• Research in Plant Disease
• /
• v.10 no.2
• /
• pp.150-153
• /
• 2004

This study was conducted to investigate the sap transmission pattern of CGMMV and to select the disinfectant of sap transmission on watermelon cultivation. Being investigated CGMMV occurrence change after transplanting two diseased plants among 47 plants on the watermelon house, disease spread rapidly from early growth stage of 4 % to late growth stage of 83 %. When the grafting knife and topping scissor was dipped onto the several disinfectants before grafting or topping, disease suppressed 87-95 % on whole milk, skim milk, tri-sodium phosphate, and sodium hypo-chloride solution. Disinfection effects of 88.2 % and 91.2 % on whole milk and skim milk were showed when the hand dipped on the disinfectants.

• Korean Journal of Food Science and Technology
• /
• v.37 no.6
• /
• pp.1042-1047
• /
• 2005

Effects of sanitizers and disinfectants on microorganisms in food-processing plants were investigated. Chlorine and hydrogen peroxide were most effective, showing approximately 2-3 log reductions, among products tested, whereas alcohol showed less than 1 log reduction. Before using sanitizer and disinfectant in food processing plants, aerobic plate, coliforms, and E. coli counts were about $10^1-10^5,\;10^1-10^2$, and below $10\;CFU/cm^2$, respectively. After use of sanitizer, APC decreased to $10^1-10^2$. The result to confirm sanitizing effectiveness for 2 months using showed that Alcohol compound, QAC, hydrogen peroxide compound were effective against Staphylococcus aureus ATCC 6538 and E. coli ATCC 10536 at recommended usage concentrations, whereas effectiveness of chlorine compound decreased from 8 to 4 log 2 weeks after opening of product. Although sanitizers and disinfectants approved by law showed 5 log reduction in vitro for S. aureus ATCC 6538 and E, coli ATCC 10536, sanitizing effectiveness in food processing plants was very low, and effectiveness decreased once used product was stored.

• Journal of Aquaculture
• /
• v.21 no.1
• /
• pp.7-12
• /
• 2008

Toxicity of ten commercial disinfectants(hydrogen peroxide, sodium hypochlorite, chlorine dioxide, povidon iodine, formaldehyde, glutaraldehyde, quaternary ammonium compounds(QAC), didecyl dimethyl ammonium chloride(DDAC), ortho-dichlorobenzene, and copper sulfate) was measured by chinook salmon embryo-214 cell line and three fish species: flounder Paralichthys olivaceus, black rockfish Sebastes pachycephalus, and black sea bream Acanthopagrus schlegelii. The $LC_{50}$ levels of 24 hours acute toxicity with the ten disinfectants were tested in three species of fish. Effectiveness of ten chemical disinfectants were varied by each chemical as well as by species. Hydrogen peroxide showed the higest activity at 201, 269, and 139 ppm in the flounder, the black rockfish, and black sea bream, respectively. DDAC showed the lowest activity at 2.1, 1.0, and 1.5 ppm in the flounder, the black rockfish, and black sea bream, respectively. The highest variation was observed in copper sulfate by both the chemicals and the species.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2006.04a
• /
• pp.272-273
• /
• 2006

• 동물약계
• /
• no.72
• /
• pp.3-3
• /
• 2000

[ $\cdot$ ]제4차 이사회 개최 $\cdot$동물약사감시 행정처분 결과 홍보 $\cdot$제3차 전국 소독의 날 소독 실시 $\cdot$회원사 대표자 협의회 개최 $\cdot$소동물진료용 인체약품 대체 공급을 위한 협의회 개최 $\cdot$품질관리우수업체 지정을 위한 시설자금 지원 $\cdot$동물약품 유통질서 확립 촉구

• Ecology and Resilient Infrastructure
• /
• v.5 no.3
• /
• pp.111-117
• /
• 2018

Disinfection of ballast water using chlorine dioxide was investigated under various initial microorganism contents, dose concentrations and pH values. Kinetics of microorganism inactivation and byproduct generation of chlorine dioxide treatment were compared with the chlorine treatment. Results of treatments with chlorine dioxide concentrations of 0 to $10mg\;Cl_2/L$ showed that The optimum concentration of chlorine dioxide required for disinfection of ballast water was 1 mg/L. The difference among the second order reaction constants for bacterial disinfection at pH 7.2 to 9.2 for chlorine dioxide was less than 5% for both bacteria. This result implied that the bactericidal effects of chlorine dioxide was independent of the pH in the examined range. On the other hand, the inactivation kinetics of chlorine for E. coli and Enterococcus decreased by 17% and 25%, respectively, when pH increased from 7.2 to 9.2. The bactericidal power of chlorine dioxide was superior to sodium hypochlorite above pH 8.2, the average pH value of sea water. Furthermore, treatments of chlorine dioxide generated less harmful byproducts than chlorine and had a long-term disinfection effect on bacteria and phytoplankton from the results of experiment for 30 days. Chlorine dioxide would be a promising alternative disinfectant for ballast water.

