再生骨材 콘크리트의 特性에 미치는 잔골재 混合의 影響에 關한 實驗的 硏究

李正熙,宋河永,文鐘健,趙明元 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1

It is becoming increasing1y difficult and expensive for construction contractors not only to dispose of building waste and demolition rubble but also to obtain natural aggregates of good quality for concrete product and building construction. As one of solutions for the above-mentioned problems, this study was planned to suggest a fundamental data and method for producing recycled aggregate concrete using crushed cement bricks as fine aggregates. In this study, one normal concrete with natural river sand as fine aggregate and crushed stone as coarse aggregate and three recycled aggregate concretes according to the mix proportion of recycled fine aggregate substitution ratio of 35%, 65%, 100% were made using tile water-cement ratio of 45% and 65%.

상황버섯(Phellinus linteus)으로부터 Ergosterol의 분리

류하나,유종수,송명종,이대영,김동현,노영덕,김인호,백남인 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1

상황버섯을 80% MeOH 용액으로 추출하고, 추출물을 EtOAc, n-BuOH 및 물로 분배, 추출하였다. 이 중 EtOAc 분획을 silica gel 및 octadecylsilica gel(ODS) column chromatography로 정제하여 1종의 sterol 화합물을 분리하였다. 화합물의 화학구조는 NMR, MS 및 IR 등의 스펙트럼 데이터를 해석하여, ergosta-7,22E-diene-3β,5α,6β-triol(cerevisterol, 1)로 동정하였다. 이 화합물은 상황버섯에서 처음 분리 보고 되었다. Phellinus linteus was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H_(2)O. The repeated silica gel and ODS column chromatographies of the EtOAc fraction led to the isolation of one sterol. From the result of spectral data including NMR, MS and IR, the chemical structure of the sterol was determined as ergosta-7,22E-diene-3β,5α,6β-triol (cerevisterol, 1). Compound 1 was isolated from the Phellinus linteus for the first time in this study.

活性汚泥 微生物의 分離 및 同定

강명규,배정옥,이기종,이영하 忠南大學校環境問題硏究所 1993 環境硏究 Vol.11 No.-

To investigate the microfloral composition in activated sludge, more than six hundred bacterial and fungal strains isolated from influent sewage, return sludge and aeration tank of an activated sludge sewage treatment plant were identified to the genus level. During the holding period in the aeration tank development of diverse heterotrophic microbial populations occurred and bacterial and fungal numbers in the aeration tank were 10- to 100-fold higher than in the influent sewage and return sludge. A large number of Gram-negative rods, particularly Pseudomonas, Flavobacterium, Enterobacter, Klebsiella, and Alcaligenes were found to be the dominant genera in the aeration tank. The species of filamentous fungi Trichoderma, Aspergillus, Rhizopus and Lepiomitus, and various yeasts were frequently associated with activated sludge. The most commonly found yeast genera were Candida, Geotrichum, Saccharomyces, Torulopsis and Rhodotorula.

(Pb,La)TiO_3/LiTaO_3/(Pb,La)TiO_3 다층 강유전 박막을 이용한 초전형 적외선 센서

성세경,이두현,최혁환,이명교,권태하 한국센서학회 2002 센서학회지 Vol.11 No.4

초전형 적외선 센서를 제작하기 위하여 rf 마그네트론 스퍼터링법으로 (Pb,La)TiO_3(PLT)/LiTaO_3(LTO)/PLT 강유전 박막을 증착한 후 급속 열처리하여 열처리 온도와 시간에 따른 결정성을 조사하였다. 강유전 박막의 C축 배향도에 따른 비유전율 및 유전손실을 측정하고 C축 배향도가 가장 큰 강유전 박막으로 제작된 센서에 대해 초전계수를 측정하여 센서의 전압응답에 대한 성능지수(F_V)와 감도에 대한 성능지수(F_D)를 구하였다. 얻어진 F_V, F_D는 각각 6.15×10 exp (-10) C · cm/J, 1.98×10 exp (-8) C · cm/J였다. For fabrication of the pyroelectric IR sensor (Pb,La)TiO_3(PLT)/LiTaO_3(LTO)/PLT ferroelectric thin films was deposited by rf magnetron sputtering followed by rapid thermal annealing and the crystallinity as a function of annealing temperature and time was investigated. Permittivity and dielectric loss factor of ferroelectric thin films as a function of c-axis preffered orientation was measured. Also pyroelectric coefficient of ferroelectric thin films with largest c-axis preffered orientation was measured and obtain figure of merit of voltage response(F_V) and detectivity(F_D). In this case F_V, F_D was 5.63×10 exp (-10) C · cm/J, 1.98×10 exp (-8) C · cm/J, respectively.

