• 한국염색가공학회지
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• 제7권2호
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• pp.55-62
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• 1995

Plasma polymerization of Perfiuoropropene(PFP) and n-Hexane was carried out in a tubular type reactor by means of 13.56MHz radio frequency generator at the fixed RF discharge power of 25W and at the pressures of 100mTorr, 140mTorr and 200mTorr. The thin films were deposited on PAN fabrics in order to improve the dimemsional stability of woven states in hot water laundry. IR spectroscopy was used for the analysis of the structures of the thin films deposited and SEM for examination of surfaces of the fabrics. the PAN fabrics, which were coated by thin films at several experimental conditions, were immersed in boiling water for 2 hours and then the dimension stability of woven states were evaluated. In spite of very thin films, the results of surface modification were satisfactory. In general the performace of thin films by PFP was superior to that of n-Hexane.

• Natural Product Sciences
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• 제18권2호
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• pp.137-140
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• 2012

The aim of this research was to investigate the industrial application of Zanthoxylum schinifolium. Antibacterial activities of the n-hexane, methylene chloride (MC), ethyl acetate, and butanol fractions of Z. schinifolium were tested against Escherichia coli, Staphylococcus aureus and Helicobacter pylori. Among the fractions, the n-hexane and MC fractions showed the stronger antibacterial activity against H. pylori, with an inhibition zone greater than 10 mm in disc assays. Further testing of bergapten and lupeol from the MC fraction of Z. schinifolium revealed the antibacterial effects against E. coli, S. aureus and H. pylori, suggesting their potential use as antibacterial agents.

• Journal of the Korean Wood Science and Technology
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• 제14권3호
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• pp.30-35
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• 1986

To elucidate chemical structure of the wood extracitives, softwood Larix leplolepis Gorden) metal was extracted with 95% ethanol at room temperature for 72 hours. The extract was fractionated with organic solvents such as n-hexane, chloroform. ether, and ethylacetate. From the n-hexane soluble fraction of the extratives, flavonoid and sterol compounds were isolated and identified as taxifolin(5,7,3',4'-tetrahydroxyflavanonol)(I) and ${\beta}$-sitosterol(II) by UV, IR, $^1$H-NMR spectroscopy and Mass spectrometry.

• 대한화학회지
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• 제11권4호
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• pp.121-125
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• 1967

各種 아민과 할로겐化合物間의 Charge Transfer Complex 形成與否를 檢討하여 보았다. Pyridine Tridthylamine, Piperidine Ethanolamine Triethanolamine, Aniline, Diethylamine 等의 아민類와 四鹽化炭素 또는 클로로폼의 混合溶液을 n-Hexane 溶媒存在下에서 紫外線吸收 스펙트라를 檢査한 結果 장파장쪽의 Shift가 있었으며 特히 Diethylamine과 Triethylamine은 클로로폼 또는 四鹽化炭素와 1:1 Charge Transfer Complex를 形成하였고, Piperidine은 接觸的 Complex를 形成하는 것이 確認되었다. Complex의 形成경향과 아민의 Nucleophilicity와의 關係를 論議하였다.

• Journal of the Korean Wood Science and Technology
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• 제13권4호
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• pp.58-66
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• 1985

In order to elucidate chemical structure of the wood extractives, softwood (Pinus koraiensis Sieb. et Zucc.) meal was extracted with 95% ethanol at room temperature for 72 hours. The extract was fractionated with organic solvents such as n-hexane, ether, ethylacetate, and acetone. From the n-hexane and ether soluble fraction of the wood extractives, four flavonoid compounds were isolated and identified as 5-hydroxy-7-methoxyflavone (I), 5-methoxy-7-hydroxyflavone (II), 5-hydroxy-7-methoxyflavanone (III), and 5-methoxy-7-hydroxyflavanone (IV) by UV, IR, $^1$H-NMR spectroscopy and MS spectrometry.

• Plant Resources
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• 제8권2호
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• pp.103-109
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• 2005

Lettuce (Lactuca sativa L.) is known to contain water-soluble substances that improve antioxidant status due to the richness in antioxidants. Greenhouse experiment was carried out under different shading conditions during spring lettuce growing season. Shade significantly reduced shoot weight, number of leaves and chlorophyll content, while it increased shoot length of lettuce plants. The antioxidant potential of the individual fraction was in order of n-butanol > ethyl acetate > water > n-hexane fraction, although was less than that of commonly used antioxidants, BHT and ascorbic acid. Fractions from lettuce plants dose-dependently increased DPPH free radical scavenging activity, in vitro test. By means of HPLC analysis, BuOH fraction of cultivar 'Hwahyang' (57.93 mg $100g^{-1}$) had the highest amount of antioxidant chi orogenic acid. Shading treatment increased average amount of chlorogenic acid of all cultivars in BuoH, EtOAc, hexane and water fractions by 33, 120, 144, and $58\%$, respectively. These results suggest that lettuce plants had potent antioxidant activity, and their activities were differently exhibited depending on cultivar and fraction.

