• Mycobiology
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• 제39권4호
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• pp.317-320
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• 2011

Honey production from approximately 1.6 million colonies owned by about 199,000 Korean beekeepers was almost 23,000 metric tons in 2009. Nosema causes significant losses in honey production and the virus decreases population size. We initiated a survey of honey bee colonies on the blooming period of Acacia to determine the prevalence of Nosema and virus in 2011. Most Korean beekeepers have moved from the south to north of Korea to get Acacia nectar for 2 mon. This provided a valuable opportunity to sample bees originating from diverse areas in one location. Twenty hives owned by 18 beekeepers were sampled in this year. Nosema spore counts ranged from zero to 1,710,000 spores per bee. The average number of nosema spores per bee was 580,000. Approximately 95% of the colonies were infected with Nosema, based on the presence of spores in the flowering period of Acacia. This indicates that Nosema is the predominant species affecting honeybee colonies. Also, the seven most important honeybee viruses were investigated by reverse transcription-PCR. Among them, four different viruses were detected in samples. Black queen cell virus was present in all samples. Chronic bee paralysis virus was detected in 10% of samples. Deformed wing virus was present in only 5% of the samples. Prevalence of Sacbrood virus was 15%. However, Cloudy wing virus, Israel acute paralysis virus and kashmir bee virus were not detected in any of samples.

• Journal of architectural history
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• 제4권1호
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• pp.43-70
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• 1995

This paper aims to clarify the historical background and the architectural purpose of the buildings in NakSunJae area to the original state. Through the investigation, the clarified facts are as follows. 1. The relation with the buildings for the Crown Prince in the ChangDok Palace By constructing buildings in the NakSunJae area, the spatial conception of the Royal Palace was changed, that is, buildings for the Crown Prince in the ChangDok Palace disappeared and they became to belong to the ChangGyeong Palace. Moreover, by constructing the NakSunJae and its attached buildings, the area for the Crown Prince shifted to use as a private area for the king. 2. The date and the purpose of the construction The NakSunJae area is consisted of three compounds of building: NakSunJae, SukBokHun and SooKangJae. The NakSunJae was constructed for the king HunChong's private occupancy in 1847 and the SukBokHun for a residence of a royal concubine Kim, in 1847. The SooKangJae was originally built in 1785 in the SooKang Palace where the ex-king took up as his residence after abdicate the throne. Later on, it was repaired as the residence of the Queen SoonWon, king HunChong's grandmother, in commemoration for the 60th anniversary of her birth in 1848. 3. Architectural features of the NakSunJae area at the time of construction First, as the NakSunJae area is surrounded by quite high hills in northeast and by low hills in southwest, it is naturally distinguished from its surroundings and gives a cosy feeling. Second, the NakSunJae area shows very untrammeled style of arrangement in general, because it was constructed as a private occupancy for the king. other buildings are arranged in the latticing orderly, nonetheless, they are free by themselves from a strict form and make themselves an area full of variety. Third, the buildings in the NakSunJae area have a characteristic of naivety of common people's houses, because they were not an official but private place for the king, his concubine and his grandmother. Forth, the ornaments in the NakSunJae area are variously, elegantly and harmoniously patterned with the meaning of good luck. Fifth, back garden in the NakSunJae area was made by taking advantage of sloping hills. The back garden is beautifully configurated by arranging various constituent elements of pavilions, tiered flower beds, chimneys, decorated walls, small doors between walls, stoneworks and trees.

• Journal of architectural history
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• 제29권4호
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• pp.17-26
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• 2020

The planning acumen led by the crown prince stands out during the banquets that were held continually during the reign of Crown Prince Hyomyung around the late Joseon period from 1827 to 1929. If we examine the changes in banquet space during the period that Crown Prince Hyomyung ruled by proxy, the Jagyeongjeon(慈慶殿) in Changgyeonggung Palace, which was built during the time of King Jeongjo was repaired after the in 1827 during the reign of the crown prince and appeared in its changed form in Muja Jinjakin 1828. It is believed that the Jagyeongjeonwas expanded and repaired during the reign of Crown Prince Hyomyung to conduct banquets for important guests. Jagyeongjeon which was repaired during the crown prince's reign, is a space where banquets were continuously held during the three years that he reigned, and we can see that it is an important space for royalty where the authority of King Sunjo, Queen Sunwon, and Crown Prince Hyomyung was reflected. Yeongyeongdan(演慶堂) was a structure built in 1828, which is after the period when the Jagyeongjeonwas changed in 1827, and it is a space that emerged during the reign of the crown prince. Hwanchwijeong(環翠亭), which was constructed during the time of King Seongjong was changed after 1827 during the reign of Crown Prince Hyomyung and appeared in its changed form in Muja Jinjakin 1828. Hwanchwijeongwas the place where the Crown Prince Hyomyung stayed and planned banquets and it was repaired along with Jagyeongjeonin 1827. During his reign, the political intent of the crown prince was reflected not in superficial political spaces but in spaces where banquets were held and accordingly the main spaces for banquets and their related royal palace locations were changed or newly established. You need to briefly explain what this and Muja Jinjak are. New information is not provided in this paragraph. You have already established why the crown prince renovated the banquets and its significance in the first two paragraphs. You could just add "Jagyeongjeon(慈慶殿), Yeongyeongdan(演慶堂), and Hwanchwijeong(環翠亭) in Changgyeonggung Palace during his reign were changed and renovated during the time when the royal banquets of the 19th century were getting established. It was spaces that reflected the royal family and royal authority" to the end of the second paragraph and it would convey your intended meaning.

