• Title/Summary/Keyword: hygienic safety

Search Result 160, Processing Time 0.026 seconds

Hygienic Quality and Genotoxicological Safety of Gamma Irradiated Pork (감마선조사에 의한 돈육의 위생화 및 유전독성학적 안전성 평가)

  • 강일준;윤정한;강영희;이효구;변명우
    • Journal of the Korean Society of Food Science and Nutrition
    • /
    • v.28 no.5
    • /
    • pp.1092-1098
    • /
    • 1999
  • Gamma irradiation was applied to pork for improving its hygienic quality and evaluating its possible genotoxicity. The effective dose of irradiation was 3 kGy in pork for the sterilization of all contaminated microorganisms tested. After 8 weeks of storage at 5oC, no growth of microorganisms except for psychrophile and total aerobic bacteria was observed in the more than 3 kGy irradiated pork. The genotoxicity of high dose irradiated pork(30 kGy) was evaluated by Salmonella typhimurium reversion assay, chromosomal aberration test and in vivo micronucleus assay. The results were negative in the bacterial reversion assay with S. typhimurium TA98, TA100, TA1535, TA1537. In chromosomal aberration tests with CHL cells and in vivo mouse micronucleus assay, no significant difference in the incidences of chromosomal aberration and micronuclei was seen between nonirradiated and 30 kGy irradiated porks. These results indicate that 30 kGy irradiated pork did not show any genotoxic effects under these experimental conditions.

  • PDF

Effect of Raw Material Freshness on Quality and Safety of Anchovy Fish Sauce (원료의 선도가 멸치액젓의 품질 및 위생안전성에 미치는 영향)

  • CHO, Young-Je;JUNG, Min-Hong;KIM, Bo-Kyoung;JUNG, Woo-Young;GYE, Hyeon-Jin;JUNG, Hyo-Jung
    • Journal of Fisheries and Marine Sciences Education
    • /
    • v.27 no.4
    • /
    • pp.1194-1201
    • /
    • 2015
  • This study conducted to investigate the impact of raw material freshness on the quality and hygienic safety of anchovy fish sauce and suggest the importance of raw material freshness to make high-quality and hygienic anchovy fish sauce by measuring the chemical compositions and histamine. To devide the raw material's freshness levels, raw anchovy was left for 24 hours and was sampled every 4 hour(Group I-VII). As a result, the levels of VBN(volatile basic nitrogen) and histamine increased as time passed each contents were 16.29-87.65 mg/100 g and 6.14-1499.63 mg/100 g respectively. As fish sauce fermented for 18 months, the contents of VBN were 205.31-270.51 mg/100 g and histamine were 120.54-1707.22 mg/100 g, respectively. These results means the levels of VBN and histamine of raw materials are significantly associated with the hygiene of anchovy fish sauce. To investigate the reason of different contents of histamine at each fish sauce, bacteria from each groups were isolated and identified. At group V-VII those the lowest three groups, Leconostoc mesenteroides ssp. cremoris was identified and that produced the highest content of histamine 22.88-101.69 mg/kg and the others produced histamine 3.79-20.2 mg/kg. This means that fish sauce made by low freshness materials contain bacteria have strong ability to make histamine from histidine. Therefore, the freshness of raw material influences the hygiene and safety of fish sauce, and it is most important to manage the freshness of raw material to make the high quality and hygienically safe fish sauce.

Seasonal Change in the Quality Characteristics of Commercial Kimchi (국내 유통 김치의 계절별 품질특성 변화)

  • Lee, Jae Yong;Cheon, Seon Hwa;Kim, Su-Ji;Lee, Hee-Min;Lee, Hae-Won;You, Su-Yeon;Yoon, So Ra;Hwang, In Min;Jung, Ji-Hye;Kim, Sung Hyun
    • Journal of the Korean Society of Food Culture
    • /
    • v.34 no.2
    • /
    • pp.224-232
    • /
    • 2019
  • This study evaluated the physicochemical and microbial quality characteristic of seasonal commercial kimchi for hygienic safety levels. The pH of seasonal commercial kimchi was 3.84-6.36 and the titratable acidity and salinity of the samples were 0.21-1.16 and 1.19-1.54%, respectively. The content of nitrate and nitrite in the commercial kimchi were lower in the spring and summer, which was affected by acidic condition of the kimchi depending on fermentation. Heavy metal contents in commercial kimchi are not an issue because they were detected only at very low levels. The total aerobic bacteria and coliforms counts ranged from 5.25 to 8.44 Log CFU/g and 0.00 to 5.08 Log CFU/g, respectively. The total aerobic bacteria and coliforms were detected more in summer than in the other seasons. E. coli was detected in three of the samples tested. Food-borne pathogens were not detected in any of the samples except for B. cereus. B. cereus was detected in the fall in more than 70% of samples. These results suggest that commercial kimchi distributed in the fall maintain the quality properties and the microbiological safety of kimchi compared to the other seasons. Therefore, further studies as an effective distribution system for the particular seasons will be needed to guarantee the hygienic safety levels of commercial kimchi required by the consumers.

