Kim, Jae-Hyung;Kim, Joeng-Il;Lim, Yong-Kyu;Lee, Dong-Yul
The korean journal of orthodontics
/
v.35
no.3
s.110
/
pp.182-195
/
2005
The purpose of this retrospective study was to estimate the pretreatment characteristics of growing patients with Class II malocclusion. who had been treated with maxillary second molar extractions The sample comprised of 51 subjects; 18 subjects were classified into the molar extraction group, and 33 subjects were treated without extraction and classified into the nonextraction group. Pretreatment lateral cephalograms were calculated and analyzed by independent t-test and stepwise discriminant analysis. In measurements for skeletal pattern, no anteroposterior measurements and proportions of various vertical dimensions were significantly different. and only some measurements such as $AB-MP(^{\circ)$, Na-We(mm), AVD (mm) were significantly different between the two treatment groups (p<0.05). In measurements for dentoalveolar pattern. some measurements, which were related to the position and angulation of the upper and lower permanent first molars, and the angulation of the upper third molars, were significantly different between the two treatment groups In particular, the maxillary second molar extraction group exhibited more mesial angulation of maxillary first molar to the occlusal plane.
A U.S EPA Synthetic soil matrix was used for reference neat soil and pyrene contaminated soil. For the contaminated soil, 4.79 wt.% pyrene was dissolved completely into the djchlorornethane, and the soil was evenly soaked with the pyrene solution. The contaminated soil samples(50$\pm$0.5mg) were heated in a modified electrical screen heater reactor which consisted of a thin stainless foil (3.5cm$\times$13cm$\times$0.00254cm, 302 stainless steel shim), two electrodes, and a 20cm dia. $\times$30cm tall cylindrical Pyrex chamber sealed at both ends by aluminum flanges. The heating rate and time conditions were selected as $455^{\circ}C$ @ $1137^{\circ}C$ /s, $760^{\circ}C$ @ $950^{\circ}C$ /s and $977^{\circ}C$ @ $977^{\circ}C$/s. Tar samples after heating the soils were collected on the aluminum foil funnel and a glass filter paper (25mm dia. filter paper) The tar sample and remnant soil on the reactor were extracted with dichloromethane covering the filters, foils and soil by sonicating each in the waterbath for 10 minutes. The extractions were run on a HPLC. At the low peak temperature(about $455^{\circ}C$ @ $1137^{\circ}C$/s) the color of tar was "white", at the middle peak temperature (about 76$0^{\circ}C$ @ 95$0^{\circ}C$/s) the color of tar was "pink brown", at the high peak temperature (about 977$^{\circ}C$ @ 977$^{\circ}C$/s) the color of tar was "dark brown". Cyclopeta(cd)pyrene (CPEP) , which is an interesting species due to mutagenic effect on human cells, was detected in tar samples only above the middle peak temperature. This species was not detected at the low peak temperature. Six isomers of bipyrene were detected. Phenanthrene(C$_{14}$$H_{10}$) and cyclopenta(def)phenanthrene(C$_{15}$$H_{10}$) were also detected, but their content was very small relative to the other listed compounds.to the other listed compounds.
Extractions of Artemisia princeps Pampanini were obtained by using water and ethanol at different temperatures ($60^{\circ}C,\;100^{\circ}C$) with or without ultrasonification process (40 kHz). Yield of ultrasonificated extracts were about 20% higher than that of control group. Cytotoxicity of all conditions through adding 1.0 mg/$m{\ell}$ was below 37%, and treated with ultrasonification group was lower than the other group, about $5{\sim}8%$. $100^{\circ}C$ water extract with ultrasonification was higher anticancer activities as maximum 73% and higher selectivities at concentrations over 0.8 mg/$m{\ell}$. The extracts treated with ultrasonification were higher anticancer activities than the control. Densitometric analysis of bcl-2 revealed that extracts of high anticancer activity had low density. This results suggest that expression of bcl-2 protein by adding of Artemisia princeps Pampanini extracts relative to taking cancer. To conclude, optimum condition for efficient extraction of Artemisia princeps Pampanini is using water with ultrasonification at over $60^{\circ}C$ below $100^{\circ}C$.
