• Title/Summary/Keyword: 옥장판

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국내시장정보

  • Korea Far Infrared Association
    • Journal of Korea Far Infrared Association
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    • s.15
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    • pp.36-43
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    • 2002
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Optimization of Conditions for the Double Layer Microencapsulation of Lactic Acid Bacteria (유산균 함유 이중층 미세캡슐화를 위한 조건 최적화)

  • Park, Byung-Gye;Lee, Jong-Hyuk;Shin, Hye-Kyoung;Lee, Jae-Hwan;Chang, Phan-Shik
    • Korean Journal of Food Science and Technology
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    • v.38 no.6
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    • pp.767-772
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    • 2006
  • In this study, we sought to produce a double layer microcapsule containing Lactobacillus sp. as the core material. The conditions for this microencapsulation process were optimized for the formation of a microcapsule with high storage stability. The effects of the ratio of[core material] to [wall material], the type and concentration of emulsifier used, the stirring rate(dispersibility) and the temperature of the dispersion fluid on the microencapsulation yield were studied. The optimal concentration and type of emulsifier required in order to allow for the stable formation of a W/O type emulsion (a primary process in double layer microencapsulation) were 1.00% (w/w) and polyglycerol polyricinileate (PGPR, HLB 0.6). However, the optimal concentration and type of emulsifier required to construct a W/O/W type emulsion (a secondary process in double layer microencapsulation), were 0.65% (w/w) and polyoxyethylene sorbitan monolaurate (PSML, HLB 16.7). Finally, we obtained a maximum yield of microencapsulation with a dispersion fluid stirring rate of 270rpm and a dispersion fluid temperature of 10$^{\circ}C$ after spraying a W/O/W type emulsion into the dispersion fluid.

A Study on the Synthesis of Eugenolchitosan and Safrolechitosan (Eugenol과 safrole을 부가한 chitosan 유도체 합성)

  • Kim, Je-Jung;Jung, Byung-Ok;Chang, Pahn-Shick;Park, Dong-Ki
    • Korean Journal of Food Science and Technology
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    • v.36 no.3
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    • pp.398-402
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    • 2004
  • Safrolechitosan (SaCs) and eugenolchitosan (EuCs) were synthesized and characterized to increase water solubility and functionality of chitosan. Product impurities were removed by Soxhlet apparatus using methanol to obtain final product with high purity. Using Ubbelohde viscometer, molecular weights of chitosan, EuCs, and SaCs were determined as $1.2{\times}10^{5}\;Da,\;7.8{\times}10^{5},\;and\;7.5{\times}10^{5}\;Da,\;respectively$. IR spectrum of SaCs revealed chemical shift of amide II band ($1,553cm^{-1}$) of chitosan grafted by safrole caused by generation of covalent bond between primary amino of chitosan and double bond of safrole. Due to graft reaction of safrole onto chitosan, vinyl bands ($1,611\;and\;1,442cm^{-1}$) of safrole disappeared. In graft reaction of eugenol onto chitosan, shift of amide II band ($1,553cm^{-1}$) and disappearance of vinyl band were observed. On $^{1}H-NMR$ spectrum of EuCs, $H_{2}C=CH-$ peak in eugenol (monomer) disappeared, whereas $-H_{2}C-CH_{2}-$ peak appeared. Above results indicate safrole and eugenol were successfully grafted onto chitosan.

Optimization of Conditions for the Preparation of W/O Emulsion Containing Eugenolchitosan (Eugenolchitosan 함유 유중수적형 유화 형성 조건 최적화)

  • Kim, Je-Jung;Chang, Pahn-Shick;Jung, Byung-Ok;Park, Dong-Ki
    • Korean Journal of Food Science and Technology
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    • v.35 no.3
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    • pp.423-428
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    • 2003
  • Stabilities of W/O emulsions containing eugenolchitosan (EuCs) prepared from chitosan and eugenol were compared to determine the optimal conditions for the ratio of water (core phase) to corn oil (continuous phase), the concentration of EuCs, storage temperature, and the extent of homo-mixing. The optimal ratio of water to corn oil was 2:3 (w/w). The effects of EuC concentrations, and singular vs. binary system of emulsifiers on the storage stability of the emulsion were investigated with EuCs and polyoxyethylene sorbitan monolaurate. The emulsion was stable, showing more than 95% emulsion stability index (ESI) value, when the concentration of EuCs was more than 0.18% (w/v). ESI value of binary emulsifier system was almost equal to that of singular emulsifier system at the concentration of 0.18% (w/v). At this singular emulsifier system, the W/O emulsion formed by EuCs had ESI value of 100%. The optimal concentration of EuCs was determined as 0.18% (w/v). The highest stability of the emulsion was obtained from the homo-mixing at 11,000 rpm for 10 sec and the storage temperature ranging $25{\sim}65^{\circ}C$. EuCs produced from this study was mutagenecity-negative on Ames test and contained no heavy metal ions.