• 대한한의학방제학회지
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• 제29권2호
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• pp.93-103
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• 2021

Objectives : This study was conducted to evaluate the Intraocular pressure (IOP) and retina neuroprotective effect of Acer palmatum thumb. extract in glaucoma of DBA2/J mice vivo model. Methods : The amount of change in intraocular pressure(IOP) was measured every two weeks for 30 weeks in the DBA2/J glaucoma animal model. The increased IOP were regrouping into drug treatment groups. EW and EE (1, 2 mg/㎖)extract was eye drop administered twice per day for 8 weeks. After administration of the extract, IOP was measured every 1 week at a fixed time for 8 weeks, and protein expression levels and serological changes related to retinal function were investigated. Results : The DBA2/J mice were IOP increased as time dependent, resulting in damage to the retinal function protein related in glaucoma animal model. However, administration of extracts from Leaves of Acer palmatum thumb. prevented an increase IOP, increased for Brn3α, PKCα, and OPN1SW. Additionally, the experssion of Aterocyte maker, GFAP was decreased in DBA2/J mice. Conclusions : These results demonstrate that both IOP and age can be considered in studies using DBA2/J mice and suggest that the extracts from Leaves of Acer palmatum thumb. regulating of IOP and expression of proteins related to retinal function.

• Journal of Veterinary Science
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• 제23권4호
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• pp.25.1-25.14
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• 2022

Background: The commercially available Newcastle disease (ND) vaccines were developed based on Newcastle disease virus (NDV) isolates genetically divergent from field strains that can only prevent clinical disease, not shedding of virulent heterologous virus, highlighting the need to develop genotype-matched vaccines Objectives: This study examined the efficacy of the NDV genotype-matched vaccine, mIBS025 strain formulated in standard vaccine stabilizer, and in carboxymethyl sago starch-acid hydrogel (CMSS-AH) following vaccination via an eye drop (ED) and drinking water (DW). Methods: A challenge virus was prepared from a recent NDV isolated from ND vaccinated flock. Groups of specific-pathogen-free chickens were vaccinated with mIBS025 vaccine strain prepared in a standard vaccine stabilizer and CMSS-AH via ED and DW and then challenged with the UPM/NDV/IBS362/2016 strain. Results: Chickens vaccinated with CMSS-AH mIBS025 ED (group 2) developed the earliest and highest Hemagglutination Inhibition (HI) NDV antibody titer (8log₂) followed by standard mIBS025 ED (group 3) (7log₂) both conferred complete protection and drastically reduced virus shedding. By contrast, chickens vaccinated with standard mIBS025 DW (group 5) and CMSS-AH mIBS025 DW (group 4) developed low HI NDV antibody titers of 4log₂ and 3log₂, respectively, which correspondingly conferred only 50% and 60% protection and continuously shed the virulent virus via the oropharyngeal and cloacal routes until the end of the study at 14 dpc. Conclusions: The efficacy of mIBS025 vaccines prepared in a standard vaccine stabilizer or CMSS-AH was affected by the vaccination routes. The groups vaccinated via ED had better protective immunity than those vaccinated via DW.

• 핵의학기술
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• 제18권1호
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• pp.76-81
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• 2014

