• 한국식품위생안전성학회지
• /
• 제19권1호
• /
• pp.12-18
• /
• 2004

1. 닭고기에서 4종의 플루오로퀴놀론계 합성항균제(ofloxacin, norfloxacin, ciprofloxacin, enrofloxacin)를 액상추출법으로 추출하여 형광검출기와 HPLC를 이용하여 동시 정량 분석하는 방법을 확립하였으며 분석조건으로서 컬럼은 Symmetry Cl8(250${\times}$4.6 mm id, 5 $\mu\textrm{m}$), 이동상은 0.4% triethylamine 및 0.4% phospholic acid 수용액, methanol 및 acetonitrile 혼합용액(800: 100: 100, v/v/v)을 사용하였으며, 형광검출기는 여기파장 278 nm, 측정파장 456 nm으로 그리고 유속은 1.0 $m\ell$/min., 주입량은 50 ${\mu}\ell$로 하였다. 확립된 분석조건으로 측정한 ofloxacin, norfloxacin, ciprofloxacin, enrofloxacin 표준품의 표준곡선식에서 모두 상관계수 0.999이상의 양호한 직선성을 보였으며, 첨가한 닭고기의 크로마토그람에서도 각각의 물질별 분리시간대에 방해 피크 없이 양호한 분리도를 나타내었다. 0.05∼0.2 $\mu\textrm{g}$/g 첨가한 시료에서 평균 회수율은 ofloxacin 92.0∼95.4%, norflokacin 84.2∼87.3%, ciprofloxacin 78.3∼82.2%, enrofloxacin 91.3∼95.3%이었으며 변이계수(CV)는 2.7∼9.4%이었다. 4종의 동시분석법의 검출한계 및 정량한계는 각각 ofloxacin 23.5 ppb, 35.3 ppb, norfloxacin 3.4 ppb, 5.1 ppb, ciprofloxacin 3.0 ppb, 4.5 ppb, enrofloxacin 2.5 ppb, 3.8 ppb수준이었다. 2. 인천 지역에서 도축한 닭고기 총 1,523수를 EEC-4-plate법으로 검사한 결과 양성반응을 보인 닭고기는 15수(육계 10, 토종닭 5)였으며, HPLC를 이용한 정밀검사결과 육계 5수에서 ciprofloxacin이 불검출 ∼0.04 ppm, enrofloxacin이 0.01∼0.69 ppm수준으로 검출되었으며, 토종닭 5수에서는 ciprofloxacin이 0.02∼0.12 ppm, enrofloxacin이 0.36∼6.79 ppm수준으로 검출되었다.

• 한국산업보건학회지
• /
• 제6권1호
• /
• pp.77-87
• /
• 1996

다량의 연을 사용하는 제조업 중에서 7개의 축전지 제조업, 3개의 폐전지 제련공장, 그리고 2개의 연분 및 광명단을 제조 또는 사용하는 사업장 총 11개 대상 사업장에서 정기 보건관리시 혈중 Zinc Protoporphyrin 농도를 고려하여 생산직 남자 근로자 234명을 선정, 혈액에서 혈중연, 혈중 ZPP, 혈색소 등을 측정하고 소변에서 ${\delta}$-ALA 배설량을 비색법과 HPLC법으로 분석하여 그 차이점을 확인하고 연노출 지표들과의 관련성을 조사하여 연중독 판정기준의 새로운 기준을 마련하기 위하여 본 연구를 시도한 바 결과는 다음과 같다. 1. 비색법과 HPLC법에 의한 요중 ${\delta}$-ALA 배설량은 높은 상관성이 있으나 비색법이 HPLC법 보다 2 mg/L 정도 높게 측정되었다(r = 0.989, 회귀식 ; HALA = - 0.8194 + 0.8110 ${\times}$ CALA) 2. 요중 ${\delta}$-ALA 배설량은 두 방법 모두 혈중연 및 혈중 ZPP 농도와의 상관계수가 각각 0.46, 0.37 이상이었으며, ${\delta}$-ALA 배설량을 대수변환하였을 때는 상관계수가 0.63, 0.57로 높아졌으며 통계적으로도 유의하였다. 3. 혈중 ZPP를 독립변수로, 비색법과 HPLC법에 의한 요중 ${\delta}$-ALA 배설량을 종속변수로 한 단순회귀방정식은 다음과 같다. CALA = 2.0421 + 0.0341 ${\times}$ ZPP $R^2=0.1385$ p = 0.0001 HALA = 0.8006 + 0.0280 ZPP $R^2=0.1389$ p = 0.001 4. 혈중연을 독립변수로, 비색법과 HPLC법에 의한 요중 ${\delta}$-ALA 배설량을 종속변수로 한 단순 회귀 방정식은 다음과 같다. CALA = - 0.4134 + 0.1545 ${\times}$ PbB $R^2=0.2085$ p = 0.0001 HALA = - 1.2893 + 0.1287 ${\times}$ PbB $R^2=0.2154$ p = 0.0001 5. 비색법과 HPLC법에 의한 요중 ${\delta}$-ALA 배설량을 대수변환하였을 때 혈중연 및 혈중 ZPP를 독립변수로 하는 회귀식은 다음과 같다. logHALA = 0.3078 + 0.0060 ${\times}$ ZPP $R^2=0.3329$ p = 0.0001 logCALA = 1.0189 + 0.0044 ${\times}$ ZPP $R^2=0.3290$ p = 0.0001 logHALA = - 0.0221 + 0.0246 ${\times}$ PbB $R^2=0.4046$ p = 0.0001 logCALA = 0.7662 + 0.0184 ${\times}$ PbB $R^2=0.4108$ p = 0.0001 6. 요중 ${\delta}$-ALA 배설량에 대한 연중독 주의한계의 cut-off point를 5 mg/L로 하였을 경우 혈중연과 혈중 ZPP의 주의한계에 대한 비색법의 누적 빈도가 HPLC법 보다 높았으며, 따라서 HPLC법의 cut-off point를 3 mg/L로 하였을 때 비색법과 좋은 일치도를 보였고 연노출지표들과 량-반응 관계를 나타내었다. 이상의 결과로 연중독 판정기준의 주의한계와 선별한계의 개정이 필요하나 남자 근로자들만의 연구이므로 여자 근로자에 관한 연구가 추가로 필요하다고 생각된다.

