The study was performed for elucidating angiotensin converting enzyme (ACE) inhibitory activity and comparing antioxidative activity of Panax ginseng extracts prepared at different conditions. Total phenolic content, inhibitory activity on ACE and antioxidative effects were tested on 10 ethanolic extracts and correlation coefficient between total phenolic content and physiological activity was calculated. Yield and total phenolic content of 50% ethanolic extract prepared at $85^{\circ}C$ exhibited the highest value as 42.52% and 0.82%, respectively. Among the fractions obtained from 50% ethanolic extract prepared at room temperature, water fraction showed the highest value in yield as 72.08% and ethyl acetate fraction did in total phenolic content as 6.59%. In the test on ACE inhibitory activity, 50% ethanolic extract obtained at room temperature indicated the strongest effect of 93.8% which was higher than 85.2% of commercialized ACE inhibitor and solvent fractions showed potent inhibitory activity in order of hexane fraction, diethyl ether fraction, ethyl acetate fraction, butanol fraction and water fraction at concentration of $4000{\mu}g/ml$. 50% Ethanolic extract prepared at $85^{\circ}C$ had the most potent inhibition effect on human LDL oxidation as 78.2% at $200{\mu}g/ml$ and the other extracts also did above 60%. Diethyl ether fraction and ethyl acetate fraction showed strong inhibition activity $(34.38%{\sim}78.13%)$ on LDL oxidation at concentration of $10{\sim}200\;{\mu}g/ml$. From the statistical analysis via SAS program, correlation coefficient between total phenolic content and ACE inhibitory effect was 0.6353 at P<0.05. Conclusively, this report showed that the most efficient extraction condition for elevating inhibitory activity on ACE and LDL oxidation, phenolic content and yield from Panax ginseng was 50% ethanol extraction at room temperature or high temperature condition. And Panax ginseng would be used for preventing hypertension or atheroscrelosis for man via inhibitory action on ACE and LDL oxidation.
Journal of the Korean Society of Food Science and Nutrition
/
v.35
no.6
/
pp.791-800
/
2006
This study examined the effects of gromwell (Lithospermum erythrorhizon) extracts on the storage characteristics of Kangjung. At an increase of $0{\sim}0.25%$, there was no significant difference in the moisture content of wild and cultivated gromwell extract added to Kangjung, whereas there was a significant difference when increased to 0.5%. When compared, the occurrence of lipid oxidation among the controlled gromwell extract group stored at $60^{\circ}C$, resulted in peroxide values exceeding 40 meq/kg which is a maximum value for Hankwa within 12 hours of storage. However, at an increase of 0.25%, the cultivated gromwell extract added group reached limits within 16 hours. Furthermore, at a 0.5% increase in cultivated gromwell and 0.25% in wild gromwell, extract added groups exceeded this limit within 20 hours of storage. Gromwell added Kangjung, a fried food, showed efficiency in suppressing oxidation of fat, more so in the wild gromwell than the cultivated gromwell. In addition, efficiency in suppressing oxidation of fat increased at the 0.5% level than the 0.25% level. In conclusion, it is believed that an unused pigment resource called Lithospermum erythrorhizon, normally reserved for medicinal use, can be distributed as a safe food additive. In addition, as Lithospermum erythrorhizon is a natural antioxidant in fried foods, we believe this satisfies the demand for natural food.
Proceedings of the Korea Society of Poultry Science Conference
/
2001.11a
/
pp.89-91
/
2001
Two experiments were conducted to compare the dietary supplemental influence of conjugated linoleic acid(CLA), soybean oil(SBO) and commercial tallow(U) on performance and physiological related factor of broiler chicks. Diets contained CP 21.5, 19% and ME 3,100, 3,100kcal/kg for starting and finishing period. Each three levels(1.0, 2.0, 3.0%) of CLA, SBO, CT were supplemented to basal diets. Five hundred forty and three hundred sixty chicks were applied to 3${\times}$3, 2${\times}$3 factorial design with four replicates in Expt 1 and 2. Weight gain, food intake and feed conversion were weekly examined. Blood cholesterol, ND antibody titer, blood components and were measured at the end of experiment. Metabolizable energy(ME) were measured through the metabolic feeding trial in each oil. ME was 8,542, 9,179, 8,133 kcal/kg in CLA, SBO and CT, respectively. In Expt 1, weight gain of chicks fed 1% dietary oil was significantly lower than other treatments(P<0.05). Feed conversion was significantly improved in SBO supplemental groups of all treatments(P<0.05). In Expt 2, CLA supplements increased weight gain significantly for finishing period(P<0.05) compared to that of other treatments. Feed conversion of chicks fed 2% dietary oil was significantly improved relative that of 3%(P<0.05). HDL of 3% dietary supplemental oil treatments was significantly higher for finishing and starting period in Expt 1 and 2, respectively than other treatments(P<0.05). There were no significantly different M Antibody titer in Expt 1, but showed significance between dietary supplemental oil in Expt 2(P<0.05). CLA content of breast meat was 12.23, 18.74, 25.67 mg/g in 1, 2, and 3% CLA treatments and significantly different between them(P<0.05). As the results of these experiments, feeding CLA tended to improve the weight gain compared In that of other dietary oil, but was not increase the ND antibody titer of broiler chciks. CLA content of breast meat also showed the significance at different level of dietary supplement.
