novel technologies developed for EfOM treatment. Based on the publications after 2010, the advantages and the limitations of several popularly used analytical tools are discussed for EfOM characterization, which include UV-visible and fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), size exclusion chromatography (SEC), and Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS). It is a recent trend to combine an SEC system with various types of detectors, because it can successfully track the chemical/functional composition of EfOM, which varies across a continuum of different molecular sizes. FT-ICR-MS is the most powerful tool to detect EfOM at molecular levels. However, it is noted that this method has rarely been utilized to understand the changes of EfOM in pre-treatment or post-treatment systems. Although membrane filtration is still the preferred method to treat EfOM before its discharge due to its high separation selectivity, the minimum requirements for additional chemicals, the ease of scaling up, and the continuous operation, recent advances in ion exchange and advanced oxidation processes are greatly noteworthy. Recent progress in the non-membrane technologies, which are based on novel materials, are expected to enhance the removal efficiency of EfOM and even make it feasible to selectively remove undesirable fractions/compounds from bulk EfOM.

• 한국식품과학회지
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• 제5권3호
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• pp.178-182
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• 1973

오미자(五味子) 열매의 일반성분(一般成分)을 살폈고, 유기산(有機酸)을 정량(定量)하였으며, 색소(色素)를 분획(分劃)하여 일부(一部) 동정(同定)하였다. 1. 숙성(熟成)한 오미자(五味子)에는 수분(水分) 84.2%, 지방(脂肪) 0.9%, 환원당(還元糖) 10.9%, 그리고 단백질(蛋白質)이 1.1% 함유(含有)되었으며, Total anthocyanin의 함량(含量)은 168mg%이다. 2. 오미자(五味子) 중(中) 확인(確認)된 유기산(有機酸)의 함량(含量)은 5.1%로서 citric acid 3.5%, malic acid 1.4%, 그리고 succinic acid 0.2%로 조성(組成)되었다. 3. 오미자(五味子)의 색소(色素)를 polyvinylpyrrolidone column에 통과(通過)시켜서 3개(個)의 획분(劃分)을 분리(分離)하였고, 그 중 80%를 차지하는 anthocyanin을 peonodin 3-glucoside로 잠정적으로 동정(同定)하였다.

• 한국물환경학회지
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• 제21권2호
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• pp.141-146
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• 2005

The aim of this study is to quantify and characterize the dissolved organic carbon (DOC) from paddy fields and crop fields in Tottori, Japan. DOC and ultraviolet (UV) absorption were measured in the filtrated water of each sample. The DOC concentration and the SUVA (specific UV absorption) of biodegradation analysis samples were determined around 50 days after their incubation. In the Fukui paddy fields, DOC concentration varied seasonally from 1.1 to $10.1mg\;Cl^{-1}$, becoming higher during heavy runoffs in April, a non-agriculture period. Variations in DOC concentration did not always correspond to rainfall, though. The Obadake paddy fields showed a DOC concentration pattern similar to that of the Fukui paddy fields. The daily DOC discharge per area in the Fukui (up), Fukui (down), Obadake (south) and Obadake (north) paddy fields influent from paddy fields were 0.02, 0.0161, 0.0135 and $0.0027kg\;a^{-1}day^{-1}$, respectively. These differences resulted from differences in agricultural types and customs of farmers according to paddy fields and other kinds of fields. Also, the SUVAs [which are indirect means to evaluate humic substances (hydrophobic fractions)] of the studied influent waters from paddy fields were generally lower than those of the influent waters from crop fields. Nonbiodegradable DOC accounted for 50.2 - 98% and 46.8 - 85.5% of the total DOC in the paddy fields and in the crop fields, respectively.

