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Jeong, Hae Jin,Lim, An Suk,Lee, Kitack,Lee, Moo Joon,Seong, Kyeong Ah,Kang, Nam Seon,Jang, Se Hyeon,Lee, Kyung Ha,Lee, Sung Yeon,Kim, Mi Ok,Kim, Ji Hye,Kwon, Ji Eun,Kang, Hee Chang,Kim, Jae Seong,Yih, The Korean Society of Phycology 2017 ALGAE Vol.32 No.2
The ichthyotoxic Cochlodinium polykrikoides red tides have caused great economic losses in the aquaculture industry in the waters of Korea and other countries. Predicting outbreak of C. polykrikoides red tides 1-2 weeks in advance is a critical step in minimizing losses. In the South Sea of Korea, large C. polykrikoides red tide patches have often been recorded offshore and transported to nearshore waters. To explore the processes of offshore C. polykrikoides red tides, temporal variations in 3-dimensional (3-D) distributions of red tide organisms and environmental parameters were investigated by analyzing 4,432 water samples collected from 2-5 depths of 60 stations in the South Sea, Korea 16 times from May to Nov, 2014. In the study area, the vegetative cells of C. polykrikoides were found as early as May 7, but C. polykrikoides red tide patches were observed from Aug 21 until Oct 9. Cochlodinium red tides occurred in both inner and outer stations. Prior to the occurrence of large C. polykrikoides red tides, the phototrophic dinoflagellates Prorocentrum donghaiense (Jun 12 to Jul 11), Ceratium furca (Jul 11 to Aug 21), and Alexandrium fraterculus (Aug 21) formed red tides in sequence, and diatom red tides formed 2-3 times without a certain distinct pattern. The temperature for the optimal growth of these four red tide dinoflagellates is known to be similar. Thus, the sequence of the maximum growth rates of P. donghaiense > C. furca > A. fraterculus > C. polykrikoides may be partially responsible for this sequence of red tides in the inner stations following high nutrients input in the surface waters because of heavy rains. Furthermore, Cochlodinium red tides formed and persisted at the outer stations when $NO_3$ concentrations of the surface waters were < $2{\mu}M$ and thermocline depths were >20 m with the retreat of deep cold waters, and the abundance of the competing red-tide species was relatively low. The sequence of the maximum swimming speeds and thus potential reachable depths of C. polykrikoides > A. fraterculus > C. furca > P. donghaiense may be responsible for the large C. polykrikoides red tides after the small blooms of the other dinoflagellates. Thus, C. polykrikoides is likely to outgrow over the competitors at the outer stations by descending to depths >20 m and taking nutrients up from deep cold waters. Thus, to predict the process of Cochlodinium red tides in the study area, temporal variations in 3-D distributions of red tide organisms and environmental parameters showing major nutrient sources, formation and depth of thermoclines, intrusion and retreat of deep cold waters, and the abundance of competing red tide species should be well understood.
In-orbit Stray light Performance Simulation for Geostationary Ocean Color Imagers
Jeong, Yu-Kyeong,Jeong, Soo-Min,Ryu, Dong-Ok,Kim, Sug-Whan,Hong, Jin-Suk,Youn, Heong-Sik,Woo, Sun-Hee,Kim, Seong-Hui 한국우주과학회 2009 한국우주과학회보 Vol.18 No.2
We report stray light modeling and analysis results for the current and proposed next generation ocean color imagers with Sun and the target area around Korean penninsular as viewed from geostationary orbit. The imagers used in this study are GOCI of 140m
Jeong, Jin-Ok,Han, Ji Woong,Kim, Jin-Man,Cho, Hyun-Jai,Park, Changwon,Lee, Namho,Kim, Dong-Wook,Yoon, Young-Sup Ovid Technologies Wolters Kluwer -American Heart A 2011 Circulation research Vol.108 No.11
<P>Bone marrow (BM)-derived mesenchymal stem cells (MSCs) hold great promise for cardiovascular cell therapy owing to their multipotency and culture expandability.</P>
Applicability and Safety of in Vitro Skin Expansion Using a Skin Bioreactor: A Clinical Trial
Jeong, Cheol,Chung, Ho Yun,Lim, Hyun Ju,Lee, Jeong Woo,Choi, Kang Young,Yang, Jung Dug,Cho, Byung Chae,Lim, Jeong Ok,Yoo, James J.,Lee, Sang Jin,Atala, Anthony J. Korean Society of Plastic and Reconstructive Surge 2014 Archives of Plastic Surgery Vol.41 No.6
