• Korean Journal of Food Science and Technology
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• v.34 no.3
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• pp.437-443
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• 2002

Using agar and gelatin as wall materials, onion oil was microencapsulated using the extrusion spraying technology. A sensitive methodology was developed for quantitative determination of the microencapsulation yield through ethyl acetate extraction and gas chromatographic analyses. Optimal conditions for the microencapsulation process consisting of the ratio of [core material, Cm] to [wall material, Wm] ($X_1$), temperature of dispersion fluid ($X_2$), detergent concentration in dispersion fluid ($X_3$), and concentration of emulsifier $(X_4)$ were determined using response surface methodology. The regression model equation for the yield of microencapsulation (Y, %) of onion oil could be predicted as $Y\;=\;97.028571-0.775000\;(X_1)-0.746726\;(X_1){\cdot}(X_1)\;-\;1.100000\;(X_3){\cdot}(X_2)$. The optimal conditions for the microencapsulation of the onion oil were determined as the ratio of [core material] to [wall material] of 4.5 : 5.5 (w/w), the temperature of dispersion fluid of $17.1^{\circ}C$ detergent concentration in dispersion fluid of 0.03%, and the concentration of emulsifier of 0.42%. Results revealed the most stable microcapsule of onion oil could be formed with the highest yield of microencapsulation (more than 95%) under optimal conditions.

• Korean Journal of Food Science and Technology
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• v.44 no.2
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• pp.191-195
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• 2012

Aminated gelatin microparticles were prepared with fucoidan at concentrations ranging from 0.5 to 2.0%. In order to acquire a higher primary amino group content regarding gelatin, gelatin was synthesized by using 1,2-ethylenediamine and free amino groups of aminated gelatin microsphere sample uncrosslinked or crosslinked with fucoidan have been determined by using trinitrobenzensulfonic acid (TNBS) methods. At the smallest fucoidan concentration, the free amino group content of the aminated gelatin microparticles was highest and decreased when fucoidan concentrations were increased. Furthermore, as concentration of fucoidan increased, the release from microparticles decreased. The $in$ $vitro$ gastric mucoadhesion of microparticles were evaluated by using fluorescent-labeled microparticles in an isolated and perfused mouse stomach. The gastric mucoadhesion of the aminated gelatin microparticles was significantly improved compared with that of gelatin microparticles.

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.769-772
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• 2000

Fish oil has abundant highlly unsaturated fatty acids such as EPA and DHA. Therefore, fish oil is very susceptible to peroxidation. Adding any antioxidants to fish oil is acceptable to prevent the peroxidation. However, nontoxic and strong naturally occurring antioxidants for fish oil was not developed. ${\alpha}-tocopherol$ is one of useful natural antioxidants, but it is not good to prevent the fish oil peroxidation. In this study, we examined the development of microencapsulated squid liver oil product to prevent effectively peroxidation of the fish oil. The acceptable materials for encapsuling the squid liver oil were gum arabic and gelatin. The ultimate encapsulation rate of squid liver oil was 45.5%.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.05a
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• pp.322-325
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• 2005

본 연구는 ${\beta}-galactosidase$에 의한 isoflavone 배당체의 비배당화 연구를 실용화하기 위하여 바람직하지 않은 관능적 요소와 화학적 반응을 제어하기 위하여 두 물질을 미세캡슐화 하고 그것의 in vitro 안정성을 연구하여 기능성식품개발에 응용토록 하는데 목적을 두었다. 실험 결과, 미세캡슐화 수율이 매우 높았으며, 인공위액 상태에서의 안정성은 높은 반면에, 인공 소장액 상태에서의 안정성이 매우 낮았다. 또한 인공소장액에서 유리된 ${\beta}-galactosidase$에 의한 유리 isoflavone의 비배당화율이 약 75% 정도로 관찰되었다. 결과적으로 판단해 볼 때, isoflavone과 ${\beta}-galactosidase$의 미세캡슐화를 통한 소화기 내에서의 비배당화와 흡수율을 극대화하는데 매우 긍정적인 가능성을 보였다.

