• Title/Summary/Keyword: ACUTE TOXICITY

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Acute and Subchronic Toxicity of Gamma-Irradiated Orange (감마선 조사 오렌지의 급성 및 아만성 독성 평가)

  • Jung, Da-Woon;Huang, Yu-Hua;Choi, Geun-Pyo;Kang, Il-Jun
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.44 no.9
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    • pp.1286-1294
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    • 2015
  • The acute and subchronic toxicity of 1 kGy gamma-irradiated orange was evaluated in ICR mice. For acute toxicity, groups of 30 male and 30 female ICR mice were orally administered 1 kGy gamma-irradiated orange (0, 1,000, and 2,000 mg/kg). The mortality, clinical sign, body weight changes, and necropsy findings of ICR mice were observed for 14 days. No significant changes in body weight or abnormal gross findings were observed in relation to 1 kGy gamma-irradiated orange. Hematological and serum biochemical parameters were within normal ranges. According to the results, 1 kGy gamma-irradiated orange had no special toxic effects in male and female ICR mice at 2,000 mg/kg. For subchronic toxicity, groups of 36 male and 36 female ICR mice were given a diet of 1 kGy gamma-irradiated orange for 13 weeks (control, non-irradiated, and irradiated imported orange). During the experimental period, mortality, clinical signs, body weight change, food consumption, organ weight, and histopathological examination did not show any changes in comparison to the control group. Several hematological and serum biochemical parameters showed statistically significant changes, but these changes were within normal range. These results indicate that 1 kGy gamma-irradiated orange did not cause any toxic effects in male and female ICR mice and therefore can be considered as safe.

A Study for Acute and Four-week Intravenous Toxicity of Alginase in Rats (랫드에서 Alginase의 급성 및 4주간 정맥 내 반복투여 독성시험에 관한 연구)

  • Ihm, Jong-Hee;Nam, Jeong-Seok;Che, Jeong-Hwan;Li, Guang-Xun;Lee, Hak-Mo;Lee, Won-Woo;Yi, Beoung-Hi;Jung, Ji-Youn;Park, Jae-Hak;Lee, Yong-Soon;,
    • Toxicological Research
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    • v.14 no.3
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    • pp.435-441
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    • 1998
  • Alginase$Alginase^{ⓡ}$ (Arginine esterase) is one of the snake venoms which is mainly consisted of arginine esterase and acts as a thrombus -forming inhibitor/thrombus-lysin. These present studies were performed to investigate of the acute and subacute toxicity of the Alginase$Alginase^{ⓡ}$ in rats. In acute toxicity study, rats were single administered intravenously with dosages of 0.001, 0.01. 0.1, 1 and 10U/kg B.W. and examined the number of death, clinical sign, body weight and pathological change for 7days after administration of Alginase$Alginase^{ⓡ}$. At maximum dose level (10U/kg B.W.), Alginase$Alginase^{ⓡ}$ induced symptoms of shock with cyanosis and dyspnea. But these symptoms dissappeared after 30~50 minutes and we could not find any other toxic effect in rats. Therefore, $LD_{50}$ Value of Alginase was over 10U/kg B.W. in rats. In four-week intravenous toxicity study of Alginase$Alginase^{ⓡ}$, rats were administered intravenously seven days per week for 28 days, with dosages of 0, 0.0125, 0.125 and 1.25U/kg B.W./day, respectively. Alginase$Alginase^{ⓡ}$ did not caused any death and showed any clinical signs in rats. No significant Alginase$Alginase^{ⓡ}$ -related changes were found in feed uptake, water consumption, hematology, serum biochemistry, urinalysis, ocular examination, organ weight and histopathological examination. From the results, Alginase$Alginase^{ⓡ}$ seems not to have any toxic effect in rats when it were given daily intravenous injections below the dosage 1.25U/kg B.W./day for four weeks.

