• Journal of Fisheries and Marine Sciences Education
• /
• v.26 no.6
• /
• pp.1366-1372
• /
• 2014

This study was conducted to select the media for the formalin killed vaccine (FKC) production of Vibrio harveyi and its application for olive flounder, Paralichthys olivaceus. For this, we have investigated the immune effects of Vibrio harveyi FKC vaccines grown in 3 different media i.e. Tryptic Soy Broth (TSB), TSB containing 2-2'-dipyridyl (TSB-D), Brain Heart Infusion Broth (BHIB) on the production of agglutinating antibody and protection against Vibrio harveyi in olive flounder. Additionally, a dual vaccine was prepared by combining Streptococcus parauberis vaccine to V. harveyi vaccine and its efficacy was also analyzed with the determination of optimal administration dosage. Consequently, olive flounder immunized with FKC grown in TSB-D showed the same protection with the vaccine grown in BHIB and the optimal dose of the vaccine was 10mg/kg of body weight. Indeed the dual vaccine showed higher agglutination titer and protection than control fish. The optimal dose for dual vaccine was 10mg/kg body weight for each of two vaccines.

• Korean Journal of Soil Science and Fertilizer
• /
• v.22 no.4
• /
• pp.265-270
• /
• 1989

Soil properties for the limestone-derived soil were examined to relate soil formation to stratigraphy of parent materials and hillslope positions in Bangjeol Ri, Yeongweol Eup, Gangweon Do. Pyeongchang, Anmi, Yulgog and Mungyeong series were described for topographic positions such as shoulder position, footslope, terrace and local bottom associated with toposequence where the landscape consisted of gently rolling hillslopes and nearly level plains. 1. Pyeongchang, Anmi, Yulgog and Mungyeong series had the standard hue of the 2.5YR, 5YR, 10YR and 2.5Y, respectively. Thus, color sequence of soil could be related to hillslope positions on the landscape. 2. With ascending slope toward summit, the clay content increased while silt content decreased 3. Silt/Clay ratios ranged from 0.27 to 3.76 and it was increased with descending to bottom. It, also, appeared that maturity of soil was higher at summit position than at bottom. 4. Soils developed in limestone were neutral in soil reaction and very low in available $P_2O_5$. OM, available $SiO_2$, CEC, and active Fe in soils seemed to be increased with ascending to summit position.

• Journal of Sericultural and Entomological Science
• /
• v.45 no.2
• /
• pp.112-115
• /
• 2003

NIAST has developed the artificial cultivation technique of entomopathogenic fungus, Isaria sinclairii by using the silkworm. NIAST is planning to provide the silkworm farmers the guidance of the technique. Screening of pharmacologically active principles of I. sinclairii is needed to register the fungal breeding, attain the approval of food materials, and ultimately position the fungus as a high value-added product. The result of investigating the characteristics of Isaria sinclairii was showed that conidia were irregularly long oval-shaped and measured 6.33$\times$3.33 $\mu\textrm{m}$ in average The optimal condition of cultivating hyphae was pH 5.0 in acidity and 21- $25^{\circ}C$ in temperature. And the best condition of producing conidia was pH 6.0 in acidity and 16-$20^{\circ}C$ in temperature.

• Journal of Sericultural and Entomological Science
• /
• v.45 no.2
• /
• pp.108-111
• /
• 2003

A infectious fungus (J131) recently isolated from artificial cultivation farms of Paecilomyces tenuipes is known to cause a great yield loss and deterioration of products. In this study, its occurrence and characterization were made. The isolate (J131) was identified as Paecilomyces farinosus (Holm ex S. F. Gray) Brown ＆ Smith. Colonies of the isolate on PDA grew moderately fast, attaining a diameter of 19mm within 14 days at 24${\pm}$1$^{\circ}C$. Vegetative hyphae are smooth-walled and hyaline. Conidiophores mainly arose from the submerged mycelium, usually measuring 1.3-1.5$\mu\textrm{m}$ wide and consisted of verticillate branches with whorls of 2 to 4 phialides. Phialides of 3.8-5.8${\times}$1.5-1.8 $\mu\textrm{m}$, with a swollen basal portion tapered into a distinct neck of about 0.6-0.8 $\mu\textrm{m}$ wide. Conidia arisen from the phialides, were ellipsoidal to fusiform, smooth-walled, hyaline, 1.8-2.4${\times}$1.1-1.4$\mu\textrm{m}$. .When silkworm larvae were injected with concentration of 1${\times}$10$\^$8/ conidia/$m\ell$ of infectious fungus J131, infection rate was 41.3％ and synnemata formation rate was 23.6％. Black spots were appeared on the surface of silkworm larvae in 5-9 days after injection. The surface of larvae was covered with hyphae which were gradually turned into yellow from white color during the incubation period of 3-4 days. 1 to several 4-6mm long synnemata of yellow or orange color were formed on the surface. The matured synnemata were ramified from its end and produced much conidia of white color.

