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Anzhela Tsoy,Ki-Dong Lee 한국지능정보시스템학회 2013 한국지능정보시스템학회 학술대회논문집 Vol.2013 No.11
In this paper we investigate market reaction on various corporate announcements and main motives causing investors to trade around them within three years of IPO dates. Our research based on IPO companies listed on KOSDAQ market from January 2000 to September 2012 and concentrates on three disclosures – bonus issue, seasoned equity offer and new investment in facilities announcements. We find that market positively react on bonus issues and seasoned equity offers, but negatively on new investment announcements. Trading volume increases before the positive events and all investor groups actively buy shares in these periods. For the negative events only institution traders show active selling. Overall, institutions act as momentum traders and individuals with foreigners as contrarian traders.
Anzhela Tsoy,Ki-Dong Lee(이기동) 한국지능정보시스템학회 2014 지능정보연구 Vol.20 No.1
In this paper, we investigate intellectual reaction differences among market participants to various corporate information announcements and the main information prompting investors to trade. Our research is based on IPO companies listed on the KOSDAQ exchange from January 2000 to September 2012 and concentrates on three information disclosures ? bonus issue, seasoned equity offer, and new investment in facilities announcements. We find that intellectual market participants react positively to bonus issues and seasoned equity offers, but negatively to new investment announcements. Market trading volume increases before the positive events and all cgroups actively buy shares during these periods. For the negative events, only institution participants show active selling. Overall, institutions act as momentum traders, and individuals and foreigners as contrarian traders. We also discuss the implications of this study.
Irina Tsoy Nizamutdinova,서한극,장기철,김혜정,이재흔 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.1
Heme oxygenase-1 (HO-1) plays a preventive role in oxidative stress. In contrast, COX-2 is involved in the pathogenesis of many inflammatory diseases, thus COX-2 inhibitor is believed to exert anti-inflammatory properties by blocking COX-2. Recently, however, salicylate the active metabolite of aspirin showed COX-independent anti-inflammatory effects through induction of HO-1. Thus, we hypothesized that HO-1 are induced as an adaptive response to sodium nitroprusside (SNP) and play a protective role against cytotoxicity. Moreover, we investigated the protective effect of NS398 known as a selective COX-2 inhibitor on SNP-mediated cytotoxicity, and whether the protective effect of NS398 is due to COX-2 inhibition or not. SNP induced cytotoxicity in a dose-dependent manner, which was enhanced by inhibition of HO-1, suggesting that HO-1 acts in an adaptive response to SNP. Interestingly, NS398 decreased SNP-mediated cytotoxicity whereas COX-2 siRNA did not. Furthermore, NS398 enhanced SNP-induced HO-1 induction even though NS398 alone failed to induce HO-1 protein expression. In addition, NS398 enhanced SNP-induced COX-2, even though NS398 effectively inhibited SNP-mediated PGE2 production. These results demonstrate that NS398 exerts cytoprotective effects by inducing HO-1 independent of COX-2 inhibition.
Ira Tsoy,Irina Prushkovskaya,Kirill Aksentov,Anatoly Astakhov 한국해양과학기술원 2015 Ocean science journal Vol.50 No.2
Siliceous unicellular microalgae - diatoms and silicoflagellates from sediments in Amur Bay were analyzed with high temporal resolution to examine changes over the last 150 years. The age of sediments was estimated from unsupported 210Pb controlled by 137Cs. Siliceous microalgae examined in each cm of two sediment cores demonstrated significant changes in the ecological structure of the assemblages that reflected changes in sedimentation conditions. During the years 1860-1910 the sediments accumulated under the great influence of river runoff. For about the next 50 years the number of freshwater species and marine benthic diatoms in sediments sharply declined, which is probably connected with the weakening of the effects of river runoff due to deforestation. Since the early 1960s the sedimentation conditions in the Amur Bay changed significantly. Marine planktonic diatoms and silicoflagellates began to prevail in sediments and this reflects increasing microphytoplankton productivity. One consequence of this was the formation of seasonal bottom hypoxia in Amur Bay. The ecological structure of diatom and silicoflagellate assemblages indicates that the sea level began to rise since the early 1960s and this corresponds to the water and air temperature increase in the area for that period. The obtained data suggest that the environmental changes over the last 150 years in Armur Bay are associated with the weakening of river runoff due to deforestation, sea level rise caused by global warming, and the increase of siliceous microplankton productivity that resulted in the formation of seasonal bottom hypoxia.
