• Title/Summary/Keyword: DIS process

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Study on Dewatering and Impregnation Soaking Process (침지공정에서의 탈수 및 용질 침투현상에 관한 고찰)

  • Choe, Dong-Won;Sin, Hae-Heon;Choe, Hyeong-Taek
    • The Korean Journal of Food And Nutrition
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    • v.10 no.4
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    • pp.462-467
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    • 1997
  • The DIS process(dewatering and impregnation soaking process) are using for dewatering of food materials at room temperature. And the DIS process are resulted in diffusion process as well as dewatering phenomena. During the DIS process, plasmolysis or cytorrhysis was happened by according to solute size. A tissue state of food material was very important variables for movement of water or solute, and running conditions are important for dewatering and impregnation. And models for DIS process were fundamentally given by Fick's law at unsteady state or mass balance. For example, Bicompartmental Model was given for quantification of water loss and solid gain.

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Effect of DIS Process on in vitro Physiological Functionality of Aloe vera Gel (알로에 겔의 in vitro 생리기능 특성에 미치는 삼투탈수공정의 영향)

  • Kim, Sung-A;Baek, Jin-Hong;Lee, Shin-Young
    • Food Engineering Progress
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    • v.13 no.4
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    • pp.251-261
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    • 2009
  • In vitro physiological functions such as jack bean (Canavalia ensiformis) urease inhibitory activity and retarding effect of glucose/bile acid of Aloe vera gel concentrated by the optimized DIS (Dewatering Impregnation & Soaking) process conditions were examined. Urease inhibitory activity of DIS aloes ranged from 84.6 to 94.4%, which was similar to or higher than 86.3% of fresh aloe. Also, urease inhibitory activity of DIS aloes was maintained at initial levels after heat treatment (90$^{\circ}C$, 10 min.) and drying treatment (freeze or hot air drying). Urease inhibition pattern from Lineweaver-Burk plot indicated general non-competitive inhibition, and inhibition constants ($K_{IE}$ and $K_{IES}$) of DIS aloes were 41-149 and 87-163 $\mu$L/mL, respectively. DIS(glucose) and DIS(polyethylene glycol) exhibited the highest retarding effect of glucose and bile acid. Their retarding effects were about 1.6 and 1.8 folds higher than that of fresh aloe after 0.5 and 1 hr of the dialysis, respectively. Conclusively, the above in vitro physiological functions of Aloe vera gel concentrated by DIS process suggested that aloe products treated with DIS would have the potential benefits for protection against Helicobacter pylori and reduction of blood glucose and cholesterol levels.

Structural and Physicochemical Properties of Dried Aloe Vera Gel Using DIS (Dewatering & Impregnation Soaking) Process (삼투탈수 알로에 건조제품의 구조적 및 물리화학적 특성)

  • Kim, Sung-A;Baek, Jin-Hong;Lee, Shin-Young
    • Food Engineering Progress
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    • v.13 no.1
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    • pp.24-31
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    • 2009
  • The structural and physicochemical properties of dried aloe vera gel by DIS (dewatering impregnation soaking) process under optimum conditions were investigated. FT-IR spectra for dried samples of DIS aloes showed the typical patterns of standard aloe polysaccharide, and surface structures by SEM (scanning electron microscopy) were similar to a gel-like structure. In case of physicochemical properties of dried aloe samples by DIS process, solubilities and swelling powers of control (not osmotic treated aloe), DIS (S) and DIS (G), samples treated by osmotic solution of 60% sucrose/0.25% NaCl and 50% glucose/0.5% NaCl, were 48.3-57.3% and 8.3-11.7%, respectively, showing no significant differences among samples, but swelling power of DIS (PEG), sample treated by using 50% polyethylene glycol as an osmotic agent was about 5 times higher that of control. Also, water holding capacities of control, DIS (S) and DIS (G) were similar to each other, but that of DIS (PEG) was about 5 times higher that of control. Oil holding capacities of control and DIS aloes maintained the 50.9-86.4% levels of water holding capacities showing no significant differences among samples. Rehydration ratio of DIS (PEG) aloes were significantly dependent on the temperature of rehydrated solvent (water), and rehydration ratio of not-fileted aloe was about two folds higher than that of fileted aloe.

