• Title/Summary/Keyword: Korean sponge

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The Effect of Energy Transport using Capillary Pumped Loop with PVA sponge Wick (PVA 스폰지 윅을 갖는 Capillary Pump Loop의 에너지 전달효과)

  • Jun, C.H.;Jang, Y.S.;Kim, O.G.
    • Solar Energy
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    • v.19 no.2
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    • pp.21-28
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    • 1999
  • This study was carried out to investigate the effect of energy transport using capillary pumped loop with PVA sponge wick. The results obtained from this study are as follows. The configuration of capillary pumped loop was adequate and PVA sponge was of great use for the manufacture of capillary pump. The energy transport reached maximum when the working fluid amount was 750cc the wall temperature distribution indicated high values through out the entire length of the pipe. As the opening of a nozzle was increased, energy transport was increased but the effect was decreased.

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Silastic Molding Method for Pectus Excavatum Correction Using a Polyvinyl Alcohol (Ivalon) Sponge

  • Lee, Jun-Ho;Kim, Sung-Jin;Kang, Jeong-Ho;Chung, Won-Sang;Kim, Hyuck;Chon, Soon-Ho
    • Journal of Chest Surgery
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    • v.45 no.6
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    • pp.418-420
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    • 2012
  • Pectus excavatum is rare, but it is the most common type of sternal congenital disorder. There are many surgical methods to correct pectus excavatum such as the Ravitch method, Wada method, Silastic mold method, and the Nuss operation. We report a case of minimal invasive surgery for pectus excavatum using a polyvinyl alcohol sponge.

A New Glycerol Ether from a Marine Sponge Stelletta Species

  • Lee, Seung-Yeon;Zhao, Qingchun;Choi, Kyu-Teak;Hong, Jong-Ki;Lee, Dong-Seok;Lee, Chong-O.;Jung, Jee-H.
    • Natural Product Sciences
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    • v.9 no.4
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    • pp.232-234
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    • 2003
  • A new glycerol ether has been isolated from a marine sponge Stelletta sp. By bioactivity-guided fractionation. The structure was established on the basis of NMR and MS analyses. The compound was evaluated for cytotoxicity against a small panel of five human tumor cell lines and exhibited significant cytotoxicity.

Polyketides from a Sponge-Derived Fungus, Aspergillus versicolor

  • Lee, Yoon-Mi;Mansoor, Tayyab A.;Hong, Jong-Ki;Lee, Chong-O;Bae, Kyung-Sook;Jung, Jee-H
    • Natural Product Sciences
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    • v.13 no.1
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    • pp.90-96
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    • 2007
  • Bioactivity guided fractionation of the cultured filtrates of Aspergillus versicolor, which was derived from a marine sponge Petrosia sp., yielded three polyketides: decumbenones A (1),B (2), and versiol (3). These compounds were identified on the basis of 1D and 2D NMR spectroscopic and MS analysis. The absolute configuration was defined by the modified Mosher's method. The isolated compounds were tested for cytotoxicity against a panel of five human solid tumor cell lines and antibacterial activity against twenty clinically isolated methicillin-resistant strains. This is the first report on the isolation of these compounds from a marine source.

NMR Spectral Analysis of Steroids Isolated from the Sponge Penares incrustans (핵자기공명분광기를 이용한 해면동물 Penares incrustans에서 분리된 스테로이드 화합물의 분석)

  • 서영완
    • Journal of Aquaculture
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    • v.15 no.3
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    • pp.139-143
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    • 2002
  • Saringosterols have been isolated from the sponge Penares incrustans. The structure of these compounds have been determined by extensive 2-D NMR experiments such as $ ^1 H$ COSY, HMQC, and HMBC and by comparison with published data. Assignment for carbons of saringosterols for the first time has been done.

