Choi, Jin-Yong;Park, Jae-Sung;Kim, So Ra;Park, Mijung
Journal of Korean Ophthalmic Optics Society
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v.16
no.4
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pp.383-390
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2011
Purpose: The present study was conducted to investigate whether refractive powers of soft contact lenses were induced by the deposition of tear proteins when wearing soft contact lenses. Methods: The soft contact lenses (material: etafilcon A, hilafilcon A and comfilcon A) with refractive powers of -1.00 D, -3.00 D, -5.00 D and -7.00 D were incubated in artificial tear for 1 day, 3 days, 5 days, 7 days and 14 days, respectively. After incubation, their refractive powers were measured by wet cell method with an auto-lens meter and their protein deposited on the lenses was determined by the method of Lowry. Results: Among three types of soft contact lenses, the most protein deposition was detected in ionic etafilcon A lens material and significant change of its refractive power was manifested. In other words, refractive powers of etafilcon A lenses firstly decreased after 1 day incubation in artificial tear and then gradually increased with increasing incubation period again. The observed change in refractive powers of all diopters of etafilcon A material was beyond the scope of standard error and bigger in the lens with lower optical power. On the other hand, non-ionic hilafilcon A showed less protein deposition as much as about 20% in etafilacon A and statistically significant increase of refractive powers with increasing incubation period in artificial tear. The change in refractive power of hilafilcon A was also beyond the scope of the standard of error when incubating in artificial tear and greater in the lens with lower diopter. The least protein deposit was shown in silicone hydrogel lens material, comfilcon A as approximately 10% of it in etafilcon A, indicating less change in refractive power within the standard range of error. Conclusions: The large change of refractive powers that was beyond the scope of standard error by the deposition of tear proteins on soft contact lenses was differently detected depending on lens materials in the current study. Thus, the deposition of tear proteins induced by longer period of lens wearing may be one of the causes that induces blurred vision, suggesting that soft contact lens wearers with the amount of tear proteins may need to choose proper lens material.
A study on Bang-Yak-Hap-Py$\breve{u}$n, one of the most widely-known Korean medicine books, has been conducted and the findings are as follows:the political and social background at the end of Yi-dynasty amidst the inflow of western civilization and the aggression of foreign forces can be seen as a historical period of trial, when civilization and independence had to be preserved at the same time, during the period, the social trend was to pursue a rapid practical solution rather than a profound theory. Responding to this trend, simple and easy medical science became to prevailand the representative medicine book of this kind was Bang-Yak-Hap-Py$\breve{u}$n. 1. Bang-Yak-Hap-Py$\breve{u}$n was written comprising the characteristics of simple and easy medical science with a view to popularizing-collection of logics, easy readability, medical science in time, etc. 2. Bang Yak-Hap-Py$\breve{u}$n, rich and grand in content, came out of Dong-$\breve{U}$i-Bo-Gam at the right moment as a pragmatic guide book of Korea medical practice symbolizing Korean spirit. 3. Do-yun Whang whose pen name was Hye-Am was born in Changwon, Kyungnam-do as the 18th descendant of Changwon Whang family. He engaged in medical practice in Seoul and wrote and edited Boo-Bang-Py$\breve{u}$n-Ram. $\breve{U}$i-Jong-Son-Ik, $\breve{U}$i-J$\breve{u}$ng-Son-Ik-Bu-Yeo, $\breve{U}$i-Bang-Whan-Tu, ect. and made his son, Pil-Su follow him and let him edit Bang-Yak-Hap-Py$\breve{u}$n, which put $\breve{U}$i-Bang-Whal-Tu and Son-Ik-Bon-Cho together. 4. The construct of Bang-Yak-Hap-Py$\breve{u}$n can be subdivied into three parts: herbs of 34 classes and 514 kinds were arranged on the upper part and $\breve{U}$i-Bang-Whal-Tu was arranged on the middle end lower part. Such arrangement can be very effective in clinics. 5. Bang-Yak-Hap-Py$\breve{u}$n as a curative book of Korean medical science has been a necessary another ego for many Korean medical practioners. It also played a great role of enhancing Korean oriental medical science to be widely used by Koreans. On the other hand, it produced a side effect of emergence of employed medical practioner who lacked in scholastic aptitude. 6. Tens or newly edited Bang-Yak-Hap-Py$\breve{u}$n have been issued. Among them, Jung-Jeong, Bang-Yak-Hap-py$\breve{u}$n, J$\breve{u}$ng-Mak-Bang-Yak-Hap-Py$\breve{u}$n. By$\breve{u}$n-J$\breve{u}$ng-Bang-Yak-Hap-Py$\breve{u}$n, and By$\breve{u}$n-J$\breve{u}$ng-Bang-Yak-Jung-Jeon have been widely known. Lately, Bang-Yak-Hap-Py$\breve{u}$n which includes more symptoms and remedies or is translated into Korean came out in several kinds. 7. The number of korea classical medicinal books quoted in Bang-Yak-Hap-Py$\breve{u}$n is 68, among which Dong-$\breve{U}$i-Bo-Gam Occupies the top in the list enlisting 69 medicinal treatment. This Shows that Dong-$\breve{U}$i-Bo-Gam gave birth to Bang-Yak-Hap-Py$\breve{u}$n.
