• Title/Summary/Keyword: solvent fraction

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Antifungal Activity of Methylene Chloride Fraction of Pimpinella brachycarpa Against Aspergillus niger (참나물 Methylene Chloride 분획의 Aspergillus niger에 대한 항진균 활성)

  • Ahn, Seon-Mi;Choi, Tae-Ho;Kwun, In-Sook;Sohn, Ho-Yong
    • Microbiology and Biotechnology Letters
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    • v.39 no.2
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    • pp.168-174
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    • 2011
  • In order to develop safe and economic novel antifungal agents, we prepared 73 methanol extracts from medicinal and edible herbs and examined their 365 solvent fractions using n-hexane, methylene chloride, ethylacetate, butanol and water residue based on the sequential organic solvent fraction method. When using the various fractions in the screening step for antifungal activity, we discovered ethylacetate fraction of Morus alba L., methylene chloride fraction of Pimpinella brachycarpa (MCPB), and n-hexane fraction of Salvia miltiorrhiza Bunge, which all have activities in methanol extracts, as potential sources of antifungal agents. Amongst these, the antifungal activity of P. brachycarpa has not to date been reported on. In addition, the mycelial growth inhibition and spore germination inhibition activities of MCPB against A. niger were confirmed by disc-diffusion assay in a 10 day culture. The MIC and MFC of MCPB were determined as 0.25 and 0.5 mg/ml, respectively. The MCPB has no hemolytic activity against human RBC at 0.5 mg/ml and glycoside-flavonoids are theorized to be active constituents. These results suggest that MCPB has a prominent antifungal activity and that the application of sequential organic solvent fractions, instead of simple natural product extracts, is useful in the screening process of novel bioactive substances.

Extraction and Purification of Bioactive Materials from Agaricus blazei Fruiting Bodies (아가리쿠스 버섯에서 생리활성물질의 추출 및 정제)

  • 최정우;류동열;김영기;홍억기;권명상;한진수
    • KSBB Journal
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    • v.15 no.3
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    • pp.293-298
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    • 2000
  • ${\beta}$-Glucan a kind of polysaccharide which is particularly abundant in Agaricus blazei is known as the bioactive materials especially anticancer agents. The process development of the isolation and the purification process of water soluble ${\beta}$-glucans from A. blazei was achieved. and the process operation variables were optimized. Crude polysaccharides (CR.PS) were obtained from A. blazei by hot water extraction filtration solvent precipitation dialysis and freeze drying. Neutral and acidic fraction of polysaccharides were separated from crude polysaccharides by ion chromatography and then high molecular weight and low molecular weight fraction were separated from neutral fraction by gel chromatography. Quantitative and qualitative analysis of each compounds were performed with FT-IR NMR spectroscopy. Based on these analysis the optimal conditions of temperatures operating time organic solvent volume for precipitation and dialysis time were determined.

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Antimicrobial Activities of Zonthoxylum schinifolium and Zanthoxylum piperitum Leaves (산초와 초피 잎의 항균활성)

  • Kim, Jeong;Cho, Young-Soo;Seo, Kwon-Il;Joo, Ok-Soo;Shim, Ki-Hwan
    • Food Science and Preservation
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    • v.7 no.2
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    • pp.195-200
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    • 2000
  • Yields of various solvent extracts for Zanthoxylum schinifolium and Z. piperitum leaves were higher in ethanol extract layer. Ethanol Extract in sancho and chopi leaves was fractionated with different solvents, such as hexane, chloroform, ethyl acetate, butanol and water, yields of hexane fraction was higher. In the solvent extracts using methanol, ethanol, hexane, chloroform, and water, ethanol extract showed the most effective antimicrobial activities. Ethanol extract in sancho and chopi leaves was fractionated, the most antimicrobial activities of sancho leaf were ethyl acetate fraction, and chopi leaf were chloroform fraction.

