• 한국식품위생안전성학회지
• /
• 제8권3호
• /
• pp.147-150
• /
• 1993

Oxolinic Acid는 양식어류에 흠히 쓰이고 있는 항균성물질이나 국내에서는 잔류허용 기준과 공정분석법이 설정되어 있지 않은 실정이다. 해외의 경우 이 물질을 분석할 수 있는 여러 방법이 고안되어 소개되어 있으나 검출감도가 낮거나 분석 방법이 복잡하여 단시간내에 다량의 시료를 처리하는데는 어려움이 있다. 본 연구에서는 보리새우 중에 잔류하는 Oxolinic Acid를 ethylacetate로 용출한 다음 이를 증발시키고 여기에 묽은 Oxolinic Acid와 hexane을 가하여 방해물질을 제거하면서 재추출하여 시료를 정제하였다. 이 시료를 HPLC의 자외선 검출기로 정량하였던 바 회수율은 79~91%, 검출한계는 50ppb였으며 재현성이 있는 것으로 나타나 잔류검사법으로 적합하다고 사료되어 보고한다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제23권8호
• /
• pp.1105-1111
• /
• 2010

In order to determine the potential for reduction of nitrite levels and ripening period with heat treatment, the effects of ripening period (1-13 days), nitrite level (45-195 ppm), and heat treatment (30-$90^{\circ}C$) on lipolysis, peroxide, TBA, proteolysis, and residual nitrite values of sucuk were investigated using response surface methodology. The ripening period significantly (p<0.01) increased lipolysis, peroxide, TBA, and proteolysis values and decreased residual nitrite values. The effects of additional nitrite levels were found to significantly affect peroxide and residual nitrite values. Significant amounts of the additional nitrite levels were reduced during processing and on the first day of ripening periods.

• 한국관광식음료학회지:관광식음료경영연구
• /
• 제12권1호
• /
• pp.5-24
• /
• 2001

This study was focused on the sanitary analysis of hazard factors and the establishment of critical control points on steak-set menu In hotel by the documents and microbiological investigation. The hazard factors of shrimp cocktail were microbial contamination, residual pesticides, unsuitable healing and cross contamination. The hazard factors of potato soap were residual pesticides, microorganisms contamination, unsuitable heating and solanine in potato. The hazard factors of simple salad were microorganisms contamination, unsuitable heating and cross contamination by inappropriate package. The hazard factors of steal were residual antimicrobial drugs, microorganisms contamination, unsuitable heating and cross contamination. The critical control points of shrimp cocktail were temperature control , number of washing and center temperature control of heating step. The critical control points of potato soup were stock temperature control , number of washing and center temperature control of Heating step. The critical control points of simple salad were number of washing and dryness of utensil. The critical control points of steak were stock temperature control , number of washing, center temperature and time control of heating step.

• 한국식품조리과학회지
• /
• 제15권4호
• /
• pp.382-387
• /
• 1999

This study was conducted to investigate the changes of mineral contents in radish leaves, soybean sprout and chwi namul by cooking method(boiling, steaming, sauting) and cooking time(1, 3, 5 min.). The residual rate of minerals(such as Calcium, Sodium, Potassium, Iron and Magnesium) in radish leaves, soybean sprout and chwi namul by 1 minute sauting was the range of 83.2 to 99.1%. It was shown that sauting was desirable method for all three vegetables. The residual rate by the cooking method was sauting, steaming, boiling, in that order, but boiling in radish leaves and chwi namul were more desirable method than steaming for Calcium use. At the cooking method and cooking time, Potassium content in soybean sprout was reduced remarkably in 5 minutes boiling. Boiling of radish leaves and soybean sprout showed that Sodium was reduced remarkably after 5 minutes of boiling, 54.4% for radish leaves and 19.9% for soybean sprout, respectively.

• 한국식품과학회지
• /
• 제39권3호
• /
• pp.237-245
• /
• 2007

서울, 경기, 인천, 강원, 충북지역에 유통되고 있는 농산물 중 다소비 농산물 및 잔류농약 부적합 이력이 높은 참나물, 취나물, 쪽파 등 23종(488건)의 농산물을 대상으로, GC/MS, GC-NPD 및 LC/MS/MS를 사용하여 동시 다성분 검사대상 농약 231종 및 methamidophos, acephate, pymetrozine 등 234종의 농약에 대해서 모니터링 검사를 실시하였다. 488건의 농산물 중 92건(18.9%)의 시료에서 농약이 검출되었으며 그중 9건(1.9%)은 국내 농약잔류 허용기준을 초과하였으며, 고춧잎과 쪽파는 50% 이상의 검출율을 나타내었다. 특히 쪽파에서는 30건의 시료 중 16건에서 농약이 검출되어 53.3%의 검출율을 나타내었으며 이 중 4건에서 농약잔류허용기준 이상의 농약이 검출되었다. 그 외에 숙갓, 취나물, 신선초, 깻잎, 적겨자 등에서 20% 이상의 농약 검출율을 나타내었으나 검출량은 대부분 농약 잔류허용기준 이하였다. 총 234종의 농약 중 42종의 농약이 1회 이상 검출되었으며, 그 중 21종의 농약은 2회 이상 검출되었다. 잔류허용기준을 초과한 농약은 iprodione, fludioxonil, cypermethrin, ethoprophos, flutolanil, lufenuron 등 6종이었으며, 초과 대상농산물은 쪽파 4건 및 취나물, 신선초, 고춧잎, 쑥갓, 팥 각 1건 등 9건이었다. 전체 검사대상 시료의 81.1%인 394건에서는 농약이 검출되지 않았고, 농약이 검출된 92건 중 83건이 농약 잔류허용기준 미만으로 검출되는 등 98.1%가 적합한 수준이었다.