The geochemical evolution of mine drainage and leachate from waste rock dumps and stream water in Pb-As-rich abandoned Sechang mine area was investigated to elucidate mechanisms of trace metals. Total and sequential extractions were applied to estimate the distribution of trace metals in constituent phases of the waste rocks and to assess the mobility of trace metals according to physicochemical conditions. These discharged waters varied largely in chemical composition both spatially and temporally, and included cases with significant]y low pH (in the range 2.1-3.3), and extremely sulphate (up to 661 mg/l and metal contents (e.g. up to 169 mg/l for Zn, 27 mg/l for As, 3.97 mg/l for Pb, 2.99 mg/l for Cu, and 1.88 mg/l for Cd). Arsenic and heavy metal concentrations at the down-stream of Sechang mine have been decreased nearly to the background level in downstream sites (sites 8 and 16) without any artificial treatments. The oxidation of Fe-sulfides and the subsequent hydrolysis, of Fe(II), with precipitation of poorly crystallized minerals, constituted an efficient mechanism of natural attenuation which reduces considerably the transference of trace metals (i.e. Fe and As) to rivers. The dilution of drainage by mixing with pristine waters provoked an additional decrease of trace metal concentrations and a progressive pH increase. On the other hand, the most soluble cations (i.e. Zn) remained significantly as dissolved solutes until the pH was raised to approximately neutral values. With respect to ecotoxicity, it is likely that the Zn pollution is of particular concern in Sechang mine area. This was confirmed by the sequential extraction experiment, where Zn in wet waste-rock samples occurred predominantly in the exchangeable fraction (65-89% of total), while Pb was the highest in the reducible and carbonate fractions, and Cd, Cu and As in the residual fraction. Pb concentration in the readily available exchangeable fraction (34-48% of total) was dominated for dried waste rock samples. Considering the proportion of metals bound to the exchangeable and carbonate fractions, the comparative mobility of metals probably decreased in the order of Zn>Pb>Cd>As=Cu.
This study was conducted to increase sweetpotato utilization and to determine the vegetative value of sweetpotato tips by investigating the phenolic compounds, antioxidative effect in oil, electron donating ability, nitrite scavenging effect and ACE inhibition activities. The phenolic compounds present in sweetpotato tips are the gallic, chlorogenic, gentisic, caffeic, couramic and ferulic acid, which are 16-122 times higher compared to other vegetables such as spinach, soybean sprout, and perilla leaves. In each solvent extract, the total phenolic compounds (175.8mg/g) was composed of 55% EtOAc extraction and 39% BuOH extract, respectively. The results of induction period using the Rancimat method showed that the antioxidant activity of SP tips was higher than the tocopherol or BHT. The relative levels of each solvent extract in SP tips were as follows: EtOAc>BHT>BuOH>Tocopherol>Water>$CHCl_3$>Hexane. The peroxide value was measured every 5 days for 25 days during storage and results showed that the peroxide value, the tips, tuberous root and tocopherol were lower compared to spinach, soybean sprout and perilla leaves. Nitrite scavenging effects were excellent in sweetpotato tips, perilla leaves and soybean sprout, especially, inhibition rate of perilla leaves (72%) were superior to the others. In process of solvent extraction, activity of BuOH and water extractions were the best. ACE inhibition activity in sweetpotato tips was 1.5 times higher than in tuberous roots and $1.9{\sim}3.7$ times higher than in spinach, soybean sprout, perilla leaves.
