• Korean Journal of Food Science and Technology
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• v.18 no.6
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• pp.431-436
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• 1986

The action of crude amylolytic enzymes extracted from Wonki and Chunmi sweet potatoes, ${\alpha}-amylase$, and ${\beta}-amylase$ on the sweet potato starches from Wonki (dry type) and Chunmi (moist type) were studied. The activity of crude amylolytic enzyme extracted from Wonki was higher than that extracted from Chunmi. The content of reducing sugar released from the reaction between crude amylolytic enzyme and Chunmi starch preheated at $70^{\circ}C$ was higher, but that preheated at $95^{\circ}C$ was lower than that from Wonki starch preheated at the same temperature. The activites of ${\alpha}-amylase$ and ${\beta}-amylase$ on the Wonki starch were higher than those of the Chunmi starch at the same conditions. Iodine affinity of amylolytic enzyme-treated starch was decreased and enzyme treated starch granule shape was found with porous structure having inner layers. X-ray diffraction patterns of amylolytic enzyme-treated starches were the Ca type like the intact starches and relative crystallinity was decreased.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.9
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• pp.1388-1393
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• 2014

To enzymatically prepare amylopectin cluster (APC), cyclodextrin glucanotransferase (CGTase I-5) and its mutant enzyme from alkalophilic Bacillus sp. I-5 were employed, after which the hydrolysis patterns of CGTase wild-type and its mutant enzyme toward amylopectin were investigated using multi-angle laser light scattering. CGTase wild-type dramatically reduced the molecular weight of waxy rice starch at the initial reaction, whereas the mutant enzyme degraded waxy rice starch relatively slowly. Based on the results, the molecular weight of one cluster of amylopectin could be about $10^4{\sim}10^5g/mol$. To determine production of cyclic glucans from amylopectin, matrix-assisted laser desorption ionization time-of-flight mass spectrometry was performed. CGTase I-5 produced various types of cyclic maltooligosaccharides from amylopectin, whereas the mutant enzyme hardly produced any.

• Journal of the Korean Home Economics Association
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• v.26 no.1
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• pp.163-177
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• 1988

The purpose of this study was to investigate the supporting-attitude type of the eldest son and his wife living seperately from his parents. This research focused on the various degree of intergenerational solidarity between the eldest son and his wife and his parents. For this study, the supporting-attitude types were classified into 4 types: these combine 2 types of residence (living together with the parents or living seperately from the parents) with 2 types of financial support (with with-out financial support0. The concept of intergenerational solidarity, comprises three elements: objective solidarity, subjective solidarity (attachment and conflict), and consensual solidarity (filial obligation). The subjects of this study were 166 couples living seperately from son's parents in Seoul city. The data were analyzed by multiple discriminant analyses, one way ANOVA's, and the paired t-test. The results of this study are as follows; 1. Although the majority of the eldest sons live now away from the parents home, they expect to eventually live together with and support their parents financially. The majority of the wives, however, do not want to live together with their husbands' parents even though expecting to support them financially. 2. According to the discriminant analyses, the supporting-attitude types of the eldest sons were discriminated by attachment and conflict, and those of their wives by conflict and obligation. 3. There were significant difference between supporting-attitude types in terms of intergenerational solidarity. In general, the couples expecting to live together with the parents reported a higher degree of attachment, a stronger sense of obligation, and a lower degree of conflict than the couples expecting to live seperately from the parents. 4. Significant differences between the husbands and the wives were found in attachment, obligation, and conflict. While the husbands showed higher attachment and obligation than their wives, the wives showed higher conflict than the husbands. No significant difference, however, was found between the couples in objective solidarity.

• Journal of Digital Convergence
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• v.18 no.5
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• pp.127-138
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• 2020

This study investigated the patterns of transition of consumption patterns in Korean households in 2010 and 2017, and the impact of the life cycle on the transition of consumption patterns between the two time points. Using information on 4,717 households from the 2010 and 2017 data of the Korean Labor Panel Survey, we examined the effect of the family life cycle on changes in consumption patterns. The results of the latent transition analysis on the change in consumption type showed that the change in consumption type between the two points of time at the household level was relatively active. The logistic regression models reported that the transition of consumption type varies depending on the life cycle, such as changes in marital status, birth and independence of children. These results provide the implication that it is necessary to consider from the perspective of the family life course how the transition between their consumption types occurs when the government establishes consumption policies and companies set marketing target groups.

