Hye‐Ran Kim, Jisun Choi, Kang‐Hee Won,
Abstract Background DNA-free, clustered regularly interspaced short palindromic repeats (CRISPR)-associated protein (Cas) ribonucleoprotein (RNP)-based genome editing is a simple, convincing, and promising tool for precision crop breeding. The efficacy of designed CRISPR-based genome editing tools is a critical prerequisite for successful precision gene editing in crops. Results This study demonstrates that soil-grown leaf- or callus-derived pepper protoplasts are a useful system for screening of efficient ...
Tópico(s): RNA regulation and disease
2020 - BioMed Central | BMC Plant Biology
Seon‐Jin Choi, Kang Hee Ku, Bumjoon J. Kim, Il‐Doo Kim,
We propose a new route for transferring catalysts onto macroporous metal oxide nanofibers (NFs) using metallic nanoparticles (NPs) infiltrated block copolymer microparticles as sacrificial templates. Pt decorated polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) copolymer microparticles (Pt-BCP MPs), produced from oil-in-water emulsions, were uniformly dispersed within electrospun PVP/W precursor composite NFs. The macropore-loaded WO3 NFs (macroporous Pt-WO3 NFs), which are additionally functionalized ...
Tópico(s): Analytical Chemistry and Sensors
2016 - American Chemical Society | ACS Sensors
Suhee Choi, Hwakyeung Jeong, Kang-Hee Choi, Jae Yong Song, Jongwon Kim,
We report a simple one-step electrodeposition of triangular Pd rod nanostructures on clean Au substrates without additives. Scanning electron microscopy, transmission electron microscopy, and electrochemical techniques were utilized to characterize the structural features of the triangular Pd rod nanostructures. The regulation of the electrodeposition rate by optimizing the electrolyte concentration and applied potential was critical for the anisotropic growth of Pd in the vertical direction. The ...
Tópico(s): Electrochemical Analysis and Applications
2014 - American Chemical Society | ACS Applied Materials & Interfaces
... Kanij Rukshana Sumi, Sang Ki Choi, Kap Seong Choi, Kang Hee Kho Molecular Characterization of Carbonic Anhydrase II (CA ...
Tópico(s): Food Industry and Aquatic Biology
1990 - University of Chicago Press | The Journal of Geology
Jung Sug Hong, Hee Jung Kim, Chang Hwun Sohn, Oh Yeong Gong, Jin Hyuk Choi, Kang Hee Cho, Gill Sang Han, Ki Tae Nam, Hyun Suk Jung,
Pb contamination in aquatic environments causes severe pollution; therefore, harmless absorbents are required. In this study, we report a novel synthesis of whitlockite (WH, Ca 18 Mg 2 (HPO 4 ) 2 (PO 4 ) 12 ), which is the second most abundant biomineral in human bone, and its application as a high‐performing Pb 2+ absorbent. Hydroxyapatite (HAP) and WH are prepared via a simple precipitation method. The Pb 2+ absorption performance and mechanism of the synthesized biominerals are investigated in aqueous solutions ...
Tópico(s): Perovskite Materials and Applications
2022 - Wiley | Energy & environment materials
Zahid Parvez Sukhan, Md. Rajib Sharker, Yusin Cho, Shaharior Hossen, Kap Seong Choi, Kang Hee Kho,
Temperature has crucial effects on gonadal development and reproduction of abalone. To understand the impact of thermal stress on molecular and physiological processes triggering the regulation of reproduction, changes in the mRNA expression of neuroendocrine genes encoding two abalone gonadotropin-releasing hormone ( Hdh-GnRH , Hdh-GnRH-like peptide ), GnRH receptor ( Hdh-GnRH-R ), Hdh-APGWamide , serotonin receptor ( 5-HT hdh ), and a heat shock protein HSP70 were examined in ganglia and testis of male Pacific abalone ( ...
Tópico(s): Aquaculture Nutrition and Growth
2021 - Frontiers Media | Frontiers in Marine Science
Nag‐Choul Choi, Kang-Hee Cho, Min-Sung Kim, Seong‐Jik Park, Chang‐Gu Lee,
Ceramic membranes and ion exchangers are effective at removing turbidity and ionic contaminants from water, respectively. In this study, we demonstrate the performance of a hybrid ion-exchange fabric/ceramic membrane system to treat metal ions and turbidity at the same time in synthetic wastewater. The removal rate of As(V) and Zn(II) by the ceramic membrane increased with solution pH, while turbidity was completely removed regardless of the solution pH. The main reaction of As(V) removal was adsorption ...