The formation of reactive lipid aldehydes, 4-hydroxynonenal (HNE) is shown to be derived from fatty acid hydroperoxides through the oxidative process. Among its known effects in cytotoxicity, HNE has been implicated in apoptotic cell death. To delineate its putative role as a potential mediator, we investigated the mechanism by which HNE induces apoptosis of endothelial cells (ECs). The anti-proliferative effects of HNE were tested through MTT assay after exposure to various concentrations ($5\sim15\;{\mu}M$) of HNE. We observed apoptotic bodies with propidium iodide staining, and measured the HNE induction of endothelial apoptosis by flow cytometry assay. We observed that cells exposed to HNE for 24 hr resulted in increased poly(ADP-ribose) polymerase cleavage and up-regulation of Bax. Data on the HNE action strongly indicated the involvement of reactive species, namely, intracellular ROS, nitrite, and peroxynitrite. To obtain evidence on the implication of ROS and peroxynitrite in HNE-induced apoptosis, a ROS scavenger, N-acetylcysteine (NAC), and a peroxynitrite scavenger, penicillamine, were tested. Results clearly indicate that the induction of apoptosis by HNE was effectively inhibited by NAC and penicillamine. Based on the present data, we conclude that the endothelial apoptosis induced by HNE involves both ROS generation and peroxynitrite activity. Our new data could lead to a redefinition of HNE action on apoptosis in ECs.
Naked barley flour(Baekdong cultivar) was examined with respect to its pasting properties by means of Brabender amylograph after adding barley lipids, fatty acids, vegetable oils and emulsifiers at 1% level. Amylogram of barley flour showed a similar gelatinization temperature but higher paste viscosities at all reference points as compared with wheat flour. Barley flour showed lower amylograph curves by defatting with n-hexane, namely reductions in initial gelatinization point, maximum viscosity and setback value. But re-addition of n-hexane extract to the defatted flour essentially reproduced the curve obtained in the undefatted flour. Addition of polar and nonpolar lipids exhibited different effects on the pasting properties of barley flour. Polar lipids generally increased maximum viscosity a little while non-polar lipids increased the maximum viscosity substantially. Addition of increasing amounts of nonpolar lipids was found to progressively increase the maximum viscosity. Addition of fatty acids increaed th maximum viscosity and delayed the peak time. The maximum viscosity of defatted barley flour impregnated with unsaturated fatty acids was higher than that of defatted barley flour impregnated with saturated fatty acids Increasing amounts of linoleic acid were fount to progressively increase the maximum viscosity and to delay the peak time of defatted barley flour. Addition of six vegetable oils lowered the gelatinization temperature and rasied the maximum viscosity and temperature at maximum viscosity. Addition of increasing amount of peanut oil was found to decrease the maximum viscosity. The effect of emulsifiers was greater in undefatted flour than in defatted flour. The maximum viscosity of defatted flour was slightly affected by Methocel 50, Methocel 1500 and Emulthin, and substantially increased by Methocel 4000, sodium polyacrylate and calcium stearyl lactylate.
