Lee, Gang Woo;Ryu, Ho Jun;Kim, Il Kyung;Seong, Ho;Choi, Chang Hee
Pediatric Infection and Vaccine
/
v.6
no.1
/
pp.86-92
/
1999
Purpose : The purpose of this study is to know the epidemiology and clinical characteristics in patients with M. pneumoniae pneumonia during study period retrospectively. Methods : We had reviewed 500 patients with Mycoplasma pneumoniae pneumonia who were hospitalized at the pediatric ward of Seoul Adventist Hospital from July 1986 through June 1996. we had analysed clinical and laboratory problems of pulmonary and extrapulmonary manifestations including demographics and epidemiological characteristics. Results : Peak occurrence of the disease was 3 years interval and seasonal occurrence of the disease had no difference. 43.4% of patients was below 4 years old and male to female ratio was nearly 1:1. The most common site of infiltration on chest PA was right lower lobe and the most common type of pneumonia was interstitial pneumonia(43%). Pulmonary complications were atelectasis(11cases), emphysema(5cases), pleural effusion(27cases) and sinusitis(13cases) and extrapulmonary manifestations were hepatitis(109cases), skin rash(29cases), proteinuria(20cases) and hematuria(16cases). cold agglutinin test was carried out in 500cases and mycoplasma antibody test was carried out in 448cases. sensitivity of mycoplasma antibody test was 53.3%. Conclusion : Mycoplasma pneumoniae pneumonia showed epidemics at intervals of 3 year in its major occurrence. it exhibits a tendency that occurs at younger age group not in school age group. diagnosis of the disease need more accurate method due to low sensitivity of mycoplasma antibody test. also we need to carried out other laboratory test(for example, LFT, U/A).
Background: To evaluate the efficacy of arterial switch operation for transposition of great arteries, serial echocardiographic studies were performed in 8 patients who underwent the surgery between 1989 and 1998 at Dept. of Thoracic & Cardiovascular Surgery, Yeungnam University Hospital in Daegu City, Korea. Material and Method: Follow-up period ranged from 6 months to 11 years(average of 4.1 years). Body weight ranged from 2.6kg to 4.8kg, with average of 3.6kg. 5 of 8 patients were preoperatively diagnosed as TGA+VSD, and 3 as TGA+IVS. LV function was evaluated by the measurement of LV shortening fraction, LVSTI, and LVEF. RVSTI was also measured. Postoperative function of valve and growth of great vessels were analyzed by the measurement of PSPGV, valvular regurgitation, LA/AO ratio, root dimension of aorta and pulmonary artery, comparing with the age matched controls, respectively. Result: LVEF had an average of 65.0+9.03% which is tended to increase serially. LVAOPG had an average of 15.9mmHg. RVPAPG, 27.5mmHg. From the measurement of aortic root dimension of 6 patients at end-systole, aortic root growth was assumed to increase more than the mean value of normal growth. PA root dimension at end-systole showed a similar growth progress when compared with age matched normal controls. Postoperative pulmonic valve regurgitation was noted in 5 of total 8 patients, in which 1 patient who showed grade 2 and 4 showed below grade 1. AR, in 6 patients and all grade 1 Except 1 patient, all the valvular regurgitations were below grade 1, which was presumed to be clinically insignificant.
This study was examined the pollinating activity and the economical effect according to numbers released of Apis mellifera in the $825m^2$ strawberry (Seolhyang var.) vinyl-houses. The time-zone of pollinating activity relative to numbers of honeycomb released at the strawberry (Seolhyang var.) vinyl-houses was together from 9A.M. to 4P.M., and the peak time of pollinating activity was 11A.M.. The effects on pollinating activity relative to the honeycomb numbers in the honeybee hive released at the strawberry houses were ordered 5 honeycombs (11,000 heads), 4 honeycombs (8,800 heads) and 3 honeycombs (6,600 heads). The rate of workers lost in A. mellifera hives with 5 honeybee combs and 4 honeycombs during the strawberry cultivating period were lower than that of 3 honeycombs. The rates of fruit set by pollinating activity relative to the honeycomb numbers in the honeybee hive released at the strawberry vinyl-houses were same level with over 98%. The fruit qualities; No. of seeds, sugar content and rate of normal fruit set were same level, but fruit weights were ordered 5 honeycombs in 37.2 g, 4 honeycombs in 35.6 g and 3 honeycombs in 32.6 g. The marketing incomes of 4 honeycombs and 5 honeycombs were 9% to 13% higher than that of 3 honeycombs, respectively. Therefore, when the strawberry (Seolhyang var.) was planted at $825m^2$ of a vinyl-houses, it was surveyed that the most suitable numbers of honeycomb were over 4 honeycombs (8,800 heads).
