To understand the relative contribution of varietal and environmental variation on various grain quality components in rice, grain appearance, milling recovery, several physicochemical properties of rice grain and texture or palatability of cooked rice for milled rice materials of seven cultivars(five japonica & two Tongil-type), produced at six locations of the middle and southern plain area of Korea in 1989, were evaluated and analyzed the obtained data. Highly significant varietal variations were detected in all grain quality components of the rice materials and marked locational variations with about 14-54% portion of total variation were recognized in grain appearance, milling recovery, alkali digestibility, protein content, K /Mg ratio, gelatinization temperature, breakdown and setback viscosities. Variations of variety x location interaction were especially large in overall palatability score of cooked rice and consistency or set- back viscosities of amylograph. Tongil-type cultivars showed poor marketing quality, lower milling recovery, slightly lower alkali digestibility and amylose content, a little higher protein content and K /Mg ratio, relatively higher peak, breakdown and consistency viscosities, significantly lower setback viscosity, and more undesirable palatability of cooked rice compared with japonica rices. The japonica rice varieties possessing good palatability of cooked rice were slightly low in protein content and a little high in K /Mg ratio and stickiness /hardness ratio of cooked rice. Rice 1000-kernel weight was significantly heavier in rice materials produced in Iri lowland compared with other locations. Milling recovery from rough to brown rice and ripening quality were lowest in Milyang late-planted rice while highest in Iri lowland and Gyehwa reclaimed-land rice. Amylose content of milled rice was about 1% lower in Gyehwa rice compared with other locations. Protein content of polished rice was about 1% lower in rice materials of middle plain area than those of southern plain regions. K/Mg ratio of milled rice was lowest in Iri rice while highest in Milyang rice. Alkali digestibility was highest in Milyang rice while lowest in Honam plain rice, but the temperature of gelatinization initiation of rice flour in amylograph was lowest in Suwon and Iri rices while highest in Milyang rice. Breakdown viscosity was lowest in Milyang rice and next lower in Ichon lowland rice while highest in Gyehwa and Iri rices, and setback viscosity was the contrary tendency. The stickiness/hardness ratio of cooked rice was slightly lower in southern-plain rices than in middle-plain ones, and the palatability of cooked rice was best in Namyang reclaimed-land rice and next better with the order of Suwon$\geq$Iri$\geq$Ichon$\geq$Gyehwa$\geq$Milyang rices. The rice materials can be classified genotypically into two ecotypes of japonica and Tongil-type rice groups, and environmentally into three regions of Milyang, middle and Honam lowland by the distribution on the plane of 1st and 2nd principal components contracted from eleven grain quality properties closely associated with palatability of cooked rice by principal component analysis.
Jae-Cheol Nam;Myoung-Seok Suh;Eun-Jeong Lee;Jae-Don Hwang;Jun-Young Kwak;Seong-Hyen Ryu;Seung Jun Oh
Atmosphere
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v.33
no.2
/
pp.275-295
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2023
In Korea, there are four institutions related to atmospheric science: the university's atmospheric science-related department, the Korea Meteorological Administration (KMA), the ROK Air Force Weather Group, and the Meteorological Industry Association. These four institutions have developed while maintaining a deep cooperative relationship with the Korea Meteorological Society (KMS) for the past 60 years. At the university, 6,986 bachelors, 1,595 masters, and 505 doctors, who are experts in meteorology and climate, have been accredited by 2022 at 7 universities related to atmospheric science. The KMA is carrying out national meteorological tasks to protect people's lives and property and foster the meteorological industry. The ROK Air Force Weather Group is in charge of military meteorological work, and is building an artificial intelligence and space weather support system through cooperation with universities, the KMA, and the KMS. Although the Meteorological Industry Association has a short history, its members, sales, and the number of employees are steadily increasing. The KMS greatly contributed to raising the national meteorological service to the level of advanced countries by supporting the development of universities, the KMA, the Air Force Meteorological Agency, and the Meteorological Industry Association.
