• Title/Summary/Keyword: Sulfur compound

검색결과 231건 처리시간 0.027초

유기황화합물-Polyphenylenediamine리튬전지용 정극의 전기적특성 (Electrical Characterization of Organo Sulfur Compound-Polyphenylenediamine Positive Electrode in Lithium Battery)

  • 박수길;박종은;손원근;김상욱;임기조;이주성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1997년도 춘계학술대회 논문집
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    • pp.261-264
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    • 1997
  • Polyphenylenediamine(PPD)film was prepared with organo sulfur compond (2-aminothiophenol, 1,2-ethanedithiol, and 2-aminoethaneethiol etc.) adding lithium salt to increase the electrical conductivity of the polymer surface. The molecular structure of conductive polymer synthesized were examined and discussed by using SEM, FT-IR, NMR etc. The elecrical conductivity messurement were carried out with four-probe method at dry box of He and $N_2$atmosphere. The typical value of successful electrical conductivity was 1.2$\times$10$^1$S/cm at room temperature.

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Synthesis of 3-Alkylthio-6-Allylthiopyridazine Derivatives and Their Antihepatocarcinoma Activity

  • Kwon Soon-Kyoung;Moon Aree
    • Archives of Pharmacal Research
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    • 제28권4호
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    • pp.391-394
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    • 2005
  • The allylthio group of allicin and other organosulfur compounds, isolated from garlic, is considered a pharmacophore, and a key structure component of the molecule, which affords biological activities. In the foregoing studies, various 3-alkoxy-6-allylthiopyridazine derivatives (K­compounds) were synthesized, and their biological activities tested in animals. As expected, the various derivatives showed good hepatoprotective activities on carbon tetrachloride-treated mice and aflatoxin B1-treated rats, and chemopreventive activities on hepatocarcinoma cells in rats. Other new pyridazine derivatives, with the oxygen atom at the 3-position of the 3-alkoxy­6-allylthiopyridazine displaced by sulfur (S), were synthesized, and their activities tested in vitro. Thio-K6, one of the sulfur-substituted compounds, showed better chemopreventive activity toward hepatocarcinoma cells.

Analysis of Volatile Compounds in Bulgogi Prepared by Different Heating Procedure

  • Cho, In-Hee;Lee, Hyong-Joo;Kim, Young-Suk
    • Food Science and Biotechnology
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    • 제14권3호
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    • pp.428-432
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    • 2005
  • To compare volatile compounds in bulgogi cooked by different heating procedures, bulgogi was prepared by convection oven, electric pan and charcoal grill. A total of 61 volatile compounds, consisting of 4 pyrazines, 10 sulfur-containing compounds, 7 carbonyls, 7 alcohols, 7 aliphatic hydrocarbons, 25 terpene hydrocarbons, and 1 miscellaneous compound, were tentatively identified in bulgogi cooked by the three heating methods. Comparatively, the difference in volatile compounds identified in bulgogi using the three different heating methods was not significant, except for sulfur-containing compounds and carbonyls which were detected at higher levels in the bulgogi cooked by convection oven than in that cooked by the other two heating methods. On the other hand, some compounds, such as furfural, benzaldehyde, and (E,E)-2,4-decadienal, were detected only in the bulgogi cooked by charcoal.

S를 고용한 CuInSe$_2$ 박막의 광학 특성 (Optical proper of S solute CuInSe$_2$ thin film)

  • 김규호;이재춘;김민호;배인호
    • 한국표면공학회지
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    • 제30권2호
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    • pp.136-143
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    • 1997
  • The photvoltaic power system has received considerable attention as the petroleumalterative energies to the environmental problems in the wored scale. $CuLnSe_2$is one ofthe most promising materials for the fabrication of large-area modules and low cost photovoltaic devices. Sulfur solute CuInSe2 thin films were prepared by RF sputtering using powder targer which were previously compacted by powder of $Cu_2Se, \;In_2Se_3, \;Cu_2S, \;and\;In_2S_3$ in various ratios. The results induicated that the sulfur ratio, the(112) texture, and the energy band gap were increased by the increase of the S/(S+Se) that was controlled by stoichiometric compound. The energy band gap can be shifted from 1.04eV to 1.50eV by abjusting the S/(S+Se) ratio, which maich it possible to obtain perfect match to the solar spectrum.

