• Journal of the Korean Society of Food Culture
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• v.21 no.2
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• pp.171-178
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• 2006

Tarakjuk with different amylose content was made up using roasted rice flours that consisted of the highest enzyme-resistant starch (RS), while differential scanning calorimetry (DSC) was also utilized to measure the gelatinization temperature of these roasted rice flours in order to establish cooking temperature of tarakjuk. The following qualities of tarakjuk with different amylose content were studied: color, viscosity, spreadability, starch fractions involving total starch (TS), rapidly digestible starch (RDS), slowly digestible starch (SDS) and RS, in vitro starch digestibility (IVSD) and sensory properties. During experimentation, it was found that as the amylose content of the rice flour decreased, the L value of tarakjuk decreased, whereas a value increased significantly (p<0.05). Also, while viscosity showed to increase significantly (p<0.05), on the opposite end, the property of spreadability decreased. TS ranged from $15.95{\sim}17.31%$, RDS $9.36{\sim}10.16%$, SDS $5.46{\sim}6.91%$ and RS $0.33{\sim}1.07%$, on a dry basis. Although the amylose content of rice flours decreased, IVSD increased, however showing no significant difference. When testing the sensory properties of tarakjuk, color and viscosity increased, whereas clumpiness decreased. Ilpum tarakjuk showed the highest score for nutty taste and overall acceptance levels. In fact a high correlation was shown between nutty taste and overall acceptance level (p<0.01), which leads one to believe that nutty taste is a prime factor that greatly influences overall acceptance. Furthermore, viscosity was positively correlated with both a and b values, however negatively correlated with L value (p<0.05). Moreover, roasted nutty taste and overall acceptance were positively correlated with a value (p<0.05), respectively. In conclusion, the above results suggest that tarakjuk could be made by choosing the appropriate rice flour based on the nutritional or sensory purpose.

• Preventive Nutrition and Food Science
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• v.3 no.3
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• pp.295-301
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• 1998

Potential applications of irradiation technology inpostharvest handling of agricultural products have been documented over the past five decades. The biological effects of ionizing radiation on food were demonstrated to have the potential both of reducing the storage losses by controlling spoilage microoraganisms, insects, to have the potential both of reducing the storge losses by controlling spoiliage microorganisms, insects, sprouting and ripening, and of improving the hygienic quality of raw and processed products. Food irradiation is recognized as a physical and cold process using gamma-rays from radioisotope sources and electron-beam from the accelerator. As one of the technologies or techniques for preserving and improving the safety of food, irradiated technology has been approved in some 40 countries for more than 200 individeual items of foods and of these about 30 countries including Korea are commerically utilizing this technology. Although limited quantities of irradiated foods are available in the market now, the proper uses of this renewed technology will offer great possibilities not only for increasing the availability of postharvest agricultural products, thereby contributing to price stabilization in the off-season, but also for reducing reliance on chemicals used for sanitary and quarantine requirements. This paper deals with biological actions of ionizing radiation and its potential applications in the agri-food industry from the international point of view.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2004.05a
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• pp.100-105
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• 2004

Recently, the assisted living facilities for the elderly are increasing due to the facts, such as rapid increasing ratio of old people, rising incomes and the changing concepts towards family relationship. For the elderly, there is a need to re-examine how environment can incorporate design concepts which enhance accessibility and adaptability. For this survey each seven cases in Korean & American facilities were examined and also 120 copies of a questionnaire for the elderly who are above 60 were analysed. This survey revealed that; 1. The consciousness of the majority elderly was favorably aware of the assisted living facilities for the elderly by a social phenomenon. 2. At a response of the scale for the living unit, majority subjects preferred to live in size of 16${\sim}$20 pyung. 3. Subjects preferred not only clean and modern atmosphere, but also medical area and fitness room, design considerations for these points are needed. 4. Enough spaces for their hobbies and social activities, which are important factors for smooth understanding, communication and psychological remedy effect for the elderly should be provided in the facilities for the elderly. 5.Korean facilities were lack of accessibility, safety and adaptability, thus it is very important to select the suitable materials for the safety and lighting plans with regard to their physical and mental qualities.

• Environmental Engineering Research
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• v.11 no.5
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• pp.266-276
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• 2006

Commonly, the flocculant is dissolved in process or recycle water in industrial plant which has many ionic materials. Therefore, the polymer degradation in aqueous solution by chemical, mechanical or bacteriological may occur, sometimes rapidly. Even if the same flocculant is dissolved, the flocculation characteristics and the properties of dissolving polymer varied with the kind of dissolving water. In this study, we try to estimate the interaction between flocculants and ionic materials in dissolving water using self inversing emulsion polymer; polyacrylamide-co-trimethyl ammonium ethyl acrylate chloride flocculants which have varying molecular weights and structures at a several conditions. The polymeric flocculant is dissolved in artificial dissolving water with Potassium Chloride (PC), Calcium Chloride anhydrous (CC), Potassium Hydroxide (PH), Sodium Chloride (SC), Sodium Bromate (SB) and Iron (II) Sulfate Heptahydrate (IS) as ionic sources. Experimental results indicate that the cationic and anionic ions in dissolving water induce the hydrolysis, degradation of cationic functional group and uncoiling of polymeric flocculants, therefore, the flocculation efficiency decreased by undesired polymer. According that result, it is important to estimate not only its structures and physical properties but also the qualities of dissolving water to optimize the efficiency.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.1
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• pp.132-138
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• 2007

Carbon nanotubes (CNTs) arc grown on Ni catalysts employing an inductively-coupled plasma chemical vapor deposition (ICP-CVD) method. The structural and field-emissive properties of the CNTs grown are characterized in terms of the substrate-bias applied. Characterization using the various techniques, such as field-omission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Auger spectroscopy (AES), and Raman spectroscopy, shows that the structural properties of the CNTs, including their physical dimensions and crystal qualities, as well as the nature of vertical growth, are strongly dependent upon the application of substrate bias during CNT growth. It is for the first time observed that the provailing growth mechanism of CNTs, which is either due to tip-driven growth or based-on-catalyst growth, may be influenced by substrate biasing. It is also seen that negatively substrate-biasing would promote the vertical-alignment of the CNTs grown, compared to positively substrate-biasing. However, the CNTs grown under the positively-biased condition display a higher electron-emission capability than those grown under the negatively-biased condition or without any bias applied.

