• 대한한의학회지
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• 제44권3호
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• pp.29-38
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• 2023

Objectives: This study aimed to investigate the acute oral toxicity of 77 herbal formulas and performed in male and female Sprague-Dawley (SD) rats as per the guidelines mentioned in Ministry of Food and Drug Safety. Methods: Each sex of SD rat were administered a single dose (2000 or 5000 mg/kg) of 77 herbal formulas via oral gavage; the control group received vehicle only. After administration, the mortality, clinical signs, gross findings, and body weight were followed up for 15 days. Results: After administration of 77 herbal formulas, mortality, clinical signs, body weight changes, and gross findings related to the test substances were not observed in both male and female groups. Conclusion: Our results demonstrate the single-dose oral administration of 77 herbal formulas produced no mortality indicating the approximate lethal dose is greater than 2000 or 5000 mg/kg body weight.

• 농약과학회지
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• 제17권4호
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• pp.473-477
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• 2013

본 연구는 병해충 관리용 유기농업자재 허용물질로 지정된 식물추출물 중 님 추출물과 고삼추출물, 데리스 추출물 원제의 독성 평가를 위해 꿀벌에 대한 급성 접촉 및 섭식독성시험을 수행하였다. 급성접촉독성시험결과 님 추출물 2종과 데리스 추출물 2종은 $LD_{50}$이 100 ${\mu}g/bee$ 이상으로 독성이 매우 낮았고 고삼 추출물은 2종 모두 $LD_{50}$(48h)이 1.7 ${\mu}g/bee$로 매우 강한 독성을 보였다. 급성섭식독성시험결과 님 추출물 2종과 데리스 추출물 2종은 $LD_{50}$이 100 ${\mu}g/bee$ 이상으로 독성이 매우 낮았고 고삼 추출물A는 $LD_{50}$(48h)이 1.7 ${\mu}g/bee$, 고삼 추출물B는 $LD_{50}$(48h)이 0.3 ${\mu}g/bee$으로 모두 매우 강한 독성이 있는 것으로 평가되었다.

• 한국식품위생안전성학회지
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• 제26권4호
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• pp.377-382
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• 2011

살균소독제, 라미아-킬(benzalkonium chloride(20%), citric acid(20%))에 대하여 랫드와 토끼를 이용하여 급성경구독 성과 피부 자극성 평가를 각각 수행하였다. 랫드에 라미아-킬 2,000 mg/kg 농도를 최고농도로 하여 단회 투여 후, 14일간 관찰한 결과, 사망, 이상증상 및 체 중변화 등은 관찰되지 않아, 라미아-킬의 $LD_{50}$은 2,000 mg/kg 이상으로 추정되었다. 토끼의 등 부위의 털을 제거하고 찰과부위와 비찰과 부위에 여러 농도로 라미아-킬을 도포 한 후, 피부 자극성을 확인한 결과, 라미아-킬의 l차 자극 지수가 0.50으로 비자극성 물질로 분류되었다. 따라서, 본 연구를 통하여, 라미아-킬은 급성경구독성 시 안전한 물질이며, 피부 자극성을 야기하지 않는 물질로 평가되었다.

• 한국해양학회지
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• 제13권1호
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• pp.35-43
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• 1978

Short-term acute toxicity of mercury, cadmium and copper to arkshell, Anadara broughtonii, and to oyster, Crassostrea gigas, was determinedby static bioassays from 20 May to 27 June in 1977. During the observations of the opening rate of the shell mercury was the most sensitive toxicant of the three toxic substances to the test animals and caused them to close their shellvalves together after being exposed to a mercury solution for an hour during the test. Opening rate to cadmium and copper increased gradually at the higher concentration. the 96hr-LC50 values for the test animals are 4.84mg/l for mercury and 1.86mg/l for cadmium, while the 72hr-LC50 value for copper is 0.31mg/l. the death rate of oysters for cadmium showed lower than that of the mercury and copper test solutions. The 96hr-LC50 values of mercury, copper and cadmium were 1.1mg/l, 2.54mg/l and 19.5mg/l, respectively. For oysters mercury was the most toxic substance, and cadmium was the least toxic one. the medium lethal time (LT 50) value decreased gradually at higher concentration of heavy metals. The LT 50 of 2mg/l was found within 96 hours ofr copper, 104 hours for mercury and 121 hours for cadmium. The lethal threshold concentrations for 7 days were found to be about 1mg/l for mercury and copper, and 2mg/l for cadmium.