Tópico(s): Fluoride Effects and Removal
2020 - Multidisciplinary Digital Publishing Institute | Applied Sciences
Md. Rajib Sharker, Zahid Parvez Sukhan, Soo Cheol Kim, Shaharior Hossen, Yusin Cho, Cheol Young Choi, Kang Hee Kho,
Gonadotropin-releasing hormone (GnRH) is a key hypothalamic neuropeptide regulating the reproductive function of vertebrates and invertebrates. In the present study, we report the role of GnRH in gamete cell proliferation of Pacific abalone, Haliotis discus hannai using BrDU incorporation, and analyzed the expression of reproductive responsive genes. In vivo injection of buserelin and H. discus hannai GnRH peptides (GnRH-I and GnRH-II) at doses of 250 and 500 ng/g BW resulted in a significant increases ...
Tópico(s): Hypothalamic control of reproductive hormones
2020 - Elsevier BV | Aquaculture
Md Abu Hanif, Shaharior Hossen, Yusin Cho, Zahid Parvez Sukhan, Cheol Young Choi, Kang Hee Kho,
Growth factors are mostly secreted proteins that play key roles in an organism’s biophysical processes through binding to specific receptors on the cell surface. The mollusk-like growth factor (MLGF) is a novel cell signaling protein in the adenosine deaminase-related growth factor (ADGF) subfamily. In this study, the MLGF gene was cloned and characterized from the digestive gland tissue of Pacific abalone and designated as Hdh-MLGF. The transcribed full-length sequence of Hdh-MLGF was 1829 bp long ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2022 - Multidisciplinary Digital Publishing Institute | Biology
Md. Rajib Sharker, Soo Cheol Kim, Shaharior Hossen, Kanij Rukshana Sumi, Sang Ki Choi, Kap Seong Choi, Kang Hee Kho,
Carbonic anhydrases (CAs) are universal zinc ion containing metalloenzymes that play a pivotal role in various physiological processes. In this study, a CA I (designated as Hdh CA I) was isolated and characterized from the mantle tissue of Pacific abalone, Haliotis discus hannai . The full-length cDNA sequence of Hdh CA I was 1,417-bp in length, encoding a protein of 337 amino acids with molecular weight of 37.58 kDa. Hdh CA I sequence possessed a putative signal peptide of 22 amino acids and a CA catalytic ...
Tópico(s): Environmental Toxicology and Ecotoxicology
2021 - Frontiers Media | Frontiers in Molecular Biosciences
Young‐Hyun Jo, Sung-Pil Kang, Tae-Ho Seo, Sung-Je Choi, Kang Hee Kho, Kazuyoshi Kuwano, Naotsune Saga, Min-Yong Kim, Jong‐Ahm Shin,
Cryopreservation of sporothalli of the red alga Porphyra (P.seriata, P. yezoensis, P. tenera, P. pseudolinearis and P. dentata) was performed by the two-step cooling method in liquid nitrogen.The algal samples were suspended in various cryoprotective solutions, and slowly cooled to -40°C in 4 hours using a programmed freezer.After the first slow cooling the suspensions with cryoprotectants were immediately immersed in liquid nitrogen.The suspension from the programmed freezer was thawed quickly by ...
Tópico(s): Turfgrass Adaptation and Management
2003 - Korean Society of Phycology | ALGAE
Md. Rajib Sharker, Zahid Parvez Sukhan, Kanij Rukshana Sumi, Sang Ki Choi, Kap Seong Choi, Kang Hee Kho,
Carbonic anhydrases (CAs) are a family of metalloenzymes that can catalyze the reversible interconversion of CO 2 /HCO 3 – , ubiquitously present in both prokaryotes and eukaryotes. In the present study, a CA II (designated as HdhCA II ) was sequenced and characterized from the mantle tissue of the Pacific abalone. The complete sequence of HdhCA II was 1,169 bp, encoding a polypeptide of 349 amino acids with a NH 2 -terminal signal peptide and a CA architectural domain. The predicted protein shared 98.57% ...
