연령증가에 따른 심상유두의 변화

임희순,김병국,정성수 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

Background : The purpose of this study was to investigate whether there were any changes in fungiform papilla with advancing age. Being senile, patients with tongue disease have tended to be increased in prevalence, they will require medical care to improve the quality of life. Methods : The ninty-seven subjects (71 males and 26 females) were included for the study and they are categorized into 7 age groups (0-9, 10-19, 20-29, 30-39, 40-49, 50-59, and above 60 age group). Specimens were obtained from autopsy. 0.25㎠ sized tissue was taken from the tip of the tongue and midlateral region. The number of fungiform papilla in the tip of tongue and midlateral region were counted using an darkfield Quebeg colony counter. After hematoxyline-eosin staining, fungiform papilla, circumvallate papilla were observed with light microscopy. By using scanning electron microscope, the surface of the fungiform papilla was observed. Results : There was no change of the number of fungiform pailla in the area tip of tongue and midlateral region with age. Fungifrom pailla in dorsal surface of tongue transformed hemispheric form to cuboidal form with aging. Tongue fissures were found above twenties. At the light microscopic examination, squamous metaplasia, epithelial hyperplasia, keratohyaline granules with aging were examined. For the scanning electron microscopic examination, outline of fungiform papilla was circular, superficial surface in fungifrom papilla was smooth ; only a few desquamating cells were seen. With aging microplica, microbiae colony, complex of kerainized cells and increase in depth of keratin layer were noted. The superficial cells that had pitted in appearance and cell boundaries are overlapped, also showed the irregular pattern with aging, but there was no significant dirrerence between both sexes. Conclusions ; The number of fungiform papilla was not decreased by aging, its general morphology are maintained even in old age. Any age-relative differences in taste behavior could not be attributed to degenerative changes in fungiform papilla.

전계 발광 소자용 새로운 형광체 CaSiN_2 : Eu의 발광 특성 Eu Phosphors for Thin-Film Electroluminescent(TFEL) Devices

임성규,이순석 단국대학교 1998 論文集 Vol.32 No.-

The CaSiN_2 : Eu phosphor was tested as a possible material for thin - film electroluminescent (TFEL) device application. Ca_3N_2, Si_3N_4 and EuF_3 powders were mixed and fired for two hours under N_2 and H_2 environment at 1400℃ to synthesize CaSiN_2 : Eu phosphor. Photoluminescence characteristics of the synthesized phosphors were measured and compared with the electroluminescent characteristics of the CaSiN_2 : Eu TFEL devices. Electrical characteristics of the TFEL evices were also measured.

농흉과 종격동염이 합병된 viridans streptococcus에 의한 인후농양 1예

임상현,유진홍,권순석,김연식,신완식,강문원,정명희 대한화학요법학회 1997 대한화학요법학회지 Vol.15 No.2

최근 저자들은 viridans streptococcus에 의한 인후농약으로 인하여 발생한 종격동염 및 농흉을 보인 47세 여자 환자를 적절한 배농과 항생제로 치료한 국내 최초의 1예를 치험하였기에 문헌 고찰과 함께 보고하는 바이다. Since the antibiotic era, retropharyngeal abscess became a rare disease entity nowadays. But it may often progress to lethal complications involving vital structure if diagnosis or treatment is delayed. We experienced a case of empyema and mediastinitis complicating retropharyngeal abscess caused by viridans streptococcus in a 47-year-old female patient with diabetes mellitus. She was successfully treated with appropriate antibiotic therapy combined with percutaneous abscess drainage. To our knowledge, such a complication of retropharyngeal abscess has not been reported in Korea yet and we present this unusual case herein followed by a review of the related literature.

치아 우식부의 기계화학적 제거 효과에 대한 연구

임순빈,최경규,박상진 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.3

Mechanical removals in decayed teeth have been performed using drill and sharp hand instruments. These methods have some disadvantages such as pain, local anesthesia and overextended cavities Therefore chemo-mechanical excavation of dentin carious lesions has been introduced. The purpose of this study was to evaluate the efficacy of traditional mechanical methods using burs and chemo-mechanical methods (Carisolv) of caries dentin. Mechanical caries removal was carried with low speed round bur Chemo-mechanical caries excavation was performed with Carisolv (Medi-team), using the Carisolv hand instruments. The mean time to remove caries with two different methods was evaluated and the data analyzed with SPSS software (ver 11.5) by t-test (p < 0.05). For histomorphometry of caries removal were also carried with mechanical or chemo-mechanical (Carisolv) methods from 20 extracted caries permanent molars. Complete caries removal was verified with a #23 sharp explorers, Caries Detector (Kuraray Co. Japan), and standard apical radiography. 1. Chemo-mechanical method was taken more times than mechanical method (1.5 fold) (p < 0.05) 2. Excavation for caries took more time for molar lesion than premolar lesion, and the least time was taken to remove the caries in incisor lesion (p < 0.05). 3. There were no significant differences to remove the caries between the maxilla and mandible (p > 0.05). 4. The remaining carious dentin was detected after the ckemo-mechanical removal of the carious dentin, and no smear layer were seen after the mechanical and chemo-mechanical removal of the carious dentin. 본 연구는 우식의 기계적 제거와 기계화학적 제거의 효과를 비교, 평가하고자 하였으며, 기계적 제거방법은 저속의 round bur로, 기계 화학적 제거 방법은 Carisolv로 우식을 제거한 후, 잔존 우식을 확인하여 소요시간을 측정하였고, 또 실험실에서 발치한 우식 대구치 20개를 위 두 가지 방법으로 우식을 제거 후, Villanueva bone stain액으로 염색하고 표본을 제작 후 관찰하여 다음의 결론을 얻었다; 1.우식제거에 평균소요시간은 기계화학적 제거가 기계적인 제거보다 1.5배 더 길게 나타났다 (P < 0.05). 2, 우식제거에 평균소요시간은 소구치보다 대구치에서 더 길었고, 전치에서 가장 적은것으로 나타났다 (P < 0.05) 3. 상 · 하악에서는 차이가 없었다 (P > 0.05) 4. 기계화학적 방법으로 우식 상아질을 제거 시 잔존 우식 상아질이 관찰되었으며 두 방법 모두 우식 상아질을 제거한 표면에서는 도말층을 관찰할 수 없었다.