눈물길 조영검사 시 눈물기관 해부학적 구조의 다양성, 눈물길기형, 검사 중 발생하는 유루증과 같은 경우 전면상 외에 코 안으로의 배출을 좀 더 자세히 표현해낼 수 있으며, 유루증과 코 눈물관으로의 배출을 구별할 수 있는 방법의 필요성을 생각해 보았다. 이에 전면상 지연 촬영 외에 양측 안 와 사위상을 획득하는 방법의 유용성에 대해 알아 보고자 하였다. 2013년 1월부터 2013년 8월까지 눈물길폐쇄로 인한 유루증을 주소로 하는 78명의 환자를 대상으로 하였다. 평균나이는 $56.96{\pm}13.36$세였다. $^{99m}TcO4^-$ 3.7 MBq (0.1 mCi)을 $10{\mu}L$ 씩 마이크로피펫을 이용하여 양 안 하결막낭에 1-2방울 점안 후 1분 씩 20frame, 20분 간 동적 검사를 시행 하였다. 동적 검사 직후 양 안에서 코 안으로 배출이 확인되는 경우는 즉시 사위상을 획득하였고 어느 한쪽의 안 와라도 배출이 보이지 않는 경우 40분 뒤 전면상으로 확인 후 안 와 사 위상을 획득하였다. 검사 시 사용한 장비로는 Pin-hole Collimator를 장착한 Gamma Camera (Siemens Orbiter, Hoffman Estates, IL, USA)장비를 사용하였다. 실험대상 78건의 영상 중 전면상에서 코 안으로의 배출이 확인되었던 환자는 35명이었다. 그 중 양 안 모두에서 코 안으로 배출을 보인 환자는 15명이었고 양 안 8명, 좌 안 2명, 우 안 1명에서 사위상을 통해 보다 나은 배출 양상 관찰이 가능하였다. 좌 안 및 우 안에서 배출이 있었던 환자는 20명이었고 10명이 전면상에 비해 명확한 배출을 보여 주었다. 그 외 배출 가능성이 있는 환자는 13명이었으며 코 눈물관으로의 추적자이동이 보이지 않은 환자는 30명이었다. 기술통계 결과 총 35명 중 21명(60%)이 사위상 추가 촬영으로 전면상보다 뚜렷한 배출 양상을 나타내었다. 배출 감별유용성에 관한 Likert 5점 척도 blind test를 통해 사위상 획득이 전면상에서 자세히 보이지 않는 부분을 나타내 줌으로써 배출 유무 확인이나 배출 지연, 코 눈물관 폐쇄를 진단하는 데 도움이 된다고 응답하였다. 또한 유루증 발생시 코 눈물관으로의 배출과 피부로의 흘림을 구별할 때 사위상이 전면상에 비해 구별능이 높다고 응답하였다(전면상:$4.14{\pm}0.3$, 사위상:$4.55{\pm}0.4$). 눈물길 조영검사 시 양측 안 와 사위상을 전면상 이외에 추가적으로 획득한다면 전면상에서 충분히 보여주지 못하는 영역의 검사가 가능하여 코 눈물관 이후로의 배출 유무를 확인하고 피부에서 유루증의 흐름을 코 눈물관과 구별하는 데 용이하기에 판독의 진단능을 높일 수 있을 것이라 사료된다.

• 핵의학기술
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• 제14권2호
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• pp.26-32
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• 2010