Park, Ji-eun;Yang, Yoo-sun;Hamm, Yeon-su;Lee, Na-Hee;Sung, Jong-Sang
Journal of the Korean Institute of Landscape Architecture
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v.49
no.6
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pp.64-79
/
2021
In Korea, mountains constitute 60 percent of the total land area. For a long time, mountains have been deeply involved in people's daily lives, acting as a significant layer of culture. For those reasons, it would be meaningful to shed light on the values of the mountain culture of Korea and seek various ways to utilize them. Therefore, this study aims to explore Korea's mountain enjoyment culture, considering the mountain leisure in the Joseon Dynasty period, when the heritage of mountain enjoying culture was prevalent, and that of the present era. For the analysis, hiking records of the Joseon Dynasty and present-day hiking blog posts related to three famous mountains in Korea were examined. Findings show that people stayed in the mountains for a long time in the Joseon Dynasty, concentrating on the landscape deeply, and various academic and artistic cultures flourished there. In contrast, contemporary people regard the mountain merely as a space to access the peak and climb down quickly within a day. Therefore, the landscape of the mountain cannot be used as a cultural asset beyond natural scenery. However, there are several positive aspects to today's climbing culture. For example, it is easy to obtain information on climbing and feasible ways to conduct various sizes and concepts of hiking due to the development of technology and transportation. In order to develop Korea's unique mountain enjoyment culture in the future, we should propose a 'leisurely hike' that allows people to enjoy the mountain scenery fully and sublimating it into culture, rather than being hiking that is limited to climbing. In addition, it is essential to create suitable spaces, arranging them appropriately to utilize the history and humanities context of the mountain, and connect local facilities and the workforce, thereby causing the development of various mountain enjoyment cultures.
Ki, Kyong-Seok;Gim, Ji-youn;Yoon, Ki-Sang;Lee, Jae-Yoon
Korean Journal of Environment and Ecology
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v.30
no.4
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pp.724-729
/
2016
Environmental factors that affect the singing of cicadas have not been studied extensively, especially those affecting the cicadas' singing during the nighttime. Therefore, the objective of this study is to identify the effects of tropical night and light pollution on the cicadas' singing in a downtown area. The study sites were an apartment complex in Seocho-gu, Seoul, and the Chiaksan National Park in Wonju-si. The study subjects were Hyalessa fuscata and Cryptotympana atrata, which are the dominant species in Korea during summer. Cicada songs were recorded 24 hours a day, every day. The recording period was between July and August, lasting 25 days at the Seoul site and 14 days at the Chiaksan National Park. Temperature, precipitation, humidity, and amount of sunshine were selected as the environmental factors that potentially affect the cicadas' singing. Statistical analyses included correlations of meteorological factors with the cicadas' singing per hour, per 24 hours, and at nighttime (21:00~04:00). The results showed that: 1) H. fuscata began singing during the dawn hours, and the singing increased in intensity early in the morning. C. atrata's singing reached its peak in the morning and afternoon, ceased during sunset hours, thereby exhibiting a difference in the singing pattern of the two species. 2) The frequency of singing by H. fuscata decreased when C. atrata began to sing intensively in numbers, thereby exhibiting interspecific influence. 3) The results of the correlation analysis between meteorological factors and the singing of H. fuscata and C. atrata showed that both species tended to sing more when the temperature was higher and sang less on rainy days. 4) When limited to nighttime only, C. atrata showed a tendency of singing when the nighttime temperature was high ($24-30^{\circ}C$, average $27^{\circ}C$), whereas H. fuscata did not show a correlation with meteorological factors. However, since H. fuscata sang during the night in areas with artificial lighting, it was concluded that its singing was due to light pollution.
