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鄭東均,鄭素英,李孝宰,金各均,吳貴玉,李種昕 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1
Two-part experiment was conducted to elucidate the effects of several trace elements, rice and spices on caries rate in Korean albino rats. Rats were selected into two large groups according to their weight ; one group (for part I experiment) consists of rats weighing 140-200gm and the other group (for part II experiment) consists of rats weighing 76-109gm, and the same experiment was conducted independently for both groups. Rats were fed standard cariogenic diet supplemented with rice (21, 53%), capsicum (1, 10%), garlic (0.5, 5 or 10%), phosphorus (2%), sodium chloride (3%, reagent grade), or table salt. Drinking water was tap water containing cold water extract of capsicum (0.1%) alcoholic extract of capsicum (0.1%), water extract of ginseng (2%), fluoride (10, 50 or 100ppm) or 50ppm of Mg, Zn, Mo, Sr, Mn of Fe. The results were as follows. 1. 24.9%, 51.0% and 54.3% decrease in caries score were recorded for rats which drank water containing 10, 50 and 100ppm of fluoride in part I experiment. In part II experiment caries score decreases 51.8% and 56.9% for 10ppm and 50ppm fluoride content. 2. Capsicum-fed rats showed 51.7% (capsicum 1%) and 58.1% (capsicum 10%) decrease in caries score in part I experiment. 21.5% and 33.6% decrcase were recorded for part II experiment. 3. Garlic-fed rats showed 44.5% (garlic 0.5%), 23.0% (garlic 5%) and 53.7% (garlic 10%) decrease in caries score. 4. Sodium chloride-fed rats showed 122.6% (NaCl 3%) increase in caries score. 5. Rats which were fed diet containing 2% Na_2HPO_4 showed 26.7% decrease in caries score and further 41.6% decrease when 10ppm fluoride was given simultaneously. 6. 28.4% and 31.5% decrease in caries score were recorded for rats which drank water containing 50ppm of Mg and Zn.
정동균,이종흔,김각균,이공훈,오귀옥,정태영 대한구강생물학회 1980 International Journal of Oral Biology Vol.4 No.1
Those studies were performed to elucidate the effects of several dietary spices on dental caries and to determine which component of spices induced the change of incidence of dental caries in Sprague-Dawley rats which were supplied from SNU animal house. For this study, 132 rats (rats weighing 90-140 gm) were chosen at random with the same number of both sexes and divided into eleven experimental groups which contained the differential components of drinking water and diets for control and experimental group. Control group was fed standard cariogenic diet and tap water. In experimental groups, rats were fed standard cariogenic diet supplemented with capsicum (10%), ash capsicum (1, 10%), garlic (5%), common salt (3%), and analytical salt (3%) for 80 days. Drinking water was tap water containing water extract of capsicum (1, 10%), water extract of garlic (1.1%), and fluoride (50ppm). The results were as follows. 1. 54.6 in caries score was recorded in control group. 2. Rats which drank water containing 50ppm of fluoride showed 18.4% decrease in caries score. 3. Capsicum-fed rats showed 10.7% (capsicum 10%) increase in caries score and rats which drank water containing water extract of capsicum (1, 10%) showed 14.1% (w.e. capsicum 1%) and 0.16% (w.e. capsicum 10%) increase in caries score. But ash capsicum-fed rats showed 18.7% (ash capsicum 1%) and 7.3% (ash capsicum 10%) decrease in caries score. 4. Garlic-fed rats showed 22.1% (garlic 5%) decrease in caries score. But rats which drank water containing 1.1% of water extract of garlic showed 24.1% increase in caries score. 5. 58.4% and 68.0% increase in caries score were recorded in rats which were fed diet containing common salt (3%) and analytical NaCl (3%), respectively.