Tópico(s): Calcium Carbonate Crystallization and Inhibition
2021 - Frontiers Media | Frontiers in Molecular Biosciences
Yujun Choi, Kang-Hee Hong, Hyang‐Tag Lim, Jiwon Yune, Osung Kwon, Sang-Wook Han, Kyunghwan Oh, Yoon-Ho Kim, Yong‐Su Kim, Sung Moon,
We report investigation on quantum discord in classical second-order interference.In particular, we theoretically show that a bipartite state with D = 0.311 of discord can be generated via classical second-order interference.We also experimentally verify the theory by obtaining D = 0.197 ± 0.060 of non-zero discord state.Together with the fact that non-classicalities originated from physical constraints and information theoretic perspectives are not equivalent, this result provides an insight to understand ...
Tópico(s): Laser-Matter Interactions and Applications
2017 - Optica Publishing Group | Optics Express
Dong‐Han Lee, Youn‐Hee Choi, Kang-Hee Lee, Dae-Ryong Kang, Sun Ha Jee, Chung Mo Nam, Il Suh,
Objectives : The main objectives of this study are to identify the factors associated with hypertension control and to determine the influencing factors associated with antihypertensive therapy. Methods : The study was conducted on 107 subjects who participated in the 1999 and 2002 Gwacheon Study and who had had uncontrolled hypertension (systolic140 or diastolic 90mmHg) in 1999, We compared the characteristics of the controlled and uncontrolled hypertensive group and investigated the characteristics ...
Tópico(s): Health and Wellbeing Research
2003 - Korean Society for Preventive Medicine | Journal of Preventive Medicine and Public Health
Hyun Soo Ahn, Se Joong Kim, Jong Bo Choi, Seol Ho Choo, Kang Hee Shim, Sun Il Kim,
Objectives To analyse actual long‐term medical treatment of benign prostatic hyperplasia ( BPH ) and compare the incurred cost with that of patients with BPH who underwent early surgery. Patients and methods Patients who were first diagnosed with BPH from 1 January 2008 to 31 December 2010 were identified using the Clinical Data Warehouse. Hospital billing data generated by the electronic hospital management system were collected until December 2015. For outpatient care, only procedures, materials and ...
Tópico(s): Pelvic floor disorders treatments
2018 - Wiley | BJU International
Sunghak Park, Taehwan Jang, Seungwoo Choi, Yoon Ho Lee, Kang Hee Cho, Moo Young Lee, Hongmin Seo, Hyung‐Kyu Lim, Yujeong Kim, Jinseok Ryu, Sang Won Im, Min Gyu Kim, Ji‐Sang Park, Miyoung Kim, Kyoungsuk Jin, Sun Hee Kim, Gyeong‐Su Park, Hyungjun Kim, Ki Tae Nam,
The water oxidation reaction, the most important reaction for hydrogen production and other sustainable chemistry, is efficiently catalyzed by the Mn4CaO5 cluster in biological photosystem II. However, synthetic Mn-based heterogeneous electrocatalysts exhibit inferior catalytic activity at neutral pH under mild conditions. Symmetry-broken Mn atoms and their cooperative mechanism through efficient oxidative charge accumulation in biological clusters are important lessons but synthesis strategies ...
Tópico(s): Advanced battery technologies research
2023 - American Chemical Society | Journal of the American Chemical Society
Nag‐Choul Choi, Kang Hee Cho, Bong Ju Kim, Soonjae Lee, Cheon-Young Park,
Tópico(s): Minerals Flotation and Separation Techniques
2018 - Springer Science+Business Media | International Journal of Minerals Metallurgy and Materials
Shin Who Park, Ja Yeon Choi, Kang Hee Jung,
The great auricular nerve (GAN) is a sensory branch of the cervical plexus originating from the C2 and C3 nerve roots that innervates the external ear, mandibular angle, and parotid gland. Since idiopathic GAN neuralgia is a rare condition and branches of the GAN overlap with other cervical and cranial nerves, its diagnosis is challenging and can be confused with other facial neuralgias. This article describes the case of a 55-year-old woman with intractable unilateral periauricular and lateral head ...
