• ALGAE
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• v.21 no.3
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• pp.343-348
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• 2006

This study was conducted to screen in vitro angiotensin - I converting enzyme (ACE) inhibitory activities of methanol (MeOH) and aqueous extracts at 20°C and 70°C, respectively, prepared from twenty-six red algae obtained from the coast of Jeju Island in Korea. Among aqueous extracts at 20°C (20AE) from red algae Lomentaria catenata showed the strongest ACE inhibitory activity and Lithophyllum okamurae recorded the second highest activity. From MeOH extract at 20°C (20ME) Ahnfeltiopsis flabelliformis possessed the strongest ACE inhibitory activity. Remarkable activities from MeOH extracts at 70°C (70ME) were observed in Grateloupia filicina, Sinkoraena lancifolia and Grateloupia lanceolata. However, no significant activity was found in aqueous extracts at 70°C (70AE). The IC50 values, which are concentrations required to inhibit 50% activity of ACE, for ACE inhibitory activities of 20AE from Lithophyllum okamurae and L. catenata were 13.78 and 12.21 μg mL–1, respectively. The IC50 values of 20ME from A. flabelliformis and Laurencia okamurae were 13.84 and 106.15 μg mL–1. Those of the 70ME from Bonnemaisonia hamifera, Grateloupia filicina, Sinkoraena lancifolia, G. lanceolata, Gracilaria vermiculophylla and L. okamurae ranged from 25.82 to 124.69 μg mL–1.

• Bulletin of the Korean Chemical Society
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• v.18 no.12
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• pp.1301-1304
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• 1997

Elimination reactions of (E)-2,4-dinitrobenzaldehyde O-pivaloyloxime promoted by R2NH/R2NH2+ buffer in 70% MeCN(aq) have been studied kinetically. The reaction exhibited second order kinetics and general base catalysis with Bronsted β=0.45. The Hammett ρ value decreased from 2.3 to 1.6 as the base-solvent system was changed from DBU in MeCN to R2NH/R2NH2+ buffer in 70% MeCN(aq). From these results an E2 mechanism is proposed.

• Korean Journal of Poultry Science
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• v.34 no.1
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• pp.53-56
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• 2007

An experiment was conducted to investigate the effect of ME and crude protein (CP) content of diet on the performance and production cost of white semibroiler chickens. Three hundred sixty hatched white semibroiler chickens (Hy-Line $female\;{\times}\;Ross^{(R)}$ male) were assigned to low dietary treatments of different metabolizable energy (ME) value and crude protein (CP) content: T1; ME 3,040 and 3,070 kcal/kg, CP 21.40 and 20.86%, T2; ME 2,950 and 3,000 kcal/kg, CP 20.62 and 19.70%, T3; ME 2,950 and 3,000 kcal/kg, CP 19.90 and 18.70% and T4; ME 2,900 and 2,920 kcal/kg, CP 18.50 and 18.00% for starter diet ($0{\sim}1st$ wk) and power diet ($2{\sim}5th$ wk), respectively There were significant (P<0.01) differences among treatments in weight gain, feed intake and feed conversion ratio. T1 was significantly higher in weight gain and feed intake and love. in feed conversion ratio than other treatments. Production index of T1 (153.42) was far greater than T2 (112.13), T3 (108.40) and T4 (100.95). It was concluded that semibroilers required similar ME and CP to those of regular commercial broilers (highbro).

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.10
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• pp.1318-1322
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• 2008

The aim of this study was to analyze the antioxidant properties of Lycii folium extracts prepared from different solvents. Lycii folium were extracted with water, 80% ethanol (80% EtOH), 80% methanol (80% MeOH) and 100% methanol (100% MeOH) in water bath at $40^{\circ}C$. The antioxidant activity of the extracts was evaluated using DPPH, hydroxyl and hydrogen radical scavenging activities, and SOD-liked activity. Total phenolic acid contents were 1.085 mg/mL in 100% MeOH, 1.382 mg/mL in 80% EtOH, 1.420 mg/mL in 80% MeOH and 1.084 mg/mL in water. DPPH radical scavenging activity of the extracts were 65.60% in 80% EtOH, 56.80% in 80% MeOH, 83.85% in 100% MeOH and 54.65% in water. Hydroxyl radical scavenging activities were 66.65% in 100% MeOH, 73.13% in 80% ethanol, 73.58% in 80% MeOH and 70.73% in water. Hydrogen radical scavenging activity of the extracts prepared from Lycii folium were 11.70% in 100% MeOH, 33.73% in 80% EtOH, 35.40% in 80% M eOH and 23.86% in water. SOD-liked activity of the extracts prepared from Lycii folium was 71.58% in 100% MeOH, 74.29% in 80% EtOH, 88.46% in 80% MeOH and 67.47% in water. Our result showed that Lycii folium extracts prepared from 80% methanol were found to be promising biomaterials with antioxidant effects.

