• Title/Summary/Keyword: Chemical Composition test

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Chemical Composition of Cactus Pear Seed Oil: phenolics identification and antioxidant activity

  • Ali, Berraaouan;Abderrahim, Ziyyat;Hassane, Mekhfi;Marianne, Sindic;Marie-Laure, Fauconnier;Abdelkhaleq, Legssyer;Mohammed, Aziz;Mohamed, Bnouham
    • Journal of Pharmacopuncture
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    • v.25 no.2
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    • pp.121-129
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    • 2022
  • Objectives: The chemical composition of cactus pear seed oil (Opuntia ficus-indica [L.] Mill.) was analyzed in terms of its fatty acid composition, tocopherol content, phenolic identification, and the oil's phenolic-rich fraction antioxidant power was determined. Methods: Fatty acid profiling was performed by gas chromatography coupled to an FI detector. Tocopherols and phenolic compounds were analyzed by LC-FLD/UV, and the oil's phenolic-rich fraction antioxidant power was determined by phosphomolybdenum, DPPH assay and β-carotene bleaching test. Results: Fatty acid composition was marked by a high unsaturation level (83.22 ± 0.34%). The predominant fatty acid was linoleic acid (66.79 ± 0.78%), followed by oleic acid (15.16 ± 0.42%) and palmitic acid (12.70 ± 0.03%). The main tocopherol was γ-tocopherol (172.59 ± 7.59 mg/kg. In addition, Tyrosol, vanillic acid, vanillin, ferulic acid, pinoresinol, and cinnamic acid were identified as phenolic compounds in the analyzed seed oil. Moreover, the oil's phenolics-rich fraction showed a significant total antioxidant activity, scavenged DPPH up to 97.85%, and effectively protected β-carotene against bleaching (97.56%). Conclusion: The results support the potential use of cactus pear seed oil as a functional food.

Comparative Chemical Composition among the Varieties of Korean Chili Pepper

  • Lee Jang-Soo;Kang Kwon-Kyoo;Hirata Yutaka;Nou Ill-Sup;Thanh Vo Cong
    • Plant Resources
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    • v.8 no.1
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    • pp.17-26
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    • 2005
  • From the point of breeding view for our future, 20 Korean varieties of red pepper for the contents of capsaicinoids, free amino acids, free fatty acids and organic acids with powder product and eating qualities were chosen, and the sensory properties of their water and ethanol extract were compared in order to investigate the influence of the composition of test components on sensory acceptability of Korean red pepper. The composition of taste components in red pepper powder varied wildly depending on the varieties; total capsaicinoids content variety from 0.029 to $0.913\%$, free sugar 8.45 to $20.2\%$, and organic acid 4.58 to $19.54\%$. Capsaicinoid contents especially dihydrocapsaicin content, were highly correlated with pungent taste of the methanol extract of red pepper power, but did not show significant relationship to the overall sensory acceptability. However, the components analyzed here and eating and processing qualities include high variations and future breeding sources.

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Influence of Chemical composition of Ethylene-Vinyl Acetate Copolymers on Impact Noise Damping of Composites (에틸렌-초산비닐 공중합체의 공중합 조성이 복합체의 충격음 흡수성능에 미치는 영향)

  • 이현종
    • Journal of Korea Foresty Energy
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    • v.18 no.2
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    • pp.55-61
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    • 1999
  • This study was carried out to investigate the influence of viscoelastic properties(or chemical composition) of a series of ethylen-viny1 acetate copolymers on impact noise and vibration damping of wood/polymer/wood sandwich composites. The impact noise and vibration damping of composites were very sensitive to the state of molecular motion of polymer. The noise and vibration damping of composites were maximum when the polymer was under the glass transition(vinylacetate 55~75%) at the test-temperature, and minimum rubbery state(vinyl-acetate 47~20%) or glassy state(vinylacetate 100~87%). The polymer under glass transition reduced the impact noise by 6~12 dB.

