Choi, Soo Yeon;Kim, Ji Hyun;Lee, Jaemin;Lee, Sanghyun;Cho, Eun Ju
Journal of Applied Biological Chemistry
/
v.60
no.2
/
pp.141-147
/
2017
Radical scavenging effect and protective activity against oxidative stress of Acer okamotoanum were investigated. A. okamotoanum was extracted with methanol (MeOH) and then fractionated with n-BuOH, ethyl acetate (EtOAc), methylene chloride and n-hexane fractions. The MeOH extract and fractions showed strong 1,1-diphenyl-2-picrylhydrazyl and superoxide radical scavenging activity. Among the MeOH extract and fractions, the EtOAc fraction showed the strongest radical scavenging activity. In addition, total phenolic and flavonoid contents of EtOAc fraction was higher than other extract and fractions. Furthermore, we investigated the neuroprotective effect of the MeOH extract and fractions from A. okamotoanum against oxidative stress under cellular system using C6 glial cell. The C6 glial cells showed a decrease in cell viability and high production of reactive oxygen species (ROS) by the treatment of amyloid $beta_{25-35}$ ($A{\beta}_{25-35}$). However, with the treatment of the MeOH extract and fractions, it significantly increased the cell viability and inhibited the overproduction of ROS by $A{\beta}_{25-35}$. In particular, the EtOAc fraction led to significantly increase the cell viability and decrease the generation of ROS against oxidative stress by $A{\beta}_{25-35}$. The current study indicated that A. okamotoanum demonstrated antioxidative and neuroprotective effects. In particular, the EtOAc fraction which attributed a strong protective activity against oxidative stress.
Kim, Dong Won;Kim, Chang Suk;Choi, Ki Young;Jeon, Young Shin;Jeong, Young Kyu;Yoon, Yeo Hag;Hon, Choon Pyo
Analytical Science and Technology
/
v.6
no.5
/
pp.463-469
/
1993
HDBPDA ion exchange resin, {(4, 5) : (13, 14)-Dibenzo-6, 9, 12-trioxa-3, 15, 21, -triazabicyclo [15. 3. 1]heneicosa-(1, 17, 19)(18, 20, 21) triene ion exchange resin : HDBPDA ion exchange resin} had a capacity of 3.8meq/g dry resin. The distribution coefficients of alkali and alkaline earth metal ions on HDBPDA and strongly acidic cation exchange resin, Dowex 50W-X8(200-400mesh) in water, and the various concentrations of hydrochloric acid were determined. Concentration of hydrochloric acid have almost not influenced on the distribution coefficients of alkali and alkaline earth metal ions for the HDBPDA ion exchange resin, but generally the distribution coefficient slightly increased with decreasing concentration of hydrochloric acid. The distribution coefficients of metal ions in water are larger than those in various hydrochloric acid concentration. The distribution coefficients of alkali and alkaline earth metal ions for the Dowex 50W-X8 ion exchange resin increased with decreasing hydrochloric acid concentration. Especially, the distribution coefficients of alkaline earth metal ions increased rapidly compared to those for alkali metal ions. The distribution coefficients of alkali and alkaline earth metal ions on HDBPDA ion exchange resin increased in a linear manner with decreasing acid concentration, and the slope, d log Kd/d log $M_{HCl}$ is about -0.2. Of the distribution cofficients of alkali metal ions on Dowex 50W-X8, at range of moderate hydrochloric acid concentration, the slope is about -1, while the slope for alkaline earth metal ions is about -2. However, at very low hydrochloric acid concentration, the linear variation between distribution coefficient and acid concentration was not occurred, but the slope was deviated from above values at low acid concentration.
