• Title/Summary/Keyword: aqueous chlorine dioxide

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Effect of Aqueous Chlorine Dioxide Treatment on the Decomposition of Pesticide Residues (이산화염소수 처리에 의한 잔류농약 분해 효과)

  • Kim, Kyu-Ri;Song, Kyung-Bin
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.38 no.5
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    • pp.601-604
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    • 2009
  • This study was conducted to examine the effect of aqueous chlorine dioxide treatment as a washing method on removal of pesticide residues. Three pesticides of chlorpyrifos, diazinon, and metalaxyl, which are commonly used in vegetable crops, were treated with 10, 50, and 100 ppm of aqueous chlorine dioxide and decomposition of the pesticides was determined using gas chromatography. Three pesticides used in this study were decomposed by aqueous chlorine dioxide treatment and removal rate was proportional to treatment time as well as concentration of aqueous chlorine dioxide. In particular, 100 ppm of aqueous chlorine dioxide treatment decreased the pesticides efficiently. In addition, lettuce was treated by dipping in distilled water and 100 ppm aqueous chlorine dioxide, respectively, and was compared regarding removal efficiency of the pesticides. The results revealed that washing with 100 ppm aqueous chlorine dioxide for 10 min was the most effective for removing the pesticides. These results suggest that aqueous chlorine dioxide can be used as a washing method of fresh produce to remove the residual of pesticides.

Reduction of Microbial Load on Radish (Raphanus sativus L.) Seeds by Aqueous Chlorine Dioxide and Hot Water Treatments (이산화염소수 및 열수처리에 따른 무(Raphanus sativus L.) 새싹 종자의 미생물 제어 효과)

  • Park, Kee-Jai;Lim, Jeong-Ho;Kim, Ji-Hye;Jeong, Jin-Woong;Jo, Jin-Ho;Jeong, Seong-Woong
    • Korean Journal of Food Preservation
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    • v.14 no.5
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    • pp.487-491
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    • 2007
  • This study was conducted to investigate the effect of treatment with squeous chlorine dioxide and hot water on the germination of radish (Raphanus sativus L.) seeds, and reduction of microbial load on the seeds. Increases in treatment and the concentration of aqueous chlorine dioxide in water resulted in increasing reductions in the counts of total aerobic microbes. Seeds treated with aqueous chlorine dioxide (100 ppm/20min, 200ppm/20min) showed about a 10-fold decrease in microbial loads. Germination of seeds was not adversely affected by any treatment tested, although the germination rate of seeds in the group treated at $55^{\circ}C$ for 20 min was reduced by 10% compared to that of control. Combined treatment with hot water and aqueous chlorine dioxide yielded better out comes in both microbial reduction and seed germination rate than did single treatments. A combined treatment with 100 ppm aqueous chlorine dioxide and hot water($45^{\circ}C$ or $50^{\circ}C$) resulted in about a 100-fold decrease in microbial load whereas germination rate showed only a slight increase to $97.0{\sim}97.7%$. Total aerobic microbial counts in radish seeds were decreased by aqueous chlorine dioxide and hot water treatment in the order. aqueous $CIO_2$+ hot water > aqueous $CIO_2$ > chlorinated water > hot water > control.

Inhibitory Effect of Aqueous Chlorine Dioxide on Survival of Escherichia coli O157:H7, Salmonella typhimurium, and Listeria monocytogenes in Pure Cell Culture (이산화염소가 E. coli O157:H7, Salmonella typhimurium, Listeria monocytogenes의 생존에 미치는 영향)

  • Youm, Hyoung-Jun;Ko, Jong-Kwan;Kim, Mee-Ree;Song, Kyung-Bin
    • Korean Journal of Food Science and Technology
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    • v.36 no.3
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    • pp.514-517
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    • 2004
  • O157:H7, Salmonella typhimurium, Listeria monocytogenes were treated with aqueous chlorine dioxide to elucidate effect of aqueous chlorine dioxide treatment on major food-borne pathogenic bacteria. Survival plot of E.coli O157:H7 at 5 ppm chlorine dioxide showed typical first-order rate. After 5 min of treatment, cell number decreased by 1.5 log cycle. Survival plot slope gave D value of 3.37 min. S. typhimurium and L. monocytogenes showed biphasic curve. Aqueous chlorine dioxide treatment on S. typhimurium and L. monocytogenes resulted in bactericidal effect for 5 min, and thereafter no effect was observed under experimental conditions of this study. These results suggest concentration of chlorine dioxide is more important than treatment time, and 5 ppm chlorine dioxide treatment is not sufficient for sanitizing fresh vegetables.