• 한국연초학회지
• /
• 제12권1호
• /
• pp.29-38
• /
• 1990

Until relatively recently plant scientists have made little use of immunological techniques. Now, however, more and more researchers are discovering the powder of these techniques for the screening of immunomodulators and for the detection, quantitative determination and localization of compounds in plant materials. Especially, the recent developments in the fields of plant biotechnology and plant genetic engineering make it even more important for forkers in the plant sciences to become acquainted with the more sophisticated methods. The possible methods include onestep purification of antigens, visualization in situ by immunocytochemis try and on polyacrylam ids gel s by ni trocellulose Western blotting and quantification by various immunoassay. Among them, in this reviews, the quantitative determination methods are to be reviewed. There are several kinds of methods for the quantitative determination of plant constituents such as colorimetry, TLC, GLC, DCC, UV derivatization, densitometry and HPLC. When the complexity of plant constituents is considered. densitometry and HPLC have many advantages in sensitivity and separation ability. After a 11 some advarltages of two methods meritiorled above, all of these methods have many disadvantages and inconveniences. Previous purification for the application of all these methods make them less sensitive and more tedious. Immunoassay can solve these problems in part. But immunoassay also has some limitations. Specificity of immunoassay, contrary, can be considered to be disadvantages. Including this the advantages and disadvantages of immunoassay are to be discussed.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권7호
• /
• pp.1031-1035
• /
• 2002

This study was carried out to obtain conjugated linoleic acid (CLA) producing lactic acid bacteria for further study on the enzymes related to the production of CLA which has gained considerable attention and on the development as a probiotic culture. Total 34 lactic acid bacteria were isolated from 19 feces samples of healthy babies. CLA forming ability was measured spectrophotometrically by the modification of linoleate 12-cis, 11-trans-isomerase activity measuring method, and CLA of the cultures were extracted, methylated, and examined by HPLC analysis. CLA methyl ester of only one culture showing the highest value of CLA forming ability could be detected by HPLC analysis. The culture was found to be Gram positive, rods and catalase negative. It grows at $45^{\circ}C$ but not at $15^{\circ}C$, and was identified to be Lactobacillus fermentum on the basis of the biochemical characteristics and the utilization of substrates. These results provide an efficient experimental method to screen CLA producing lactic acid bacteria.

• 한국약용작물학회:학술대회논문집
• /
• 한국약용작물학회 2009년도 심포지엄 및 춘계학술발표회
• /
• pp.273-274
• /
• 2009

• Natural Product Sciences
• /
• 제20권2호
• /
• pp.102-106
• /
• 2014

Gumiganghwal-tang (GMT) is a traditional herbal prescription used for treatment of the common cold, pain, and inflammatory diseases. Variations in the amounts of bioactive components of GMT and GMT fermented with 10 Lactobacillus strains were investigated by high-performance liquid chromatography coupled with diode array detection (HPLC-DAD). Simultaneous qualitative and quantitative analyses of eleven bioactive compounds (prim-O-glucosylcimifugin, liquiritin, cimifugin, baicalin, liquiritigenin, wogonoside, baicalein, wogonin, butylphthalide, imperatorin, and isoimperatorin) were performed, with comparison of their retention times (tR) and UV spectra with those of standard compounds. The amounts of baicalin (8.71 mg/g), liquiritigenin (5.28 mg/g) and butylphthalide (5.10 mg/g) were the major compounds in GMT. We found that L. fermentum KFRI 145 fermented wogonoside and baicalin to their aglycones, wogonin and baicalein, respectively. These results indicated that L. fermentum KFRI 145 has potential as a functional starter culture for manufacturing fermented GMT.

