• 제목/요약/키워드: alginate encapsulation

검색결과 58건 처리시간 0.021초

전세포 Escherichia coli 의 캡슐고정화 (Encapsulation of Whole Cell $\beta$-Galactosidase of Escherichia coli)

  • 이병희;박중곤
    • KSBB Journal
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    • 제11권4호
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    • pp.398-404
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    • 1996
  • 전세포 효소 고정화 캡슐을 제조하기 위하여 Eschericia coli를 calcium alginate 캡슐내부에 접종하고 배양하였다. E. coli의 캡슐내부 건조중량이 1OOg/L에 달하였다. 생산배지에서 배양하는 동안 캡슐내부에 축적되는 미생물의 양이 많을수록 캡슐 내부에 축적되는 $\beta$galactosidase의 활성도 높았다. 생산배지에 금속이온 $Zn^{+2}를 2{\times}10^{-4} M $ 첨가함으로써 캡슐내부에 축척되는 ${\beta}$-galactosidase의 활성 을 25% 증가시킬 수 있었다. 캡슐제조시 해바라기유를 부피비로 2% 첨가함으로써 캡슐내부에 축적되 는 ${\beta}$-galactosidase의 활성을 10% 증가시킬 수 었었다. 부피산소전달계수, $k_La가 2.55h^- $ 안 플라스크 대신 $k_La가 82h^- $인 concentric air lift reactor 내에서 고정화 E. coli를 배양호농로써 캡슐내부의 전세포${\beta}$-galactosidase의 활성을 86% 증가시킬 수 있었다.

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Determination of Optimum Aggregates of Porcine Hepatocytes As a Cell Source of a Bioartificial Liver

  • Lee, Doo-Hoon;Lee, Ji-Hyun;Choi, Jeong-Eun;Kim, Young-Jin;Kim, Sung-Koo;Park, Jung-Keug
    • Journal of Microbiology and Biotechnology
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    • 제12권5호
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    • pp.735-739
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    • 2002
  • Large quantities of porcine hepatocyte aggregates with various degrees of aggregation (DA) could be obtained by controlling the suspension periods (0,9,24, and 48 h), and by entrapping the hepatocyte aggregates in model materials of encapsulation such as Ca-alginate and type-I collagen gels. The effects of DA on liver-specific functions of hepatocytes were evaluated in order to obtain optimum DA for the cell source of bioartificial liver (BAL) systems. Irregular rugged aggregates (size $75 \pm 28$ $\mu\textrm{m}$) farmed by 24 h of suspension culturing showed peak viability and hepatic functions such as ammonia removal and albumin secretion in the two types of entrapment systems, thus offering themselves as a stable cell source of a BAL system for hepatic functions and scale-up.

탈미네랄 골분이 비율별로 포접된 알지네이트 미세캡슐을 이용한 조직공학적 연골재생 (Effect of Ratio of Demineralized Bone Powder with Alginate Microcapsules on Articular Cartilage Regeneration)

  • 김아람;김혜민;이정근;이지혜;송정은;윤건호;이동원;강길선
    • 폴리머
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    • 제36권6호
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    • pp.768-775
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    • 2012
  • 해조류로부터 얻어지는 알지네이트는 캡슐화된 세포의 생존율에 긍정적인 영향을 끼치며 살아있는 세포를 신속하게 포접하여 캡슐화할 수 있어 세포이식을 위한 생체재료 분야에 널리 쓰인다. 탈미네랄화된 골분(DBP)은 천연 뼈조직으로부터 유래되어 조직과의 반응정도가 낮고 항원성 또한 낮아 임상에 적용되어 사용되어 왔다. 알지네이트에 비율별 DBP을 포함시켜 연골세포를 파종한 뒤 미세캡슐을 제조한 후 MTT 분석을 통하여 세포의 부착 및 증식률을 관찰하였고 glycosaminoglycan(sGAG)와 콜라겐 함량 측정과 연골세포의 특정유전자 표현형을 확인하기 위하여 PCR을 실시하였다. 또한 연골세포가 파종된 알지네이트 미세캡슐을 누드마우스의 피하에 이식한 뒤 적출하여 면역화학적 염색을 실시하였다. 실험 결과 1%의 DBP를 함유한 알지네이트 미세캡슐에서 가장 높은 세포 증식률을 보였고 표현형 유지에도 긍정적인 영향을 미치는 것을 확인하였다. 이번 연구 결과를 토대로 알지네이트와 DBP를 이용한 미세캡슐을 제조함으로써 DBP내의 성장인자와 알지네이트의 상호작용으로 인하여 연골세포의 성장에 긍정적인 영향을 미쳐 생체공학적 지지체로 적합할 것으로 예상된다.