CLA was chemically synthesized by alkaline isomerization method using corn oil. CLA-TG was synthesized by chemical reaction using sodium methoxide. For the control, 10% of back fat among the total component was only added without the annex of CLA-TG. For the first treatment, 5% of CLA-TG among the lard component added into the press ham was replaced. For the 2nd, 3rd and 4rd treatments, 10%, 15% and 20% of CLA-TG was respectively replaced. Manufacture press ham using CLA-TG were vacuum packaged and then stored during 1, 7, 14, 21 and 28 days at 4℃. Samples were analyzed for shear force value, sensory evaluation, TBARS, fatty acid composition and CLA content. Shear force value of control was significantly higher than that of CLA-TG treatment groups(P<0.05). All treatments were increased by the passage of storage time. No remarkable differences were found in sensory properties among control and CLA-TG treatment groups. CLA-TG treatment groups showed significantly(P<0.05) lower TBARS value than the control. TBARS value was increased significantly during storage in all treatment. In the change of fatty acid composition, the contents of C14:0~C20:4 were decreased significantly by CLA-TG additive. Whereas the increase level of CLA-TG additive resulted in the significantly higher unsaturated fatty acid and CLA content. Summing up the a forementioned results, press ham manufacturing with CLA-TG additive was not affected in sensory evaluation. Also, it may be assumed that the high quality press ham can be manufactured with the extent of storage period and CLA accumulation.
Park, Kyung-Pyo;Kim, Jong-Sung;Suh, Dae-Chul;Park, Hyoung-Sup
The Korean Journal of Pharmacology
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v.30
no.1
/
pp.29-37
/
1994
Inhibition of the nociceptive Tail Flick Reflex (TFR) was observed with electrical stimulation of the locus coeruleus/subcoeruleus (LC/SC) in the male Sprague - Dawley rats under light anesthesia, and the involved neurotransmitter (s) were characterized. Electrical stimulation of LC/SC induced the analgesia with the stimulation threshold (intensity of the current, given for 100 usec and in 100 Hz frequency, which caused the TF latency longer than 6.5 sec) around 55 uA. Intrathecal administrations of ${\alpha}_2$ antagonist, yohimbine (30 ug) or opioid antagonist, naloxone (20 ug) increased the stimulation threshold by 147% and 123% respectively (from 55 uA to 135 uA,9 and from 54 uA to 123 uA;P0.01, n=5, each). The basal TF latency without stimulation (3.1 sec) was reduced by the antagonists (to 2.5 sec by yohimbine, p<0.05, n=5; to 2.6 sec by naloxone, p<0.1, n=5), vehicle only did not show any effect. Noradrenaline(NA) in the spinal cord superfusates measured with HPLC was increased by the LC/SC stimulation, from 4.18 ng/ml before to 7.74 ng/ml after stimulation (P<0.05, n=10). The result suggest that analgesia induced by LC/SC stimulation is mediated, at least in part, by the noradrenergic system in which ${\alpha}_2$ receptor is involved, as well as the opioid system.
The Journal of Korean Society for Radiation Therapy
/
v.24
no.2
/
pp.183-188
/
2012
Purpose: The concern of improving the quality of life and reducing side effects related to cancer treatment has been a subject of interest in recent years with advances in cancer treatment techniques and increasing survival time. This study is an analysis of differing scattered dose to the contralateral breast using common different treatment techniques. Materials and Methods: Eclipse 10.0 (Varian, USA) based $30^{\circ}$ EDW (Enhanced dynamic wedge) plan, $15^{\circ}$ wedge plan, $30^{\circ}$ wedge plan, Open beam plan, FiF (field in field) plan were established using CT image of breast phantom which in our hospital. Each treatment plan were designed to exposure 400 cGy using CL-6EX (VARIAN, USA) and we measured scattered dose at 1 cm, 3 cm, 5 cm, 9 cm away from medial side of the phantom at 1 cm depth using ionization chamber (FC 65G, IBA). We carried out measurement by separating effect of medial tangential field and lateral tangential field and analyze. Results: The evaluation of scattered dose to contralateral breast, $30^{\circ}$ EDW plan, $15^{\circ}$ wedge plan, $30^{\circ}$ wedge plan, Open beam plan, FIF plan showed 6.55%, 4.72%, 2.79%, 2.33%, 1.87% about prescription dose of each treatment plan. The result of scattered dose measurement by separating effect of medial tangential field and lateral tangential field results were 4.94%, 3.33%, 1.55%, 1.17%, 0.77% about prescription dose at medial tangential field and 1.61%, 1.40%, 1.24%, 1.16%, 1.10% at lateral tangential field along with measured distance. Conclusion: In our experiment, FiF treatment technique generates minimum of scattered dose to contralateral breast which come from mainly phantom scatter factor. Whereas $30^{\circ}$ wedge plan generates maximum of scattered doses to contralateral breast and 3.3% of them was scattered from gantry head. The description of treatment planning system showed a loss of precision for a relatively low scatter dose region. Scattered dose out of Treatment radiation field is relatively lower than prescription dose but, in decision of radiation therapy, it cannot be ignored that doses to contralateral breast are related with probability of secondary cancer.
