• Title/Summary/Keyword: appearance properties

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Properties of Silicon Carbide-Carbon Fiber Composites Prepared by Infiltrating Porous Carbon Fiber Composites with Liquid Silicon

  • Lee, Jae-Chun;Park, Min-Jin;Shin, Kyung-Sook;Lee, Jun-Seok;Kim, Byung-Gyun
    • The Korean Journal of Ceramics
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    • v.3 no.4
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    • pp.229-234
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    • 1997
  • Silicon carbide-carbon fiber composites have been prepared by partially Infiltrating porous carbon fiber composites with liquid silicon at a reaction temperature of $1670^{\circ}C$. Reaction between molten silicon and the fiber preform yielded silicon carbide-carbon fiber composites composed of aggregates of loosely bonded SiC crystallites of about 10$\mu\textrm{m}$ in size and preserved the appearance of a fiber. In addition, the SiC/C fiber composites had carbon fibers coated with a dense layer consisted of SiC particles of sizes smaller than 1$\mu\textrm{m}$. The physical and mechanical properties of SiC/C fiber composites were discussed in terms of infiltrated pore volume fraction of carbon preform occupied by liquid silicon at the beginning of reaction. Lower bending strength of the SiC/C fiber composites which had a heterogeneous structure in nature, was attributed to the disruption of geometric configuration of the original carbon fiber preform and the formation of the fibrous aggregates of the loosely bonded coarse SiC particles produced by solution-precipitation mechanism.

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Quality Characteristics and Storage Stability of Bread with Allium hookeri Powder (삼채가루 첨가 식빵의 제조조건 최적화 및 저장성 연구)

  • Lee, HeeJeong;Baik, Jae-Eun;Joo, Nami
    • The Korean Journal of Food And Nutrition
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    • v.27 no.2
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    • pp.318-329
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    • 2014
  • The purpose of this study was to determine the optimal mixing ratio of Allium hookeri powder and butter in the preparation of bread. The experiment was designed according to the central composite design for estimating the response surface, which demonstrated 10 experimental points, including 2 replicates for Allium hookeri powder and butter. Further, the mechanical and sensory properties of test materials were measured. A canonical form and perturbation plot conveyed the influence of each ingredient on the final product mixture. Overall, the measurement results of the mechanical properties showed a significant increase or decrease in dough pH, sweetness, volume, weight, height, specific volume, a & b-value of crumb and, springiness (p<0.05). Moreover, the sensory measurements demonstrated a significant improvement in color, appearance, texture, moistness and, overall quality. As a result, the optimum formulation from the numerical and graphical methods was calculated as 22.65 g of Allium hookeri powder and 47.77 g butter. After optimization, DPPH free radical scavenging activity, total phenolic content, and total plate counts over 10 days were evaluated. In sum, the results revealed the antioxidant and antibiotic actions of bread with Allium hookeri powder.

A Study on Relationship of Popular Culture and Space Design by Cultural Phenomenon (문화적 현상으로의 대중문화와 공간디자인의 관계성 연구)

  • Min, Seul-Gi;Lee, Chan
    • Korean Institute of Interior Design Journal
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    • v.20 no.4
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    • pp.46-53
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    • 2011
  • Popular culture in modem society is that research is to understand the lives of the public. Since post-modem ism, in a clear perspective of the rapidly developing modern society, and the appearance of various societies have been drawn. Of the phenomenon is playing a large role in the admission of the public can see this was: strange places for the properties in the popular culture to analyze and find the meaning makes carry through their own perspective. It also dominates the field of spatial design for the public to understand cultural perspectives and positions should be aware of the importance of thinking. The relationship between spatial design and popular culture, modern society has become an essential point is changed popular culture that has more space, the design characteristics of the new changes will affect their position. In this study, playing a large role in the modern of culture properties, spatial design, looking at areas of social and cultural positions that are clearly focused. Therefore, the cultural phenomenon here in the popular culture of the design characteristics of the space, according to the visual design direction of modern society present in the space is presented.

