113 results on '"Hye Ji Kim"'
Search Results
2. Differential dynamics of cullin deneddylation via COP9 signalosome subunit 5 interaction
- Author
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Yeong-Mu Kim, Hye-Ji Kim, Dong-Kyu Kim, Dong-Hyun Jung, Hyo Je Cho, Sangjune Kim, Jihoon Nah, and Sang-Min Jang
- Subjects
Cell Nucleus ,COP9 Signalosome Complex ,Ubiquitin ,Proteolysis ,Biophysics ,Cell Biology ,Cullin Proteins ,Molecular Biology ,Biochemistry - Abstract
Cullin-RING E3 ubiquitin ligases (CRLs) spatiotemporally regulate the proteasomal degradation of numerous cellular proteins involved in cell cycle control, DNA replication, and maintenance of genome stability. Activation of CRLs is controlled via neddylation by NEDD8-activating, -conjugating, and -attaching enzymes to the C-terminus of scaffold cullins (CULs), whereas the COP9 signalosome (CSN) inactivates CRLs via deneddylation. Here, we show that the deneddylation rate of each CUL is differentially modulated. Dose- or time-dependent treatment with pevonedistat, a small molecule inhibitor of NEDD8-activating enzyme (NAE), rapidly inhibits neddylation in most CULs, including CUL1, CUL3, CUL4A/B, and CUL5, whereas the deneddylation of CUL2 is slowly increased. We revealed that the different deneddylation speeds of each CUL depend on its binding strength with CSN5, the catalytic core of the CSN complex. Immunoprecipitation analysis revealed that CUL2 has a lower binding affinity for CSN5 than other CULs. Consistently, released cells treated with CSN5 inhibitor showed that CUL2 was slowly converted to the deneddylated form compared to the rapid deneddylation of other CULs. These findings provide mechanistic insights into the different dynamics of CULs in neddylation-deneddylation conversion.
- Published
- 2022
3. Why Do Eastern North Pacific Hurricanes Intensify More and Faster than Their Western-Counterpart Typhoons with Less Ocean Energy?
- Author
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Il-Ju Moon, Thomas R. Knutson, Hye-Ji Kim, Alexander V. Babanin, and Jin-Yong Jeong
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Atmospheric Science - Abstract
Tropical cyclones operate as heat engines, deriving energy from the thermodynamic disequilibrium between ocean surfaces and atmosphere. Available energy for the cyclones comes primarily from upper-ocean heat content. Here, we show that eastern North Pacific hurricanes reach a given intensity 15% faster on average than western North Pacific typhoons despite having half the available ocean heat content. Eastern North Pacific hurricanes also intensify on average 16% more with a given ocean energy (i.e., air–sea enthalpy flux) than western North Pacific typhoons. As efficient intensifiers, eastern Pacific hurricanes remain small during their intensification period, tend to stay at lower latitudes, and are affected by relatively lower vertical wind shear, a colder troposphere, and a drier boundary layer. Despite a shallower warm upper-ocean layer in the eastern North Pacific, average hurricane-induced sea surface cooling there is only slightly larger than in the western North Pacific due to the opposing influences of stronger density stratification, smaller size, and related wave-interaction effects. In contrast, western North Pacific typhoons encounter a more favorable oceanic environment for development, but several factors cause typhoons to greatly increase their size during intensification, resulting in a slow and inefficient intensification process. These findings on tropical cyclones’ basin-dependent characteristics contribute toward a better understanding of TC intensification.
- Published
- 2022
4. A Comparative Study on Cash-for-Care Regulatory Policies of Long Term Care System Amongst Germany, Sweden and the UK
- Author
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Hye Ji Kim, Young Choi, and Nam Yeon Kim
- Published
- 2022
5. Comparison of Tropical Cyclone Wind Radius Estimates between the KMA, RSMC Tokyo, and JTWC
- Author
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Hye-Ji Kim, Il-Ju Moon, and Imyong Oh
- Subjects
Atmospheric Science - Abstract
This study compared estimates of gale-force wind radii (R30 or R34) and storm-force wind radii (R50) of tropical cyclones (TC) by three agencies—the Korea Meteorological Administration (KMA), the Regional Specialized Meteorological Center (RSMC) Tokyo, and the Joint Typhoon Warning Center (JTWC)—in the western North Pacific during 2015–2018 and investigated the characteristics of these estimates. The results showed that the KMA’s R30 and R50 estimates were smaller (38% and 29%, respectively) than those of the RSMC Tokyo, and larger (11%) for R30 and smaller (12%) for R50 than those of the JTWC. The differences between these agencies seem to be largely determined by whether the agency estimates wind radii based only on a TC’s own winds or on TC winds combined with other mid-latitude synoptic systems to make TC warnings more comprehensive. The former is mainly the practice of the KMA and JTWC, whereas the latter is mainly the practice of the RSMC Tokyo. The factors considered for estimating wind radii also differ between the agencies: the KMA heavily relies on TC intensity—the higher the intensity, the larger the radius—while the RSMC Tokyo and JTWC rely less on TC intensity than the KMA but additionally consider the latitude and storm translation speed in their estimations. In particular, the TC translation speed considered by the RSMC Tokyo and JTWC explains why their estimated wind radii exhibit, on average, greater asymmetries (i.e., greater differences between the longest and shortest radii) than those estimated by the KMA. The findings of agency-dependent characteristics of TC wind radius data help to better determining and understanding the TC impact areas for TC risk reduction and management.
- Published
- 2022
6. Magnetic cluster-encapsulated polymer dimers with controlled surface property
- Author
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Ping Lu, Hyungju Ahn, Hosu Kang, Hye Ji Kim, Da In Kim, Dong Choon Hyun, Ki Hak Kim, Jong Bok Kim, and Ju Hyang Park
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Dispersion polymerization ,chemistry.chemical_classification ,Materials science ,Magnetism ,General Chemical Engineering ,Polymer ,equipment and supplies ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,medicine ,Surface modification ,Polystyrene ,Swelling ,medicine.symptom ,Anisotropy ,human activities ,Magnetite - Abstract
This work reports the fabrication of magnetic polymer dimers with controlled surface anisotropy. The fabrication process involves the preparation of magnetite (Fe3O4) magnetic clusters with strong magnetism, followed by their surface modification, dispersion polymerization while using them as seeds, multilayer shell formation via layer-by-layer deposition, and polymer core swelling. The interplay between the swelling and multilayer shells generates pressure inside the multilayer-deposited, magnetic polystyrene (PS) spheres, forming structurally anisotropic dimers with single PS protrusions anchored on the multilayer surfaces within minutes. The use of titania precursor and different swelling agents, along with the change in the composition of the multilayer shell, enables the introduction of different surface anisotropies, such as the surface-charge anisotropy, anisotropic hydrophilicity/hydrophobicity, and material composition anisotropy, to the dimers. The strong magnetic response of the dimers, attributed to the magnetic cluster seeds, in combination with the surface-charge and material composition anisotropies allows a rapid magnetic recovery and an excellent reusability, enabling their application to 20-cycled reduction of 4-nitrophenol (4-NP) and methylene blue (MB) without loss of catalytic activity. Furthermore, the anisotropic hydrophilicity/hydrophobicity makes the dimers potentially useful as solid surfactant to stabilize immiscible oil–water mixture.
- Published
- 2022
7. Assessing the Fear Factor of Coronavirus Disease 2019 (COVID-19) in Korea Using the COVID-19 Phobia Scale: A Cross-Sectional Study
- Author
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Hocheol Lee, Hye Ji Kim, Dan Hee Kwon, Myung Bae Park, Sang Mi Kim, Kyeong Na Kim, and Eun Woo Nam
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General Medicine - Published
- 2023
8. Targeting Catecholamines to Develop New Drugs for Attention Deficit Hyperactivity Disorder
- Author
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Sung-Cherl Jung, Chang-Hwan Cho, Hye-Ji Kim, Eun-A Ko, Min-Woo Ha, and Oh-Bin Kwon
- Subjects
mental disorders - Abstract
The prevalence of attention deficit hyperactivity disorder (ADHD), a developmental neuropsychiatric disorder, is high among children and adolescents. The pathogenesis of ADHD is mediated with genetic, biological, and environmental factors. Most therapeutic drugs for ADHD have so far targeted biological causes, primarily by regulating catecholaminergic neurotransmitters. However, ADHD drugs that are clinically treated have various problems in their addictiveness and drug stability; thus, it is recommended that efficacy and safety should be secured through simultaneous prescription of multiple drugs rather than a single drug treatment. Accordingly, it is necessary to develop drugs that newly target pathogenic mechanisms of ADHD. In this study, we attempt to confirm the possibility of developing new drugs by reviewing dopamine-related developmental mechanisms of neurons and their correlation with ADHD. Histone deacetylase inhibitors (HDACi) can regulate the concentration of intracellular dopamine in neurons by expressing vesicular monoamine transporter 2 and inducing the exocytosis of neurotransmitters to the synaptic cleft, thereby promoting the development of neurons and signal transmission. This cellular modulation of HDACi is expected to treat ADHD by regulating endogenous catecholamines such as dopamine. Although studies are still in the preclinical stage, HDAC inhibitors clearly have potential as a therapeutic agent with low addictiveness and high efficacy for ADHD treatment.