An epidemiological study and mass treatments of Enterobius vermicularis infection among children near Wonju area of Kangwon province were carried out. The children were divided into 4 groups according to their residing localities; children in the mountainous area, rural area, urban area and in orphanage. They were examined by adhesive cellotape anal swab technique, and egg positive rates were obtained. The rates of egg reduction and re-infection rates after repeated mass treatments were also observed. The results obtained were as follows: 1. The overall egg Positive rate of E. vermicularis in the first screening was 19.9% (251 out of 1, 262 examinees; 19.7% in males and 20.1% in females). The positive rates were 13.0% in the mountainous area, 11 9% in the rural area, 15.1% in the urban (medium-sized) area and 61.9% in orphanages. 2. The highest positive rates were observed in the kindergarten children, and 1st and 2nd grade children of primary schools (26.2~32.2%), and the lowest rate (13.6%) in 6-year grade children of primary schools. 3. Cumulative detection rates from 3 repeated anal swabs at 4~5 days interval were higher (70.8%) than those from single anal swabs (50.0~59.2%). 4. Out of the examinees who showed the highest cumulative positive rate (70.8%), about 39.2% were consecutively positive in 3 anal swabs. Among different groups of children, the higher the total egg detection rates (87.5%), the higher the consecutive positive rates (71.9%) . 5. A total of 2, 609 (male : female=1 : 12.4) worms were collected from 17 egg-positive cases treated with anthelinintics. The mean number of worms per child was 153 (range: 4-824) . 6. The egg-positive cases in several studied groups (180 children) were treated with anthelmintics 6 times at 3-week intervals. In this case, the overall positive rate was decreased from 54.8% to 2.2% at 15 weeks after the treatments, but no complete negative conversion was experienced. However, in a group of children (154 children) including egg Positive and negative cases who were both treated with anthelmintics at 3-week interval, a complete egg-negative conversion was observed in the 9th week after treatments. 7. The egg-detection rate in the brothers or sisters of egg Positive children was 70.0% (28 out of 40 examined), and the egg-positive rate according to the family unit was 69.7%. In summarizing the above results, it is concluded that Enterobius vermicularis infection is still highly prevalent among children in Korea, and that repeated mass treatments of more than 3 times will be effective for control of this infection.
Journal of the Society of Cosmetic Scientists of Korea
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v.34
no.4
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pp.275-286
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2008
In this study, we investigated the anti-oxidative, anti-wrinkle and whitening effects of Platycarya strobilacea bark extracts. The free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity ($FSC_{50}$) of extract / fractions of Platycarya strobilacea was in the order: 50% ethanol extract ($6.75{\mu}g/mL$) < deglycosylated aglycone fraction ($6.62{\mu}g/mL$) < ethyl acetate fraction ($4.15{\mu}g/mL$). Reactive oxygen species (ROS) scavenging activities ($OSC_{50}$) of some Platycarya strobilacea extracts on ROS generated in $Fe^{3+}$-EDTA/$H_2O_2$ system were investigated using the luminol-dependent chemiluminescence assay. The order of ROS scavenging activity was ethyl acetate fraction (OSC50, $0.56{\mu}g/mL$) < 50% ethanol extract ($0.02{\mu}g/mL$) < deglycosylated aglycone fraction ($0.01{\mu}g/mL$). The deglycosylated aglycone fraction showed the most prominent scavenging activity. The protective effects of extract / fractions of Platycarya strobilacea on the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. The ethanol extract (50%) suppressed photohemolysis in a concentration dependent manner, particularly ethyl acetate fraction exhibited the most prominent cellular protective effect (${\tau}_{50}$, 717.27 min at $10{\mu}g/mL$). The inhibitory effect of Platycarya strobilacea extracts