Terpenoids from Two Sponge Species of the Aegean Sea

  • Erdogan, Ilkay;Tanaka, Junichi;Higa, Tatsuo;Sener, Bilge
    • Natural Product Sciences
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    • v.5 no.4
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    • pp.177-180
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    • 1999
  • The ethanolic extracts of two shallow water sponge species collected from the Aegean Sea afforded thirteen terpenoids in total, two of which were determined to be new. The structure elucidation of the terpenoids was carried out by spectroscopic techniques and comparison with related authentic compounds. The terpenoids have also been assayed for antibacterial activity. This is the first report about the metabolites isolated from the marine sponges of the Aegean Sea in Turkey.

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A New Cyclitol Derivative from a Sponge Stelletta Species

  • Zhao, Qingchun;Liu, Yong-Hong;Hong, Jong-Ki;Lee, Chong-O.;Park, Jong-Hee;Lee, Dong-Seok;Jung, Jee-H.
    • Natural Product Sciences
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    • v.9 no.1
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    • pp.18-21
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    • 2003
  • Guided by the brine shrimp lethality assay, a new (4) and three known cyclitol derivatives (1-3) were isolated from the marine sponge Stelletta sp. Norsarcotride A (4) showed significant cytotoxicity against a small panel of five human tumor cell lines.

Alteuthoides affinis, a New Peltidiid Copepod (Harpacticoida) Associated with the Sponge from Cheju Island, Korea

  • Kim, Sa-Heung;Kim, Won
    • Animal cells and systems
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    • v.2 no.2
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    • pp.203-208
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    • 1998
  • A new species of harpacticoid copepod Alteuthoides affinis associated with the sponge Callyspongia elegans (Thiele) was collected from offshore waters of Cheju Island, Korea, and is described with illustrations. In this genus, only one species, A. kootare Hicks, has been known to occur in association with an hexacnellid sponge from New Zealand. The new species is similar to A. kootare in the general morphologies such as the shape of body, oral appendages, and thoraxic legs. However, it can be separated from A. kootare by the expanded genital double semite, P1 exopod bearing only one claw without reduced accessary nail, and acute rostrum.

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Some Trace Metals and their Ratios in Aloe (Aloe vera L.), Cucumber (Cucumis sativus L. var. tuberculatus Gabaj.) and Sponge-gourd (Luffa cylindrica L.) in Korea

  • Lee, Chang-Jun;Park, Jung-Sang;Jang, Gi-Chul;Kim, Sang-Deog A.
    • Korean Journal of Plant Resources
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    • v.22 no.6
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    • pp.540-545
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    • 2009
  • Aloe (Aloe vera L.), cucumber (Cucumis sativus L. var. tuberculatus Gabaj.) and sponge.gourd (Luffa cylindrica L.) are well utilized in Asian countries as traditional medicines and cosmetics, or foods. And we carried out an experiment to see if there are some specific ratios among trace metals on the plants. Though the metal concentrations varied significantly depending on the sampling periods, aloe gel is high in iron (Fe) and calcium (Ca). Cucumber fruit juice is also high in iron (Fe) and potassium (K). Sponge.gourd sap contains a high amount of zinc (Zn) and calcium (Ca). The uses of the previous 3 plant parts are considered to have some relations to their different ratios and of their trace metals.

Enantiomeric Compounds with Antileishimanial Activities from a Sponge, Plakortis sp

  • Lim, Chi-Won;Kim, Yeon-Kye;Youn, Ho-Dong;Park, Hee-Yeon
    • Journal of Applied Biological Chemistry
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    • v.49 no.1
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    • pp.21-23
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    • 2006
  • As part of a program to discover bioactive natural products from marine organisms, two new enantiomers, ent-3,6-Epidioxy-4,6,8,10-tetraethyltetradeca-7,11-dienoic acid and ent-[3,5-Diethyl-5-(2-ethyl-hex-3-enyl)-5H-furan-2-ylidene]-acetic acid methyl ether, were isolated from a sponge Plakortis sp. These compounds showed strong in vitro antiproliferative effects on promastigotes of Leishmania mexicania, flagellate protozoan that causes leishmaniasis. Structures were assumed by interpretation of NMR spectroscopic data and optical rotation. Both compounds exhibited significant antileishmanial activities in vitro with $IC_{50}$ of 1.0-23.0 ${\mu}g/ml$.