• Title/Summary/Keyword: Chain Structure

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The Fine Structure of Amylopectin and Physicochemical Properties of Starch Granules from Endosperm Varieties in Glutinous Rice (찹쌀 전분의 미세구조 및 이화학적 특성 비교)

  • Sung, You-Me;Nam, Seok-Hyun;Kang, Mi-Young
    • Applied Biological Chemistry
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    • v.43 no.1
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    • pp.18-23
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    • 2000
  • stract : Fourteen varieties of glutinous rices were examined on amylopectin fine structure and physicochemical properties of starch granules. The amylopectin chain length distribution and short chain/long chain ratio were investigated by enzymatic treatments followed by high-performance size-exclusion chromatographic separation. Chain length distribution profiles of the isoamylase-debranched amylopectins showed distinct patterns according to varieties. Beongok showed the highest short chain/long chain ratio, while TP2579A1 showed the lowest one. Sharebyeo-152-1-B showed the highest hydrolysis rate to 15% $H_2SO_4$, while Sandong 47 showed the lowest one. Fourteen varieties of rice starch granules showed A-type pattern on X-ray diffractograms. Non-gelitinized starch granules from Keochang 1 and Beongok had almost 100% hydrolysed by glucoamylase for 3 hrs at $370^{\circ}C$.

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Crystal Structure of Acyl-CoA Oxidase 3 from Yarrowia lipolytica with Specificity for Short-Chain Acyl-CoA

  • Kim, Sangwoo;Kim, Kyung-Jin
    • Journal of Microbiology and Biotechnology
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    • v.28 no.4
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    • pp.597-605
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    • 2018
  • Acyl-CoA oxidases (ACOXs) play important roles in lipid metabolism, including peroxisomal fatty acid ${\beta}$-oxidation by the conversion of acyl-CoAs to 2-trans-enoyl-CoAs. The yeast Yarrowia lipolytica can utilize fatty acids as a carbon source and thus has extensive biotechnological applications. The crystal structure of ACOX3 from Y. lipolytica (YlACOX3) was determined at a resolution of $2.5{\AA}$. It contained two molecules per asymmetric unit, and the monomeric structure was folded into four domains; $N{\alpha}$, $N{\beta}$, $C{\alpha}1$, and $C{\alpha}2$ domains. The cofactor flavin adenine dinucleotide was bound in the dimer interface. The substrate-binding pocket was located near the cofactor, and formed at the interface between the $N{\alpha}$, $N{\beta}$, and $C{\alpha}1$ domains. Comparisons with other ACOX structures provided structural insights into how YlACOX has a substrate preference for short-chain acyl-CoA. In addition, the structure of YlACOX3 was compared with those of medium- and long-chain ACOXs, and the structural basis for their differences in substrate specificity was discussed.

Biochemical Studies on the Sugar Chain Structure of Glycoproteins with the Same Protein Core of Bovine Milk Fat Globule Membrane (공통의 1차 구조를 가진 우유 지방구막 구성단백질의 당쇄 구조에 관한 생화학적 연구)

  • Seok, Jin-Seok
    • Journal of Dairy Science and Biotechnology
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    • v.21 no.2
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    • pp.138-147
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    • 2003
  • We here analyzed and proposed the structures of the N-linked sugar chains of PAS-7 from bovine milk fat globule membrane. The N-linked sugar chains were liberated from PAS-7 by hydrazinolysis and, after modifying the reducing ends with 2-aminopyridine (PA), were separated into one neutral (7N,55%) and two acidic (7M mono-, 43%; 7D, di-, 2%) sugar chain roups. The latter were converted into neutral groups (7MN and 7DN) by sialidase digestion. The structure of each of these PA-neutral sugar chains was determined by sugar analysis, sequential exoglycosidase digestion, partial acetolysis, and 1H-NMR spectroscopy. The results show that the 10 sugar chains were of the biantennary complex type with and without fucose. The structure of 7N2A one of the major sugar chains, was proposed as; [structure: see text] A structural comparison between PAS-6 and -7 indicated that although they shared the same protein core, their sugar moiety was markedly different, involving the existence of a different pathway during the post-transcriptional modification.

