• 제목/요약/키워드: compound

검색결과 11,914건 처리시간 0.045초

Isolation and Purification of Anticoagulant Polysaccharide Compound from Fermented Edible Brown Seaweed, Laminaria ochotensis

  • Nikapitiya Chamilani;Zoysa Mahanama De;Ekanayake Prashani Mudika;Park Ho-Jin;Lee Je-Hee
    • 한국양식학회지
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    • 제19권1호
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    • pp.33-39
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    • 2006
  • Anticoagulant activities of a fermented edible brown alga, Laminaria ochotensis was investigated. L. ochotensis was fermented with 15% sugar (w/v) at $25^{\circ}C$ for 10 weeks. Anticoagulant activity was measured from the supernatant of algal mixture at biweekly intervals up to $10^{th}$ week by activated partial thromboplastin (APTT), prothrombin time (PT) and thrombin time (TT) assay using citrated human plasma. Sample having high APTT activity $(6^{th}\;week)$ was filtered, ethanol precipitated and freeze-dried. The polysaccharide compound having anticoagulant activity was purified by DEAE ion exchange chromatography followed by Sepharose-4B gel filtration chromatography. Anticoagulant activity, polysaccharide concentration, and heparin like activity were determined for the collected fractions by APTT, $phenol-H_2SO_4$, and glycosaminoglycan assay, respectively. The anticoagulant activity assay showed that the activity was increased up to $6^{th}$ week, and decreased thereafter. The concentration of our purified compound was $31.0{\mu}g/ml$ and showed higher APTT activity than commercial heparin. At the same concentration of $31.0{\mu}g/ml$, the heparin showed 186.5 sec activity while our purified compound showed an activity of 386 sec. Single spot on agarose gel electrophoresis showed that the compound was purified and polyacrylamide gel electrophoresis (PAGE) results revealed that the molecular mass of the purified polysaccharide compound was between 60 and 500 kDa. Therapeutic interest of the algal polysaccharide as an anticoagulant has recently been in highlighted. This purified anticoagulant compound from fermented L. ochotensis can be used as a model for anticoagulant agent or could be developed as an anticoagulant agent. This study can be extended to identify the structure and chemical composition of the purified polysaccharide, and to establish a relationship between structure and the function of the identified anticoagulant compounds.

복합견방사 및 그 제품개발에 관한 연구 (Studies on the compound spun silk and its fabrics)

  • 남중희;송기언
    • 한국잠사곤충학회지
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    • 제18권1호
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    • pp.27-39
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    • 1976
  • 복합견방사 및 복합견직물을 시작하여 다음의 결과를 얻었다. 1 정연제별 처리효과는 규산소다, 가성소다, 탄산소 및 비누의 순이다. 2. 가성소다 3% 액으로 정연할 경우는 견담백질의 과잉 용해로 진면제조가 불가하다. 3. 견의 정연효과는 처리시간보다 농도가 크다. 4. 정연제의 단독사용보다는 이중이상을 혼용하는 것이 진면품질을 향상시킬 수 있다. 5. 견수방사의 명주소리와 광택향상을 위하여서는 유기산의 혼용이 요구된다. 6. 심사에 의하여 복합수방사의 강도는 증가한다. 7. 복합수방사의 성도변동율은 8∼l2%이다. 8. 견과 데도롱직의 염색은 이욕법으로 처리하여야 한다. 9. 복합수방사 견직물의 수축율은 23%이다. 10. 복합수방사직물은 여자용 동복지로 복합생사 직물은 부라우스지로 사용 가능하다.

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Analysis of Beauvericin and Unusual Enniatins Co-Produced by Fusarium oxysporum FB1501 (KFCC 11363P)