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A Theoretical Performance Analysis of Small Liquid Rocket Engine for Space Vehicle Attitude Control (우주비행체 자세제어용 소형 액체로켓엔진의 이론성능 해석)

  • Kim Jeong-Soo;Park Jeong;Kim Sung-Cho;Choi Jong-Wook;Jang Ki-Won
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2005.11a
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    • pp.196-200
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    • 2005
  • A theoretical model for the calculation of chemical equilibrium composition of propellant combustion product is briefly presented for the performance analysis of monopropellant hydrazine rocket engine. Analysis result is compared to that of test and evaluation of 1-lbf class thruster and is scrutinized primarily from the view point of ammonia dissociation fraction. Chemical equilibrium composition and average molecular weight is additionally depicted according to the variation of propellant inlet pressures and the varying nozzle area ratio. The theoretical analysis is tried as a way of derivation of design parameters for mid- and large-thrust class of monopropellant rocket engines.

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Study on Performance and Meat Characteristics in Korean Native Commercial Chicken II. Study on Meat Characteristics in Korean Native Commercial Chicken by Feeding System (한국재래닭의 육용실용계의 발육 및 육질특성 구명 연구 2. 사료 급여체계에 따른 한국재래닭 육용실용계 계육의 특성)

  • 강보석;이상진;김상호;서옥석;나재천;장병귀;박범영;이종문;오봉국
    • Korean Journal of Poultry Science
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    • v.25 no.3
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    • pp.137-145
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    • 1998
  • This study was conducted to compare the meat characteristics Korean Native Commercial Chicken(KNCC) by feeding system Feeding system of T$_1$ and T$_2$were same types from hatch to 8 weeks, starter diets( 0~4 weeks, mash, ME 3,l00kcal, CP 22.94%), grower diets(4~8 weeks, crumble, ME 3,l00kcal, CP 19.31%). Nutrient contents of finisher diets of T$_1$(pellet, M.E 3, 200kcal, CP 20.44%) was higher than T$_2$(mash, ME 3,l00kcal, CP 14.88%). Breast and legs meat of KNCC were used to analyze chemical composition, physicochemical characteristics, textural traits and sensory evaluation test. Live weight(L.W) /abdominal fat accumulation(A.F.A) was significantly different(P<0.05), but live weight(L.W) /dressed weight(D.W), percentage of cutted meat, chemical composition(moisture, CF, EE, CA), meat color(CIE), physicochemical properties, sensory evaluation score were not significantly by feeding systerns, at 12 ar'd 16 weeks of age.

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The influence of the way of fat recovery from fleshing scrap on the acid value and fatty acid composition (플레싱 스크랩으로부터 유지 회수 방법이 산가 및 지방산 조성에 미치는 영향)

  • Shin, Soo-Beom;Min, Byung-Wook;Yang, Seung-Hun;Park, Min-Seok;Yang, Yung-Kon;Baik, Doo-Hyun;Kim, Hae-Sung
    • Journal of the Korean Applied Science and Technology
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    • v.24 no.4
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    • pp.347-353
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    • 2007
  • Fleshing scrap is a kind of wastes produced during leather making process and used in the test of manufacturing biodiesel. The early step of manufacturing biodiesel is fat recovery from fleshing scrap. Hence, we investigated the influence of the way of fat recovery on the fatty acid composition. We used three different recovery ways, that is chemical method by protein decomposition with acid/fat recovering, physical method by protein denaturalization with heat and vacuum/fat pressing, and biodiesel method by protein decomposition/fat recovering. The biological method yielded the best results in terms of appearance transparency. It was most effective to lower acid value. Also the recovered fat by biological method would be favorable methyl-ester reaction raw material for biodiesel because it contains more than 5% of oleic acid among unsaturated fatty acid.

Growth Response of Avena sativa in Amino-Acids-Rich Soils Converted from Phenol-Contaminated Soils by Corynebacterium glutamicum

