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Synthetic β- Wollastonite, as a parent raw material, which reported before at "The Studies on Wollastonite (1) -Synthesis "and the several clays, as a binder, were made into specimens. Then, tested and detected carefully on the electric properties with general properties. The results are given below: 1. As the binder, domestic Changdong clay shows increasing phenomena at dielectric constant (ε). Under the several choiced firing conditions, 20% the composition of each clay has commonly higher value of dielectric constant compare with other comositions and then e value is 7.43 at the firing condition of 1100℃. maturing temperature, 1 hr soaking time. 2. The ceramics including Changdong clay as the binder have the same varialbe decreasing tendency in order 15%, 20%, 30% and 40% series the composition at the firing condition of 1100℃. maturing temperature, whether the soaking time is long orshort. 3. When maximum value of dielectric constant is appeared at the maturing temperature of 1000℃, 1050℃, and 1100℃, the soaking time at the each maturing temperature decreases per an hour according to the maturing temperature which increased per 50℃, where specimen contain 20% Changdong clay. 4. To the Wollastonite ceramics, dielectric constant and dissipation factor (tanδ) at the frequency around 106 Hz vary sensible). 5. To the Wollastonite ceramics, dielectric constant and dissipation factor are not varied according to the temperature gradient applied at measurement.
Current status and prospect of sericultural industry in Gyeonsangbukdo were examined through history and business of institute, sericultural status of Gyeongsangbukdo, purchasing results, and prospects of Gyeongsangbukdo. Silkworm & Insect Business Center was established in 1911 as Sericultural training institute. Original silkworm 400 case, and Nuedongchunghacho inoculant 100 box will be spreaded. Sericultural farmer is 339 and 41.5 percent on the whole country in 2016. Ten thousand kilogram of cocoon was purchased by institute in 2016. Farm income was increased to 13.7 million won and purchased cocoon 9,875 kg in 2017. To activate sericulture Gyeongsangbukdo will support Hanbok Institute in 2019 and make sericultural complex.
The present research reports the thermal degradation behavior of aluminum-doped zinc-oxide (AZO) thin films coated on glass substrates by using a sol-gel method. The thermal degradation behavior was investigated through changes in the resistivity of the thermally degraded AZO films, which were compared with that of normal one. The thermal degradation of AZO lms is discussed based on the results of scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diraction (XRD) and Hall effect measurements. The present research reports the thermal degradation behavior of aluminum-doped zinc-oxide (AZO) thin films coated on glass substrates by using a sol-gel method. The thermal degradation behavior was investigated through changes in the resistivity of the thermally degraded AZO films, which were compared with that of normal one. The thermal degradation of AZO lms is discussed based on the results of scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diraction (XRD) and Hall effect measurements.
Aim : To investigate whether leukocyte infiltration during neurogenic inflammation in the pulp is regulated by neuropeptides via inducing the release of proinflammatory chemokines interleukin-8 (IL-8) from human dental pulp , Methods : Primary human dental pulp tissue explants were stimulated with substance P (SP) , IL-8 produced in pulp explants was examined by immuno- histochemistry. Results : After the pulp tissues explants were cultured for 12 h and 24 h in the medium without FBS, IL-8 were expressed only around the cell rich zone and blood vessels in the pulp tissues , SP(10-4 M) induced lL-8 expression in the pulp tissue explants after 24 h of SP stimulation, while TNF-a(20ng/ml) did not induce the IL-8 in the pulp tissue. The stronger lL-8 staining was detected in the pulp tissue explants after 6 and 12 h of TNF-a(20ng/mI) stimulation, while only dead cells were revealed in the pulp tissue after 24 h of TNF-a(20ng/mI) stimulation. Conc1usions : SP significantly induces IL-8 expression in human dental pulp suggesting an important role of SP in recruiting neutrophils in localized pulp tissue , SP may have positive relation with the inflammation of the human dental pulp tissues.
