지혈제의 종류에 따른 레진 강화형 글라스아이오노머 시멘트 결합력의 차이

백설아,이준행,김종빈,한미란,김종수,Back, Seolah,Lee, Joonhaeng,Kim, Jongbin,Han, Miran,Kim, Jong Soo 대한소아치과학회 2021 大韓小兒齒科學會誌 Vol.48 No.4

이 연구의 목적은 유치의 상아질면에서 염화알루미늄 지혈제와 황화철 지혈제의 적용이 레진강화형 글라스아이오노머(RMGIC)의 결합에 미치는 영향을 전단결합강도를 통하여 평가하는 것이다. 20개의 우식이 없는 유구치가 이용되었으며 상아질이 노출되도록 시편을 제작하여 지혈제의 종류에 따라 3개의 군으로 분류하였다. I군은 치면에 25% polyacrylic acid(PAA)를 10초간 사용한 군, II군은 21.3% 염화알루미늄 지혈제를 1분간 사용한 뒤 PAA를 10초간 적용한 군, III군은 20% 황화철 지혈제를 1분간 사용한 뒤 PAA를 10초간 적용한 군으로 설정하였다. 각 군당 10개의 시편에 RMGIC를 중합하여 전단결합강도를 측정하였다. 결합강도는 I군이 10.07 ± 1.83 MPa, 2군에서 7.62 ± 0.78 MPa, 3군에서 5.23 ± 0.78 MPa였다. 모든 군의 결합강도는 유의한 차이를 보였다. 이 연구를 통해 염화알루미늄 지혈제, 황화철 지혈제 모두 상아질에서 RMGIC의 전단결합강도를 감소시키며 황화철 지혈제가 염화알루미늄 지혈제보다 RMGIC의 전단 결합강도를 더 많이 감소시키는 것을 알 수 있었다. The purpose of this study was to compare the effect of the hemostatic agent containing aluminum chloride with hemostatic agent containing ferric sulfate on the shear bond strength of resin-modified glass ionomer cement(RMGIC) to dentin in primary tooth. Twenty extracted non-carious human primary teeth were collected in this study. The specimens were cut to expose dentin and polished. The specimens were randomly seperated into 3 groups for treatment; group I: polyacrylic acid(PAA), RMGIC; group II: aluminum chloride, PAA, RMGIC; group III: ferric sulfate, PAA, RMGIC Ten specimens from each group were subjected to shear bond strength test. The mean shear bond strength of each group was as follows: 10.07 ± 1.83 MPa in Group I, 7.62 ± 0.78 MPA in group II, 5.23 ± 0.78 MPa in group III. There were significant differences among all groups(p < 0.001). In conclusion, both aluminum chloride hemostatic agent and ferric sulfate hemostatic agent decreased the shear bond strength of RMGIC to dentin. And ferric sulfate hemostatic agent decreased the shear bond strength of RMGIC more than the aluminium chloride hemostatic agent.

한조 가상이동표현에서의 ‘경로’ 표현 대조

백설비(白雪?) 길림성민족사무위원회 2018 중국조선어문 Vol.215 No.-

이동은 이동체가 실제적으로 이동하는지 안하는지에 따라 실제이동과 가상이동으로 분류할 수 있다. 실제이동은 시간이 경과됨에 따라 이동체가 위치를 이동하는 것을 말한다. 반면에 가상이동은 실제이동에 대한 인식의 확장으로 비이동체가 이동하는 것으로 개념화하여 나타내는 언어적 현상으로 정의된다. 본 론문은 가상이동표현에서 한어와 조선어가 ‘경로’요소를 나타내는 표현방식에 대해서 살펴볼 것이다. 또한 ‘경로’를 벡토르, 구성, 방향, 차원, 직시 등 다섯가지로 나누어 한어와 조선어에서 ‘경로’를 나타내는 표현방식의 공통점과 차이점을 분석할 것이다.

pH, Ion Release Capability, and Solubility Value of Premixed Mineral Trioxide Aggregates

백설아,장유지,이정환,이준행,신지선,김종빈,한미란,김종수 대한소아치과학회 2022 大韓小兒齒科學會誌 Vol.49 No.4

The current study aimed to compare the pH, solubility value, and ion release capability of premixed mineral trioxide aggregates (MTAs) versus conventional pulp capping materials before and after setting. The following materials were used: resin-modified calcium silicate cement (TheraCal LC®, TLC), resin-modified calcium hydroxide cement (Ultra-BlendTM plus, UBP), and 2 kinds of premixed MTA (Endocem MTA® premixed regular〔 EMPR〕 and Well-RootTM PT〔 WRP〕). The specimens of each material were prepared before and after setting and were immersed in distilled water. The materials’ pH and solubility value were assessed. Next, three kinds of ion (calcium, sulfide, and strontium) released by pulp capping materials were evaluated via inductively coupled plasma atomic emission spectrometry. In the after-setting group, the pH of TLC and UBP decreased. However, the pH of the premixed MTAs increased with time. TLC released a higher concentration of strontium ion compared with the other materials. Meanwhile, EMPR released a significantly high concentration of sulfide ion (p < 0.05). In the after-setting group, the 2 kinds of premixed MTAs released a significantly higher concentration of calcium ion compared with the other materials (p < 0.05). In the after-setting group, EMPR had a significantly low solubility value (p < 0.05). The Kruskal-Wallis test, followed by the Mann-Whitney U test with Bonferroni correction, was used in statistical analysis. In conclusion, resin-modified calcium silicate cement, modified calcium hydroxide cement, and the 2 kinds of premixed MTAs had an alkaline pH and low solubility value and they released various concentrations of ions after setting.