• Nutrition Research and Practice
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• v.1 no.3
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• pp.189-194
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• 2007

This study investigated in vitro antioxidant activity of Sonchus oleraceus L. by extraction solvent, which were examined by reducing power, hydroxyl radical-scavenging activity(HRSA) and 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assays. 70% MeOH extract had the greatest reducing power while EtOH extract had the greatest HRSA. The antioxidant activity of S. oleraceus extracts was concentration dependent and its $IC_{50}$ values ranged from 47.1 to $210.5\;{\mu}g/ml$ and $IC_{50}$ of 70% MeOH, boiling water and 70% EtOH extracts were 47.1, 52.7 and $56.5\;{\mu}g/ml$, respectively. 70% MeOH extract of S. oleraceus contained the greatest amount of both phenolic and flavonoid contents. The extracts tested had greater nitrite scavenging effects at lower pH conditions. The cytotoxic activity showed that EtOH extract had the best activity against the growth of stomach cancer cell. These results suggest that S. oleraceus extract could be used as a potential source of natural antioxidants.

• The Korea Journal of Herbology
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• v.23 no.2
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• pp.213-223
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• 2008

Objectives : This study was performed to prove the hypotensive effect of 70% MeOH extracts from Scrophularia buergeriana (SB) on rat's femoral artery. Methods : We observed hypotensive effect of SB on rat's femoral artery. Scrophularia buergeriana Miquel, S. kakudensis, S. koraiensis and S. ningpoenesis Hemsl. were used by the RFLP method and sequence analysis of ITS regions, in order to compare and discriminate. Results : SB 70% MeOH Ex., Water fraction, 40% MeOH fraction, 100% MeOH fraction didn't show significantly hypotensive effect. 20% fraction of SB 70% MeOH Ex. showed significantly hypotensive effect. The size of ITS region on Scrophularia sp. is 589${\sim}$590bp and amount of G+C is 59.3% to 59.7%, and it showed the similar of ITS parts on Scrophularia sp. Conclusions : We concluded that SB Ex. have hypotensive activity, and it's more efficient when separated. And Scrophularia sp. showed the similar of DNA analysis.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.49 no.1
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• pp.9-16
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• 2023

In this study, we tried to verify the value of the use of Mucuna pruriens (M. pruriens) extract as an antioxidant functional cosmetic material based on natural materials. After extracting, concentrating, and freeze-drying M. pruriens with water, 70% ethanol, and 70% acetone as solvents, samples of powdered hydrothermal extract (MW), 70% ethanol extract (ME), and 70% acetone extract (MA) were prepared. As a result of analyzing antioxidant activity through DPPH radical scavenging activity, ABTS⁺ radical scavenging activity, SOD-like activity, reduction ability, total phenol and flavonoid content analysis using MW, ME, and MA, all showed excellent antioxidant effects. Therefore, it is believed that M. pruriens extract is highly likely to be used as a natural material for antioxidant-related functional cosmetics.