- Published
- 2021
9. Environmental pH and Supplemental C Exert Little Impact on Shrimp, but Profound Impacts on Plants in Marine Aquaponics
- Author
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Yu-Ting Chu, Yiwen Bao, Jen-Yi Huang, Hye-Ji Kim, and Paul B. Brown
- Subjects
life_sciences_other - Abstract
pH is the major factor that makes producers in aquaponics frustrated, since the main three organisms (aquatic animal, plant, and microbes) in the system with different preferences. Yet, amending the growing environment with additional C is a potential method to improve the growth of shrimp and plants as well as the establishment of microbe. A detailed study of the effects of pH and additional C on aquaponics under saline conditions has not been investigated. In this study, the effect of pH and additional C on the growth performance of shrimp (Litopenaeus vannamei) and five edible plants in marine aquaponic systems using the nutrient film technique (NFT) was evaluated. The results indicated that at both pH 6.5 treatments, plants grew better; nevertheless, the growth performance of plants in pH 7.5 with additional C was improved and showed a similar yield to lower pH treatments. On the other hand, shrimp growth was little affected by pH and additional C. A higher impact of imbalanced ionic composition on shrimp performance may have contributed to this trend. Hence, we suggest that only if the ionic composition is managed can make RO water a suitable source of water for shrimp-based aquaponic. In spite of this, more research is required.
- Published
- 2022
10. A Reconsideration of the Analogy as Word Formation Mechanism -Focusing on the types of analogy
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Hye-Ji Kim
- Subjects
Physics ,Cognitive science ,Analogy ,Word formation ,Mechanism (sociology) - Published
- 2021
11. The differentially expressed gene signatures of the Cullin 3-RING ubiquitin ligases in neuroendocrine cancer
- Author
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Jong-Uk Park, Dong-Kyu Kim, Ji-Ye Kim, Jae-Hyun Jo, Yeong-Mu Kim, Dong-Hyun Jung, Hye-Ji Kim, Seon-Mi Ok, Hyo Je Cho, Sangjune Kim, Christophe E. Redon, Mirit I. Aladjem, and Sang-Min Jang
- Subjects
Ubiquitin ,Ubiquitin-Protein Ligases ,Biophysics ,Ubiquitination ,Humans ,Cell Biology ,Carrier Proteins ,Cullin Proteins ,Molecular Biology ,Biochemistry ,Carcinoma, Neuroendocrine ,Transcription Factors - Abstract
Cullin-RING ubiquitin E3 ligase (CRLs) composed of four components including cullin scaffolds, adaptors, substrate receptors, and RING proteins mediates the ubiquitination of approximately 20% of cellular proteins that are involved in numerous biological processes. While CRLs deregulation contributes to the pathogenesis of many diseases, including cancer, how CRLs deregulation occurs is yet to be fully investigated. Here, we demonstrate that components of CRL3 and its transcriptional regulators are possible prognosis marker of neuroendocrine (NE) cancer. Analysis of Cancer Cell Line Encyclopedia (CCLE) through the CellMinerCDB portal revealed that expression of CRL3 scaffold Cullin 3 (CUL3) highly correlates with NE signature, and CUL3 silencing inhibited NE cancer proliferation. Moreover, subset of 151 BTB (Bric-a-brac, Tramtrack, Broad complex) domain-containing proteins that have dual roles as substrate receptors and adaptor subunits in CRL3, as well as the expression of transcription factors (TFs) that control the transcription of BTB genes were upregulated in NE cancer. Analysis using published ChIP-sequencing data in small cell lung cancer (SCLC), including NE or non-NE SCLC verified that gene promoter of candidates which show high correlation with NE signature enriched H3K27Ac. These observations suggest that CRL3 is a master regulator of NE cancer and knowledge of specifically regulated CRL3 genes in NE cancer may accelerate new therapeutic approaches.
- Published
- 2022
12. A Study of Job Adjustment Process of Adult Returnees: Using Grounded Theory Students in Korea Acculturative Stress and Adaptation to College Life
- Author
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Hye-ji Kim and Mi-kyung Kim
- Subjects
Fuel Technology ,Process (engineering) ,Process Chemistry and Technology ,Economic Geology ,Psychology ,Adaptation (computer science) ,Social psychology ,Grounded theory ,Acculturation - Published
- 2021
13. How Negative Parenting May Link with Aggression in Children
- Author
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Yang Hee Lee, Yeo Gyeong Yun, Hye Ji Kim, and Sang Won Kim
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Aggression ,medicine ,General Medicine ,medicine.symptom ,Link (knot theory) ,Psychology ,Developmental psychology - Published
- 2021
14. The Impact of Care Workers' Employment Characteristics and Perception of Facility Directors' Transformational Leadership on Quality of Service
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Hye Ji Kim, Bum Jung Kim, and Sang Hee Park
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Transformational leadership ,Care workers ,business.industry ,Perception ,media_common.quotation_subject ,Quality of service ,Public relations ,Psychology ,business ,media_common - Published
- 2021
15. Prenatal Exposure to High Cortisol Induces ADHD-like Behaviors with Delay in Spatial Cognitive Functions during the Post-weaning Period in Rats
- Author
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Hye-Ji Kim, Sung-Cherl Jung, Eun-A Ko, and Sang-Chan Jeon
- Subjects
0301 basic medicine ,Impulsivity ,Elevated plus maze ,medicine.medical_specialty ,Offspring ,Morris water navigation task ,Cortisol ,Open field ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,Corticosterone ,Internal medicine ,medicine ,ADHD ,Attention deficit hyperactivity disorder ,Pregnancy ,business.industry ,Maternal depression ,medicine.disease ,Hyperactivity ,Cognitive impairment ,030104 developmental biology ,Endocrinology ,chemistry ,Original Article ,Neurology (clinical) ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
High levels of cortisol in blood are frequently observed in patients with major depressive disorders and increased cortisol level induces depressivelike symptoms in animal models. However, it is still unclear whether maternal cortisol level during pregnancy is a critical factor resulting in neuropsychiatric disorders in offspring. In this study, we increased cortisol level in rats by repetitively injecting corticosterone subcutaneously (Corti. Mom, 20 mg/kg/day) during pregnancy and evaluated the behavioral patterns of their pups (Corti.Pups) via forced swimming (FS), open field (OF), elevated plus maze (EPM) and Morris water maze (MWM) tests during the immediate post-weaning period (postnatal day 21 to 25). In results, corticosterone significantly increased plasma cortisol levels in both Corti.Moms and Corti.Pups. Unlike depressive animal models, Corti.Pups showed higher hyperactive behaviors in the FS and OF tests than normal pups (Nor.Pups) born from rats (Nor.Moms) treated with saline. Furthermore, Corti.Pups spent more time and traveled longer distance in the open arms of EPM test, exhibiting higher extremity. These patterns were consistent with behavioral symptoms observed in animal models of attention deficit hyperactivity disorder (ADHD), which is characterized by hyperactivity, impulsivity, and inattention. Additionally, Corti.Pups swam longer and farther to escape in MWM test, showing cognitive declines associated with attention deficit. Our findings provide evidence that maternal cortisol level during pregnancy may affect the neuroendocrine regulation and the brain development of offspring, resulting in heterogeneous developmental brain disorders such as ADHD.
