• 제목/요약/키워드: spectroscopic method

검색결과 528건 처리시간 0.036초

고압 수은등의 온도분포 측정에 대한 연구 (A study on the temperature distribution measurement of the high pressure mercury lamp)

  • 손승현;김상용;김창섭;지철근
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1990년도 추계학술발표회논문집
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    • pp.35-40
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    • 1990
  • Temperature distribution of high pressure mercury lamp has been mesured as a function of time using spectroscopic method. Sampling signal which is synchronized by lamp voltage was used to mesure temporal line intensity at each radius. To obtain radial temprature distribution, the mesured intensity was transformed into radial line intensity by Abel's formula. Absolute temperature profile was calculater from relative intensities of spectral lines as a function of line and tube radius. The temperature profile is very similar to the electrical tube current profile.

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Synthesis of 4-Hydroxypiperidine Derivatives and Their Screening for Analgesic Activity

  • Saeed, M.;Saify, Z.S.;Zafar Iqbal;Nazar-ul-Islam
    • Archives of Pharmacal Research
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    • 제20권4호
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    • pp.338-341
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    • 1997
  • Six substituted phenacyl derivatives of 4-hydroxypiperidine were prepared and their structures were confirmed through spectroscopic techniques. These newly synthesized derivatives were also screened for analgesic activity by chemical and thermal methods. Only halogenated phenacyl derivatives demonstrated more or less protection against acetic acid induced writhing in mice where as rest of three derivatives were found inactive when screened by this chemical method. Similarly all the six derivatives were proved inactive by tail flick test.

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Synthesis and Characterization of Organosilane Electrolyte Containing Silphenylene

  • Kim, Jongjun;Sohn, Honglae
    • 통합자연과학논문집
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    • 제10권4호
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    • pp.197-201
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    • 2017
  • Organosilicon compound containing silphenylene unit as an eletrolyte for the application of lithium-ion batteries was synthesized by hydrosilylation method between 1,4-bis(dimethylsilylhydro)benzene and 3-[2-(2-methoxyethoxy)ethoxy]-1-propene. As-prepared new organosilicon compounds containing spacer such as propyl group with ethylene glycol are synthesized to improve thermal stability and to promote conductivity. The products are characterized by spectroscopic analysis.

산수유(Cornus officinalis) 과실에서 분리한 Fusarium lateritium SSF가 생산하는 Tricyclic Pyridone계 알칼로이드 (Tricyclic Pyridone Alkaloids from Cultures of Cornus officinalis Fruits-associated Fungus, Fusarium lateritium SSF2)

  • 최현규;심상희
    • 생약학회지
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    • 제48권4호
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    • pp.268-272
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    • 2017
  • Three tricyclic pyridone alkaloids, (-)-4,6'-anhydrooxysporidinone (1), (-)-6-deoxyoxysporidinoCne (2), and (-)-sambutoxin (3) were isolated from cultures of Fusarium lateritium SSF2 derived from the fruits of Cornus officinalis. Chemical structures of the isolated compounds were determined by spectroscopic method and comparisons with reported data values. The compounds 1-3 were isolated for the first time from this fungal strain.

Investigation of Molybdenum Oxide Thin Films for CIGS Applications

  • 빈준형;박주연;강용철
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2009년도 제38회 동계학술대회 초록집
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    • pp.388-388
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    • 2010
  • Molybdenum oxide thin films were deposited on p-type Si(100) by an RF magnetron sputtering method. The physical and chemical properties of these films were studied with X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. The thickness of molybdenum oxide thin films was measured by spectroscopic ellipsometer (SE) and the thickness was about 200 nm. As the oxygen gas pressure increased, the thickness was decreased, the phases of the thin films were changed, and the amount of metallic Mo decreased but the contents of $Mo^{6+}$ species increases.

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Raman Spectroscopic Study of Benzonitrile on Silver Surface

  • Boo, Doo-Wan;Kim, Kwan;Kim, Myung-Soo
    • Bulletin of the Korean Chemical Society
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    • 제8권4호
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    • pp.251-254
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    • 1987
  • The surface-enhanced Raman scattering(SERS) of benzonitrile in a silver sol was investigated. It was concluded that the molecule adsorbed onto the silver surface via the nitrogen lone pair electrons. Using the surface selection rule, the orientation of the benzene ring with respect to the surface plane could not be determined conclusively. However, it seemed likely that benzonitrile is adsorbed edge-on to the surface. It was demonstrated that the SERS technique provides a useful method for detailed characterization of the chemisorbed layer.

Isolation of diterpene acid from Anisotome Iyallii

  • Lim, Jin-A;Choi, Eun-Young;Oh, In-Kio;Kim, Young-Ok;Nigel, B;Baek, Seung-Hwa
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.140.1-140.1
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    • 2003
  • The diterpene acid 1 was isolated from the roots of Anisotome lyallii(Apiaceae/Umbelliferae). The structure of the compound was elucidated as anisotomenoic acid 1 on the basis of spectroscopic method. This compound was evaluated against p388 murine leukaemia and B16/F10 melanoma cells.

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A novel lanostane-type triterpene from Abies koreana

  • Kim, Hyun-Jung;Choi, Eun-Hwa;Lee, Ik-Soo
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.201.2-201.2
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    • 2003
  • A novel lanostane-type triterpene, (24E)-3,4-seco-9${\beta}$H-lanosta- 4(28),7,24- triene- 3,26- dioic acid was isolated from Abies koreana (Pinaceae) which is a tall evergreen tree grown indigenously in southern Korea. The structure of this compound was characterized by spectroscopic methods. Cytotoxicity of the compound was evaluated in vitro using the SRB method, and it showed marginal activity against human cancer cell lines.

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