• 식물분류학회지
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• 제43권2호
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• pp.94-98
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• 2013

제주도 선흘에서 팥꽃나무속의 신종인 제주백서향(Daphne jejudoensis M. Kim)을 발견하여 기재하였다. 제주백서향은 꽃이 백색이고 잎은 상록성이며 긴 꽃받침 통을 가져 백서향(D. kiusiana)과 유사하다. 그러나 제주백서향은 꽃받침 통과 열편에 털이 없고 장타원형(점첨두) 잎을 가지며 제주도의 중산간지역에서 자라는 반면에, 백서향은 꽃받침 통과 열편에 털이 있고 도피침형(급첨두) 잎을 가지며 거제도의 해안가에서 자라는 점에서 두 종이 뚜렷하게 차이가 난다.

• 한국의류산업학회지
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• 제4권6호
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• pp.534-543
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• 2002

The purpose of this study was to identify the body proportions of girls in middle and high school who have been a major sales target of clothing manufacturers and thus to provide the basic information on the proportion of human body, which is essential for manufacturer to produce clothing and for individual consumers to select right apparels to wear and purchase. The subjects were 133 girls in middle school and 141 girls in high school. As measuring instruments, the Martin's anthropometer, tapelines, and belts for marking waistline were used. In order to analyze the data, t-test and factor analysis were used. The measurement of vertical distance between vertex and measuring points, showed a significant difference between the high school group and middle school group in every item. In the comparison of eight head proportion between the two groups, middle school students had 7.2 head proportion while girls in high school had 6.9 head proportion in detail. The factor analysis of major divided body parts of the two groups indicated that waist-hip and hip-crotch, constituting lower trunk together, vertex-apex nasi, and apex nasi-back neck point, constituting head together, back neck point-spina scapula and spina scapula-waist, constituting posterior of upper body together, and mentum-bust point and bust point-waist, constituting anterior of upper body together, were in inverse proportion.

• 대한치과교정학회지
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• 제20권2호
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• pp.227-245
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• 1990

The purpose of this study was to analyze the reorganization of periodontal ligament after collagenase treatment with autoradiography. The author compared the collagenase-treated experimental group and no-treated experimental group with control group. Fourty eight Sprague-Dawley rats were divided into nine groups, including normal control and immediate group. Closed coil springs were used between the upper incisors and the first molars with 100 grams. Collagenase and $^3H-proline$ were adminstered and the samples were sacrificed and sectioned. After being dipped into the NTB-3 emulsion the samples were analyzed with light microscope under H/E stain. Data were analyzed by t-test and ANOVA. The results were as follows: 1) Generally collagenase-treated groups got more $^3H-proline$ uptake than no-treated groups. 2) Compared with normal control group, collagenase-treated group had the same $^3H-proline$ uptake in amount at 21th day. 3) Among cemento-enamel junction, middle, apex areas, cementa-enamel junction area of collagenase-treated group arrived at normal control level earlier than no-treated group. 4) Cemento-enamel junction area had the most $^3H-proline$ incorporation amount in no-treated group, but apex area had the most in collagenase group.

• Journal of Chest Surgery
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• 제37권1호
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• pp.98-101
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• 2004

복합 국소 동통 증후군은 외상이나 수술을 받았던 환자에게서 수술과 상관없는 사지 말단 부위의 동통, 이상 통증과 피부 온도, 색깔과 일치하지 않는 혈관 운동 이상, 발한 이상, 운동 장애와 위축이 나타나는 경우를 말한다. 말초나 중추에 있는 통증 수용체의 catecholamine에 대한 민감도가 증가되어 생기며 적외선 체열 검사를 통해 온도 차이를 확인하면 진단할 수 있으며 치료는 통증을 덜어주기 위한 치료와 장애가 있는 팔이나 다리의 기능 회복을 위한 재활 치료를 병행한다. 16세 남자에게서 수술 후 통증으로 야기된 수술 외 국소 부위에 생겨난 복합 국소 동통 증후군을 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• 한국농공학회논문집
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• 제46권6호
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• pp.21-28
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• 2004

This study aims to investigate the effects of partially distributed loads on the dynamic behaviour of steel parabolic arches by using the elasto-plastic finite element model based on the Von Mises yield criteria and the Prandtl-Reuss How rule. For this purpose, the vertical and the radial load conditions were considered as a distributed loading and the loading range is varied from 40% to 100% of arch span. Normal arch and arch with initial deflection were studied. The initial deflection of arch was assumed by the sinusoidal motile of ${\omega}_i\;=\;{\\omega}_O$ sin ($n{\pi}x/L$). Several numerical examples were tested considering symmetric initial deflection when the maximum initial deflection at the apex is fixed as L/1000. The analysis resluts showed that the maximum deflection at the apex of arch was occurred when 70% of arch span was loaded. The maximum deflection at the quarter point of arch span was occurred when 50% of arch span was loaded. It is known that the optimal rise to span ratio between 0.2 and 0.3 when the vertical or radial distributed load is applied. It is verified that the influence of initial deflection of radial load case is more serious than that of vertical load case.