  • Lee, Soo-Youn;Kim, Bit-Na;Choi, Yong-Woo;Yoo, Kye-Sang;Kim, Yang-Hoon;Min, Ji-Ho
    • Journal of Microbiology and Biotechnology
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    • v.22 no.4
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    • pp.541-546
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    • 2012
  • The biodegradation of phenol in laboratory-contaminated soil was investigated using the Gram-positive soil bacterium Corynebacterium glutamicum. This study showed that the phenol degradation caused by C. glutamicum was greatly enhanced by the addition of 1% yeast extract. From the toxicity test using Daphnia magna, the soil did not exhibit any hazardous effects after the phenol was removed using C. glutamicum. Additionally, the treatment of the phenol-contaminated soils with C. glutamicum increased various soil amino acid compositions, such as glycine, threonine, isoleucine, alanine, valine, leucine, tyrosine, and phenylalanine. This phenomenon induced an increase in the seed germination rate and the root elongation of Avena sativa (oat). This probably reflects that increased soil amino acid composition due to C. glutamicum treatment strengthens the plant roots. Therefore, the phenol-contaminated soil was effectively converted through increased soil amino acid composition, and additionally, the phenol in the soil environment was biodegraded by C. glutamicum.

Development of a PM Sampler for Collecting Fine Particles via Condensation Magnification

  • Kim, D.S.;Kang, C.H.;Hong, S.B.;Lee, K.W.;Lee, J.H.
    • Journal of Korean Society for Atmospheric Environment
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    • v.24 no.E1
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    • pp.24-31
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    • 2008
  • In this study, a new PM (particulate matter) sampler was developed and fabricated to collect fine particles in the atmosphere, and laboratory and field tests were carried out to evaluate the performance of the sampler. The PM sampler, which was based on impingers, employed an aerosol condensation system as a PM magnifier to improve its collection efficiencies. Sodium chloride, ammonium sulfate and ammonium nitrate aerosols were used as test particles, because these components are rich in ambient aerosols. As a result, it was found that the collection efficiency of the novel PM sampler was very high. Thus, it is believed that the PM sampler is an effective device for sampling fine particles. In addition, it was demonstrated that this work could contribute to the collection or removal of fine particles and be applied to the semicontinuous sampling of ambient aerosols for chemical composition analysis.

Improving the Skin Penetration of Cosmetics Containing Omega 3 Fatty Acids

  • KIM, Han-Sook;HAN, Sien-Ho
    • Journal of Wellbeing Management and Applied Psychology
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    • v.4 no.4
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    • pp.15-25
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    • 2021
  • Purpose: The purpose of this study is to form a new cosmetic market through the development of a composition with high skin permeability after adding omega 3 to Aloe Vera soothing gel products. Research design, data and methodology: In this study, omega-3 fatty acids were added to cosmetic products in the form of soothing gels. By applying nanoparticle technology to rapidly increase the penetration of raw materials into the skin, characteristics related to skin moisture and regeneration were determined. Omega-3 was used as a raw cosmetic material. Then 5% and 15% nanoparticle aqueous products containing omega-3 were prepared. The developed water hydrate was subjected to skin permeability test using artificial skin. Results: 53 hours of artificial transdermal penetration of the developed composition, the ethanol-based omega-3 containing nanoparticle solubilized raw material was about three times higher penetration than the ethanol-based omega-3 containing nanoparticle solubilized raw material. Conclusions: The raw material product (SR-1901) containing 5% of omega-3 nanoparticle water hydrate has skin regeneration ability and pain reduction effect. It can be expected that the skin cosmetics market will be reorganized into a new distribution structure and opportunity through omega-3 supplemented soothing gel cosmetics with improved efficacy than existing cosmetics.

Comparison of surface characterization according to surface treatment of composite resin inlay (복합레진 인레이의 표면처리방법에 따른 표면특성 비교)

  • Lee, Myung-Jin;Choi, Yu-Ri;Kang, Min-Kyung
    • Journal of Korean society of Dental Hygiene
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    • v.19 no.2
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    • pp.307-315
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    • 2019
  • Objectives: The aim of this study was to investigate the characterization of composite resin inlay surface with silane and non-thermal atmospheric pressure plasma treatment. Methods: Composite resin inlay was used as a specimen, which was treated by sandblasting + silane and sandblasting + plasma. The untreated specimens were assigned to the control group. Specimens were analyzed for surface roughness, color change, and chemical composition. Statistical analyses were performed using one-way ANOVA test (p<0.05). Results: The present findings showed that the roughness and color changes of the plasma-treated surface were significantly lower than those of the silane-treated surface. In addition, a change in the chemical composition was observed on the plasma-treated surface. Conclusions: Based on the results, non-thermal atmospheric pressure plasma could be a potential tool for the cementation of composite resin inlay.