Evaluation of Two Kinetic Models on the Inactivation of Major Foodborne Pathogens by Aqueous Chlorine Dioxide Treatment (이산화염소수 처리에 의한 주요 식중독균의 불활성화에 관한 두 kinetic models의 비교)

  • Lee, Ji-Hye;Song, Hyeon-Jeong;Song, Kyung-Bin
    • Korean Journal of Food Preservation
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    • v.18 no.3
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    • pp.423-428
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    • 2011
  • Inactivation kinetic data of Escherichia coli O157:H7, Listeria monocytogenes, Staphylococcus aureus, Salmonella Typhimurium, and Salmonella Enteritidis via treatment with aqueous chlorine dioxide treatment at a specific concentration were evaluated using the first-order kinetic and Weibull models. The Weibull model showed a better fit with the kinetic data than the first-order kinetic model. The survival curves after the aqueous chlorine dioxide treatment showed $t_R$ values(time required to reduce microbial populations by 90%) of 2.49 min for E. coli O157:H7 at 5 ppm, 1.47 min for L. monocytogenes at 5 ppm, 0.94 min for S. aureus at 5 ppm, 0.87 min for S. Typhimurium at 1 ppm, and 0.08 min for S. Enteritidis at 1 ppm, according to the Weibull model.

Survival of Escherichia coli O157:H7 and Salmonella typhimurium Inoculated on Chicken by Aqueous Chlorine Dioxide Treatment

  • Hong, Yun-Hee;Ku, Kyoung-Ju;Kim, Min-Ki;Won, Mi-Sun;Chung, Kyung-Sook;Song, Kyung-Bin
    • Journal of Microbiology and Biotechnology
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    • v.18 no.4
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    • pp.742-745
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    • 2008
  • Inactivation of Escherichia coli O157:H7 and Salmonella typhimurium was evaluated on inoculated chicken by aqueous chlorine dioxide ($CIO_2$) treatment. Chicken samples were inoculated with 6-7 log CFU/g of Escherichia coli O157:H7 and Salmonella typhimurium, respectively. The chicken samples were then treated with 0, 50, and 100 ppm of $CIO_2$ solution and stored at $4{\pm}1^{\circ}C$. Aqueous $CIO_2$ treatment decreased the populations of the pathogenic bacteria on the chicken breast and drumstick. In particular, 100 ppm $CIO_2$ treatment on the chicken breast and drumstick reduced Escherichia coli O157:H7 and Salmonella typhimurium by 1.00-1.27 and 1.37-1.44 log CFU/g, respectively. Aqueous $CIO_2$ treatment on the growth of the bacteria was continuously in effect during storage, resulting in the decrease of the populations of Escherichia coli O157:H7 and Salmonella typhimurium. These results suggest that aqueous $CIO_2$ treatment should be useful in improving the microbial safety of chicken during storage.

Inactivation of Agrobacterium tumefaciens Inoculated on Fresh Radix Ginseng by Electron Beam Irradiation and Aqueous Chlorine Dioxide Treatment

  • Chun, Ho-Hyun;Kim, Ju-Yeon;Song, Kyung-Bin
    • Journal of Applied Biological Chemistry
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    • v.51 no.3
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    • pp.117-122
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    • 2008
  • Inactivation of Agrobacterium tumefaciens was evaluated on the inoculated fresh Radix Ginseng by electron beam irradiation or aqueous chlorine dioxide ($ClO_2$) treatment. Two groups of fresh ginsengs were prepared and inoculated with A. tumefaciens. One group was then irradiated at 0, 2, and 4 kGy using an electron beam accelerator, and the other group was treated with 0, 50, and 100 ppm of aqueous $ClO_2$. Microbiological data indicated that populations of A. tumefaciens significantly decreased with increasing irradiation dose or aqueous $ClO_2$ concentration. In particular, A. tumefaciens was eliminated by irradiation at 4 kGy, and 100 ppm $ClO_2$ treatment reduced the populations of A. tumefaciens by 1.44 log CFU/g. These results suggest that electron beam irradiation or aqueous $ClO_2$ treatment can be useful in improving the microbial safety of fresh ginsengs during storage.

Aqueous Chlorine Dioxide Treatment Decreases Microbial Contamination and Preserves Sensory Properties of Mackerel During Storage

  • Kim, Yun-Jung;Nam, Sa-Uk;Chae, Hyeon-Seok;Lee, Seoung-Gyu;Song, Kyung-Bin
    • Preventive Nutrition and Food Science
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    • v.12 no.3
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    • pp.181-184
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    • 2007
  • Effect of aqueous chlorine dioxide ($ClO_{2}$) treatment on quality change of mackerel during storage was examined. Mackerel treated with 0, 5, 10, and 50 ppm of $ClO_{2}$ solution, respectively was stored at $4^{\circ}C$. $ClO_{2}$ treatment decreased populations of aerobic bacteria in mackerel during storage. The number of total aerobic bacteria of mackerel treated with 50 ppm $ClO_{2}$ increased from 2.45 to 3.44 log CFU/g after 9 days of storage, while that of the control increased from 3.47 to 4.72 log CFU/g. The pH values of mackerel increased during storage, with no significant changes among treatments. Volatile basic nitrogen values of mackerel were decreased by $ClO_{2}$ treatment. Quality of mackerel treated with $ClO_{2}$ was better than that of the control during storage based on sensory evaluation. These results indicate that aqueous $ClO_{2}$ treatment could be useful for improving the microbial safety and qualities of mackerel.