알긴산을 이용한 송이 향의 캡슐화 (Encapsulation of Pine Agaric ( Tricholoma matsutake) Flavor with Alginates)

  • 유병진;임영선
    • 한국수산과학회지
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    • 제35권3호
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    • pp.231-236
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    • 2002
  • 국내산 송이의 특징인 송이 향을 효과적으로 보존할 수 있는 방법을 개발하기 위하여 알긴산으로 송이 향의 주된 성분인 1-oc-ten-3-ol을 캡슐화 공정과 송이 향의 잔존량에 영향을 미치는 요인을 조사한 결과는 다음과 같다. 분무건조를 위한 alginates의 점도는 350cp 이하가 되어야 하므로, alginates 용액의 점도를 낮추기 위하여 첨가한 citric acid 량이 증가할수록 점도는 낮아졌으며, 또한 $0.1\%의 농도에서 150cp 이하의 점도를 나타내었다. 1-octen-3-ol과 유화제를 첨가하여 에멀젼시킨 alginates 용액의 점도는 에멀젼시키기 전의 점도보다 높았지만 150cp 이하를 나타내 분무 건조 공정에는 영향이 없었다. alginates 용액의 점도가 낮을수록 용액의 EAI는 증가하였으나 ESI는 감소하였고 캡슐의 1-octen-3-of의 잔존량이 감소하였다. alginates 용액의 점도를 낮추는 공정에서 citric acid 첨가 후 가열시간이 길어질수록 점도는 급격히 감소하였고 에멀전 전후의 점도는 큰 차이 없었다 생송이를 알긴 산용액으로 캡슐화할 때 첨가되는 대두유의 량이 많을수록 1-oc-ten-3-ol의 잔존량이 많았다. 생송이를 alginates용액으로 캡슐화한 후 진공동결건조한 캡슐이 풍건한 것보다 1-octen-3-ol의 잔존량이 많았다.

Pseudomonas putida에서 생산된 전세포 benzoylformate decarboxylase의 활성특성 및 고정화 캡슐 제조 (Characteristic of whole cell benzoylformate decarboxylase from Pseudomonas putida)

  • 정재용;하태욱;홍진혁;오창엽;박중곤
    • KSBB Journal
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    • 제14권3호
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    • pp.264-272
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    • 1999
  • Mandelate pathway를 거치는 Pseudomonas putida(KCTC 1751)의 전세포 benzoylformate dcarboxylase를 이용하여 benzoylformate를 benzaldehyde로 변환하였고 성장배지의 조성이 cell내부에 축적되는 benzoylformate dcarboxylase의 양에 미치는 영향을 조사하였다. 전세포효소의 재사용을 위하여 calcumalginate 캡슐 고정회법을 이용하여 캡슐고정화 Pseudomonas putida를 제조하였다. 캡슐 고정화 미생물을 M3배지에서 3일간 배양한 후 M1배지에서 1일간 배양한 결과 77.75g/L의 미생물 건조중량을 얻었다. 캡슐 고정화 전세포 benzoyltormate decarboxylase의 비활생도는 자유배양에 의한 전세포효소의 비활성도에 비해 약 1/2값을 나타내었으며 캡슐 고정화 전세포 benzoyltormate decarboxylase를 20회 재사용시 20%의 실활을 보였으며 캡슐 재사용 30회 이후 미생물의 건조중량은 약 10% 감소를 보였다.

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Optimization of Screw Pumping System (SPS) for Mass Production of Entrapped Bifidus