The morphological and structural studios of Anisakinae larva has been carried out since Sept. of 1980. The larva were collected from naturally infested eleven swine of 1,531 examined at Kwang-Ju abattoir and from marine fishes, Somber japonicus, bought at Kwang-Ju fish market. The results observed were as follow : 1. Anisakis larva found in the stomach wall and on the surface of the mucosa were more or less degenerated. According to the progress of degeneration, the cross sections showed varied structures (Fig. 6, 7). 2. Size of the larva both from swine and fishes were measured respectively in average(mm); 18.0 and 18.7 in body length, 0.30 and 0.41 in body width, 1.64 and 1.68 in esophagus(muscular-part), 0.56 and 0.67 in ventriculus (glandular part), and 0.13 and 0.12 in tail. It was notable that body length of the larva in this present data, 18.0mm and 1.87mm, were shorter than those in previous dada, 24.3mm from human cases and 28.4mm from, however, the present data were almost similar to the data, 1.75mm, from swine case. 3. The Boring tooth, Mucron, long ventriculus and short round tail were observed in the larva of this present study. These structures were differentiated from Anisakis type II larvae which was provided with short ventriculus, and conical and tapering tall without mucron. 4. The ventricular appendix and intestnal caecum were not present in the larva. These might be differentiated from other Anisakidae larva such as Terranova larvae, Contracaecum larvae, Raphidascaris larvae and Thynnascaris larvae. 5. The findings through the histological observation were a pair of Y-shaped or butterfly-shaped lateal chords, ventral and dorsal chords, excretory(Renette) cell, high columnar epithelial cells of digestive tract and muscle cells. These morphological characteristics revealed varied features in the structures in the degenerative degree of the larva in the stomach wall. 6. The above-mentioned characteristics of the larva observed could be indentified as Anisakis type I larvae. 7. The reports on natural infestation of domestic animal with Anisakis type I larvae were two swine cases in Korea and Japan respectively, On the other hand two human cases of the larva were reported in Korea and more than one thousand cases in Japan. In Twiwan no reports of human and domestic animal cases could be found.
Phenomenon of vegetation recruitment on the sand bar is drastically rising in the streams and rivers in Korea. In the 1960s prior to industrialization and urbanization, most of the streams were consisted of sands and gravels, what we call, 'White River'. Owing to dam construction, stream maintenance, etc. carried out since the '70s, the characteristic of flow duration and sediment transport have been disturbed resulting in the abundance of vegetation in the waterfront, that is, 'Green River' is under progress. This study purposed to identify the correlation among water level, water temperature, rainfall, soil moisture and soil texture out of the factors which give an effect on the vegetation recruitment on the sand bar of unregulated stream. To this purpose, this study selected the downstream of Naeseong Stream, one of sand rivers in Korea, as the river section for test and conducted the monitoring and analysis for 289 days. In addition, this study analyzed the aerial photos taken from 1970 to 2009 in order to identify the aged change in vegetation from the past to the present. The range of the tested river section was 361 m in transverse length and about 2 km in longitudinal length. According to the survey analysis, the tested river section in Naeseong Stream was a gaining river showing the higher underground-water level by 20~30 m compared to Stream water level. The difference in the underground water temperature was less than $5^{\circ}C$ by day and season and the Stream temperature did not fall to $10^{\circ}C$ and less from May when the vegetation germination begins in earnest. The impact factor on soil moisture was the underground water level in the lower layer and the rainfall in the upper layer and it was found that all the upper and lower layer were influenced by soil particle size. The soil from surface to 1 m-underground out of 6 soil moisture-measured points was sand with the $D_{50}$ size of 0.07~1.37 mm and it's assumed that the capillary height possible in the particle size would reach around 14~43 cm. On the other hand, according to the result of space analysis on the tested river section of unregulated stream for 40 years, it was found that the artificial disturbance and drought promoted the vegetation recruitment and the flooding resulted in the frequency extinction of vegetation communities. Even though the small and large scales of recruitment and extinction in vegetation have been repeated since 1970, the present vegetation area increased clearly compared to the past. It's found that the vegetation area is gradually increasing over time.
