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Ko, Kyoungtae,Kim, Sung Won,Lee, Hong-Jin,Hwang, In Gul,Kim, Bok Chul,Kee, Won-Seo,Kim, Young-Seog,Gihm, Yong Sik Elsevier 2017 Sedimentary geology Vol.358 No.-
<P><B>Abstract</B></P> <P>The Cretaceous Beolgeumri Formation is composed of laminated mudstones intercalated with sandstones, chert, and a bed of lapilli tuff that were deposited in a lacustrine environment at the terminal part of a regional strike-slip fault systems on the southwestern Korean Peninsula. The Beolgeumri Formation contains various types of soft sediment deformation (SSD) structures that are characterized by a wide extent (<4km), lateral continuity (<200m), and vertical repetition. The SSD structures can be classified into six categories based on their morphological features and deformation styles: 1) fold structures, 2) load structures, 3) water-escape structures, 4) rip-down structures, 5) boudin structures, and 6) synsedimentary fault structures. Field examination of SSD structures together with an analysis of the sedimentological records of the Beolgeumri Formation indicate that the SSD structures formed largely by liquefaction and/or fluidization triggered by ground shaking during earthquakes. To constrain the timing of the development of SSD structures in the Beolgeumri Formation, we conducted sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon age dating of block sized lithic clasts bearing volcaniclastic deposits that conformably underlie (the Mangryeongbong Tuff) and overlie (the Ttandallae Tuff) the Beolgeumri Formation. The Mangryeongbong and Ttandallae Tuffs have ages of 86.63±0.83Ma and 87.24±0.36Ma, respectively, indicating that the Beolgeumri Formation was deposited during a short interval between major volcanic eruptions. The large lithic clasts of volcaniclastic deposits suggest that the Beolgeumri Formation was deposited adjacent to an active volcanic edifice(s). Syndepositional magmatic activities are suggested by the occurrence of a lapilli tuff bed in the Beolgeumri Formation and an igneous intrusion (intermediate sill) that is crosscut by a sand dike, as well as the similar age results of the underlying and overlying volcaniclastic deposits. Thus, we infer that the earthquakes that caused the development of SSD structures in the study area were closely related to syndepositional magmatic activities, as is the case for modern tectonic earthquakes around active volcanoes.</P>
A retrospective analysis of ibrutinib outcomes in relapsed or refractory mantle cell lymphoma
Yong-Pyo Lee,Ye Ji Jung,Junhun Cho,Young Hyeh Ko,Won Seog Kim,Seok Jin Kim,Sang Eun Yoon 대한혈액학회 2023 Blood Research Vol.58 No.4
Background While treatment strategies for mantle cell lymphoma (MCL) have evolved, patients often experience disease progression and require additional treatment therapies. Ibrutinib presents a promising option for relapsed or refractory MCL (RR-MCL). This study investigated real-world treatment outcomes of ibrutinib in patients with RR-MCL. Methods A single-center retrospective analysis investigated clinical characteristics and survival outcomes of patients with RR-MCL, treated with ibrutinib. Results Forty-two patients were included, with 16 received rituximab and bendamustine, and 26 receiving anthracycline-based regimens as front-line treatment. During a median follow- up of 46.0 months, the response rate to ibrutinib was 69%, with 12 CRs and 8 partial responses. Disease progression (54.8%) and adverse events (11.9%) were the primary reasons for discontinuation. Median progression-free survival (PFS) and overall survival (OS) were approximately 16.4 and 50.1 months, respectively. Patients older than 70 years (P =0.044 and P=0.006), those with splenomegaly (P =0.022 and P =0.006), and those with a high-risk simplified Mantle Cell Lymphoma International Prognostic Index (sMIPI) (P <0.001 and P <0.001) exhibited siginificantly inferior PFS and OS. Notably, patients with a high-risk sMIPI relapsed earlier. Post-ibrutinib treatment yilded an OS of 12.2 months, while clinical trial participants demonstrated superior survival compared to those receiving chemotherapy alone. Conclusion This study underscores the importance of considering patient characteristics before administering ibrutinib as salvage therapy. Early relapse was associated with poor outcomes, highlighting the need for novel therapeutic strategies.
Ko, Min-Soo,Kim, Yong-Seog The Korean Infomation Display Society 2007 Journal of information display Vol.8 No.2
MgO thick film for ac-PDPs was formed via electrophoresis deposition process and its effect on luminance and luminance efficiency were evaluated. The electrophoresis deposition process of MgO thick film was optimized through parametric study and defects levels in MgO powders was evaluated using cathodoluminescence spectra measurements. The results demonstrate a possibility of using MgO thick film as electron emission layer for ac-PDPs.