핵의학 체내검사 업무 단계 별 작업종사자의 피폭선량을 측정 및 분석하여 환자 검사 및 업무효율 저하를 발생시키지 않는 범위 내에서 종사자의 피폭선량을 최소로 감소할 수 있는 방법을 알아보고자 하였다. 방사성동위원소를 이용한 핵의학 체내검사 업무는 방사성 동위원소 분배, 방사성동위원소 주사($^{99m}Tc$, $^{18}F$-FDG), 환자 안내 및 검사로 이루어진다. RadEye-G10 측정기기(Thermo SCIENTIFIC)를 이용하여 각 업무 단계 별 피폭선량을 측정 및 분석 하였다. 방사성동위원소를 환자에게 주사하는 과정에서 많은 피폭이 발생하므로 작업종사자의 피폭선량을 최소로 줄일 수 있도록 외부피폭 방어에 대한 교육과 방사성동위원소 주사 시 보호구를 착용하도록 하였으며 주사 전 검사에 대한 설명 및 주의사항을 교육하여 주사 후 환자와의 대면시간을 단축하여 피폭선량을 줄이도록 하였다. 방사성동위원소 주사 시 보호구 착용 유무에 따른 피폭선량과 주사 전 검사에 대한 설명 및 주의사항 교육 유무에 따른 피폭선량을 측정하였다. 총 피폭선량은 icrosoft office Excel 2007을 이용하여 그래프로 나타내었으며 피폭선량의 차이는 SPSS program 12.0을 이용하여 wilcoxon signed ranks test로 분석 하였다. 이 때 p값이 0.01 이하인 경우 통계적으로 유의 하다고 판단하였다. $^{99m}Tc$-DPD 20 mCi를 보호구를 착용하고 주사 시 피폭되는 선량은 보호구를 착용하지 않고 주사 시 피폭되는 선량보다 88% 감소하였으며 통계적으로 유의한 차이가 있었다 (p<0.01). $^{18}F$-FDG 10 mCi를 보호구를 착용하고 주사 시 피폭되는 선량은 보호구를 착용하지 않고 주사 시 피폭되는 선량보다 26% 감소하였으나 통계적으로 유의한 차이는 없었다(p>0.01). $^{99m}Tc$-DPD 20 mCi를 주사 전 검사에 대한 설명 및 주의사항 교육 시 피폭되는 선량은 주사 후 검사에 대한 설명 및 주의사항 교육 시 피폭되는 선량보다 63% 감소하였으며 통계적으로 유의한 차이가 있었다(p<0.01). $^{18}F$-FDG 10 mCi를 주사 전 검사에 대한 설명 및 주의사항 교육 시 피폭 되는 선량은 주사 후 검사에 대한 설명 및 주의사항 교육 시 피폭되는 선량보다 52% 감소하였으며 통계적으로 유의한 차이가 있었다(p<0.01). 방사성동위원소 $^{99m}Tc$을 이용하는 검사에서는 보호구 착용이 피폭선량을 줄이는데 더 효과적이고 $^{18}F$-FDG를 이용하는 검사에서는 주사 후 환자와의 대면시간을 단축하는 것이 피폭선량을 줄이는데 더 효과적이다. 그러므로 이러한 방사성동위원소의 특성에 따라 차폐 방안을 모색한다면 더욱 더 효과적이고 적극적인 방사선 차폐가 될 것으로 사료된다.

• 센서학회지
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• 제29권2호
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• pp.93-99
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• 2020

A colorimetric paper sensor was used to detect volatile nitrogen-containing compounds emitted from spoiled salmon filets to determine their freshness. The sensing mechanism was based on acid-base reactions between acidic pH-indicating dyes and basic volatile ammonia and amines. A sensing layer was simply fabricated by drop-casting a dye solution of bromocresol green (BCG) on a polyvinylidene fluoride substrate, and its color-change response was enhanced by optimizing the amounts of additive chemicals, such as polyethylene glycol, p-toluene sulfonic acid, and graphene oxide in the dye solution. To avoid the adverse effects of water vapor, both faces of the sensing layer were enclosed by using a polyethylene terephthalate film and a gas-permeable microporous polytetrafluoroethylene sheet, respectively. When exposed to basic gas analytes, the paper-like sensor distinctly exhibited a color change from initially yellow, then to green, and finally to blue due to the deprotonation of BCG via the Brønsted acid-base reaction. The use of ammonia analyte as a test gas confirmed that the sensing performance of the optimized sensor was reversible and excellent (detection time of < 15 min, sensitive naked-eye detection at 0.25 ppm, good selectivity to common volatile organic gases, and good stability against thermal stress). Finally, the coloration intensity of the sensor was quantified as a function of the storage time of the salmon filet at 28℃ to evaluate its usefulness in monitoring of the food freshness with the measurement of the total viable count (TVC) of microorganisms in the food. The TVC value increased from 3.2 × 10⁵ to 3.1 × 10⁹ cfu/g in 28 h and then became stable, whereas the sensor response abruptly changed in the first 8 h and slightly increased thereafter. This result suggests that the colorimetric response could be used as an indicator for evaluating the degree of decay of salmon induced by microorganisms.