• Economic and Environmental Geology
• /
• v.54 no.5
• /
• pp.573-580
• /
• 2021

This study analyzed the induced effects of the aggregate and stone sectors using the industry association table. First, the added value of the aggregate and stone sectors was summarized, and then the intermediate input structure and induced effect were analyzed. In terms of value-added structure, aggregate and stone showed a higher employee remuneration rate compared to the manufacturing industry, and a higher rate of operating surplus compared to other mining industries. The intermediate input structure summarizes the sector using aggregate and stone products as intermediate inputs and their input ratio. The proportion of the intermediate element input structure was confirmed. In addition, the main input sectors of ready-mixed concrete, the largest consumer of aggregate and stone, are also summarized. The production-inducing effect of aggregate and stone showed a higher influence coefficient than the sensitivity coefficient, confirming that they had a relatively large rear chain effect. The production inducement effect was reviewed by reconstructing the industry association table, and it was found to show a relative superiority in the influence coefficient, similar to the results derived according to the provisional classification of the Bank of Korea.

• Journal of Digital Convergence
• /
• v.19 no.12
• /
• pp.541-548
• /
• 2021

This study analyzed the path through which elderly discrimination experience, sense of loss, and depression lead to suicidal ideation by verifying the influence of elderly discrimination experience on suicidal ideation and the mediating effect sense of loss and depression. The subjects of the study were a 1:1 in-depth interview survey of 400 elderly people aged 65 or older using stratified sampling methods by region and type of 31 city, county, and district the elderly welfare welfare centers(10 locations) in Gyeonggi-do. As a result, a total of 360 samples were finally analyzed. It was verified through frequency analysis, descriptive statistics analysis, correlation analysis, structural equation and bootstrapping analysis methods using SPSS 25.0 and AMOS 23.0. As a result of the study, first, it was found that the more the elderly experienced discrimination, the higher the suicidal ideation. Second, the effect of sense of loss was partially mediated on the effect of discrimination experience on suicidal ideation in the elderly. Third, the feeling of depression was found to play a partial mediating role between the experience of discrimination among the elderly and suicidal ideation. Based on the results of this study, policy and practical suggestions were made to alleviate the suicidal ideation of experiences of discrimination against the elderly and sense of loss and depression to prevent suicide among the elderly.

• Journal of Technology Innovation
• /
• v.28 no.4
• /
• pp.97-126
• /
• 2020

This study evaluated its potentials by quantitatively analyzing the national economic impact of the smart home-related industry, which is attracting attention as a core industry of the 4th industrial revolution. For the analysis, the smart home-related industries were classified into manufacturing and service industries through a literature review of the previous studies. Using the 2018 input-output table, this paper analyzed linkage effects between industries as well as spillover effects in the production, value-added, employment and job. As a result, the smart home manufacturing and service sectors showed a higher spillover effect in value-added than other industries in each industrial field. In the smart home industry, the spillover effects of manufacturing sector to service sector are larger than those of service sector to manufacturing sector. Moreover, it was confirmed that smart home industry was highly related to not only the technology-intensive industry, but also the service sector for smart cities, smart cars, Fin-tech, and etc. On the other hand, the smart home manufacturing sector is a final demanding industry with relatively higher backward linkage effect than forward linkage effect. In the smart home service sector, the forward linkage effect was relatively high compared with the backward linkage effect, indicating that it was an industry with a high supply function to other industries.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.48 no.3
• /
• pp.291-301
• /
• 2021