- Published
- 2021
16. Cooperative Operation Schedules of Energy Storage System and Demand Response Resources Considering Urban Railway Load Characteristic under a Time-of-Use Tariff
- Author
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Il Seo Hwang, Eun Su Chae, Hosung Jung, Hyo Jin Kim, Hye Ji Kim, Young Jun Ko, Jae-Haeng Heo, and Jong-young Park
- Subjects
business.industry ,Computer science ,020209 energy ,020208 electrical & electronic engineering ,Tariff ,Change model ,02 engineering and technology ,Energy storage ,Reliability engineering ,Demand response ,Air conditioning ,0202 electrical engineering, electronic engineering, information engineering ,Electricity ,Electrical and Electronic Engineering ,business ,Time of use ,Energy (signal processing) - Abstract
This paper proposes an algorithm for the cooperative operation of air conditioning facilities and the energy storage system (ESS) in railway stations to minimize electricity. Unlike traditional load patterns, load patterns of an urban railway station can peak where energy charge rates are not high. Due to this possibility, if applying the traditional peak-reduction algorithm to railway loads, energy changes can increase, resulting in higher electricity bills. Therefore, it is required to develop a new method for minimizing the sum of capacity charges and energy charges, which is a non-linear problem. To get a feasible solution for this problem, we suggest an algorithm that optimizes the facility operation through two optimizations (primary and secondary). This method is applied to the air-quality change model for operating air conditioning facilities as demand-response (DR) resources in railway stations. This algorithm makes it possible to estimate operable DR capacity every hour, rather than calculating the capacity of DR resources conservatively in advance. Finally, we perform a simulation for the application of the proposed method to the operation of DR resources and ESS together. The simulation shows that electricity bills become lowered, and the number of charging and discharging processes of ESS is also reduced.
- Published
- 2021
17. Effects of Covert Narcissism, Shame, and Depression on Binge-eating among University Students
- Author
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Hye-Ji Kim and MinKyu Rhee
- Subjects
Psychiatry and Mental health ,Binge eating ,Covert ,media_common.quotation_subject ,Narcissism ,medicine ,Shame ,medicine.symptom ,Psychology ,Depression (differential diagnoses) ,Clinical psychology ,media_common - Published
- 2020
18. Effects of Plant-Derived Protein Hydrolysates on Yield, Quality, and Nitrogen Use Efficiency of Greenhouse Grown Lettuce and Tomato
- Author
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Mariateresa Cardarelli, Giuseppe Colla, Hye-Ji Kim, and Seunghyun Choi
- Subjects
biostimulants ,protein hydrolysate ,nitrogen use efficiency ,nitrogen uptake efficiency ,Solanum lycopersicum L ,Lactuca sativa L ,antioxidant activity ,Agronomy and Crop Science - Abstract
Plant-derived protein hydrolysates (PHs) are gaining global interest for their sustainability and positive effects on crops under abiotic stresses. However, the long-term effects of PHs on the yield and quality of greenhouse crops have not been described. Romaine lettuce (Lactuca sativa L.) and Micro-Tom tomato (Solanum lycopersicum L.) were grown with commercial growing media in 1 L pots and fertigated with four N levels (2, 5, 10, and 15 mM). PH (0 or 3 g/L) was applied as a foliar spray (PH-F) or root drench (PH-R) once every week. Compared to PH-F, PH-R effectively stimulated the yield, photosynthesis, water-use efficiency, chlorophyll contents, and antioxidant activities, and compounds regardless of N levels and species. Increasing the N level led to a total dry weight gain, and PH-R enhanced the lettuce shoot dry weight (+31%) and tomato fruit dry weight (+22%). PH-R also increased the fresh marketable yield of lettuce (+21%) and tomato (+32%). The increasing N level decreased antioxidant parameters in lettuce leaves, not in tomato fruits, whereas PH-R improved them in both species. PH-R significantly enhanced the N use and uptake efficiency. Taken together, our results suggested that the addition of PH-R effectively increased the N uptake and subsequently increased the lettuce and tomato yield and quality regardless of N levels.
- Published
- 2022
- Full Text
- View/download PDF
19. Peripheral Pain Modulation of Chrysaora pacifica Jellyfish Venom Requires Both Ca2+ Influx and TRPA1 Channel Activation in Rats
- Author
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Hye-Ji Kim, Sang-Chan Jeon, Na-Hye Hwang, Jin-Woo Noh, Young Joon Kang, Khulan Amarsanaa, Yoon-Sil Yang, Eun-A Ko, and Sung-Cherl Jung
- Subjects
0301 basic medicine ,Chemistry ,General Neuroscience ,Neurotoxicity ,Inflammation ,Venom ,Pharmacology ,Toxicology ,medicine.disease ,03 medical and health sciences ,Transient receptor potential channel ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,Nociception ,Dorsal root ganglion ,medicine ,Verapamil ,Channel blocker ,medicine.symptom ,030217 neurology & neurosurgery ,medicine.drug - Abstract
The venom of jellyfish triggers severe dermal pain along with inflammation and tissue necrosis, and occasionally, induces internal organ dysfunction. However, the basic mechanisms underlying its cytotoxic effects are still unknown. Here, we report one of the mechanisms involved in peripheral pain modulation associated with inflammatory and neurotoxic oxidative signaling in rats using the venom of jellyfish, Chrysaora pacifica (CpV). This jellyfish is identified by brown tentacles carrying nematocysts filled with cytotoxic venom that induces severe pain, pruritus, tentacle marks, and blisters. The subcutaneous injection of CpV into rat forepaws in behavioral tests triggered nociceptive response with a decreased threshold for mechanical pain perception. These responses lasted up to 48 h and were completely blocked by verapamil and TTA-P2, T-type Ca2+ channel blockers, or HC030031, a transient receptor potential cation ankyrin 1 (TRPA1) channel blocker, while another Ca2+ channel blocker, nimodipine, was ineffective. Also, treatment with Ca2+ chelators (EGTA and BaptaAM) significantly alleviated the CpV-induced pain response. These results indicate that CpV-induced pain modulation may require both Ca2+ influx through the T-type Ca2+ channels and activation of TRPA1 channels. Furthermore, CpV induced Ca2+-mediated oxidative neurotoxicity in the dorsal root ganglion (DRG) and cortical neurons dissociated from rats, resulting in decreased neuronal viability and increased intracellular levels of ROS. Taken together, CpV may activate Ca2+-mediated oxidative signaling to produce excessive ROS acting as an endogenous agonist of TRPA1 channels in the peripheral terminals of the primary afferent neurons, resulting in persistent inflammatory pain. These findings provide strong evidence supporting the therapeutic effectiveness of blocking oxidative signaling against pain and cytotoxicity induced by jellyfish venom.
- Published
- 2020
20. Relationship Between Psychological Capital, Organizational Justice, and Organizational Commitment of Beauty Workers
- Author
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Hye Ji Kim and Ji JeongHun
- Subjects
media_common.quotation_subject ,Organizational justice ,Capital (economics) ,Beauty ,Organizational commitment ,Psychology ,Social psychology ,media_common - Abstract
미용종사자들은 장시간으로 산업환경에서, 육체적 정신적 노동을 함으로 감정적, 심리적 소진을 경험 함으로써, 인적자원 의존도가 높은 미용산업은 노동 집약적인 산업으로서 서비스 직종 중에서도 다양한 고객의 욕구에 다양성과 경쟁력에 대처할 수 있는 인적자원 관리가 매우 중요하다. 미용종사자의 심리적자본, 조직공정성, 조직몰입에 초점을 두어 연구하고자 한다. 이에 본 연구는 미용종사자들의 심리적자본과 조직공정성, 조직몰입 간의 어떠한 영향관계를 규명하여 요인들간의 매개효과를 알아보려는 데 그 목적이 있으며, 인적자원을 효율적으로 관리하기 위한 방안을 도출하고자 한다. 연구의 설계는 서울 및 수도권 지역에 위치한 미용종사자들을 대상으로 총 410부의 설문지를 사용하였다. 자료분석방법은 미용종사자의 심리적자본과 조직공정성, 조직몰입의 관계를 규명하기 위해서 SPSS 21.0 프로그램을 사용하였으며, 빈도분석, 탐색적 요인분석, Cronbach’s α계수 산출, 기술통계분석, 상관관계분석, 선형회귀분석, 매개회귀분석을 실시하였다. 본 연구의 결과는 첫째, 미용종사자의 심리적자본은 조직공정성에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 미용종사자의 심리적자본은 조직몰입에 긍정적인 영향을 주는 것으로 나타났다. 셋째, 미용종사자의 조직공정성은 조직몰입에 긍정적인 영향을 미친다는 연구결과가 나왔으며, 넷째, 조직공정성은 미용종사자의 심리적자본이 조직몰입에 부분매개 하는 것으로 나타났다. 본 연구를 토대로 미용종사자들의 조직몰입을 위해서 심리적자본 프로그램 개발을 위한 노력이 필요하며, 미용산업환경의 어려움으로 미용종사자들의 조직몰입이 감소하지 않게 조직 유효성을 높이는 것뿐만 아니라 인적자원을 확충해 미용종사자의 산업현장에서 심리적자본 향상을 위한 프로그램을 개발하고 운영해야 한다.
