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Young-Chul Kim,Hyun-Hee Chae,Sang-Heock Oh,Seung-Ho Choi2,Moon-Pyo Hong3,Gi-Heum Nam,Jae-Yoon Choi,Hyun-Sook Choi,Kyu-Song Lee 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2
Yongneup wetland protected area, the only high moor in Korea, is a core area to conserve biodiversity. Even though the Yongneup wetland protected area is relatively small, various plant species are distributed in the Yongneup wetland protected area because it includes various habitats showing different environmental gradients. Vascular plants distributed in the Yongneup wetland protected area were identified as a total of 376 taxa that is composed of 73 families, 217 genera, 322 species, 3 subspecies, 44 varieties and 7 forms. For endangered plants designated by the Ministry of Environment, 5 species including Trientalis europaea var. arctica, Lilium dauricum, Halenia corniculata, Lychnis wilfordii and Menyanthes trifoliata were found and 34 taxa were confirmed to be distributed only in the mountainous wetland habitats. Regarding naturalized plants, a total of 11 taxa were distributed, but most of them were distributed in the areas where artificial interference has occurred. And in areas inside the wetlands that are relatively well preserved, 2 species of Bidens frondosa and Erigeron annuus were observed. In this study, the occurrence and distribution of Pseudostellaria baekdusanensis M. Kim, which was recently found in Mt. Baekdu and reported as a new species, were identified in the Yongneup wetland protected area. A wetland is a very vulnerable area to drastic environmental changes and damages to its ecosystem could cause the extinction of rare plant species which are distributed only in the wetlands. Therefore, it is mandatory that current status of the Yongneup wetland protected area is evaluated and actions to prevent rapid environmental changes are taken. Fourteen separate investigations were conducted in 2013 and another four in 2014, to evaluate current status of the Yongneup wetland protected area. These investigations have provided us the basic information for future actions of conservation and restoration.
Factors predictive of the failure of medical treatment in patients with pleural infection
( Sung Kyoung Kim ),( Chul Ung Kang ),( So Hyang Song ),( Deog Gon Cho ),( Kyu Do Cho ),( Chi Hong Kim ) 대한내과학회 2014 The Korean Journal of Internal Medicine Vol.29 No.5
Background/Aims: The clinical outcomes of some patients with pleural infectionmay be favorable with medical treatment alone, but in others, the diseaseprogresses and requires additional surgical treatment. However, little is knownabout the factors affecting this difference. The aim of this study was to investigatethe factors predictive of failure of medical treatment in patients with pleuralinfection. Methods: A cohort of 127 consecutive patients who were admitted to the hospitalwith pleural infection was studied. Clinical manifestations and laboratory findingsin patients in whom medical treatment succeeded or failed were reviewed. Results: In univariate analysis, the significant factors associated with medicaltreatment outcome were age, smoking history, duration of chief complaint, serumalbumin level, and pleural fluid glucose and lactate dehydrogenase levels (p <0.05). Multivariate logistic regression analysis identified age and duration of chief complaintas independent predictive factors for failure of medical treatment, withodds ratios of 0.871 (p = 0.013) and 0.797 (p = 0.026), respectively. Receiver operatingcharacteristic curve analysis determined cutoff values of 50.5 years for age and 4.5days for duration of chief complaint. Conclusions: We demonstrated that a younger age < 50.5 years and shorter durationof chief complaint < 4.5 days were independent predictive factors for thefailure of medical treatment in patients with pleural infection. This suggeststheir role as evaluative criteria in setting indications for the optimal treatment inpatients with pleural infection. A larger, prospective study is required to confirmthese findings.
