• 제목/요약/키워드: Medicinal resource

검색결과 473건 처리시간 0.036초

Highly Enantioselective Addition of Diethylzinc to Aldehydes Catalyzed by Novel Chiral tert-Amino Alcohols

  • Zhang, Cong-Hai;Yan, Sheng-Jiao;Pan, Sheng-Qiang;Huang, Rong;Lin, Jun
    • Bulletin of the Korean Chemical Society
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    • 제31권4호
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    • pp.869-873
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    • 2010
  • A series of novel chiral tert-amino alcohols 4a-h derived from enantiomerically pure phenylalanine were synthesized efficiently and used as chiral ligands in the catalytic enantioselective ethylation of aldehydes with diethylzinc (diethylzinc-to-aldehyde addition). The use of 10 mol % of the amino alcohols led to the corresponding sec-alcohols with excellent enantioselectivities (up to 100% ee) and high yields.

Effect of Benzalkonium Chloride on Percutaneous Absoption of Antisense Phosphorothioate Oligonucleotides

  • Lee, Young-Mi;Lee, Sung-Hee;Ko, Geon-Il;Kim, Jae-Baek;Sohn, Dong-Hwan
    • Archives of Pharmacal Research
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    • 제19권6호
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    • pp.435-440
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    • 1996
  • The effect of benzalkonium chloride on skin permeability of partially modified antisense phosphorothioate oligonucleotides (PS-ODN), which are designed as scar formation inhibitor, was investigated using Franz Diffusion Cell. When the concentration ratio of PS-ODN-quarternary ammonium salt complex is more than 1:100, the apparent partition coefficient (APC) of each complex was increased in the following order; tetraphenyl phosphonium chloride (TPP) < cetyltrimethyl ammonium bromide(CTAB) < benzalkonium chloride (BZ). The permeability of PS-ODN through the rat skin increased in the presence of BZ. The fluxs of PS-ODN with BZ were increased by addition of Pluronic F 68 or Triton X-100 to phosphate buffered saline (PBS), respectively. When the mole ratio of PS-ODN to BZ is 1:10, the fluxs penetrated of PS-ODN with BZ was greatest. The increase of the permeability in the presence of BZ might be due to the formation of lipophilic ion-pair complex between PS-ODN and BZ. By regulation of mole ratio of PS-ODN to BZ, the development of topical dosage forms using PS-ODN as scar formation inhibitor will be possible with minimal systemic exposure.

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Three New Oleanane-Type Triterpene Saponins from Gladiolus gandavensis

  • Tai, Zhi-Gang;Cai, Le;Yang, Ya-Bin;Liu, Chuan-Shui;Xia, Jian-Jun;Ding, Zhong-Tao
    • Bulletin of the Korean Chemical Society
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    • 제31권10호
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    • pp.2786-2790
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    • 2010
  • Three new oleanane-type triterpene saponins (1, 2 and 3) were isolated from aerial parts of Gladiolus gandavensis, along with two known compounds (4 and 5). Their structures were elucidated as 29-O-($\beta$-D-glucopyranosyl)-$2{\beta}$,$3{\beta}$-dihydroxyolean-12-en-28-oicacid(1), 3-O-($\beta$-D-xylopyranosyl)-29-O-($\beta$-D-glucopyranosyl)-12-en-28-oic acid (2), and $2{\beta}$,$3{\beta}$,29-trihydroxyolean-12-en-28-oic acid 28-O-[$\beta$-D-glucopyranosyl($1{\rightarrow}2$)-($\alpha$-L-rhamnopyranosyl($1{\rightarrow}6$))-$\beta$-D-glucopyranosyl] ester (3), by spectroscopic methods, and by comparison with known analogues. These oleanane-type triterpene saponins glycosidated at C-29 were not obtained frequently.

사료내 약용식물(인진쑥, 오가피 및 마늘)의 첨가가 포유돈, 포유자돈 및 이유자돈의 성적 및 혈청특성에 미치는 효과 (Effect of Supplemental Medicinal Plants(Artemisia, Acanthopanax and Garlic) on Growth Performance and Serum Characteristics in Lactating Sows, Suckling and Weanling Pigs)