• Korean Journal of Human Ecology
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• v.21 no.1
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• pp.113-128
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• 2012

The purpose of this study was to identify key components in developing educational programs designed to enhance pre-service teachers' professionalism. Key program characteristics identified and implemented through this study are as follows: First, programs should provide opportunities for trainees to reflect on goal identification and setting goals as professional teachers. Second, programs should emphasize the relationship between the pre-service teachers' personal qualities and professional development. Third, programs should include and integrated and holistic approach to integrating content and teaching methodology. Fourth, the program's educational content should unfold in a gradual and sequential manner. Fifth, the program should support a strong relationship between senior teachers and juniors pre-service teachers. Sixth, the program should take advantage of the physical and human resources in the pre-service teacher's community. Seventh, the program should employ circular and formative evaluation of contents and teaching methods as a way of facilitating development and improvement. This study develops and demonstrates an extensive model program that fits these criteria. Also included is discussion related to further studies.

• Carbon letters
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• v.20
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• pp.47-52
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• 2016

Physical and electrochemical qualities were analyzed after KOH activation of a direct methanol fuel cell using needle coke as anode supporter. The results of research on support loaded with platinum-ruthenium suggest that an activated KOH needle coke container has the lowest onset potential and the highest degree of catalyst activity among all commercial catalysts. Through an analysis of the CO stripping voltammetry, we found that KOH activated catalysis showed a 21% higher electrochemical active surface area (ECSA), with a value of 31.37 m² /g, than the ECSA of deactivated catalyst (25.82 m² /g). The latter figure was 15% higher than the value of one specific commercial catalyst (TEC86E86).

• Journal of the Korean Home Economics Association
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• v.17 no.4
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• pp.35-42
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• 1979

The effects of salt concentration on the qualities of cooked egg preparations were evaluated. Diluted egg samples which contained different amounts of slat were prepared by diluting whole egg fluid with rice washing, anchovy stock , or distilled water. After heating them rapidly, hardness, gel strength, and amount of syneresis were determined along with the performance of sensory test. the pH of the diluted eggs also measured before heating. Results obtained from these experiments are summarized in the following. 1. The pH of whole egg, egg yolk, and egg white was 7.32, 6.31, and 8.41 , respectively. 2. The pH whole eggs after addition of diluting solutions and salt showed a little differences over the whole salt concentration as follows. distilled water dilution > anchovy stock dilution > rice washing dilution 3. The hardness and gel strength of cooked samples were increased with the increase of salt concentration in the range of low salt concentrations of all diluting solution. These physical properties marked maximal values at salt concentration of 3% and then decreased as salt concentration increased. 4. Amount of syneresis decreased as salt concentration increased regardless of all diluting solutions used. 5. In sensory test, 1% salt concentration were scored good by the panel members regardless of diluting solutions which showed no significant difference among three diluting solutions.

• Journal of the Korean housing association
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• v.17 no.1
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• pp.165-176
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• 2006

In the design guideline about the existing elderly housing, the equipment related to bathroom are the most important in the secure and functional aspect. On the other hand, the present elderly housing is being designed according to foreign design guideline or common housing form instead of reflecting living and physical qualities of the Korean elderly. Therefore, in this study based on the guideline of the existing literature, we made Mockup furnished with the equipments of bathroom and conducted an experiment in finding proper position and height for Korean elderly enough to use the bathroom conveniently and independently. The equipments of bathroom consist of different height wash bowls, toilet stools, grab bars, and a bathtub. As a result, suitable height of wash bowl is 760 mm $\pm{\alpha}$. We can realized that elderly feel comfortable to grab perpendicular bars of toilet stools more than horizontal ones. So it is necessary for elderly to grip perpendicular of grab bars added to prevention slipping and made shape easy to hold. Most of elderly told us that 500 mm of the bathtub setting is suitable. But many other people feel high. So height of the bathtub must be established lower than 500 mm for safety in the bathroom and for convenience.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.13 no.2
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• pp.43-50
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• 2007

The production, distribution, and consumption of Korean medicinal herbs have increased every year because of an increase of health considerations. But there are no sufficient standardization procedures in packaging and distribution systems related to these herb products. The standardization of packaging material and dimension could be a good addition for establishing proper quality control methods for Korean medicinal herbs. Medicinal herbs deteriorate under physical, chemical and biological hazards such as oxidation, textural change under high moisture content, color change by light, sanitation problems by insect invasion and contamination. Packaging standardization with proper functional packaging materials is critical to ensure the qualities of medicinal herbs. Also, storage and distribution efficiencies can be improved by achieving packaging dimension standardization. This review summarizes recent research trends related to quality evaluation methods and major quality deterioration factors of Korean medicinal herbs. This paper also offers reviews on some of problems and challenges in current packaging and distribution systems of medicinal herb industries and briefly suggests advanced quality control methods through packaging standardization.