• Journal of Plant Biology
• /
• v.22 no.1_2
• /
• pp.21-27
• /
• 1979

Sandy loam plots of pH 5.5, which was created by the reclamation of highlands in Yongin county, Kyeonggi province, was selected for the present experimental study. Sugar beet was cultured in these plots by treating them with calcium hydroxide and 3 replications to maintain pH 5.5, 6.4, 6.8, 7.2, and 7.6, respectively. The growth and yield of sugar beet were investigated and the results obtained showed a great deal of boron deficiency. The growth in its early stage was favorable in high pH plots, while no significant difference was observed in sugar content, root weight and sugar production at the time of harvest in each treated plot. The tendency of sugar accumulation appeared to be identical in terms of pattern in each treated plot; i.e. sugar was accumulated until early September but declined momentarily from the middle of September and then the sugar accumulation was resumed from the middle of October. The number of individuals in boron deficiency was larger in high pH plots and the condition of such boron deficiency was also severe. The result of analysis of boron contained in plant body revealed that the boron content of individuals caused boron deficiency by water culture and that occurred in the plots was small alike. The appearance of boron deficiency is characterized by the emergence of black stripes on the surface of the basal part of petiole, severe necrosis of young leaves in the area of growing point and severe wrinkles. Therefore it is felt necessary to pay particular attention to boron deficiency in the culture of sugar beet in our country.

• Mycobiology
• /
• v.38 no.2
• /
• pp.133-136
• /
• 2010

Stromatal fruiting bodies of Cordyceps cardinalis were successfully produced in cereals. Brown rice, German millet and standard millet produced the longest-length of stromata, followed by Chinese pearl barley, Indian millet, black rice and standard barley. Oatmeal produced the shortest-length of fruiting bodies. Supplementation of pupa and larva to the grains resulted in a slightly enhanced production of fruiting bodies; pupa showing better production than larva. 50~60 g of brown rice and 10~20 g of pupa mixed with 50~60 mL of water in 1,000 mL polypropylene (PP) bottle was found to be optimum for fruiting body production. Liquid inoculation of 15~20 mL per PP bottle produced best fruiting bodies. The optimal temperature for the formation of fruiting bodies was $25^{\circ}C$, under conditions of continuous light. Few fruiting bodies were produced under the condition of complete darkness, and the fresh weight was considerable low, compared to that of light condition.

• Korean Chemical Engineering Research
• /
• v.56 no.2
• /
• pp.143-150
• /
• 2018

Oil-in-water emulsion was prepared using cinnamoyl surfactants as emulsifiers. Cinnamoyl surfactants used in the present study were polyoxyethylene (20) sorbitan monolaurate-cinnamic acid conjugate (TW20CA), polyoxyethylene (20) cetyl ether-cinnamic acid conjugate (CE20CA), and polyoxyethylene(20) oleyl ether-cinnamic acid conjugate (OE20CA). The emulsion stabilized with TW20CA was the most stable, possibly because the polyoxyethylene segment of TW20CA would sterically stabilize the oil droplets effectively. In vivo UV protecting efficacy of surfactant and emulsion was investigated by determining the minimum amount of UV light (MAUL) to induce a black point on the back of hairless mice (HRM2). The mean MAUL of PARSOL, OE20CA, and emulsion stabilized with TW20CA was $1046.5mJ/cm^2$, $1163mJ/cm^2$, and $1308.5mJ/cm^2$, respectively. The high UV-protecting efficacy of the emulsion could be ascribed to not only the UV-absorbing property of cinnamoyl group but also the UV-scattering property of the oil droplets.

• Journal of the Korean Society of Food Culture
• /
• v.4 no.4
• /
• pp.357-368
• /
• 1989

In this study, the kinds of Dog Meat Cooking, side dishes, ingredients, seasonings and recipes were surveyed in 21 Dog Meat Cooking restaurants in Korea from July to August of 1989. 1. Actually, there were four Dog Meat Cooking recipe. Tang (soup:湯) has been served in 20 (95.2%) restaurants and Sukyuk(boiled in water:熟肉) in 19(90.5%) ones. Junkol(boiling vegetables and meat with seasoning:煎骨) and Muchim(sauteed with seasoning:무침) has been done in 16(76.2%) and 10(47.6%) restaurants, respectively. 2. According to the frequencies, the main seasonings when served were roasted perillar powder (95.2%), soybean paste (95.2%), vinegar(81.0%), Dadegi (mixed much red pepper powder, minced ginger, minced garlic, minced onion and black pepper powder, 66.7%), pepper(61.9%), salt(61.9%), salt(61.9%), minced ginger(57.1%), minced garlic(57.1%) and prepared mustard(38.1%). 3. The number of side dishes were 26. Among vegetables, green pepper(90.5%), sliced garlic(81.0%) were served. Chinese cabbage(61.9%) and Kagtuki(42.9%) out of Kimchi and leek salad(28.6%) were also served. 4. The total 17 ingredients were used in Dog Meat Cooking. The major one were white onion (100%), perillar leaf(72.2%), leek(66.6%) and parsley(47.2%).

• Journal of the Korean Society for Heat Treatment
• /
• v.25 no.2
• /
• pp.65-73
• /
• 2012

The Gas Diffusion Layer (GDL) of fuel cell, are required to provide both delivery of reactant gases to the catalyst layer and removal of water in either vapor or liquid form in typical PEMFCs. In this study, the fabrication of GDL containing Micro Porous Layer (MPL) made of the slurry of PVDF mixed with carbon black is investigated in detail. Physical properties of GDL containing MPL, such as electrical resistance, gas permeability and microstructure were examined, and the performance of the cell using developed GDL with MPL was evaluated. The results show that MPL with PVDF binder demonstrated uniformly distributed microstructure without large cracks and pores, which resulted in better electrical conductivity. The fuel cell performance test demonstrates that the developed GDL with MPL has a great potential due to enhanced mass transport property due to its porous structure and small pore size.