- Published
- 2020
21. Polymer particles with controllable and complex structures for high immobilization of noble-metal nanoparticles
- Author
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Hojun Seo, Da In Kim, Geon Dae Moon, Hyungju Ahn, Sang Gi Hong, Ju Hyang Park, Hye Ji Kim, Jong Bok Kim, and Dong Choon Hyun
- Subjects
Dispersion polymerization ,Fabrication ,Materials science ,General Chemical Engineering ,Cationic polymerization ,Nanoparticle ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Monomer ,chemistry ,Chemical engineering ,Colloidal gold ,engineering ,Noble metal ,Polystyrene ,0210 nano-technology - Abstract
This work demonstrates the fabrication of cationic polymer particles with controllable and complex structures for the high immobilization of noble-metal nanoparticles (NPs). The fabrication involves the use of a cationic extra monomer to synthesize polystyrene (PS) solid spheres with cationic character, followed by their transformation into complex-structured particles via the phase separation route in a seeded dispersion polymerization. Control of the phase separation enables the formation of PS particles with cage- and bowl-like shapes as well as hollow structures. The large surface areas of the complex-structured particles, as theoretically calculated using simple models, and the electrostatic attraction between them and the negatively charged noble-metal NPs, as experimentally observed, allow the high immobilization of noble-metal NPs onto their surfaces.
- Published
- 2020
22. Maximizing Nutrient Recovery from Aquaponics Wastewater with Autotrophic or Heterotrophic Management Strategies
- Author
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Peng Chen, Hye-Ji Kim, Luke Raymond Thatcher, Joshua Michael Hamilton, Makayla L. Alva, Zhi Zhou, and Paul B. Brown
- Subjects
History ,Environmental Engineering ,Polymers and Plastics ,Renewable Energy, Sustainability and the Environment ,Bioengineering ,Business and International Management ,Waste Management and Disposal ,Industrial and Manufacturing Engineering - Published
- 2022
23. The venom of jellyfish, Chrysaora pacifica, induces neurotoxicity via activating Ca2+-mediated ROS signaling in HT-22 cells
- Author
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Sung-Cherl Jung, Hye-Ji Kim, Minsoo Kim, Yoon-Sil Yang, and Young Joon Kang
- Subjects
chemistry.chemical_classification ,Jellyfish ,Reactive oxygen species ,biology ,Chemistry ,Chrysaora pacifica ,Organic Chemistry ,Ros signaling ,Neurotoxicity ,Bioengineering ,Venom ,medicine.disease ,Cell biology ,Apoptosis ,biology.animal ,medicine ,Ca2 signaling - Published
- 2019
24. Diffusion-Controlled Crystallization of Calcium Carbonate in a Hydrogel
- Author
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Yookyeong Oh, Min-kyung Jo, Hong Lyun Kim, Sung Ho Yang, and Hye Ji Kim
- Subjects
Materials science ,010405 organic chemistry ,Diffusion ,Nucleation ,General Chemistry ,010402 general chemistry ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Calcium carbonate ,Chemical engineering ,chemistry ,law ,General Materials Science ,Crystallization - Abstract
Biominerals possess characteristic structures and superior properties originating from exquisitely controlled nucleation and growth of constituent crystals. There have been many attempts to mimic t...
- Published
- 2019
25. Improvement of the thermal stability of dendritic silver-coated copper microparticles by surface modification based on molecular self-assembly
- Author
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Kwang Hyun Nam, Seunghyun Lee, Tae Hyeong Kim, Nara Lee, Hyo Jun Jang, Hye Ji Kim, and Dae-won Chung
- Subjects
Technology ,Thermogravimetric analysis ,Materials science ,Scanning electron microscope ,Science ,QC1-999 ,Energy-dispersive X-ray spectroscopy ,chemistry.chemical_element ,TP1-1185 ,X-ray photoelectron spectroscopy ,General Materials Science ,Thermal stability ,Alkanethiol ,Alkyl ,chemistry.chemical_classification ,Full Paper ,Ag/Cu ,Chemical technology ,Physics ,General Engineering ,Conductive film ,Copper ,chemistry ,Chemical engineering ,Surface modification ,TP248.13-248.65 ,Biotechnology - Abstract
In the study reported herein, silver-coated copper (Ag/Cu) powder was modified with alkanethiols featuring alkyl chains of different lengths, namely butyl, octyl, and dodecyl, to improve its thermal stability. The modification of the Ag/Cu powders with adsorbed alkanethiols was confirmed by scanning electron microscopy with energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. Each powder was combined with an epoxy resin to prepare an electrically conductive film. The results confirmed that the thermal stability of the films containing alkanethiol-modified Ag/Cu powders is superior to that of the film containing untreated Ag/Cu powder. The longer the alkyl group in the alkanethiol-modified Ag/Cu powder, the higher the initial resistance of the corresponding electrically conductive film and the lower the increase in resistance induced by heat treatment.
- Published
- 2021
26. Influence of physical properties of peat-based potting mixes substituted with parboiled rice hulls on plant growth under two irrigation regimes
- Author
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Hye-Ji Kim, Lizhen Xu, and Seunghyun Choi
- Subjects
0106 biological sciences ,0301 basic medicine ,Irrigation ,Chemistry ,Plant Science ,Horticulture ,Rice hulls ,01 natural sciences ,Bulk density ,Potting soil ,Potting ,03 medical and health sciences ,030104 developmental biology ,Shoot ,Perlite ,Water-use efficiency ,010606 plant biology & botany ,Biotechnology - Abstract
This study was conducted to investigate the effects of physical properties of peat-based substrate mixtures partially substituted with parboiled rice hulls (PRH) on plant growth and performance. Thirteen substrate mixtures were formulated by substituting 0, 20, 30, 40, 50, 60, or 70% peat with either parboiled ground rice hulls (GRH) or whole rice hulls (WRH) (by volume) in commercial potting mix (CPM) containing 70% peat, 20% perlite, and 10% vermiculite. All substrate mixtures consisted of mainly medium-sized (2.0–0.25 mm) particles. However, regardless of the mixing ratio, GRH significantly increased the medium-sized particles especially with diameters of 2.0–0.71 mm, while WRH increased both the medium- and coarse-sized (> 2.0 mm) particles. A higher mixing ratio of PRH increased air space and decreased container capacity but to a greater extent by WRH compared to GRH. Similarly, bulk density was increased with a higher mixing ratio of both types of PRH, but to a greater degree by GRH. Total porosity of GRH-containing substrates was similar to that of CPM within the range of 30–70%. The substrate mixtures containing PRH did not have the same physical properties as the CPM at any mixing ratio, but the values of some GRH-containing mixtures were within or close to the suggested ranges for greenhouse substrates. Considering the maximum substitution of PRH for peat, the substitution with 40% GRH (GRH-40) was selected for a plant growth study in comparison to CPM. Petunia (Petunia × hybrida) ‘Easy Wave Neon Rose’ and zinnia (Zinnia elegans) ‘Benary’s Giant Golden Yellow’ were grown in pots containing CPM and GRH-40 at two irrigation levels: high (25–30%, by volume) and low (20–25%). Overall, shoot DW of both plant species was reduced in GRH-40, but root DW was maintained similar to those in CPM. The low irrigation level more significantly reduced shoot DW of petunia grown in CPM than in GRH-40, relative to their counterparts with the high irrigation level (20 and 7%, respectively); however, root growth of plant species grown in GRH-40 was either maintained or tended to be maintained even at the low irrigation level compared to their high irrigation counterparts. The water use efficiency of plants grown in GRH-40 was not significantly different from those in CPM regardless of irrigation level. These results indicate that GRH-40 provides desirable physical properties and water release characteristics, allowing more available water for plants under low irrigation levels than CPM. We concluded that substituting peat with 40% GRH in a commercial potting mix is a sustainable approach to produce petunia and zinnia.
- Published
- 2019
27. Controlled Environment Food Production for Urban Agriculture
- Author
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Celina Gómez, Christopher J. Currey, Ryan W. Dickson, Hye-Ji Kim, Ricardo Hernández, Nadia C. Sabeh, Rosa E. Raudales, Robin G. Brumfield, Angela Laury-Shaw, Adam K. Wilke, Roberto G. Lopez, and Stephanie E. Burnett
- Subjects
Food security ,business.industry ,Food processing ,Plant factory ,Environment controlled ,Greenhouse ,Horticulture ,Food safety ,business ,Urban agriculture ,Agricultural economics - Abstract
The recent increased market demand for locally grown produce is generating interest in the application of techniques developed for controlled environment agriculture (CEA) to urban agriculture (UA). Controlled environments have great potential to revolutionize urban food systems, as they offer unique opportunities for year-round production, optimizing resource-use efficiency, and for helping to overcome significant challenges associated with the high costs of production in urban settings. For urban growers to benefit from CEA, results from studies evaluating the application of controlled environments for commercial food production should be considered. This review includes a discussion of current and potential applications of CEA for UA, references discussing appropriate methods for selecting and controlling the physical plant production environment, resource management strategies, considerations to improve economic viability, opportunities to address food safety concerns, and the potential social benefits from applying CEA techniques to UA. Author’s viewpoints about the future of CEA for urban food production are presented at the end of this review.