on tyrosinase were investigated to assess their whitening efficacy. Finally, their anti-elastase activities were measured to predict the anti-wrinkle efficacy in the human skin. The inhibitory effect ($IC_{50}$) on tyrosinase of some Platycarya strobilacea extracts was 50% ethanol extract ($243.98{\mu}g/mL$) < ethyl acetate fraction ($153.87{\mu}g/mL$) < deglycosylated aglycone fraction ($137.53{\mu}g/mL$). Also, The inhibitory effect of elastase ($IC_{50}$) of some Platycarya strobilacea extracts was 50% ethanol extract ($31.01{\mu}g/mL$) < ethyl acetate fraction ($14.42{\mu}g/mL$) < deglycosylated aglycone fraction ($1.48{\mu}g/mL$). The cream containing the ethyl acetate fraction of Platycarya strobilacea extracts was formulated. The skin hydration, transepidermal water loss, and the whitening effects were investigated after topical application of the cream. The skin hydration of cream containing extract was increased by $2{\sim}8%$ than the placebo cream, transepidermal water loss was decreased. The cream containing extract suppressed the melanogenesis of skin by 9.55% than the placebo cream. These results indicate that extract / fractions of Platycarya strobilacea can function as antioxidants in biological systems, particularly skin exposed to UV radiation by anti-oxidative activity and protect cellular membranes against ROS. The inhibitory effect on elastase and tyrosinase, and the increase of skin hydration and the whitening effect of the cream containing extract could be applicable to new functional cosmetics for antiaging.
Journal of the Korean Society of Food Science and Nutrition
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v.41
no.12
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pp.1663-1670
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2012
The inhibitory effects of rose hip (Rosa canina L.) water extracts from two different manufactures on osteoarthritis was comparatively investigated in primary cultures of rat cartilage cells. To identify the effects of rose hip extracts against $H_2O_2$ (300 ${\mu}M$, 2 hr) treatment, cell survival was measured by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell survival increased by rose hip extracts in the range of 100 to 600 ${\mu}g/mL$ of $H_2O_2$ treatment. To determine the anti-inflammatory effects of rose hip extracts, tumor necrosis factor alpha (TNF-${\alpha}$), nitric oxide (NO), and Cox-2 expression were measured after lipopolysaccharide (LPS) activation. TNF-${\alpha}$ level with rose hip extract treatment was decreased by 27.4% and 31.9% at 600 ${\mu}g/mL$ of $H_2O_2$ treatment. Nitric oxide was inhibited by rose hip extract at 100~600 ${\mu}g/mL$ of $H_2O_2$ treatment in a dose-dependent manner. In addition, Cox-2 protein expression was dose-dependently decreased while Cox-1 had no change in expression level. The severity of osteoarthritis is controlled by a balance between anabolic and catobolic factors in an articulation, therefore the expression of these factors plays a critical role in preventing osteoarthritis. In measuring anabolic factors, the genetic expression of collagen type I increased with rose hip treatment, while the genetic expression of collagen II did not change. In addition, the genetic expression of aggrecan (proteoglycan core protein) was significantly increased. while the genetic expression of matrix metalloproteinase (MMP) 3, 7 and 13, known catabolic factors, was significantly inhibited by treatment with rose hip extract. The expression of MMP13 was especially highly influenced. In conclusion, rose hip water extracts show inhibitory effects on cell death by $H_2O_2$ mediated oxidative stress, which is related to inhibitory effects on inflammation due to TNF-${\alpha}$, NO, and Cox-2. The ability of rose hip extracts to ameliorate inflammation in primary cultures of cartilage cells seems to associate with an increased genetic expression of specific anabolic factors, collagen type I and aggrecan, and a decreased expression of catabolic factors, MMPs (3, 7, and 13). However, there were no significant differences between rose hip extracts from the two manufacturers.
