• Animal Bioscience
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• 제34권2호
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• pp.192-197
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• 2021

Objective: The present study evaluated the preservation of ram semen at 0℃ using soybean lecithin with a Tris-fructose extender. Methods: Semen was collected by artificial vagina ejaculation from six rams with proven fertility. High quality ejaculates were diluted by soybean lecithin (0.25%, 0.5%, 0.75%, 1.0%, 1.25%) using Tris-fructose extender and control (Tris-fructose egg yolk extender), respectively. The ejaculates were diluted to a concentration of 5×108 sperm/mL, followed by cooling to 0℃ in 90 min and maintaining the temperature for 12 days. The diluted semen samples were examined and recorded for sperm progressive motility, acrosome integrity at 0, 24, 72, 144, 216, 288 h, respectively. Two hundred and twenty-three ewes were inseminated for 216 h with optimal soybean lecithin concentrated semen or control via trans-cervical insemination. Results: The results showed that there were no differences in sperm progressive motility at 0, 24, 72, and 144 h (p>0.05). After 216 h, the sperm progressive motility in the control group and 0.5% concentration groups was significantly higher when compared to 0.25% concentration (p<0.05). The 0.5% concentration group demonstrated the highest survival rate and had no difference with the control group (p>0.05). At 216 h, the sperm progressive motility of all groups was still above 50%. The acrosome integrity of all groups was decreased with prolongation of storage time, but there was no difference at each time point (p>0.05). There was no significant difference in the lambing rate and pregnancy rate between the 0.5% concentration group and the control group (p>0.05). Conclusion: These results suggest that ram sperm is capable of fertilization after preservation at 0℃ with 0.5% of soybean lecithin in Tris-based extender substituted for egg yolk and produce normal offspring after insemination.

• 대한임상독성학회지
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• 제18권2호
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• pp.130-135
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• 2020

Purpose: Taking large amounts of glyphosate is life-threatening, but the amounts of glyphosate taken by patients for suicide are not known precisely. The purpose of this study was to find the predictors of large amounts of glyphosate ingestion. Methods: This retrospective study analyzed patients presenting to an emergency department with glyphosate intoxication between 2010 and 2019, in a single tertiary hospital. The variables associated with the intake amounts were investigated. The parameters were analyzed by multivariate variate logistic regression analyses and the receiver operating characteristic (ROC) curve. Results: Of the 28 patients with glyphosate intoxication, 15 (53.6%) were in the large amounts group. Univariate analysis showed that metabolic acidosis, lactic acid, and corrected QT (QTc) interval were significant factors. In contrast, multivariate analysis presented the QTc interval as the only independent factor with intoxication from large amounts of glyphosate. (odds ratio, 95% confidence interval: 1.073, 1.011-1.139; p=0.020) The area under the ROC curve of the QTc interval was 0.838. Conclusion: The QTc interval is associated significantly with patients who visit the emergency department after being intoxicated by large amounts of glyphosate. These conclusions will help in the initial triage of patients with glyphosate intoxication.

• 대한한의학회지
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• 제42권3호
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• pp.44-55
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• 2021

Objectives: As the use of herbal medicinal products (HMPs) increases worldwide, systematic verification of the safety of HMPs is required. The induction of cardiotoxicity is one of the major factors in post-approval withdrawal of medicinal products, and drug-induced cardiotoxicity assessment is emerging as an important step in drug development. In the present study, we evaluated human ether-à-go-go-related gene (hERG) potassium channel-related cardiotoxicity to predict the risk of cardiac arrhythmia in thirteen herbal medicines known to have cardiac toxicity. Methods: We measured the inhibition rate of hERG potassium channel activity of 13 medicinal herbal extracts in hERG-expressing HEK 293 cells using an automated patch-clamping system. Quinidine was used as a positive control for inhibition of hERG activity. Results: Extracts of Evodiae Fructus, Strychni Semen, and Corydalis Tuber potently inhibited the activity of hERG, and IC₅₀ values were 3.158, 19.87, and 41.26 ㎍/mL, respectively. Cnidi Fructus, Ephedra Herba, Lithospermi Radix, Polygoni Multiflori Radix, Visci Ramulus et Folium, Asiasari Radix et Rhizoma, and Scolopendra weakly inhibited hERG activity, and the IC₅₀ value for each herbal medicine was more than 400 ㎍/mL. Aconiti Kusnezoffii Tuber and two types of Aconiti Lateralis Radix Preparata (Po and Yeom) had weak inhibitory activity against hERG, and the IC₅₀ values were more than 700 ㎍/mL. The IC₅₀ value of quinidine against hERG was 1.021 𝜇M. Conclusion: Evodiae Fructus, Strychni Semen, and Corydalis Tuber acted as potent inhibitors against hERG. These herbal medicines may cause cardiac arrhythmia through QT prolongation, so care should be taken when taking them.

