• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.1
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• pp.77-84
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• 2000

Although ferric sulfate has been proposed as an alternative to formocresol in pulpotomy treatment in primary teeth, it has been given little concern regarding its cytotoxicity and mutagenicity. In the present study, we assessed the in vitro genotoxic effect of a ferric sulfate on human gingival fibroblast cell line (HGF-1). DNA damage was evaluated using comet assay (single cell alkaline gel electrophoresis) and obtained the results as follows: 1. A dose-response relationship was found between ferric sulfate concentrations (0 to 5mM) and DNA damages. 2. Above the concentration of 0.1mM, DNA damage was significantly increased than those of the control (p<0.05). 2. At the fixed concentration of 0.05mM, no significant difference was found between exposure time and DNA damage. These findings suggest that ferric sulfate as a pulpotomy agent can induce DNA damage in human gingival fibroblasts.

• Journal of Oral Medicine and Pain
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• v.36 no.2
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• pp.99-105
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• 2011

The vermilion zone of the lips is mucocutaneous junction between the skin and the oral mucosa of lips. Diseases of the vermilion zone may be related to a local or systemic condition, and can be manifestation of a systemic disease. In this cases, we introduced patients with hemorrhagic, ulcerative lesions on the vermilion zone and reported plasma cell cheilitis and lesion of the vermilion zone related to Stevens-Johnson syndrome(SJS).

• Korean Journal of Veterinary Research
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• v.13 no.2
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• pp.165-170
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• 1973

1972년 여름, 사관생도(士官生徒) 승마교육용(乘馬敎育用)으로 육군사관학교(陸軍士官學校) 군마대(軍馬隊)에서 사육(飼育)하고 있는 승마용(乘馬用) 마필(馬匹)(오스트레일리아 및 일본산(日本産))과, 군용마(軍用馬)로서의 개발시험(改發試驗)에 공시중(供試中)인 제주도산(濟州道産) 재내마필(在來馬匹)에 발생(發生)한 14예(例)의 피부사상균성(皮膚絲狀菌性) 윤선(輪癬)을 대상(對象)으로 그 치료시험(治療試驗)을 실시(實施)하였던 바, 다음과 같은 결론(結論)을 얻었다. 임상증례(臨床症例) 관찰(觀察) (1) 초기증상(初期症狀) 발현(發現)은 군마고유번호(軍馬固有番號) 15번(番), 마명(馬名) 거상(巨象)(원명(原名) Shane)의 이마 및 이근부(耳根部) 견부(肩部)에 직경(直徑) 3cm 정도(程度)의 원형(圓型) 병소(病巢)가 나타났으며, 곧 이어 다른 마필(病巢)에 산발적(散發的)으로 발생(發生)했다. 발생률(發生率)은 31.8%(군마(軍馬) 44%, 조랑말 15.8%)로서 지난해 군부대(軍部隊) 목장(牧場)에서 집단발생(集團發生)했던 Bovine Ringworm의 발생률(發生率)(56.4%)보다 낮았다. (2) 증상(症狀)은 원형발진(圓型發疹) 및 양감(痒感), 가피형성(痂皮形成), 피모탈낙(皮毛脫落), 농포형성(膿疱形成) 및 신모발생등(新毛發生等)의 순(順)으로 진행(進行)했으며 환축(患畜)과 접촉(接觸)하는 사람에게도 감염(感染)하는 인축공통전염병(人畜共通傳染病)의 일종(一種)이었다. (3) 품종(品種) 및 성별(性別), 연령에 따른 유의성(有意性)은 인정(認定)할 수 없었다. 치료시험(治療試驗) 결과(結果) (1) 본병(本病)은 Ichthammol이나 Undecylenic Acid 처리(處理)에 있어서 치료효과(治療效果)를 나타냈다. (2) 상기(上記)한 항사상균제 처리(處理)와 동시(同時)에 Hydrccortisone의 보조요법(補助療法)을 실시(實施)하였을때, 약효(藥效)가 빨리 나타나고 치료기일(治療期日)도 단축(短縮)되었다. (3) 본증(本症)은 조기(早期)에 발견(發見) 치료(治療)해야하며 일반적(一般的)으로 완치(完治)하는데 장기간(長期間)을 요(要)하였다.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.03a
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• pp.61-61
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• 2011

지구 온난화로 인해 환경파괴, 병원성 세균 감염 등에 의한 각종 질병과 아토피 피부염 등 수없이 많은 요소들에서 우리 몸을 보호하기 위하여 친환경 소재의 용품들이 각광 받고 있다. 이중에서도 키토산과 칼슘알지네이트는 천연재료로써 이미 다른 분야에서 응용되어 사용되고 있으며, 이 두 가지 천연재료를 두 층으로 면섬유에 코팅시킨 CCAC섬유를 제조하였다. CCAC섬유와 키토산이 코팅된 면섬유, 칼슘알지네이트가 코팅된 면섬유, 미처리 면섬유의 총 4가지 섬유에 체액, 증류수, 생리식염수의 각각의 조건에서 흡습량, 흡습시간을 측정하여 비교하고, 수분율과 함수율을 측정하고, 접촉각을 Contact angle system OCA20을 이용하여 측정하였다. CCAC섬유의 키토산 부착 함량을 알아보기 위하여 정량적인 방법으로 add-on율을 이용하여 확인하고, 정성적인 방법으로 원소분석기(Elemental Analyzer, FLASH 1112)를 이용하여 측정하였다. 칼슘알지네이트의 함량 분석은 EDS(EX-250, HORIBA, Japan)를 이용하여 측정하고, 직물의 표면과 단면의 형태는 주사전자현미경(S-4100, Hitachi Co., Japan)으로 ${\times}100$, ${\times}1000$ 배율로 측정하여 단면과 표면 상태를 확인하고, 물리적인 특성은 KES-FB system 을 통하여 확인 하였다.