• 환경생물
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• 제20권1호
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• pp.66-72
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• 2002

한반도 동해 연안에 자생하는 거머리말의 종 내 형태적 변이의 한계를 파악하기 위하여 1998년 6월부터 8월까지 (동해 중부 화진포에서부터 남부 대변까지) 식물체를 채집 비교 분석하였다. 거머리말은 연안의 석호, 항구와 만의 다양한 생육지에서 출현하였다. 생체를 대상으로 형태학적 주요 형질은 직접 측정되었으며, 이들 자료로 형질의 상관관계, 주성분 분석과 군집분석을 하였다. 외부형질의 특징에 따라 거머리말은 단협엽형, 장광엽형의 두 그룹으로 구분되었으며, 엽두 형태는 원두, 둔두, 미요두, 소요두, 유두, 예두와 미철두로 각 생육지와 집단 내에서도 변이가 다양하게 출현하였다. 동해연안에 생육하는 거머리말의 군집들은 생육환경에 따라 식물체 크기와 외부형질 변이 폭이 큰 것으로 밝혀졌다.

• Korean Journal of Acupuncture
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• 제30권3호
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• pp.178-184
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• 2013

Objectives : The warm needling technique is the method combining the effects of acupuncture needle with those of moxibustion. We need to standardize the characteristics of the warm needling technique, in order to get more systematic and objective results in operation and effects and then get more clinical abilities in these fields. Methods : In this study, using labview system on the warm needling technique, we measured and compared partial temperature changes according to the kind of needle. We studied relations of moxa cones of various sizes with the peak combustion temperature. Results and Conclusions: When we measured the warm needling's partial temperature, temperature measured at 1 and 2 cm below the head, according to the kind of needle, gold needle got the higher result on the peak than SS304 stainless steel needle. In the case of combustion of the moxa cones, cones weighing 0.4 g and 0.8 g, respectively, and the apex ignition method with gold needle showed the higher result than the apex ignition method with stainless steel needle, when we measured the effective stimulus time at 2 cm below the head and the mean temperature during the effective stimulus time. Although more research to standardize the characteristics of the warm needling technique will be needed, we suggest, according to these results, that warm needling of gold needle combined with moxa cone of 0.4 or 0.8 g is effective.

• Imaging Science in Dentistry
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• 제50권3호
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• pp.183-192
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• 2020

Purpose: This study was performed to assess the accuracy of preoperative cone-beam computed tomography (CBCT), when justified for other reasons, in locating the apical foramen and establishing the working length. Materials and Methods: Six electronic databases were searched for studies on this subject. All studies, of any type, were included if they compared measurements of working length with preoperative CBCT to measurements using an electronic apex locator (EAL) or histological reference standard. Due to the high levels of heterogeneity, an inverse-variance random-effects model was chosen, and weighted mean differences were obtained with 95% confidence intervals and P values. Results: Nine studies were included. Compared to a histological reference standard, CBCT indicated that the apical foramen was on average 0.40 mm coronal of its histological position, with a mean absolute difference of 0.48 mm. Comparisons were also performed to an EAL reference standard, but the conclusions could not be considered robust due to high levels of heterogeneity in the results. Conclusion: A low level of evidence is produced suggesting that preoperative CBCT shows the apical foramen to be on average 0.40 mm coronal to its histological position, with a mean absolute difference of 0.48 mm.

• Restorative Dentistry and Endodontics
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• 제10권1호
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• pp.55-62
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• 1984

This experimental study was made to evaluate the efficacy of root canal preparation of engine reamer versus hand reamer. Eighty extracted human teeth were prepared with the following treatments and devided into 4 groups; Group 1: Canal preparation with hand reamer, and irrigation with normal saline solution. Group 2: Canal preparation with engine reamer, and irrigation with normal saline solution. Group 3: Canal preparation with hand reamer, and irrigation with 3% hydrogen peroxide and 3.5% sodium hypochlorite solution. Group 4: Canal preparation with engine reamer, and irrigation with 3% hydrogen peroxide and irrigation with 3% hydrogen peroxide and 3.5% sodium hypochlorite solution. After decalcification, 5p. sections at levels 1-, 3-, and 5-mm from the apex were evaluated microscopically. The results were as follows; The effectiveness of hand reamer and engine reamer were equal in preparing the root canal at all levels from the apex, and were equal in normal saline solution groups, and 3% $H_2O_2$ and 3.5% NaOCl solution groups. Both in hand reaming groups and in engine reaming groups, some canal walls had still untouched portion, and canal irregularities and debris were still remained.

• Restorative Dentistry and Endodontics
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• 제43권3호
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• pp.31.1-31.7
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• 2018

Despite considerable focus on the regenerative endodontic treatment of immature teeth with necrotic infected pulps and apical periodontitis, little data exist with regard to its possible implementation in necrotic permanent teeth with complete apical and radicular development. The present report describes the procedures and outcome of a regenerative endodontic treatment approach in 2 previously-traumatized incisors with closed apex with apical periodontitis. A 2-visit treatment procedure was employed. At initial visit, the root canals were copiously irrigated, followed by placement of a triple antibiotic paste containing ciprofloxacin, metronidazole, and clindamycin into the root canals. After 4 weeks, the antibiotic paste was removed, and apical bleeding was initiated with size 10 hand files beyond the apices. The root canals were coronally sealed with mineral trioxide aggregate, and the access cavities were restored with bonded resin composite. At post-operative 60 months, both teeth were remained asymptomatic, with the recall radiographs showing complete resolution of apical radiolucency and reestablishment of periradicular tissues. In both teeth, the dimensions of root space remained unchanged as verified by image analysis. The revitalization protocol utilizing root canal disinfection and induced apical bleeding in necrotic, closed-apex incisors may offer a clinically acceptable alternative to conventional root canal treatment.