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Synthesis and Crystal Structure of $UP_{2}S_{6}$

  • Do, Jung-Hwan;Kim, Jung-Wook;Lah, Sang-Moo;Yun, Ho-Seop
    • Bulletin of the Korean Chemical Society
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    • 제14권6호
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    • pp.678-681
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    • 1993
  • The new ternary phase $UP_2S_6$ has been prepared and structurally characterized. The compound is isostructural with $ZrP_2S_6$ and $ThP_2S_6$ but is different from $TiP_2S_6$. The structure has been determined by a single crystal X-ray diffraction technique. $UP_2S_6$ crystallizes in the the tetragonal system $({C^2}_{4h}-P4_2/m,\;a=6.797(7)\;{\AA},\;c=9.738(12)\;{\AA})$ with two formula units in the unit cell. The structure can be described in terms of $U^{4+}$ and ${P_2S_6}^{4-}$ ions. This hexathiohypodiphosphate anion $({P_2S_6}^{4-})$ has ideally staggered conformation. The $U^{4+}$ cation is coordinated by 8 sulfur atoms in a slightly distorted dodecahedral geometry (42m). The distribution of sulfur atoms is very well optimized for this geometry.

Clinical evaluation of cetylpyridinium chloride-containing mouthwash in halitosis

  • Kang, Minkyung;Kim, Boyeon;Park, Hyounggeun;Lee, Eunseok
    • International Journal of Oral Biology
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    • 제44권1호
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    • pp.27-29
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    • 2019
  • Halitosis is a very common disease that affects the majority of the population and is characterized by unpleasant odor during expiration. Anaerobic bacteria produce a range of malodorous substances including volatile sulfur compounds. To reduce oral malodor, the amount of oral microorganisms should be managed through brushing, scraping, and use of antibacterial agents. In this study, a mouthwash containing 0.05% cetylpyridinium chloride was tested on 22 candidates with oral malodor for two weeks to confirm oral malodor reduction through the use of antibacterial mouthwashes. Volatile sulfur compound measurements were significantly lower after using the mouthwash than before using it; thus, the mouthwash effectively reduced oral malodor.

전신질환과 구취의 휘발성 황화합물 상관관계 (The Relationship Between Systemic Diseases and Oral Volatile Sulfur Compound)

  • 옥수민;태일호;안용우;고명연
    • Journal of Oral Medicine and Pain
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    • 제34권1호
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    • pp.11-21
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    • 2009
  • 목적 ; 본 연구는 가스분석검사기의 일종인 Oral $Chroma^{(R)}$(CHM-1, Osaka, Japen)를 이용하여 건강검진센터에 내원하는 환자를 대상으로 전신질환 판정검사에서 이상소견을 가진 환자에서 구취를 일으키는 휘발성 황화합물을 측정 비교하여 전신질환이 구취에 미치는 영향을 알아보고자 하였다. 방법 ; 수집된 자료는 통계분석 프로그램인 Statistical Package for the Social Science12.0(SPSS Inc, Chicago, IL, USA)을 이용하여 구강검사(CPI index, 탐침 시 출혈 유무, 설태의 유무) 결과 및 각 검사별 전신질환의 유무에 따른 황화수소, 메틸 머캅탄, 황화 디메틸의 농도를 교차분석으로 분석하였다. 결과 ; 휘발성 황화합물과 관계있는 질환은 간질환과 담낭질환이라는 사실을 확인할 수 있었으며 그 외 골밀도와 혈압, 지질검사 등에서의 관련성도 관찰되어 추후 연구가 더 필요할 것으로 생각된다.

