Kim, Choon-Song;Ko, Jee-Yeon;Lee, Jae-Saeng;Jung, Ki-Yeol;Park, Sung-Tae;Ku, Yeon-Chung;Kang, Hang-Won
Korean Journal of Environmental Agriculture
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v.26
no.2
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pp.107-115
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2007
Objective of this study was to assess the efficient rice cultivation practice to mitigate the non-point source pollutants loading to the adjacent watershed. Cultivation practices consisted of machine transplanting, direct seeding on dry paddy, and no tillage in which no fertilizer and pesticide were applied to paddy field. Water in drainage canal was used as irrigation source during the entire rice growing season. Loading of the non-point source pollutants to the adjacent small stream was mitigated by all treatments. Rice yield, total biomass (rice + weeds), and uptake T-N, $P_2O_5$, and $K_2O$ were higher in machine transplanting practice than those in direct seeding and no tillage practices. However, the purification effects of non-point source pollutants were followed in orders of no tillage > direct seeding > machine transplanting due to quantity of irrigation water. The annual purification quantity of T-N, T-P, and K by rice cultivations ranged from 46 to 369 kg $ha^{-1}$, 4.1 to 16.4 kg $ha^{-1}$, and 55 to 238 kg $ha^{-1}$, respectively, during the entire rice growing season. Results revealed that no tillage practice of rice cultivation was the best management option in reducing the loading of the non-point source pollutants from the drainage canal into stream.
An analysis on cause-specific mortality at the provincial level provides essential information for policy formulation and makes it possible to draw hypotheses regarding various diseases and causes of death. Although the mortality level and causes of death at the provincial level are determined by the multiple effects of socioeconomic, cultural, medical and ecological factors, this study primarily intends to examine similarities and differences of cause-specific mortality at the provincial level. Utilizing the registered death and the registered population as of 1998, the delayed death registration and unreported infant deaths were supplemented at the provincial level and age-standardized death rates and life tables were calculated. Regarding the mortality level due to all causes, major findings were as follow: (1) For both sexes as a whole, Seoul showed the lowest mortality level, and Jeonnam showed the highest mortality level; and (2) The differences of the mortality level among provinces were greater for males than females and for those less than 65 years than those 65 years and over. Regarding the cause-specific mortality level revealed in all indicators (cause-specific age-standardized mortality rates and the probability of dying at birth due to a specific cause for males, females, and both sexes combined respectively), the major findings were as follow: (1) The mortality level due to heart diseases was the highest in Busan and the lowest in Gangweon; (2) The mortality level due to liver diseases was the highest in Chonnam; and (3) The mortality level due to traffic accidents was the highest in Chungnam and the lowest in Inchon. As the mortality differentials at the provincial level are related to various factors, exploratory statistical analysis is attempted for the 25 explanatory variables including socioeconomic variables and 90 mortality variables. Mortality due to all causes are related to socioeconomic variables. Among cause-specific mortality, mortality due to liver diseases and traffic accidents is related to socioeconomic variables. Finally, the need to improve the quality of death certificate is discussed.
Kim, Jae Deok;Sin, Hoon Tak;Kim, Young Sook;Ko, Young Kwan;Cho, Nam Kyu;Hwang, Ki Hwan;Koo, Suk Jin;Choi, Jung Sup;Park, Kee Woong
Weed & Turfgrass Science
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v.4
no.4
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pp.288-294
/
2015
This study was conducted to investigate efficient adjuvants to increase herbicidal efficacy of metabolites from Streptpmyces scopuliridis KR-001. Commonly used 21 adjuvants mixed with the metabolites were applied to eight weed species (six grass weeds and two broadleaved weeds). Based on the visual evaluation, two adjuvants, LE7 (Polyoxyethylene lauryl ether) and EP4C (Sodium bis (2-ethylhexyl) sulfosuccinate), were selected as most efficient adjuvants to elevate herbicidal efficacy of the metabolites. Higher efficacy in the LE7 and EP4C was obtained when overall spray volume was $2,000L\;ha^{-1}(65{\mu}g\;a.i.\;ml^{-1})$ than $1,000L\;ha^{-1}(130{\mu}g\;a.i.\;ml^{-1})$. Field study demonstrated that $1,300{\mu}g\;ml^{-1}$ of metabolites from KR-001 applied with EP4C at concentration of $2{\mu}g\;ml^{-1}$ provided a highly effective post-emergence weed control which was almost equivalent to the glufosinate-ammonium at $540g\;a.i.\;ha^{-1}$. On the basis of these results, combination and multiple application methods could be developed to enhance herbicidal efficacy of metabolites from KR-001.