Purpose : We have studied the changes of cardiac troponin I(cTnI) level and left ventricular ejection fraction(LVEF) before and after treatment of IVGG to evaluate the efficacy of single high dose of intravenous gammaglobulin(IVGG)(2.0gm/kg) therapy for improving cardiac function and clinical symptoms and signs in patients with clinically suspected acute myocarditis. Methods : The patients consisted of 18 cases who admitted increased cTnI with clinically suspected acute myocarditis caused by viral infection, Kawasaki disease and fever unknown origin(FUO) from Jan. 1995 to Jun. 1998. The control group consisted of 20 cases suffered from hand-foot-mouth disease, herpangina and high fever with rash. The level of cTnI was measured by Chemiluminiscent immunoassay method(normal<0.1ng/ml) and cardiac function was evaluated by left ventricular ejection fraction(LVEF)(normal 64~83%) by echocardiogram. Results : The level of cTnI increased to $0.306{\pm}0.209ng/ml$ and LVEF decreased to $60.1{\pm}1.6%$ before treatment of IVGG significantly as compared with control group(P<0.05). All cases were returned to normal range of LVEF($71.4{\pm}3.7%$) and decreased cTnI significantly($0.089{\pm}0.082ng/ml$) after treated with IVGG within 1 week in patients group(P<0.05). Conclusion : The single high dose of IVGG(2.0gm/kg) therapy was rapid and effective improvement of cardiac function and clinical symptoms and signs of acute myocarditis, and the measurement of serum cTnI and LVEF may help to diagnose and evaluate efficacy of IVGG on it.
Kim, Jiyoung;Shin, Minseo;Kim, Sunghee;Seo, Jihyun;Ma, Hyesun;Yang, Yoon Jung
Journal of Nutrition and Health
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v.50
no.4
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pp.350-360
/
2017
Purpose: This study examined and compared the associations of the iron status and food intake with the blood lead, mercury, and cadmium concentrations among Korean adolescent girls, premenopausal women, and postmenopausal women. Methods: The data from the 2010~2011 Korea National Health and Nutrition Examination Survey (KNHANES) was used. The subjects were classified into three groups: adolescent girls (n = 268), premenopausal women (n = 1,157), and postmenopausal women (n = 446). The iron status was assessed by hemoglobin, hematocrit, serum ferritin, and iron concentrations, as well as the total iron binding capacity (TIBC). The food intake was estimated by a food frequency questionnaire. Results: The blood heavy metal concentrations and poisoning rate in postmenopausal women were higher than in the other groups. The iron status in the adolescent girls and postmenopausal women was higher than that in the premenopausal women. In the adolescent girls, the iron status was inversely associated with the blood cadmium concentration. The dairy food intake was inversely related to the blood lead and cadmium concentrations. In premenopausal women, the iron status was inversely associated with the cadmium concentrations. The fish and shellfish food intakes were positively associated with the mercury concentrations. In postmenopausal women, the iron status was positively associated with the mercury and cadmium concentrations. Fast foods and fried foods were inversely associated with the lead concentration. Conclusion: The premenopausal women showed a lower iron status than the adolescent girls and postmenopausal women. The associations of the iron status with the blood heavy metal concentrations were different among the adolescent girls, premenopausal women, and postmenopausal women. In addition, the relationships of the food intakes with the blood heavy metal concentrations differed among adolescent girls, premenopausal women, and postmenopausal women. Further studies will be needed to confirm these findings.