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Antimicrobial and Antioxidative Activities of Solvent Fractions of Quercus mongolica Leaf (신갈나무 잎의 용매분획별 항균 및 항산화 효과)

  • 오덕환;공영준;강태수;이명기;박부길
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.30 no.2
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    • pp.338-343
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    • 2001
  • The ethanol extract of Quercus mongolica leaf was fractionated by various organic solvents, and their antimicrobial and antioxidative activities were investigated against several microorganisms. The ethanol extract of Quercus mongolica leaf at two thousand $\mu\textrm{g}$ per disc showed 17~21mm inhibition zone against Gram postive and Gram negative bacteria. Among the various solvent fractions from ethanol extract of Quercus mongolica leaf, the hexane fraction showed the strongest antimicrobial activity. Minimal inhibitory concentration (MIC) of hexane fraction was 250$\mu\textrm{g}$/mL against Bacillus cereus, 250~500$\mu\textrm{g}$/mL against Listeria monocytogenes, 500$\mu\textrm{g}$/mL against Staphylococcus aureus, Salmonella typhimurium, Escherichia coli O157, and Pseudomonas aeruginosa. Also, the hexane and chloroform fraction had the similar antioxidative activity compared to that of butylated hydroxy toluene(BHT).

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DNA Damage Protection and Anti-inflammatory Activity of Different Solvent Fractions from Aruncus dioicus var. kamtschaticus

  • Zhang, Qin;Kim, Hye-Young
    • Korean Journal of Plant Resources
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    • v.27 no.6
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    • pp.714-719
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    • 2014
  • This study investigated DNA damage protection and anti-inflammatory activity of different solvent fractions from Aruncus dioicus var. kamtschaticus (A. dioicus) aerial parts water extract. As for DNA damage protection, distilled water ($H_2O$) fraction displayed the most powerful protection for DNA damage at a concentration of 1 mg/ml. As for anti-inflammatory activity, dichloromethane ($CH_2Cl_2$) fraction exhibited the highest NO inhibition activity, ranging from 61% to 19% ($10-40{\mu}g/ml$). Furthermore, the levels of pro-inflammatory cytokines mRNA expressions and intracellular reactive oxygen species (ROS) were employed to verify the anti-inflammatory activity of the $CH_2Cl_2$ fraction on further researches. It could be concluded that A. dioicus had a significantly effect of DNA damage protection and anti-inflammatory activity which also as an essential edible vegetable and medicinal species.

Compatibility at Polymer/Polymer Mixture Interfaces in the Presence of Solvent

  • Yoon, Kyung-Sup;Park, Hyung-Suk;Lee, Jo-Woong;Chang, Tai-Hyun
    • Bulletin of the Korean Chemical Society
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    • v.15 no.3
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    • pp.214-221
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    • 1994
  • We present some results obtained from theoretical study on a non-symmetrical A/BC polymeric system including solvent which consists of two phases, a polymeric phase A on one side and a mixture of polymers B (as a compatibilizer) and C on the other in the presence of a solvent. By employing the functional integral techniques we derive the mean-field equations and solve them numerically to deduce the physical properties of the interface involving the polymers and solvent concentration profiles in the limit that molecular weights of all the polymers involved tend to infinity. The calculations are performed for typical values of the Flory interaction parameters and for the volume fraction of polymer B in the asymptotic phase and of solvent. In the polymers/solvent blend under consideration the interfacial adsorption of polymer B, the solvent concentration, and degrees of the specific interaction between the polymers are found to play important roles in modification of the interfacial properties.

Solvent Fractionation of Sardine Oil and Utilization of Fractionated Oils (정어리유(油)의 용매분별과 분별유(油)의 이용)

  • Lee, Young-Chul;Kim, Young-Boong;Kim, Kee-Sung
    • Journal of the Korean Applied Science and Technology
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    • v.6 no.2
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    • pp.11-19
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    • 1989
  • In order to fractionate sardine oil by different solvents for an effective use of fish oil being subjected to the limit of use, an attempt was to investigate the proper solvents, ratios and fractionation time. The results of the study were as follows: 1. The proper solvent of fractionation using ethanol, isopropyl alcohol, acetone, and hexane was ethanol, and its optimum ratio was 2:1 (ethanol: oil, v/w). The proper time of ethanol fractionation by the ratio (2:1) was 4hr at $10^{\circ}C$, 6hr at $5^{\circ}C$, 8hr at $0^{\circ}C$and 8hr at $-5^{\circ}C$, respectively. 2. In the fractionation by stages using the ratio (2:1) at each temperature, the yield of stearine was 8% at $10^{\circ}C$ (Fraction I), 32% at $5^{\circ}C$ (Fraction II), 7% at $0^{\circ}C$ (Fraction III) and 10% at $0^{\circ}C$ (Fraction IV), respectively. When ethanol fractionation was undertaken at $5^{\circ}C$ by stages, the yield of stearine (Fraction II) was high. 3. Iodine value of Fraction II was 96.8. This result indicated that the hydrogenation process would be simplified by fractionation. 4. The percentage of the decrease of polyenoic acids from original sardine oil to Fraction II oil was from 30.5% to 13.5%. The major fatty acids of Fraction II were palmitic and oleic acids and these fatty acids were about 52% of total fatty acids. Therefore, Fraction II, which remained liquid oil at room temperature because solid fat content was 6.9% at $20^{\circ}C$, would be used as frying oil.