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Acute Oral and Genetic Toxicity Study of ASCO EAQ80, a Novel Cationic Surfactant (투명 양이온 계면활성제 ASCO EAQ80에 대한 급성 경구 독성시험 및 유전 독성시험에 관한 연구)

  • Kim, Byeong-Jo;Kim, Dong-Hyeon;Lee, Jong-Ki;Moon, Surk-Sik
    • Applied Chemistry for Engineering
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    • v.20 no.2
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    • pp.145-153
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    • 2009
  • The acute oral and genetic toxicity of ASCO EAQ80 was established in this study. ASCO EAQ80, a novel cationic surfactant produced by Aekyung Speciality Chemicals Co. LTD. is currently commercialized as a clear fabric softener. In acute oral toxicity study, the 50% lethal dose $(LD_{50})$ of ASCO EAQ80 was determined to be higher than 5000 mg/kg and this product could be classified as Category 5 or Unclassified by Globally Harmonized Classification System. Also, to establish the gene-toxicity of ASCO EAQ80, we performed bacterial reversion assay against Salmonella typhimurium TA98, TA100, TA1535, TA1537, Escherichia coli WP2uvrA, and in vitro chromosomal aberration assay against Chinese hamster lung cells in the presence and absence of S-9 metabolic activation system. From these experiments, ASCO EAQ80 revealed nonmutagenic potential in S. typhimurium TA98, TA100, TA1535, TA1537, and Escherichia coli WP2uvrA both in the absence and presence of metabolic activation system. No clastogenicity of ASCO EAQ80 was observed in chromosomal aberration assay in vitro.

Acute Toxicity Assessment of New Algicides, Thiazolidinedione Derivative (TD49) to Marine Ecosystem (신규 살조물질인 Thiazolidinedione 유도체 (TD49)의 해양생태계에 대한 급성독성평가)

  • Yim, Eun-Chae;Shin, Jun-Jae;Park, In-Taek;Han, Hyo-Kyung;Kim, Si-Wouk;Cho, Hoon;Kim, Seong-Jun
    • KSBB Journal
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    • v.25 no.6
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    • pp.527-532
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    • 2010
  • A thiazolidinedione derivative, TD49 with the highly selective algicide to red tide was newly synthesized and its acute toxicity was examined in order to evaluate the effect on aquatic ecosystems of coast. Major three species having important role in the food chain of marine ecosystem, such as Skeletonema costatum of microalgae, Daphnia magna of crustacea, Paralichthys olivaceus of flatfish fingerling were employed for the acute toxicity assessment. $EC_50$ or $LC_50$ as the assessment criterion was investigated to each specie, and NOEC (No Observed Effect Concentration) and PNEC (Predicted No Effect Concentration) from most sensitive specie to toxicity of TD49 were further calculated. $EC_50$ of S. costatum in 96-hour, $EC_50$ of D. magna in 48-hour, and $LC_50$ of P. olivaceus in 72-hour for TD49 were $0.34\;{\mu}M$, $0.68\;{\mu}M$, and $0.58\;{\mu}M$, respectively. NOEC from the results of S. costatum was estimated to be $0.20\;{\mu}M$ and PNEC was estimated as 3.40 nM by applying factor value of 100 to $EC_50$ $0.34\;{\mu}M$ of S. costatum. In addition, it was revealed that Solutol used as the dispersing agent of TD49 had very little toxic influence under the concentration range of $0{\sim}0.4\;{\mu}M$ used in TD49 toxicity experiment. Although the estimated concentration of TD49 that will be sprayed onto the coastal field for the algicide is higher than NOEC value, it is considered that the spraying concentration would not be a considerable problem due to a dilution effect by tide at the opened coast.

Applicability of QSAR Models for Acute Aquatic Toxicity under the Act on Registration, Evaluation, etc. of Chemicals in the Republic of Korea (화평법에 따른 급성 수생독성 예측을 위한 QSAR 모델의 활용 가능성 연구)

