• Title/Summary/Keyword: Mixture Compound

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DIELECTROMAGNETS FROM MIXTURE OF HARD MAGNETIC POWDERS FOR SMALL ELECTRICAL MOTORS

  • Kordecki, Andrzej;Slusarek, Barbara
    • Journal of the Korean Magnetics Society
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    • v.5 no.5
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    • pp.824-827
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    • 1995
  • Dielectromagnets are permanent magnets made from resin-bonded hard magnetic powders. Magnetic properties of dielectromagnets depend on kind of used hard magnetic materials as chemical compound, shape, size of grain and applied technology. Comparison of advantages and disadvantages of dielectromagnets made from different kind of magnetic powders induced us to try to prepare dielectromagnets from mixture of hard magnetic powders, not only one of them. The purpose of investigation on this kind of dielectromagnets is to find formula to prepare permanent magnets with properties adequate to different kind of electrical motors requirements. As hard magnetic materials we used powders of ferrite, melt-spun ribbon Nd-Fe-B and Alnico. Papers present results of investigation on technology of this kind of dielectromagnets. It shows also influence of kind of mixture and used technology on magnetic properties of dielectromagnets.

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Antiobesity Effect of Mixture of Black Garlic and Garsinia cambogia Extracts in 3T3-L1 Adipocytes and L6 Skeletal Muscle Cells

  • Jung, Young-Mi;Lee, Dong-Sub;Lee, Seon-Ha;Jeoung, Nam-Ho;Kim, Bok-Jo
    • Biomedical Science Letters
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    • v.18 no.3
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    • pp.291-298
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    • 2012
  • The antiobesity effect of the mixture of black garlic and Garsinia cambogia extracts (BGG) was investigated by measuring the Oil red O staining and the expressions of adipogenic genes during preadipocyte differentiation by real-time PCR in the 3T3-L1 adipocytes. BGG reduced contents of Oil red O dye in the 3T3-L1 adipocytes. mRNA expression levels of SREBP1c, C/EBPa, aP2/FABP4, and $PPAR{\gamma}$ which are adipogenic transcription factor, in cells treated with BGG were also significantly down regulated. Also, the phosphorylation of AMP-activated protein kinase (AMPK) in L6 cells was more increased by BGG. These results indicate that BGG seems to be more attractive compound for application of industry than individual extracts such as black garlic and Garsinia cambogia, considering it has two effects not only inhibit the preadipocyte differentiation but also activate the phosphorylation of AMPK unlike other two compound.

Radio Thin Layer Chromatography of Organic Halogen Compounds (有機할로겐化合物의 放射化 Thin Layer Chromatography)

  • YOU SUN KIM;SOON KO KIM;KI SOO KIM
    • Journal of the Korean Chemical Society
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    • v.11 no.2
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    • pp.45-50
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    • 1967
  • Radio thin layer chromatography of organic halogen compounds by neutron irradiation technique was investigated for the purpose of identifying and separating the mixture of halogen compounds. It was found that various halides, organic acids, and aldehyde gave a distinct developing peak both in cases of individual compound and a mixture of two or three components when the samples were developed by solvent methanol. But poly chlorinated compounds and aromatic or alicyclic chlorides gave more than one component peak when the sample was developed after neutron irradiation. Rf value of each compound was distinct and reproducible. The procedures were described and validity of the present method is discussed.

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A Study on the Nano Alloy Powders Synthesized by Simultaneous Pulsed Wire Evaporation (S-PWE) method II - Synthesis of Ee-Al Nano Alloy Powders (동시 전기 폭발법에 의한 나노 합금 분말 제조에 관한 연구 II - Fe-Al alloy 분말 제조)

  • ;;;O. M.;Yu. A. Kotov
    • Journal of Powder Materials
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    • v.11 no.2
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    • pp.105-110
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    • 2004
  • In this study the possibility to obtain a homogeneous mixture and to produce solid solutions and intermetallic compounds of Fe and Al nano particles by simultaneous pulsed wire evaporation (S-PWE) have been investigated. The Fe and Al wires with 0.45 mm in diameter and 35 mm in length were continuously co-fed by a special mechanism to the explosion chamber and simultaneously exploded. The characteristics, e.g., phase composition, particle shape, and specific surface area of Fe-Al nano powders have been analyzed. The synthesized powders, beside for Al and $\alpha$-Fe, contain significant amount of a high-temperature phase of $\gamma$-Fe, Fe Al and traces of other intermetallics. The phase composition of powders could be changed over broad limits by varying initial explosion conditions, e.g. wire distance, input energy, for parallel wires of different metals. The yield of the nano powder is as large as 40 wt % and the powder may include up to 46 wt % FeAl as an intermetallic compound.