ANATOMICAL EXPANDER와 IMPLANT를 이용한 유방 재건의 경험

고법민,박원진,김재중,하범준,이재승,신명수 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

The use of a tissue expander and implant is the simplest option for breast reconstruction after mastectomy. Use of a round dome-shaped prosthesis and the commonly used one-stage technique with a Becker type prosthesis, however, often produces an undesirable upper pole fullness. To overcome this and to achieve improved aesthetic results, we started using an anatomically-shaped expander and implant, as described by Maxwell, as a two-stage breast reconstruction. We reviewed the results of our 21 reconstructed breasts in 22 patients who were deemed suitable for reconstruction using this technique since January 1995. The most commonly used expander was 350cc (range 350-550cc) and an average of 4.2 inflations were required before replacing the expander with a permanent implant. All the expanders were placed in submuscular pockets and implant volume. The longest follow-up was 36 months. Few complications developed and most patients were satisfied with the results. We found that the anatomically-shaped expander and implant produced better aesthetic results compared to a done-shaped prosthesis.

금강유역 수질오염 실태조사

최신석,오희목,강명규,조통래,이규승,유종국,이영하 忠南大學校 環境問題硏究所 1988 環境硏究 Vol.6 No.1

조사 구역 상류 지점의 평균 수질은 pH가 7.1, DO가 8.3mg/ℓ, BOD가 1.7mg/ℓ, COD가 1.7mg/ℓ, SS가 15.4mg/ℓ, 분변성 대장균이 1.1x10³ MPN/100ml고 상수원 수 1급 내지 2급의 양호한 상태이고 하류지점의 수질은 pH가 6.8, DO가 7.7mg/ℓ, BOD가 2.2mg/ℓ, COD가 2.4mg/ℓ, 분변성 대장균이 1.7x10³MPN/100ml로 상수원 수 2급 내지 3급의 상태를 나타내 하류로 내려가면서 오염도가 증가하는 것으로 나타났다. 청주시의 영향을 크게 받는 미호천 하류의 평균수질은 pH가 7.2, DO가 6.3mg/ℓ, BOD가 16.2mg/ℓ, COD가 15.1mg/ℓ, 분변성 대장균이 1.6x10??MPN/100ml로 심각한 오염 상태를 보여 청주시와 대전시가 금강 본류의 주 수질 오염원으로 나타났다. 영양 염류 (NH₃-N, NO₂-N, NO₃-N, PO₄-P)와 무기성 유해 성분 (Cl-, CN-, F-)의 함량은 지천의 일부 지점을 제외하고는 극히 낮은 수준으로 검출되었으며, 유기인, 페놀류, PCB 성분은 조사기간 중 전혀 검출되지 않았다. 또한 Fe, Zn, Cu, Mn, Cr, Pb, Cd, Hg등의 중금속은 검출되지 않거나 하천 수질 기준 또는 식용수 수질 기준의 허용치를 초과하지 않는 양호한 수준으로 나타났다.

Squalene Adjuvant를 이용한 단백질 항원의 세포성 면역반응 유도

도현주,김성열,안종성,하영주,이승찬,오재택,장명호,정홍석,문홍모,박해준 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.3

To investigate the role of adjuvant for cytotoxic T lymphocytes (CTL) induction, squalene-based adjuvant was studied its capability eliciting to the induction of cellular immunity as well as humoral immunity to exogeneous proteins. Ovalbumin (OVA) was used as model proteins. It was demonstrated that antigen formulation consisted of metabolizable oil squalene mixed with Tween 80 and pluronic L121 (S/TJ121) could induced the antigen specific CTL responses and antibodies irrespective of immunization routes in mice. We also demonstrated that this antigen formulation was a inducer of CD8+, major histocompatibility complex(MHC) class I-restricted, and antigen-specific C;1'Ls. These data suggest that the squalene-based emulsion system is a potent adjuvant inducing cellular immunity as well as humoral immunity.

Hierarchically three-dimensional (3D) nanotubular sea urchin-shaped iron oxide and its application in heavy metal removal and solar-induced photocatalytic degradation

Lee, Soon Chang,Jeong, Yesul,Kim, Youn Jung,Kim, Hyeran,Lee, Hyun Uk,Lee, Young-Chul,Lee, Sang Moon,Kim, Hae Jin,An, Ha-Rim,Ha, Myoung Gyu,Lee, Go-Woon,Lee, Young-Seak,Lee, Gaehang Elsevier 2018 Journal of hazardous materials Vol.354 No.-

