• 제목/요약/키워드: Biological Synthesis

검색결과 1,240건 처리시간 0.024초

모델 microspheres의 합성 및 bovine serum albumins의 흡착 연구 ((I) Synthesis of model microspheres and adsorption study of bovine serum albumine.)

  • 김중현;김우식
    • 대한의용생체공학회:학술대회논문집
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    • 대한의용생체공학회 1992년도 추계학술대회
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    • pp.157-160
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    • 1992
  • 표면에 여러 가지 기능성기를 가지는 microspheres는 immunoassay, drug delivery system, cell separation등 의용공학분야에 응용이 기대되고 있다. 이들 분야의 응용을 위하여 유화제를 사용하지 않으면서, 기존의 회분식, 반회분식, seed 중합법등의 문제점을 극복한 two stage shot growth technique올 개발하여 여러 가지 기능성기가 표면에 도입된 microspheres를 제조하였으며, 응용의 전단계로서 이들 microspheres에 대한 모델 단백질(BSA)의 흡착실험을 pH, 기능 성기의 종류와 양, BSA농도를 변수로 행하여 최대 흡착량을 보이는 조건을 결정하였다.

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Synthesis of Some Heterocycles of Potential Biological Activity

  • Ali-Harb, Abd-Elfattah;Mostafa, Fatma-H.;Metwally, Saoud-A.
    • Archives of Pharmacal Research
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    • 제13권2호
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    • pp.187-191
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    • 1990
  • A convenient method for the preparation of imidazobenzimidazole 3, imidazoimidazole 5, imidazotriazole 6 and pyrano [2, 3-c] oxazole 7 derivatives is described. This depends on interaction of 2-methyl-4-arylidene-2-oxazolin-5-ones 1 with o-diamines, thiosemicarbazide and/or ethylcyanoacetate. The effect of alcoholic potassium cyanide on axazolinone 1 was studied. Antibacterial activity of the obtained products was studied.

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Butein Disrupts Hsp90's Molecular Chaperoning Function and Exhibits Anti-proliferative Effects Against Drug-resistant Cancer Cells

  • Seo, Young Ho
    • Bulletin of the Korean Chemical Society
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    • 제34권11호
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    • pp.3345-3349
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    • 2013
  • Hsp90 shows great promise as a therapeutic target due to its potential to disable multiple signaling pathways simultaneously. In this study, we discovered that a natural product, butein moderately inhibited the growth of drug-resistant cancer cells (A2780cis and H1975), and brought about the degradation of oncogenic Hsp90 client proteins. The study demonstrated that butein would be a therapeutic lead to circumvent drug-resistance in cancer chemotherapy. The structure-based screening, synthesis, and biological evaluation of butein are described herein.

Synthesis and Biological Activity of Annulated Pyrazoles as Selective COX-2 Inhibitors. I.

  • Kim, Hyun-Hee;Park, Jae-Gyu;Moon, Tae-Chul;Chang, Hyun-Wook;Jahng, Yurng-Dong
    • Archives of Pharmacal Research
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    • 제22권4호
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    • pp.372-379
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    • 1999
  • A series of disubstituted 4,5-polymethylenepyrazoles were synthesized and evaluated their inhibitory activities against COX-2. Some compounds showed strong (0.3 nM) inhibitory activity on COX-2 and were found somewhat selective (up to 16) on COX-2 over COX-1.

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Synthesis and biological activity of 4,5-polymethylenepyrazole-derived HMG-CoA reductase inhibitors

  • Kim, Jin-Il;Choi, Young-Hee;Yurngdong Jahng
    • Archives of Pharmacal Research
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    • 제20권2호
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    • pp.158-170
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    • 1997
  • New HMG-CoA reductase inhibitors, in which 3-substituted 4, 5-polymethylenepyrazoles are employed as a hydrophobic anchor connected to tetrahydro-4-hydroxy-2H-pyran-2-one by a two-carbon bridge, were designed and synthesized to exhibit significant inhibitory activity comparable to mevinolin. The most potent enzyme inhibitor $(11cc, IC_{50}=0.01{\mu}M)$ is 4-fold more potent than lovastatin.

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Synthesis and Pharmacokinetic Profile of 3-Methoxymethyl Cephalosporin Prodrugs

  • Jung, Myung-Hee;Cho, Kui-Woong;Park, Jewn-Giew;Kim, Young-Hee
    • Archives of Pharmacal Research
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    • 제21권5호
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    • pp.559-564
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    • 1998
  • Preparation and biological activity of prodrug-type 3-methoxymethyl cephalosporins were described. From the mixtures, R- and S-prodrugs were separated and their absolute configurations were determined, and also their bioavailability was investigated.

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