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사업장(事業場) 근로자(勤勞者)의 사상체질(四象體質)에 따른 생활습관(生活習慣), 자각증상(自覺症狀), 건강인식(健康認識)에 관(關)한 연구(硏究)
서명효,강홍구,장두섭,왕명자,차남현,김삼태,권소희,정해경,송용선,이기남,Seo Muoung-Hoy,Kang Hong-Goo,Jahng Doo-Sub,Wang Myoung-Ja,Cha Nam-Hyun,Kim Sam-Tae,Kwon So-Hee,Jung Hae-Kyoung,Song Yung-Sun,Lee Ki-Nam 대한예방한의학회 2003 대한예방한의학회지 Vol.7 No.2
The study was conducted to evaluate the difference of life style, subjective symptoms and health cognition depending on the Sasang Constitution in the industrial workers. The results were as follows ; Constitutional distribution among exposed group were Tae-eum In(38.4%), So-eum In(35.2%), and So-yang In(26.4%) and it was turned out that Tae-eum In took a higher portion of Sasang constitution than other constitutions in technician workers. 'Exercise' and 'Obesity' were found most in Tae-eum In, In So-eum In there were many 'Normal' weight and 'Having digestive disorders' were found most in So-eum In. There were no significant difference in the health cognition among the constitutions. The closer to 'normal' weight, the higher prevalence in 'having' concern about health condition and the more 'normal' condition in sleeping, the higher prevalence of 'having' self-confident in present health.
Zn를 첨가한 고온초전도체 Y Pr Ba₂Cu₃O 의 Raman 분석
강재필,김성재,박현진,노태호,송승기,박영민,전인 明知大學校 自然科學硏究所 1997 자연과학논문집 Vol.15 No.-
고온초전도제 Y Pr Ba₂Cu₃O 에 Zn를 첨가(x=0.00, 0.05, 0.10, 0.15, 0.20)하여 전이온도 측정, X-ray회절 실험과 Raman 실험을 하였다. Raman 측정결과 다섯 개의 시료가 일반적인 YBCO 초천도체의 Raman 스펙트럼에서 존재하는 다섯 개의 대칭활성모드(115cm¹,150cm¹.340cm¹,440cm¹,504cm¹)가 관측되었다. 이것은 Cu 와 관련된 대칭활성모드의 주파수가 모두 저주파 변위를 나타내어 Zn가 Cu(1)과 Cu(2)에 치환되었음을 의미한다. 저주파 변위 정도는 Zn에 거의 무관했으나, Raman 스펙트럼의 각 피이크의 선폭은 치환된 Zn에 의해 증가했다. 이 결과는 Zn가 Cu자리에 어느 한계 이상은 치환되지 못하고 시료 내에서 불순물상을 형성함을 나타내는 것이다. We measured transition temperature, X-ray diffraction pattern and Raman spectra of Zn added(x=0.00, 0.05, 0.10, 0.15, 0.20) high-T superconductor Y Pr Ba₂Cu₃O All samples have been observed five symmetric activity modes(115cm,150cm¹.340cm¹,440cm¹,504cm¹)which exist in Raman spectrum of general YBCO superconductor. This means Zn is substituted for Cu(1) and Cu(2) due to the fact that symmetric activity mode frequency related with Cu shows low-frequency shift. The degree of low-frequency shift was nearly independent on Zn but line width of Raman spectra peaks were increased by the substituted Zn. This results shows that Zn does not be substituted for Cu-site more than limit value and formes impurity phase in the sample.
tert-Butanol/Water 혼합용매에서 Solvated Electron(es-)과 Scavenger(LiNO₃)의 반응성에 관한 연구
姜泰範,李玄京 상명대학교 기초과학연구소 1997 기초과학연구 Vol.10 No.-
The reactivities of solvated electrons(e_{s}^{-}) with scavengers(LiNO₃) were studied in tert-butanol/water mixed solvents as a function of solvent composition and temperature. The reaction rate constant(K₂) of solvated electrons with lithium nitrate in tert-butanol/water solvents correspond to e_{s}^{-}+NO₃^{-} reaction. The reaction(e_{s} +NO₃) in the water rich region are nearly diffusion controlled. When the reactants repulsion each other(Z=-l) the value of f is <1. Removal of the coulombic interaction (K₂/f) for (e_{s} +NO₃) reaction increases as water is added to alcohol. For the reaction of solvated electronded with lithium nitrate in the tert-butanol/water solvent the activation energies(E₂) of (e_{s} +NO₃) reaction decrease as water is added to alcohol. The variations of E are inverse to those of activation energies(E₂).