• Korean Journal of Pharmacognosy
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• v.41 no.4
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• pp.250-254
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• 2010

This study was presented to the physiological activities such as metal chelating capacity, superoxide dismutase-like activity, anti-inflammation, cytotoxicity from Zanthoxylum schnifolium fruit. The values for metal chelating capacity of 1 mg/mL of 70% EtOH and 70% MeOH extracts were 68% and 67%, respectively, it was shown that metal chelating capacity in a dose-dependent manner. The 100% EtOH and 100% MeOH extract exhibited strong superoxide dismutase-like activity. The highest SOD-like activity obtained from 100% EtOH was 51% at a concentration of 4 mg/mL. The all extracts of Zanthoxylum schnifolium fruit except $H_2O$ extract significantly decreased the concentration of LPS-induced NO in Raw 264.7 cells. The 100% EtOH, 100% MeOH and 70% EtOH extract represented the highest activity in the anti-inflammation properties in vitro. However, the 100% EtOH and 100% MeOH extracts has cytotoxicity in Raw 264.7 cells and it may affect cell viability. Conclude that 70% EtOH extract was most suitable for anti-inflammation. Our results revealed that the Zanthoxylum schnifolium fruit expected to physiological activities.

• Journal of Embryo Transfer
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• v.21 no.3
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• pp.247-253
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• 2006

본 연구는 안정된 돼지 체외 성숙 난자를 얻을 목적으로 배양액의 종류 및 배양액에 EGF, ${\beta}-ME$, 호르몬 첨가가 돼지 난포란의 체외 성숙에 미치는 영향을 조사하였다. 난포란을 TCM-199, NCSU-23 및 PZM-3으로 48시간 배양했을 때 체외 성숙율은 각각 $22.1{\pm}0.70%,\;30.6{\pm}0.70%$ 및 $30.4{\pm}2.82%$였다. TCM-199로 48시간 배양했을 때 체외 성숙율은 NCSU-23 및 PZM-3 보다 약간 낮은 체외 발생율을 나타냈다. 난포란을 25 ng/ml의 EGF를 첨가한 TCM-199, NCSU-23 및 PZM-3로 48시간 배양했을 때 체외 성숙율은 각각 $46.3{\pm}2.8%,\;76.6{\pm}3.1%$ 및 $72.2{\pm}2.6%$로 나타났다. 난포란의 배양 시 배양액에 25 및 50 ng/ml의 EGF를 첨가 후 48시간 배양했을 때 첨가하지 않은 군에 비해 높은 체외 성숙율을 나타냈다(p<0.05). 난포란을 NCSU-23 및 PZM-3 배양액에 $25{\mu}M/ml$의 ${\beta}-ME$를 첨가한 후 48시간 배양했을 때 체외성숙율은 각각 $43.9{\pm}1.41%,\;41.7{\pm}l.41%,\;44.4{\pm}0.70%,\;40.6{\pm}0.70%$로 나타났다. 난포란을 $25{\mu}M/ml$의 ${\beta}-ME$를 첨가한 NCSU-23로 48시간 배양했을 때 첨가하지 않은 군에 비해 높은 체외 성숙율을 나타냈다(p<0.05). 난포란의 배양 시 NCSU-23에 PMSG, hCG, PMSG+hCG, hCG+${\beta}$-estradiol, PMSG+${\beta}$-estradiol을 첨가 후 배양하였을 때 체외 성숙율은 각각 75.6%, 77.8%, 80.0%, 86.4% 및 84.8%로서 무첨가 군(64.4%)에 비해 높게 나타났다(p<0.05).

• Korean Journal of Pharmacognosy
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• v.42 no.3
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• pp.282-287
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• 2011

This study was presented to the anti-cancer activity from different fraction of Zanthoxylum schnifolium fruits. The values for human colon cancer cell(HT-29) survival rate of 0.3 mg/mL of 70% EtOH and 70% MeOH ethyl acetate fraction extracts were 7.62${\pm}$0.173%, 7.66${\pm}$0.037%, respectively. It was shown that human colon cancer cell(HT-29) survival rate was in a dose-dependent manner. The percentages of cells were increased in the sub-G0 and G0/G1 phase region, meaning that cell proliferation was decreased. The RT-PCR demonstrated that 70% EtOH and 70% MeOH ethyl acetate fraction extracts were down-regulated the expression of Bcl-2 and survivin genes in HT-29 cells. We examined that 70% EtOH and 70% MeOH ethyl acetate fraction extracts anti-cancer activities initiated through ROS generation suggesting that HT-29 cells treated with ethyl acetate fraction extracts induced ROS generation. Our results revealed that the Zanthoxylum schnifolium fruit may expect for anti-cancer activities in HT-29 cells.