김용기(Yong Ki Kim),김인주(In Joo Kim),강양호(Yang Ho Kang),손석만(Seok Man Son),이경석(Kyoung Seog Lee),이재복(Jae Bok Lee),서봉직(Bong Jik Seo),박준상(June Sang Park),고명연(Myung Yun Ko),손성표 대한핵의학회 1995 핵의학 분자영상 Vol.29 No.4
N/A Bone scan is a very sensitive diagnostic imaging test for detecting bone and joint disorders. So it might be useful in the diagnosis of temporomandibular disorders of the joint origin. Thus, the effectiveness of bone scan for detecting temporomandibular joint(TMJ) diseases and differentiating the TMJ disc displacement from the TMJ arthritis was evaluated. Bone scan was done in 21 patients with TMJ disc displacement(l3 unilaterally affected, 8 bilaterally affected), 26 patients with TMJ arthritis(23 unilateral, 3 bilateral), and 39 volunteers with no signs, symtoms, or history of TMJ disease TMJ simple uptake rate(SUR) and difference of both TMJ SUR were calculated from the 100,000 count lateral image of head and neck region in Tc-99m MDP bone scan. Transcranial and panorama X-ray examination was also done in all patients. TMJ SUR(%) were 1.673±0.606 in TMJs affected with arthritis, 1.350±0.351 in TMJs affected with disc displacement, and 1.084±0.172 in TMJs of controls Significant differences were demonstrated among them(p〈001). Difference of bith TMJ SUR was highest in patients with unilateral TMJ arthritis(0.608±0.533, p〈001), and there is no significant difference between that of controls and that of unilateral TMJ disc displacement patients(0.062±0.063 vs 0.122±0.100). TMJ SUR of joint with bone change on X-ray finding was not significantly different from that of joint with normal X-ray finding. Those in patients with unilateral TMJ disc displacement(69.6% and 87% vs 23.1% and 23%). The proportions of patients with increased TMJ SUR and difference of both TMJ SUR(〉mean+2SD of controls) in unilateral TMJ arthritis patients were significantly higher than those in patients with unilateral TMJ disc displacement(69.6% and 87% vs 23.1% and 23%). Conclusively, bone scan may help to detect TMJ disease and differentiate TMJ disc displacement from TMJ arthritis.
Observation of sperm-head vacuoles and sperm morphology under light microscope
Park, Yong-Seog,Park, Sol,Ko, Duck Sung,Park, Dong Wook,Seo, Ju Tae,Yang, Kwang Moon The Korean Society for Reproductive Medicine 2014 Clinical and Experimental Reproductive Medicine Vol.41 No.3
Objective: The presence of sperm-head vacuoles has been suspected to be deleterious to the outcomes of assisted reproductive technology (ART). It is difficult to accurately distinguish morphologically abnormal sperm with vacuoles under a light microscope. This study was performed to analyze the result of the observation of sperm-head vacuoles using Papanicolaou staining under a light microscope and whether the male partner's age affects these vacuoles. Methods: Sperm morphology with vacuoles was evaluated using Papanicolaou staining and observed under a light microscope ($400{\times)$) in 980 men. The normal morphology was divided into three categories (group A, <4% of normal morphology; group B, 4%-14% of normal morphology; and group C, >14% of normal morphology). The criteria for the sperm-head vacuoles were those given in the World Health Organization manual. For the analysis of the age factor, the participants were divided into the following groups: 26-30 years, 31-35 years, 36-40 years, 41-45 years, and 46-50 years. Results: The percentage of sperm-head vacuoles increased with normal sperm morphology (group A vs. groups B, C) (p<0.05). In the case of the age factor, a statistically significant difference was not observed across any of the age groups. Conclusion: A majority of the sperm-head vacuoles showed a statistically significant difference among normal morphology groups. Therefore, we should consider the probability of the percentage of sperm-head vacuoles not increasing with age but with abnormal sperm morphology. A further study is required to clarify the effect of the sperm-head vacuoles on ART outcomes.
The clinical significance of activated p-AKT expression in peripheral T-cell lymphoma.
Hong, Jung Yong,Hong, Min Eui,Choi, Moon Ki,Chang, Wonjin,Do, In-Gu,Jo, Ji-Suk,Jung, Sin-Ho,Park, Silvia,Kim, Seok Jin,Ko, Young Hyeh,Kim, Won Seog Potamitis Press 2015 Anticancer research Vol.35 No.4
<P>The oncogenic PI3K/serine-threonine kinase (PI3K/AKT) pathway is a downstream pathway of B-cell receptor (BCR) signaling pathway and plays a crucial role in the pathogenesis of B-cell lymphoma. However, there have been preclinical data showing PI3K/AKT pathway activation in T-cell lymphoma, with in different mechanisms from those in B-cell lymphoma. In this study, we investigated the impact of p-AKT expression on clinical outcomes of peripheral T-cell lymphoma (PTCL).</P>