  • Kang, Dongjin;Jang, Seok-Won;Lee, Si-Won;Lee, Jae-Hyun;Lee, Sang Hee;Kim, Pilje;Chung, Hyen-Mi;Seong, Chang-Ho
    • Journal of Environmental Health Sciences
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    • v.48 no.3
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    • pp.159-166
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    • 2022
  • Background: A quantitative structure-activity relationship (QSAR) model was adopted in the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH, EU) regulations as well as the Act on Registration, Evaluation, etc. of Chemicals (AREC, Republic of Korea). It has been previously used in the registration of chemicals. Objectives: In this study, we investigated the correlation between the predicted data provided by three prediction programs using a QSAR model and actual experimental results (acute fish, daphnia magna toxicity). Through this approach, we aimed to effectively conjecture on the performance and determine the most applicable programs when designating toxic substances through the AREC. Methods: Chemicals that had been registered and evaluated in the Toxic Chemicals Control Act (TCCA, Republic of Korea) were selected for this study. Two prediction programs developed and operated by the U.S. EPA - the Ecological Structure-Activity Relationship (ECOSAR) and Toxicity Estimation Software Tool (T.E.S.T.) models - were utilized along with the TOPKAT (Toxicity Prediction by Komputer Assisted Technology) commercial program. The applicability of these three programs was evaluated according to three parameters: accuracy, sensitivity, and specificity. Results: The prediction analysis on fish and daphnia magna in the three programs showed that the TOPKAT program had better sensitivity than the others. Conclusions: Although the predictive performance of the TOPKAT program when using a single predictive program was found to perform well in toxic substance designation, using a single program involves many restrictions. It is necessary to validate the reliability of predictions by utilizing multiple methods when applying the prediction program to the regulation of chemicals.

Study of Medicinal Herbs for Applications in Functional Foods -Antifatigue Effects and Safety Evaluation of Leaf and Stem Extract of the Panax Ginseng- (가능성 식품으로의 활용을 위한 한약자원에 관한 연구 -인삼잎과 줄기 혼합 추출액의 항피로 효과 및 안전성 평가-)

  • Han Jong Hyun;Park Sung Hye
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.18 no.4
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    • pp.1134-1139
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    • 2004
  • This study was conducted to investigate the application possibility of leaf and stem extract(LSE) from the mixture of leaf and stem of ginseng radix(Panax Ginseng CA Meyer). This study measured antifatigue effects by rota-rod test and swimming test. Also we examined the cell toxicity in normal liver and kidney cells, and acute toxicity in mice. Dropping times of LSE treated group decreased about 39-83% compared to the control group according to supplementation intake levels. Swimming time in LSE treated group increased compared to the control group at short and long supplementation. Negative effects were not found from the results of the cell toxicity. Also acute toxicity not shown. These results imply that the leaf and stem of ginseng radix could be used as possible food resources and functional food material and feed stuff.

Single Dose Toxicity Studies of C.1-50005 (Hepatitis A virus Vaccine) in Rats and Dogs (CJ-50005(A형 간염백신)의 Rat 및 Dog에서의 단회투여독성)

  • 김종호;이성학;최재목;김달현;김현석;정용주
    • Toxicological Research
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    • v.17 no.4
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    • pp.297-301
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    • 2001
  • The acute toxicity of CJ-50005, an inactivated whole virus vaccine derived from hepatitis A virus (HM175) grown in human MRC-5 diploid fibroblast culture, was tested in Sprague Dawley (SD) rats and beagle dogs. CJ-50005 was orally and intramuscularly administered up to the maximum dose of 81$\mu\textrm{g}$/kg. as much as 3,000 times of the expected clinical dose, in SD rats and was intramuscularly administered up to 27 $\mu\textrm{g}$/kg, as much as 1,000 times of the expected clinical dose, in beagle dogs. In these experiments, there were no death and clinical changes which were related to CJ-50005 administration. In addition, there were no significant changes between control and treated groups in body weights and autopsy findings. In conclusion, the administration of CJ-50005 over 81$\mu\textrm{g}$/kg in SD rats and over 27$\mu\textrm{g}$/kg in beagle dogs was proved to be safe, and it is thought that CJ-50005 may not show any toxicity in its clinical use.

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Studies on the Acute Toxicity and Histological Changes in Fish Exposed to Furrural (Furfural 어류급성독성 및 조직병리에 관한 연구)

  • 이철우;최성수;최필선;이상협;이길철;박광식
    • Environmental Analysis Health and Toxicology
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    • v.12 no.3_4
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    • pp.55-59
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    • 1997
  • Furfural, an organic solvent, is widely used as synthetic component material in producing chemical products. However, furfural has been reported that it shows strong toxicities to human being showing intense stimulus to skin, eyes, mucous membrane and nerve system. It is also known to cause anemia, liver cirrhosis, kidney failure and genetic toxicity in the human being working in the exposed area. LD$_{50}$ of furfural for peritoneal injected mouse has been known around 20mg/kg, but the acute toxicity on aquatic organisms such as fish, daphnid or algae are not well known, compared to those on rodents. In this experiment, we studied on the fish toxicity of furfural using Japanese Medaka (Orvzias latipes) and Common Carp (Cvprinus carpio). We also observed histological changes in the fish organs. The LC$_{50}$ were 12. Smg/L in Japanese Medaka and 21.8 mg/L in Common Carp, respectively. When Common Carps were exposed to 120mg/L of furfural concentration for 30 minutes, blood congestion in gills and lysis of secondary lamella were shown. Though the muscle of caudal fin was not completely eroded, its epidermic cells were shown to be necrotic in various parts. Tissue atrophy and cell necrosis were also shown in the liver of Common Carps exposed to furfural. From these results, furfural seems to cause histological damages on liver, an internal organ as well as on external organs such as gills and fins eventhough the fish were exposed for a short-term.