A Study on the Changes of Physicochemical Characteristics of Soybeans Curd with Cow's Milk According to the Adding Levels of Mulberry Leaf Powder (뽕잎 첨가수준에 따른 두부의 관능평가 및 일반성분분석에 관한 연구)

  • 김애정;여정숙;방인수;강영림;정건섭;김명희
    • The Korean Journal of Community Living Science
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    • v.14 no.2
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    • pp.63-70
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    • 2003
  • In this experiment, the curd was made from soybean and cow's milk in the ratio of 7 to 3, and coagulated with Glucono-delta-lacton(GDL) and $CaSO_4&.$2H_{2}O& in the 1:1 ratio. During the procedure, the mulberry leaf powder was added. The amount of the added powder varied from 0.1 % to 0.5 %. This experiment aimed to show the change of yield, general components, minerals, amino acid, changes of pH, sensory properties of these products. As mulberry leaf powder addition increased, crude protein, crude fat, crude ash content, minerals and amino acids increased. Whereas moisture content decreased, and in particular,$Ca^{++}$, $K^+$ and $Na^+$ increased. On the other hand, in the sensory properties, the levels of satisfaction about the color, appearance, flavor, texture and savory were lower in mulberry leaf powder added than under control.

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Biological Effect and Chemical Composition Variation During Self-Fermentation of Stored Needle Extracts from Pinus densiflora Siebold & Zucc.

  • Paudyal, Dilli P.;Park, Ga-Young;Hwang, In-Deok;Kim, Dong-Woon;Cheong, Hyeon-Sook
    • Journal of Plant Biotechnology
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    • v.34 no.4
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    • pp.313-322
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    • 2007
  • Extract of Japanese red pine needles has been used in Asia pacific regions since long periods believing its valuable properties as tonic and ability of curing diseases of unidentified symptoms. Some selective compounds present in the extract and their effects were analyzed. Carbohydrates and vitamin c were identified using HPLC; terpenoid compounds by GC-MS; anti-bacterial analysis by paper discs, plates count and gastrointestinal motility by whole cell patch clamp. The extract is a mixture of compounds therefore its diverse effect was expected. Self-fermentation in extract proceeds after spontaneous appearance of yeast strains without inoculation. Effects and composition of the extract vary with varying period of self-fermentation. Extract inhibits the growth of bacteria dose dependently exhibiting its antibacterial properties however effectiveness increases with increase in fermentation period. The extract also can modulate gastrointestinal motility in murine small intestine by modulating pace maker currents in ICC mediated through ATP sensitive potassium channel.

Physicochemical Properties of Hydroxypropylated Corn Starches (하이드록시프로필화 옥수수 전분의 이화학적 특성)

  • Yook, Cheol;Pek, Un-Hua;Park, Kwan-Hwa
    • Korean Journal of Food Science and Technology
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    • v.23 no.2
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    • pp.175-182
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    • 1991
  • Hydroxypropylated starches were prepared by reaction of corn starch with propylene oxide and their physicochemical properties were compared with those of the native starch. Swelling power, solubility and water binding capacity increased with the increase of hydroxypropylation. The hydroxypropylation of corn starch significantly reduced the extent of digestion and iodine absorption. Starch molecules larger than $1.34{\times}10^7{\sim}$ decreased whereas molecules ranging from $1.34{\times}10^7{\sim}1.18{\times}10^5$ increased by hydroxypropylation. Granule size increased by hydroxypropylation but this did not significantly affect the granule surface appearance by SEM. The hydroxypropylation improved the solubility and water binding capacity of corn starch.

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The Effect of Aronia Powder (Aronia melanocarpa) on Antioxidant Activity and Quality Characteristics of Pork Patties (아로니아 분말 첨가가 돈육 패티의 항산화 활성과 품질 특성에 미치는 영향)