• Journal of Ginseng Research
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• 제44권2호
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• pp.258-266
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• 2020

Background: Oxidative stress-induced cardiomyocytes apoptosis is a key pathological process in ischemic heart disease. Glutathione reductase (GR) reduces glutathione disulfide to glutathione (GSH) to alleviate oxidative stress. Ginsenoside Rb1 (GRb1) prevents the apoptosis of cardiomyocytes; however, the role of GR in this process is unclear. Therefore, the effects of GRb1 on GR were investigated in this study. Methods: The antiapoptotic effects of GRb1 were evaluated in H9C2 cells by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, annexin V/propidium iodide staining, and Western blotting. The antioxidative effects were measured by a reactive oxygen species assay, and GSH levels and GR activity were examined in the presence and absence of the GR inhibitor 1,3-bis-(2-chloroethyl)-1-nitrosourea. Molecular docking and molecular dynamics simulations were used to investigate the binding of GRb1 to GR. The direct influence of GRb1 on GR was confirmed by recombinant human GR protein. Results: GRb1 pretreatment caused dose-dependent inhibition of tert-butyl hydroperoxide-induced cell apoptosis, at a level comparable to that of the positive control N-acetyl-L-cysteine. The binding energy between GRb1 and GR was positive (-6.426 kcal/mol), and the binding was stable. GRb1 significantl reduced reactive oxygen species production and increased GSH level and GR activity without altering GR protein expression in H9C2 cells. Moreover, GRb1 enhanced the recombinant human GR protein activity in vitro, with a half-maximal effective concentration of ≈2.317 μM. Conversely, 1,3-bis-(2-chloroethyl)-1-nitrosourea co-treatment significantly abolished the GRb1's apoptotic and antioxidative effects of GRb1 in H9C2 cells. Conclusion: GRb1 is a potential natural GR agonist that protects against oxidative stress-induced apoptosis of H9C2 cells.

• Journal of the Korean Society for Library and Information Science
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• 제50권1호
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• pp.395-416
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• 2016

This study analyzes periodic phenomena on publication and characteristics of Buddhist scriptures engraved on woodblock in temples located in Hwanghae Province during the Joseon Dynasty period in bibliographic approach. There are total 85 Buddhist scriptures published in Hwanghae Province, 5 scriptures among them including Yonggamsugyeong appear to be engraved on woodblock only in temples in Hwanghae Province. They, published in 64 printings during the early days of the Joseon Dynasty, occupy 75% of total Buddhist scriptures, and are analyzed to be intensively published with the support of royal family members such as Queen Munjeong in the reign of King Myeongjong. However, as the publication displayed a sharply declining tendency in the late Joseon period after the Japanese invasion, it is understood to be identical with historical fact that the people's livelihood in Hwanghae Province closed to ruin through invasions from Japan and Manchuria. In addition, the analysis on characteristics of these Buddhist scriptures by subject indicates that over 80% of them are generally sacred books and dogmas. In fact, woodblock engraving works in temples emphasize on the duty of an engraver, and many engravers are investigated that they engraved only 2 to 3 Buddhist scriptures in temples located in Hwanghae Province. Doseong and Suyeon can be regarded as remarkable itinerant monks as they were appeared to engrave Buddhist scriptures in not only Hwanghae Province and also other regions by moving from one place to another. This study is expected to be meaningful as a paper that can be used on future studies to compare Buddhist scriptures engraved on woodblock in other regions in North Korea.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• 제30권4호
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• pp.56-69
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• 2012

In this paper, we investigate the original space, the restoration and the construction methods of royal tombs of the Joseon dynasty Sejong who is one of the most respected kings by our people through old document. Yeongneung(英陵) where King Sejong and Queen Soheon is buried has a unique construction method and history of move which is as equally important as human history. It is estimated that there were documents which contains important materials of construction method in the time when the tomb is moved in 1468. Destroyed during Japanese Invasion of Korea in 1592 most of the records of Yeongneung's construction can be found almost no. Fortunately existing literature "朝鮮王朝實錄", "英陵補土所謄錄" written in 1786, "春官通考" written in 1788 and "英陵寧陵補土所謄錄" written in 1900 are used in this paper. As a result of examining these old documents, 1) Definition of tomb construction, 2) Space and layout of tomb, 3) Characteristics of tomb facilities, 4) Scale and contents of tomb construction, 5) Plants of tombs are included in this paper. World Heritage listed cultural facilities should be well preserved and careful consideration is required to use original construction methods during restoration. Accordingly this study conducted by examining old literature. Through this study including Yeongneung's construction characteristics, understanding of Yeongneung construction and restoration in the future is considered.