  • Ryu, Ji-Sung;Lee, Yoon-Jong;Choi, Soo-Im;Lee, Jae-Won;Heo, Tae-Ryeon
    • Food Science and Biotechnology
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    • 제14권5호
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    • pp.566-571
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    • 2005
  • Process of screw-pumping system (SPS) was optimized for mass production of encapsulated bifidus. SPS entrapment device was composed of feeding component, with optimized nozzle size and length of 18G (0.91 cm) and 4 mm, respectively, screw pump, and 37-multi-nozzle. Screw component had five wing turns [radius (r)=26 to 15 mm] from top to bottom of axis at 78-degree angle from middle of the screw, and two wings were positioned at screw edge to push materials toward nozzle. For nozzle component, 37 nozzles were attached to 20-mm round plate. Air compressor was attached to SPS to increase productivity of encapsulated bifidus. This system could be operated with highly viscous (more than 300 cp) materials, and productivity was higher than $1128\;{\pm}\;30\;beads/min$. Viability of encapsulated bifidus was $5.45\;{\times}\;10^8\;cfu$/bead, which is superior to that of encapsulated bifidus produced by other methods ($2.51{\times}10^8\;cfu$/bead). Average diameter of produced beads was $2.048\;{\pm}\;0.003\;mm$. Survival rate of SPS-produced encapsulated bifidus was 90% for Simulator of the Human Intestinal Microbial Ecosystem test and 88% in fermented milk (for 14 days). These results show SPS is effective for use in development of economical system for mass production of viable encapsulated bifidus.

Nano-Encapsulation of Plant Growth-Promoting Rhizobacteria and Their Metabolites Using Alginate-Silica Nanoparticles and Carbon Nanotube Improves UCB1 Pistachio Micropropagation

  • Pour, Mojde Moradi;Saberi-Riseh, Roohallah;Mohammadinejad, Reza;Hosseini, Ahmad
    • Journal of Microbiology and Biotechnology
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    • 제29권7호
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    • pp.1096-1103
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    • 2019
  • UCB-1 is the commercial rootstock of pistachio. Reproduction of this rootstock by tissue culture is limited by low levels of proliferation rate. Therefore, any compound that improves the proliferation rate and the quality of the shoots can be used in the process of commercial reproduction of this rootstock. Use of plant growth-promoting bacteria is one of the best ideas. Given the beneficial effects of nanoparticles in enhancement of the growth in plant tissue cultures, the aim of the present study was to investigate the effects of nanoencapsulation of plant growth-promoting rhizobacteria (using silica nanoparticles and carbon nanotubes) and their metabolites in improving UCB1 pistachio micropropagation. The experiment was conducted in a completely randomized design with three replications. Before planting, treatments on the DKW medium were added. The results showed that the use of Pseudomonas fluorescens VUPF5 and Bacillus subtilis VRU1 nanocapsules significantly enhanced the root length and proliferation. The nanoformulation of the VUPF5 metabolite led to the highest root length (6.26 cm) and the largest shoot (3.34 cm). Inoculation of explants with the formulation of the metabolites (both bacterial strains) significantly elevated the average shoot length and the fresh weight of plant compared to the control. The explants were dried completely using both bacterial strains directly and with capsule coating after the three days.

고사리 산업화를 위한 인공종자 개발 및 생산 (Synthetic Seed Development and Production for Industrialization of Eastern Bracken)

  • 장보국;조주성;이철희
    • 한국자원식물학회:학술대회논문집
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    • 한국자원식물학회 2021년도 춘계학술대회
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    • pp.11-11
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    • 2021
  • Ferns have been consumed as food in many countries for centuries. As rich sources of protein, fiber, minerals, vitamins, essential amino acids, and fatty acids, ferns provide important nutrients to humans. Eastern bracken (Pteridium aquilinum var. latiusculum (Desv.) Underw. ex A. Heller) is the most popular edible fern in South Korea where, additionally, it has long been used as an edible wild leaf vegetable. Recently, the production of eastern brackens in South Korea (2018) has reached 14,032 tons, for an annual revenue of 83.5 billion won, and even more eastern brackens are marketed if imports are taken into account as well. Most of the common ferns can be propagated using spores. However, fern farmers cultivate seedlings through traditional propagation methods, such as root pruning or rhizome division. These propagation methods exhibit limitations in forming roots and growing-points and are labor intensive. Quality seedlings of eastern bracken can be obtained through spore propagation, but the spores are fine and difficult to handle in the field. In addition, it would require appropriate environmental control. The production of synthetic seeds using encapsulation technology is easy to establish and it can be used to achieve high productivity at low cost. Synthetic seeds contain explants embedded into a seed foam, and they overcome the limitations of micropropagation and offer the possibility of using plug seedlings. Synthetic seed matrix, such as sodium alginate, has the advantages of low cost, low toxicity, and gel stability. The present study aimed to develop and produce synthetic seeds for the commercial exploitation of eastern bracken. Furthermore, we verified spore germination and the extent of gametophyte and sporophyte development achieved with our new synthetic seeds, whose production was intended to solve current problems with the handling, storage, and transportation of eastern bracken.

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