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A Study on the Hazardousness Evaluation and the Inhalation Toxicity of Methylcyclohexane (메틸사이클로핵산 (methylcyclohexane)의 흡입독성과 유해성 평가)

  • Kim Hyeon-Yeong;Lee Sung-Bae;Kang Min-Gu;Song Si-Hwan
    • Environmental Analysis Health and Toxicology
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    • v.21 no.2 s.53
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    • pp.173-184
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    • 2006
  • From the harmfulness expectation test conducted through a toxicity anticipation program, methylcyclohexane turned out to be harmful and simulative, but no carcinogenicity was anticipated. In a four-hour acute inhalation toxicity test, the result showed that lethal concentration ($LC_{50}$) was 3,750 ppm (15,054 mg/L), which was identified as a harmful substance on the basis of the harmful substance classification standard $2 of the Industrial safety and health law. methylcyclohexane fell under the category $4(2,500 substance from the GHS standard acute toxicity harmfulness classification. Also, from subchronic inhalation toxicity test that included 6 hours a day, five days a week, and for 13 weeks, we could observe weight, activity, long term weight, blood and blood biochemical influence from the exposure of test substance. No-observed effect level (NOEL) was determined below $100{\sim}400ppm$ inboth male and female. This material falls under the Category 2 ($50{\sim}250ppm/6hours/90days$) in the GHS (Globally Harmonized System) standard trace long-term whole body toxicity repeated exposure, and can be classified as a harmful substance in accordance with the Industrial Safety and Health Law harmful substance standard $NOEL{\leq}0.5mg/L/6hr/90day$ (rat).

Application of a Microbial Toxicity Assay for Monitoring Treatment Efficiency of Pentachlorophenol in Water using UV Photolysis and $TiO_2$ Photocatalysis

  • Kim, Jung-Kon;Cho, Il-Hyung;Zoh, Kyung-Duk;Choi, Kyung-Ho
    • Proceedings of the Korean Environmental Health Society Conference
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    • 2004.06a
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    • pp.146-150
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    • 2004
  • Degradation efficiency of pentachlorophenol (PCP) by using direct UV photolysis and $TiO_2$ photocatalysis was evaluated with both chemical analyses and acute toxicity assessment employing luminescent bacteria Vibrio fischeri. PCP was chosen as a target compound in this study because of its wide application as fungicide, bactericide, insecticide and wood preservative in agriculture and many industries, in addition to its well-known environmental consequences. The acute toxicity to the microbe was reduced by >60% when applying UV alone, and was completely removed when treated with $UV-TiO_2$ combinations. Toxicity reduction pattern determined with the Microtox Assay generally corresponds with the chemistry data: However, it should be noted that toxicity was greater than expected by the chemistry data. Formation of TCBQ, a toxic byprodut, could not explain observed microbial toxicity. These observations are probably due to the presence of unidentified toxic PCP byproducts, which may include polychlorinated dibenzodioxins and polychlorinated dibenzofurans. When Microtox results were compared between different exposure time, i.e.,5 min and 15 min, an interesting pattern was noted with $UVA-\;TiO_2$ treatment. While no microbial toxicity was observed with 5 min exposure, an EC50 value of 45.4% was estimated with 15 min exposure, which was not observed in $UVB-\;TiO_2$ exposure. This result may suggest the presence of unidentified toxic degradation products generated in the later stage of treatment. Based on this study, $TiO_2$ photocatalyst, together with UVB photolysis could improve the removal of both PCP and its toxic derivatives in more efficient way. The Microtox Assay is promising and economical method for monitoring efficiency of wastewater treatment processes.

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