Kim, Hye-Yun;Lee, Jae-Won;Jeffries, Thomas W.;Gwak, Ki-Seob;Choi, In-Gyu
Journal of the Korean Wood Science and Technology
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v.37
no.4
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pp.397-405
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2009
In this study, we investigated the potential of producing bioethanol from Liriodendron tulipifera by using oxalic acid pretreatment. Amounts of fermentable sugars, mostly xylose and glucose, in the liquid fraction (hydrolysate) was $40.22g/{\ell}$ after the biomass was pretreated with 0.037 g/g of oxalic acid for 20 minutes at $160^{\circ}C$. Production amounts of ethanol was $8.6g/{\ell}$ from the 72 hours of simultaneous saccharification and fermentation (SSF) on solid fraction of the pretreated sample. At the same condition, when the reaction time increased to 40 minutes, $32.66g/{\ell}$ of fermentable sugars in the hydrolysate and $9.5g/{\ell}$ of ethanol was produced from the process of pretreatment and SSF. As a result of analyzing the fermentation inhibitors, such as acetic acid, 5-HMF, furfural and total phenolic compounds, as the reaction time increased, the amount of the fermentation inhibitors in the hydrolysate increased. Production of the fermentation inhibitors was more affected by initial concentration of oxalic acid rather than reaction time. $3.39{\sim}5.78g/{\ell}$ of acetic acid was produced by pretreatment with 0.013 g/g of oxalic acid, and the amount of furfural produced by decomposition of xylose was 2~3 times higher than the amount of 5-HMF produced by decomposition of glucose. All the hydrolysates contained more than $5g/{\ell}$ of total phenols considered as the degradation product of lignin. Therefore, by analyzing the amount of fermentable sugars and fermentation inhibitors in the hydrolysate, and producing ethanol from SSF of solid fraction of the pretreated sample, the biomass pretreated with 0.037 g/g of oxalic acid for 20 minutes at $160^{\circ}C$ can be expected to produce the most ethanol.
In the present study, the total content of polyphenols and flavonoids, the antioxidant activities, and cytotoxic effects of the ethanol extracts from different parts of Taraxacum coreanum Nakai were investigated for their use as functional foods. The extract yields of the flower, leaf, and root were $32.15{\pm}3.21%$, $31.63{\pm}0.63%$, and $27.48{\pm}2.47%$, respectively. Total polyphenol and flavonoid content of the flower extract were $61.29{\pm}2.11mg/g$ and $46.11{\pm}1.88mg/g$, respectively, which were much higher than those of any other plant parts. The antioxidant activities of the flower, leaf, and root extracts were $89.99{\pm}2.83%$, $85.29{\pm}2.22%$, and $37.88{\pm}2.34%$, respectively, at a concentration of 1.0 mg/mL. Cell cytotoxicity effects of AGS (human gastric carcinoma), HCT116 (human colon carcinoma), and A549 (human pulmonary carcinoma) cells were the highest in the flower extract, with values of $62.85{\pm}4.63%$, $69.89{\pm}3.44%$, and $85.72{\pm}4.17%$, respectively, at a concentration of 400 mg/kg. Both the antioxidant activities and cytotoxic effects of the ethanol extracts from all the parts of the T. coreanum Nakai increased dose-dependently. These results provide preliminary data for the development of T. coreanum Nakai as an edible functional food material.