A Study on the Meaning of Dis-joint in the Architecture of Louis Kahn (루이스 칸 건축에 나타나는 반접합(反接合)의 의미에 관한 연구)

  • Kim, Nak-Jung;Chung, Tae-Yong
    • Korean Institute of Interior Design Journal
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    • v.18 no.3
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    • pp.39-46
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    • 2009
  • The purpose of this study is to analyze the meaning of 'dis-joint' in the works of Louis I. Kahn. Kahn tried to realize his main architectural thoughts of 'what it wants to be' and 'how it was done' through his whole life. The concept of 'dis-joint' had been developed to visualize his architectural thoughts. Kahn used' dis-joint' to show and emphasize the structural system for the raison d'etre of building. Kahn's 'dis-joint' can be categorized as 'spacing', 'butt', 'slit' and 'protrusion'. Kahn used this kind of unusual way of joint beyond simple exposure to stress the existence of element, part and building itself. Through variable combination usage of 'dis-joint', Kahn can realize his architectural thoughts into building in a concrete way. The efficiency and function of joint is not the main issue in his works. 'Dis-joint' was the concrete tool to show the tectonic of architecture and construction process to enhance its presence. Therefore 'dis-joint' of Kahn's architecture is not a joint only to combine building parts but a concrete mean to realize his thoughts in a corporeal way. These facts insinuate that Kahn's architectural philosophy is based on the thoughts of tectonic and its realization.

Preparation and Characterization of PEG-impregnated Aloe Gel through DIS Processing of Aloe vera Leaf Slice (DIS 공정에 의한 Polyethylene Glycol 함침 알로에 베라 겔의 제조 및 특성화)

  • Kwon, Hye Mi;Hur, Won;Lee, Shin Young
    • KSBB Journal
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    • v.28 no.6
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    • pp.356-365
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    • 2013
  • The novel Aloe gels were prepared with dewatering and impregnation by soaking (DIS) processing of Aloe vera leaf slice at four different temperatures (25, 35, 45 and $55^{\circ}C$), using dehydration solution of 40% (w/v) polyethylene glycol (PEG4000). The PEG-impregnation to Aloe vera leaf slice during DIS was observed depending on immersion temperature, and the PEG-impregnated Aloe vera gel (PEG-i-AVG) obtained was characterized using $^1H$ NMR, FT-IR, GPC, XRD and TGA. The PEG-i-AVG had the higher levels of Aloe bioactives (glucomannan and O-acetyl contents) and better quality indices by $^1H$ NMR and FT-IR spectroscopy than those of native Aloe gel. Also, the obtained Aloe gel maintained the bimodal patterns in higher molecular weight region by GPC indicating no degradation of polysaccharide from native Aloe gel. The result observed by SEM confirmed a surface modification by forming the porous structure, and TGA result exhibited better thermal stability than that of native Aloe gel. XRD result revealed that the crystalline structure in Aloe gel was led by incorporation of PEG. Significant decrease of %insolubility and high enhancement of water solubility index were observed, respectively, and highly ordered conformation such as a helix structure was also indicated by Congo red reaction. We concluded that the modification effect for enhancing function of native Aloe gel was successfully obtained by DIS process using PEG as a dehydrating agent. These results suggested that this DIS process had a high potential for developing a new minimally processed product from Aloe vera leaf.

A Study on U-Drawing Information System Based on Risk Assessment (위험성 평가 기반의 U-도면정보 시스템에 관한 연구)

  • Ko, Jae-Wook;Yoo, Jin-Hwan;Lee, Heon-Seok
    • Journal of the Korean Institute of Gas
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    • v.11 no.2 s.35
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    • pp.71-77
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    • 2007
  • This research proposes the U-drawing information system (U-DIS) based on risk assessment. One of the most outstanding features of U-DIS is to perform the Quantitative Risk Assessment directly on the screen utilizing the Process Information. U-DIS revolutionizes the existing way to do a risk assessment and helps finding information more efficiently and simply. It is designed to open all CAD drawing files on the web-based environment without having the CAD S/W installed on the PC. The U terminal platform in U-DIS supports IPv6 and wireless broadband network and U-DIS can be accessible through a sensor or personal authorization. This results in providing a systematic safety enhancement tool considering not only the operation of the process but also its risk level in the equipment industry. Additionally to aid the decision making process it offers comprehensive and thorough information based on engineering technical theory.

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On the Integrated process of RSS model and ISO / DIS 21448 (SOTIF) for securing autonomous vehicle safety (자율주행 자동차 안전성 확보를 위한 RSS 모델 및 ISO/DIS 21448 (SOTIF) 통합 프로세스 구축에 관한 선행연구)

  • Kim, Min Joong;Kim, Tong Hyun;Kim, Young Min
    • Journal of the Korean Society of Systems Engineering
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    • v.17 no.2
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    • pp.129-138
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    • 2021
  • Today, as the number of vehicles equipped with autonomous driving functions increases, the use of various sensors increases, and the complexity of system configuration increases. The ISO 26262 standard was published to prevent caused by systematic errors. Recently, the issue of external environmental factors rather than mechanical failure has increased. This issue is a problem outside of the scope of ISO 26262, and the ISO/DIS 21448 standard was published to solve this problem. Also, Mobileye proposed the RSS model that defined safe distance for dangerous situations in order to secure the safety of autonomous vehicles and who is responsible in case of an accident. In this paper, integrated process of ISO 21448 and RSS model, and through these results, we expect that possible to contribute to securing the safety and reliability of autonomous vehicles in the future.