Tópico(s): Oropharyngeal Anatomy and Pathologies
2018 - | Journal of Oral & Facial Pain and Headache
Seungwoo Choi, Mani Balamurugan, Kang‐Gyu Lee, Kang Hee Cho, Sunghak Park, Hongmin Seo, Ki Tae Nam,
A highly efficient CO2 electrolysis system could be created by introducing biomass oxidation as an alternative anodic reaction to the sluggish oxygen evolution reaction in a CO2-saturated and near-neutral electrolyte. Here, we successfully demonstrate anodic biomass oxidation by synthesizing 5 nm nickel oxide nanoparticles (NiO NPs). NiO NPs show a unique electrocatalytic activity for 5-hydroxymethylfurfural (HMF) oxidation under near-neutral conditions, exhibiting an anodic current onset (1 mA cm– ...
Tópico(s): Advanced battery technologies research
2020 - American Chemical Society | The Journal of Physical Chemistry Letters
Sunghak Park, Kyoungsuk Jin, Hyung‐Kyu Lim, Jin Kim, Kang Hee Cho, Seungwoo Choi, Hongmin Seo, Moo Young Lee, Yoon Ho Lee, Sangmoon Yoon, Miyoung Kim, Hyungjun Kim, Sun Hee Kim, Ki Tae Nam,
Abstract High-valent metal-oxo moieties have been implicated as key intermediates preceding various oxidation processes. The critical O–O bond formation step in the Kok cycle that is presumed to generate molecular oxygen occurs through the high-valent Mn-oxo species of the water oxidation complex, i.e., the Mn 4 Ca cluster in photosystem II. Here, we report the spectroscopic characterization of new intermediates during the water oxidation reaction of manganese-based heterogeneous catalysts and assign ...
Tópico(s): Catalytic Processes in Materials Science
2020 - Nature Portfolio | Nature Communications
Young Hwa Kim, A‐Rang Im, Bo-Kyung Park, Seung Ho Paek, Goya Choi, Yu Ri Kim, Wan Kyunn Whang, Kang Hee Lee, Seung-Eun Oh, Mi Young Lee,
Hibiscus syriacus L. (Malvaceae) is an important ornamental shrub in horticulture and has been widely used as a medical material in Asia. The aim of this study was to assess the antidepressant and neuroprotective effects of a root bark extract of H. syriacus (HSR) and to investigate the underlying molecular mechanisms. Using an animal model of restraint stress, we investigated the effects of HSR on depressive-like behaviors and on the expression levels of serotonin, corticosterone, and neurotrophic ...
Tópico(s): Ziziphus Jujuba Studies and Applications
2018 - Hindawi Publishing Corporation | BioMed Research International
Won Man Park, Dae Kyung Choi, Kyung‐Soo Kim, Sung Man Son, Se Hong Oh, Kang Hee Lee, Heung Seok Kang, Choengryul Choi,
Predicting the sloshing motion of a coolant during a seismic assessment of a rectangular spent fuel pool is of critical concern. Linear theory, which provides a simple analytical method, has been used to predict the sloshing motion in rectangular pools and tanks. However, this theory is not suitable for the high-frequency excitation problem. In this study, the authors developed a simple analytical method for predicting the sloshing motion in a rectangular pool for a wide range of excitation frequencies. ...
Tópico(s): Fluid Dynamics and Heat Transfer
2019 - Elsevier BV | Nuclear Engineering and Technology
Kang Hee Lee, Sang Tae Choi, Guen Young Lee, You‐Jung Ha, Sang‐Il Choi,
Axial spondyloarthritis (axSpA) is a chronic inflammatory disease of the sacroiliac joints. In this study, we develop a method for detecting bone marrow edema by magnetic resonance (MR) imaging of the sacroiliac joints and a deep-learning network. A total of 815 MR images of the sacroiliac joints were obtained from 60 patients diagnosed with axSpA and 19 healthy subjects. Gadolinium-enhanced fat-suppressed T1-weighted oblique coronal images were used for deep learning. Active sacroiliitis was defined ...
Tópico(s): Rheumatoid Arthritis Research and Therapies
2021 - Multidisciplinary Digital Publishing Institute | Diagnostics
Won Il Choi, Seungwoo Choi, Mani Balamurugan, Sunghak Park, Kang Hee Cho, Hongmin Seo, Heonjin Ha, Ki Tae Nam,
The electrochemical chlorine evolution reaction (CER) is one of the most important electrochemical reactions. Typically, iridium (Ir)- or ruthenium (Ru)-based mixed metal oxides have been used as electrocatalysts for the CER due to their high activities and durabilities. However, the scarcity of Ir and Ru has indicated the need to develop alternative earth-abundant transition-metal-based CER catalysts. In this study, we report a Co3O4 nanoparticle (NP) catalyst synthesized by a hydrothermal method. ...