치아 석회화 단계와 골 성숙도 단계간의 상관관계에 대한 연구
강동균,김태완,김영진,남순현,김현정 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.2
본 연구는 성장 중인 부정교합 환자의 진단이나 치료계획의 수립,치료방법 및 시기,예후 등을 결정하는데 중요한 판단 지침이 되는 치아 석회화 단계와 경추 및 수완부골 성숙도간의 연관성을 규명하여 개인의 보다 정확하고 효율적인 사춘기 성장 정도를 평가하기 위해 시행하였다. 전신 질환이 없고 교정 치료 경험이 없는 7-16세의 여아 154명,남아 179 명,총 333명의 파노라마 방사선사진,측모 두부규격 방사선사진,수완부 방사선사진을 분석하여 평가하였다. 연구 결과,파노라마 방사선사진의 치아 석회화 단계를 통하여 사춘기 성장 정도를 평가하는 것은 부정교합 환자의 진단 및 치료계획을 수립하는데 임상적으로 유용한 정보를 제공할 것으로 판단되었다. The purpose of this study was to investigate the relationship between the stages of calcification of various teeth and skeletal maturity stages among Korean individuals. The study subjects consisted 154 female and 179 male ranging from 7 years to 16 years of age. A total of 333 hand-wrist, cephalo-lateral and panoramic radiographs were obtained and analyzed. The tooth development of the mandibular canines, first, second premolars, and second molars were assessed according to the Dermijian' s system. Skeletal maturity stages were determined from hand-wrist radiographs by using the SMI system and cephalo-lateral radiographs by using the CVMS, respectively. The results were as follows 1. The mean ages of each stage of skeletal maturity were consistently younger in female subjects. 2. There was a high correlation between skeletal maturity of hand-wrist and cervical vertebrae in the both sexes. 3. There was a high correlation between skeletal maturity and dental calcification stage of mandibular canines, first premolar, second premolars, and second molar. 4. The mandibular second molar was tooth showing the highest correlation. 5. Percent distributions of the relationship between calcification stages of individual teeth and stages of skeletal maturity were obtained in both sexes. In summary, this suggests that tooth calcification stages from panoramic radiographs might be clinically useful as a maturity indicator of the pubertal growth period.
유치의 치근단 병소에 의해 변위된 영구치의 자발적 맹출
강동균,양승덕,김태완,김현정,김영진,남순현 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2
The infection of primary teeth occurs by caries or trauma. But, if it is not treated on time, the complication may occur such as enamel hypoplasia, discoloration, impaction, displacement and dilaceration of permanent successors. The periapical lesion on primary tooth could displace the permanent successors in any direction. Treatment options of displaced tooth are observation after extracting the primary teeth, surgical exposure, orthodontic traction, transplantation and extraction. In these cases, displacement of permanent central incisor caused by the periapical lesion of primary teeth was observed. The spontaneous eruption after extraction of primary teeth was expected considering degree of displacement, development of root and direction of eruption. This case report shows spontaneous eruption of displaced permanent tooth germ was achieved with periodic examination after extraction of primary teeth.
Hypervalent Iodonium Salt와 Organofluorosilane 의 Cross-Coupling과 Carbonylative Cross-Coupling에 관한 연구
강석구,토쿠따로야마구치,김태현,편성재 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The palladium-catalyzed cross-coupling and carbonylative cross-coupling of aryl-, alkenyl-, and alkynytfluorosilanes promoted by fluoride ion with hypervalent aryl-, alkenyliodonium tetrafluoroborates were achieved at room temperature under an atmospheric pressure of carbon monoxide.
Cd_xZn_(1-x)Te 단결정을 이용한 초고속 THz 전자파의 emitter 특성연구 (Ⅲ)
강현식,정길환,김태규,이해익 전북대학교 과학교육연구소 2002 과학과 과학교육 논문지 Vol.27 No.-
Cd_xZn_1-xTe single crystal system is most ideal crystal for ultrawere investigated for ultrafast T-ray emitters, with composition ratio x=0.00, 0.05, 0.10, 0.15, 0.20, and 0.25. We have found that Cd_0.05Zn_0.95Te crystals are best emitters for T-ray generation, also for above all composition ratio x=0.05 crystals, T-ray emitting ability depended on resitivity were investigated. The results is that the crystals greater than 100Ω-㎝ are good emitters. We study on the Azumuthal angle dependence of the (110) plane and could be explane the 3fold symmetric variation of signals. Finally we could show the linearity is above the 10^5.
강석구,정경윤,박찬희,남궁은영,김태현 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2
The coupling reaction of iodobenzene with allylic diols in the presence of Pd(OAc)_2 and nBu_3P as catalysts using K_2CO_3 as base afforded the phenyl-substituted allylic diols. However, under the same reaction conditions with Et3N as base, phenyl-substituted α-hydroxy ketone was obtained.
Pd 촉매하에서 allylic alcohol과 hypervalent iodine 화합물의 위치 선택적 vinylation에 관한 연구
강석구,이홍우,장수범,김태현,편성재 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2
The formation of carbon-carbon bond by palladium-catalyzed coupling of aryl or vinyl halides with olefins, known as the Heck reaction, has become a powerful tool in organic chemistry. In the case of allylic alcohols, palladium-catalyzed reaction of organic halides usually affords β-substituted ketones or aldehydes rether than β-substituted allylic alcohols.