- Published
- 2019
28. A Study on Subjective Recognition about Retirement Preparation of Millennial Generation
- Author
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Young Sun Rhee and Hye-Ji Kim
- Subjects
General Medicine - Published
- 2019
29. Occurrence of Veterinary Antibiotics in the Groundwater of Arable Land
- Author
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Kim, Sung Chul, Young Kyu Hong, Hye Ji Kim, Won-Suk Choi, and Seung Yun Lee
- Subjects
Environmental science ,Arable land ,Water resource management ,Groundwater ,Nonpoint source pollution - Published
- 2019
30. The Effects of Creativity Personality, Study Interest, Parenting Style on Task Commitment of Gifted Students
- Author
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Shin-Dong Lee and Hye-Ji Kim
- Subjects
media_common.quotation_subject ,Personality ,Creativity ,Psychology ,Social psychology ,media_common ,Style (sociolinguistics) ,Task (project management) - Published
- 2019
31. Gingivitis Reduction Effects by Using Dentifrice Containing Green Tea Extract, Sodium Monofluorophosphate, and Calcium Carbonate
- Author
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Min-Jeong Kim, Mi-Sol Park, Hye-Ji Kim, Chanho Kim, Ji-Youn Kim, Seung-Sook Yang, Jung-Eun Park, Ja-Won Cho, Ki-Jung Kim, and Sun-Ae Mok
- Subjects
Gingivitis ,chemistry.chemical_compound ,Calcium carbonate ,chemistry ,medicine ,Dentifrice ,Catechin ,Food science ,Green tea extract ,Sodium monofluorophosphate ,medicine.symptom - Published
- 2019
32. In Vivo Characterization of Phosphotransferase-Encoding Genes istP and forP as Interchangeable Launchers of the C3��,4��-Dideoxygenation Biosynthetic Pathway of 1,4-Diaminocyclitol Antibiotics
- Author
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Je Won Park, Hye Ji Kim, Na Joon Lee, Hyun Ha Hwang, Eun Gyo Seo, Nguyen Huu Hoang, Hye Bin Son, and Nguyen Lan Huong
- Subjects
Mutant ,Biology ,Micromonospora ,Applied Microbiology and Biotechnology ,Genome ,Phosphotransferase ,chemistry.chemical_compound ,Bacterial Proteins ,Biosynthesis ,Putative gene ,Amino Acid Sequence ,Gene ,Phosphotransferases ,Deoxyguanine Nucleotides ,General Medicine ,Streptomyces ,Anti-Bacterial Agents ,Biosynthetic Pathways ,Complementation ,Aminoglycosides ,chemistry ,Biochemistry ,Genes, Bacterial ,Gentamicins ,Sequence Alignment ,Function (biology) ,Dideoxynucleotides ,Biotechnology - Abstract
Deactivation of aminoglycosides by their modifying enzymes, including a number of aminoglycoside O-phosphotransferases, is the most ubiquitous resistance mechanism in aminoglycoside-resistant pathogens. Nonetheless, in a couple of biosynthetic pathways for gentamicins, fortimicins, and istamycins, phosphorylation of aminoglycosides seems to be a unique and initial step for the creation of a natural defensive structural feature such as a 3',4'- dideoxy scaffold. Our aim was to elucidate the biochemical details on the beginning of these C3',4'-dideoxygenation biosynthetic steps for aminoglycosides. The biosynthesis of istamycins must surely involve these 3',4'-didehydroxylation steps, but much less has been reported in terms of characterization of istamycin biosynthetic genes, especially about the phosphotransferase-encoding gene. In the disruption and complementation experiments pointing to a putative gene, istP, in the genome of wild-type Streptomyces tenjimariensis, the function of the istP gene was proved here to be a phosphotransferase. Next, an in-frame deletion of a known phosphotransferase-encoding gene forP from the genome of wild-type Micromonospora olivasterospora resulted in the appearance of a hitherto unidentified fortimicin shunt product, namely 3-O-methyl-FOR-KK1, whereas complementation of forP restored the natural fortimicin metabolite profiles. The bilateral complementation of an istP gene (or forP) in the ΔforP mutant ( or ΔistP mutant strain) successfully restored the biosynthesis of 3',4'- dideoxy fortimicins and istamycins , thus clearly indicating that they are interchangeable launchers of the biosynthesis of 3',4'-dideoxy types of 1,4-diaminocyclitol antibiotics.
- Published
- 2019
33. Light spectral and thermal properties govern biomass allocation in tomato through morphological and physiological changes
- Author
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Cary A. Mitchell, Hye-Ji Kim, and Meng-Yang Lin
- Subjects
0106 biological sciences ,0301 basic medicine ,Canopy ,Chemistry ,fungi ,food and beverages ,Biomass ,Far-red ,Plant Science ,Photosynthesis ,01 natural sciences ,03 medical and health sciences ,chemistry.chemical_compound ,Horticulture ,030104 developmental biology ,Chlorophyll ,Shoot ,Water-use efficiency ,Agronomy and Crop Science ,Ecology, Evolution, Behavior and Systematics ,010606 plant biology & botany ,Transpiration - Abstract
We investigated the effects of light spectral and thermal properties on biomass allocation among vegetative and reproductive structures in tomato (Solanum lycopersicum L. ‘Merlice’) plants during growth and development and to determine its underlying mechanisms. Plants were grown in a greenhouse under a DLI of 3.4 mol m2 day−1 with/without supplemental lighting and a 16-h photoperiod, provided at equal photosynthetic photon flux density (PPFD of 230 μmol m‒2 s‒1 either from overhead high-pressure sodium (HPS) lamps or intracanopy light-emitting diode (LED) arrays: red light alone (R100; 100% of photosynthetically active radiation (%PAR)), red plus low far-red (R100+FR21), red plus high far-red (R100+FR41), and red plus blue (R61+B39). Supplemental lighting substantially increased total biomass and fruit yield, but to a greater extent by LED lighting regardless of spectrum. However, spectral contribution to leaf morphological traits and biomass allocation pattern varied greatly among the light treatments. HPS-supplemented plants had higher leaf temperature, photosynthetic rate (Pn), and transpiration rate (E) in the upper foliar canopy (161 to 240 cm from the base of the shoot) and contained higher water content in all tissues, particularly in roots by 2-fold, compared to LED-supplemented plants. They also had thinner, smaller leaves and allocated a higher fraction of total biomass to vegetative tissues, demonstrating their allocation strategies for effective transpiration and heat dissipation. Meanwhile, LED-supplemented plants allocated biomass preferentially to reproductive structures at the expense of vegetative tissues. Inclusion of higher FR or B with R light decreased leaf biomass fraction relative to total biomass but increased leaf dry mass and leaf thickness. Particularly, supplemental FR light significantly lowered the water content of leaves and fruits compared to B light. Long-term exposure of tomato plants to low R:FR was associated with reductions in leaf area, chlorophyll content, and vegetative shoot biomass fraction, increases in leaf thickness and fruit biomass, and acceleration of flowering and fruiting. Light-induced biomass allocation changed between vegetative and reproductive structures during plant growth and development. FR light had the most pronounced effect in this regard by significantly shifting dry-mass accumulation to fruits, via more efficient photosynthetic mechanisms and conserved water use. We conclude that light spectral and thermal properties affect biomass allocation among plant parts during tomato growth and development, and such responses involve morphological and physiological changes in tomato plants, ultimately affecting crop performance and yield.
