There is relatively high vulnerability of soil erosion in slope highland agriculture due to a reclamation of mountain as well as low surface covering in early summer season with high rainfall intensity time. The aim of this study was to evaluate various surface covering methods for reducing soil loss in highland radish cultivation in highland. The experiment was conducted in 17% sloped lysimeter ($2.5m{\times}13.4m$) with 8 treatments including covering with cut rye, sod culture of rye, Ligularia fischeri var. spiciformis Nakai, Arachniodes aristata Tindale, Aster koraiensis Nakai, Festuca myuros L. and mulching with black polyethylene film, and runoff water, eroded soil and radish growth were investigated. Surface covering with sod culture and plant residue, especially cut rye treatment, had lower runoff water than non-covering, whereas black polyethylene film mulching had the reverse. The amount of eroded soil was also lowest in cut rye treatment, $0.3Mg\;ha^{-1}$, and increased in the order of rye sod culture, Ligularia fischeri var. spiciformis Nakai, Aster koraiensis Nakai, Festuca myuros L., Arachniodes aristata Tindale, black polyethylene film, and non-covering, $68.2Mg\;ha^{-1}$. The results showed that surface covering with sod culture or plant residue could be effective for reducing runoff water and soil erosion in the radish field, significantly in cut rye treatment. On the other hand, in sod culture of rye, Aster koraiensis Nakai and Ligularia fischeri var. spiciformis Nakai, radish yields were lower than in the non-covering. Unlike this, covering with cut rye, sod culture of Festuca myuros L. had similar radish yield to the non-covering radish yield. In conclusion, covering with cut rye and sod culture of Festuca myuros L. were beneficial for reduction of soil loss without decreasing in radish yield in highland sloped fields.
This study was carried out to investigate the improvement effect of soil fertility by incorporation of GMC(green manure crops) at rice cropping after cultivation GMC such as the barley for alternative rye in paddy field over the past two years(2006~2007). Plots, which consisted of incorporation time of GMC as rye; heading stage, barley; heading stage, heading stage of rye and 10days after heading stage were divided by amount of applied rates; standard fertilizer fertilization, diagnosis fertilization and non-fertilization. we investigated change of soil physico-chemical properties, degree of decomposition on GMC in soil, growth and yield potential. The obtained results were summarized as follows. The fresh weight of GMC at incorporation time on heading stage of rye, heading stage and 10days after heading stage of barley were $2,715,\;2,352,\;2,867kg\;10a^{-1}$ respectively. Content of total nitrogen at three incorporation times was 1.31, 1.46, 1.38% and the C/N ratio were 33.4, 28.7, and 34.6, respectively. Some soil physical properties, such as soil hardness and bulk density tended to decrease with incorporation of GMC, while surface soil depth and porosity were increased. Some soil chemical properties, such as content of exchangeable cations and cation exchangeable capasity(CEC) were increased with incorporation of GMC compared with before experiment. Rice yields was increased 3~9% in diagnosis application plots on application of barley compared with control($559kg\;10a^{-1}$) and incorporation of barley caused to improve perfect kernel ratio 73.6~78.7% in appearance characteristics of brown rice compared with cotrol(73.0%). It was found that incorporation with 10days after heading stage of barley was more effective to reduce chemical nitrogen fertilizer and to improve soil fertility.
This study investigated the relation between frailty, social support, and health-related quality of life to provide basic data to improve the health-related quality of life of old-old elderly who are a high risk group for frailty. For this descriptive study, one-on-one interviews with structured questionnaires were conducted for elderly aged 75 years or older at elderly welfare facilities in K county from March 01 to 31 in 2016, and a total of 211 elderly were interviewed. The collected data were analyzed by t-test, Pearson's correlation coefficient, and path analysis using SPSS/WIN and AMOS 18.0 program. For the differences between the age groups, those aged over 80 years had a significantly higher frailty (t=-2.51, p=.013) and a lower health-related quality of life than those aged below 80 years (t=3.29, p=.001); however, there was no significant difference in social support (t=1.28, p=.201). The correlation between frailty, social support and health-related quality of life showed that as frailty became higher, social support (r=-.21, p=.003) and health-related quality of life (r=-.65, p<.001) were significantly lower, and health-related quality of life was significantly higher with a higher social support (r=.18, p=.010). As a result of investigating the mediating effects of frailty between social support and health-related quality of life, social support had a significant direct effect on frailty (${\beta}=-.21$, p=.016) and frailty had a significant direct effect on health-related quality of life (${\beta}=-.06$, p=.004); however, social support had no significant direct effect on health-related quality of life (${\beta}=.00$, p=.562). Social support had a significant indirect effect on health-related quality of life and a mediating effect on frailty (${\beta}=.01$, p=.012); therefore, the full mediation effect of frailty between social support and health-related quality of life was verified. Social support prevents frailty, and improving frailty enhances health-related quality of life. Therefore, it is necessary to develop a multifactorial frailty prevention program that includes age-specific social support strategies to improve the health-related quality of life in old-old elderly.