Journal of the Korean Institute of Traditional Landscape Architecture
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v.31
no.3
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pp.25-37
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2013
The purpose of this study is to draw reasonable management plans to reinforce essence of Ohyundan(五賢壇: Five sprit tablets), a sacred site and monument of Jeju, by investigating and analyzing current status and problems of cultural landscape elements(e.g. architectural structures, installation, letters carved on the rocks, actual vegetation, etc.) while grasping placeness contained in Ohyundan through consideration of its history and transition process of Ohyundan a future being and shrine of Gyulrim Seowon(橘林書院) in Jeju. Results derived from research are summarized as follows. Ohyundan is noted due to its placeness in that it was a place for Gyulrim Seowon, Jeju's one and only Saaek Seowon(賜額書 院) and it was a symbolic space of exile culture in Jeju. As it is inferred from Gyulrim Seowon, which is dangho(堂號: clan name) of Seowon, orchards surrounding all over places are a signature landscape element that shows placeness of the past Ohyundan. Joduseok(俎豆石: altar stone), representing a core installation of Ohyundan and ancestral tablet of five spirits, created a refined place by putting up common stones around altar and founding blocked stones to wall. This refinement and thrift served basic mind of Neo-Confucianism, and led to of Jeju's Jonyang mind(spend-thrift mind). In conclusion, a practice plan is a prerequisite to restore essence of Ohyundan by actively excluding installations not suitable for placeness or overly designed such as Jeju Hyangrodang(a center for the elderly) and numerous monument houses. On the other hand, together with Joduseok, as letters carved on the rocks such as 'Jeungjoo Byukrip(曾朱壁立)' and 'Gwangpoongdae(光風臺)' and Yoocheonseok serve as a signature landscape that well shows mind of five spirits and teaching of Neo-Confucianism, and also a trace from a confucian viewpoint deeply rooted in Jeju, they are judged as a cultural landscape corresponding to the essence of place in Ohyundan which requires proactive preservation and plans for public relations. Together with this, although many different old big trees such as Pinus densiflora , Pinus thunbergii, Quercus variabilis, Celtis sinenis, Zelkova serrata and Rhus succedanea are a landscape element that increases sacred Ohyundan and commemorative value, now required is thorough entity tree management by assigning serial number on them as many of them were dead or removed resulting from transition process of land use. Further, to reinforce quality of site location belonging to Gyulrim Seowon, a prerequsite is to review plans that create Gyulrim at reinstalled site of building and raw land.
The study aims to identify the pathogenicity of Phytophthora. capsici isolates in major pepper-producing areas in Korea and the inherit genetic pattern of phytophthora blight resistance by inocula. With five kinds of testing materials including 'Kataguma (Sakata Korea)' peppers, a disease-susceptible material, '#308', a phytophthora blight resistance material, 'CM334', and their $F_1$ and $F_2$, respective isolates of P. capsici obtained from Icheon, Eumseong, Buan, Imsil and Yeongyang regions together with six kinds of peppers' inoculum including PA-159 (KACC No.40482) received from Korean Agricultural Culture Collection were used for inoculation. The disease-susceptible material '#308', the resistant material 'CM334' and the non-segregating generation of $F_1$ represented 4.94-5.00, 1.00-1.07, and 1.01-1.08 phytophthora blight incidence respectively in the group comparison by isolate. This result means that the phytophthora blight resistance was clearly distinguished among testing materials in the group comparison by P. capsici isolate. Moreover, $F_2$ segregating generation showed 1.79-2.31 phytophthora blight incidence which turned out to be identical in the group comparison by the six isolates of P. capsici isolate and with similarity between both the resistant and susceptible materials. Thus, the result proved that using the six isolates of P. capsici tested as inocula was suitable to investigate the phytophthora blight resistance. When it comes to group comparison of $F_2$ segregation generation, however, isolates were divided with PA-159 isolate being the center: a group consisting of isolates from Icheon, Buan, and Imsil and a group consisting of Yeongyang and Eumseong isolates with higher pathogenicity. The expected segregation ratio of the phytophthora blight resistance in $F_2$ generation by isolate was analyzed. PA-159 isolate showed 3:1 or 9:3:3:1, indicating that one to two genes were involved. On the other hand, results also proved that there is an interaction of genes since both Eumseong and Yeongyang isolates showed a segregation ratio of 11:5 while the Icheon isolate represented 12:3:1.