간접화행 이론

백설자 한국독일어문학회 1999 독일어문학 Vol.9 No.-

연구 논문 : 발화성격 규정어와 그 의사소통적 기능 -한국어와 독일어의 대비 연구-

백설자 한국텍스트언어학회 1998 텍스트언어학 Vol.5 No.-

학술어에 쓰이는 은유의 인식도구적 기능

백설자 한국독어독문학회 1999 獨逸文學 Vol.72 No.1

확장청크와 세분화된 문장부호에 기반한 중국어 최장명사구 식별

백설매(Xue-Mei Bai),이금희(Jin-Ji Li),김동일(Dong-Il Kim),이종혁(Jong-Hyeok Lee) 한국정보과학회 2009 정보과학회논문지 : 소프트웨어 및 응용 Vol.36 No.4

일반적으로 명사구는 기본명사구와 최장명사구로 분류되는데 최장명사구에 대한 정확한 식별은 문장의 전체적인 구문구조를 파악하고 정확한 지배용언을 찾아내는데 중요한 역할을 하게 된다. 본 논문에서는 확장된 청크(chunk) 개념과 다섯 개의 클래스로 세분화된 문장부호 정보를 자질로 사용한 두 단계 최장명사구 식별 기법을 제안한다. 제안한 기법은 기본모델보다 2.65% 향상된 평균 89.66%(F₁-measure)의 우수한 성능을 보인다. In general, there are two types of noun phrases(NP): Base Noun Phrase(BNP), and Maximal-Length Noun Phrase(MNP). MNP identification can largely reduce the complexity of full parsing, help analyze the general structure of complex sentences, and provide important clues for detecting main predicates in Chinese sentences. In this paper, we propose a 2-phase hybrid approach for MNP identification which adopts salient features such as expanded chunks and classified punctuations to improve performance. Experimental result shows a high quality performance of 89.66% in F₁-measure.

경주 및 포항 지역에서 발생한 쯔쯔가무시병에 관한 연구

백설향(Seol-Hyang Baek) 한국농촌의학 지역보건학회 2004 농촌의학·지역보건 Vol.29 No.1

Geochemistry of anorthositic xenolith and host tholeiite basalt from Jeju Island, South Korea

백설,최성희,이승구,이승렬,이효민 한국지질과학협의회 2014 Geosciences Journal Vol.18 No.2

Volcanic rocks on Jeju Island consist mainly ofintraplate alkaline lavas with subordinate intercalated tholeiitebasaltic rocks. The alkaline suite can be divided into high-Al alkali(HAA) and low-Al alkali (LAA) sub-suites. We determined the87Sr/86Sr ratios of anorthositic xenolith plagioclases and the Sr-Nd-Pb isotope compositions of the host tholeiite basalt (Taeheungribasalt). The anorthositic xenoliths are considered to representbuoyancy-induced floating cumulates from previous tholeiitemagmatism on Jeju Island. The 87Sr/86Sr ratios of the xenolithplagioclases are highly elevated compared with those of the Jejutholeiite lavas, including the host basalt. The 87Sr/86Sr ratios ofthe Jeju volcanic rocks increase from the LAA through the HAAto the tholeiite suite. The tholeiite suite generally exhibits lessradiogenic 143Nd/144Nd ratios than the alkaline suite. In Pb-Pbspace, the tholeiite suite has, in general, elevated 207Pb/204Pbratios compared with those of the alkaline suite at a given 206Pb/204Pb ratio. In contrast to the 87Sr/86Sr ratios, the two alkalinesub-suites (HAA and LAA) display indistinguishable Nd and Pbisotope compositions. Notably, some of the tholeiite and HAAsuites exhibit distinctive positive anomalies in Eu and Sr in thetrace element distribution pattern and the 87Sr/86Sr ratios increaseas a function of the degree of Sr or Eu enrichment. These observations,along with the relatively fractionated nature of the tholeiiteand especially the HAA suites, indicate that the suites might beproducts of assimilation of plagioclase-rich cumulates, possibly atlower crustal depth, during parent magma evolution. Jeju volcanicrocks exhibit a mixing line between Indian mid-ocean ridgebasalt-like depleted mantle and enriched mantle type 2 (EM2)components in Sr-Nd and Pb-Pb isotope correlation diagrams. The enriched component, the source of which may have been theasthenosphere, is supposed to have been higher in the Jejutholeiite magmatism than in the alkaline magmatism.

어른들의 반장선거 외 1편

백설화 고요아침 2017 한국동시조 Vol.- No.7