• Korean journal of applied entomology
• /
• v.26 no.2 s.71
• /
• pp.107-111
• /
• 1987

Experiments were caried out to invesstigate the effects of seed disinfectant and the chemical control method in the paddy field for the rice white-tip nematode, Aphelenchoides besseyi. All three seed disinfectants tested, MEP 50% EC, Fenthion 50% EC, Dasuzin 34% EC showed effective control without any symptom of phytotoxicity. Mixed treatments with fungicides, Benoram 40% Wp, proraz-25% EC, TCM 30% EC also showed the effective control and no phytotoxicity. Effective chemical control methods for the rice white-tip nematode in paddy fields was seed disinfectant before seeding and Carbofuran 3% G. on the day before the transplanting, or seed disinfectatnt + Carbofuran 3% G. water surface treatment on the early stage of injury.

• Journal of Korean Society of Water and Wastewater
• /
• v.30 no.1
• /
• pp.9-17
• /
• 2016

Disinfectant/oxidation process is a crucial process in water treatment for supplying safe drinking water. Chlorination is still widely used for water treatment area due to its effectiveness on microbial inactivation and economic feasibility. Recently, disinfection concern in marine environment is increasing, for example, movement of hazardous marine organism due to ballast water, marine environmental degradation due to power plant cooling water discharge, and increase of the amount of disinfectant in the offshore plant. It is needed to conduct the assessment of disinfectant behavior and the development of disinfectant prediction model in seawater. The appropriate prediction model for disinfectant behavior is not yet provided. The objective of the study is to develop chlorine decay model in seawater. Various model types were applied to develop the seawater chlorine decay model, such as first order decay model, EPA model, and two-phase model. The model simulation indicated that chlorine decay in seawater is influenced by both organic and inorganic matter in seawater. While inorganic matter has a negative correlation with the chlorine decay, organic matter has a positive correlation with the chlorine decay.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.13 no.2
• /
• pp.208-216
• /
• 2006

Purpose: This study was done to identify the differences in effectiveness of disinfections for surgical hand scrubbing according to the duration of scrubbing and the type of disinfectant. Method: From June 30 to August 14, 2003, the data were collected from 30 surgical nurses and surgeons in one general hospital in P city, Korea. All participants washed their hands with two different disinfectants and four different scrubbing times, they placed both finger tips on a blood agar plate and using sterile cotton tips microbes were collected from their palms, nails and forearms. Results: The first hypothesis of this study(with same disinfectant, there will be no difference in effect of disinfection in surgical hand scrub among four time groups) was supported. The second hypothesis of this study(with same duration of surgical hand scrub, there will be no difference in effect between two disinfectants) was also supported. Conclusion: There are no differences in effectiveness of disinfection for surgical hand scrubbing according to duration of the scrubbing and the type of disinfectant. So it is concluded that the effectiveness of disinfection depends more on the exactly how the scrubbing is done rather than the duration of scrubbing or the type of disinfectant.

• 동물약계
• /
• no.93
• /
• pp.4-5
• /
• 2004

[ $\cdot$ ]동물약품물류조합 설립추진에 대한 의견 제출 $\cdot$긴급이사회 개최 $\cdot$니트로후란제제 수출용 품목허가 허용 건의 $\cdot$2004년도 병역지정업체 선정 $\cdot$동물약사감시 행정처분 결과 홍보 $\cdot$동물용의약품 정보관리시스템 점검단 운영 $\cdot$축산기술연구소 기관 명칭 변경 $\cdot$대북한 수의약품 지원 검토 $\cdot$제1차 이사회 개최 $\cdot$제12차 정기총회 개최 $\cdot$소독제 효력시험 관련 협의회 개최 $\cdot$수출전시회 전략 교육 협의회 개최 $\cdot$동물약품제조용 양허관세적용 유당 배정