Remineralization of acid-etched enamel across the time has been one of the curiosities in the context of the orthodontic biomechanics(Arends J. et al., IRL Press, 1, 1985), nevertheless, is so far controversial. It was the aim of this study to observe the remineralization patterns of acid-etched enamel across the time and whether the existence of fluoride might carry out any modifications. The intact buccal surfaces of the first bicuspids which was extracted for orthodontic treatment were ground smooth, and etched with a 38w/w% phosphoric acid for 60 seconds, The surface was observed by the scanning electron microscope and surface microhardness was measured after immersion in the fluoride or non-fluoride containing remineralizing solution for 0 hour, 12 hours, 1 day, 3 days, 7 days, 14 days, 28 days, and 42 days. The following results and conclusions were drawn; 1. Surface microhardness increased in both fluoride containing and non-fluoride containing solution group with time lapse. 2. In fluoride containing solution group, the surface microhardness sharply increased at the 12 hours group, on the other hand, surface microhardness increased at 3 days in non-fluoride containing solution group. 3. The difference in microhardness value between two groups manifested gradual decrease. 4. Scanning electron microphotographs disclosed that the fluoride containing solution group generated spiculate sub-stances in the 12 hours group, which was increased in number and size with time lapse. 7 days later, spherical composure was began to be produced, The spiculate substances so much increased in number that the etched enamel surface looked like flat in 42 days. 5. In non fluoride-containing solution group, there was no surface change at 42 days, perceivable in scanning electron microphotographs which could be defined as remineralization though the surface was a little rougher than the incipient etched surface. These results demonstrate that the action of the fluoride is exceedingly pertinent in the remineralization of acid-etched enamel and the remineralization process goes uninterruptedly with time lapse.
Lee, Hyo-Won;Lee, Hyo-Jin;Kim, Won Ho;Yoon, Bong Ki;Ko, Han Jong
Journal of The Korean Society of Grassland and Forage Science
/
v.36
no.4
/
pp.318-324
/
2016
In order to study the effect of barley, Italian ryegrass (IRG), and legume mixture on nitrogen fixation and transfer to grasses on spring paddy field, an experiment was carried out from Oct. 2006 to June 2007 in Naju, Korea. A split plot design with three replications was used for the experiment. One reference plot was assigned for each treatment to determine nitrogen fixation. Main plots consisted of Chinese milk vetch, crimson clover, forage pea, and hairy vetch with barley, respectively. Subplot treatment were barley or IRG with four seeding ratio of legumes (50:50, 60:40, 70:30, and 80:20). To estimate N fixation by legumes, $^{15}N$ isotope dilution technique was used. $^{15}N$ fertilizer [$(^{15}NH_4)_2SO_4$ solution at 99.8 atom N] was uniformly applied to $600cm^2$ in the middle of each plot on April 15, 2007. Plots were harvest by hand on June 8, 2007. Dried sample were ground to a fine power and analyzed for total N isotope N. $^{15}N$ was determined using elemental analyzer-isotope ratio mass spectrometry. The calculation of N transfer was determined with the isotope dilution method. The content of N was higher in legumes than that in barley or Italian ryegrass. Nitrogen level in forage pea was significantly higher than that of other legumes. There were significantly differences in N content between legumes in IRG mixture. Atom % $^{15}N$ excess was significantly different in legumes with barley. The 60:40 sub plot had higher (p<0.05) atom % $^{15}N$ than other seeding ratio treatments. The enrichment ranged from 0 to 0.58. Compared to barley, the enrichment of IRG with its accompanied legumes was higher, ranging from 0.38 to 1.0. The N derived from the atmosphere (Ndfa) ranged from 0% to 49.5% with barley-legume mixture. It ranged from 0 to 60.5% in IRG-legume plots. N transfer from legumes to neighboring grasses was 12.3 to 90.9 kg/ha for barley-legume mixture and 31.7 to 107.8 kg/ha for IRG plots. IRG plots showed higher N transfer for IRG-legume mixture in general based on difference method. Based on $^{15}N$ dilution method, the N transfer was 0 to 36.1 kg/ha for barley-legume mixture and 0 to 50.6 kg/ha for IRG plots. There was a tendency toward higher N transfer on the difference method than that of the $^{15}N$ dilution method.