황화수소 정제용 아연계 분무건조 탈황제의 활성성분 함량 변경에 따른 물성 및 반응 특성 (The Effect of ZnO Content on the Performance of Spray-dried Zn-based Desulfurization Sorbent for H2 Cleanup)

  • 백점인;엄태형;이중범;제갈성;류청걸
    • 한국수소및신에너지학회논문집
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    • 제25권5호
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    • pp.482-490
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    • 2014
  • Gaseous sulfur compound such as $H_2S$ or COS in coal- or biomass-derived hot syngas can be purified by solid sorbents at high temperatures. In this study, we investigated the physical properties and reactivity of solid regenerable desulfurization sorbents with 37.2, 41.9, and 46.5wt% ZnO to look into the ZnO content effect. The sorbents were produced by spray-drying method to apply to a fluidized-bed process. Sulfidation and regeneration reaction were carried out using a thermogravimetric analyzer. Sorbent prepared with 46.5wt% ZnO had physical properties suitable for a fluidized-bed process applications such as spherical shape, sufficient mechanical strength and density, high porosity and surface area. It showed high sulfur sorption capacity of 10.4wt% (ZnO utilization of 57%) at reaction temperatures of 500 and $650^{\circ}C$ for sulfidation and regeneration, respectively. However, the sulfur sorption capacity and ZnO utilization were significantly reduced and dimple shape appeared when the ZnO content decreased to 37.2 and 41.9wt%. Sulfur sorption capacity and regenerability were improved as reaction temperature increased within the experimental temperatures used in this work. The reaction temperature zones of $1500{\sim}550^{\circ}C$ and $650{\sim}700^{\circ}C$ are recommended for sulfidation and regeneration, respectively, to lead best reaction performances of the ZnO-based spray-dried sorbents developed in this work.

환원황화합물에 대한 용기채취법의 비교 연구 (Comparison of Two Experimental Approaches to Test Temporal Storability of Reduced Sulfur Compounds in Whole Sampling Method)

  • 조상희;김기현
    • 한국대기환경학회지
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    • 제28권3호
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    • pp.306-315
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    • 2012
  • In this study, storage stability of reduced sulfur compounds ($H_2S$, $CH_3SH$, DMS, $CS_2$, and DMDS) and $SO_2$ in sampling bags was investigated in terms of two contrasting storage approaches between forward (F) and reverse (R) direction. The samples for the F method were prepared at the same time and analyzed sequentially through time. In contrast, those of reverse (R) method were prepared sequentially in advance and analyzed all at once upon the preparation of the last sample. In addition, relative performance between two different bag materials (PVF and PEA) was also assessed by using 100 ppb standard. The response factors (RF) of gaseous RSC samples were determined by gas chromatography/pulsed flame photometric detector (GC/PFPD) combined with air server (AS)/thermal desorber (TD) system at storage intervals of 0, 1, and 3 days. There is no statistical difference in all RSCs between two storage methods. However, the results of relative recovery indicated 2.58~12.8% differences in compound type between the two storage methods. Moreover, loss rates and storage stability of $H_2S$ and $SO_2$ were considerably affected by bag materials than any other variables. Therefore, some considerations about storage methods (or bag material types) for sulfur compounds are needed if stored by sampling bag method.

Enantiomorphic 공간군 $P4_12_12$을 갖는 Di-(2-Picolyl) sulfur Dichloro Zinc(II)의 Absolute Configuration (Absolute Configuration of Di-(2-Picolyl) sulfur Dichloro Zinc(II) with an Enantiomorphic Space Group $P4_12_12$)

  • 최기영;이한형;김민희;황민아;강상욱;손호진;손기철;한원식;서일환
    • 한국결정학회지
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    • 제16권1호
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    • pp.21-29
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    • 2005
  • 거울상 이성질체인 di-(2-picolyl) sulfur dichloro Zinc(II), $C_{12}H_{12}N_2SCl_2Zn$의 결정구조가 두 개의 공간군 $P4_12_12\;과\;P4_32_12$로 밝혀질 수 있었다. 그러나 공간군 $P4_12_12$를 갖는 그의 absolute configuration이 anomalous dispersion의 효과에 의하여 확인되었다.