- Published
- 2019
34. Dexamethasone Promotes Keratinocyte Proliferation by Triggering Keratinocyte Growth Factor in Mast Cells
- Author
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Kyung Ah Cho, So Youn Woo, Yu Hee Kim, Hye Ji Kim, and Minhwa Park
- Subjects
integumentary system ,biology ,Immunology ,Stimulation ,General Medicine ,Mast cell ,chemistry.chemical_compound ,HaCaT ,medicine.anatomical_structure ,chemistry ,Cell culture ,Cancer research ,medicine ,biology.protein ,Immunology and Allergy ,Keratinocyte growth factor ,Antibody ,Keratinocyte ,Dexamethasone ,medicine.drug - Abstract
Background: The skin is a dynamic body organ that can be activated by both central and local hypothalamic-pituitary-adrenal axis systems. This phenomenon might be the crucial explanation why stress can cause relapse of chronic inflammatory skin diseases, such as psoriasis. Here, we determined the effects of mast cells on keratinocyte proliferation under stress hormone stimulation. Methods: We subcutaneously injected dexamethasone on the shaved back of mice and evaluated histological changes and keratinocyte growth factor (KGF) expression on dermal mast cells. Further, human mast cell line (HMC-1) and keratinocyte cell line (HaCaT) cells were treated with dexamethasone in vitro to observe the extent of proliferation and the expression of KGF. Finally, the supernatants of HMC-1 cells treated with dexamethasone were used for the culture of HaCaT cells to investigate the effect on proliferation. Results: We observed epidermal thickening in dexamethasone-injected mice, accompanied by an increase in the number of KGF-expressing dermal mast cells. Similar to mouse dermal mast cells, KGF was highly expressed in the human mast cell line HMC-1 following stimulation with dexamethasone. Further, dexamethasone-treated mast cells promoted keratinocyte proliferation in vitro. However, the effects of mast cells on keratinocytes were significantly diminished in the presence of anti-KGF-blocking antibodies. Conclusion: Taken together, our results show that a stressful environment may disturb skin barrier homeostasis through mast cell-derived KGF expression.
- Published
- 2019
35. A Study on the Development of the Seoul Fairytale Festival - Focused on the Organic Relatedness of the Component Elements of the Festival
- Author
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Hye Ji Kim and Ki Duk Jang
- Subjects
Architectural engineering ,Engineering ,business.industry ,Component (UML) ,business - Published
- 2018
36. Short-term activation of synaptic transmission by acute KCl application significantly reduces somatic A-type K+ current
- Author
-
Moon-Seok Kang, Jung-Yop Song, Sung-Cherl Jung, and Hye-Ji Kim
- Subjects
Chemistry ,Somatic cell ,Current (fluid) ,Neurotransmission ,Neuroscience ,Term (time) - Published
- 2018
37. Endogenous glutamate enhances survival rates of neurons via activating mitochondrial signalings in hippocampal neuron
- Author
-
Sung-Cherl Jung, Hye-Ji Kim, Moon-Suk Kang, Jin-Woo Noh, Yoon-Sil Yang, and Su-Yong Eun
- Subjects
Chemistry ,Glutamate receptor ,Excitotoxicity ,medicine ,Hippocampal neuron ,NMDA receptor ,Endogeny ,Mitochondrion ,medicine.disease_cause ,Neuroscience - Published
- 2018
38. Effect of antiviral therapy in reducing perinatal transmission of hepatitis B virus and maternal outcomes after discontinuing them
- Author
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Seung Kew Yoon, Sa-Jin Kim, Si Hyun Bae, Kwang Il Seo, Juyoung Lee, Pil Soo Sung, Hyun Seung Lee, Hye Ji Kim, Jong Hyun Kim, Se Hyun Jo, Jong Young Choi, Young Moo Lee, Bo Hyun Jang, Chung-Hwa Park, Chang Wook Kim, U Im Chang, Hae Lim Lee, Jeong Won Jang, Hee Yeon Kim, In-Yang Park, Fisseha Tekle, and Jung Hyun Kwon
- Subjects
Adult ,Perinatal transmission ,medicine.medical_specialty ,hepatitis b virus ,medicine.disease_cause ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Hepatitis B, Chronic ,Telbivudine ,Internal medicine ,antiviral agents ,medicine ,Humans ,030212 general & internal medicine ,postpartum ,Hepatitis B Antibodies ,lcsh:RC799-869 ,Tenofovir ,Molecular Biology ,Retrospective Studies ,Hepatitis B virus ,Hepatitis B Virus Surface Antibody ,Pregnancy ,Hepatology ,business.industry ,Transmission (medicine) ,Postpartum Period ,Antiviral therapy ,Infant, Newborn ,mother-to-child transmission ,Infant ,virus diseases ,medicine.disease ,Infectious Disease Transmission, Vertical ,Titer ,DNA, Viral ,030211 gastroenterology & hepatology ,Original Article ,Female ,lcsh:Diseases of the digestive system. Gastroenterology ,pregnancy ,business ,medicine.drug - Abstract
Background/Aims There have been numerous efforts to reduce mother-to-child transmission (MTCT) of hepatitis B virus (HBV) with antiviral agents during pregnancy. However, there are limited data regarding the outcomes of pregnant women after delivery. This study was performed to evaluate the efficacy of antiviral agents in preventing MTCT of HBV and maternal long-term outcomes. Methods The HBV-infected pregnant women treated with antiviral agents to prevent MTCT were retrospectively reviewed. Forty-one pregnant women who received telbivudine or tenofovir during late pregnancy (28-34 week) were analyzed. Hepatitis B virus surface antibody (HBsAb) positivity was tested in 43 infants after 7 months of birth. Eleven mothers were followed >1 year after delivery. Results The mean HBV DNA titer before antiviral therapy was 8.67 (6.60–9.49) log copies/mL, and the median age at delivery was 32 years (range, 22–40). Eleven patients were treated with tenofovir and 30 with telbivudine. The median duration was 57 days (range, 23–100), and the median HBV DNA titer at birth was 5.06 log copies/mL (range, 2.06–6.50). Antiviral treatments were associated with significant HBV DNA reduction (P12 months, and an antiviral agent was administered. Conclusions Antiviral treatment during late pregnancy effectively reduced MTCT. Long-term follow-up should be required in such cases. In addition, given that maternal biochemical flare occurred in 18% of mothers, re-administration of antiviral agents might be required.
- Published
- 2018
39. Effects of Plant Age and Root Damage on Internalization of Shiga Toxin-Producing Escherichia coli in Leafy Vegetables and Herbs
- Author
-
Amanda J. Deering, Yi-Ju Wang, and Hye-Ji Kim
- Subjects
0106 biological sciences ,food.ingredient ,Coriandrum ,agricultural water ,Lactuca ,Plant Science ,lcsh:Plant culture ,Horticulture ,E. coli ,01 natural sciences ,03 medical and health sciences ,food ,Sativum ,lcsh:SB1-1110 ,Transplanting ,Aquaponics ,0303 health sciences ,biology ,030306 microbiology ,Basilicum ,food and beverages ,hydroponics ,Hydroponics ,biology.organism_classification ,food safety ,aquaponics ,Brassica oleracea ,PCR detection ,010606 plant biology & botany ,indoor farming - Abstract
Our previous study reported that fresh produce grown in aquaponic and hydroponic systems can pose potential food safety hazards due to an accidental introduction of contaminated fish and cross-contamination between the systems. In this study, we examined the effects of plant species and age on the likelihood and level of internalization of Shiga toxin-producing Escherichia coli (STEC) in aquaponic and hydroponic systems. Four plant species, basil (Ocimum basilicum L. cv. Genovese), cilantro (Coriandrum Sativum L.), lettuce (Lactuca sativa cv. Cherokee), and kale (Brassica oleracea var. sabellica), received root damage treatment as seedlings before transplanting or mature plants at three weeks after transplanting by cutting off 1-cm tips of one-third of the roots. Enrichments and selective media were used for the isolation, and presumptive positive colonies were confirmed by PCR for the presence of stx1 gene in plant tissues, recirculating water, and fish feces collected at four weeks after transplanting. In hydroponic systems, STEC was found neither in the solution nor in the roots and leaves of all four plant species, possibly through improved sanitation and hygiene practices. However, consistent with our previous findings, STEC was found in the water, on the plant roots, and in the fish feces in aquaponic systems, even after thorough sanitation prior to the study. Regardless of plant age, STEC was internalized in the roots of all plant species when the roots were damaged, but there was no difference in the degree of internalization with STEC among plant species. STEC was present in the leaves only when seedlings received root damage treatment and were grown to maturity, indicating that root damage allows STEC to internalize in the roots within a week, but a longer period is required for STEC to internalize into the leaves. We concluded that root damage on seedlings can cause the internalization of E. coli O157:H7 in the edible parts of leafy vegetables and herbs in soilless production systems.