• 대한약학회:학술대회논문집
• /
• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
• /
• pp.212.2-212.2
• /
• 2002

• Food Science and Biotechnology
• /
• 제14권2호
• /
• pp.185-189
• /
• 2005

The effect of NaCl solution concentration (from 0 to 3 M) on the extraction of pectinesterase (PE) from jalapeno chili pepper (Capsicum annuum) was studied by determining its solubilization degree from the chili tissue. All concentrations of the salt favored the solubilization of PE in jalapeno chili pepper, compared to that in water. Maximum enzyme activity was obtained with NaCl 2.0 M. The effect of temperature on the PE activity of jalapeno chili pepper in the extracts was also studied. The PE residual activity of jalapeno pepper was 75% after 60 min of incubation at $55^{\circ}C$ and 10% at $75^{\circ}C$. At $85-95^{\circ}C$, PE residual activity was 5% after 5 min of incubation.

• Environmental Engineering Research
• /
• 제13권3호
• /
• pp.112-118
• /
• 2008

Residual solid in excess sludge treated by hydrothermal reaction was investigated as raw material for its recycling. Treated excess sludge and residual solid were also focused on their content change during hydrothermal reaction. Two kinds of excess sludge, obtained from a local food factory and a municipal wastewater treatment process, were tested under various conditions. Following hydrothermal reaction, depending on the reaction conditions, biodegradable substrates in treated excess sludge appeared to increase. The separated residual solid was a composite composed of organic and inorganic materials. The proportion of carbon varied from 34.0 to 41.6% depending on reaction conditions. Although 1.89% of hazardous materials were detected, SiO2 (Quartz) was a predominant constituent of the residual solid. X-ray diffraction (XRD) experiments revealed that the residual solid was of a partially amorphous state, suggesting that the residual solids could be easily converted to stable and non harmful substances through a stabilization process. Thus, this technology could be successfully used to control excess sludge and its reuse.

• Geomechanics and Engineering
• /
• 제7권6호
• /
• pp.633-647
• /
• 2014

Biopolymers, polymers produced by living organisms, are used in various fields (e.g., medical, food, cosmetic, medicine) due to their beneficial properties. Recently, biopolymers have been used for control of soil erosion, stabilization of aggregate, and to enhance drilling. However, the inter-particle behavior of such polymers on soil behavior are poorly understood. In this study, an artificial biopolymer (${\beta}$-1,3/1,6-glucan) was used as an engineered soil additive for Korean residual soil (i.e., hwangtoh). The geotechnical behavior of the Korean residual soil, after treatment with ${\beta}$-1,3/1,6-glucan, were measured through a series of laboratory approaches and then analyzed. As the biopolymer content in soil increased, so did its compactibility, Atterberg limits, plasticity index, swelling index, and shear modulus. However, the treatment had no effect on the compressional stiffness of the residual soil, and the polymer induced bio-clogging of the soil's pore spaces while resulting in a decrease in hydraulic conductivity.

• 한국식품위생안전성학회지
• /
• 제5권3호
• /
• pp.159-164
• /
• 1990

To detect and quantitation residual antibiotics and antibacterial agents in meats, we performed a biological assay employing the three microorganisms Bacillus subtilis ATCC 6633, Micrococcus luteus ATCC 9341, and Bacillus cereus var. mycoides ATCC 11778 for the screening purpose and developed a Gas Chromatography-mass Spectrometry(GC/MS) analysis for the confirmation and quantiation. In the biological assay (paper disk method), three test solution are used depending on the character of the residual antibiotics and antibacterial agents, follow by a simple clean up procedure which includes homogenization with Mcilvaine buffer, defatting with includes homogenization with Mcilvaine buffer, defatting with hexane, extraction with chloroform, clean-up by Sep-Pak $C_{18}$ and Bakerbond SPE carboxylic acid column. The chloroform layer is used for the analysis of sulfa agents. macrolides antibiotics and antibacterial agents, Adsorbed materials in the Sep-Pak $C_{18}$ were also employed for th analysis of penicillins and tetracyclines. Effluents from the Sep-Pak $C_{18}$ were cleaned-up one more by Bakerbond 10 SPE COOH column and employed for the analysis of aminoglycosides. In the instrumental analysis by using the GC/MSD, residual antibiotics and antibacterial agent were quantitated by selected ion monitoring (SIM) mode after derivatization. A simultaneous analysis of six residual antibiotic and antibacterial agent such as oxytetracycline, penicillin, ampicillin, choliraphenicol and thiamphenicol was developed with simple cleanup procedures revealing good recovery and reproducibility. Also, simultaneous detection of macrolides antibiotics such as erythromycin, spiramycin, and oleandomycin was developed after acid hydrolysis due to their large molecular structures. Because of the high reproducibility and selectivity of these two methods, it is very desirable that the combination of the two methods be used in the bioassay for the screening of residual antibiotics and antibacterial agent and that GC/MSD analysis be used for the confirmation and quantitation.