• 약학회지
• /
• 제45권6호
• /
• pp.656-663
• /
• 2001

The quality of an intravenous immunoglobulin preparation (IVIG) is reflected by the degree of nonspecific activation of complements, the so-called anticomplementary activity (ACA). ACA of aggregates in IVIG was investigated using method by the European Pharmacopoeia and Clq-coated microtiter enzyme-linked immunosorbent assay (ELISA). Both the EP method and the ELISA method showed a dose response curve with the amount of complements bound increasing with the percentage content of aggregates in immunoglobulin standard. The correlation between the two tests was good (r=0.96, r=0.99). However, the correlation was not found when the ACA (EP method) of IVIG product was compared with its aggregate percentage. These results emphasize that the method of aggregate formation affects ACA and that estimation of the percentage distribution of aggregates by HPLC may not reflect ACA. In analysing WIG product for Clq binding activity test with the ELISA, the result by using Protein A-HRP correlated with aggregate percentage (r=0.84). But the correlation decreased (r=0.48) when the result used Protein A-AP(having poorer sensitivity than HRP) was compared with aggregate percentage. As a result, some variation between the two methods, due to differences in assay principles, is to be expected. However, ELISA technique has the advantage in that it is easier to perform, more precise and less subject to reagent variability, and is the more suitable screening method than HPLC analysis.

• 한국균학회소식:학술대회논문집
• /
• 한국균학회 2016년도 춘계학술대회 및 임시총회
• /
• pp.35-35
• /
• 2016

A mycotoxin is a toxic secondary metabolite produced by organisms of the fungus kingdom, commonly known as molds and has been widely contaminated in agricultural products such as grains and cereals. Many methods including high performance liquid chromatography (HPLC) and gas chromatography (GC) have already been proposed and reviewed for mycotoxins. These methods are either expensive or time-consuming due to the complication of sample preparation and pre-concentration before determination. In addition, both methods are unsuitable for the routine screening of large sample numbers. A biosensor is a fictive analytical device that combines a biological component with a physicochemical detector for the detection of an analyte. Biosensors represent a rapidly expanding field, at the present time, with an estimated 60% annual growth rate; the major impetus coming from the health-care industry but with some pressure from other areas, such as food safety and environmental monitoring. Antibodies and aptamers are bioreceptors which have been used in the development of biosensors. There are many kinds of antibodies and aptamers specific to mycotoxin, and antibody (or aptamer)-based biosensors have been successfully developed for the detection of mycotoxin. The biosensors permit the rapid, sensitive, simple, and on-site detection of a range of mycotoxins and can be an alternative method to traditional methods such as HPLC and GC. This presentation provides the development trends of biosensors to mycotoxins and their application to food and agricultural products.

• Applied Biological Chemistry
• /
• 제38권6호
• /
• pp.577-580
• /
• 1995

다제내성 Staphylococcus aureus균주에 강력한 항균활성을 나타내는 CNU30122 균주를 선발하였다. 선발된 CNU30122균주의 배양액 추출물로부터 Diaion HP-20 column chromatograpy, ethylacetate 추출, silica gel 및 Sephadex LH-20 column chromatography, HPLC 등에 의해 백색분말의 순수한 화합물을 분리정제 하였다. 본 물질의 구조분석을 위하여 $^1H$ 및 $^{13}C\;NMR,\;DEPT,\;^1H-^1H\;COSY,\;^1H-^{13}C\;COSY$ 및 HMBC spectrum을 분석한 결과 본 물질은 분자량 516, 분자식 $C_{31}H_{48}O_6$의 tetracyclic triterpenoic acid 계열인 fusidic acid로 동정 되었다. 본화합물은 streptomycin, pecicillin, kanamycin, tetracycline 등의 약제에 내성균주인 Staphylococcus aureus R209 균주에 선택적으로 강한 항균활성을 나타내었다.

• KSBB Journal
• /
• 제23권5호
• /
• pp.398-402
• /
• 2008

Cyanobacteria havebeen identified as one of the most promising group producing novel biochemically active natural products. Cyanobacteria are a very old group of prokaryotic organisms that produce very diverse secondary metabolites, especially non-ribosomal peptide and polyketide structures. Though many useful natural products have been identified in cyanobacterial biomass, cyanobacteria produce also extracellular proteins related with NRPS/PKS. Detection of unknown secondary metabolites in medium was carried in the present study by a screening of 98 cyanobacterial strains. A degenerated PCR technique as molecular approaches was used for general screening of NRPS/PKS gene in cyanobacteria. A putative PKS gene was detected by DKF/DKR primer in 38 strains (38.8%) and PCR amplicons resulted from a presence of NRPS gene were showed by MTF2/MTR2 primer in 30 strains (30.6%) and by A3/A7 primer in 26 strains (26.5%). HPLC analysis for a detection of natural products was performed in extracts from medium in which cyanobacteria containing putative PKS or NRPS were cultivated. CBT57, CBT62, CBT590 and CBT632 strains were screened for a production of extracellular natural products. 5 pure substances were detected from medium of these cyanobacteria.