• 대한치과의사협회지
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• 제10권8호
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• pp.499-501
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• 1972

The origin of the 15 levator menti muscles were examined by dissection. The cadavers had been fixed in formalin. The following observations were made. Sixty-six per cent of the muscles examined originated on the crest of the bone of the residual ridge. Twenty per cent of the muscles originated between the crest of the residual ridge and the fornix of the Iabial vestibule.

• Mycobiology
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• 제31권3호
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• pp.162-165
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• 2003

Three hundred and sixty five samples of avian droppings, collected from parks and zoo, were investigated for the occurrence of Cryptococcus neoformans in Korea. Thirteen samples were positive for C. neoformans. All isolates were obtained from withered pigeon droppings. Identification and serotyping of isolates were determined by means of serological test and polymerase chain reaction(PCR) fingerprinting. All isolates belonged to C. neoformans var. grubbi(serotype A).

• 한국식품영양과학회지
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• 제24권3호
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• pp.420-426
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• 1995

Volatile compounds in raw oyster and oyster hydrolysate produced with protease were compared by vacuum simultaneous steam distillation-solvent extraction/gas chromatography/mass spectrometry. Sixty-two volatile compounds were detected in both samples. Of these, 57 were positively identified, composed mainly of aldehydes(12), ketones(9), alcohols(14), nitrogen-containing compounds(9), acids(6), terpenes(4), and miscellneous compounds(8). Levels of acids decreased after hydrolysis, whereas several other compounds such as aldehydes, ketones, and nitrogen containing compounds increased. Pyrazines, found in high abundance, were only detected in oyster hydrolysate.

• Fashion, Industry and Education
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• 제15권1호
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• pp.29-43
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• 2017

This study investigated how exposure to thin-ideal images affects social physical anxiety and body-esteem in relation to individual levels of self-consciousness. A survey questionnaire was administered to a convenience sample of 119 female college students. Sixty-seven of the 119 participated in a posttest session. The mean comparisons of social physique anxiety and body-esteem scores between pretest and posttest were conducted; no significant results were found. However, when participants were divided into two separate self-consciousness groups (high vs. low), the effect of media exposure on social physique anxiety were significant.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2003년도 제120회 추계학술대회 제 5차 한ㆍ일 치과보존학회 공동학술대회
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• pp.564-564
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• 2003

In recent years, the use of Microtomograph in dentistry were proposed and its applications are increasing. The purposes of this study is to evaluate the micro leakage in Class V restorations by using Microtomograph and to compare with other leakage test methods. Using high speed round bur, Class V cavities were prepared to the buccal sides of sixty extracted human upper premolars and randomly distributed to 4 experimental groups and restored as follows.(중략)

• 대한영양사협회학술지
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• 제10권3호
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• pp.364-374
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• 2004

This Study was carried out to investigate dietary life and recognition of diet related factors in elemantary, middle and high school students. This study was surveyed by questionnaires and data were analyzed by SPSS program. Comparative analysis was conducted according to three school student groups(elementary childrens, middle school students, high school students). The subjects were 1,886 school students(female 893, male 959) of 51 schools in nationalwide region. The Distribution of subjects was elementary school childrens 544, middle school students 661 and high school students 681. The results are summarized as follows. Only Sixty percent of the subjects had breakfast regularly. About one forth of the subjects had the habit of skipping breakfast or eating 2-3 times per week. Pricipal reasons of skipping breakfast were 'busy'(50.7%) and 'not delicious or poor appetite'(31.0%). Regularity of having breakfast and reasions of skipping breakfast were significant differences according to school student groups(p<0.001 respectively). About half of the subjects didn't have sufficient amounts in breakfast. Most subjects(92.1%) had lunch regularly by virtue of school lunch service. One forth of the subjects had dinner irregularly. Pricipal reasons of skipping dinner were 'not delicious'(41.7%), 'busy'(15.1%) and 'weight loss'(14.3%). Regularity of having dinner and reasons of skipping dinner were significant differences according to school student groups(p<0.01, p<0.001 respectively). The most delicious meal was dinner in 56.7% of the subjects and lunch in 37.1% of the subjects. There was significant difference in recognition of most delicious meal according to school student groups(p<0.001). Only ten percent of the subjects thought that nutrition education was not needed. Diettitian was recognized as nutrition educator in sixty percent of the subjects. Only 5 percent of the subject recognized teacher as nutrition educator. There were not significant differences in most delicious meal and nutrition educator according to operation type of school lunch service. The findings suggested continuous attention and guidance for healthy dietary life and necessity of nutrition education for both school students and their parents.