Background Tissue expansion is an effective and valuable technique for the reconstruction of large skin lesions and scars. This study aimed to evaluate the applicability and safety of a newly designed skin expanding bioreactor system for maximizing the graft area and minimizing the donor site area. Methods A computer-controlled biaxial skin bioreactor system was used to expand skin in two directions while the culture media was changed daily. The aim was to achieve an expansion speed that enabled the skin to reach twice its original area in two weeks or less. Skin expansion and subsequent grafting were performed for 10 patients, and each patient was followed for 6 months postoperatively for clinical evaluation. Scar evaluation was performed through visual assessment and by using photos. Results The average skin expansion rate was $10.54%{\pm}6.25%$; take rate, $88.89%{\pm}11.39%$; and contraction rate, $4.2%{\pm}2.28%$ after 6 months. Evaluation of the donor and recipient sites by medical specialists resulted in an average score of 3.5 (out of a potential maximum of 5) at 3 months, and 3.9 at 6 months. The average score for patient satisfaction of the donor site was 6.2 (out of a potential maximum of 10), and an average score of 5.2 was noted for the recipient site. Histological examination performed before and after the skin expansion revealed an increase in porosity of the dermal layer. Conclusions This study confirmed the safety and applicability of the in vitro skin bioreactor, and further studies are needed to develop methods for increasing the skin expansion rate.
( Jin Yong Lee ),( Yun Jae Seol ),( Dong Woo Shin ),( Dae Young Kim ),( Hong Woo Chun ),( Bo Young Kim ),( Shin Ok Jeong ),( Sang Hyok Lim ),( An Soo Jang ) 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.1
The drug reaction with eosinophilia and systemic symptom (DRESS) syndrome is a severe adverse drug-induced reaction which includes a severe skin eruption, fever, hematologic abnormalities (eosinophilia or atypical lymphocytes) and internal organ involvement. The most frequently reported drug was anticonvulsants. The diagnosis of DRESS syndrome is challenging because the pattern of cutaneous eruption and the types of organs involved are various. The treatments for DRESS syndrome are culprit drug withdrawal and corticosteroids. Here we report a 71-year-old man with skin eruption with eosinophilia and hepatic and renal involvement that appeared 4 weeks after he had taken antituberculosis drugs (isoniazid, ethambutol, rifampicin, and pyrazinamide), and resolved after stopping anti-tuberculosis drugs and the administration of systemic corticosteroids. DRESS recurred after re-challenging isoniazid, we identified isoniazid was causative drug.
Ok, Jin Hee,Jeong, Hae Jin,Kang, Hee Chang,Park, Sang Ah,Eom, Se Hee,You, Ji Hyun,Lee, Sung Yeon The Korean Society of Phycology 2021 ALGAE Vol.36 No.4
To explore the ecophysiological characteristics of the kleptoplastidic dinoflagellate Shimiella gracilenta, we determined its spatiotemporal distribution in Korean coastal waters and growth and ingestion rates as a function of prey concentration. The abundance of S. gracilenta at 28 stations from 2015 to 2018 was measured using quantitative real-time polymerase chain reaction. Cells of S. gracilenta were detected at least once at all the stations and in each season, when temperature and salinity were 1.7-26.4℃ and 9.9-35.6, respectively. Moreover, among the 28 potential prey species tested, S. gracilenta SGJH1904 fed on diverse prey taxa. However, the highest abundance of S. gracilenta was only 3 cells mL<sup>-1</sup> during the study period. The threshold Teleaulax amphioxeia concentration for S. gracilenta growth was 5,618 cells mL<sup>-1</sup>, which was much higher than the highest abundance of T. amphioxeia (667 cells mL<sup>-1</sup>). Thus, T. amphioxeia was not likely to support the growth of S. gracilenta in the field during the study period. However, the maximum specific growth and ingestion rates of S. gracilenta on T. amphioxeia, the optimal prey species, were 1.36 d<sup>-1</sup> and 0.04 ng C predator<sup>-1</sup> d<sup>-1</sup>, respectively. Thus, if the abundance of T. amphioxeia was much higher than 5,618 cells mL<sup>-1</sup>, the abundance of S. gracilenta could be much higher than the highest abundance observed in this study. Eurythermal and euryhaline characteristics of S. gracilenta and its ability to feed on diverse prey species and conduct kleptoplastidy are likely to be responsible for its common spatiotemporal distribution.