Journal of the Korean Society of Food Science and Nutrition
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v.30
no.4
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pp.697-702
/
2001
This study was done to investigate effects of Korean mistletoe extract and lectin on serum GOT, GPT and $\alpha$-L-fucosidase activities and the preneoplastic lesion in chemically induced rat hepatocarcinogenesis. To attain the above objectives weanling Sprangue-Dawley male rats were fed modified AIN-76 diets containing 10% corn oil for 9 weeks. One week after feeding rats were intraperitonealy injected twice with a dose of diethylnitrosamine (DEN, 50 mg/kg body weight(BW)) and were provided 0.05% phenobarbita (PB) with drinking water from one week after DEN treatment until the end of experiment. For the same period as PB treatment, rats were injected mistletoe extract (10 $\mu\textrm{g}$/kg BW European mistletoe, 10 $\mu\textrm{g}$/kg BW and 100 $\mu\textrm{g}$/kg BW Korean mistletoe) and lectin(1 ng/kg BW, 10 ng/kg BW) twice a week. At the end of 9th week rats were sacrificed and the formation of hepatic glutthione S-transferase placental form positive (GST-P+) foci serum GOT, GPT and $\alpha$-L-fucosidase activities were determined. By treatment of mistletoe extract or lectin there were no significant effects on serum GOP, GPT and $\alpha$-L-fucosidase activities whereas those activities showed a tendency to increase by DEN treatment. The formation of GST-P+ foci was significantly decreased by mistletoe extract or lectin treatment especially in group of 100$\mu\textrm{g}$/kg BW Korean mistletoe. These results suggest that Korean mistletoe extract and lectin have a possibility to inhibit hepatocarcinogenesis of animals.
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.
Kim, Sang-Hoon;Jung, Sou-Hwan;Cho, Seong-Won;Chung, Sun-Tae
Journal of the Institute of Electronics Engineers of Korea CI
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v.45
no.1
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pp.25-36
/
2008
Eye localization means localization of the center of the pupils, and is necessary for face recognition and related applications. Most of eye localization methods reported so far still need to be improved about robustness as well as precision for successful applications. In this paper, we propose a robust eye localization method using multi-scale Gabor feature vectors without big computational burden. The eye localization method using Gabor feature vectors is already employed in fuck as EBGM, but the method employed in EBGM is known not to be robust with respect to initial values, illumination, and pose, and may need extensive search range for achieving the required performance, which may cause big computational burden. The proposed method utilizes multi-scale approach. The proposed method first tries to localize eyes in the lower resolution face image by utilizing Gabor Jet similarity between Gabor feature vector at an estimated initial eye coordinates and the Gabor feature vectors in the eye model of the corresponding scale. Then the method localizes eyes in the next scale resolution face image in the same way but with initial eye points estimated from the eye coordinates localized in the lower resolution images. After repeating this process in the same way recursively, the proposed method funally localizes eyes in the original resolution face image. Also, the proposed method provides an effective illumination normalization to make the proposed multi-scale approach more robust to illumination, and additionally applies the illumination normalization technique in the preprocessing stage of the multi-scale approach so that the proposed method enhances the eye detection success rate. Experiment results verify that the proposed eye localization method improves the precision rate without causing big computational overhead compared to other eye localization methods reported in the previous researches and is robust to the variation of post: and illumination.