A Comparison of the IAS and Langmuir Models for Multisolute Adsorption of Organic Cowlpounds in Soil (유기화합물들이 혼합상태에서 토양입자에 흡착하는 정도를 IAS와 Langmuir Model을 이용한 예측비교연구)

  • 윤춘경
    • Geotechnical Engineering
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    • v.11 no.2
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    • pp.121-138
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    • 1995
  • The Langmuir competitive model and the IAS(ideal adsorption solution) model were eveluated and compared in a multisolute adsorption study using five organic compounds (phenol, 2, 4-dichlorophenol, 2, 4, 6-trichlorophenot brucine, and thiourea) and two soils. The chemicals were evaluated individually and in mixtures. In general, the IfS model predicted the equilibrium concentration of a chemical in a mixture better than the Langmuir model. The Langmuir model underestimated the sorption of phenol when the concentration of another compound in a mixture with phenol was high. Neither of the models predicted satisfactorily the equilibrium concentration of thiourea in the mixtures. Thiourea is an aliphatic compound while the other four chemicals are aromatic compounds.

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Cardioprotective Effect of the Mixture of Ginsenoside Rg3 and CK on Contractile Dysfunction of Ischemic Heart

  • Kim, Jong-Hoon
    • Journal of Ginseng Research
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    • v.31 no.1
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    • pp.23-33
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    • 2007
  • Ginsenosides are one of the most well-known traditional herbal medicines frequently used for the treatment of cardiovascular symptoms in korea. The anti-ischemic effects of the mixture of ginsenoside $Rg_3$, and CK on ischemia-induced isolated rat heart were investigated through analyses of changes in hemodynamics ; blood pressure, aortic flow, coronary flow, and cardiac output. The subjects in this study were divided into four groups: normal control, the mixture of ginsenoside $Rg_3$ and CK, an ischemia-induced group without any treatment, and an ischemia-induced group treated with the mixture of ginsenoside $Rg_3$ and CK. There were no significant differences in perfusion pressure, aortic flow, coronary flow and cardiac output between them before ischemia was induced. The supply of oxygen and buffer was stopped for five minutes to induce ischemia in isolated rat hearts, and the mixture of ginsenoside $Rg_3$ and CK was administered during ischemia induction. Treatments of the mixture of ginsenoside $Rg_3$ and CK significantly prevented decreases in perfusion pressure, aortic flow, coronary flow, and cardiac output under ischemic conditions. In addition, hemodynamics (except heart rate) of the group treated with the mixture of ginsenoside $Rg_3$ and CK significantly recovered 60 minutes after reperfusion compared to the control group (mixture+ischemia vs ischemia - average perfusion pressure: 74.4${\pm}$2.97% vs. 85.1${\pm}$3.01%, average aortic flow volume: 49.11${\pm}$2.72% vs. 59.97${\pm}$2.93%, average coronary flow volume: 58.50${\pm}$2.81% vs. 72.72${\pm}$2.99%, and average cardiac output: 52.47${\pm}$2.78% vs. 63.11${\pm}$2.76%, p<0.01, respectively). These results suggest that treatment of the mixture of ginsenoside $Rg_3$ and CK has distinct anti-ischemic effects in ex vivo model of ischemia-induced rat heart.

Weed control efficacy of the tank-mixture between quizalofop-P-ethyl and KSC-35089, a newly synthesized N-arylphthalimide compound (신규합성된 N-arylphthalimide 화합물 KSC-35089와 Quizalofop-ethyl의 혼합처리효과)

  • Kim, Tae-Joon;Song, Jae-Eun;Choi, Jung-Sup;Kim, Hyoung-Rae;Pyon, Jong-Young;Cho, Kwang-Yun
    • The Korean Journal of Pesticide Science
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    • v.6 no.3
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    • pp.183-192
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    • 2002
  • Herbicidal effect of KSC-35089, a newly synthesized N-arylphthalimide compound, was examined, and its interaction with quizalofop-P-ethyl when foliar applied as a tank-mixture was evaluated under a greenhouse condition. KSC-35089 showed stronger herbicidal activity on broadleaves than grasses, suggesting that it would be an appropriate partner for non-selective weed control with quizalofop-P-ethyl, a strong grasskilling ageant. In general, the interaction between KSC-35089 and quizalofop-P-ethyl appeared to be additive, which indicates each compound acts on whole plant level independently. This additive interaction was confirmed in a spectrum test using 19 grasses and 26 broadleaves. Under the greenhouse condition, all tested plants were controlled around 90% level through a foliar application with a tank-mixture of KSC-35089 at 64 g ai/ha and quizalofop-P-ethyl at 32 g ai/ha. Further study would be required on the action mechanism of this additive interaction.