Tópico(s): Advanced battery technologies research
2023 - American Chemical Society | ACS Omega
Min Ju Kim, Jin A Kim, Jin Ah Song, Kang Hee Kho, Cheol Young Choi,
Tópico(s): Animal Genetics and Reproduction
2023 - Elsevier BV | General and Comparative Endocrinology
Yoona Choi, Se Jin Park, Jong-Arm Jun, Cheol‐Sig Pyo, Kang Hee Cho, Hansung Lee, Jaehak Yu,
The emergence of an aging society is inevitable due to the continued increases in life expectancy and decreases in birth rate. These social changes require new smart healthcare services for use in daily life, and COVID-19 has also led to a contactless trend necessitating more non-face-to-face health services. Due to the improvements that have been achieved in healthcare technologies, an increasing number of studies have attempted to predict and analyze certain diseases in advance. Research on stroke ...
Tópico(s): ECG Monitoring and Analysis
2021 - Multidisciplinary Digital Publishing Institute | Sensors
Young Shin Lee, Kyung Joo Choi, Kang Hee Cho, Young Jin Choi, Hyun Kyoon Lim, Bong Ok Kim,
AFO is a device, which is usually recommended for hemiplegics to help their pathologic gait. To date, no good engineering guidance is available. We analyze mechanical characteristics of AFO and evaluate structural stability effect of thickness of ankle foot orthosis (AFO). The study is to provide a guidance to make a functional AFO. Basic material characteristics such as Young’s modulus and Possion’s ratio were measured through material tests. Finite element models were made and analyzed based on ...
Tópico(s): Cerebral Palsy and Movement Disorders
2006 - Trans Tech Publications | Key engineering materials
Byeong‐Joo Lee, Jin-Ju Kim, Kang-Hee Choi, Euichul Shin, Wan-Jun Kim, Sung–Man Lee, Goo‐Hwan Jeong,
We report direct growth of vertically aligned carbon nanotubes (VCNTs) on Cu foils using thermal chemical vapor deposition and present the feasibility of possible applications as anode materials in lithium ion batteries. The VCNTs were vertically standing on the Cu foils which were covered with catalytic iron and alumina buffer layers. The growth temperature was 725°C and acetylene under atmospheric pressure was used as a hydrocarbon source. The VCNT grown had mean diameter of 5.8 nm and showed electrical ...
Tópico(s): Carbon Nanotubes in Composites
2010 - World Scientific | Surface Review and Letters
Young-Shin Lee, Youngjin Choi, Hyunsoo Kim, Hyun-Seung Lee, Kang Hee Cho,
The ankle foot orthosis (AFO) is used as the gait assistive tool for hemiplegic patients. The structural characteristics of the AFO are applied to the state of the patient. However, the prescription guide for hemiplegic patients is not well established. The purpose of this study is to develop design guide to find out the structural characteristics of polypropylene of AFO used for hemiplegics. In this study, the rigidities of dorsiflexion and plantarflexion of the AFO with varied types of ankle widths ...
Tópico(s): Diabetic Foot Ulcer Assessment and Management
2006 - World Scientific | International Journal of Modern Physics B
Dae Jong You, Seon‐Ah Jin, Kang Hee Lee, Chanho Pak, Kyoung Hwan Choi, Hyuk Chang,
Ir-decorated PdCu alloy catalyst on carbon support (Ir–PdCu/C) is prepared via two-step procedure, which consists of polyol process for PdCu alloy nanoparticle supported on carbon support followed by surface replacement reaction step by Ir ions. The structure of nanoparticles is characterized by ICP-AES, XRD, and TEM-EDX. The electrochemical surface area (ECSA) and activity for oxygen reduction reaction (ORR) of Ir–PdCu/C catalyst are larger and higher than those of PdCu/C catalyst, respectively. Furthermore, ...
Tópico(s): Advanced battery technologies research
2011 - Elsevier BV | Catalysis Today