• 한국응용곤충학회지
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• 제61권1호
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• pp.117-128
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• 2022

본 연구는 피레스로이드계 살충제인 퍼메트린이 Heliothis virescens의 중추신경세포의 나트륨채널에 어떻게 작용하는 가를 전기생리학적으로 관찰하였다. 퍼메트린은 나트륨채널의 꼬리전류(I_Na-tail)를 지속적으로 증가시켰으며 이러한 비정상적인 나트륨 전류증가가 나방류의 신경계에 과도한 흥분을 일으겨 살충작용을 하는 것으로 생각된다. 이러한 살충작용은 전갈독과 함께 사용했을때 약 8배의 증가가 있었음을 확인하였다. 전갈독이 살충제의 독성을 강화하는 분자생리학적 기전연구가 계속되면 해충방제에 많은 기여를 할 것으로 생각된다.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.425-432
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• 2020

In order to improve the sustainability and smart construction, it is discussed arguably that developing and applying consistent "standard model" to plan business, design, construct and operate a building is considered to be one of the effective and efficient approach. The scope of this article is to examine, from the international developer's perspective, the "standard model" approach of a hotel brand to building projects in the UK, and also to explore potential role of project team to mitigate any local difference at the project level. These projects are developed by the same developer adopting the same business plan, design and operation to each project. In order to clarify the actual and likely difference in construction results, reference is also made to those building projects located in other geographical markets including Japan, Germany and USA, and focus is given on the analysis of its programme and cost. Principle findings are that there exists geographical difference especially in environmental and planning system, and that major local difference is found at least in the programme at the design stage. In contrast, the difference in the building cost itself may not be necessarily considered major if currency exchange rate being taken into account appropriately. It is also observed that there were cases where any difference in the programme was mitigated by taking different approach to procuring and defining roles of management and professional team at the project level. In conclusion, from the international developer's perspective, the geographical difference of the "construction system" surrounding building projects can typically lead to major prolongation of programme, however, these different construction results could be mitigated at least to a certain extent by introducing appropriate changes to the role of project team.

• Journal of Digestive Cancer Research
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• 제1권1호
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• pp.6-16
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• 2013

식생활의 서구화와 대장암 검진의 증가로 인하여 국내의 대장암 유병률은 지속적으로 증가하고 있으며, 최근 보고에 의하면 남자에서는 종양 발생률 2위, 여자에서는 종양 발생률의 3위를 차지하고 있다. 비록 대장내시경이 대장암의 진단과 선별검사에 아주 효과적인 방법이지만, 여전히 대장암의 20-25%는 이미 진단 당시에 전이를 동반하고 있는 것으로 되어 있다. 최근 10년 동안 이러한 전이성대장암의 고식적인 치료로 irinotecan과 oxaliplatin 등의 약제들의 개발과 이들의 다양한 조합에 관련된 연구들이 보고되어 왔으며, 분자생물학적인 발전에 힘입은 표적 치료제의 개발과 이에 대한 다양한 연구들은 향후에도 진행성대장암 환자들의 종양 반응률과 생존기간을 증가시킬 것으로 기대된다.

