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Choi,One-Kyun,Kim,Yong-Seong,Yu,Hye-Kyoung,Lee,Chan,Bang,Hyo-Pil,Yang,Deok-Chun,Kim,Young-Kee 한국자원식물학회 2003 Plant Resources Vol.6 No.1
In this study, as preliminary research for the development of natural estrogen supplement the chemical properties of Iranian black pomegranate juice concentrate and seeds were evaluated. Proximate compositions of pomegranate juice concentrate and seeds were as follows; crude lipid 0.4% and 8.2%, moisture 39.9% and 6.6%, crude protein 0.9% and 12.2%, ash 1.4% and 1.7%, and carbohydrate 42.0% and 84.5% respectively. Major amino acids are glutamic acid (1310.0ppm) and aspartic acid (896.2ppm) in juice concentrate, and glycine (611.1ppm) and arginin (401.6ppm) in seeds. Ascorbic acid has the highest concentration of 20.0mg/l00g in juice concentrate and 0.23mg/l00 in seeds. The compositions of unsaturated fatty acids such as linoleic acid and linolenic acid were higher than those of saturated fatty acids such as stearic palmitic acid. Major minerals were potassium, calcium and sodium, potassium was highest in both juice concentrate and seeds. Vitamins were composed of ascorbic acid (20.0mg/l00g), vitamin B$_1$ 수식 이미지(0.12mg/100g) and niacin (0.80mg/l00g) in juice concentrate, and only ascorbic acid(0.23mg/l00g) in seeds. Organic acids such as citric and L-malic acid were detected only in pomegranate juice concentrate. The contents of total polyphenols were 4.55g/L in juice concentrate and 3.5mg/l00g in seeds, respectively. Phytoestrogens detected in pomegranate juice concentrate and seeds were daidzein, quercetin, genistein and 17β-estradiol.
Risk of lymphadenopathy from SARS-CoV-2 vaccination in Korea: a self-controlled case series analysis
Mi-Sook Kim(Mi-Sook Kim),Bongyoung Kim(Bongyoung Kim),Jeong Pil Choi(Jeong Pil Choi),Nam-Kyong Choi(Nam-Kyong Choi),Jung Yeon Heo(Jung Yeon Heo),Jun Yong Choi(Jun Yong Choi),Joongyub Lee(Joongyub Lee) 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: To assess the risk of lymphadenopathy following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination. METHODS: A self-controlled case series design was used to determine whether the risk of lymphadenopathy was higher in the 1-day to 42-day risk interval after coronavirus disease 2019 (COVID-19) vaccination compared to the control period. In addition, subgroup analyses were conducted according to baseline characteristics, time since vaccination, and sensitivity analyses adjusted for the length of the risk interval. RESULTS: The risk of developing lymphadenopathy in the risk interval (1-42 days) after COVID-19 vaccination compared to the control period was significantly increased, with a relative incidence (RI) of 1.17 (95% confidence interval [CI], 1.17 to 1.18) when the first, second, and third doses were combined. The RI was greater on the day of vaccination (1.47; 95% CI, 1.44 to 1.50). In subgroup analyses by baseline characteristics, a significantly increased risk or trend toward increased risk was observed in most subgroups except for those aged 70 years and older, with a significant increase in risk in younger individuals, those with a Charlson’s comorbidity index <5, and those who received mRNA vaccines (mRNA-1273>BNT162b2). Within the 1-day to 42-day post-dose risk period, the relative risk was highest during the 1-day to 7-day post-dose period (1.59; 95% CI, 1.57 to 1.60) compared to the control period, and then the risk declined. In the sensitivity analysis, we found that the longer the risk window, the smaller the RI. CONCLUSIONS: SARS-CoV-2 vaccination is associated with a statistically significant increase in the risk of lymphadenopathy, and this risk was observed only with mRNA vaccines.