Queens of Korean native bumblebee species, Bombus ignitus were collected from the field in the spring of 1998 to investigate their ecological characteristics and reared under the laboratory conditions; 3 0 f 1$^{\circ}$C, 55 25% of relative humidity and darkness. As a result, 94.4% of the queens laid eggs in 6.00f 2.41 days after the field collection. The first worker and the first drone from the egg cell of the collected queens appeared in 18.90 f 1.16 and 68.96 f 3.94 days, respectively. In the colony foundation, 86.1% of the collected queens founded their colony, and 96.8% of them produced new queens in 71.14f 6.88 days. The life span of the colony-founded queen covered for 86.90f24.35 days, whereas that of non-colonized queen for 15.67 f 7.37 days. One colony sized as big as 987.82f 145.84 in number, composing of workers (188.79f 18.23), drones (691.10f 159.24) and queens (107.93 f47.48). Copulation lasting time of queen and drone took 23.00f 7.33 minutes in average. In a new queen emergence, there were two patterns; single peak type of new queen emergence in 12.31 k6.95 days and two peaks type of it in 74.00f 17.61 days. The number of eggs per egg cell of new queen averaged as 8.86f 4.00 grains and an egg period covered 3 days after oviposition. An egg cell sized as 7.15 f0.88 mm in a width, 7.79 f 1 .l 1 mm in a length and 3.33 f 0.23 mm in a height. An egg shaped as banana and sized as 1.22 f 0.09 mm in a width and as 3.5 1 f 0.21 mm in a length, weighing as 2.70 + 0.30 mg.
Critical temperature for grain filling of three Korean japonica rice varieties was analyzed by late transplantation to induce a low temperature during grain filling period in a field study. The grain filling percentage (GFP) and grain dry weight (GDW) showed a sigmoid development for the first and second transplants in 2020 and first to third transplants in 2021. For the third transplant in 2020 and fourth transplant in 2021, the GFP and GDW reached a peak at 42 days after heading (DAH), and then decreased or remained unchanged. In non-linear regression analyses, 95% of the final GFP and GDW appeared at 49 - 62 DAH for the second transplant in 2020 and at 37 - 46 DAH and 30 - 36 DAH for the second and third transplants in 2021, respectively. At these time points, the critical seven-day moving temperature (7dMovT) was 8.4~9.4℃ for the second transplant in 2020 and 9.4~10.9℃ for the second and third transplants in 2021, depending on the grain filling traits and varieties of rice. The lowest 7dMovT was 8.4 - 8.7℃ in the three varieties. The observed lowest 7-day mean temperature (7dMT) accompanying increases in the GFP and GDW was 9.4 - 10.1℃, depending on the varieties in the third transplant of 2020 and fourth transplant of 2021. In the two transplants mentioned above, the highest 7dMT that showed no increase or decrease in grain filling traits was 8.7 - 9.1℃. The critical temperature for grain filling of japonica rice was 8.4 - 8.7℃ based on the 7dMovT and 9.1 - 9.4℃ based on the 7dMT. The previous 7dMT of 10℃ is recommended to determine the marginal harvest time for safe rice cropping since the temperature was the highest among the lowest temperature that accompanied an increase in grain filling traits.
