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Lee, Sung-Sik,Park, Soojin,Kim, Ju-Young,Kim, Hye-Rim,Lee, Sungyul,Oh, Han Bin The Royal Society of Chemistry 2014 Physical chemistry chemical physics Vol.16 No.18
<P>We present infrared multiple photon dissociation (IRMPD) spectroscopy and quantum chemical calculation results for the protonated permethylated β-cyclodextrin (CD)–water non-covalent complex, the simplest β-CD non-covalent complex, in the gas-phase. The IRMPD spectrum in the region 2700–3750 cm<SUP>−1</SUP> consisted of three strong peaks at 3096, 3315, and 3490 cm<SUP>−1</SUP>. These spectral features in the experimental IRMPD spectrum were compared with a large set of infrared absorption spectra predicted using density functional theory (DFT) calculations for the protonated β-CD–water complex. Complex III (see Fig. 4c), in which the water molecule (at the primary rim) and the proton (at the secondary rim) were separated, was found to suitably reflect the main spectral characteristics found in the experimental IRMPD spectrum. The absence of the homodromic hydrogen bond ring, due to replacement of hydroxyl groups with methoxy groups in permethylated β-CD, rendered the primary rim open compared with the unmodified β-CD ‘one-gate-closed’ lowest energy conformer. This study demonstrates that IRMPD studies combined with DFT theoretical calculations can be a good method for studying molecular interactions of large host–guest pairs.</P> <P>Graphic Abstract</P><P>Water was found to interact with permethylated β-CD through multiple hydrogen bondings with methoxy groups of the rim. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cp54841d'> </P>
Micronucleus test를 이용한 수종 결합용레진과 상아질결합제의 돌연변이 유발에 관한 연구
이용근,전혜림,김철위,윤숙진 大韓齒科器材學會 1992 대한치과재료학회지 Vol.19 No.1
The purpose of this study was to evaluate the mutagenicity of the bonding resins of dental composites and the dentin bonding agents. Eight bonding resins, six dentin bonding agents and distilled water (negative control) were administered orally and cyclophosphamide (positive control) was administered intraperitoneally to the mice. The mice were killed by cervical dislocation at 24 hours after administration and the femurs were removed and dissected. The bone marrow cells were collected and smeared on glass slides and stained with haematoxylin-eosin staining method and were observed with light microscope(X450). The following results can be drawn: 1. The bonding resins of dental composites and the dentin bonding agents were tested in this study seemed to be non-mutagenic. 2. The numbers of micronucleated polychromatic erythrocytes were similar both in the bonding resins of dental composites and the dentin bonding agents. 3. In the case of some products(AP, SC' and AA), the number of micronucleated polychromatic erythrocs was high beyond other products.
황사 기간 동안에 어린이, 성인, 노인에서의 자각증상과 예방행동에 대한 조사연구
이보은,하은희,박혜숙,권지숙,신경림 韓國學校保健學會 2005 韓國學校保健學會誌 Vol.18 No.1
Purpose: Recently there are scientific evidences for the health effects of Asian dust-storms. Particularly in 2002, the daily average of PM_(10) exceeded 600 and 700 ㎍/㎥ in March and April respectively. We examined the effects of Asian dust-storms on perceived symptoms and preventive behaviors among children, adults, and elders. Method: The subjects of this study were 425 children, 444 adults and 60 elders. A questionnaire survey was carried out on the children and the adults by teachers and on the elders by interviewers to obtain information on demographic variables, perceived symptoms and preventive behaviors, previous respiratory disease, environmental tobacco smoke, and proximity between the house and the road during Asian dust-storms. We analyzed using descriptive statistics, X_(2) test and multiple logistic regression models. After adjustment for potential confounders, we estimated the odds ratios and 95% confidence intervals of the children and the elders for perceived symptoms and preventive behaviors. Result: The elders had a significantly higher prevalence of respiratory symptoms than the other groups. The children had a significantly higher prevalence than the adults in getting URI (1.51), coughing (1.68), rhinorrhea (1.46), fever (2.39) and medication for allergy or asthma (1.90). The children had better behaviors than the elders in closing windows (3.57), taking less outdoor recreational activity (2.59) and staying home (2.60).
하악 대구치 Ⅱ형 근심 근관에서 치근단 부위의 만곡도 조사
윤혜림,이동균,황호길 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2
Objectives: The purpose of this study was to evaluate the buccolingual curvature at the apical one third in type Ⅱ mesial canals of mandibular molars using the radius and angle of curvature. Materials and Methods: Total 100 mandibular molars were selected. Following an endodonticaccess in the teeth, their distal roots were removed. #15 H- or K-files (Dentsply Maillefer) were inserted into the mesiobuccal and mesiolingual canals of the teeth. Radiographs of the teeth were taken for the proximal view. Among them, type Ⅱ canals were selected and divided into two subgroups, Ⅱa and Ⅱb. In type Ⅱa, two separate canals merged into one canal before reaching the apex and in type Ⅱb, two separate canals merged into one canal within the apical foramen. The radius and angle of curvature of specimens were examined. Results: In type Ⅱ, mean radius of curvature in mesiolingual and mesiobuccal canals were 2.82 mm and 3.58 mm, respectively. The radius of the curvature of mesiolingual canals were significantly smaller than that of mesiobuccal canals in type Ⅱ, and especially in type Ⅱa. However, there were no statistically significant differences in radius of curvature between mesiobuccal and mesiolingual canals in type Ⅱb and there were no significant differences in angle of curvature between type Ⅱa and Ⅱb. Conclusion: In this study, type Ⅱ mesial canals of mandibular molars showed severd curvature in the proximal view. Especially, mesiolingual canals of type Ⅱa had more abrupt curvature than mesiobuccal canals at the apical one third.
Plyometric Training과 비타민 C 투여가 남고생의 체력, 혈중 젖산, 암모니아 및 젖산탈수소효소에 미치는 영향
장준원,김세종,이현미,서혜림,조현숙,고정림,염종우,예정복,백영호 釜山大學校 附設 體育科學硏究所 2003 體育科學硏究所 論文集 Vol.19 No.-
The purpose of this was to examine the effect of plyometric training and vitamin C ingestion on physical fitness and fatigue substance....