- Published
- 2021
- Full Text
- View/download PDF
40. Postoperative vertebral bone density reduction after pancreaticoduodenectomy for pancreatic cancer
- Author
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Hye Ji KIM, Huisong LEE, Dae Joon PARK, Seog Ki MIN, and Hyeon Kook LEE
- Subjects
General Materials Science - Published
- 2022
41. Characterizing Nutrient Composition and Concentration in Tomato-, Basil-, and Lettuce-based Aquaponic and Hydroponic Systems
- Author
-
Hye-Ji Kim and Teng Yang
- Subjects
0106 biological sciences ,lcsh:Hydraulic engineering ,Geography, Planning and Development ,Aquatic Science ,magnesium ,01 natural sciences ,Biochemistry ,Feed conversion ratio ,nitrogen ,Commercial fish feed ,Nutrient ,agricultural wastewater ,lcsh:Water supply for domestic and industrial purposes ,Cherry tomato ,lcsh:TC1-978 ,Aquaponics ,phosphorus ,Water Science and Technology ,lcsh:TD201-500 ,calcium ,biology ,Chemistry ,Nutrient management ,Crop yield ,04 agricultural and veterinary sciences ,Hydroponics ,biology.organism_classification ,Horticulture ,nutrient deficiency ,leaf chlorosis ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,010606 plant biology & botany - Abstract
Aquaponic nutrient studies often use various types of water containing high levels of mineral nutrients for water supply, making it difficult to accurately determine deficient nutrients limiting crop yield and quality across the systems. To avoid interference with background nutrients, we used reverse osmosis water in this study. The objectives were to identify critical nutrients that affect the yield and quality of cherry tomato-, basil-, and lettuce by characterizing nutrient composition and concentration in aquaponic systems in comparison to hydroponic systems. Daily release rate (mg L&minus, 1) of macronutrients derived from fish feed (41% protein, 1.1% phosphorus, 1% fish weight) was in decreasing order of SO4&ndash, S (16) >, PO4&ndash, P (2.4) >, NO3&ndash, N (1.0) >, K (0.8) >, Cl (0.5) >, NH4&ndash, N (0.4) >, Ca (0.2) >, NO2&ndash, N (0.13) >, Na (0.11) >, Mg (0.02), in which daily inputs of Mg and Ca in aquaponics were found to be only 1%-2% and 4%-6%, respectively, of those in hydroponics. Subsequently, the average concentrations of all nutrients were significantly lower in aquaponics than in hydroponics during a 3-month production except for Cl, NH4-N, NO2-N, and Na. The concentration of Mg remained below 5 mg L&minus, 1 in all aquaponic systems, while the concentration of Ca rapidly decreased in tomato-based aquaponics, especially during fruiting. SPAD value (chlorophyll content) was associated with concentrations of leaf N, Mg, and/or Ca. Specifically, lower SPAD value was correlated with lower leaf Mg and Ca for tomato and lower leaf Mg for basil but neither Mg nor Ca for lettuce. The aquaponic solution contained nearly six-times higher Na than the hydroponic solution, resulting in three-times higher Na concentration in the edible portion of the crops. Compared to a lettuce-based aquaponic system, tomato- and basil-based systems retained more desirable water quality parameters (i.e., stable pH, lower temperature), had lower electrical conductivity (EC) via greater biomass production and, therefore, more efficient nutrient removal, and had lower feed conversion rate and higher fish biomass increment. Regardless of crop species, vegetative shoot biomass was significantly reduced in aquaponics than in hydroponics. However, the marketable yield of tomatoes was similar between aquaponics and hydroponics, while those of basil and lettuce were reduced in aquaponics by 56% and 67%, respectively, in comparison to hydroponics. Our results highlighted potential solutions to design proper nutrient management practices essential for the development of successful aquaponic production systems. Considering that ingested fish feed does not provide sufficient levels of Mg and/or Ca for crop production, it is suggested to supplement Mg before crop transplanting and Ca before fruiting of fruity crops to improve crop growth and quality in aquaponic systems, especially when high-quality water is used for water supply.
- Published
- 2020
42. Effects of Hydraulic Loading Rate on Spatial and Temporal Water Quality Characteristics and Crop Growth and Yield in Aquaponic Systems
- Author
-
Hye-Ji Kim and Teng Yang
- Subjects
Water flow ,Brassica ,hydraulic retention time ,Plant Science ,010501 environmental sciences ,Horticulture ,lcsh:Plant culture ,01 natural sciences ,nitrogen ,Nutrient ,nutrient flow ,wastewater management ,Aquaponics ,lcsh:SB1-1110 ,phosphorus ,0105 earth and related environmental sciences ,biology ,fungi ,Deep water culture ,food and beverages ,hydroponics ,04 agricultural and veterinary sciences ,biology.organism_classification ,Hydroponics ,energy use efficiency ,deep water culture ,Shoot ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Environmental science ,Water quality - Abstract
Aquaponics is a rapidly growing food-production system integrating aquaculture and hydroponic crop production through an energy-intensive water recirculation process. Crop performance and yield in aquaponics are affected by essential and toxic nutrient levels in the root zone, which can be regulated by water flow rate. This study was conducted to examine the effects of hydraulic loading rate (HLR) on water quality and crop growth and yield in recirculating aquaponic systems set at three different loading rates: high (3.3 m3/m2/day, HFR, which is 12 times lower than recommended loading rate), medium (2.2 m3/m2/day, MFR), and low (1.1 m3/m2/day, LFR). Crop species varying in growth rate were examined for their optimal HLR: fast-growing Chinese cabbage (Brassica rapa) and lettuce (Lactuca sativa), medium-growing mustard (Brassica juncea) and chia (Salvia hispanica), and slow-growing basil (Ocimum basilicum) and Swiss chard (Beta vulgaris). Compared to LFR, HFR decreased water and leaf temperatures and total ammonium nitrogen (TAN) but increased dissolved oxygen and pH in aquaponic solution up to one and two weeks after transplant, respectively. HFR increased NO3&ndash, N concentration by 50 and 80%, respectively, compared to MFR and LFR, while reducing the exposure duration of roots to ammonia (NH3&ndash, N) and its peak concentration through rapid dissipation of the toxic compound. Lower electrical conductivity (EC) in HFR during the last two weeks of production was associated with higher plant nutrient uptake and greater biomass production. The leaf greenness, photosynthetic rate (Pn), and total plant N were significantly higher at HFR than LFR. Fish growth rate, fresh weight, and feed-conversion efficiency were also increased by HFR. The growth of fast-growing crops including total fresh weight, shoot fresh weight, leaf area, and Pn was not different between HFR and MFR, while HLR had less significant effects on the growth and performance (i.e., shoot fresh weight and whole plant photosynthesis) of slow-growing crops. In conclusion, the flow rate is an important component in aquaponic crop production as it affects spatial and temporal water characteristics and subsequently determines the growth and yield of the crops. HLR at 3.3 m3/m2/day was sufficient across the crops allowing better chemical and physical properties of the aquaponic solution for maximum yield and quality. HLR should be maintained at least at 2.2 m3/m2/day for the production of fast-growing crops but can be lowered for slow-growing crops.
- Published
- 2020
- Full Text
- View/download PDF
43. The Occurrence of Shiga Toxin-Producing E. coli in Aquaponic and Hydroponic Systems
- Author
-
Hye-Ji Kim, Yi Ju Wang, and Amanda J. Deering
- Subjects
0106 biological sciences ,Salmonella ,e. coli ,agricultural water ,Plant Science ,Horticulture ,Biology ,lcsh:Plant culture ,medicine.disease_cause ,01 natural sciences ,03 medical and health sciences ,Nutrient ,Listeria monocytogenes ,medicine ,Aquaponics ,lcsh:SB1-1110 ,Food science ,Feces ,0303 health sciences ,030306 microbiology ,business.industry ,pcr detection ,Hydroponics ,Food safety ,food safety ,Wastewater ,business ,010606 plant biology & botany ,indoor farming - Abstract
Food safety concerns have been raised over vegetables and herbs grown in aquaponics and hydroponics due to the reuse of wastewater and spent nutrient solutions. This study was conducted to determine the occurrence of foodborne pathogens in greenhouse-based aquaponic and hydroponic systems. Fish feces, recirculating water, roots, and the edible portions of lettuce, basil, and tomato were collected at harvest, and microbiological analyses were conducted for the bacterial pathogens Shiga toxin-producing Escherichia coli (STEC), Listeria monocytogenes, and Salmonella spp. Enrichments and selective media were used for the isolation, and presumptive positive colonies were confirmed by PCR. STEC was found in fish feces, in the water of both systems, and on the surface of the roots of lettuce, basil, and tomato regardless of the system. However, contaminated water did not lead to the internalization of STEC into the roots, leaves, and/or fruit of the plants. Meanwhile, L. monocytogenes and Salmonella spp. were not present in any samples examined. Our results demonstrated that there are potential food safety hazards for fresh produce grown in aquaponic and hydroponic production systems.