• 한국환경생태학회지
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• 제11권3호
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• pp.290-309
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• 1997

경기도 수리산 군포시험림의 식물군집구조를 파악하기 위하여 64개의 조사구를 설정하고 식생조사를 실시하였다. 전체 64개 조사구는 DCA ordination분석에 의하여 리기테다소나무군집(군집 I), 소나무군집(군집 II), 소나무-신갈나무군집(군집 III), 굴참나무군집(군집 IV), 갈참나무군집(군집 V), 졸참나무군집(군집 VI), 서어나무군집(군집 VII)으로 분리되었다. 식물군집구조분석결과 천이예측은 명확하지 않았으나 군집 I, 군집 III은 참나무류군집으로 천이가 예측되었고 군집II, 군집IV, 군집V, 군집VI은 현 군집을 유지할 것으로 추정되어 기후극상으로의 변화는 예측할 수 없었으며, 군집 VII은 기후극상으로서 계속 안정된 상태를 유지할 것이다. Shannon의 종다양도는 0.7430~1.3025이었고 토양산도는 전지역이 pH 4.16~5.13이었다.

• 대한치과교정학회지
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• 제25권6호
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• pp.665-674
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• 1995

The purpose of this study is to investigate the cephalometric characteristics of the open-bite patients with DJD of TMJ. The DJD open-bite cases were compared with normal samples and Class II open-bite cases with normal TMJ respectively. Twenty three open-bite patients with bilateral DJD of TMJ($13.9\~35.3$ yens old, Group I) were selected from the Department of Orthodontics, SNUDH. Group ll consisted of thirteen Class II open-bite cases($13.2\~27.4$ years old) with no TMD signs/symtoms and good condylar shapes. Group III samples were the forty eight healthy dental students who have Class I molar relationships with no history of orthodontic treatment, good facial balance and no TMD symptoms($20.0\~26.8$ years old). First, sixty measurements in the lateral cephalometric radiographs and analysis of variance(P<0.05, Scheffe) were used to compare these three groups. The seven measurements showed significant difference(p<0.05) between Group I and Group II. After analysis of variance, six of them were used for the discriminant analysis(Wilks' stepwise analysis) and the discrminant function for Group I/Group II was obtained. The results and conclusions were as follows : In most of the measurments, Group I and Group II showed the same skeletal and dental characteristics. But seven of the sixty measurements(FH-PP angle, SNB, FH-ArGo angle, articulare angle, genial angle, upper gonial angle and Ar-Go length) were significantly different(p<0.05) between Group I and Group II. These differences may be explained by the fact that in DJD cases the mandible rotated backward due to the shortening of the ramus following the degenerative destruction of condylar head and its surrounding structures. The resulting discriminant function was : $D={-0.120X}_1+{0.066X}_2+{0.144X}_3-{0.058X}_4+2000,\;where\;X_1=ArGo\;length(mm),\;X_2=SArGo\;angle(degree),\;X_3=FH-PP\;angle(degree),\;X_4=Gonial\;angle(degree)$. Mean of the group centroids was -0.555 and percent of the 'grouped' cases correctly classified was $88.89\%$.

• Radiation Oncology Journal
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• 제9권1호
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• pp.153-158
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• 1991

정위 방사선 수술 전용의 감마나이프 (LGU-type B)가 아시아에서 처음으로 본원에 설치되었다. 인수 시험을 위하여 기계적 정밀도, 선량률, 각 콜리메이터 크기에 따른 선량 분포등의 특성을 조사하였다. 1990년 5월 7일부터 1990년 9월 10일까지 총 68명 09예의 환자에게 방사선수술을 시행하였다. 환자별로는 AVM 25예 $(35\%)$, Acoustic tumor가 10예 $(14\%)$, Pituitary adenoma가 4예 $(6\%)$ metastaic tumor가 7예$(10\%)$ meningioma가 6예$(9\%)$ 기타가 18예$(26\%)$등이었다. 질병 및 병소, 크기에 따라 $25\;Gy\sim100\;Gy$를 1회에 조사하였다.

• 대한치과보철학회지
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• 제39권2호
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• pp.184-196
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• 2001

The objective of this study was to investigate the influence of resin cements and ceramic etching on shear bond strength of Empress 2 ceramic and observe the change of microstructure of ceramic according to etching time. Sixty-six square ceramic specimens($6{\times}6{\times}1.5mm$) were prepared. 6 specimens were etched with different etching times(0, 10, 20, 30, 40 and 60 seconds) and observed by means of a scanning electron microscope(SEM). Other sixty specimens were divided into 6 groups with 10 specimens in each group. 3 groups were etched with 4% hydrofluoric acid and each groups was bonded with 3 resin cements(Variolink II, Super-Bond C&B, Panavia F). Each specimen was subjected to a shear load in an Instron at a cross-head speed of 0.5mm/min and was observed with SEM after mechanical testing to establish modes of failure. The results were as follows : 1. Within etched groups, Variolink II and Super-Bond C&B exhibited significantly greater bonding strengths than Panavia F(p<0.05) 2. Bond strength of etching groups had three to five times greater than that of no-etching groups. 3. All of no-etching groups showed adhesive failure and etching groups mostly showed mixed failure. And, 20-second etching specimen showed the most distinct lithium disilicate crystal. so it is considered that 20-second etching is optimal time for bonding.