• Advances in Traditional Medicine
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• 제9권2호
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• pp.182-185
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• 2009

Amoora cucullata (Meliaceae), a mangrove plant, has folkloric reputation as a medicinal agent in Bangladesh. In this study, the n-hexane, ethyl acetate and methanolic extracts of the stem bark of this plant were subjected to microbiological investigation and brine shrimp lethality bioassay. In case of antimicrobial screening, the ethyl acetate and methanolic extracts appeared to be potent in terms of both zone of inhibition and spectrum of activity showing the average zones of inhibition 8 - 14 mm and 9 - 16 mm, respectively. In the brine shrimp lethality bioassay, the methanolic extract demonstrated highest cytotoxicity having $LC_{50}$ of $0.549{\mu}g/ml$, whereas the ethyl acetate and n-hexane extract showed $LC_{50}$ of 7.943 and $17.180{\mu}g/ml$, respectively.

• Natural Product Sciences
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• 제22권1호
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• pp.35-40
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• 2016

The first study on chemical constituents and biological activities of Clausena lansium (Lour.) Skeels (Rutaceae) growing in Vietnam has been done. Phytochemical investigation of n-hexane extract led to the isolation of five compounds: dihydroindicolactone (1), 8-geranyloxy psoralen (2), imperatorin (3), heraclenol (4) and indicolactone (5), in which this is the first report on the presence of dihydroindicolactone (1). Their structures were elucidated based on LC/MS/NMR hyphenated techniques as well as comparison with those of literature data. The n-hexane extract and its subfractions, ethanol 95% extract and several isolated compounds were evaluated for antifungal activity.

• 한국식품영양과학회지
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• 제30권5호
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• pp.900-905
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• 2001

본 연구에서는 들깨의 불용성 및 수용성 식이 섬유소의 함량을 측정하였으며 들깨의 methanol 추출물, hexane 추출물, MSF 및 식이 섬유소를 추출하여 항돌연변이 효과를 관찰하였다. 들깨의 총 식이 섬유소의 함량은 신선물인 경우 17.2%였고 건조물인 경우 18.2%였으며 이 가운데 94%가 불용성식이 섬유소였다. 들깨의 용매 추출물 중에서 methanol 추출물과 MSF는 AFB$_{1}$에 의해 유발된 돌연변이를 상당히 억제시켰으며 methanol 추출물과 MSF를 2.5mg/assay 첨가군에서 각각 91%와 87%의 억제효과를 나타내었다. 그러나 같은 농도에서 SDF의 첨가군은 억제효과가 나타나지 않았고 hexane 추출물은 20%의 억제효과를 나타내었다. 한편 직접 돌연변이원인 MNNG를 돌연변이원으로 사용한 경우에 항돌연변이 효과는 크게 나타나지 않았다. 즉 SDF를 1.25mg/assay 첨가한 군은 17%, MSF 2.5mg/assay 첨가군은 27%의 저해율을 보였을 뿐 methanol과 hexane 추출물 첨가군은 억제효과를 나타내지 않았다. 따라서 들깨의 용매 추출물은 간접 돌연변이원에 의한 돌연변이성을 억제시키는 것을 알수 있었다. 또한 불용성 식이 섬유소의 경우 Trp-P-2에 의해 유발된 돌연변이를 다소(13~18%)억제 하는것을 알 수 있다.

• KSBB Journal
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• 제29권5호
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• pp.343-352
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• 2014

In the present study, antioxidant activities of two crude pigments (acetone and MeOH) and their solvent fractions (n-hexane, 85% aq.MeOH, n-BuOH, and water fractions) from red crab shell were evaluated by measuring 1,1-diphenyl-2-picryl hydrazyl (DPPH), peroxynitrites, and degree of production of reactive oxygen species (ROS) in HT 1080 cells as well as the extent of oxidative damage of genomic DNA purified from HT 1080 cells. From comparative analysis, 85% aq.MeOH fraction showed the strongest scavenging effect on both peroxynitrite in vitro and intracellular ROS in HT 1080 cells. Protective activities of these samples against hydroxyl radical-mediated genomic DNA damage were also investigated. 85% aq.MeOH and n-BuOH fractions significantly inhibited oxidative damage of purified genomic DNA. On the other hand, we investigated their inhibitory effects on nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated Raw 264.7 cells. All samples significantly reduced NO production. Among the samples, n-hexane and water solvent fractions most effectively inhibited NO.