• 산업진흥연구
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• 제8권4호
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• pp.241-250
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• 2023

가출, 미아, 이유 없는 실종사건 수사에 있어 탐정의 실종사건 조사업무 효율성 강화에 초점을 맞춘다. 실종사건은 사회적 안전과 개인의 안녕에 직접적인 영향을 미치는 문제라고 본다. 연구는 다음과 같은 구조로 이루어져 있다. 서론에서는 연구의 필요성, 범위, 방법론이 제시된다. 다음은 실종사건의 정의, 원인, 유형과 실태에 대하여 분석한다. 실종사건 처리과정의 문제점에서는 초기 대응과정, 신고 이후의 관련기관 대응의 문제점, 사건장기화에 따른 문제점, 법률적 제한으로 인한 문제점 등에 대하여 분석한다. 실종사건에 대한 탐정의 업무효율성 제고 방안에서는 공익적 조사 네트워크 활성화, 실종사건 조사관련 역량강화, 전문공익탐정 인증제도, 탐정활동 예외조항 마련에 대하여 논의한다. 결론에서는 실종사건을 전문으로 하는 공익탐정에 대하여 활동에 대하여 필요한 부분이 무엇일지에 대하여 제시한다.

• Journal of Ginseng Research
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• 제48권3호
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• pp.245-252
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• 2024

Ginseng is a traditional herbal medicine used for prevention and treatment of various diseases as a tonic. Recent scientific cohort studies on life prolongation with ginseng consumption support this record, as those who consumed ginseng for more than 5 years had reduced mortality and cognitive decline compared to those who did not. Clinical studies have also shown that acute or long-term intake of ginseng total extract improves acute working memory performance or cognitive function in healthy individuals and those with subjective memory impairment (SMI), mild cognitive impairment (MCI), or early Alzheimer's disease (AD) dementia who are taking AD medication(s). Ginseng contains various components ranging from classical ginsenosides and polysaccharides to more recently described gintonin. However, it is unclear which ginseng component(s) might be the main candidate that contribute to memory or cognitive improvements or prevent cognitive decline in older individuals. This review describes recent clinical contributors to ginseng components in clinical tests and introduces emerging evidence that ginseng components could be novel candidates for cognitive improvement in older individuals, as ginseng components improve SMI cognition and exhibits add-on effects when coadministered with early AD dementia drugs. The mechanism behind the beneficial effects of ginseng components and how it improves cognition are presented. Additionally, this review shows how ginseng components can contribute to SMI, MCI, or early AD dementia when used as a supplementary food and/or medicine, and proposes a novel combination therapy of current AD medicines with ginseng component(s).

• Annals of Occupational and Environmental Medicine
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• 제35권
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• pp.34.1-34.8
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• 2023

Background: Hydrogen sulfide is a toxic substance that humans can be exposed to occupationally, and cases of hydrogen sulfide poisoning of workers in industrial sites are commonly reported. However, there have been no cases of poisoning of the public due to an unauthorized discharge of wastewater, so it is important to describe this incident. Case presentation: In a small village in Jeollanam-do, Republic of Korea, accounts of a terrible stench had been reported. A 26-year-old man who lived and worked in a foul-smelling area was taken to the emergency room with a headache, dizziness, nausea, and repeated syncope. A subsequent police and Ministry of Environment investigation determined that the cause of the stench was the unauthorized discharge of 9 tons of wastewater containing hydrogen sulfide through a stormwater pipe while the villagers were sleeping. The patient had no previous medical history or experience of symptoms. Leukocytes and cardiac markers were elevated, an electrocardiogram indicated biatrial enlargement, left ventricular hypertrophy, and corrected QT interval prolongation. Myocardial hypertrophy was detected on a chest computed tomography scan, and hypertrophic cardiomyopathy was confirmed on echocardiography. After hospitalization, cardiac marker concentrations declined, symptoms improved, and the patient was discharged after 7 days of hospitalization. There was no recurrence of symptoms after discharge. Conclusions: We suspect that previously unrecognized heart disease manifested or was aggravated in this patient due to exposure to hydrogen sulfide. Attention should be paid to the possibility of unauthorized discharge of hydrogen sulfide, etc., in occasional local incidents and damage to public health. In the event of such an accident, it is necessary to have government guidelines in place to investigate health impact and follow-up clinical management of exposed residents.