• 한국환경농학회지
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• 제19권1호
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• pp.6-12
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• 2000

토양 유기물함량이 다른 감귤원 토양 19개 토양통에서 30개의 토양시료를 채취하여 8개 농약에 대한 흡착특성을 분석하였다. 흡착형태 alachlor와 chlorpyrifos는 C형, diuronn과 diniconazole은 L형, metribuzin, metolachlor 및 linuron은 유기탄소 함량이 증가함에 따라 S, C 및 L형이 복합적으로 나타났으며, chlorothalonil은 유기탄소 함량에 따라 C, S, L 및 H형이 모두 나타났다. metribuzin, metolachlor 및 alachlor의 분배계수 값은 $10\;L\;kg^{-1}$ 이하로서 유기탄소 함량이 증가함에 따라 직선적인 형태로 높아졌다. linuron, diuron 및 chlorothalonil의 분배계수 값은 60, 200 및 $400\;L\;kg^{-1}$ 이하에서 지수 형태로 증가했으며, diniconazole과 chlorpyrifos는 로그 형태로 증가하였다. Freundlich식의 Kf 값도 유기탄소 함량이 많아짐에 따라 분배계수 값과 거의 유사한 형태로 증가되었으나 분배계수 값에 비해 직선성이 컸다.

• 한국식품과학회지
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• 제35권1호
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• pp.115-120
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• 2003

한국산 배의 부가가치 제고를 위한 가공제품 다양화 기술을 개발할 목적으로 저장기간에 따른 polyphenol 화합물의 함량, 유리당, 유기산 등 기능적 특성을 나타내는 성분 변화를 조사하고 polyphenol 화합물의 항산화 효과를 조사하였다. 배의 과피, 과육 및 과심 부분의 polyphenol 함량의 변화는 저장 기간동안 차차 증가하였으며 과심부분의 함량이 25.7%로 증가하였다. 배의 저장기간의 pH 변화는 저장기간이 길수록 감소하였으며 유리당은 fructose, glucose 및 sucrose의 3종류의 당이 검출되었고 저장기간이 증가할수록 그 함량은 증가하였다. 배의 휘발성 유기산은 citric acid, malic acid, succinic acid 및 fumaric acid의 4 종류가 검출되었고 과육에는 succinic acid가 제일 많았으며 저장 5개월 후로부터 차차 감소하였다. 또한 면실유, 아마인유 및 어유에 대한 배의 polyphenol 화합물의 항산화 효과는 대조군에 비하여 모든 실험군에서 항산화 효과가 높았다.

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2011년도 30주년 정기총회 및 국제심포지엄
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• pp.177-187
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• 2011

This study was conducted to determine some physical and chemical properties of the soil and their relationship to spectroscopic-based (visible range) analytical methods while evaluating soil organic matter fractions and soil quality in degraded and non-degraded soils in a wide range of environments. Soil samples were collected from the different landscape positions of cultivated and noncultivated soils, and the latter from the same landscape positions but with different vegetation, at Songco, Lantapan, Bukidnon. The physical and chemical properties of the soils were determined at the SPAL, CMU, Musuan, Bukidnon while the metagenomic properties were determined at the Laboratory of the University of Missourri, Missourri, USA. Bulk density and air dry soil strength values of the soils from the cultivated areas were generally higher than those of the uncultivated areas. Also, soils at the summit generally had lower bulk density and soil strength values than the other landscape positions. Moreover, soils planted to camote (Ipomoea batatas) had higher bulk density and soil strength values compared to soils grown to pepper under the trees. Exchangeable calcium (Ca), magnesium (Mg), and potassium (K) and cation exchange capacity (CEC) of the soils were generally higher in uncultivated areas than those of the cultivated areas. A similar trend was observed for the potassium permanganate ($KMnO_4$)-oxidizable organic C contents determined by spectroscopic method and the total C contents determined by the Walkley-Black method. The $KMnO_4$-oxidizable organic C contents determined by spectroscopic method and the total C contents determined by the Walkley-Black method were closely related ($r=0.631^{**}$). Hence, the former method shows promise in assessing soil quality as it is a rapid test, relatively low cost and can be distributed as a field kit either with a portable spectrometer or with a color chart.

