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A Cultural Understanding Class Model for Underachievers in Elementary English
Joo Hye yeong 한국초등영어교육학회 2014 KAPEE International Conference Vol.2014 No.-
Lately, teachers and the local offices of Education have been showing an increased interest in factors and solutions for underachievers in elementary English classes. This year, Gyeonggi office of Education started a new program called 365 tutoring program for alienated and underachieving students. Moreover, teachers in local schools have been making lots of effort for help underachievers. This study, a cultural understanding class model for underachievers is along the same line. The purpose of this study is to examine the development of a cultural understanding class model for underachievers in elementary English and its application to an after school English program. It should be noted that this study was conducted on 10 underachieving students and with limited conditions. However, the two kinds of cultural understanding models and some other ideas which are based on Moran s cultural experimental learning model can be adapted for intermediate and advanced students in virtually every case.
Thermal Process for Enhancing Mechanical Strength of PLGA Nanoparticle Layers on Coronary Stents
Joo, Jae-Ryang,Nam, Hye-Yeong,Nam, So-Hee,Baek, In-Su,Park, Jong-Sang Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.9
Poly (lactic-co-glycolic acid) (PLGA) nanoparticles loading paclitaxel have been deposited on coronary stents by self-assembling properties of colloidal particles. The layers of the nanoparticles were enhanced to a sufficient mechanical strength by a thermal process under the proper temperature and humidity conditions. In vitro release studies proved the controlled paclitaxel release of the nanoparticle layers. This technique gives rise to a new range of applications for nanoparticles and drug-eluting stents.
Selective extraction of glutaric acid from biological production systems using n-butanol
Yeong-Hoon Han,Ye-Lim Park,Soo-Yeon Yang,Hye-Rim Jung,Jeong Chan Joo,Bong-Keun Song,Sang Hyun Lee,Kyungmoon Park,Jung-Oh Ahn,Yung Hun Yang 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.82 No.-
Glutaric acid has numerous industrial applications and it could be used as a polymer building block. Glutaric acid can be produced by chemical or biological methods. Although the biological production ofglutaric acid has attracted considerable attention, there are few effective and economical processes forrecovering glutaric acid from water based systems. Herein, we investigated the selective extraction ofglutaric acid via physical extraction using nine different solvents compared with trioctylamine/toluene asthe reactive extraction, which is the only reported method for recovering glutaric acid from biologicalproduction systems. Comparisons of the extraction yield, purity, linear solvation energy relationshipbetween the solvents, and reactant selectivity revealed n-butanol to be a suitable solvent for theextraction of glutaric acid, with a high extraction yield and selectivity obtained in less than 30 min underoptimized conditions. Furthermore, repetitive extraction allowed 98.4% of glutaric acid to be extractedfrom the aqueous phase with high solvent recovery and high purity, making this method suitable forpractical application.