• Tuberculosis and Respiratory Diseases
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• 제51권4호
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• pp.325-333
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• 2001

연구배경 : 폐결핵의 치료경과 중에 원활하게 치효에 성공하는 예는 대개 도말이 1~2개월 먼저 음전하고 그 후에 배양도 음전하며 그 후 계속해서 음성상태를 유지한다. 그런데, 배양이 도말보다 먼저 음전되는 도말양성 배양음성 현상을 임상에서 볼 수 있고, 이런 예 중에서도 흔하지는 않으나 특히, 배양은 치료개시 후 4개월 이전에 음전되었더라도 도말이 치료개시 후 6개월을 초과하여 지속적인 양성을 보이는 경우에는 임상적으로 치료실패여부 및 약제변경여부를 판단하는데 어려움이 있다. 이에 본 연구는 일차 항결핵제로 치료개시 후 6개월을 초과하여 지속적인 도말양성 배양음성 현상을 보이는 예 중에 일차 항결핵제로 치료종결한 예를 대상으로 임상적 특성, 치료종결 후의 임상성적 그리고 문헌고찰과 함께 보고하여 임상 진료에 참고가 되고자 하였다. 방 법 : 국립마산결핵병원에서 1995년 1월부터 2000년 12월 사이에 치료개시 후 6개월을 초과하여 지속적인 도말양성 배양음성 현상을 보였고, 일차 항결핵제로 치료종결된 21예를 대상으로 전체환자의 흉부방사선 소견을 비롯한 임상적 특성과 치료종결 후 재발율을 포함한 임상 성적을 조사하고, 재발군과 비재발군으로 분류하여 각 군의 임상적 특성의 차이가 있는지를 확인하였다. 그리고 투약기간의 연장여부, 내성약제 수, 과거력 수, 흉부 방사선 소견상 병변의 크기에 따른 재발율을 비교하고 각각의 변수가 재발에 영향을 주는지를 확인하였다. 결 과 : 전체 대상 환자는 총 21예로 남자가 17예, 여자가 4예 였고, 20세부터 60세까지의 연령분포를 보였으며, 평균 나이는 44.2세 였다. 평균 내성 약제 수는 1제였다. 사용한 항결핵제는 INH, RFP, EMB, PZA 네가지 약제에 SM이나 KM이 첨가된 경우가 6예 있었고 INH, RFP, EMB 세 가지 약제만으로 처음부터 투약된 경우가 1예 있었다. 평균 13.3개월의 투약을 하였다. 배양검사상 대상 환자 모두 3.1개월 이내에 음전되었으며, 투약기간 동안 계속하여 도말검사에서 양성을 보인 3예를 제외한 18예의 도말검사상 평균 음전기간은 9.5개월 이었다. 흉부 방사선 소견상 1예를 제외한 20예에서 공동성 병변을 보였고, 확장병변이 13예(61.9%)로 가장 많았고, 중등병변이 7예(33.3%) 였으며, 국소병변이 1예 있었다. 치료개시 후 20~24주 경의 흉부 방사선 사진과 치료 개시 때의 사진을 비교한 결과 모든 예에서 호전을 보였다. 치료종결 후 평균 15.2개월의 추적관찰 기간 중 4예의 재발이 있어 재발율은 19% 였으며, 재발의 시기는 모두 치료종결 후 3개월에서 4개월 사이에 발생되어 치료 종결 후 재발시기는 평균 14.1주 였다. 14예의 신환 중 1예의 재발이 있어 재발율이 7.1%였고, 두 번째 치료를 하는 4예에서는 재발이 없었고, 세 번째, 네 번째, 다섯 번째 치료를 하는 나머지 3예는 모두 재발하여 과거력의 수에 따른 재발율은 통계적으로 유의한 차이를 보였다(p<0.01). 재발군 1예에서 4.3개월의 투약기간 연장이 있었고, 비재발군 17예 중 11예에서 평균 4.5개월의 투약기간이 연장되었으나 투약기간의 연장여부가 재발에 영향이 없는 것으로 나타났다(odds ratio, 95% 신뢰구간 0.18, 2.15). 결 론 : 투약 개시 후 6개월올 초과하는 도말양성 배양음성 현상은, 의사가 지속적인 도말양성을 치료실패로 잘못 해석하거나 부적절한 치료처방을 할 가능성이 있으므로, 지속적인 객담 도말양성 배양음성 현상의 임상적 중요성을 인식하는 것이 중요하겠으며, 투약 20~24주의 방사선학적 호전을 근거로 일차 항결핵제를 유지하고자 하는 경우에는 투약기간의 연장은 필요치 않으며, 과거력이 2회 이상인 경우에는 재발에 대한 세심한 관심이 있어야 한다.