• 한국환경보건학회지
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• 제41권5호
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• pp.305-313
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• 2015

Objectives: The objective of this study is to identify toxicants causing acute toxicity in effluents from the aluminum rolling industry that violate the discharge limits in Korea. Methods: Whole effluent toxicity tests (WET) were conducted on effluent discharged from the aluminum rolling industry following the US EPA WET test methods. We collected effluent samples three times and evaluated acute toxicity by using Daphnia magna. We employed toxicity identification evaluation (TIE) procedures to identify toxicants causing toxicity in the effluent. Results: No specific chemical groups were identified in the seven different manipulations applied to the of wastewater effluent samples showing 1.3 toxic units (TU) according to the TIE phase I procedures. Water quality parameters for water hardness, electric conductivity and heavy metals (Mn) were 4,322 mg/l as $CaCO_3$, 11.39 mS/cm, and $5,551{\mu}g/l$, respectively. Considering water hardness and reference toxicity, high concentrations of Mn can be disqualified from the causative toxicants. Consequently, high ionic concentrations of $Na^+$(1,648 mg/l), $Ca^{2+}$(1,048 mg/l), $Mg^{2+}$(1,428 mg/l) and $SO_4{^{2-}}$(7,472 mg/l) were identified to be causative toxicants. Water hardness and electric conductivity exceed the $EC_{50}$ value obtained by biological toxicity tests using Daphnia magna. Conclusion: According to TIE procedures, high salt concentration is determined to be a major toxicant in the effluent of agro-industrial wastewater treatment plants receiving wastewater from the aluminum rolling industry.

• 한국환경복원기술학회지
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• 제14권2호
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• pp.107-115
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• 2011

The purpose of the study is to analyze the environmental characteristics of fish acute toxicity that is dependent on the harmfulness of ACQ (Alkaline Copper Quat)-Treated Wood and Oryzias latipes mortality in a comprehensive way, provide objective verification method on the eco-toxicity and environment-friendliness of landscaping materials and methods, and utilize it as a basic datum for evaluation criteria. The main results are summarized as follows : 1. As a result of analysis on the harmfulness characteristics, each experimental plot showed different values respectively. In particular, it has been found that in proportion to the volume of testing materials, COD and Cu increases at a constant rate, compared to the input water. In the plot C with three testing materials, COD increased 67 times more than that of the input water, and Cu increased up to 12.36mg/L. 2. In case of fish toxicity, plot C, B, A all showed a mortality rate of 100%, indicating that fish toxicity is strong. In particular, the mortality rate of each plot within the initial time of one and a half hour showed clearly, which suggests that the fish toxicity is influenced by the increased concentration of hazardous substances depending on the volume ratio of testing materials. 3. As a result of comparison and analysis on the harmfulness and fish toxicity, the harmfulness showed different values on each experimental plot but, we found that the changing rate of values of toxicity of COD and Cu is mutually similar to that of mortality in the initial hour according to the experiment of fish toxicity, which shows that COD and Cu are major factors to increase fish toxicity.

• 한국환경과학회지
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• 제20권11호
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• pp.1383-1394
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• 2011

Environmental impacts of suspended solids (SS) released in coastal area by dredging, reclamation and construction can cause serious damages to coastal habitats and benthic organisms. Acute toxicity tests (4-7 days) were conducted to identify the relationship between SS concentration and mortality of three marine benthic species; benthic copepod (Tigriopus japonicus) adult, Pacific abalone (Haliotis discus hannai) spat, and olive flounder (Paralichthys olivaceus) fry. Benthic copepod was the most sensitive to SS followed by olive flounder fry and Pacific abalone spat, with an $LC_{50}$ (lethal concentration of 50% mortality) value of 61.0 mg/L and LOEC (lowest observed effective concentration) value of 31.3 mg/L for benthic copepod. LOEC and 7 day-$LC_{50}$ for Pacific abalone spat were 500.0 mg/L and 1887.7 mg/L, and those for olive flounder fry were 125.0 mg/L and 156.9 mg/L, respectively. The tolerance limits of the test species to SS revealed the various concentration ranges of SS, which reflects the physiology and ecology of the test species. These results are very valuable for the determination of SS concentration of effluents released into the coastal area by dredging, reclamation and construction etc. Also, sharp increase of SS can cause long-term damages to the benthic and sessile fauna by blanketing of benthic substratum. These experimental procedures for marine bioassay and acute toxicity results can be a useful guideline for practical management planning of SS discharge into coastal area.