  • 권오석;유종상;민병준;손경승;조진호;김해진;진영걸;김인호
    • Journal of Animal Science and Technology
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    • 제47권4호
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    • pp.501-512
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    • 2005
  • 본 시험은 약용식물(인진쑥, 오가피, 마늘)의 사료내 첨가가 모돈의 생산성, 포유자돈의 성장율 및 이유자돈에서의 성적 및 혈청 특성에 미치는 영향을 알아보고자 실시하였다. 시험 1은 3~5산차의 임신 모돈 48두를 공시하여 각각 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2(basal diet added 0.1% of medicinal plant mixtures) 그리고 4) MP3(basal diet added 0.2% of medicinal plant mixtures)로 하여 처리구당 12두씩 배치하여 21일동안 실시하였다. 시험 기간동안 포유모돈의 일당 사료섭취량은 약용식물을 0.1% 첨가한 처리구가 0.2%를 첨가한 처리구보다 유의적으로 높게 나타났다(P<0.05). 포유자돈의 개시시와 이유시의 체중 변화에서는 약용식물을 0.05% 첨가한 처리구가 대조구에 비하여 유의적으로 증가하는 경향을 보였다 (P<0.05). 혈액내 glucose의 함량에서는 MP3 처리구가 대조구에 비하여 유의적으로 높게 나타났다(P<0.05). 시험 2는 개시시 체중 4.70$\pm$0.63kg의 3원교잡종(Landrace$\time$Yorkshire$\time$Duroc) 이유자돈 120두를 공시하여 20일간 사양시험을 실시하였다. 시험설계는 옥수수-대두박 위주의 사료로서 NRC(1998)의 영양소 요구량에 따라 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2(basal diet added 0.1% of medicinal plant mixtures) 그리고 4)MP3(basal diet added 0.15% of medicinal plant mixtures)의 4개의 처리구로 하여 처리당 6반복, 반복당 5두씩 완전임의 배치하였다. 전체시험기간 동안의 이유자돈의 일당증체량(linear, P<0.067)과 사효효율(linear, P<0.018)에서는 약용식물을 첨가함으로서 증가하는 경향을 보였으며, 사료섭취량(linear, P<0.018)에서는 감소하는 경향을 보였다. 건물의 소화율에서는 약용식물을 첨가함에 따라 증가하는 경향을 보였다(linear, P<0.004; quadratic, P<0.03). 결론적으로 포유모돈 사료내 약용식물의 첨가는 0.1%까지 첨가 급여시가 모돈의 체손실 감소 및 포유자돈의 증체량의 향상을 가져 왔으며, 이유자돈에서는 약용식물을 0.05-1.0% 첨가시 자돈의 성장율 및 건물의 소화율을 개선시키는 결과를 보였다.

충남 미호천 일대 약용식물의 생태적 분포 (Ecological Distribution of Medicinal Plants in Miho Stream, Korea)

  • 송홍선;서정석;남윤규;안영섭;박충범;김성민
    • 한국약용작물학회지
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    • 제19권6호
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    • pp.407-413
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    • 2011
  • This study was analyzed and investigated to evaluate ecological distribution of medicinal plants in Miho Stream of Korea. Totality 463 taxa of vascular plants were appeared in lower part of Miho Stream. Medicinal plants were distributed 253 taxa, which were 54.6% of the total vascular plants appeared. Medicinal plants of official drug compendium(Korean pharmacopoeia) were 85 taxa. Medicinal plants were distributed most of the forest area, and followed field surrounding, stream surrounding and paddy surrounding respectively. The distribution of life form hemicryptophyte was the most frequent. Plant community of appearing area of medicinal plants was classified into Salix koreensis, Phragmites japonica, Echinochloa crusgalli, Artemisia selengensis, Miscanthus sacchariflorus, Setaria faberii, Panicum dichotomiflorum, Bidens frondosa, Humulus japonicus, Monochoria vaginalis var. plantaginea, Eleocharis kuroguwai, Erigeron acris, Pinus densiflora, Pinus rigida, Quercus acutissima, Quercus serrata, Robinia pseudoacacia and Castanea crenata community. Medicinal plants in plant communities that occur frequently were Humulus japonicus, Corylus heterophylla and Liriope spicata.

Three Component Solvent-free Synthesis of Chroman-2,4-dione-based Heterocyclic Ketene Aminal (HKA) Derivatives by "GAP" Chemistry

  • Yu, Fu-Chao;Hao, Xiao-Pan;Jiang, Xiu-Yang;Yan, Sheng-Jiao;Lin, Jun
    • Bulletin of the Korean Chemical Society
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    • 제35권6호
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    • pp.1625-1632
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    • 2014
  • A concise and efficient one-pot synthesis of chroman-2,4-dione-based HKA derivatives by three component reaction of HKAs, triethoxymethane and 4-hydroxycoumarin derivatives under solvent-free and catalyst-free conditions is described. This protocol has many advantages, in that the GAP (Group-Assistant-Purification) chemistry process is involved in this method. As a result, the experimenter can avoid cumbersome process steps such as traditional chromatography and recrystallization purifications. The desired products can be easily obtained by washing the crude products with 95% EtOH.