Radical Scavenging Activity of Ethanol Extracts and Solvent Partitioned Fractions from Various Red Seaweeds (홍조류 에탄올 추출물 및 다양한 용매 분획물의 라디칼 소거능)

  • Cho, MyoungLae;Lee, Dong-Jin;You, SangGuan
    • Ocean and Polar Research
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    • v.34 no.4
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    • pp.445-451
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    • 2012
  • The EtOH extracts of red seaweeds (Symphyocladia latiuscula, Chondrus ocellatus and Carpopeltis affinis) and solvent partitioned fractions were investigated for their 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 1,1-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging effects and the total phenolic contents were correlated with ABTS and DPPH radical scavenging activities. The EtOH extracts and their solvent partitioned fractions exhibited strong ABTS and DPPH radical scavenging activities. Among the solvent partitioned fractions obtained from n-Hexane (HX), methylenchloride (MC), ethylacetate (EA), and buthanol (BuOH), the HX fraction from C. affinis showed higher radical scavenging activities than other fractions. Total phenolic contents showed significant correlation ($r^2$ = 0.709) with ABTS radical scavenging activity. The results of this study suggest that the strong radical scavenging activity of HX fraction from C. affinis is a promising natural antioxidant for healthcare products.

Nitrite scavenging and lipid peroxidation inhibitory effects of solvent fractions from Phragmites communis rhizome extract (갈대(Phragmites communis) 뿌리 추출물로부터 얻어진 용매 분획물의 아질산염 소거 및 지질과산화 억제 효과)

  • Man-Jin In;Nam-Soon Oh;Dong Chung Kim
    • Journal of Applied Biological Chemistry
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    • v.65 no.4
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    • pp.453-456
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    • 2022
  • Phragmites communis rhizome (Phragmitis rhizoma) was extracted with 70% ethanol, and then the extract was fractionated sequentially using n-hexane, chloroform, and ethyl acetate as solvents. Among the solvent fractions of Phragmitis rhizoma extract, the polyphenol content in ethyl acetate fraction was the highest. The chloroform and ethyl acetate fractions possessed a good nitrite scavenging activity. In addition, each solvent fraction showed an effective lipid peroxidation inhibitory ability at a concentration of 10 mg/mL.

Comparison of Methanol with Formamide on Extraction of Nitrogen Heterocyclic Compounds Contained in Model Coal Tar Fraction (모델 콜타르 유분 중에 함유된 질소고리화합물의 추출에 관한 메탄올과 포름아마이드의 비교)

  • Kim, Su Jin
    • Applied Chemistry for Engineering
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    • v.26 no.2
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    • pp.234-238
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    • 2015
  • The separation of nitrogen heterocyclic compound (NHC) contained in a model coal tar fraction was compared by the methanol and formamide extraction. The model coal tar fraction comprising four kinds of NHC (NHCs : quinoline, iso-quinoline, indole, quinaldine) and three kinds of bicyclic aromatic compound (BACs : 1-methylnaphthalene, 2-methylnaphthalene, dimethylnaphthalene), biphenyl and phenyl ether was used as a raw material. The aqueous solution of methanol and formamide were used as solvents. A batch-stirred tank was used as the raw material - a solvent contact unit of this work. Independent of the solvent used, the distribution coefficient of NHCs sharply increased by decreasing the initial volume ratio of water to the solvent and increasing the equilibrium operation temperature, whereas, the selectivity of NHCs in reference to BACs decreased. Decreasing the initial volume ratio of solvent to feed resulted in deteriorating distribution coefficients, but the selectivity of NHCs in reference to BAC was almost the constant. The distribution coefficient of NHCs by the methanol extraction was 3~5 times higher than that of NHCs by the formamide extraction, inversely, the selectivity of NHCs based on BACs by the formamide extraction was 3~7 times higher than that of NHCs by the methanol extraction. Furthermore, two different solvent extraction methods by adding the extraction processing speed to the balance between solvency and selectivity of NHCs were compared.