Batch scale experiments to investigate the efficiency of the solidification process for metal mine tailing treatment were performed. Portland and MSG (micro silica pouting) cements were used as solidifier and three kinds of mine tailings (located at Gishi, Daeryang, and Aujeon mine) were mixed with cements to paste solidified matrices. Single axis com-pressible strengths of solidified matrices were measured and their heavy metal extraction ratios were calculated to investigate the solidification efficiency of solidified matrices created in experiments. Solidified matrices ($5cm{\times}5cm{\times}5cm$) were molded from the paste of tailing and cements at various conditions such as different tailing/cement ratio, cement/water ratio, and different cement or tailing types. Compressible strengths of solidified matrices after 7, 14, and 28 day cementation were measured and their strengths ranged from 1 to $2kgf/mm^2$, which were higher than Korean limit of compressible strength for the inside wall of the isolated landfill facility ($0.21kgf/mm^2$). Heavy metal extractions from intact tailings and powdered matrices by using the weak acidic solution were performed. As concentration of extraction solution for the powdered solidified matrix (Portland cement + Gishi tailing at 1:1 w.t. ratio) decreased down to 9.7 mg/L, which was one fifth of As extraction concentration for intact Gishi tailings. Pb extraction concentration of the solidified matrix also decreased to lower than one fourth of intact tailing extraction concentration. Heavy metal extraction batch experiments by using various pH conditions of solution were also performed to investigate the solidification efficiency reducing heavy metal extraction rate from the solidified matrix. With pH 1 and 13 of solution, Zn and Pb concentration of solution were over the groundwater tolerance limit, but at pH $1{\sim}13$ of solution, heavy metal concentrations dramatically decreased and were lower than the groundwater tolerance limit. While the solidified matrix was immerged Into very acidic or basic solution (pH 1 and 13), pH of solution changed to $9{\sim}10$ because of the buffering effect of the matrix. It was suggested that the continuous extraction of heavy metals from the solidified matrix is limited even in the extremely high or low pH of contact water. Results of experiments suggested that the solidification process by using Portland and MSG cements has a great possibility to treat heavy metal contaminated mine tailing.
This study was undertaken to investigate the antioxidative substance and activity of ethyl acetate extracted from Rumex crispus. Sample extracted follow in proper course of a solvent. Material refinement was carried out using silicagel column and Sephadex LH-20 column chromatography. Material sorting was carried by Gas Chromatography(GC/MS). 1,1-Diphenyl-2-Picrylhydrazyl(DPPH) free radical scavenging and enzyme activity were measured for antioxidative activity. as result of testing by DPPH free radical scavenging activity, Antioxidative activity was shown as the highest in the root, then leaf and stem in order. Ethyl acetate extraction of root part were 50% inhibitory concentration (IC50) Rumex activty(6.1 ug/mL). Rumex nipponicus(9.8 ug/ml) and Rumex acetoceae(31.5 ug/mL) in leaf part. The highest antioxidative activity of sample refined through silicagel column chromatography of Rumex crispus was appealed Fraction 5(IC50;3.57 ug/mL) in root and Fraction 6(IC50;85.9 ug/mL) in leaf. Fraction 5 in roof & Fraction 6 in leaf were refined using Sephadex LH-20 column chromatography. The highest antioxidative activity were appeared Fraction 4 (IC50;3.57 ug/mL) and Fraction 4 (IC50;18.41 ug/mL)in leaf. As for main phenol compounds 2,6-Dichloro-4-nitropnenol and 2-Isopropyl-5-methyl Phenol were identified in root and leaf, While 4-Vinyl-2- methoxy-phenol and 2,3-Dihydro- benzofuran were identifica ted only in leaf. Enzyme activity was shown low both in peroxidase(PDD) Non-activate(IU/mg protein)and in Superoxide dismutase(SOD) non-activate(IU/mg protein). 2,6-Dichloro-4-nitrophenol, 2-Isopropyl-5-methyl phenol, 4-Vinyl-2-methoxy-phenol were obtained in this experiment and these compounds are phenolic compounds which have OH group in the structure. With the result of this study these phenolic compounds which are extracted from Rumex crispus have high antioxidative effect. This antioxidative effect of Rumex crispus can be applied for chromo-preventive and antioxidative supplements which can be used for anti-allegy, aging, anti-tumor, aging and other oxidative disease for health promotion.
This study aimed to develop a new type of functional citrus beverage (Citurs-F) containing flavonoids extracted from the young fruits of satsuma mandarin ($Citrus$$unshiu$) and matured fruits of Jeju native dangyooja ($C.$$grandis$). We made beverages that contained 30% of satsuma mandarin extract with different percentages of concentrated dangyooja-derived flavonoid extracts. In sensory evalution, the highest response indices of color, taste and aroma were from the beverages based on the 30% young fruit extracts plus 15% (Citrus-F-15) and 20% (Citrus-F-20) flavonoids extract from the dangyooja using the KILO prep. In the changes of body weight after oral administration of the Citrus-F, the rat group with HF diet plus the Citrus-F decreased the body weight compared to the rat group fed only HF diet. This effect was to be continued for 9 weeks until the end of experiment. In the lipid content in blood, the rat group with oral administration of citrus extractions merely tended to resolve it in serum test. However, all the 0.1% Citrus-F-15 and Citrus-F-20 treated rat groups from the beginning or after 5 weeks appeared the lowest lipid contents in the blood. In the cholesterol contents, the rat group feeding the KILO-prep's extraction from the beginning weren't significantly recognized them in the group but the rat group feeding 0.1% Citrus-F-15 acted to reduce in the cholesterol contents from 5 weeks. The results indicated that the Citrus-F-15 with rich flavonoids might be main source alleviating the vascular diseases and obesity in human diet.