• 한국식품영양과학회지
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• 제36권5호
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• pp.534-539
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• 2007

본 연구는 김치로 분리한 우량 종균인 Leu. citreum GJ7의 급성독성을 시험하기 위하여 ICR 마우스에게 1회 Leu. citreum GJ7을 복강 또는 경구투여한 후 사망률, 체중의 변화, 일반 및 임상증상, 육안적 소견 등을 관찰하였다. 복강투여 후 24시간 관찰한 결과, 일부 Leu. citreum GJ7 투여군에서 부분적으로 사망례가 관찰은 되었으나 나머지 시험동물은 계속 생존하여 2,500 mg/kg까지는 평균치사량을 산출할 수 없었다. 또한 5,000 mg/kg을 14일 동안 경구투여하였을 경우에는 사망례가 없었으며, 특이한 임상증상도 관찰되지 않았다. 복강 혹은 경구투여한 후 마우스의 체중변화에 있어서도 대조군과 Leu. citreum GJ7 투여군 사이에 유의성 있는 차이는 보이지 않았으며, 생존동물의 부검결과에서도 내부 장기의 육안적 이상이 관찰되지 않았다. 따라서 Leu. citreum GJ7은 본 실험의 모든 조건에서 $LD_{50}$이 복강투여 시 2,500 mg/kg, 경구투여 시 5,000 mg/kg 이상인 저독성의 안전한 물질로 사료된다.

• 한국식품위생안전성학회지
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• 제33권3호
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• pp.214-219
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• 2018

본 연구는 세균과 진균에 대한 항균작용, 살충작용, 항아토피 활성, 항염증 효과, 혈압강하 및 스트레스 완화 효과 등이 있는 것으로 알려진 편백 정유를 이용하여, 마우스에서의 급성경구독성시험을 수행하였다. 편백 정유를 마우스에 0, 125, 250, 500, 1,000, 2,000 mg/kg body weight의 농도로 각각 1회 경구투여한 결과, 마우스 암 수 모두 2,000 mg/kg에서 모두 생존하였으며, 모든 투여군의 체중 및 모든 혈액학적 혈액생화학적 지표값들이 대조군과 비교하여 통계적으로 유의적인 차이를 보이지 않았다. 따라서 편백 정유의 마우스에서의 $LD_{50}$은 2,000 mg/kg body weight 이상으로 확인되었다.

• 생태와환경
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• 제39권4호통권118호
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• pp.419-423
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• 2006

본 연구에서는 국내 토착종인 왜물개 (Aphyocypris chinensis)을 사용하여 4가지 농약(diazinon, iprodione, fenpropathrin, myclobutanil)의 급성독성을 평가하기 위하여 지수식으로 독성실험을 실시하여 96-hr $LC_{50}$ 값과 95% 신뢰한계를 구하였다. 각 실험농약의 96-hr $LC_{50}$ 값을 비교하여 왜몰개에 대한 급성독성이 높은 순서를 정리한 결과는 Fenproparthrin (0.003 mg $L^{-1}$)>Myclobutanil (9.1 mg $L^{-1}$)>Diazinon (14.1 mg $L^{-1}$)>Iprodione (31.8 mg $L^{-1}$) 순으로 나타났다. 본 연구에서 사용된 4가지 농약에 대한 왜물개의 급성독성 값은 현재까지 보고된 다른 어종의 급성독성 값과 차이가 있었다. 그러므로 환경관리 및 규제목적으로 어류에 대한 급성독성실험 결과를 수질기준 또는 물질분류에 이용하기 위해서는 다양한 어류에 대한 급성독성 평가를 통하여 종합적 판단이 필요하다고 사료된다.