  • Song Hyuk-Hwan;Ahn Joong-Hoon;Lim Yoong-Ho;Lee Chan
    • Journal of Microbiology and Biotechnology
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    • 제16권7호
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    • pp.1111-1119
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    • 2006
  • Beauvericins and enniatins are cyclohexadepsipeptides exhibiting various biological activities on animal systems, including humans. Fusarium oxysporum FB1501 (KFCC 11363P) that produces four different cyclohexadepsipeptides was isolated from soil in Korea and the structures of the four cyclohexadepsipeptides elucidated by HPLC, MS, IR, and NMR analyses. The molecular weights for compounds 1,2,3, and 4 were determined to be 654.5, 784.5, 668.6, and 682.5, respectively, on the basis of ESI-MS measurements. The IR spectra for all the compounds exhibited absorptions for ester $(1,733-1,743\;cm^{-1})$ and amide $(1,649-1,655\;cm^{-1})$ bonds that were very similar to those for beauvericin and enniatins with ester and amide absorptions. The results of the NMR analysis $(^{1}H,\;^{13}C,\;135-DEPT,\;COSY,\;HMQC,\;and\;HMBC;\;in\;COCl_{3})$ revealed that compounds 1,3, and 4 consisted of $_{L}-N-methyl\;valine$ (N-MeVal), $_{D}-{\alpha}-hydroxyisovaleic\;acid$ (Hiv), and 2-hydroxy-3-methylpentanoic acid (Hmp) residues (compound 1: three N-MeVal residues, two Hiv residues, and one Hmp residue; compound 3: three N-MeVal residues, one Hiv, and two Hmp residues; compound 4: three N-MeVal residues and three Hmp residues). Therefore, the compounds were identified as enniatin H (compound 1), enniatin I (compound 3), and enniatin MK1688 (compound 4). Compound 2 was analyzed as beauvericin according to 1D and 2D NMR analyses. This study is the first report related to the co-production of beauvericin with other unusual enniatins, such as enniatin H, enniatin I, and enniatin MK1688, by Fusarium oxysporum.

Biotransformation of Protopanaxadiol-Type Ginsenosides in Korean Ginseng Extract into Food-Available Compound K by an Extracellular Enzyme from Aspergillus niger

  • Jeong, Eun-Bi;Kim, Se-A;Shin, Kyung-Chul;Oh, Deok-Kun
    • Journal of Microbiology and Biotechnology
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    • 제30권10호
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    • pp.1559-1566
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    • 2020
  • Compound K (C-K) is one of the most pharmaceutically effective ginsenosides, but it is absent in natural ginseng. However, C-K can be obtained through the hydrolysis of protopanaxadiol-type ginsenosides (PPDGs) in natural ginseng. The aim of this study was to obtain the high concentration of food-available C-K using PPDGs in Korean ginseng extract by an extracellular enzyme from Aspergillus niger KACC 46495. A. niger was cultivated in the culture medium containing the inducer carboxymethyl cellulose (CMC) for 6 days. The extracellular enzyme extracted from A. niger was prepared from the culture broth by filtration, ammonium sulfate, and dialysis. The extracellular enzyme was used for C-K production using PPDGs. The glycoside-hydrolyzing pathways for converting PPDGs into C-K by the extracellular enzyme were Rb1 → Rd → F2 → C-K, Rb2 → Rd or compound O → F2 or compound Y → C-K, and Rc → Rd or compound Mc1 → F2 or compound Mc → C-K. The extracellular enzyme from A. niger at 8.0 mg/ml, which was obtained by the induction of CMC during the cultivation, converted 6.0 mg/ml (5.6 mM) PPDGs in Korean ginseng extract into 2.8 mg/ml (4.5 mM) food-available C-K in 9 h, with a productivity of 313 mg/l/h and a molar conversion of 80%. To the best of our knowledge, the productivity and concentration of C-K of the extracellular enzyme are the highest among those by crude enzymes from wild-type microorganisms.

Compound 48/80과 anti-DNP IgE로 유도되는 비만세포 활성화에 대한 복분자의 억제효과 (Inhibitory Effect of Rubus Coreanus on Compound 48/80- or Anti-DNP IgE-Induced Mast Cell Activation)

  • 이광소;채옥희;송창호
    • IMMUNE NETWORK
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    • 제4권2호
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    • pp.100-107
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    • 2004
  • Background: The fruit of Rubus coreanus (RC), a perennial herb, has been cultivated for a long time as a popular vegetable. The anti-allergy mechanism of RC is unknown. The purpose of this study is to investigate the inhibitory effect of RC on compound 48/80- or anti-DNP IgE-induced mast cell activation. Methods: For this, influences of RC on the compound 48/80-induced degranulation, histamine release, calcium influx and the change of the intracellular cAMP (cyclic adenosine-3',5' monophosphate) levels of rat peritoneal mast cells (RPMC) and on the anti-DNP IgE-induced histamine release of RPMC were observed. Results: The pretreatment of RC inhibited compound 48/80-induced degranulation, histamine release and intracelluar calcium uptake of RPMC. The anti-DNP IgE-induced histamine release of RPMC was significantly inhibited by pretreatment of RC. The RC increased the level of intracellular cAMP of RPMC, and the pretreatment of RC inhibited compound 48/80-induced decrement of intracellular cAMP of RPMC. Conclusion: These results suggest that RC contains some substances with an activity to inhibit the compound 48/80- or anti-DNP IgE-induced mast cell activitation. The inhibitory effects of RC are likely due to the stabilization of mast cells by blocking the calcium uptake and enhancing the level of intracellular cAMP.