The aim of this study is to compare the properties of odontoblast gene of early passage cells and late passage cells derived from impacted maxillary supernumerary teeth. Impacted supernumerary teeth with maxilla were extracted from 12 patients (8 males, 4 females) between 6 - 9 years old without medical history. Real-time polymerase chain reaction (PCR) was conducted to compare characterization of odontoblast cell in the 3rd and 10th passage, and between with bone inducing additive group and without additive group. Genes for odontoblasts characteristics are osteonectin (ONT), alkaline phosphatase (ALP), osteocalcin (OCN), dentin matrix protein 1 (DMP-1) and dentin sialophosphoprotein (DSPP). The level of gene expression was in a decreasing order of ONT, ALP, OCN, DMP-1 and DSPP in the 3rd passage, and in decreasing order of ONT, DMP-1, OCN, ALP, and DSPP in the 10th passage in the undifferentiation and differentiation group. The order of ONT, DMP-1, and OCN did not changed. ALP and DMP-1 were switched in order. ALP and DMP-1 may be used as important markers for differentiating between the 3rd passage and 10th passage cells. Considering that supernumerary tooth was extracted young age and the time required to cultured 10th passage was short, supernumerary tooth can be considered a useful donor site of dental pulp stem cells.

• The Journal of the Korea Contents Association
• /
• v.21 no.9
• /
• pp.125-135
• /
• 2021

Due to the lack of national consensus on the importance and value of the character industry and the lack of recognition of value as a national strategic industry, the development of the character industry is experiencing great difficulties. The purpose of this study is to analyze the economic effects of character industry in China to help establish policies and strategies for the character industry in the future. To this end, this study utilized the China 2017 Industrial Association Table. The analysis results are as follows. China's character industry has a lower production inducement effect than other industries with a column total of 3.45514, and a row total of 1.30015. This shows that China's character industry is still being produced by small and medium-sized companies with a low equity ratio. Second, in the character industry, the index of the sensitivity of dispersion representing the forward linkage effect is 0.01426 and the impact factor is 0.03790, which are all less than 1. Therefore, it can be said to be the final demand manufacturing type.Third, in China character industry's income induction is 0.47690 and the production tax induction effect is -0.04912. It can be seen that the character industry has less income induction and tax burden generated every time the final demand increases by one unit in the entire industry than in other industries.Despite the quantitative growth of the character industry in China, the impact on other industries is low and it is not playing a role as an income-generating industry. Structural improvement is needed for the qualitative development of China's character industry.

• Journal of the Korean Applied Science and Technology
• /
• v.38 no.2
• /
• pp.476-487
• /
• 2021

To prepare acrylic resin coatings containing 70% of solids, we used n-butyl methacrylate(BMA), methyl methacrylate(MMA), 2-hydroxyethyl methacrylate(2-HEMA), and acetoacetoxyethyl acrylate(AAEA), caprolactone acrylate(CLA) as raw materials, the glass transition temperature(T_g) of acrylic copolymer was adjusted around 50 ℃. The viscosity and molecular weight of the acrylic resins was increased with increasing OH values. Di-tert-amyl peroxide was found to be the suitable initiator to get high-solids acrylic resins. The optimum reaction conditions found in the study are 5 wt% of initiator, 4 wt% of chain transfer agent, 4 hrs of dropping time, and 140 ℃ of reaction temperature. The structure of the synthesized resins were characterized by FT-IR and ¹H-NMR spectroscopy. Number average molecular weight of 1900~2600 and molecular wight distribution of 1.4~2.1 were obtained. Crosslinked acrylic urethane clear coatings were obtained by curing reaction between the synthesized acrylic resins and hexamethylene diisocyanate trimer(Desmodur N-3300), the equivalent ratio of NCO/OH was 1.2/1.0. The physical properties from the following studies were carried out: viscosity(Zahn cup #2), adhesion, drying time, pot-life, pensil hardness, and 60° specular gloss. Various properties of the acrylic urethane clear coatings were also evaluated on the coating specimens. Adhesion property to a substrate, drying time, pot-life, pencil hardness, and 60° specular gloss of prepared paint showed quite good properties. Futhermore, prepared paint containing 10% of CLA showed quite good properties for adhesion, low viscosity and high hardness.