Yang, Hyeon;Kim, Kyung-Woon;Kim, Jeom Sun;Woo, Jae-Seok;Lee, Hwi-Cheul;Choi, Hoonsung;Jung, Sun Keun;Sureshkumar, Shanmugam;Lee, Haesun;Oh, Keon Bong;Byun, Sung June
Korean Journal of Poultry Science
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v.46
no.1
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pp.17-24
/
2019
Chickens have been considered as well-defined animal bioreactor. The optimized ovalbumin promoter is essential for recombinant protein production in transgenic chicken. Here we try to compare the activity and identify the effect of estrogen on ovalbumin promoter according to each promoter length with estrogen response element (ERE) existence. We cloned two (2.8 and 5.5 kb) ovalbumin promoters that the 5.5 kb contained the ERE but the 2.8 kb did not, and these two promoters were cloned to pGL4.11 vector. Additionally, we constructed another pGL4.11 vector containing of the 4.4 kb (with ERE) ovalbumin promoter deleted with 1 kb between ERE region and the 2.8 kb promoter. For reporter assay, HeLa, MES-SA, LMH/2A, and cEF cells were transfected with all the pGL4.11 vectors. The comparative analysis showed that the mutated 4.4 kb promoter has more potent activity than the 2.8 and 5.5 kb promoters in HeLa, MES-SA, and LMH/2A cells. However, there is no significant difference in cEFs. Also, these cells transfected with the mutated 4.4 kb promoter were treated with the $17{\beta}$-estradiol (0~3,000 nM) and HeLa, MES-SA, and LMH/2A cells showed estrogen responsibilities, but cEFs did not. Besides, the mutated 4.4 kb promoter has still higher activity than the 2.8 and 5.5 kb promoter, and there is no transcriptional induction effect in 2.8 kb promoter at 500 nM estrogen that is blood concentration of laying hens. Hence our study strongly suggested that the mutated 4.4 kb promoter is considered as one of the most efficient length for generating transgenic chicken.
Kim, Si Hyun;Park, Bo Bin;Hong, Sung Eun;Ryu, Sung Ryul;Lee, Jang Ho;Kim, Sa Hyun;Lee, Pyeongjae;Cho, Eun-Kyung;Moon, Cheol
Korean Journal of Clinical Laboratory Science
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v.51
no.2
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pp.245-251
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2019
This study examined the effects of 2-methoxy-1,4-naphthoquinone (MQ) on the monocyte chemoattractant protein-1 (MCP-1)-induced migration of monocytes, which is an important phenomenon for the body defense and immune response. MQ is a major component extracted from Impatiens balsamina leaves, which have been used for many years in Asian medicine for the treatment of a range of diseases and pain. The cytotoxicity of MQ began to appear at a concentration of $10{\mu}M$, and approximately 50% cytotoxicity was confirmed at $100{\mu}M$. The MCP-1 induced migration of the THP-1 monocyte cell line increased after MQ treatment in a dose dependent manner and the largest increase was observed at $0.1{\mu}M$. The level of cAMP expression decreased after a treatment with $0.1{\mu}M$ MQ. The phosphorylation of extracellular signal-regulated kinases 1/2 (Erk1/2), a key signaling protein involved in the signaling pathway of C-C motif chemokine receptor 2 (CCR2), a receptor for MCP-1, was increased by the simultaneous treatment of $0.1{\mu}M$ MQ. These results show that MQ increases the MCP-1-induced migration of THP-1, decreases the level of cAMP expression, and increases the level of Erk1/2 phosphorylation.
