• 대학교육
• /
• s.149
• /
• pp.101-105
• /
• 2007

기회균등할당제 자체는 학력이나 계층의 대물림을 완화함으로써 배분적 정의를 실현할 수 있는 하나의 방법으로 그 취지는 매우 바람직하다. 그러나 '정원 외'로 운영될 경우 나타날 수 있는 문제점들은 제도 본연의 목적을 퇴색시켜 종국에는 제도 자체의 실패를 야기하지 않을지 우려된다. 여기서는 이러한 문제점들을 하나하나 짚어 봄으로써, '정원 외' 기회균등할당제의 타당성을 진단해 보기로 한다.

• 대학교육
• /
• s.93
• /
• pp.47-53
• /
• 1998

지금의 사회봉사에 대해 사회 일각에서는 자원봉사를 제도화함으로써 봉사가 강용될 뿐만 아니라 형식적으로 이루어지고 있어 본래 의미를 퇴색시키고 있다는 비판도 있다. 그러나 다른 한편으로 그간의 산업사회의 폐해와 배금주의로 인해 실종된 봉사의 덕목을 소생하고 생활화하는 것은 민족공동체 회복을 위해 바람직하다는 공감대가 형성되고 있다. 특히 자원봉사가 각급학교 교육에 제도화되고 있는 만큼 초.중.고교와 대학의 사회봉사를 연계하여 체계화할 필요성이 크다.

• Journal of the Korean Home Economics Association
• /
• v.46 no.10
• /
• pp.1-9
• /
• 2008

The purpose of this study was to increase uv-cut ability of cotton, ramie, and rayon fabrics dyed with safflower red colorants. For this purpose, samples treated with uv-cut agent and tannic acid were compared with the untreated samples after ultraviolet(uv)-light exposure in terms of K/S value, color changes(${\Delta}E$), SEM, and tensile strength retention. K/S value rapidly decreased with increasing exposure time, but K/S value of the samples treated with both uv-cut agent and tannic acid decreased less than that of untreated samples. As increasing exposure time, $L^*$ and $b^*$ increased, $a^*$ decreased, and so ${\Delta}E$ increased, indicating less red character and more yellow character in color. This leads to change hue, value and chroma value. But color change of samples treated with both uv-cut agent and tannic acid was less than that of untreated samples. SEM pictures showed a severe degradation by uv exposure in all samples. Tensile strength slowly decreased for 21 days. And after this point, the decreased proceeded more rapidly. Tensile strength retention of the samples treated with uv-cut agent and tannic acid was higher than that of untreated samples.

• Journal of the korean veterinary medical association
• /
• v.30 no.7
• /
• pp.424-437
• /
• 1994

The pathological observation was carried out on the swine carcasses, which were slaughtered from the abattoir in Pusan and purchased by a meat processing company, for a year. The results obtained were as follows ; The examined carcasses were 13,083 pigs a

• Conservation Science in Museum
• /
• v.1
• /
• pp.43-51
• /
• 1999

This is a brief study on the influence of fumigation (using mixed gas of methyl bromide and ethylene oxide) on old paintings. Fumigation is principally used to prevent biological damage of objects. Thirteen objects, including old colored map from Chosǒn Dynasty and some paintings, were selected for this research. Before and after fumigation, color measurements were made and changes of pH value were measured. The result is that the fumigation did not affect on discoloration of colored area and acidity of paper, as far as the standard of application(such as concentration of gas, exposing time and ect.) of fumigation was kept.