• 보존과학연구
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• 통권32호
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• pp.53-60
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• 2011

The aim of this study is to investigate the traditional manufacturing technique of lacquering by comparing and analyzing materials used for wooden lacquerware artifacts with focus on the Joseon dynasty Eugye, and to apply the manufacturing technique to the conservation treatment of the lacquerware. artifacts. This study conducted the documentary survey focusing on "Yongjo Jeongsun Queen Consort Garye Dogam Eugye",and "Jeongjo Gukjang Dogam Eugye." The royal lacquering is roughly classified into three categories-scarlet lacquering, quality black lacquering, and terra rosa lacquering- according to materials used for lacquerware. The bean flour was mostly used for under lacquering of the articles which was offered to the king and in case of other articles, bean flour was used mixed with bone ashes. In some cases, burned pine soot was added to under lacquering. Japanese scarlet lacquering was applied by mixing maechil-main coat, in inverted commas- with Japenese scarlet after lacquering jeonchil-base coat, in inverted commas-. In case of Chinese scarlet lacquering, part of terra rosa was used mixed with red clay. For quality black lacquering, basically jeonchil and maechil were used, but sometimes part of burned pine soot was added. In addition, terra rosa lacquering was applied by basically using terra rosa mixed with red clay. Lastly, gloss was given by using perilla oil. It is expected that the traditional materials and technique examined through both documentary and relic research will contribute to advanced result of the conservation treatment of wooden lacqueringware artifacts.

• Korean Journal of Weed Science
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• 제12권2호
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• pp.166-172
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• 1992

The identification on blue-queen algae which were collected from paddy rice fields of the whole nation was carried out in 1991. The blue-green algae identified were 20 species in 5 families including 7 species in the Chroococcaceae. 1 species in the Chamaesiphonaceae. 1 species in the Pleurocapsaceae, 6 species in the Nostocaeae and 5 species in the Oscillatoriaceae. Among the blue-green algae, 6 species in 4 genera including Cylindrospernum, Anabaenopsis, Anabaena and Nostoc were characterized by heterocysts concerning with nitrogen fixation capacity. A concentrated population of Oscillatoria spp. induced soil flakes with blue tint in paddy rice fields. The genera. Spirulina and Oscillatoria, showed their specific motility.

• Korean Journal of Organic Agriculture
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• 제25권1호
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• pp.203-218
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• 2017

The study was initiated at three rice paddy fields of each large-scale area environment-friendly agricultural district, Suncheon and Jangheung in Jeollanam-do, and Okcheon in Chungcheongbuk-do in 2016 to observe growth and nutrients in soil and rice in a season. Jangheung farm had two observed plots; conventional plots and conventional plots additionally fertilizing of 20% T-N with oil-cake. Soil pH, EC, and K concentration on June in Jangheung farm were significantly higher than those values observed in Suncheon and Okcheon farms. Annual rice T-N contents in the Jangheung farm were more than 80 g but decreased in a season. T-N concentration in rice was high in Jangheung farm but the concentrations of P and K were not significantly different among the three farms at harvest. Plant height was as low as 101 cm in Sunchon farm but high in the dry weight (72 g). Leaf SPAD was higher in Jangheung farm than those of other farms. Okcheon farm, with early cultivar 'Milky queen', produced high head rice of 93%, and high unhulled rice and the brown rice per ha. Therefore, the annual production income was as high as 26.7 million won per ha. However, nutrient (T-N + P + K) balance in Okcheon farm with high amount of fertilizer application were as high as 900 kg per ha. On the other hand, nutrient balance in Jangheung farm resulted in less than 300 kg.

• Resources Recycling
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• 제29권1호
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• pp.17-24
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• 2020

In this study, rare earth elements (REE) leaching from a refractory REE ore containing goethite as a major gangue mineral was conducted, introducing a two-stage method of chemical decomposition-acid leaching. At the chemical decomposition step, using one of alkaline agent, NaOH, the ore was decomposed, changing NaOH concentration from 20 to 50 wt% at 10% (w/w) of pulp density and the maximum temperature achieved without boiling at each NaOH concentration. With increasing NaOH concentration, light REE (Ce, La and Nd) and iron were concentrated in the solid phase which is the decomposed product, while aluminum (Al) and phosphorus (P) were removed to the liquid phase, and their concentrations in the solid phase were down to 0.96 and 0.17%, respectively. In addition, through XRD analysis, it was found that the crystallinity of goethite was considerably decreased. At the acid leaching step, the product decomposed by 50 wt% NaOH was leached at 3.0 M HCl and 80 ℃ for 3 hr, then the REE leaching efficiency was above 94% (Ce 80%), and the leaching efficiencies of Al and P were decreased to 12 and 0%, respectively. Therefore, in terms of both REE leaching efficiency and impurity removal, those decomposition and leaching conditions were chosen as optimum processing methods of the investigated material. In terms of REE leaching mechanism, because REE and iron leaching efficiencies showed the positive correlation each other, so it can be concluded that decreasing crystallinity of goethite affect the improvement of REE leaching.