Journal of the Korean Society of Food Science and Nutrition
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v.34
no.9
/
pp.1336-1343
/
2005
In the present study, we screened candidates for enhancing insulin action and secretion from Cinnamomum camphora (CC) fractions, in 3T3-L1 adipocytes and Min6 cells by investigating insulin- stimulated glucose uptake and glucose-stimulated insulin secretion, respectively. CC were extracted by $70\%$ ethanol followed by XAD-4 column chromatography with serial mixture solvents of methanol and water, and the fractional extractions were utilized for determining insulin action and secretion, and $\alpha$-glucoamylase suppressing activity, A significant insulin-stimulated glucose uptake was observed in 3T3-L1 adipocytes, giving 0.5 or $5{\mu}g/mL$ of $40\%\;and\;60\%$ methanol fractions plus 0.2 nM insulin, compared to the treatment of DMSO plus 0.2 nM insulin. The treatments of $40\%\;and\;60\%$ methanol fractions plus 0.2 nM insulin reached the glucose uptake of 10 nM insulin treatment. The $40\%$ methanol fraction increased triglyceride accumulation by stimulating differentiation and triglyceride synthesis similar to pioglitazone, PPAR-$\gamma$ agonist. No inhibition of $\alpha$-glucoamylase activity of CC fractions was observed. They did not modulate the insulin secretion capacity In either low or high glucose media. These results suggest that $40\%$ methanol fraction contains a potential insulin sensitizer to have a similar function of PPAR-$\gamma$ agonist. Crude CC extract may improve glucose utilization by enhancing insulin-stimulated glucose uptake without elevating glucose stimulated insulin secretion.
Journal of the Korean Society of Food Science and Nutrition
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v.35
no.3
/
pp.307-314
/
2006
This study was conducted to screen in vitro angiotensin converting enzyme (ACE) inhibitory activities of methanol (MeOH) and aqueous extracts which were prepared by four different extractions-80% methanol extracts(ME) at $20^{\circ}C\;and\;70^{\circ}C$, respectively and aqueous extracts (AE) at both temperatures with the residue of the MEs-of ten marine green algae and nineteen brown algae collected along Jeju coast of Korea. Most marine brown algae extracts showed higher capacities than those of marine green algae in ACE inhibitory activity. Particularly, $70^{\circ}C$ MeOH extract (70ME) of Hizikia fusiforme showed the strongest inhibition activity (about 87%) among all the extracts. Also, 70 MEs of Enteromorpha linza, Ishige sinicola, Laminaria ochotensis, Petrospongium rugosum, Sagrassum horneri, Undaria pinnatifida and $20^{\circ}C$ MeOH extracts (20ME) of Myagropsis myagroides, Petrospongium rugosum, $20^{\circ}C$ aqueous extracts (20AE) of Codium contractum, Enteromorpha compressa, and $70^{\circ}C$ aqueous extracts (70AE) of Ecklonia cava, Petrospongium rugosum showed moderate ACE inhibitory activities more than 50% and the other extracts exhibited weak activities. On tile other hand, E. cava had the best ACE inhibitory activity among 70AEs. This indicates that 70AE of E. cava contains potential anti-ACE macromolecular. We tried to proteolytic digest 70AE of E. cava to induce production of anti-ACE peptides from E. cava 70AE. The enzymes used are five pretenses including Kojizyme, Flavourzyme, Neutrase, Alcalase, and Protamex, which are food grade-commercial enzymes from Novo Co. Flavourzyme-digest of E. cava 70AE showed the highest inhibitory activity about 90%. And the five different enzymatic digests of the E. cava 70AE ranged from 2.33 to 3.56 ${\mu}g/mL$, respectively in $IC_{50}$ values of anti-ACE activity.
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