정동균,정태영,이종흔,김중수,오귀옥,이효재 대한구강생물학회 1980 International Journal of Oral Biology Vol.4 No.1
This experiment was conducted to elucidate the relation between the urinary fluoride concentration and the fluorosis index of residents in Mankyung River valley, especially in 3 areas (Yookang-ri, Koje·Yoochun, Shinbok·Yongkang) with high fluoride concentration in drinking water. The urinary fluoride concentration was measured by fluoride ion electrode, and dental fluorosis was surveyed and analysed by Dean and McKay's and Horowitz's method. 1. There was no reletionship between the urinary fluoride concentration and age. 2. 11-20 years age groups has revealed the highest fluofosis index. In this group : 3. There showed a parallel relationship between the fluorosis index and the urinary fluoride concentration. 4. DMF rates of residents in Yookang-ri, Koje and Shinbok are 59.2, 48.4 and 47.1%, respectively. 5. There showed a parallel relationship between the years of residence within 8 years after birth and the fluorosis index.
丁東均,李種昕,李孝宰,金各均,吳貴玉,鄭泰英 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1
The urinary fluoride concentration and the degree of dental fluorosis of all the schoolboys attending Chimoon primary school in Baikku-myun, Kimjae-kun and the fluoride concentration of drinking water of those areas were investigated in an effort to elucidate the relation between them. The urinary fluoride concentration and the fluoride concentration of driking water were measured by fluoride ion electrode, and dental fluorosis was surveyed and analysed by Dean and McKay's and Horowitz's method. 1) The mean urinary fluoride concentration and the mean fluorosis index of all the schoolboys were 1.89ppm (0.12-12.2ppm) and 0.79 (0-1.99). The mean fluoride concentration of drinking water of those areas was 0.61ppm (0.027-2.66ppm). 2) The mean urinary fluoride concentration and the mean fluorosis index of the schoolboys residing in Yookang-ri 5-ku, Baikku-myun (Dongja-po) were the highest (3.23ppm, 1.99) among the statistics for the schoolboys residing in different areas. Incidentally the fluoride concentration of drinking water for that area was also the highest (1.99ppm). 3) The urinary fluoride concentration was two to ten times as high as the fluoride concentration of drinking water regardless of the resident area of schoolboys. 4) There was no significant seasonal change in fluoride concentration of drinking water collected from the well in the resident area of schoolboys. 5) There showed a relatively parallel relationship between the urinary fluoride concentration and the fluorosis index of schoolboys. 6) The urinary fluoride concentration and the fluorosis index of schoolboys tend to increase with age increasing.
정태영,정동균,이효재,김각균,오귀옥,이종흔 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1
Insoluble extracellular polysaccharides synthesized by Streptococcus mutans type d strain B-13 were analysed in an effort to elucidate their chemical composition. Dextransucrase produced in supernatant was also studied for its activity. 1. The microorganism produced 2.10g of total insoluble fraction which contained 1.59g of insoluble polysaccharide and 0.41g of bacterial mass per 800ml of culture medium. 2. Insoluble fraction contained 26.1㎍/mg of nitrogen and 746.4㎍/mg of insoluble extracellular polysaccharides. Ketohexose content of polysaccharides was 7.12%. 3. Streptococcus mutans strain B-13 was capable of producing 4.10g insoluble extracellular polysaccharide per 1.0g of bacterial mass. 4. Dextransucrase liberated 5.11mg of hexose per 1ml of culture supernatant.
이종흔,정동균,김중수,이효재,김각균,오귀옥,정태영 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1
Mineral analyses of water samples from several areas of the Mankyung River and the Dongjin River regions in Chonrabukdo where dental fluorosis was observed, which had been conducted between June in 1978 and January in 1979, have shown the following results. In general, the mean calcium concentrations were high in the areas where the mean concentrations of phosphorus and fluoride were low. And in the same area where dental fluorosis was particularly observed, seasonally a few minerals were variable─namely, calcium, phosphorus, and fluoride. Those samples of high fluoride concentration have higher phosphorus concentration, but calcium concentrations were the opposite phenomenon. Particularly, fluoride concentrations were remarkably greater during the cold season(January) than during the rainy season(July).