Cheongeumrok is the journal of Gwonwoo(卷宇) Hong Chan-yu(1915-2005) during the period of January 9, 1969~January 14, 1982. He was personally involved in the foundation of a corporation called Yudohoi and also all of its operation, which makes him the most knowledgeable person about its history. His Cheongeumrok thus seems worthy enough as a proper material to arrange its history. Cheongeumrok consists of total 19 books, amounting to approximately 3,300 pieces of squared manuscript paper containing 200 letters per piece. He wrote it in Chinese and sometimes followed the Hangul-style word order while writing in Chinese. Many parts of the manuscript were written in a cursive hand with many Chinese poems embedded throughout it. The manuscript offers major information related to the corporation Yudohoi extracted from his journal. 1. There was a meeting of promoters to commemorate the foundation of the corporation in November, 1968, and it was in January, 1969 that it was established after getting a permit from the Ministry of Culture and Communication in January, 1969(Permit No. of Ministry of Culture and Communication: Da(다)-2-3(Jongmu(宗務)1732.5)). 2. Its office was moved from the original location of the 3rd floor of Wonnam Building, 133-1 Wonnam-dong, Jongro-gu, Seoul(currently Daekhak Pharmacy in front of Seoul National University Hospital) to Room 388 of Gwangjang Company, 4 Yeji-dong, Jongro-gu(office of Heungsan Social Gathering) and to second floor of KyungBo building, 21 Kyansu-dong, and to 3rd floor of Geongguk Building in Gyeongwoon-dong. 3. Its operational costs were covered by the supports of Seong Sang-yeong, the eldest son of Seong Jong-ho, the chairman of the board, later Kim Won-tae and Gwon Tae-hun, next chairmen of the board, and Hong Chan-yun, a director, since 1979. 4. His Confucian activities include participating in Seonggyungwan Seokjeonje (成均館 釋奠), joining in the erection of the Parijangseo(巴里長書) Monument and the publication of its commemorative poetry book, compiling the biographies(not completed) of Confucian patriotic martyrs for independence, and participating in the establishment of family rituals and regulations as a practice member. 5. His Yudohoi had a dispute with Seonggyungwan and lost a suit at the High Court in July, 1975 and Supreme Court in February, 1976. 6. There were discussions about its unification with Seonggyungwan Yudohoi, but there was hardly any progress. 7. Yudohoi started to provide full-scale courses on Confucian and Chinese classics under the leadership of Director Hong Chan-yu in 1979, and they have continued on today. Its courses for scholarship students including those for common citizens boast a history of 29 years and 220 graduates.
You, Soojin;Han, Seung Won;Kim, Kwang Jin;Jeong, Na Ra;Yun, Ji Hye
Korean Journal of Environmental Biology
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v.38
no.4
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pp.658-666
/
2020
The purpose of this study was to select a suitable planting substrate for multilayered plantings in an apartment landscape space. The experiment was conducted between May to October 2019, at the National Institute of Horticultural and Herbal Science. Planting substrate was prepared in six repetitions of eight treatment zones using mulching material, horticultural soil, bottom ash, and subgrade soil. Rosa hybrid 'Barkarole' and Hydrangea macrophylla 'Nikko Blue' were selected as the experimental plants. We investigated the monthly variation and effect of the substrate type on the growth (plant height, number of branches, leaf length, leaf width, and plant area of the substrates) of the plants. In R. hybrid 'Barkarole' grown in 20 cm of horticultural soil and 10 cm of bottom ash, the plants were taller(102.2±5.8 cm), had more branches (5.5±0.6 each), longer leaves (10.9±1.0 cm), and greater leaf width (6.2±0.5 cm) and plant area (4077.1±416.6 cm2)(p<0.05). H. macrophylla 'Nikko Blue' showed the best growth from 3cm of mulching, 20cm of horticultural topsoil, and 10cm of bottom ash, which resulted in taller plants (43.6±2.1 cm), more branches (4.9±0.8 each), longer leaves (7.2±0.5 cm), and greater leaf width(4.3±0.3 cm) and plant area (344.5±43.2 cm2). Through this study, it was possible to propose an optimal planting substrate for shrubs for multi-layered landscaping.
Kim, Gwangeun;Kim, Seongjun;Kim, Hyun-Jun;Chang, Hanna;Kim, Hyungsub;Park, Yong-Ha;Son, Yowhan
Korean Journal of Environmental Biology
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v.38
no.4
/
pp.733-743
/
2020
We estimated the carbon storage of coal mines reclaimed using Betula platyphylla (BP), Pinus koraiensis (PK), and Pinus spp. (PS, Pinus densiflora, Pinus rigida, and Pinus thunbergii). The carbon storage of tree biomass (TB), forest floor(FF), mineral soil (MS), and the total forest were quantified. Reclaimed sites were located in Gangwon-do, Gyeongsangbuk-do, and Jeollanam-do; reclamation was conducted at various times in each region. The carbon storage (ton C ha-1) in FF (BP: 3.31±0.59, PK: 3.60±0.93, PS: 4.65±0.92), MS (BP: 28.62±2.86, PK: 22.26±5.72, PS: 19.95±3.90), and the total forest(BP: 54.81±7.22, PK: 47.29±8.97, PS: 45.50±6.31) were lower than that of natural forests (NF). The carbon storage in TB was lower in BP (22.57±6.18) compared to NF, while those in PK(21.17±8.76) and PS (20.80±6.40) were higher than in NF. While there were no significant differences in the carbon storage of TB, FF, and the total forest among tree species, results from MS showed a significant difference among species. TB and the total forest carbon storages in all sites increased after reclamation. Soil pH and cation exchange capacity values in BP and PS were lower than in NF. Amounts of labile carbon, available phosphate, and microbial biomass carbon in reclaimed sites were less than half of NF. There are a number of methods that could increase the reclamation efficiency. Applications of lime or organic fertilizers, as well as tillage operations, may improve soil properties in reclaimed coal mines. Additionally, pruning and thinning would increase tree growth thereby increasing carbon storage.