아연 착화합물의 입자형성 및 마찰대전량에 미치는 금속염 및 다가알코올 첨가의 영향 (Effects of the Addition of Metallic Salts and Polyhydric Alcohols on the Formation and the Triboelectric Charge of Zinc Complex-compound Particle)

  • 인세진
    • 청정기술
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    • 제19권3호
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    • pp.249-256
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    • 2013
  • 본 연구에서는 프린터 토너의 대전량 제어제로 사용되는 아연 착화합물 제조시 금속염과 다가알코올을 첨가함에 따라 변화되는 입자 형태, 평균 입도 및 마찰대전량에 대해 고찰하였다. 아연 착화합물을 제조하기 위해 염화아연과 3,5-di-tert-butyl salicylic acid를 사용하였다. 다가알코올을 첨가함에 따른 입자 형태 변화를 확인하기 위해 아연 착화합물 제조시 폴리에틸렌 글리콜(PEG-300), 글리세린 및 에틸렌글리콜을 첨가하였고, 금속염인 염화알루미늄을 첨가함으로써 변화되는 입자크기를 확인하였다. 또한 금속염과 다가알코올을 동시에 첨가하여 입도 변화를 확인한 결과, 각각 단독으로 첨가 했을 때보다 아연착화합물의 평균 입도가 더 많이 감소하는 것을 확인할 수 있었다. 특히, 알루미늄 착화합물의 함유량이 30 wt%이고 염화아연에 대한 PEG-300의 몰비를 3으로 하였을 때 아연 착화합물의 평균 입도가 $2.33{\mu}m$로 순수한 아연 착화합물의 평균 입도인 $5.28{\mu}m$의 44.1%로 가장 많이 감소한 것을 알 수 있었다.

국산 Kaolin 광물에 수반된 철화합물의 종류 및 존재상태 구명에 관한 연구 (A Study on Iron Compounds Accompanied in Korean Kaolin Minerals)

  • 박금철;최석진;박영갑
    • 한국세라믹학회지
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    • 제11권2호
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    • pp.22-30
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    • 1974
  • This study was carried out to investigate the species of iron compounds in kaolin mineral and the bonding relation between the major kaolin and its subordinate iron compound existing as incidental mineral in common clay by means of chemical composition, X-ray diffraction, thermal differential and thermogravimetrie analysis for the application of clays in the field of ceramic raw material. The domestic clay are produced abounduntly in many places, but San-Cheong kaolin, Chu-An clay, and Yeong-Am clay were selected as samples in this experiment because of their frequent utilization in porcelain industry. Two kinds of samples with low and high iron content are picked up respectively from the place of production and elutriated under two micron size to determine the properties and concentration of iron compound very fine particles or colloidal substance of low crystalline grade. Therefore, hydrothermal treatment in autoclave was conducted considering the existence of low crystalline grade of iron compounds known as an amorphoue state in X-ray diffraction pattern furthermore, de-iron treatment of hydrothermal compound was done in order to identify the related iron compound before and after hydrothermal reaction and iron compound which is one of the samples was synthesized for the determination of their compounds state in more detail. The obtained results in this study are as follows: In San-Cheong kaolin, Chu-An clay and Yeong-Am clay 1) It is proved that species accompanying iron compound is $\alpha$-FeOOH form. 2) Iron compound is composed of very fine particles or colloidal substance. 3) The iron substance encircles the fine parts of clay minerals under 2 micron and acts as cementizing agent.

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산수유(Cornus officinalis)로부터 혈전용해물질의 확인 및 특성 연구 (Identification and Characterization of Fibrinolytic Compound from Cornus officinalis S. et Z)