A Research and Analysis for ISO 9000 Certification of Small and Medium Manufacturing Companies (ISO 9000 인증획득 준비의 문제점과 개선 방안에 대한 실증적 연구 -중소제조기업을 중심으로-)

  • 유재권
    • Journal of the Korean Professional Engineers Association
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    • v.33 no.6
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    • pp.87-92
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    • 2000
  • As more and more companies pursue ISO 9000 certification, the adaptation of ISO 9000 has brought about some significant positive effects to domestic quality systems However, somenegative results occurred in domestic industries rushing to fulfill the requirements of these new quality systems. The primary objective of this research is to provide the efficient implemen tation process of ISO 9000 certification on the basis of total quality management concerning with ISO/ DIS 9000:2000, ISO/ DIS 9001:2000, ISO/DIS 9004:2000. this study has been conducted using the data collected from 325 Korean small and medium manufacturing companies which registered ISO 9000 certification in March 2000. The first, the adoption of a quality manage ment system needs to be a strategic decision of the organization. The design period of the adoption of a quality management system is influenced by the size of the organization, the products process, KS certification, the rate of management.

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Leaf Senescence in a Stay-Green Mutant of Arabidopsis thaliana: Disassembly Process of Photosystem I and II during Dark-Incubation

  • Oh, Min-Hyuk;Kim, Yung-Jin;Lee, Choon-Hwan
    • BMB Reports
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    • v.33 no.3
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    • pp.256-262
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    • 2000
  • In this study the disassembly process of chlorophyII (ChI)protein complexes of a stay-green mutant (ore10 of Arabidopsis thaliana) was investigated during the dark incubation of detached leaves. During this dark-induced senescence (DIS), the Chi loss was delayed in the mutant, while the photochemical efficiency of photosystem II (PSII) or Fv/Fm was accelerated when compared with the wild type (WT) leaves. This indicates that the decrease in Fv/Fm is a separate process and not causally-linked to the degradation of Chi during DIS of Arabidopsis leaves. In the native green gel electrophoresis of the Chi-protein complexes, which was combined with an additional twodimensional SDS-PAGE analysis, the delayed senescence of this mutant was characterized by the appearance of an aggregate at 1 d or 2 d, as well as very stable light harvesting complex II (LHCII) trimers until 5 d after the start of DIS. The polypeptide composition of the aggregates varied during the whole DIS at 5 d. Dl protein appeared to be missing in the aggregates. This result supports the idea of a faster depletion of functional PSH in the mutants compared with WT, as suggested by the earlier reduction of Fv/Fm and the stable Chl a/b ratio in the mutants. At 5 d, the WT leaves also often showed aggregates, but the polypeptide composition was different from those of ore10. The results presented suggest that the formation of aggregates, or stable LHCII trimers in the stay-green mutants, is a way to structurally protect Chi-protein complexes from serious proteolytic degradation. Detailed disassembly processes of Chi-protein complexes in WT and ore10 mutants are discussed.

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Potential Influence of Expectation-Performance Dis-Confirmation and Perceived Justice for Service Recovery upon Fashion-Product Consumers' Satisfaction and Loyalty (서비스 회복에 대한 기대-성과 불일치와 지각된 공정성이 패션 상품 고객의 만족도 및 충성도에 미치는 영향)

  • Shin, Su-Yun;Lee, Jung-Im
    • The Research Journal of the Costume Culture
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    • v.18 no.3
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    • pp.526-540
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    • 2010
  • Due to fierce competition, many domestic fashion businesses are suffering difficulty in securing and maintaining customers. Accordingly, fashion companies are devoting all their energy to secure customers by using high quality and diverse strategies for distribution and promotion, and to secure loyalty by satisfying customers with the offer of excellent service. Thus, it is very important to provide systematic service recovery strategy available for handling service failure effectively. Therefore, the purpose of this study is comprehensively analyzing influences of expectation dis-confirmation and perceived justice for service recovery upon consumers' satisfaction and loyalty. The findings are as follows. First, as for the service failure that customers experienced, the more consumers who expect it to be recovered led to the higher formation of expectation-compensation dis-confirmation. Second, it was indicated that the higher seriousness in service failure that customers experienced led to the lower satisfaction and loyalty to service recovery. Third, as a result of examining influence of expectation-compensation dis-confirmation for service-failure recovery upon consumer satisfaction and loyalty, the customers who showed more positive dis-confirmation to expectation-compensation were indicated to form the more satisfaction and loyalty. Fourth, as a result of examining the influence of the perceived justice in the process of service-failure recovery upon customer satisfaction, all in 3 dimensions of justice had effect on customer satisfaction.