Basic Studies on the Pyrolysis of Lignin Compounds (리그닌 화합물의 열분해에 관한 기초 연구)

  • ;John R. Obst
    • Journal of Korea Foresty Energy
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    • v.20 no.1
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    • pp.35-41
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    • 2001
  • Lignin model compounds I-lV were pyrolyzed at 315$^{\circ}C$. The mixture compounds pyrolized were analyzed by GC-MS spectrometry. The results were summarized as follows : 1. From the pyrolysis of lignin model compound I and II, 0.45mo1 of guaiacol, 0.5mol of dimethoxyphenol(DMP), and 0.12 and 0.23mo1 of dimethoxyacetonphenone(DMAP) were produced respectively. 2. In the pyrolysis of lignin model compound III and IV, 0.26mol of guaiacol, 0.30mo1 of DMP, and 0.09 and 0.15mo1 of trimethoxyaretonphenone(TMAP) were produced respectively 3. Pyrolysis mechanism of lignin model compounds are dehydrated at first, and $\beta$-04 linkage cleavaged, and then guaiacol, DMP, DMAP and TMAP were produced. The above results show that lignin model compound I and II produce more aromatic compounds than lignin model compound III and IV. This is reason that veratryl unit structures may pyrolize easier than trimethoxyphenol unit structures. The closer research is proceeding.

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Study on the Improvement of Brazeability for Copper-Aluminum Dissimilar Materials Joint (구리-알루미늄 이종재료의 브레이징 특성 향상에 관한 연구)

  • 정호신;배동수;고성우
    • Journal of Ocean Engineering and Technology
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    • v.15 no.3
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    • pp.49-57
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    • 2001
  • One of the most important considerations to braze Cu-Al dissimilar materials is control of brittle metallic compound which makes it difficult to obtain a sound brazed joint. Nowdays, several attempts were made to control the metallic compound. But effective method for controlling metallic compound was not established. In this point of view, commercially pure aluminum and copper were used as base metal and Al-Si-X and Zn-Al-X alloy systems were developed as filler metal. Brazing was carried out to find optimum conditions for Cu-Al dissimilar joint. The results obtained in this study were summarized as follows: 1) The joint brazed by Al-Si-X filler metal showed good brazeability and mechanical properties. The tensile strength of the joint brazed over solidus temperature was more than 90% of Al base metal. Especially, the joint brazed at liquidus temperature was fractured in the Al base metal. 2) Fluorides fluxes(a mixture of potassium fluoro-aluminates) were used to improve surface cleanliness of base metal and wettability of Al-Si-X filler metal. It was melted at the temperature about 1$0^{\circ}C$ lower than that of the filler metal, and made appropriate brazing environment. Therefore, it could be a proper selection as flux.

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High-Throughput Active Compound Discovery using Correlations between Activity and Mass Profiles

  • Park, Kyu-Hwan;Yoon, Kyo-Joong;Kwon, Kyung-Hoon;Kim, Hyun-Sik
    • Mass Spectrometry Letters
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    • v.1 no.1
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    • pp.13-16
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    • 2010
  • The active components in a plant extract can be represented as mass profiles. We introduce here a new, multi-compound discovery method known as Scaling of Correlations between Activity and Mass Profiles (SCAMP). In this method, a correlation coefficient is used to quantify similarities between the extract activity and mass profiles. The method was evaluated by first measuring the anti-oxidation activity of eleven fractions of an Astragali Radix extract using DPPH assays. Next, 15 T Fouriertransform ion cyclotron resonance (FT-ICR) MS was employed to generate mass profiles of the eleven fractions. A comparison of correlation coefficients indicated two compounds at m/z 285.076 and 286.076 that were strong antioxidants. Principal component analyses of these profiles yielded the same result. FT-ICR MS, which offers a mass resolving power of 500,000, was used to discern isotopic fine structures and indicated that the molecular formula corresponding to the peak at m/z 285.076 was $C_{16}H_{13}O_5$. SCAMP in combination with high-resolution MS can be applied to any type of mixture to study pharmacological activity and is a powerful tool for active compound discovery in plant extract studies.