- Published
- 2020
44. Spectrochemical analysis of slippery loach skin and kelp using FTIR imaging
- Author
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Boknam Chae, Eunseok Seo, Hye Ji Kim, Jiho Kim, and Sang Joon Lee
- Subjects
Spectroscopy - Published
- 2022
45. Plant propagation for successful hydroponic production©
- Author
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Hye-Ji Kim, M.-Y. Lin, P. Langenhoven, and T. Yang
- Subjects
0106 biological sciences ,Agronomy ,Plant propagation ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Production (economics) ,04 agricultural and veterinary sciences ,Horticulture ,01 natural sciences ,010606 plant biology & botany - Published
- 2018
46. Statistical prediction of typhoon‐induced accumulated rainfall over the Korean Peninsula based on storm and rainfall data
- Author
-
Minyeong Kim, Il-Ju Moon, and Hye-Ji Kim
- Subjects
Atmospheric Science ,geography ,geography.geographical_feature_category ,Peninsula ,Climatology ,Typhoon ,Environmental science ,Statistical model ,Storm - Published
- 2019
47. Biomass and Phosphorus Accumulation and Partitioning of Geranium and Coleus in Response to Phosphorus Availability and Growth Phase
- Author
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Seunghyun Choi, Hye-Ji Kim, Jiayin Zhang, and Jingping Fan
- Subjects
0106 biological sciences ,food.ingredient ,greenhouse crops ,chemistry.chemical_element ,sustainable crop production ,nutrient use efficiency ,010501 environmental sciences ,Biology ,01 natural sciences ,phosphorus requirement ,Nutrient ,food ,Dry weight ,Solenostemon ,0105 earth and related environmental sciences ,fertilizer rate ,Phosphorus ,food and beverages ,Coleus ,Pelargonium ,biology.organism_classification ,Horticulture ,chemistry ,nutrient management ,Geranium ,Shoot ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
This study was conducted to examine plant biomass and phosphorus (P) accumulation and partitioning in response P availability and to determine the optimal P concentration during growth phases of two plant species with contrasting growth characteristics: geranium (Pelargonium hortorum Bailey) &rdquo, Bullseye Scarlet&rdquo, a flowering plant, and coleus (Solenostemon scutellarioides (L.) Codd) &rdquo, Chocolate Mint&rdquo, a foliage plant. Plants were grown in inert media (1:1 mixture of perlite and vermiculite) with complete nutrient solutions containing a range of P concentrations considered low (3 and 5 mg/L), intermediate (10 and 15 mg/L), and high (20 and 30 mg/L). Higher P rates logarithmically increased shoot and root dry mass of geranium and coleus plants regardless of the growth phase, but linearly enhanced flower dry mass of reproductive geranium plants resulting from the accelerated flower development. During the vegetative phase, the intermediate-P increased the shoot biomass production of geranium plants, but high-P was more effective for coleus plants. During the reproductive phase, however, the intermediate-P increased shoot biomass production of both geranium and coleus plants to the level achieved by high-P. The change from vegetative to reproductive phase increased the relative biomass to flowers, roots, and shoots of reproductive geranium plants and roots and shoots of reproductive coleus plants in decreasing orders, resulting in an increased root-to-shoot ratio. The P content of all plant parts showed a logarithmical increase with higher P rates for reproductive geranium plants but a linear increase for reproductive coleus plants. During the reproductive phase, a higher proportion of acquired P was allocated to flowers of low-P geranium plants than the roots of high-P coleus. Our results demonstrate that geranium plants require intermediate-P throughout the growth phases, while coleus plants require high-P during the vegetative phase and intermediate-P during the reproductive phase. P-use efficiency (PUE) ranged from 5% to 15% in high-P, which was improved with intermediate-P by 36% to 70%. To further improve PUE, the application method also needs to be taken into consideration such that the fertigation volume is reduced during the vegetative phase and increased before the reproductive phase.
- Published
- 2019
- Full Text
- View/download PDF
48. Peripheral Pain Modulation of Chrysaora pacifica Jellyfish Venom Requires Both Ca
- Author
-
Hye-Ji, Kim, Jin-Woo, Noh, Khulan, Amarsanaa, Sang-Chan, Jeon, Yoon-Sil, Yang, Na-Hye, Hwang, Eun-A, Ko, Young-Joon, Kang, and Sung-Cherl, Jung
- Subjects
Male ,Rats, Sprague-Dawley ,Cnidarian Venoms ,Dose-Response Relationship, Drug ,Injections, Subcutaneous ,Animals ,Neuralgia ,Calcium ,TRPA1 Cation Channel ,Pain Measurement ,Rats - Abstract
The venom of jellyfish triggers severe dermal pain along with inflammation and tissue necrosis, and occasionally, induces internal organ dysfunction. However, the basic mechanisms underlying its cytotoxic effects are still unknown. Here, we report one of the mechanisms involved in peripheral pain modulation associated with inflammatory and neurotoxic oxidative signaling in rats using the venom of jellyfish, Chrysaora pacifica (CpV). This jellyfish is identified by brown tentacles carrying nematocysts filled with cytotoxic venom that induces severe pain, pruritus, tentacle marks, and blisters. The subcutaneous injection of CpV into rat forepaws in behavioral tests triggered nociceptive response with a decreased threshold for mechanical pain perception. These responses lasted up to 48 h and were completely blocked by verapamil and TTA-P2, T-type Ca
- Published
- 2019
49. Cofactor specificity engineering of a long-chain secondary alcohol dehydrogenase from Micrococcus luteus for redox-neutral biotransformation of fatty acids
- Author
-
Jin Byung Park, Jeong Sun Kim, Myeong Ju Kim, Eun Ji Seo, and Hye Ji Kim
- Subjects
Molecular Dynamics Simulation ,010402 general chemistry ,01 natural sciences ,Redox ,Catalysis ,Cofactor ,Mixed Function Oxygenases ,Biotransformation ,Pseudomonas ,Materials Chemistry ,chemistry.chemical_classification ,Binding Sites ,biology ,010405 organic chemistry ,Fatty Acids ,Metals and Alloys ,General Chemistry ,Monooxygenase ,biology.organism_classification ,Pseudomonas putida ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Alcohol Oxidoreductases ,Kinetics ,Micrococcus luteus ,Enzyme ,chemistry ,Biochemistry ,Ceramics and Composites ,biology.protein ,bacteria ,NAD+ kinase ,Genetic Engineering ,Oxidation-Reduction - Abstract
Structure-based engineering of a NAD+-dependent secondary alcohol dehydrogenase from Micrococcus luteus led to a 1800-fold increase in catalytic efficiency for NADP+. Furthermore, the engineered enzymes (e.g., D37S/A38R/V39S/T15I) were successfully coupled to a NADPH-dependent Baeyer–Villiger monooxygenase from Pseudomonas putida KT2440 for redox-neutral biotransformations of C18 fatty acids into C9 chemicals.
- Published
- 2019
50. Nitrate in fruits and vegetables
- Author
-
Giuseppe Colla, Marios C. Kyriacou, Hye-Ji Kim, Youssef Rouphael, Colla, Giuseppe, Kim, Hyeji, Kyriacou, Marios C., and Rouphael, Youssef
- Subjects
0106 biological sciences ,Salinity ,Mushrooms ,Genotype ,Light ,Genotypes ,Turgor pressure ,Horticulture ,Biology ,Nitrate ,01 natural sciences ,Mushroom ,chemistry.chemical_compound ,Nutrient ,Cultivar ,Microbial inoculant ,fungi ,food and beverages ,Nitrates Genotypes ,04 agricultural and veterinary sciences ,Photosynthetic capacity ,Horticultural crop ,Light intensity ,chemistry ,Fertilization ,040103 agronomy & agriculture ,Postharvest ,0401 agriculture, forestry, and fisheries ,Horticultural crops ,010606 plant biology & botany - Abstract
The current article provides an updated review of scientific advances regarding nitrate accumulation in plant tissues and a critical examination of the genetic, agroenvironmental and postharvest factors that can modulate nitrate levels in a wide range of horticultural crops, including herbs, roots and tubers, inflorescences, buds, seeds, stems, and leafy vegetables, fungi as well as fruits. A refined classification of horticultural crops is presented according to the nitrate content of their edible product. The role of plant cultivar/morphotype and tissue age in nitrate accumulation is discussed along with the physiological role of nitrate as osmoticum in maintaining turgor and driving leaf expansion under conditions of variable photosynthetic capacity. Nitrate accumulation is examined in respect to key cultural practices, such as the timing-rate-form of N application and the use of plant biostimulants (natural substances and microbial inoculants), as well as the potential interaction with other nutrients (e.g., P, Ca, Mo and Cl). The influence of environmental conditions during plant growth (light intensity, spectral quality, photoperiod, air and root-zone temperature and atmospheric CO2 concentration), harvest stage and diurnal timing of harvest is assessed. Postharvest storage conditions (temperature, light, and duration) are discussed in respect to their effects on the putative endogenous conversion of nitrate residues to nitrites. Several approaches that may be adopted to reduce nitrate content in vegetables, fruits and herbs are analysed and warranted future research subjects are identified.
- Published
- 2018
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