• 대한수의학회지
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• 제40권1호
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• pp.110-116
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• 2000

Duck viral hepatitis is an acutic, highly infectious viral disease of young ducklings. The most practical means for controlling duck viral hepatitis is the vaccination of ducklings or of a breeding stock. We attempted to develop a vaccine strain of duck hepatitis virus (DHV) using a Korean isolate by serial chicken embryo passages. The propagation of DHV in chicken embryos was carried 140 passages. After the $50^{th}$ passage, of which the virus was non-pathogenic for ducklings, approximately every $20^{th}$ passage of the virus was tested for vaccinal efficacy. Both the $70^{th}$ and $90^{th}$ passage of the virus gave good protection against challenge infection to a DHV-DRL reference strain(type 1) and a virulent Korean isolate. The $110^{th}$, $125^{th}$ and $140^{th}$ passage of the virus were less protective than the $70^{th}$ and $90^{th}$ passage, which means that more than $110^{th}$ passage may lead to over-attenuation of the virus. Ducklings vaccinated with the chicken-embryo-adapted virus by oral, intramuscular or eye drop administration showed earlier resistance to challenge infection from 3 to 7 days postvaccination. Of the above methods, ducklings vaccinated intramuscularly presented the most rapid resistance against challenge. The minimum immune dose of the chicken-embryo-adapted virus in ducklings was also studied. Ducklings inoculated with a dose of $10^{2.0}\;ELD_{50}$ and below were not fully protected against challenge with a virulent DHV, showing a protection rate of 67% to 73%, but ducklings inoculated with a dose of $10^{3.0}\;ELD_{50}$ and over were completely protected. The virus yield of the chicken-embryo-adapted DHV was examined at 24hrs and 48hrs of the incubation time in the allantoic fluid, embryo head and embryo minus head of the embryonating egg. In all three components, the titer of the virus was higher at 48 hours than that at 24 hours after incubation. And the titer of the virus was higher in the embryo minus head, embryo head and the allantoic fluid, in order. Field trials for evaluating the efficacy of the attenuated DHV as a live vaccine were done in duck farms with about 25% mortality of flocks resulting from duck viral hepatitis. After the use of the experimental vaccine, the mortality due to duck viral hepatitis was dramatically reduced in the farms. These results indicated that the attenuated DHV using a Korean isolate could be a good candidate as a live vaccine strain of DHV in Korea.

• 대한한방소아과학회지
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• 제35권2호
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• pp.21-36
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• 2021

Objectives We aimed to understand etiology, pattern differentiation, treatment principle, and the role of selected herbs in the treatment of Korean herbal medicine for allergic conjunctivitis (AC) in children. Methods We searched relevant literature published up to February 20, 2021 through CNKI, using search formula of (SU= '結膜炎'+'conjunctivitis') AND (SU='儿童'+'小儿'+'少儿'+'幼年') AND (SU='治療'+'中医治療'+'中藥'+'中医藥'+'顆粒'+'胶囊'+'自擬'+'湯'+'丸'+'散'+'方'). Results Among 81 searched studies, 9 randomized controlled trials and 1 case report were selected and analyzed. In all studies included, the efficacy of herbal treatment for AC was confirmed, and there was no evidence that herbal medicine treatment has higher risk of developing side effects compared to conventional eye drop treatment. As an etiology, wind (風邪) was observed the most frequently, and Saposhnikoviae Radix (防風) and Schizonepetae Spica (荊芥) were in frequent use to dispel wind (祛風). As visceral pattern identification, spleen (脾) and lung (肺) were two important keywords, and spleen deficiency (脾虛), dampness-heat in the spleen and stomach (脾胃濕熱), lung qi deficiency (肺氣虛) were main pathologic mechanisms. Else, treatments related to liver (肝) and removing dampness-heat (濕熱) were mentioned next. Conclusions This study is significant in that AC in children, which has a lack of research compared to other allergic diseases, has been studied in the contents of Korean medicine and laid foundation that can be used as basic data in the actual clinical field. Based on this study, it is hoped that clinical data of Korean herbal medicine treatment for childhood AC will be further accumulated.