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( Ga-young Song ),( Sung-hoon Jung ),( Seo-yeon Ahn ),( Mihee Kim ),( Jae-sook Ahn ),( Je-jung Lee ),( Hyeoung-joon Kim ),( Jang Bae Moon ),( Su Woong Yoo ),( Seong Young Kwon ),( Jung-joon Min ),( He 대한내과학회 2024 The Korean Journal of Internal Medicine Vol.39 No.2
Background/Aims: The prognostic significance of <sup>18</sup>F-fluorodeoxyglucose (FDG)-positron emission tomography-computed tomography (PET/CT) in peripheral T-cell lymphomas (PTCLs) are controversial. We explored the prognostic impact of sequential <sup>18</sup>F-FDG PET/CT during frontline chemotherapy of patients with PTCLs. Methods: In total, 143 patients with newly diagnosed PTCLs were included. Sequential <sup>18</sup>F-FDG PET/CTs were performed at the time of diagnosis, during chemotherapy, and at the end of chemotherapy. The baseline total metabolic tumor volume (TMTV) was calculated using the the standard uptake value with a threshold method of 2.5. Results: A baseline TMTV of 457.0 ㎤ was used to categorize patients into high and low TMTV groups. Patients with a high TMTV had shorter progression-free survival (PFS) and overall survival (OS) than those with a low TMTV (PFS, 9.8 vs. 26.5 mo, p = 0.043; OS, 18.9 vs. 71.2 mo, p = 0.004). The interim <sup>18</sup>F-FDG PET/CT response score was recorded as 1, 2-3, and 4-5 according to the Deauville criteria. The PFS and OS showed significant differences according to the interim <sup>18</sup>F-FDG PET/CT response score (PFS, 120.7 vs. 34.1 vs. 5.1 mo, p < 0.001; OS, not reached vs. 61.1 mo vs. 12.1 mo, p < 0.001). Conclusions: The interim PET/CT response based on visual assessment predicts disease progression and survival outcome in PTCLs. A high baseline TMTV is associated with a poor response to anthracycline-based chemotherapy in PTCLs. However, TMTV was not an independent predictor for PFS in the multivariate analysis.
Ga Young Kim,Jin Chul Joo,Bo Reum Ahn,Dae Hong Lee,Jae Roh Park,Chang Hyuk Ahn,Jong Min Oh 응용생태공학회 2018 Ecology and resilient infrastructure Vol.5 No.3
TiO₂-embedded expanded polystyrene (TiEPS) balls with powdered TiO₂ particles embedded on the surface of EPS were developed, and the growth inhibition of Chlorella ellipsoidea, a green algae, was evaluated. The experiment was conducted using four reactors with various conditions of (A) natural sunlight, (B) natural sunlight + TiEPS balls, (C) dark, and (D) dark + TiEPS balls on the roof of the building during five days. Based on the analysis of cell number, cell morphology, concentrations of chlorophyll-a and phaeopigments, both surface reactions in heterogeneous photocatalysis and light shielding could inhibit the growth of C. ellipsoidea. The highly reactive hydroxyl radicals (OH・) from TiEPS balls degraded the lipid cell membrane through the peroxidation reaction with the light shielding, eventually resulting in cell inactivation. Although dominant inhibitory effects on the growth of C. ellipsoidea were ambiguous, TiEPS balls were feasible to prevent and inhibit the excessive growth of algae in eutrophic water body.
Ga-Young Ahn,Shin-Young Park,Jisoo Park 글로벌지식마케팅경영학회 2017 Global Fashion Management Conference Vol.2017 No.07
In the world of SNS, once ordinary users get recognized for discriminated fashion taste, they affect other users’ choice of fashion products. Fashion companies capture the importance of these influencers and tries to take advantage of their ability. However, the benefits offered to influencers such as financial compensation may provoke negative consumer reactions. The purpose of this study is to identify what aspects of SNS influencers and how they influence other fashion consumers. We suggest that influencers’ self-disclosure and authenticity of posts are important factors which elicit positive response from consumers. We also investigate the psychological mechanism of envy which can mediate the impact of self-disclosure and authenticity on consumer response. This study was conducted by an online survey of 120 Korean women in their 20s and 30s with a 2 x 2 between-group experimental design. The data was collected from 28 November to 5 December 2016. The collected data was analyzed using SPSS 23.0 for ANOVA analysis and regression analysis. The results were as follows. The main effect of authenticity was confirmed, while self-disclosure did not play a significant role, which indicates authenticity is the main factor in exercising influence on consumer response. The interaction of authenticity and self-disclosure was also observed. The participants of high in both self-disclosure and authenticity showed the strongest consumer reaction. However, the participants of high self-disclosure and low authenticity induced the weakest consumer response. For the impacts of self-disclosure and authenticity on envy, the participants exposed to the condition of both high self-disclosure and authenticity showed benign envy. On the other hand, malicious envy was aroused when both self-disclosure and authenticity were low. In relations between authenticity and consumer response, partial mediating effect of benign envy and malicious envy was confirmed. But, there was no mediating effect between self-disclosure and consumer response. This research on consumer response to influencers’ posts will provide key implications to fashion companies in building marketing strategies. In order for influencers' posts displaying their daily lives to have a positive impact on consumer response, not only self-disclosure but authenticity has to be considered. Such posts can induce benign envy and subsequently impact consumers indirectly. Influencers’ posts which narrow the gap between daily lives and products and raise the authenticity are important keys to successful marketing.