A Correlation Study of Surveillance Data and ATP Bioluminescence Assay for Verification of Hygienic Status in Major Hotels in Seoul (서울 시내 주요 호텔의 위생실태 조사와 ATP 결과의 상관 분석 연구)

  • Kim, Bo-Yeon;Song, Ha-Young;Park, In-Sook;Kim, Yong-Su;Lee, Yu-Si;Ha, Sang-Do
    • Journal of Food Hygiene and Safety
    • /
    • v.24 no.3
    • /
    • pp.277-284
    • /
    • 2009
  • Currently food-borne disease is being increased at outdoor food services including hotels and restaurants. Speedy and convenient practical monitoring techniques to determine hygienic conditions are needed. This study was designed to verify correlation of direct ATP (Adenosine Tri-Phosphate) examination method using ATP bioluminescence and surveillance with check-list by inspector. Hygienic status of personal hygiene (hands), kitchen utensils (knives, chopping boards, kitchen towels, cap openers, food storage containers, and blade of slice machines), facilities and equipments (refrigerator handles, worktables, and sinks) in five major hotels in Seoul were examined. The result of personal hygiene of hotels was relatively better than other inspection items (46.6 points in personal hygiene, 40.2 points in kitchen utensils, 40.3 points in facilities & equipments). In ATP inspection, kitchen utensils and facilities & equipments were relatively clean comparing with personal hands data ($40.8{\pm}6.77\;RLU/cm^2$). After correlation analysis of surveillance in hygienic status points and ATP value, all results showed negative and high correlation. The surveillance data and ATP results investigating personal hygiene, kitchen utensils and facilities & equipments were highly correlated. The ATP examination method which shows real-time identification could be considered as an appropriate method to alternate current check-list dependent safety management in food services including hotels.

Hygienic Quality and Safety of Gamma Irradiated Angelicae Gigantis Radix and Aloe (감마선조사에 의한 당귀와 알로에의 위생화 및 안전성 평가)

  • 강일준;이수용;이상준;김광훈;이병훈
    • Toxicological Research
    • /
    • v.13 no.1_2
    • /
    • pp.55-60
    • /
    • 1997
  • Gamma irradiation was applied to Angelicae gigantis radix and Aloe to improve their hygienic quality. The effective dose of irradiation was 7 kGy in Angelicae gigantis radlx and 5 kGy in Aloe for the sterilization of all contaminated microorganisms tested. After 8 months of storage at room temperature, no growth of microorganisms was observed in the irradiated products. The safety of these products were evaluated by Salmonella typhimurium reversion assay and in vivo micronucleus assay using mouse bone marrow cells. They were negative in the bacterial reversion assay with S. typhimurium TA 98, TA100, TA1535 and TA1537. In the in vivo mouse micronucleus assay, they did not show any clastogenic effect at all doses tested. These results indicate that the gamma irradiation of Angelicae gigantis radix at 12 kGy and of Aloe at 10 kGy have no genotoxic effects under these experimental conditions.

  • PDF

Comparative Effect of ${\gamma}$-Irradiation and Ozone Treatment for the Improvement of Hygienic Quality of Dried-Angelica Keiskei Koidz Powder (신선초 분말의 위생화를 위한 오존처리와 감미선 조사와의 비교 효과)

  • 변명우;육홍선;김정옥;김종군;이현자
    • Journal of Food Hygiene and Safety
    • /
    • v.12 no.2
    • /
    • pp.111-116
    • /
    • 1997
  • For the purpose of improving hygienic quality of dried-Angelica Keiskei Koidz powder, the effect of ozone treatment and gamma irradiation on the microbial decontamination and physicochemical properties were investigated. Gamma irradiation at 5 to 7.5 kGy resulted in sterilizing total aerobic bacteria, molds and coliforms below detective levels, while ozone treatment for 8 hours up to 18 ppm did not sufficiently eliminate the total aerobic bacteria of the sample. The physicochemical properties of the sample were not changed by gamma irradiation up to 7.5 kGy, whereas, ozone treatment caused remarkable changes in pH, TBA value, chlorophyll, carotenoid and fatty acid compositions. Therefore, this investigation demonstrated conclusively that gamma irradiation was more effective than ozone treatment for decontaminating and sterilizing the dried-Angelica Keiskei Koidz powder, with minimal effect on the physicochemical properties analyzed.

  • PDF