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To develop a live vaccine candidate using an attenuated strain of Salmonella Typhimurium (ST), biochemical properties, plasmid profile, PFGE patterns and pathogenic analysis of the ST isolate were carried out after sequential passage of the ST isolate in porcine neutrophils. By the passage, the ability of the neutrophil-adapted isolate to utilize d-xylose was lost, while the ability of the strain to ferment trehalose was delayed after 2 or more days of the culture. Also, changes including deletion of the gene fragments were observed in PFGE analysis of the neutrophil-adapted isolates. Two plasmids, 105kb and 50kb, were cured in the strain passaged over 15 times in porcine neutrophils. The 50% of lethal dose (LD50) of the parent strain was changed from 1 × 105 LD50 to 6 × 106 LD50 by the passage in intraperitoneal injection of the strains into mice. These results suggested that bacterial genotypic and phenotypic responses might be globally altered depending on the inside environment of neutrophils.
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The financial crisis and the advent of knowledge-based economy have facilitated the coming of HRD Age in Korea. In the meantime, HRD policies have been made by government. Especially National HRD was newly coined and were even debated in AHRD Conference. This study attempts to identify the characteristics of the HRD policies, derive the new directions of the project and trigger the academic debate about the scope of HRD and the role of nation.
The adherence of the wet-process cast iron enamels, the resistance of the thermal shocking, the blistering phenomena and the structure of base metal with a microscope have been studied in order to examine the effects of various coating conditions of glossy ground coat and the type of carbon contained in the base metal for manufacturing the ceramic coating on cast iron. This study showed that the ground coat played a main role more in forbidding the blistering than increasing the adherence between the base metal and the cover coat and that the adherence was affected strongly by the composition of the base metal, especially by the ratio of combined carbon and free carbon.
The identification and validation of the targets of biologically active molecules is an important step in the field of chemical biology. While recent advances in proteomic and genomic technology have accelerated this identification process, the discovery of small molecule targets remains the most challenging step. A general method for the identification of these small molecule targets has not yet been established. To overcome the difficulty in target identification, new technology derived from the fields of genomics, proteomics, and bioinformatics has been developed. To date, pull-down methods using small molecules immobilized on a solid support followed by mass spectrometry have been the most successful approach. Here, we discuss current procedures for target identification. We also review the most recent target identification approaches and present several examples that illustrate advanced target identification technology.
This study aims to explore measures to help establish a management direction and policies of local public libraries based on local residents' needs for library services based on the community characteristics. To that end, a community survey was conducted focusing on eight urbans (gus) and two rural districts (guns) in Incheon Metropolitan City. The districts were categorized into three types, original urban center (Area 1), new urban center (Area 2), and urban-rural complex (Area 3). The residents in each type were analyzed in terms of library use, awareness, needs, and satisfaction. In terms of library use, awareness, and satisfaction, we identified differences among the area types. This paper suggested management directions of local public libraries based on the community characteristics. 본 연구는 지역사회 특성에 따른 지역 주민의 도서관 요구를 파악하여 지역 공공도서관의 운영방향과 정책을 수립하기 위한 방안 모색을 목적으로 인천광역시 8개 구와 2개 군의 기초자치단체를 중심으로 지역사회 조사를 실시하였고, 지역 특성에 따라 지역1(원도심 중심), 지역2(신도심 중심), 지역3(도․농 복합 지역), 3개의 지역 유형으로 나누어 그 지역에 속해 있는 공공도서관 이용자 300명을 대상으로 설문조사를 실시하여 도서관 이용행태, 도서관에 대한 인식 및 요구, 지역사회 평가, 서비스 만족도 등을 분석하였다. 그 결과 도서관 이용행태, 도서관에 대한 인식, 도서관 서비스에 대한 만족도에서 지역유형에 따라 부분적인 차이를 보였으며 그 결과를 토대로 지역 유형에 따른 공공도서관의 운영 방안에 대해 제안하였다.