Kim, Geum-Soog;Kim, Jung-Kon;Seong, Jae-Duck;Park, Chang-Kie;Suh, Hyung-Soo;Kwack, Yong-Ho
Korean Journal of Medicinal Crop Science
/
v.4
no.2
/
pp.139-144
/
1996
This research was carried out to clarify effects of cultural condition on the content of Alisol B-monoacetate, whose function is antihypercolesterol in blood, and yield in Alisma Rhizomes. When the corm part of Alisma Rhizomes was extracted by shaking extraction at $25^{\circ}C$ and reflux extraction at $40^{\circ}C$ to $100^{\circ}C$ four times, the total content of Alisol B-monoacetate was 0. 402%, 0. 425% and 0. 402% at $25^{\circ}C$, $40^{\circ}C$ and $60^{\circ}C$ respectively. The recovery rate was 97% by three times extraction at $25^{\circ}C$, and 96% and 97% by three times extraction at $40^{\circ}C$ and $60^{\circ}C$ respectively. When the corm was harvested on Oct. 30, the content of Alisol B-monoacetate was 0. 46% but it was increased to 0. 71% on Nov. 30. In the case of Oct. 30, the corms of $S(4{\sim}14g\; FW)$ size were determined to contain the highest level of Alisol B-monoacetate (0. 53%), and the content was decreased as the corn size was increased. This tendency was also adopted on Nov. 30. On the other hand, the content of crude protein and starch was changed rarely by the period of harvest. When the planting depth was $0{\sim}1cm$, the yield was the highest as 206kg/10a, and the yield was decreased as the planting depth was deep. The variation of the content of Alisol B-monoacetate was small as 0. 33% to 0. 39% by planting depth. From the above results it could be concluded that the optimum time for harvest of Alisma Rhizomes is Nov. 30 and the optimum planting depth is $0{\sim}1cm$.
Journal of the Korea Academia-Industrial cooperation Society
/
v.10
no.5
/
pp.1082-1090
/
2009
Peak expiratory flow rate(PEF) is a very important diagnostic parameter obtained from the forced vital capacity(FVC) test. The expiratory flow rate increases during the short initial time period and may cause measurement error in PEF particularly due to non-ideal dynamic characteristic of the transducer. The present study evaluated the initial rise slope($S_r$) on the flow rate signal to compensate the transducer output data. The 26 standard signals recommended by the American Thoracic Society(ATS) were generated and flown through the velocity-type respiratory air flow transducer with simultaneously acquiring the transducer output signal. Most PEF and the corresponding output($N_{PEF}$) were well fitted into a quadratic equation with a high enough correlation coefficient of 0.9997. But only two(ATS#2 and 26) signals resulted significant deviation of $N_{PEF}$ with relative errors>10%. The relationship between the relative error in $N_{PEF}$ and $S_r$ was found to be linear, based on which $N_{PEF}$ data were compensated. As a result, the 99% confidence interval of PEF error was turned out to be approximately 2.5%, which was less than a quarter of the upper limit of 10% recommended by ATS. Therefore, the present compensation technique was proved to be very accurate, complying the international standards of ATS, which would be useful to calibrate respiratory air flow transducers.
Kim, Jun-Hwan;Jeong, Eun-Ha;Kim, Seok-Ryel;Kim, Su Kyoung;Kim, Su-Kyoung;Hur, Young Baek
Korean Journal of Environmental Biology
/
v.37
no.2
/
pp.155-163
/
2019
The Paralichthys olivaceus (mean weight 34.3±3.5 g) was used in the conduction of density experiment in this study to establish the optimal density determination for a period of 13 weeks. The density consisted of four groups. These were group 1 (500 fish, 40 fish m-2), group 2 (750 fish, 60 fish m-2), group 3 (1,000 fish, 80 fish m-2) and group 4 (1,250 fish, 100 fish m-2), each in 12.56 ㎡ circular water tanks. In the high density groups, such as groups 1 and 2, the nitrite was increased to over 21 mg L-1 (group 3) and 25 mg L-1 (group 4). The experiment of the groups was terminated by skin ulcers and mortality after 49 days for group 3 and 43 days for group 4. The water quality environment, such as the water temperature, dissolved oxygen, salinity and pH, remained constant. The ammonia and nitrite in groups 1 and 2 remained stable after ammonia and nitrite peak. However, the experiments in groups 3 and 4 were terminated due to the mortality induced by high nitrite. Hematological parameters, such as hemoglobin and hematocrit, were significantly decreased in the high density groups. The plasma components were significantly changed in the high density groups, such as groups 3 and 4. The mean weight of groups 1 and 2 after 13 weeks were 91.3 g and 83.7 g, respectively. The survival rates were 99.4% and 98.2%, respectively. The final FCR was 0.6 in both groups. The results of this study show that the density of 80 fish m-2 or more induce mortality due to high nitrite with hematological changes. Additionally, they indicate that the 60 fish m-2 indicate proper density in bio-floc environment in olive flounder weighing less than 100 g.
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