Choi, Young-Pil,Ha, Seung-Yeal,Jung, Jinwook,Kim, Jeongho Institute of Physics and the London Mathematical S 2019 Nonlinearity Vol.32 No.5
<P>We study a global dynamics of the thermomechanical Cucker–Smale (TCS) particles immersed in incompressible viscous fluid. For this, we use a coupled system consisting of kinetic TCS equation for particles and incompressible Navier–Stokes for fluid via a drag force in three dimensions. We first show the global existence of weak solutions for large data, and then establish the global existence and uniqueness of strong solutions under a smallness assumption on the initial data. We also provide <I>a priori</I> estimate of large-time behavior of strong solutions which exhibits an exponential alignment between TCS particles and fluid asymptotically.</P>
Choi, Eun-Young,Kim, Pil-Joo,Jazbinsek, Mojca,Kim, Jong-Taek,Lee, Yoon Sup,Gü,nter, Peter,Lee, Soon W.,Kwon, O-Pil American Chemical Society 2011 Crystal Growth & Design Vol.11 No.7
<P>We investigate a novel nonlinear optical nitrophenylhydrazone (NPH) crystal, 3,4,5-trimethoxybenzaldehyde-4-nitrophenylhydrazone (TMO-NPH). Compared with many acentric NPH crystals having rod-shaped heads reported previously, the TMO-NPH molecule maintains the acentric intermolecular hydrogen bond synton through hydrazone and nitro groups but has distinct space filling characteristics due to a different shape of the headgroup, the disk-shaped trimethoxybenzaldehyde. We investigated the crystal structure and its characteristics, as well as details of the microscopic and the macroscopic nonlinear optical properties by quantum chemical calculations using density functional theory (DFT) and powder second-harmonic generation at nonresonant conditions. For comparison, DA-NPH (4-dimethylaminobenzaldehyde-4-nitrophenylhydrazone) having a rod-shaped head and known nonlinear optical properties is also investigated by the same analysis. TMO-NPH crystals have the monoclinic space group symmetry <I>Pn</I> and exhibit a large macroscopic optical nonlinearity due to a favorable molecular packing with a very high order parameter cos<SUP>3</SUP>(θ<SUB>p</SUB>) = 0.90, while DA-NPH exhibits a lower order parameter cos<SUP>3</SUP>(θ<SUB>p</SUB>) = 0.33. The diagonal effective hyperpolarizability tensor component of TMO-NPH crystals is 30% higher than the largest tensor component of DA-NPH, even though the microscopic molecular susceptibility of TMO-NPH molecule is only about half of the one of DANPH.</P><P>Novel nonlinear optical NPH (nitrophenylhydrazone) crystals with the disk-shaped trimethoxybenzaldehyde group exhibit 30% higher diagonal effective hyperpolarizability tensor component than the largest tensor component of analogous NPH crystals with the rod-shaped 4-dimethylaminobenzaldehyde group, due to a favorable noncentrosymmetric molecular packing with a very high order parameter.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2011/cgdefu.2011.11.issue-7/cg200320f/production/images/medium/cg-2011-00320f_0007.gif'></P>
Choi, Pil-Son,Lee, Soo-Young,Chug, Hwa-Jee,In, Dong-Soo,Choi, Dong-Wook,Liu, Jang Ryol 한국식물학회 2003 Journal of Plant Biology Vol.46 No.2
Hypocotyl explants from 22 cultivars of Catharanthus roseus were cultured on various shoot-inducing media to assess their competence for adventitious shoot formation. The Murashige and Skoog (MS) media had been supplemented with 14 μM zeatin and 2.5 μM indole-3-butyric acid (IBA), 4.5 μM BA and 0.5 μM a-naphthaleneacetic acid (NAA), or 14 μM thidiazuron and 2.5 μM IBA. After eight weeks, the explants from 'Cooler Raspberry Red' showed the greatest frequency of adventitious shoot formation, followed by 'Cooler Orchid' and 'Cooler Treated'. The highest frequency (86.7%) for 'Cooler Raspberry Red' was attained on the mediμM enhanced with 14 μM zeatin and 2.5 μM NAA. Excised adventitious shoots were then readily rooted on a half-strength MS basal mediμM. Afterward, the regenerated plantlets were transferred to potting soil and grown to maturity in a greenhouse.
Sediment Toxicity of Industrialized Coastal Areas of Korea Using Bioluminescent Marine Bacteria
Choi, Min-Kyu,Kim, Seong-Gil,Yoon, Sang-Pil,Jung, Rae-Hong,Moon, Hyo-Bang,Yu, Jun,Choi, Hee-Gu The Korean Society of Fisheries and Aquatic Scienc 2010 Fisheries and Aquatic Sciences Vol.13 No.3
The quality of marine sediments from the industrialized coastal areas of Korea (Ulsan Bay, Masan Bay, and artificial Lake Shihwa) was investigated using a bacterial bioluminescence toxicity test. Sediment toxicity results were compared with the levels of chemical contamination (trace metals, organic wastewater markers, acid volatile sulfides, total organic carbon). Effective concentration 50% (EC50) of sediments ranged from 0.014 to 1.126 mg/mL, which is comparable to or lower than values in contaminated lakes, rivers, and marine sediments of other countries. Sediment reference index (SRI) ranged from 13 to 1044, based on the EC50 of the negative control sample. Mean average SRI values in Masan Bay and Lake Shihwa were approximately 8 and 9 times as high as that in Ulsan Bay, indicating higher sediment toxicity and greater contamination in the two former regions. Sediment toxicity were strongly associated with the concentrations of some chemicals, suggesting that this test may be useful for determining potential chemical contamination in sediments.
A review: methane capture by nanoporous carbon materials for automobiles
Pil-Seon Choi,Ji-Moon Jeong,Yong-Ki Choi,Myung-Seok Kim,Gi-Joo Shin,Soo-Jin Park 한국탄소학회 2016 Carbon Letters Vol.17 No.-
Global warming is considered one of the great challenges of the twenty-first century. In order to reduce the ever-increasing amount of methane (CH4) released into the atmosphere, and thus its impact on global climate change, CH4 storage technologies are attracting significant research interest. CH4 storage processes are attracting technological interest, and methane is being applied as an alternative fuel for vehicles. CH4 storage involves many technologies, among which, adsorption processes such as processes using porous adsorbents are regarded as an important green and economic technology. It is very important to develop highly efficient adsorbents to realize techno-economic systems for CH4 adsorption and storage. In this review, we summarize the nanomaterials being used for CH4 adsorption, which are divided into non-carbonaceous (e.g., zeolites, metal-organic frameworks, and porous polymers) and carbonaceous materials (e.g., activated carbons, ordered porous carbons, and activated carbon fibers), with a focus on recent research.