Kim, Tae-Su;Choi, Mi-Kyeong;Kim, Jin-Sook;Han, Jae-Woong;Kang, Myung-Hwa
Journal of the Korean Society of Food Science and Nutrition
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v.38
no.11
/
pp.1580-1586
/
2009
This study is on the effect of oil seed by-products added to Chungkukjang. For this, we designed three cases: Chungkukjang was added in with defatted sesame flour before fermented (DSFBF), added with defatted sesame flour after fermented (DSFAF) and with no adding (control). In each case, the common ingredients and the active antioxidant ingredients were examined and compared and the effects were analyzed. According to microanalysis result, carbohydrate content Chungkukjang the DSFAF 24.97%, control 23.86%, DSFBF Chungkukjang 20.21% as compared to control and Chungkukjang DSFAF relatively low carbohydrate content. The moisture contents in DSFBF (55.98%) or DSFAF (52.83%) were higher than that in control (48.89%). Chungkukjang crude ashes in DSFBF (1.48%) or DSFAF (2.41%) were much lower than in control (6.45%). The proportions of crude lipid in DSFBF (3.30%) or DSFAF (3.93%) were higher than in control (1.77%) by about 2%. As for crude protein, the percentage in DSFAF (15.86%) was lower than that of DSFBF (19.03%) or of control (19.03%). There was no meaningful difference in biological activity measurement as total phenolic contents were 1.26 mg/mL in DSFBF, 1.14 mg/mL in DSFAF and 1.26 mg/mL in control. But electron donating ability was meaningfully more active in DSFBF (21.30%) than in control (20.24%). The superoxide dismutase (SOD)-like activity in DSFBF (68.48%) was twice higher than in control (34.01%), which may imply that DSFBF contain some ingredients that can scavenge superoxide anion radically. In hydroxyl radical scavenging activity, DSFAF scores 96.87%, which is the highest with 96.40% in DSFBF and 95.73% in control. Relative antioxidative effects in DSFBF was 47.92%, which is comparable to 47.06% in control. As a result of extraction and quantitative HPLC analysis of sesamin and sesamolin extracted from the samples, DSFBF contained 3.04$\pm$0.21 mg/g of sesamin, which is meaningfully higher than 2.41$\pm$0.14 mg/g in DSFAF. Content of sesamolin was higher in DSFBF (1.36$\pm$0.09 mg/g) than DSFAF (1.12$\pm$0.07 mg/g) or in control. We can conclude that biologically active and effective ingredients could be found more in DSFBF than in DSFAF or in control. This study conveys not only the meaning that oil seed by-products can be used as an ingredient for making Chungkukjang functional food, but also the possibility that oil seed by-products themselves could become excellent functional food.
Park, Hye-Jin;Lee, Eun-Ho;Kim, Myung-Uk;Lee, Seon-Ho;An, Dong-Hyun;An, Bong-Jeun;Kwon, Joong-Ho;Cho, Young-Je
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.8
/
pp.1236-1247
/
2014
Gamma irradiated-treatment of natural medicinal plants can be used to improve extraction transference number and for qualitative improvement of color when applied to functional material exploration. This study investigated the biological activities of Aralia elata cortex extracts upon gamma irradiation. In addition, different physical techniques [photostimulated luminescence (PSL) and thermoluminescence (TL)] were used for irradiation identification of Aralia elata cortex. In PSL analysis, non-irradiated (0 kGy) sample showed a negative result of 400 photon counts (PCs), whereas irradiated (5, 10, and 30 kGy) samples showed positive results of 90,100.00, 312,614.33, and 321,661.67 PCs, respectively. In the TL method, growth curve showed very unusual behaviors around $200^{\circ}C$ upon natural-irradiation of the non-irradiated (0 kGy) sample and around $150{\sim}250^{\circ}C$ for the irradiated (5, 10, and 30 kGy) samples. The TL ratio was 0.1 in non-irradiated samples at 0.011, whereas the values of irradiated samples (5, 10, and 30 kGy) were 0.1 at 1.105, 1.009, and 2.206, respectively. For phenolics of gamma-irradiated Aralia elata cortex, water and 50% ethanol extracts had the highest amounts, $17.30{\pm}0.40mg/g$ and $18.87{\pm}0.46mg/g$ at 10 kGy irradiation, respectively. The inhibitory activities of angiotensin-converting enzyme and xanthin oxidase were higher in both irradiated water and 50% ethanol extracts than in non-irradiated ones. For pancreatin ${\alpha}$-amylase and ${\alpha}$-glucosidase inhibitory activities, water and 50% ethanol extracts containing $200{\mu}g/mL$ of phenolics showed high inhibitory activities of 60~100% at all irradiation doses (0~30 kGy). This result confirmed that Aralia elata cortex extracts have greater anti-diabetic effects than acabose as a diabetic remedy. Gamma-irradiated Aralia elata cortex extracts are useful as a functional material with anti-diabetic effects. Thus, Aralia elata cortex extracts can be used as a functional material with various biological activities, and gamma-irradiation can be used to amplify biological activities in plants.
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