• Applied Biological Chemistry
• /
• v.43 no.1
• /
• pp.39-45
• /
• 2000

The stability of vitamin A, $B_1,\;B_2,\;B_6$, C in aqueous multivitamin solutions was carried out by means of estimation of reaction velocity and the results are described in this paper. The stability of vitamin A, $B_1$ and C due to thermal degradation method in aqueous multivitamin solutions was evaluated at 40, 50, 60 and $70^{\circ}C$ up to 40 days. The shelf-lives of vitamin A, B₁ and C in this preparation, calculated using the Arrhenius equation, were 1493, 449 and 639 days at $25^{\circ}C$ respectively. Examination was made on the effect of initial concentration of vitamin $B_2$$(C_0)$ on light fading of vitamin $B_2$ in aqueous multivitamin solutions and it was found that the fading progressed according to the following formula : $-{\frac {dc}{dt}}=K_c\;{\frac C{C_0}}$ where Kc is apparent light-fading rate constant relate to $C_0$. Photodecomposition of vitamin $B_6$ in aqueous multivitamin solutions was apparently first order kinetics and was stable in polyethylene>brown color>glass container to sunlight. Photodecomposition of vitamin $B_6$ in four seasons also investigated.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.14 no.2
• /
• pp.117-122
• /
• 1985

The effects of various factors on the color stability of plum nectar were studied. The data showed that pH and temperature were the most important factors affecting the rate of color loss. The concentration of ascorbic acid affected the rate of color loss in plum nectar. Although the color loss could be influenced by the presence of sugars and their degradation products such as 5-hydroxymethyl-2-furfural(HMF), HMF did not accumulate in sufficient amounts during the storage in the plum nectar to affect appreciably the degradation rate. The pigment was very unstable in the fermented juice and its. spectrophotometric spectrum was changed differently from that of natural plum color material. Materials present in plum nectar itself apparently have an appreciable effect on the rate of color loss.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.12 no.2
• /
• pp.66-72
• /
• 1983

In order to improve the quality of salted sea mustard, the conditions of blanching, salting, and storage were examined. The process in which sea mustard was blanched for 20 seconds in boiling seawater, soaked in saturated brine solution for 20 hours and then salted for 10 hours by the spreading 10~20% (w/w) of granulated dry salt to obtain the moisture content of about 60% or below, resulted a good color retention of chlorophyll and carotenoid pigments, and organoleptic quality. The shelf-life of the product estimated by 30-40% pigment retention was 50-60days when stored at $4^{\circ}C$ or below.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.32 no.6
• /
• pp.947-958
• /
• 2008

To study the effect of a washing machine with silver nano technology on its detergency, the discoloring of the dyed clothes and the staining of standards adjacent fabrics were examined. As the laundry specimen, cotton fabric dyed with reactive dyes and Polyester fabric dyed with disperse dyes were chosen; and as the adjacent fabrics, undyed cotton. polyester and nylon fabrics were chosen. The colorfastness was evaluated after washing under conditions that those washing temperature, liquor ratio, detergency concentration and the type of water were varied. When the clothes were washed with the tap water contains silver ion, the deposition of silver compounds into the washed clothes was measured. As a results, after the washing in the various conditions, discoloring of the dyed clothes was not intense. The higher the washing temperature and the lower the liquor ratio, the larger the staining appeared on the white fabrics; especially for the white nylon fabrics. The concentration of detergent and the type of water affected hardly the colorfastness. After the repeated washing with the water contains silver, whiteness of the cotton and the nylon fabrics were lower than the result after the washing with the tap water, and a quantity of silver ions was found on the washed clothes.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.12
• /
• pp.23-32
• /
• 2020

This study investigated the thermal degradation and fading behavior of PTT dyed with vat dye and its dyeing ability. The PTT sample was dyed with vat dye using an acid treatment and pad-steam method to improve the dyeing performance. This method made dye particle nanosize and allowed it to penetrate the polymer material easily. The sample dyed using the pad-steam method showed level dyeing and enhanced dyeing affinity, compared to the batch-dyeing method. The degradation behavior of PTT dyed with vat dye after each heat and UV treatment was examined with the change in tensile strength or K/S value on the sample. The tensile strength and K/S values of the sample dyed with vat dye after the heat and UV treatment decreased with increasing temperature and exposure time. Although they showed high degradation under severe conditions, its rate constant was improved compared to the samples dyed with disperse dye. Consequently, acid treatment and the pad-steam method resulted in the introduction of vat dye on PTT. In addition, the PTT dyed with vat dye showed enhanced thermal and UV resistance because of their high molecular weight and chemical structure for stable adsorption behavior.