  • 김준호
    • 한국자원식물학회지
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    • 제33권4호
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    • pp.237-244
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    • 2020
  • 산수유 열수추출물의 혈전용해활성을 탐색하고, 유기용매로 분획화한 에틸아세테이트(ethyl acetate) 분획물에서 1.36 plasmin units/mL의 강한 혈전용해활성을 확인하였다. Amberlite IRA-400, Sephadex LH-20 column, active charcoal column과 재결정으로 정제한 혈전용해화합물을 HPLC로 분석 비교한 결과, 표준물질인 malic acid와 같은 retention time (RT)을 나타내고, LC/MS/MS 분석의 Negative mode 측정 시 m/z 133에서 같은 peak를 나타내어 정제한 화합물이 분자량 134 Da인 malic acid 임을 확인하였다. 정제한 화합물은 0.69 plasmin units/mL의 혈전용해활성을 보이고, 14.62%의 트롬빈 저해활성을 나타냈으며, 6.42%의 항산화 효과와 17.28%의 항당뇨 효과를 나타냈다. 분리한 화합물은 섬유소원의 Aα chain, Bβ chain과 반응하지 않았지만 γ chain을 분해하는 것으로 나타났다. 위 연구 결과를 바탕으로 산수유에서 분리한 혈전용해화합물은 혈관계 질환의 치료제 개발과 기능성 식품 개발을 위한 우수한 소재로 이용 가능할 것으로 예상된다.

Enzymatic formation of compound-K from ginsenoside Rb1 by enzyme preparation from cultured mycelia of Armillaria mellea

  • Upadhyaya, Jitendra;Kim, Min-Ji;Kim, Young-Hoi;Ko, Sung-Ryong;Park, Hee-Won;Kim, Myung-Kon
    • Journal of Ginseng Research
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    • 제40권2호
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    • pp.105-112
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    • 2016
  • Background: Minor saponins or human intestinal bacterial metabolites, such as ginsenosides Rg3, F2, Rh2, and compound K, are more pharmacologically active than major saponins, such as ginsenosides Rb1, Rb2, and Rc. In this work, enzymatic hydrolysis of ginsenoside Rb1 was studied using enzyme preparations from cultured mycelia of mushrooms. Methods: Mycelia of Armillaria mellea, Ganoderma lucidum, Phellinus linteus, Elfvingia applanata, and Pleurotus ostreatus were cultivated in liquid media at $25^{\circ}C$ for 2 wk. Enzyme preparations from cultured mycelia of five mushrooms were obtained by mycelia separation from cultured broth, enzyme extraction, ammonium sulfate (30-80%) precipitation, dialysis, and freeze drying, respectively. The enzyme preparations were used for enzymatic hydrolysis of ginsenoside Rb1. Results: Among the mushrooms used in this study, the enzyme preparation from cultured mycelia of A. mellea (AMMEP) was found to convert ginsenoside Rb1 into compound K with a high yield, while those from G. lucidum, P. linteus, E. applanata, and P. ostreatus produced remarkable amounts of ginsenoside Rd from ginsenoside Rb1. The enzymatic hydrolysis pathway of ginsenoside Rb1 by AMMEP was $Rb1{\rightarrow}Rd{\rightarrow}F2{\rightarrow}$ compound K. The optimum reaction conditions for compound K formation from ginsenoside Rb1 were as follows: reaction time 72-96 h, pH 4.0-4.5, and temperature $45-55^{\circ}C$. Conclusion: AMMEP can be used to produce the human intestinal bacterial metabolite, compound K, from ginsenoside Rb1 with a high yield and without food safety issues.

독활(Aralia continentalis)로부터 생장억제물질(生長抑制物質)의 분리(分離) 및 동정(同定) (Separation and Identification of a Growth Inhibiting Compound from Aralia continentalis)

  • 김길웅;백경환
    • 한국잡초학회지
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    • 제10권3호
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    • pp.221-226
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    • 1990
  • 상치의 생물검정(生物檢定)을 통(通)해 독활로부터 생장억제물질(生長抑制物質)을 분해(分解) 동정(同定)한 결과(結果) Tlc상에서 $R_f$ 0.51로 나타났으며 이 물질(物質)은 상치생체중(生體重)을 70% 억제(抑制)하였으며 3% $FeCl_3$(0.5N HCL) 시약(試藥)에 검푸른 반응(反應)을 보여 phenol성(性) 물질(物質)로 확인(確認)되었고 324nm에서 가장 높은 UV 흡수대가 나타났고 IR spectrum에서 $3,600cm^{-1}$에서 OH기, $1,700cm^{-1}$에서 C=0, $1,600cm^{-1}$에서 C=C, $1,200cm^{-1}$에서 C-0결합(結合)이 확인(確認)되었다. HPLC에 의한 동정(同定) 결과(結果) retention time 25분(分)대의 ferulic acid($C_{10}H_{10}O_4$)와 일치(一致)하여 독활의 주(主) 억제물질(抑制物質)이 ferulic acid임을 확인(確認)하였다.

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