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Nayoon Choi,Yeongkyun Son,Tae-Hyun Kim,Yuri Park,Yuhoon Hwang 대한환경공학회 2023 Environmental Engineering Research Vol.28 No.2
In this study, the properties and adsorption behaviors of organoclays synthesized with two structurally different surfactants having the same carbon chain length (hexadecyltrimethylammonium bromide (HDTMAB) and benzyldimethylhexadecylammonium chloride (BDHAC)) were evaluated. The structural properties of the synthesized organoclays were examined using Fourier-transform infrared spectroscopy, zeta potential analysis, X-ray diffraction, and N2 adsorption-desorption test. The modified clays with increased surfactant loadings (from 0.5 CEC to 3 CEC) were prepared to find the optimal surfactant loading. As a result, 1.5 cation exchange capacity (CEC) was found to be the optimal surfactant loading. The organoclay prepared using HDTMAB (H-Bt) exhibited the maximum adsorption capacity of 114.3 ㎎/g for anionic Orange G dye, which was 1.74 times higher than that of the organoclay prepared using BDHAC (B-Bt). Furthermore, in the presence of a mixture of cationic and anionic dye molecules in water, H-Bt tended to remove more of the cationic target compound than B-Bt (i.e., methylene blue (MB)), suggesting that H-Bt can serve as a more efficient adsorbent for the uptake of environmental contaminants in practical scenarios. Moreover, this study examined the effects of surfactant molecules on the structural properties of organoclays and their adsorption behaviors in the uptake of dye molecules.
KVM 가상화 환경에서 워크로드 유형 기반 자원 격리 기법을 이용한 동적 자원 관리자
황나윤 ( Nayoon Hwang ),송충건 ( Chunggeon Song ),이미현 ( Mihyeon Lee ),최희석 ( Heeseok Choi ),유헌창 ( Heonchang Yu ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.1
최근 중앙 집중화된 대규모 클라우드 시스템의 증가로 인해 가상화 환경에서 수행되는 성능 최적화 작업에 대한 많은 연구가 진행되고 있다. 그러나 기존 연구에서는 자원 분배의 공정성을 위해 가상머신 단위로 컴퓨팅 자원을 격리한 정책 내에서 이루어지고 있어 유연한 자원관리에 한계를 가지고 있다. 본 연구에서는 워크로드의 특징을 기반으로 과학적 연산을 수행하는 가상머신과 일반적인 서비스를 수행하는 가상머신을 분류하여 성능 최적화 작업을 수행하는 동적 자원 관리자를 제안한다. 실험을 통하여 제안하는 동적 자원 관리자가 KVM 기본 스케줄링에 비해 49%의 성능 향상을 보였다.
Jongsoo CHOI,Nayoon KIM,Min-Kyu PARK,Jong-In WON 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Elastin-like polypeptides (ELPs) are stimulus-responsive protein-based biopolymers and some ELP block copolymers exhibit the temperature-triggered self-assembly into a micelle. In this study, triblock ELPs that contain a hydrophobic block, a hydrophilic block, and a metal binding block were examined. The construction of hydrophobic-core micelles.and the physical property changes during the micelle formation were investigated. These spherical nanoparticles were observed to be stable by hydrophobic interactions and subsequently to form a hydrogel when zinc ion was added. These hydrogels exhibited unique rheological behavior and viscoelastic properties. It is anticipated that these hydrogels with enhanced mechanical properties have potential in a variety of biomedical applications.
Converting a Host Receptor into Sustained Intranasal Virucides against SARS-CoV-2 Using Nanodiscs
Jaehyeon HWANG,Wonbeom PARK,Soomin KIM,SeungJoo KIM,Suhyun KIM,Nayoon CHOI,Eunkhang PARK,Hwanju KIM,Mina KIM,Hyunjoo CHOO,Soyun CHOI,MinKyeom KIM,YeonJin CHO,Dae-Hyuk KWEON 한국생물공학회 2023 한국생물공학회 학술대회 Vol.2023 No.10