Choe, Jae Young;Jang, Kyung Mi;Hwang, Young Ju;Choi, Bong Seok;Park, Jong Kwang;Yoon, Young Ran;Kim, Chan Duck;Cho, Min Hyun
Childhood Kidney Diseases
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v.18
no.1
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pp.18-23
/
2014
Purpose: The pharmacokinetics of tacrolimus, one of the most widely used immunosuppressive drugs, are known to vary by sex, age, and ethnicity during pediatric transplantation. This study assessed the pharmacokinetic characteristics and associated factors of tacrolimus in Korean children receiving a kidney transplant. Methods: We retrospectively reviewed the pharmacokinetic data (therapeutic dose, trough level, clearance, and half-life) of 9 children who were given tacrolimus as one of their initial immunosuppressive drugs after kidney transplantation. In addition, we compared the findings to data from 10 adult kidney transplant recipients. Results: The mean age of our pediatric patients was 13.9 years, and the maleto- female ratio was 4:5. The mean dose of tacrolimus was $0.19{\pm}0.14$ mg/kg/day. The mean dose of tacrolimus for males was $0.23{\pm}0.12$ mg/kg/day, which was significantly higher than the dose for females ($0.16{\pm}0.14$ mg/kg/day). The trough level was not significantly different between both groups. The clearance rate of tacrolimus for males was also significantly higher than females. Although the dosage of tacrolimus for patients over the age of 12 years was lower ($0.18{\pm}0.13$ vs. $0.21{\pm}0.16$ mg/kg/day) and the trough level was higher ($8.2{\pm}4.5$ vs. $7.2{\pm}4.2$ mg/mL) than that for patients under the age of 12 years, there was no significant difference between them. However, there were significant differences between children and adults in dose, clearance, and half-life of tacrolimus. Conclusion: Out study suggests that the pharmacokinetics of tacrolimus tends to vary with sex and age. Therefore, large-scale prospective studies are required to verify the proper therapeutic dosage of tacrolimus in Korean children.
This study aimed to investigate consumption status of cooked rice with different grains as well as examine related factors of Koreans. Based on the Korea National Health and Nutrition Examination Survey of the second year (2011) in the fifth stage, we extracted data on 7,190 people aged 1 year and higher who consumed cooked rice with one or more grains and legumes for at least one meal per day. A total of 15,250 meals were analyzed. Approximately 67.6% of subjects consumed cooked rice with different grains for more than one meal. Age was the strongest influencing factor for consuming cooked rice with different grains. Compared with people in their 40s, those aged 19~29 and in their 30s showed lower probabilities (0.5 and 0.6, respectively) of intake of cooked rice with different grains, whereas those in their 50s and 60s showed relatively higher probabilities (1.9 and 5.0, respectively). The intake ratio of cooked rice with different grains was higher in subjects who were females (64.5%), aged 1~18, over 50s, and residing in a metropolis (62.0%). Breakfast (69.6%) showed a higher intake ratio of cooked rice with different grains compared to lunch (49.1%) and dinner (57.9%). Intake of cooked rice with different grains was highest at home (71.2%), whereas it was lowest in restaurants (11.2%). The findings of the current study may be useful in planning dietary guidelines for intake of cooked rice with different grains.
Antioxidative effects of the water or ethanol extracts from Rhus verniciflua Stokes (RVS) were measured by protection against hydroxyl radicals in mouse brain tissue culture. In the water extracts from RVS, cell viabilities were estimated 60.0, 66.0, 72.0, 84.0 and 90.0% at addition of 1, 2, 4, 7 and $10{\mu}L$, respectively, compared with GO (20 mU/mL) alone. The cell viability in the ethanol extracts was similarly with water extracts. In the antitumor effects, the results showed that percentages of the HeLa cell death were approximately 24% for 12 hrs, 57% for 48 hrs at addition of 10%/well ethanol extracts respectively. To know inhibition of tumor growth, in vivo, mice (BALB/c) were inoculated with 0.25 mL CT-26 $(1{\times}10^6\;cells/mL)$ subcutaneously. After the generation of tumor, the results of RVS extracts (ethanol, water) injection showed generally that the tumor size in BALB/c was reduced. For physicochemical characterization of the RVS extracts, purified substances of water or ethanol extracts were analized with SDS-PAGE and ICP spectrometer. In electrophoresis, gel showed 2 bands (210, 230 KDa). The results of ICP verified that RVS extracts contain $Cu^{2+}$ in both samples. Conclusively, this substance might be a laccase which has a biological effective function, as a natural bioactive substance.
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