To compare the quality characteristics of commercial wasabi paste products, the physicochemical and microbial characteristics of 6 samples were analyzed. In addition, the contents of allyl isothiocyanate, which show unique flavor and antimicrobial activity in wasabi paste products, were compared. pH of commercial 6 wasabi products were ranged from $4.12{\pm}0.01$ to $4.90{\pm}0.01$, and titratable acidities of products distributed at cold temperature (CW) were higher $0.60{\pm}0.00{\sim}0.77{\pm}0.02%$ than those of products distributed at room temperature (RW). Salinities of RW were higher ($4.27{\pm}0.06{\sim}7.53{\pm}0.12%$) than those of CW ($2.20{\pm}0.00{\sim}3.60{\pm}0.10%$). Soluble solid and sorbitol contents of RW were higher ($33.00{\pm}1.00{\sim}44.67{\pm}2.08^{\circ}Brix$, $378.90{\pm}63.79{\sim}724.37{\pm}7.85mg%$) than those of CW ($22.00{\pm}1.73{\sim}27.00{\pm}1.00^{\circ}Brix$, $27.67{\pm}9.92{\sim}175.31{\pm}10.56mg%$), respectively. The viable cell counts of samples were $ND{\sim}3.65{\pm}0.23 log\;CFU/g$ without distribution method and packaging type, and yeasts and molds were not detected in 6 wasabi products. Allyl isothiocyanate contents of RW were higher ($53.35{\pm}0.08{\sim}159.76{\pm}0.81mg%$) than those of CW ($24.07{\pm}7.69{\sim}48.19{\pm}0.15mg%$).
Journal of the Korea Organic Resources Recycling Association
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v.1
no.1
/
pp.103-113
/
1993
Every year, over $3.37{\times}10^7$ ton of municipal solid waste is generated in Korea, of which about 28% is organic food waste from restaurant, dining halls and households etc. Methane conversion of the food waste by anaerobic digestion could be a viable approach for energy recovery as well as safe disposal of the waste. However, as food waste is composed of highmolecular complex polymers such as cellulose, lignin and protein, anaerobic digestion of food waste has not been efficient in terms of volumetric loading rate, solid retention time and extent of anaerobic degradation. In this research, the improved anaerobic degradation of food waste was attemped by applying rumen microorganisms to anaerobic digestion. Acidification efficiency of food waste by rumen microorganisms was compared with that of conventional acidogenesis. And optimum acidification conditions by rumen microorganisms were also determined. For the experiments, anaerobic batch reactors of 600 mL was fed with the processed (dried and milled) food waste obtained from a restaurant. Ultimate volatile fatty acid (VFA) yield produced by rumen microorganisms was about 8.4 meq VFA/g volatile solid (VS) that is 95% of the theoretical value. This yield was not much different from that of conventional acidogenesis, but hydrolysis rate was about twice faster. Cumulative VFA concentration increased from 66 meq/L to 480 meq/L, when the initial TS was increased from 1% to 15%. But VFA yield at 15% TS was half of that at 1% TS. This inhibition on the acidification might be caused by the rapid drop of pH and higher concentration of nonionized VFA. Optimal pH and temperature range for the acidification were about 6.0~7.5 and $35{\sim}45^{\circ}C$, respectively.