Journal of the Korean Society of Earth Science Education
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v.13
no.2
/
pp.162-174
/
2020
This study aimed to develop a creative education class program using metaphor, one of the creative thinking techniques, and to examine the effectiveness of the program targeting for randomly sampled 338 students in six middle schools. The creative education class program with the metaphor was developed based on content elements concerning 'astronomy' in 2015 science curriculum revision in South Korea. The program was tested for validity after being modified and supplemented three times by forming a group of experts, and the final version of the program was applied to school education fields during four periods, including block time. To find out the effectiveness of the program and the implementation, creative education class satisfaction test and creative thinking process test were conducted. That is to say, the creative education class satisfaction test was conducted before treatment and the creative thinking process test was implemented both before and after treatment. The results of the study are as follows. First, in this study, the program was developed with the emphasis on students voluntarily and actively participating in creative education programs while utilizing creative thinking methods. Second, the statistical results of the pre- and post-class about the creative education program using the metaphor of creative thinking techniques represented significant results(p<.05). In other words, the two-dependent samples by students' pre-and post-score about the creative education class showed significant statistical test results (p<.05). It turned out that the creative education program using metaphor has had a positive impact on research participants. Third, in regards to the results of the creative education class satisfaction test, 101 out of 338 students(30%) answered 'Strongly Agree' and 137(41%) answered 'Agree', indicating the subjects' satisfaction with the class was high in general. On the other hand, concerning difficulties of the creative class, 137(41%) answered "Lack of time" as the main factor, followed by 98(30%) "Difficulties of problems they were required to solve", 73(22%) answered "Conflicts with friends", and 24(7%) said "Difficulties of contents." These responses were taken into account as considerations for further development of creative education programs.
Journal of the Korean Institute of Landscape Architecture
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v.46
no.1
/
pp.61-71
/
2018
This study sought to interpret the Ya-Aeng (夜櫻) from the viewpoint of urban society, focusing on the occurrence of the Ya-Aeng at Changgyeongwon (昌慶苑) in the modern city of Kyungsung. When the Ya-Aeng started in the 1920s, the social aspects of Kyungsung were in a transitional period from the traditional to the modern. The social modernization of Kyungsung has had a dramatic impact on the Ya-Aeng as a part of the city culture. Using the concept of 'phantasmagoria', which was widespread in Kyungsung society and the Ya-Aeng, this study has established three implications of the Ya-Aeng. First, Kyungsung's phantasmagoria appeared in the form of crowds, spectacles, and experiences. This study suggests that such interpretation also applies to the Ya-Aeng. This means that the capitalism-controlled modern society on one hand and the Ya-Aeng on the other had the same mechanism. Therefore, the Ya-Aeng, as modern city culture, becomes a miniature version of Kyungsung and a modern commodity world in itself. Second, the fact that phantasmagoria is a major element of the landscape of the Ya-Aeng means that there is a special way of seeing. For modern subjects, the phantasmagoria of the Ya-Aeng has acted as a learning mechanism for a modern way of seeing. Third and finally, the phantasmagoria of the Ya-Aeng was an illusion to encourage the continued consumption of this culture and at the same time, forget about the capitalism-controlled urban culture. At this time, capitalism was dominated by the influence of Japanese imperialism. The significance of this study lies in that it expands the idea of the Ya-Aeng from the events inside Changgyeongwon into the urban culture, which is a projection of modern urban society. In addition, where the Ya-Aeng in the past had been regarded as a decadent and poor-quality spring celebration in comparison to the traditional spring celebration, this study proposes a new point of view for the Ya-Aeng in an urban social context.
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