  • Kim, Myung-Hyun;Joo, Shin-Youn;Choi, Hae-Yeon
    • Korean journal of food and cookery science
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    • v.31 no.1
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    • pp.83-90
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    • 2015
  • This study was performed to evaluate the effects of adding aronia powder on the antioxidant activities and physicochemical properties of pork patties. The patties were prepared by adding 0%, 1%, 2%, and 3% of aronia powder. Water and ethanol were used to extract the antioxidant compounds from aronia. Total phenolic compounds of the water and ethanol extract of aronia were 164.55 mg/g and 221.08 mg/g, respectively. The total phenol contents and DPPH free radical scavenging activity of patties were significantly increased with the increasing amount of aronia powder. Moisture content in control group was 60.61%, and it was significantly different from the aronia powder groups. The cooking loss rate and reduction ratio significantly decreased with the increasing amount of aronia powder. The hardness, chewiness, and gumminess of the control group were lower than those of the treatment group. In the sensory evaluation, the addition of 1% aronia received the best score in appearance, color, and overall preference. We suggest that aronia powder may be a useful ingredient in pork patties to improve the quality characteristics and antioxidant potential.

Determination of the Effect of Different Ground Mustard Seeds on Quality Characteristics of Meatballs

  • Caglar, Muhammed Yusuf;Gok, Veli;Tomar, Oktay;Akarca, Gokhan
    • Food Science of Animal Resources
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    • v.38 no.3
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    • pp.530-543
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    • 2018
  • This study investigated the effect of yellow, black, and brown mustard seeds on color, lipid oxidation (thiobarbituric acid-reactive substances [TBARS]), and microbiological and sensory qualities of meatballs during storage. Heat treatment of mustard seeds affected the TBARS value of meatball samples (p<0.0001). The addition of mustard seeds decreased TBARS value of meatball samples (p<0.0001). Heat treatment of mustard seeds decreased the $L^*$, $a^*$ and $b^*$ values of meatball samples (p<0.0001). The meatball samples with mustard seeds increased $b^*$ value of meatball samples however it decreased $a^*$ value of meatball samples (p<0.0001). The addition of mustard seeds decreased aerobic mesophilic bacteria count (p<0.0001), Enterobacteriaceae count (p<0.0001), psychrophilic bacteria count (p<0.0001) and yeast and mold count of meatball samples (p<0.0001). On a given storage day, the yellow mustard added meatballs sample was given higher color, appearance, flavor, acceptability ratings than those added black and brown mustard. Regarding sensory and microbiological properties, mustard seed contributed to microbiological quality and sensorial properties of meatball samples.

A Study on Analysis of the Physical Properties of Domestic and Foreign Sensitive Worsted Fabrics - Subjective hand assessments, Comparison between 1st and 2nd experiment - (국내.외 감성 소모직물의 물성분석에 관한 연구(II) - 주관적 태 평가, 1차, 2차 비교.분석 -)

  • Kim, Seung-Jin;Park, Kyung-Soon
    • Science of Emotion and Sensibility
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    • v.11 no.1
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    • pp.113-122
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    • 2008
  • This study surveyed the physical properties of the domestic and foreign worsted fabrics which are used for men's garments. For this purpose, forty specimens which were divided into 1st fourteen specimens and 2nd twenty six ones were prepared and the physical property assessment by Blind field test was carried out by test committee. The subjective test items by Blind field test were chosen as handle(softness, flexibility), color(brightness, deepness), appearance(cleanness, natural lustre) and comparison priority.

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Application of Quantitative Descriptive Analysis to Commercial Soybean Curd (시판 두부의 품질 평가시 정량적 묘사 분석의 적용)

  • Suh, Dong-Soon;Kim, Shin-Hae;Hong, Jae-Hee;Kim, Kwang-Ok
    • Journal of the Korean Society of Food Culture
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    • v.16 no.1
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    • pp.58-64
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    • 2001
  • This study was carried out to develop character notes and to define the terminology for the evaluation of soybean curd using quantitative descriptive analysis. Panelists were selected according to their performance with ranking on basic tastes, flavor and texture properties related to soybean curd. After being trained, they identified the following attributes and defined the terminology: appearance(smoothness of the surface, amount of cracks, yellowness, grayness), flavor(sweet, salt and bitter tastes, cooked bean, raw bean, wet wheat flour, roasted bean, astringency), and textural properties(hardness, elasticity, inner moistness, coarseness, adhesiveness, and residuals). Reference samples for flavor attributes were also determined. Four types of commercial soybean curd were evaluated with the technique developed. Among soybean curd samples, there were significant differences in the intensity of all sensory attributes, confirming appropriateness of the evaluation methodology.

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