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김유진,정귀재,공성호,신장순,윤길상,정우철,김건희,서태일,Kim, Yu-Jin,Jung, Gui-Jae,Gong, Sung-Ho,Shin, Jang-Soon,Yoon, Gil-Sang,Jung, Woo-Chul,Kim, Gun-Hee,Seo, Tae-Il 한국금형공학회 2008 한국금형공학회지 Vol.2 No.6
Recently, the demand of high-productivity injection mold increases since the consumption of packaging grows in the world. Stack mold is composed of more than two molds and it has very high productivity and economic efficiency. In advanced country, stack mold which has was developed already but, in occasion of domestic mold industry, there is no study of stack mold. In this study, die and mold of in-mold labeling was developed for securing the technique of manufacturing high-productivity mold.
꼬마모자반(Sargassum nipponicum)에서 유래한 유효성분의 최종당화산물에 의한 당뇨병성 신경병증 완화 효과
조치홍,유귀재,김민경,올파드위,정영성,이상훈 한국키틴키토산학회 2023 한국키틴키토산학회지 Vol.28 No.2
Advanced glycation end-products (AGEs) are compounds naturally produced in the body during the glycation reaction. Excessive AGEs bind to long-lived proteins such as collagen and accumulate in the body, leading to AGEsrelated diabetic complications. This study aimed to evaluate the anti-glycation ability and neuroprotective effect of 4- hydroxybenzaldehyde (4-HBA), 3-hydroxybenzaldehyde (3-HBA), and 2,5-dihydroxyphenylacetic acid (homogentisic acid; HGA) isolated from Sargassum nipponicum. The results confirmed that 4-HBA, 3-HBA, and HGA effectively inhibit the production of AGEs, prevent AGEs-collagen cross-link formation, and cleave pre-formed cross-links between AGEs and collagen, thereby exhibiting anti-glycation properties. Treatment with methylglyoxal (MGO) resulted in increased neuronal PC-12 cell death, intracellular reactive oxygen species production, and intracellular accumulation of MGO and AGEs. However, pretreatment with 4-HBA, 3-HBA, and HGA reduced AGEs production by suppressing MGO accumulation in neuronal PC-12 cells, which consequently lowered intracellular oxidative stress levels and exerted a neuroprotective effect. Notably, HGA exhibited a stronger binding affinity to the receptor for AGEs (RAGE) protein compared to MG-H1 and competitively inhibited AGEs-RAGE interaction, effectively downregulating RAGE protein expression in neuronal PC-12 cells. These findings highlight the chemical and structural properties of HGA derived from S. nipponicum, which effectively target the main mechanisms involved in AGEs-induced diabetic neuropathy. Therefore, HGA holds significant potential as a natural treatment for inhibiting AGEs formation.
신장순,김유진,정귀재,황순환,허영무,윤길상,정우철,서태일,Shin, Jang-Soon,Kim, Eu-Jin,Jung, Gui-Jae,Hwang, Soon-Hwan,Heo, Young-Moo,Yoon, Gil-Sang,Jung, Woo-Chul,Seo, Tae-Il 한국금형공학회 2008 한국금형공학회지 Vol.2 No.3
In recent, the demand of high-productivity injection mold is increased because of the growth of international packaging market which is induced by an increase of population. The increase of productivity leads to the large-capacity injection molding machine and peripheral devices. For solving this problem, the stack mold which is based on the exsiting machine and device has researched in advanced countries actively. In this paper, as the preliminary research of stack mold development, the stack mold which has 2 level ${\times}4$ cavity was designed and fabricated. Besides, the motion and structural analysis were performed to verify the stability of developed stack mold.
신장순(J. S. Shin),황순환(S. H. Hwang),김유진(Y. J. Kim),정귀재(K. J. Jung),허영무(Y. M. Heo),윤길상(G. S. Yoon) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Recently, the demand of high-productivity injection mold increases since the consumption of packaging grows in the world. Stack mold is composed of more than two molds and it has very high productivity and economic efficiency. In advanced country, stack mold which has 4Level×96 cavity was developed already but, in occasion of domestic mold industry, there is no study of stack mold. In this study, stack mold which has 2Level×4cavity is developed for securing the technique of manufacturing high-productivity mold.