There were five palaces built during the Joseon Period. Gyeongbokgung Palace was the first one, founded in the 4th year of King Taejo (1395), and depending on the historical interpretation, Changdeokgung Palace, Changgyeonggung Palace, Gyeongungung Palace (Deoksugung), and Gyeongdeokgung Palace (Gyeonghuigung) were also built. The palaces represent the best architecture of the time. In addition, the palaces of the Joseon period have been rebuilt several times, so they contain the architectural history of the Joseon period over the last 500 years. In this paper, all the excavations of five palaces in the Joseon Period were surveyed, and the foundations of the buildings were analyzed. In particular, the aim of this paper is to investigate Jeoksim (foundations of buildings under cornerstone) to understand the characteristics of each palace by period. Accordingly, the changes of the construction techniques of the foundations of the palaces were studied. There are a total of 23 types of Jeoksim. All five palaces have a certain type (I~V) of construction technique, thus it was confirmed that there was a certain pattern in the method of constructing the foundations of palace buildings in the Joseon Dynasty. In addition, Jeoksim was mainly built by certain materials and construction methods (I-1) during the 14th to the 17th century, but new types of Jeoksim were built in the palaces starting from the 18th century, during the reign of King Jeongjo. In the 19th century, when King Gojong sat on the throne, the Jeoksim was built in various shapes, materials, and in 22 types of construction methods. Up to now, research on the remains of palaces were mainly conducted on the Gyeongbokgung Palace, so it was not possible to confirm the foundations of 17th-18th century buildings, where reconstruction had stopped after the Imjin War in 1592. However, through this study, it was possible to classify the transition periodsstheir features periods of palace building foundation construction from the 14th to the 20th century by comparing the remains of five palace building sites.
Kim, Kyung Min;Park, Ji Young;Park, Kyoung Un;Sohn, Young Joo;Choi, Youn Young;Han, Mi Seon;Choi, Eun Hwa
Pediatric Infection and Vaccine
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v.28
no.2
/
pp.92-100
/
2021
Purpose: Rapid detection of etiologic organisms is crucial for initiating appropriate therapy in patients with central nervous system (CNS) infection. This study aimed to evaluate the diagnostic value of the BioFire® Meningitis/Encephalitis (ME) panel in detecting etiologic organisms in cerebrospinal fluid (CSF) samples from febrile infants. Methods: CSF samples from infants aged <90 days who were evaluated for fever were collected between January 2016 and July 2019 at the Seoul National University Children's Hospital. We performed BioFire® ME panel testing of CSF samples that had been used for CSF analysis and conventional tests (bacterial culture, Xpert® enterovirus assay, and herpes simplex virus-1 and -2 polymerase chain reaction) and stored at -70℃ until further use. Results: In total, 72 (24 pathogen-identified and 48 pathogen-unidentified) CSF samples were included. Using BioFire® ME panel testing, 41 (85.4%) of the 48 pathogen-unidentified CSF samples yielded negative results and 22 (91.7%) of the 24 pathogen-identified CSF samples yielded the same results (enterovirus in 19, Streptococcus agalactiae in 2, and Streptococcus pneumoniae in 1) as those obtained using the conventional tests, thereby resulting in an overall agreement of 87.5% (63/72). Six of the 7 pathogen-unidentified samples were positive for human parechovirus (HPeV) via BioFire® ME panel testing. Conclusions: Compared with the currently available etiologic tests for CNS infection, BioFire® ME panel testing demonstrated a high agreement score for pathogen-identified samples and enabled HPeV detection in young infants. The clinical utility and cost-effectiveness of BioFire® ME panel testing in children must be evaluated for its wider application.
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