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홍현기,유지수,민진욱,차상호,이종찬 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Development of bio-plastic synthesis have garnered many researchers' attention to turn the chemical plastic polymers into biocompatible plastics, such as using biologic enzymes for manufacturing, or using eco-friendly biomass as base materials. Regarding that above mentioned, poly(Lactic acid) (PLA) has received much attention such in food chemistry, electronics, and car industries due to biocompatibility, biodegradability, and/or non-toxicity. In this research, poly(L-lactide)(PLLA)s were synthesized, composed of L-lactide via bulk ring-opening condensation polymerization with a series of the mixtures of metal-based catalysts. The effect of metal oxide as a co-catalyst to molecular weights of polymers, and the effect of shape of the Zinc oxide (ZnO) nanoparticle catalyst as initiator/co-catalyst in the ring-opening polymerization will be given in the meeting.
유세포 분석기와 Neutral Red Retention Assay를 이용한 자연산 참굴(Crassostrea gigas)의 면역력 측정
홍현기,강현실,김영옥,최광식 한국해양과학기술원 2012 Ocean and Polar Research Vol.34 No.2
Hemocyte parameters of the wild Pacific oyster Crassostrea gigas inhabiting intertidal zones in small bays (Gwangyang and Jinhae Bay) on the southern coast of Korea were evaluated using flow cytometry and neutral red retention (NRR) assay. Morphological features, cell count, mortality, DNA damage, phagocytosis, and lysosomal membrane stability of hemocytes were analyzed. Three types of hemocytes were identified in the oyster hemolymph: granulocytes, hyalinocytes, and blast-like cells. Immune related functions of hemocyte including phagocytosis and lysosomal membrane stability were significantly different among the study areas (P<0.05), while cell count, mortality, and DNA damage of hemocytes were not significantly different. In Gwangyang Bay, phagocytosis of granulocytes and lysosomal membrane stability of oyster hemocytes inhabiting inside bay were significantly lower than those of oyster hemocytes in outside bay (P<0.05), indicating that oysters in inside bay of Gwangyang were relatively suppressed the immunological function in hemocytes. Contrary to Gwangyang Bay, immune parameters of oyster hemocytes in Jinhae Bay not showed the difference between sampling sites. In conclusion, flow cytometry and NRR assay using oyster hemocyte has a powerful tool to investigate the cell level in a short time due to no-preprocessing of material.
객체지향적인 정보 분석에 관한 연구 : Modellierung
홍현기 韓獨經商學會 1998 經商論叢 Vol.16 No.1
Zur Zeit versuchen alle Firma, ihre Geschaeftsprozesse zu restrukturieren, um schell aendereden Marketsituation zu konfrontieren. Fuer solchen Zweck sind die Entwicklung einer Methode fuer Datenstrukturanalyse und ihre genauere Beschreibungstechniken der Mitelpunkt der Informationsystem geworden. Das Objektorientierten Ansatz ist eine Moeglichkeit vondieser Methode feur Datenstrukturanalyse. In dieser Arbekt werden verschiedene Methode behandelt, und verglichen, welche Unterschiede unter den solchen Methode besteht. Das in dieser Arbeit angegebene Datenstrukturanalyse-verfahren mit oejektorientiertem Ansatz wurde bei mehreren Projekten angewandt., und fuehrt zu den geweunschten Ergebnis. Aufgrund einer vorgeschalteten Ist-Analyse koennen die betrachtende Geschaeftsprozesse ausreichend genau abgegrenzt und essentiellen Geschaeftsprozess-Funktionen klar definiert werden. Insgesammt kann der objektorientierten Ansatz aufgrund seiner konsistenten Anwendbarkeit im Zusammenhag mit der Geschaeftsprozess-Modellierung ein Hilfsmittel angesehen werden.
해양독소를 보유한 연체동물의 기관별 명칭과 생태학적 특성에 관하여
홍현기,Nobuhisa Kajino,김현중,이완옥,이지현,최광식 한국식품위생안전성학회 2021 한국식품위생안전성학회지 Vol.36 No.6
이 총설에서는 해양 연체동물 내 독소 분석을 하는 연구자들의 이해를 돕기 위하여, 국내에서 생산되거나 유통 되는 수산물 중 해양 생물독소에 오염될 수 있는 이매패류와 복족류 종들의 공식 명칭과 생태학적 특성을 소개하 였다. 또한 대표적인 생물군의 해부도를 통한 각 기관들의 위치와 공식적인 명칭을 알리고자 하였다. 향후 해양 생물독소 분석 관련 식품공전, 학술논문 및 보고서에 실험생물의 정확한 종명과 분석 기관의 명칭에 대한 통일 및 규격화가 필요하다. In order to aid the researchers who analyze the biotoxins in marine molluscs, this paper introduces the official names and ecological characteristics of the domestically produced or distributed bivalve and gastropods that can be contaminated with marine biotoxins. Also, the paper intends to inform the location and scientific name of each organ of the representative group of species through anatomical maps. In the future, it is necessary to standardize and normalize the names of the species and the research institutions in food codes, scholarly papers and reports on the marine biotoxin analysis.