An 155.52Mbps Physical Layer Processor for ATM Applications
Kim,Sung Do,Jung,Hee Bum,Kim,Kwi Dong,Chai,Sang Hoon,Song,Won Chul,Kim,Kyung Soo 대한전자공학회 1997 ICVC : International Conference on VLSI and CAD Vol.5 No.1
An analog/digital mixed-signal physical layer processing IC for ATM UNI/NNI interface is presented. This ASIC consists of three modules, which are a receiver, a transmitter, and a SDH processor. In the design of receiver and transmitter modules analog full custom PLL circuits are used. The SDH processor is designed with digital standard cell libraries. The chip has been implemented using 0.8㎛ digital CMOS process technology. The experimental result shows power consumption of 950mW at 155.52Mbps.
Assessment of risk factors for Korean children with Kawasaki disease.
Kim, Jae-Jung,Hong, Young Mi,Yun, Sin Weon,Han, Myung Ki,Lee, Kyung-Yil,Song, Min Seob,Lee, Hyoung-Doo,Kim, Dong Soo,Sohn, Sejung,Ha, Kee-Soo,Hong, Soo-Jong,Kim, Kwi-Joo,Park, In-Sook,Jang, Gi Young,L Springer International] 2012 Pediatric cardiology Vol.33 No.4
<P>Kawasaki disease (KD) is the most common cause of acquired heart disease in children. Intravenous immunoglobulin (IVIG) is the standard therapy for KD, but more than 10% of KD patients do not respond to IVIG and are at high risk for the development of coronary artery lesions (CALs). To identify clinical and genetic risk factors associated with CAL development and IVIG nonresponsiveness, this study analyzed the clinical data for 478 Korean KD patients. Multivariate logistic regression analysis showed that incomplete KD, IVIG nonresponse, fever duration of 7??days or longer, and the CC/AC genotypes of the rs7604693 single nucleotide polymorphism (SNP) in the PELI1 gene were significantly associated with the development of CALs, with odds ratios (ORs) ranging from 2.06 to 3.04. The risk of CAL formation was synergistically increased by the addition of individual risk factors, particularly the genetic variant in the PELI1 gene. Multivariate analysis also showed that a serum albumin level of 3.6??g/dl or lower was significantly associated with nonresponsiveness to IVIG [OR, 2.76; 95% confidence interval (CI), 1.34-5.68; P??=??0.006]. Conclusively, incomplete KD, IVIG nonresponsiveness, long febrile days, and the rs7604693 genetic variant in the PELI1 gene are major risk factors for the development of CALs, whereas low serum albumin concentration is an independent risk factor for IVIG nonresponsiveness.</P>
Blood Compatibility of Novel Zwitterionic PEG-Grafted Nitinol Alloy for Peripheral Arterial Stents
Kim, Jae Hoon,Son, Jun Sik,Park, Kwi Deok,Kim, Jong Man,Kim, Jae Jin,Ahn, Kwang Duk,Han, Dong Keun Trans Tech Publications, Ltd. 2007 Key Engineering Materials Vol.342 No.-
<P>In this study, newly synthesized zwitterionic PEG was grafted on Nitinol alloy using oxidation treatment. The surface property and blood compatibility of surface-modified Nitinols were examined. The results of surface analysis showed that the contact angle and the ratio of oxygen to carbon significantly decreased with Nitinol alloys. The total amount of fibrinogen (0.095 μg/cm2) adsorbed onto TiNi-PEG2K-N+-S- was lower than that of TiNi control (0.12 μg/cm2). The platelet adhesion decreased in the order of TiNi control > TiNi-MPEG2K > TiNi-PEG2K-N+-S. Particularly, zwitterionic PEG with PEG2K was proven better than any others. The results indicated that zwitterionic PEG surface could significantly suppress platelet adhesion and protein adsorption as compared to other samples. The present study suggested that grafted zwitterionic PEG structure may possess improved blood compatibility.</P>