Ceramide, cholesterol and free fatty acids are the major intercellular lipids, maintaining the integrity of the skin barrier. However, the roles of these lipids in canine skin barrier function are little known. The aim of this study was to evaluate the repairing effects of 2% ceramide (CER), 2% cholesterol (CHO), 2% linoleic acid (LIN) and 2% intercellular lipid mixture (ILM) on damaged canine skin barrier by 1.25% sodium lauryl sulphate (SLS). Transepidermal water loss (TEWL), skin hydration, skin pH and skin thickness were assessed. Histological profiles and transmission electron microscopic (TEM) profiles were assessed on day 12. SLS effectively induced the canine skin barrier damage. TEWL was significantly decreased by topical application of CER and ILM in SLS and vehicle-treated skin on day 8 and 12, respectively (p < 0.05, p < 0.0 I). By end of the experiment all lipids significantly decreased the TEWL as compared with SLS and vehicle control, but CER and ILM more significantly decreased the TEWL than UN and CHO, respectively (p < 0.01). Skin hydration was significantly increased by CER and ILM during experimental periods (p < 0.01). Skin pH was significantly decreased by CER, LIN and ILM. In histological profiles, the thickness of the stratum corneum (SC) was significantly increased by the SC lipids as compared with vehicle and SLS (p < 0.01). Especially, CER and ILM showed more prominent improvement of barrier recovery. In TEM of the SC, SLS induced exfoliations of corneodesmosomes in the SC, and CER and ILM effectively protected exfoliations of corneodesmosomes on SLS-damaged canine skin. These results indicated that topical application of CER and ILM dramatically improved damaged-skin barrier function by SLS. Also, it was considered that the use of CER or ILM was recommended for the management of skin barrier dysfunction by irritant and inflammatory skin disorders such as atopic dermatitis.
Journal of the Korean Society of Food Science and Nutrition
/
v.32
no.8
/
pp.1344-1350
/
2003
This study was performed to investigate the antioxidative effect as the inhibition of malondialdehyde (MDA) and bovine serum albumin (BSA) conjugation reaction, inhibition of lipid peroxidation and the scavenging effect on 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical, and antimutagenic capacities as the Ames test in 7 common vegetables taken by Korean for suggestion of prevention and dietetic treatment of chronic diseases and development of antioxidative and antimutagenic functional food. The water fractions of perilla leaves and sedum were most effective in the inhibition of MDA and BSA conjugation reaction showing 62.5% of inhibition rate among 7 vegetables. The inhibition rates of ethanol fractions of sedum and wild water dropwort on the lipid peroxidation were 67.1% and 61.5%, respectively. The ethanol fractions of crown daisy and wild water dropwort showed the most effective results among 7 vegetables in the DPPH radical scavenging capacities showing inhibition rate of 78.8% and 73.6%, respectively. The indirect and direct antimutagenic effects of ethanol extract of 7 vegetables were examined by Ames test using Salmonella typimurium TA98 and TA100. Inhibitory effects of wild water dropwort was superior to the other vegetables on the Ames test. These results suggest that common 7 vegetables taken by Korean are believed to be a possible antioxidative and antimutagenic capacities, although the results were different, more or less, according to the assay method and vegetables used.
The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
/
v.20
no.1
s.32
/
pp.80-98
/
2007
Objectives : This study was carried out to evaluate anti-oxydative, anti-tumor effect for clinical application of Whakijogyungtang (WJT) Results : 1. DPPH radical scavenging activities of WJT water extracts(Exts) were in proportion as concentration of WJT.(3 ${\mu}g/ml:12.6{\pm}2.3$ %) 2. ABTS+ scavenging activities of WJT water Exts were more effective in high density.(3 ${\mu}g/ml:4.3{\pm}1.6$ %, 10 ${\mu}g/ml$: $11.8{\pm}2.5$ %, 30 ${\mu}g/ml:45.3{\pm}3.2%$ 100 ${\mu}g/ml$: $62.7{\pm}4.8%$) 3. Hydrogen peroxide$(H_2O_2)$ scavenging activities of WJT water Exts were effective.(3 ${\mu}g/ml:4.7{\pm}0.8$ %, 10 ${\mu}g/ml: $8.2{\pm}1.6$ %, 30 ${\mu}g/ml:19.5{\pm}3.2$ % 100 ${\mu}g/ml$: $24.6{\pm}3.8$ %) 4. Anti oxidative effects against linoleic acid were not effective. 5. The generation of $O_2\;^-$ in S-180 cells were according to the concentration of WJT water Exts, specially effective over 100 ${\mu}g/ml$ concentration. 