Comb 형 전극구조를 갖는 AC 플라즈마 디스플레이 패널의 전기, 광학적 특성

임성규,장호정,김동수,이순석 단국대학교 1999 論文集 Vol.34 No.-

The electrical and optical characteristics of comb type AC-PDP fabricated by the screen printing method were measured. The charge-voltage (Q-V), capacitance-voltage(C-V) and current-voltage (I-V) characteristics were also measured. The Q-V curve showed the firing voltage and transferred conduction charges and wall charges. The capacitance charge due to the charge of applied voltage was also observed from the C-V curve and it was shown that the air gap could not be considered 100% shorted during the discharge. It can be concluded that the increase of the discharge space by the comb type electrode structure reduces the firing voltage and the internal physical characteristics of the AC PDP cell can be understood by measuring various electrical characteristics.

내부점 선형계획법에서의 최적기저 추출방법의 구현

임성묵,박순달 한국경영과학회 2000 經營 科學 Vol.17 No.2

In this study, we deals with the implementation of an optimal basis identification procedure for interior point methods, Our implementation is based on Meglddo's strongly polynomial algorithm applied to Andersen and Ye's approximate LP construction. Several techniques are explained such as the used of effective indicator for obtaining optimal partition when constructing the approximate LP, the efficient implementation of the problem reduction technique proposed by Andersen, the crashing procedure needed for fast dual phase of Megiddo's algorithm, and the construction of the stable initial basis. By experimental comparison, we show that our implementation is superior to the crossover scheme implementation.

액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구

임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.

단체법에서 효과적인 초기기저의 설정

임성묵,김기태,박순달 한국경영과학회 2000 經營 科學 Vol.17 No.2

In this research, we compare and anlyze the two initial basis construction procedures : LPAKO's procedure proposed by Seo et. al. and symbolic crash procedure proposed by Maros et. al.. Based on the analysis, we present a new procedure which complements the previous procedures. The new procedure shows superiority to the previous procedures with respect to the optimality of initial basis. Also, the initial basis constructed by the new procedure reduces the number of simplex iterations.

우관상동맥 개구부 완전 폐쇄가 동반된 대동맥 판상부 협착증 1례

임상현,김종진,김희열,진승원,전희경,노태호,채장성,김재형,홍순조,최규보,윤정섭,김치경 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

녹차 및 결명자 추출물의 교정용 브라켓과 치면 사이의 경계부에서 분리된 mutans streptococci에 대한 항균작용

임성훈,서정순,윤영주,김광원,유소영,김화숙,국중기,이병래,차종희,박재윤 대한치과교정학회 2003 대한치과교정학회지 Vol.33 No.5

본 연구는 치아우식증에 관련된 Mutans streptococci 표준균주 및 임상분리 균주의 성장억제를 유도할 수 있는 천연 생약추출물을 검색하기 위하여 실시되었다. 녹차추출물은 CHMC-2032를 사용하였으며, 결명자 추출물은 50% 에탄올을 이용하여 얻었다. 이들 추출물의 Mutans streptococci 표준균주 및 교정환자들에서 브라켓과 치면 사이의 경계부에서 분리된 각각 10 균주씩의 S. mutans 및 S. sobrinus에 대한 최소성장억제농도를 액체배지 희석법으로 구하였다. 그 결과 CHMC-2032의 S. mutans 및 S. sobrinus의 표준 균주, S. sobrinus의 대부분 임상분리 균주에 대한 최소성장억제농도는 5 mg/ml이었다. 그러나 결명자 추출물에 의한 S. mutans 및 S. sobrinus에 대한 세균 성장억제 효과는 미미하였다. 본 연구 결과 치아우식증의 예방적 측면에서 결명자차보다는 녹차를 마시는 것이 유리하며, CHMC-2032를 이용하여 구강양치용액을 제조하여 사용할 경우 교정환자를 포함하여 대부분의 사람에게서 치아우식증 예방 효과가 있으리고 추정된다. Mutans streptococci is the major causative factor in dental caries. Especially, orthodontic patients with fixed appliance are a risk group for dental caries. Because fixed appliances attached on teeth may change the environment of dental plaque, the enamel decalcification or dental caries around the bracket and band is a major side effect of orthodontic treatment. The aim of this study was to search plant extracts that have antimicrobial effect on mutans streptococci. Seed-extract of Casio tora were prepared with ethanol and CHMC-2032, the leaf-extracts from Camellia sinensis extract, was obtained extract, 2 type strains and 20 clinical isolates of mutans streptococci isolated from the interface between orthodontic brackets and tooth surfaces in the orthodontic patients were used in this study. The minimal inhibitory concentration of CHMC-2032 was 5 mg/ml on the S. mutans KCTC 3065, S. sobrinus KCTC 3088, and 8 clinical isolates of S. sobrinus. However, there was no antibacterial effect of seed-extract of C. tora on mutans streptococci. These data suggest that green tea may be more effective than the tea prepared from C. tora in the prevention of enamel decalcification or dental caries around brackets.