• Korean Journal of Food Science and Technology
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• v.54 no.2
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• pp.163-170
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• 2022

Aronia (Aronia melanocarpa cv. Viking) contains high amounts of anthocyanins, which are susceptible to heat. This study was conducted to identify an efficient coating material for encapsulating aronia extract to enhance the stability of anthocyanins during cooking. Maltodextrin, maltodextrin+gum Arabic, and maltodextrin+carboxymethyl cellulose were chosen as the coating materials, mixed with aronia extract at a ratio of 2:1, and freeze-dried after homogenization. The encapsulated aronia extract was then used as a sulgidduk ingredient. Sulgidduk prepared with the encapsulated aronia had significantly higher values for redness, anthocyanin retention, total phenolic content, and antioxidant activity compared to sulgidduk prepared with non-encapsulated aronia. In addition, the sensory evaluation revealed that sulgidduk prepared with encapsulated aronia produced better color and taste. These results indicate that the encapsulation of aronia extract improved the stability of the anthocyanins in aronia, and encapsulated aronia can be used as a functional colorant in the food industry.

• Korean Journal of Soil Science and Fertilizer
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• v.38 no.5
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• pp.287-293
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• 2005

In this work, to develop soil inoculant which maintains stable viable cells and normalized quality, studies on micro-encapsulation with bacteria and yeast cells were performed by investigating materials and methods for micro-encapsulation as well as variation and stability of encapsulated cells. Preparation of capsule was conducted by application of extrusion system using micro-nozzle and peristaltic pump. K-carragenan and Na-alginate were selected as best carrier for gelation among K-carageenan, Na-alginate, locust bean gum, cellulose acetate phthalate (CAP), chitosan and gelatin tested. Comparing the gels prepared with Bacillus sp. KSIA-9 and carriers of 1.5% concentration, although viable cell of K-carragenan and Na-alginate was six times higher than those of other, Na-alginate was finally selected as carrier for gelation because it is seven times cheaper than K-carragenan. The gel of 1.5% Na-alginate was also observed to have the best morphology with circular hardness polymatrix and highest viable cell. When investigating the stability of encapsulated cells and the stabilizer effect, free cells were almost dead within 30 or 40 days whereas encapsulated cells decreased in 10% after 30 days and 15-30% even after 120 days. As stabilizer for maintaining viable cell, both 1% starch and zeolite appeared to possess the level of 70-80% cell for bacteria and yeast until after 120 days.

• Analytical Science and Technology
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• v.5 no.4
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• pp.471-475
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• 1992

We have developed the methodology for the quantitative analysis of microencapsulation yield and optimized the conditions for the microencapsulation of ${\beta}$-galactosidase by butter oil. The degree of ${\beta}$-galactosidase deactivation by the microencapsulation process was the value of 5.2% of initial activity. And the yield for the microencapsulation of ${\beta}$-galactosidase by the indirect, heat treatment, and enzymatic methodology were 92.6%, 88.6%, and 94.1%, respectively.

• Korean Journal of Food Science and Technology
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• v.39 no.1
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• pp.29-32
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• 2007

This study was carried out to investigate the effect of emulsifiers on the characteristics of microcapsule containing squid liver oil. The emulsion stability of glycerine monostearate (HLB 4) separated after 1 hr. Sucrose fatty acid esters (monostearate: di-, tri-, and tetrastearate=6:4; HLB 11), sucrose fatty acid esters (monostearate: di-, tri-, and tetrastearate=7:3; HLB 16) and glycerine monostearate (HLB 4) plus sucrose fatty acid esters (monostearate: di-, tri-, and tetrastearate= 7:3; HLB 16) separated after 1 hr 30 min. The microencapsulation efficiency prepared by HLB 16 was 35.0%. The polyunsaturated fatty acid composition was shown to be higher than 50% in all powders, and the ratio of the polyunsaturated fatty acid composition to the saturated fatty acid composition was found to be the same (2.07) for HLB 11 and HLB 16.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2000.06a
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• pp.105-105
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• 2000

• Food Science and Preservation
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• v.14 no.1
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• pp.30-34
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• 2007

This study investigated the effects of microcapsule wall materials and mixing ratios on the characteristics of microcapsules containing squid liver oil Emulsion stability was increased as Na-caseinate levels lose. Changes in mixing ratios of Na-caseinate and cyclodextrin caused micioencapsulation efficiencies to rise, fall, and then rise again. The particle size aid moisture contort of microencapsulated powders were not affected by the mixing ratios of wall materials. As the cyclodextrin content rose, water uptake was increased. The polyunsaturated fatty acid composition was shown to be higher then 50% in all powders, and the ratio of polyunsaturated fatty acid composition to saturated fatty acid composition was. 2.11 when the Na-caseinate and cyclodextrin mixing ratio was 4:6.