• Applied Biological Chemistry
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• 제18권4호
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• pp.194-202
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• 1975

이 연구(硏究)는 도시유기폐물(都市有機廢物)을 이용(利用)한 유기질비료(有機質肥料)로서 활성오니(活性汚泥) 및 진개퇴비(塵芥堆肥)를 킬레이트화 물질로서 利用(利用)하기 위(爲)해서 이들 물질(物質)의 특성(特性)을 조사(調査)하였다. 철(鐵)킬레이트화에 관여(關與)하는 수용성물질(水溶性物質)을 분자체 분획법(分劃法)으로 분리(分離)하여 자외선(紫外線)및 적외선분광(赤外線分光) 스펙트럼에 의해서 그 구조(構造)를 조사(調査)하였고 이들 킬레이트의 안정도상수(安定度常數)를 이온교환평형법(交換平衡法)으로 측정(測定)하여 이들을 킬레이트 물질로 사용(使用)하했을때 그 안정성(安定性)을 검사(檢討)하였다. 진개퇴비(塵芥堆肥)에서 추출(抽出)된 유기물질(有機物質)은 Sephadex G-25에 의(依)해 4개분획(個分劃)으로 분리(分離)되었고 이중 철(鐵)과 킬레이트를 이루고 있던 분획(分劃)은 분자량(分子量)이 $5000{\sim}10,000$ 사이에 있었고 Polyphenol구조(構造)의 산소군(酸素群)이 킬레이트화(化)에 관여(關與)하고 있었다. 활성오니중(活性汚泥中) 가용성(可溶性) 물질(物質)은 Sephadex G-25에 의(依)해 6개(個)의 분획(分劃)으로 분리(分離)되었고 이중 킬레이트를 이루고 있던 분획(分劃)은 $5000{\sim}10,000$ 또는 5000에 약간 미달(未達)하는 분자량(分子量)을 가지고 있고 Polypeptide의 amide기(基)가 킬레이트화에 관여(關與)하였다. 이들의 안정도상수(安定度常數)도 합성(合成)킬레이트 물질의 안정도상수(安定度常數)와 큰 차이(差異)가 없을 정도(程度)로 안정(安定)하였다.

• Natural Product Sciences
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• 제10권2호
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• pp.69-73
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• 2004

Continuation of a phytochemical study of Cichorium intybus L. (Astraceae) growing in Egypt, resulted in the isolation and identification of a new sesquiterpene lactone 3,4-dihydrolactucin, in addition to the eight known compounds; kaempferol, isoscutellarin, cichoriin, umbelliferone, lupeol, lupeol acetate, ${\beta}-sitosterol$, and ${\beta}-sitosterol-3-O-glucoside$. Chemical structures of the isolated compounds were assigned based on different physical, chemical, and spectroscopic techniques including IR, UV, MS, 1D- and 2D-NMR spectra. Furthermore, the antimicrobial, and spasmogenic activities of some fractions and isolates were also assessed.

• 한국약용작물학회지
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• 제6권2호
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• pp.126-130
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• 1998

Spraque-Dawley계 웅성흰쥐에 계통분획한 소엽의 각 분획물을 경구투여하고 혈청 Ethanol농도와 간의 ADH활성에 미치는 효과를 검색 추적한 결과 알코올대사를 촉진시키는 성분은 주로 에탄올가용부에, 억제시키는 성분은 에탄올불용부에 주로 존재함을 추정할 수 있었고 현재 활성성분을 분리중에 있다.

• 한국환경과학회지
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• 제13권8호
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• pp.739-746
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• 2004

Concentrations of PCBs in the sediment of the Kumho River was determined. Samples were collected at 23 locations along the river. Total PCB levels ranged from 2.7 to 87.6 ng/g dry weight. The site near the Keomdan factory district had the highest concentrations. The levels of PCB congeners significantly correlated with the total organic carbons in the sediment. The major fractions of PCBs were congeners containing 4, 5, or 6 chlorine atoms per biphenyl molecule.