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Value Structure of Experiential Rental Hanbok Companies Based on Means-end Chain Theory (수단-목적 사슬이론에 따른 체험용 대여한복업체의 가치구조)

  • Kim, Min Ji;Kim, Soon-Young
    • Journal of the Korean Society of Clothing and Textiles
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    • v.46 no.2
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    • pp.331-348
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    • 2022
  • This study explores the value structure of experiential rental Hanbok companies using the means-end chain theory. For this, soft laddering was conducted for nine experiential rental Hanbok companies located in Jeonju Hanok Village. Next, the value structure was created. The results are as follows. First, the elicited values are in the following order: "creation of wealth," "promotion of Korean culture," "aesthetic value," "self-actualization," "community development," and "transmission of tradition." Second, most attributes are connected to "creation of wealth." Third, "promotion of Korean culture" and "community development" are similar to Holden's instrumental values. Fourth, some attributes linked to "aesthetic value" express what the experiential rental Hanbok companies consider to be beautiful. Fifth, the companies pursue "company satisfaction" through "consumer satisfaction" and "company differentiation," which leads to "self-actualization" and "aesthetic value." Sixth, it seems that "transmission of tradition" can be achieved through "expertise/expert training," indicating that some companies think expertise is necessary for the transmission of Hanbok and do it. This study is significant because it is a new attempt to understand the core values of experiential rental Hanbok companies and provides insights into their growth.

공급사슬네트워크

  • Ahn, Ung
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2003.11a
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    • pp.243-246
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    • 2003
  • A radical environmental change of enterprise and varieties of customer needs demand that the value-added activities of enterprise should be restructured and coordinated. But it is not sufficient that the reengineering processes are restricted withen a firm, so the value-added processes should be expanded into intercompany. The integrated organizational structure between enterprises refer to supply chain network. In this paper we present characteristics, structure concepts, and axiomatic model of supply chain network.

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Analysis on the Supply Chain of Port & Logistics, Industry from the Viewpoint of its Relationship (관계 유형 관점에서의 항만물류 공급망 분석)

  • Choi Hyung-Rim;Park Nam-Kyu;Kwon Hae-Kyoung;Yoo Dong-Yeol
    • Journal of Korea Society of Industrial Information Systems
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    • v.10 no.3
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    • pp.38-47
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    • 2005
  • To efficiently manage the supply chain of an industry, the structure and characteristics of a supply chain have to be predefined and it is strongly required to get a framework to analyze a supply chain. We have developed a framework to analyze a supply chain from the viewpoint of chain relationship. It is possible to evaluate the degree of supply chain of each entity by using the framework. We have applied the framework to the port & logistics industry. From this research, we have identified tile current status of supply chain of port & logistics industry in the Korea and extracted some considerations for the healthy supply chain of Korean port & logistics industry.

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Research on the Way to Promote the Value Chain of Animation Digital Publishing in the Context of AI

  • Zhang, Tiemo;Zhang, Mengze;Bae, Ki-Hyung
    • International Journal of Contents
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    • v.15 no.4
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    • pp.107-112
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    • 2019
  • With the development of AI (artificial intelligence), animation digital publishing has been integrated with intellectualization. This paper adopts the theory of the global value chain, and analyzes the basic structure of the animation publishing value chain. Then focuses on the analysis of digital technology and artificial intelligence technology to play an active role in the topic selection and content customization of animation digital publishing products, optimization of publishing platforms, and user experience of publishing products. Finally, it proposes the use of artificial intelligence data analysis and deep learning technology. The purpose of this paper is to realize the upgrading of animation digital publishing, product upgrading, industrial chain upgrading, and identify some promotion methods for the value chain, such as copyright protection.

Mass Spectrometry of Dammarane Triterpenoids (Dammarane계(係) Triterpenoid의 질량분광분석(質量分光分析))

  • Han, Byung-Hoon;Kim, Jae-Hoon;Chi, Hyung-Joon
    • Korean Journal of Pharmacognosy
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    • v.10 no.2
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    • pp.55-59
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    • 1979
  • Mass spectra of the dammarane triterpenes having open side chain and $C_{20}-C_{25}-epoxy$ side chain were measured. Principal fragment ions were assigned and plausible mechanisms for the formation of the fragment ions were proposed. In general, the triter-penoids of $C_{20}-C_{25}-epoxy$ side chain. produce $h_{1}-species$ fragment ions by the deletion of side chain at $C_{20}-C_{22}$ bond and open side chain triterpenoids produce $h_{2}$ species fragmentions whose mass numbers are higher by two mass unit than those of $h_{1}$ species. The mass number of h species fragment ions will serve as the diagnostic tool for the elucidation of side chain structure of tetracyclic triterpenoids.

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