Demographic and Clinical Characteristics of Primary Frozen Shoulder in a Korean Population
Chul-Hyun Cho,Tae Won Koo,Nam-Su Cho,Kyoung-Jin Park,Bong Gun Lee,Dongju Shin,Sungwook Choi,Seung-Hyun Cho,Myung-Sun Kim,Sang-Hun Ko,Chul-Hong Kim,Jin-Young Park,Yon-Sik Yoo 대한견주관절의학회 2015 대한견주관절의학회지 Vol.18 No.3
Background: The aim of this study was to investigate the demographic and clinical characteristics of patients with primary frozen shoulder in a Korean population. Methods: A total of 1,373 patients whose shoulders were diagnosed with primary frozen shoulder across 11 resident-training hospitals were reviewed retrospectively. Various demographic characteristics and clinical characteristics according to gender and presence of diabetes were evaluated. Results: The average age of patients was 55.4 years. Gender proportion was 58.3% females and 41.7% males. The frozen shoulder involved the non-dominant arm in 60.7% of patients and the bilateral arms in 17.6% of patients. The average duration of symptoms was 8.9 months, and 51.3% of patients had experienced nocturnal pain. Comorbidities associated with frozen shoulder in our sample of patients included diabetes (18.7%), cardiovascular diseases (17.7%), thyroid diseases (5.4%), and cerebrovascular diseases (3.6%). The diabetic group was correlated with the following demographic and clinical characteristics: old age, involvement of the dominant arm, nocturnal pain, long duration of symptoms, and no history of trauma. Further, we found that, in males, having a frozen shoulder was significantly correlated with a history of trauma; in females, having a frozen shoulder was significantly correlated with having thyroid diseases. Conclusions: These demographic data of primary frozen shoulder in the Korean population were consistent with those of previously reported epidemiologic studies. Primary frozen shoulder with diabetes was correlated with old age, bilateral involvement, long duration of symptoms, and nocturnal pain.
Antiproliferative effects of zinc-citrate compound on hormone refractory prostate cancer.
Hong, Sung Hoo,Choi, Yong Sun,Cho, Hyuk Jin,Lee, Ji Youl,Kim, Joon Chul,Hwang, Tae Kon,Kim, Sae Woong China National Publications ImportExport Corp., Ex 2012 Chinese Journal of Cancer Research Vol.24 No.2
<P>To investigate the antiproliferative effects of zinc-citrate compound on hormone refractory prostate cancer (HRPC).</P>
Application of GTH-like algorithm to Markov modulated Brownian motion with jumps
Hong, Sung-Chul,Ahn, Soohan The Korean Statistical Society 2021 Communications for statistical applications and me Vol.28 No.5
The Markov modulated Brownian motion is a substantial generalization of the classical Brownian Motion. On the other hand, the Markovian arrival process (MAP) is a point process whose family is dense for any stochastic point process and is used to approximate complex stochastic counting processes. In this paper, we consider a superposition of the Markov modulated Brownian motion (MMBM) and the Markovian arrival process of jumps which are distributed as the bilateral ph-type distribution, the class of which is also dense in the space of distribution functions defined on the whole real line. In the model, we assume that the inter-arrival times of the MAP depend on the underlying Markov process of the MMBM. One of the subjects of this paper is introducing how to obtain the first passage probabilities of the superposed process using a stochastic doubling algorithm designed for getting the minimal solution of a nonsymmetric algebraic Riccatti equation. The other is to provide eigenvalue and eigenvector results on the superposed process to make it possible to apply the GTH-like algorithm, which improves the accuracy of the doubling algorithm.
Inhibition of S6K1 enhances dichloroacetate-induced cell death
Hong, Sung-Eun,Shin, Keong-Sub,Lee, Yun-Han,Seo, Sung-Kum,Yun, Sun-Mi,Choe, Tae-Boo,Kim, Hyun-Ah,Kim, Eun-Kyu,Noh, Woo Chul,Kim, Jong-Il,Hwang, Chang-Sun,Lee, Jin Kyung,Hwang, Sang-Gu,Jin, Hyeon-Ok,Pa Springer-Verlag 2015 JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY Vol.141 No.7
Chul Young Kim,Hee Ju Lee,Eun Ha Lee,Sang Hoon Jung,Dong-Un Lee,Suk Woo Kang,Sae Jin Hong,Byung-Hun Um 한국식품과학회 2008 Food Science and Biotechnology Vol.17 No.4
This study employed high performance liquid chromatography (HPLC) coupled to an on-line ABTS<sup>+</sup> radical scavenging detection (RSD) system along with HPLC-electro spin impact/mass spectrometry (ESI/MS), to rapidly determine and identify antioxidant compounds occurring in blueberry extract. The extract was separated by HPLC, and then the radical scavenging activities of the separated compounds were evaluated by the on-line coupled ABTS<sup>+</sup>-RSD system. The negative peaks of the ABTS<sup>+</sup>-RSD system, which indicates the presence of antioxidant activity, were monitored by measuring the decrease in absorbance at 734 nm. The active components in the blueberry extract were identified by HPLC-ESI/MS using their MS spectra and retention times. According to the data acquired from the on-line HPLC-ABTS<sup>+</sup>-based assay and HPLC-ESI/MS systems, the antioxidant compounds detected in the blueberry extract were identified as chlorogenic acid and 11 anthocyanins.