• Journal of Microbiology and Biotechnology
• /
• v.29 no.9
• /
• pp.1412-1423
• /
• 2019

The filamentous fungus Aspergillus tubingensis that belongs to the black Aspergillus section has the capacity to produce high-value metabolites, for instance, naphtho-gamma-pyrones (NGPs). For these fungal secondary metabolites, numerous biological properties of industrial interest have been demonstrated, such as antimicrobial, antioxidant and anti-cancer capacities. It has been observed that production of these secondary metabolites is linked with fungal sporulation. The aim of this research was to apply osmotic and oxidative environmental stresses to trigger the production of NGPs in liquid cultures with CYB (Czapek Dox Broth). In addition, numerous parameters were tested during the experiments, such as pH value, incubation time, container geometry, and static and agitation conditions. Results demonstrate that the produced amount of NGPs can be enhanced by decreasing the water activity ($a_w$) or by adding an oxidative stress factor. In conclusion, this study can contribute to our knowledge regarding A. tubingensis to present an effective method to increase NGP production, which may support the development of current industrial processes.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.22 no.4
• /
• pp.127-142
• /
• 2020

This study compared the domestic and international commercial design patterns and domestic consumer preferences for wetsuit designs to develop a user-centered wetsuit design. An analysis of the domestic and international design elements for 1,802 wetsuits sold online over the past three years showed that the most frequent shapes, dominant colors, and patterns were the same, as consumers tended to buy full suits that were black or had geometric patterns. Dominant colors and assort/accent colors were different from the survey results. Men's wetsuits used fewer colors and patterns than women's suits. Domestic wetsuits used fewer patterns than those sold abroad; in addition, colors were applied differently. A consumer preference survey conducted on 213 male and female consumers in their 20s and their 50s in Korea indicated that 53.5% of respondents were the most affected by the shape when choosing a wetsuit design. The preferred color scheme was two colors, with a vivid tone used as an accent color. The factor analysis results on wetsuit design preference uncovered the six factors: individuality, display, function, acceptance, imitation, and comparison. An independent sample t-test also showed that men perceive individuality, imitations, and comparison factors higher than women.

• International Journal of Computer Science & Network Security
• /
• v.22 no.2
• /
• pp.362-368
• /
• 2022

The main purpose of the article is to study the key aspects of the use of modern technologies to ensure economic security in the context of achieving high efficiency of public administration.The economic security of the country is a multi-level system, the structure of which is determined by the peculiarities of the structure and key development priorities both in the regional aspect and nationally. The fundamental role of economic security is realized through a set of goals and objectives that are achieved in the process of ensuring it, among the main ones is the effective, dynamic and progressive development of the economy, which is impossible without the development of innovations. The essence of ensuring economic security from the standpoint of innovative development lies in the development of innovations that can increase the level of competitiveness of the state-level economic system, which necessitated an analysis of the conditions and dynamics of innovation development. As a result of the study, the basic aspects of the implementation of modern technologies were analyzed in the context of achieving high efficiency in public administration.

• Geomechanics and Engineering
• /
• v.32 no.3
• /
• pp.271-291
• /
• 2023

Settlement estimation in cohesion materials is a crucial topic to tackle because of the complexity of the cohesion soil texture, which could be solved roughly by substituted solutions. The goal of this research was to implement recently developed machine learning features as effective methods to predict settlement (S_m) of shallow foundations over cohesion soil properties. These models include hybridized support vector regression (SVR), random forests (RF), and coot optimization algorithm (COM), and black widow optimization algorithm (BWOA). The results indicate that all created systems accurately simulated the S_m, with an R² of better than 0.979 and 0.9765 for the train and test data phases, respectively. This indicates extraordinary efficiency and a good correlation between the experimental and simulated S_m. The model's results outperformed those of ANFIS - PSO, and COM - RF findings were much outstanding to those of the literature. By analyzing established designs utilizing different analysis aspects, such as various error criteria, Taylor diagrams, uncertainty analyses, and error distribution, it was feasible to arrive at the final result that the recommended COM - RF was the outperformed approach in the forecasting process of S_m of shallow foundation, while other techniques were also reliable.

• Journal of the Korean Society of Industry Convergence
• /
• v.26 no.3
• /
• pp.509-515
• /
• 2023

This study examind the product quality characteristics and industrial application of arrowroot powder added Yanggaeng before its industrial application. Several preliminary experiments were conducted by applying manufacturing conditions and varying the amount of arrowroot powder(1%, 2%, 3%, 4%) added to produce Yanggaeng recipes that can be sold commercially. The moisture content of the produce Yanggaeng was low due to the manufacturing standards, but it showed a significant increase with an increase in the ratio, which was similar to the results of other studies on Yanggaeng. The solubility, particale size distribution, and pH also showed a significant increasing trend. The hardness of arrowroot powder added Yanggaeng decreased with an increase in the amount of arrowroot powder, while springiness, gumminess, and chewiness increased with the addition of arrowroot powder. In terms of color, arrowroot powder showed a dark color, which was well suited to white bean paste and could also be used with black bean paste without any problem. These results were due to the manufacturing ratio being adjusted to meet commercial sales standards, resulting in a lower amount of water being used, and the characteristics of arrowroot powder being applied as they were.