6. The SOD activities in S-180 cells were in proportion as cytotoxicity against S-180 cells of WJT water Exts. 7. The GPx activities in S-180 cells were in proportion as cytotoxicity against S-180 cells of WJT water Exts(more effective on 300 ${\mu}g/ml$ and 1000 ${\mu}g/ml$ concentration), but the catalase activities in S-180 cells were not effective. 8. The results of activites against multi-drug-resistance(MDR) of WJT were as follows. 1) In water Exts from WJT, cytotoxicity against AML-2/D100 with vincristine($IC_{50:}39.78$${\mu}g/ml$) was more effective than without vincristine($IC_{50:}$ 183.58 ${\mu}g/ml$), Cross resistance(CR:3.85) was not effective, and anti-MDR activites(RF) was effective.(RF:3.85) 2) In hexane fraction, cytotoxicity against AML-2/D100 with vincristine ($IC_{50:}130.88$${\mu}g/ml$) was more effective than without vincristine ($IC_{50:}293.10$${\mu}g/ml$) and anti-MDR activites(RF) was effective.(RF:4.61) 3) In chloroform fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. 4) In ethyl acetate fraction, cytotoxicity against AML-2/D100 with vincristine($IC_{50:}36.43$${\mu}g/ml$) was more effective than without vincristine ($IC_{50:}73.07$${\mu}g/ml$), Cross resistance(CR:0.53) was not effective, and anti-MDR activites(RF) was effective.(RF:2) 5) In butanol fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. 6) In $H_2O$ fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. Conclusion : These result suggest that WJT has antioxidative effects, anti-tumor effects by apoptosis of free radical$(O_2\;^-)$ activity, and anti-MDR activites(especially hexane and ethyl acetate fraction).
This study was conducted to determine the nutritional quality of two newly-developed native chicken strains, compared to the commercial Korean native chicken. A total of 600 chickens (CON: Hanhyup No. 3, CL1: candidate line C, CL2: candidate line D) raised under the same conditions were slaughtered at either 5 or 12 weeks. Leg meat was then obtained and analyzed for its physicochemical properties. The results showed that regardless of the growing period, there was no variation in proximate composition (P>0.05), except for crude protein, between strains. Water holding capacity did not differ between strains at either slaughter age; however, it was significantly lower in the 12-week group than in the 5-week group (P≤0.05). For both skin and muscle color, a* and b* values were lower at 12 weeks than at 5 weeks (P≤0.05). DPPH radical-scavenging activity tended to be lower at 12 weeks than at 5 weeks (P≤0.05). Furthermore, all chickens slaughtered at 5 weeks were found to have greater contents of linoleic acid (18:2) and polyunsaturated fatty acids (PUFA) and lower atherogenicity and thrombogenicity indices than those slaughtered at 12 weeks (P≤0.05). However, anserine, betaine, and glucose were more concentrated among the lines at 12 weeks than at 5 weeks (P≤0.05). In conclusion, the quality traits of native chickens were distinct by different production stages rather than chicken lines.
So-Yun Kim;Min Ji Park;Jeong-Hun Song;Sangmin Ji;Gyu-Dong Chang;Sun Young Kim
Journal of Life Science
/
v.34
no.3
/
pp.191-198
/
2024
To verify the nutritional value and safety of larvae fed with a soymilk residue-added food source, we compared and analyzed the nutritional components of and harmful substances in Tenebrio molitor larvae reared on wheat bran. Crude protein content based on dry weight was 1.2 times higher in the 10% soymilk residue-fed group (SR) (54.0%) than in the wheat bran-fed group (WB) (43.5%). Dietary fiber also tended to be 1.9 times more in the SR (4.9%) than the WB (2.5%). Among unsaturated fatty acids, the linoleic acid content was found to be 1.1-fold higher in the SR (32.9%) than in the WB (29.0%). Potassium, which was the most abundant among the macro minerals, was 1.1-fold more abundant in the WB (1,074.5 mg/100 g) than in the SR (1,014.0 mg/100 g). Among the micro minerals, zinc content was 1.2-fold higher in the SR (14.5 mg/100 g) than in the WB (11.9 mg/100 g). The results of the analysis of hazardous substances in the WB and SR revealed that the amount of heavy metals met the standards for heavy metals in edible insects, and food poisoning-inducing bacteria such as Escherichia coli and Salmonella spp. were not detected in all groups. These results indicate that mealworm larvae fed with 10% soymilk residue have abundant nutrients and are safe for intake. Thus, food sources with added soymilk residue has the potential to be used as feed ingredients.
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