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정재연(Jaeyoun Jung),신현일(Hyuni1 Shin),백일현(Ilhyun Beak),조인성(Ihnsung Cho),송규근(Kyukeun Song),오석형(Seokhyung Oh),정용욱(YongWook Jung) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.6
Recently, noise and vibration by roller bearing brings trouble to pass in need to more speedy rotating and light weight, high durability in rotating system. For distinction clearly of appropriateness of roller bearing element, the effect of total system necessaries sure understanding under the motion condition. But, although roller bearing is used extensively, the related researches in this field are extremely limited. Therefore, attempts have been made to calculate film thickness, pressure distribution throughout the analysis of elastohydrodynamic lubrication, and contribute to high efficiency and performance improvement of bent-axis type piston pump throughout the close examination of lubrication characteristics between roller and inner race of roller bearing in this paper.
A Simple and Facile Screening Method to Discover the Plastic Degrading Microorganisms
Giyoung SHIN,Hyuni JUNG,Sung Yeon HWANG,Jeyoung PARK,Dongyeop X. OH 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
The current decomposition rate of biodegradable plastics cannot satisfactorily curb the global plastic waste crisis. Thus, identifying efficient plastic-digesting microorganisms is necessary to accelerate the decomposition of plastics. However, screening for these microorganisms is labor-intensive and time-consuming. The distribution of hydrophobic plastics homogeneously, with a high surface area and cell accessibility, in a culture medium is challenging. Herein, a high-throughput, straightforward micro-spray-based screening system is presented. Plastic microparticles are sprayed on an agar plate, thereby providing a translucent screening plate. This method is rapid, as opposed to the tedious, intricate, and skilled preparation required for polymer emulsion. Micro-sprayed plastic samples require a minimal effective dose (15 ㎎) and share a large interface with microorganisms. The plastic-degrading activity of microbes results in a transparent clear zone around the colony, thereby being readily recognizable. Our method can accelerate the discovery of novel plastic-degrading microorganisms and be applied to future studies on the decomposition of non-degradable plastics.