• Korean Journal of Materials Research
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• v.11 no.5
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• pp.378-384
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• 2001

In this study, nanostructured Fe-Ce powder with grain size of 10nm was produced by MA (mechanical alloying) process and was consolidated by PECS (pulse electric current sintering) process for the fabrication of bulk nanostructured Fe-Co softmagnetic alloy. PECS process was performed at 700, 800, 900 and $^1000{\circ}C$ with holding time ranging from 0 to 15min. The effectiveness of PECS Process to Produce nanostructured bulk specimens was estimated. The optimal PECS process condition for nanostructured Fe-Co powders was found through observing the change of relative density and microstructure with sintering temperature and holding time. The magnetic properties of the sintered specimens were evaluated through the measurement of coercivity and saturation magnetization.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.451-457
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• 2017

The purpose of this study was to investigate the effect of psychobiographical information on the attitude change toward mentally ill people. For this, 30 college students were randomly assigned to one group that received a psychobiographical information(PBI) and the other group a psycho-pathological information(PPI). Measures of attitude change were favorability, reliability, and social distance. The results were significantly different only in social distance between the two groups. Within each group, there was a significant change in favorability only in the psycho-pathological information group, and there was a significant change in the favorability, reliability and social distance in the psychobiographical information group. These results are significant in that they have empirically confirmed that a psychobiographical approach can be effective in changing attitudes toward mentally ill people.

• Journal of IKEEE
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• v.21 no.1
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• pp.24-29
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• 2017

In this paper, we have developed the nano carbon tile and chip which is based on a reducing process of oxidation and the viscous fluid control, after hardening to the stylene monomer and methylol acrylamide monomer using an acrylic emulsion junction material. Then we can obtain the sphere form structure of diagonal 1~3 mm, they have mixture the acrylic emulsion junction material(45%) and the coconut carbon powder(55%) of size 300~500 mesh for 25~30 min. Finally, if we have dry for the formated carbon including 30~90 minute at $90{\sim}300^{\circ}C$, then be obtained for pure carbon formation of 95%. In order to identify the safety of the friendly circumstance carbon formation, we have tested the far-infrared ratio, energy analysis, gas density and anti-disease germs experiment.

• Korean Journal of Food Science and Technology
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• v.41 no.4
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• pp.369-373
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• 2009

${\alpha}$-Waxy corn starch was used as a feed for twin-screw extrusion in order to enhance starch liquefaction with added thermostable ${\alpha}$-amylase (derived from Bacillus licheniformis). The residence time distribution and starch liquefaction were investigated. The starch liquefaction was analyzed in terms of reducing sugar contents, molecular size from gel permeation chromatography (GPC), and microstructure from scanning electron microscopy (SEM). The use of ${\alpha}$-starch contributed to the production of more reducing sugar than the use of raw starch use alone. From GPC, the effect of ${\alpha}$- starch on the molecular size reduction was shown to be small. From SEM, irregular and damaged surface were observed on the extrudate from ${\alpha}$-starch, as compared to those from raw starch. The spread of residence time distribution curves was greater with feed of ${\alpha}$-starch than raw starch, indicating that ${\alpha}$-starch was hard to flow forward during extrusion. This could be improved by increasing the feed moisture content and barrel temperature of extruder.

• Korea Real Estate Review
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• v.28 no.3
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• pp.7-19
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• 2018

Prior studies concerning the analysis of parents' homeownership on its offspring usually focus on the transmission of tenure between two generations. This study adopted a more comprehensive approach on this topic so the effects of parents' homeownership were analyzed through the economic performance of their sons. Korean labor panel data were used to test hypotheses on intergenerational transmission of parents' homeownership. The period covered years 2000 to 2014, consisting of about 862 samples, while many socioeconomic variables were selected through a filtering process. The results of the three hypotheses showed the following consequences. First, parents' homeownership was a meaningful factor in determining their son's housing tenure. Second, parents who are homeowners tended to have more educated sons. Third, parents' homeownership did not affect their son's annual income. This study showed more extensive effects of homeownership, and government strategy must consider this additional benefit in homeownership policies.

• (The) Research of the performance art and culture
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• no.43
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• pp.381-403
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• 2021

Cheonsubara Dance is one of the most important ceremonies in Buddhist rituals. This paper is a study on principles of Cheonsubara Dance in Yeongnam. This also distinguishes the Cheonsubara Dance performed for about 7 minutes with no patterns according to 'The Great Dharani of Spiritually Sublime Phrases' by dance words, and analizes its combinations and principles. Cheonsubara Dance in Yeongnam consists of 7 dance words(Greeting, Carrying, Carrying with 180° rotation, Bara-Garugi, Bara-Garugi with both hands, rotate once, Bara-chigi), and put together according to the number of letters from 'The Great Dharani of Spiritually Sublime Phrases'. Usually, the principles can be seen through 4 types of changes from the dance: 1) When letters of 'The Great Dharani of Spiritually Sublime Phrases' appear consecutively with the same number of characters, 2) When a two-letter word turns into a three-letter word, 3) When the opposite of 2) occurs, 4) When 2~3 letter words change in a row.