Journal of the Korean Society for Marine Environment & Energy
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v.13
no.4
/
pp.288-295
/
2010
Metal exposure experiments using polychaete (Perinereis nuntia) as a bio-indicator of trace metals contamination were conducted to evaluate the bioaccumulation and the biomarkers responses such as metallothionein-like protein (MTLPs) and glutathione S-transferase (GST) which was simultaneously exposed to Cadmium (Cd) and Copper (Cu). Cu and Cd concentrations in polychaete were enhanced with increasing exposure time and their concentrations of aqueous medium. Initial accumulation of Cd was higher than that of Cu. Our results showed that the bioaccumulation of Cu and Cd were prohibited, especially at higher Cu levels, suggesting the different cellular uptake mechanisms when Cu and Cd are co-exist. Net accumulation rate of Cu was declined with exposure time but it did not show any significant change for Cd. Although the highest MTLPs concentration was observed at 6 hr of exposure time, it did not show any significant change related to exposure times and metals concentrations. An increase of GST activity tended to increase as a function of exposure time and metals concentrations. And GST activities in P. nuntia have similar tendency with bioconcentration factors in high concentration of Cu (treatment group IV) at post 24 h of exposure. Our results provide new information of the bioaccumulation and biomarker responses to understand the effects of co-existing contaminants (Cu and Cd) using polychaete. Further studies are required to elucidate the bioaccumulation and biomarkers responses for various contaminants.
Fatty acid compositions and physicochemical properties of feta cheese made from bovine milk were studied. Nutritional compositions of feta cheese were fat 22.79%, protein 10.57% with moisture content of 59.87%. The log cfu/g of lactic acid bacteria in bovine feta cheese decreased from 10.25 to 7.95 and pH also changed from pH 6.22 to pH 5.55 during storage at 4℃ for 14 d aging. The color of feta cheese turned into more whitish (L-value, 100.1) with a red (a-value, 4.6) and gray (b-value,-4.1) color after 14day's aging. For the texture profile analysis of bovine feta cheese, resilience was increased significantly (p<0.01) throughout the aging periods and adhesiveness was rapidly increased right after progressing of aging at both temperatures, but no difference was found between the aging periods. Hardness, fracturability, gumminess and chewiness were gradually increased at 0℃, but no statistical significances were found. Springiness and cohesiveness were not changed at both temperatures. In organoleptic evaluations, organoleptic intensities in sweetness, milky taste and saltiness were significantly enhanced over those of the control cheese at the level of p<0.01, and masticatory texture at p<0.05 with the progress of aging to 14d. Organoleptic preferences were significantly (p<0.01) enhanced except smell, color, mouth feel, and masticatory texture with the aging. In the fatty acid compositions of feta cheese analyzed by gas chromatography, the content of SFA (52.61%) was slight higher than that of USFA (47.39%) composed with MUFA (28.98%) and PUFA (18.41%). Among the nutritionally important fatty acids; ω6 (9.27%) and ω3 (0.55%) fatty acids, CLA (0.12%), arachidonic acid (0.19%) and DHA (0.12%) were also found in bovine feta cheese.
Lipie peroxide formation, antiperoxidative s system and body adaptability for handling lipid p peroxide were examined in the first and second g generations of rats fed fish oil. Mackerel oil(MO) was used and four other dietary oils and fat, i.e. soybean oil(SO), perilla oil(PO), rapeseed oil(RO) and beef tallow(BT) were also employed to compare the effect of fish oil. Synthetic diets containing these five dietary fats at the level of 1O%(w/w), were given to the correspondm ing groups of male and female rats weighing about 70 grams. After 34 days of feeding, male a and female rats were mated and their offsprings were raised throughout suckling (17, 26 days) and weanling (39 days) periods. Liver lipid perox xide level was highest in MO group of both first (mother rats after lactation) and second generat tions of 17 and 26 days old, but not of 39 days old. During suckling period, liver lipid peroxide level was well matched to total unsaturation of dietary fat. Brain lipid peroxide levels were not different among five groups. Liver $alpha$-tocopherol a and reduced glutathione (GSH) levels were lowest in MO fed first generation. In second generation, $alpha$-tocopherol level was also low in MO group, although the effect was less pronounc ced, but GSH level was not different from other groups. Oxidized glutathione (GSSG) level did not consistently vary by change in dietary fat. Glutathione peroxidase activity increased as young rats grew up to 39 days. Superoxide d dismutase activity change was insignificant by a age, but was shown as lowest in MO group. At the age of 26 and 39 days, liver glutatione peroxidase activity was increased as was level of lipid peroxide, suggesting that this is the one of the mechanisms responsible for body adaptab bility for protection against the accumulation of lipid peroxide.
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