<P><B>Abstract</B></P> <P>In this study, hierarchically three-dimensional (3D) nanotubular sea urchin-shaped iron oxide nanostructures (3D-Fe<SUB>2</SUB>O<SUB>3</SUB>) were synthesized by a facile and rapid ultrasound irradiation method. Additives, templates, inert gas atmosphere, pH regulation, and other complicated procedures were not required. Dense 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> with a relatively large Brunauer–Emmett–Teller (BET) surface area of 129.4 m<SUP>2</SUP>/g was synthesized within 23 min, and the BET surface area was further improved to 282.7 m<SUP>2</SUP>/g by a post heat-treatment process. In addition, this post processing led to phase changes from maghemite (γ phase) to hematite (α phase) Fe<SUB>2</SUB>O<SUB>3</SUB>. Subsequent characterization suggested that the growth mechanism of the 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> follows self-assembly and oriented attachment. The prepared 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> was applied to wastewater purification. Ultrasound-irradiated 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> can eliminate a As(V) and Cr(VI) from water with 25 times faster removal rate by using a one third smaller amount than commercial α-Fe<SUB>2</SUB>O<SUB>3</SUB>. This was attributed to the inter-particle pores and relatively positively charged surface of the nanostructure. In addition, post heat treatment on ultrasound-irradiated 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> significantly influenced the photocatalytic degradation of methylene blue and phenol, with a 25 times higher removal efficiency than that of commercial α-Fe<SUB>2</SUB>O<SUB>3</SUB>, because of both high BET surface area and good crystallization of the prepared samples.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The 3D- Fe<SUB>2</SUB>O<SUB>3</SUB> can be mass-produced by ultrasound irradiation method. </LI> <LI> The 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> possesses high BET surface area and interconvertible phase. </LI> <LI> The 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> exhibits rapid adsorption rates for heavy metals. </LI> <LI> The 3D-Fe<SUB>2</SUB>O<SUB>3</SUB> exhibits excellent photocatalytic activities toward the dyes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

관절염 대상자의 건강상태 조사 : 일개 도ㆍ농 복합시를 중심으로

이은희,최선하,서길희,소애영,이경숙,최정숙,고경덕,김명천,박현자,백승리,유보비,윤현숙,이애란,이명희,이은숙,임영옥,정복녀,이영숙 대한류마티스 건강전문학회 2001 근관절건강학회지 Vol.8 No.2

The Purpose of this study was to investigate the health status and to examine the relationship between health related variables of the clients with arthritis. This descriptive-correlational study was measured physical health status(pain, fatigue, physical disability, joint flexibility) and psycho-social health status(social function disability, self-efficacy, depression) . The clients were consisted of 127 arthritis clients who were randomly selected from health center, 2 sub health center and 6 primary health care center in Wonju City. The data was collected from November 2000 to January 2001. The results of the study analyzed using a SPSS win were as follows : 1) The subjects' average age was 64.81 years old(female : 86.6%, male : 13.4%). 2) In physical health status, the average score of fatigue was 63 scores and pain was 69.77 Physical disability score was higher than total disability score. In psycho-social disability, housekeeping management disability score was higher than social function disability score. In psycho-social health status, the average score of self-efficacy was 70.86 and the subjects have higher level of depression, more than 20 scores. 3) On Pain sites, almost of subjects complained of a knee joint pain. The waist, wrist, and shoulder joint Pain were followed. The numbers of Pain site were 8.3 Per individuals 4) The flexibility of knee and shoulder joint were lower than another joints. 5) Correlation with fatigue, pain, physical disability, social disability, self-efficacy and depression was revealed highly significant. We suggest that health Promotion program considering our research results should be provided for arthritis clients in community level .

Molecular Identification of Gyrodinium impudicum and Gymnodinium sanguineum by Comparing the Sequences of the Internal Transcribed Spacers 1,2 and 5.8S Ribosomal DNA

Lee, Tae Ho,LEE, SANG JUN,Lee, Jae Dong,Kim, Gi Young,Cho, Eun Seob,Ha, Myoung Gyu 한국수산학회 1999 Fisheries and Aquatic Sciences Vol.2 No.1

The sequences coding for the 5.8S rDNA and the internal transcribed spacers (ITS1 and ITS2) from the isolates of nine isolates of Gyrodinium impudicum and two isolates of Gymnodinium sanguineum species were amplified, sequenced and compared with the previously known Alexandrium species and Gymnodinium catenatum. The genetic distance analyses based on the sequence alignment indicated that Gymnodinium catenatum and Gyrodinium impudicum species were some related, Alexandrium species was distant. G. catenatum and G. sanguineum were quite separate, but these two species belonged to the same genus. G. impudicum and G. catenatum forming the closet cluster showed some variation in the alignment of ITS regions. The length of ITS1 varied more than that of ITS2 and the length of ITS1 and ITS2 was different for each G. impudicum, Gymnodinium and Alexandrium species. Also, the length of ITSl was shorter than that of ITS2. However, on the sequences of G. sanguineum, the length of ITS1 was longer about 23 nucleotides than that of ITS2. The phylogenetic analysis and rDNA similarity of G. impudicum and G. catenatum (59%) is higher than the that of G. catenatum and G. sanguineum (55%). It was thought that the phylogenetic analysis and the genetic distance revealed that G. impudicum and G. catenatum were clearly different species and G. impudicum may belong to the genus of Gymnodinium.