Nizamutdinova, Irina Tsoy,Jin, Yong Chun,Chung, Jong Il,Shin, Sung Chul,Lee, Sung Joong,Seo, Han Geuk,Lee, Jae Heun,Chang, Ki Churl,Kim, Hye Jung WILEY-VCH Verlag 2009 Molecular Nutrition & Food Research Vol.53 No.11
<P>Hyperglycemia, abnormal lipid and antioxidant profiles are the most usual complications in diabetes mellitus. Thus, in this study, we investigated the anti-diabetic and anti-oxidative effects of anthocyanins (ANT) from black soybean seed coats in streptozotocin (STZ)-induced diabetic rats. The administration of ANT markedly decreased glucose levels and improved heart hemodynamic function (left ventricular end diastolic pressure, ±dp/dt parameters). ANT not only enhanced STZ-mediated insulin level decreases, but also decreased the triglyceride levels induced by STZ injection in serum. Diabetic rats exhibited a lower expression of glucose transporter 4 proteins in the membrane fractions of heart and skeletal muscle tissues, which was enhanced by ANT. In addition, ANT activated insulin receptor phosphorylation, suggesting an increased utilization of glucose by tissues. Moreover, ANT protected pancreatic tissue from STZ-induced apoptosis through regulation of caspase-3, Bax, and Bcl-2 proteins. Furthermore, ANT significantly suppressed malondialdehyde levels and restored superoxide dismutase and catalase activities in diabetic rats. Interestingly, the observed effects of ANT were superior to those of glibenclamide. Taken together, ANT from black soybean seed coat have anti-diabetic effects that are due, in part, to the regulation of glucose transporter 4 and prevention of insulin resistance and pancreatic apoptosis, suggesting a possible use as a drug to regulate diabetes.</P>
Energy Resources and Energy Policy in the Russian Federation with the Emphasis on Siberia
E.B. Tsoy 동아대학교 동아시아연구원 2008 동아시아 : 비교와 전망 Vol.7 No.2
본 논문은 2020년까지 러시아 정부의 전력 및 에너지 전략 정책에 대해 논하고 있다. 연료 에너지 복합단지(FEC) 에너지 정책의 지역적 차별성은 중앙 연방지구, 서북 연방지구, 남부 연방지구, Privolzhsky 연방지구, Urals 연방지구, 극동 연방지구, 시베리아 연방지구등지에서 주요하게 논의되고 있다. 우랄과 시베리아 지역에는 각각 러시아 전체 원료 및 가스 매장량의 약 60%와 40%가 매장되어 있다. 본 논문은 러시아의 광업, 전기 전력 공학, 원자력 산업 및 핵연료 싸이클의 발달 과정과 재생 에너지 자원, 연료의 지역적 유형으로서의 토탄과 장작에 대해 설명하고 있다. The paper considers the Russian Government?s power and energy strategic policy up to the period year 2020. Fuel and Energy Complex (FEC).Regional distinctions of energy policy are discussed with an emphasis on Central federal district, North-Western federal district, Southern federal district. Privolzhsky federal district, Urals federal district, Far eastern federal district, Siberian federal district. The Urals and Siberian regions have about 60% and 40% of overall Russian crude and gas reserves respectively. Course of development-Coal Mining, Electric Power Engineering, Atomic power industry and Nuclear fuel cycle. Renewable energy sources, Local types of fuel ? peat and firewood.
Wonchan Ra(Wonchan Ra),Vitaliy Tsoy(Vitaliy Tsoy ) 한국이슬람학회 2022 한국이슬람학회논총 Vol.32 No.3
Multinational enterprises (MNEs) have recently increased their presence in Kazakhstan, but research on their choice of foreign direct investment (FDI), a major form of entry, has not been sufficiently conducted despite its significance for firm strategy and the local economy. This study addresses the determinants of the choice of FDI modes by foreign firms in Kazakhstan, focusing on two major FDI modes, i.e., setting up a joint venture (JV) or a wholly owned subsidiary (WOS). Six hypotheses on how country-level factors affect MNEs’ choice between the two modes were established. Using secondary data on 187 firms from 41 countries operating in Kazakhstan as of 2019, a binomial logistic regression was conducted to test the hypotheses. The results show that a longer cultural distance, a higher corruption level, and a weaker economic relationship between home and host