Effect of Aqueous Chlorine Dioxide Treatment on the Microbial Growth and Qualities of Strawberries During Storage

  • Jin, You-Young;Kim, Yun-Jung;Chung, Kyung-Sook;Won, Mi-Sun;Song, Kyung-Bin
    • Food Science and Biotechnology
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    • v.16 no.6
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    • pp.1018-1022
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    • 2007
  • Effect of aqueous chlorine dioxide treatment on the microbial growth and quality changes of strawberries during storage was examined. Strawberries were treated with 5, 10, and 50 ppm of chlorine dioxide solution, and stored at $4{\pm}1^{\circ}C$. Total aerobic bacteria in strawberries treated at 50 ppm of chlorine dioxide were increased from 1.40 to 2.10 log CFU/g after 7 days, while increasing in the control from 2.75 to 4.32 log CFU/g. Yeasts and molds in strawberries treated at 50 ppm of chlorine dioxide were increased from 1.10 to 1.97 log CFU/g after 7 days, while the control was increased from 2.55 to 4.50 log CFU/g. The pH and titratable acidity of strawberries were not significantly different among treatments. Sensory evaluation results showed that chlorine dioxide-treated strawberries had better sensory scores than the control. These results indicate that chlorine dioxide treatment could be useful in improving the microbial safety and qualities of strawberries during storage.

Inactivation of Listeria monocytogenes and Campylobacter jejuni in Chicken by Aqueous Chlorine Dioxide Treatment

  • Hong, Yun-Hee;Ku, Gyeong-Ju;Kim, Min-Ki;Song, Kyung-Bin
    • Preventive Nutrition and Food Science
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    • v.12 no.4
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    • pp.279-283
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    • 2007
  • Aqueous chlorine dioxide $(ClO_2)$ treatment was used for the inactivation of Listeria monocytogenes and Campylobacter jejuni in chicken. Chicken breasts and legs were inoculated with $8{\sim}9log\;CFU/g$ of Listeria monocytogenes and Campylobacter jejuni, respectively, and then treated with 0, 50, and 100 ppm of $ClO_2$ solution. Aqueous $ClO_2$ treatment decreased the populations of the pathogenic bacteria on the chicken samples. One hundred ppm $ClO_2$ treatment on the chicken breast and leg reduced the populations of Listeria monocytogenes and Campylobacter jejuni by $0.61{\sim}1.93\;and\;0.99{\sim}1.21log\;CFU/g$, respectively. Aqueous $ClO_2$ treatment affected the microbial growth during storage at $4^{\circ}C$ by decreasing the initial microbial populations. These results clearly suggest that aqueous $ClO_2$ treatment should be useful in improving the microbial safety of chicken during storage and extending the shelf life.

Aqueous Chlorine Dioxide Treatment Improves the Shelf Life of Panax ginseng C.A. Meyer

  • Chun, Ho-Hyun;Song, Kyung-Bin
    • Preventive Nutrition and Food Science
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    • v.12 no.4
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    • pp.284-288
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    • 2007
  • Effect of aqueous chlorine dioxide $(ClO_2)$ treatment on the quality change of fresh ginseng during storage was examined. Fresh ginseng samples were treated with 0, 50, and 100 ppm of $ClO_2$ solution, respectively, and stored at $4^{\circ}C$. Microbiological data of the fresh ginseng after $ClO_2$ treatment revealed that the populations of total aerobic bacteria, and yeast and mold were significantly reduced with the increase of $ClO_2$ concentration. In particular, the populations of total aerobic bacteria, and yeast and mold in the fresh ginseng decreased by 2.1 and 1.2 log CFU/g at 100 ppm $ClO_2$ treatment, respectively. Aqueous $ClO_2$ treatment improved the color of the fresh ginseng during storage, but there was no significant difference in weight loss during storage among treatments. Sensory evaluation results represented that the qualities of the fresh ginseng treated with aqueous $ClO_2$ during storage were better than those of the control. These results clearly indicate that aqueous $ClO_2$ treatment could be useful in decreasing the microbial growth and extending the shelf life of fresh ginseng.