• Journal of the Korean Arthroscopy Society
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• v.3 no.1
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• pp.35-39
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• 1999

The authors introduce an operative technique which is simple and effective for the treatment of the large prepatellar bursitis, avoiding problems by the conventional open technique such as tender scar, infection and recurrence. We treated three cases of the large refractory prepatellar bursitis caused by acute direct trauma. Bursectomies were performed by using an arthroscope and percutaneous multiple sutures were applied to the overlying skin with mattress fashion. There were no complications after treatment over one year follow-up. We suggest that this technique is very useful, greatly minimizes the chance of recurrence and reduces the possibility of post-operative infection.

• Convergence Security Journal
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• v.12 no.4
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• pp.3-8
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• 2012

Smartphones have all the recent technology integration and NFC (Near Field Communication) Technology is one of them and become an essential these days. Despite using smartphones with NFC technology widely, not many security vulnerabilities have been discovered. This paper attempts to identify characteristics and various services in NFC technology, and to present a wide range of security vulnerabilities, prevention, and policies especially in NFC Contactless technology. We describe a security vulnerability and an possible threat based on human vulnerability and traditional malware distribution technic using Peer-to-Peer network on NFC-Enabled smartphones. The vulnerability is as follows: An attacker creates a NFC tag for distributing his or her malicious code to unspecified individuals and apply to hidden spot near by NFC reader in public transport like subway system. The tag will direct smartphone users to a certain website and automatically downloads malicious codes into their smartphones. The infected devices actually help to spread malicious code using P2P mode and finally as traditional DDoS attack, a certain target will be attacked by them at scheduled time.

• Journal of Practical Engineering Education
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• v.13 no.2
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• pp.301-304
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• 2021

In this study, we developed a module that can perform two functions at the same time through interworking between a personal recognition module and a heat detection module in the era of COVID-19. This can simultaneously solve the problem of compatibility of the personal recognition module that occurs in the existing system and the problem of secondary infection that can occur during congestion due to the separate implementation of heat detection. Therefore, in this study, NFC and Bluetooth motherboards were developed, and an array-type non-contact temperature sensor was applied to detect heat. The developed system is expected to be able to realize both access control of floating population and effective quarantine at the same time in public institutions or private companies that require AI automated access control. In addition, it is judged that it is possible to link the embedded programming and web programming implementation method using the module of the development system to the educational program.

• Journal of the Korea Convergence Society
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• v.12 no.4
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• pp.201-206
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• 2021

Damage to the highly pathogenic avian influenza virus(H5N1) continues to increase, but there is a lack of antiviral research. In this study, we analyze antiviral properties on H5N1 by coating Cu/TiO2 photocatalyst on polyethylene films. The specimen was manufactured a photocatalyst master batch and coated both sides of the 3-layer polyethylene fabric at 280℃ from the extrusion coating machine. The results showed a 99.9% decrease in the Staphylococcus aureus and Escherichia coli. In particular, H5N1 type highly pathogenic avian influenza viruses, which is capable of human infection, has been found to decrease 99.9% within five minutes of contact with Cu/TiO2 films. Antibacterial effects of films coated with photocatalyst are known, but this study also confirmed the antiviral effects.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.5
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• pp.981-990
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• 2021

Corona 19 quarantine is often not implemented at degraded bus stops. We conducted this study to improve these problems. The inside and outside of the shelter can be sterilized with UV photocatalyst coating to maintain a hygienic and clean shelter, and passengers can breathe smoothly by reducing carbon dioxide in the shelter using CO₂ sensors and fans. It is also expected that the body temperature can be measured using a body temperature sensor to prevent more than 20% of the spread of the coronavirus in the shelter by isolating suspected coronavirus patients in the first place. When the temperature measurement distance was less than 10cm, the accuracy of the temperature measurement was 98.9%. You can communicate your intention to ride safely and clearly without contacting the bus driver by using a ride bell that uses wireless communication inside the shelter.

• Pediatric Infection and Vaccine
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• v.27 no.3
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• pp.205-209
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• 2020

Korea was verified as a measles-free country by the World Health Organization in 2014; however, some imported measles cases and related outbreaks were reported. As the incidence of wild-type measles decreases in measles-free countries, the proportion of vaccine-associated measles is increasing. Wild-type measles is highly contagious and requires follow-up and management of the contacts, whereas vaccine-related measles is not contagious and does not require follow-up intervention. Therefore, measles genotyping should be performed to reliably distinguish between them in suspected patients. Two patients with vaccine-associated measles were confirmed through genotyping at Daegu Fatima Hospital. In Korea, there are only a few reports of vaccine-associated measles confirmed through genotyping; thus, we report recent vaccine-associated measles cases, emphasizing the need for genotyping.