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Distribution of Factors Affecting Foreign Direct Investment in ASEAN Countries
Anh Thi Lan NGUYEN(Anh Thi Lan NGUYEN ),Chau Thi Minh PHAM(Chau Thi Minh PHAM ),Hanh Hong NGUYEN(Hanh Hong NGUYEN ),Dat Ngoc NGUYEN(Dat Ngoc NGUYEN ),Duy Van NGUYEN(Duy Van NGUYEN ) 한국유통과학회 2023 유통과학연구 Vol.21 No.2
Purpose: Research on attracting foreign direct investment plays an important role in ASEAN countries. ASEAN has needed FDI capital for development and integration with many developing countries. Research design, data and methodology: This study is conducted to assess the impact of factors: inflation (INF), economic growth (GDP), population (POP), and trade (TRADE) on attracting foreign direct investment (FDI) of ASEAN countries. The study will find out how factors distribution contributes to FDI attraction. The study collects data from 10 ASEAN countries from 2010 to 2020. With data collected for ten countries from 2010 to 2020, data analysis with panel data will be used in this study. The Regression with Driscoll-Kraay standard errors correction model will be used in the study. Results: Panel data analysis shows that economic growth and population positively impact FDI attraction in ASEAN countries. However, two factors: INF and TRADE, do not affect FDI. Conclusions: Countries need to focus on economic development, create many good conditions for people and domestic enterprises and create opportunities for foreign investors to pay more attention. improving the quality of domestic human resources will help to better improve the working quality factor when the demand for high-quality human resources increases.
Inhibition Effect of Flavonoid Compounds against Neuraminidase Expressed in Pichia pastoris
Nguyen, Thi Thanh Hanh,Kang, Hee-Kyoung,Kim, Young-Min,Jang, Tae-Su,Kim, Doman 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.1
Neuraminidase (NA) is one of the two glycoproteins on the surface of influenza virus, which cleaves terminal sialic acid residues and facilitates the release of virions from infected cells. The recombinant NA from H5N1 influenza virus strain A/Vietnam/1203/04 was expressed in Pichia pastoris X33 as a 45 kDa protein that displayed a $K_m$ of $9.96{\pm}1.26{\mu}M$ with fluorogenic substrate, 2'-(4-methylumbelliferyl)-${\alpha}$-D-N-acetyl neuraminic acid. Partially purified NA was used for the inhibition and kinetic assays with eight flavonoid compounds and gallic acid. Among them, gallocatechin gallate (GCG) showed the best inhibition against NA with the $IC_{50}$ of $8.98{\pm}0.46{\mu}M$ and showed a competitive inhibition pattern with Ki value of $8.34{\pm}0.25{\mu}M$. In molecular docking experiments, GCG displayed a binding energy of -13.71 kcal/mol to the active site of NA and the galloyl moiety was required for NA inhibition activity.
Nguyen, Thi Thanh Hanh,Jung, Sun-Hwa,Lee, Sun,Ryu, Hwa-Ja,Kang, Hee-Kyoung,Moon, Young-Hwan,Kim, Young-Min,Kimura, Atsuo,Kim, Doman 한국생물공학회 2012 Biotechnology and Bioprocess Engineering Vol.17 No.5
Human intestinal maltase (HMA) is an ${\alpha}$-glucosidase responsible for the hydrolysis of ${\alpha}$-1,4-linkages from the non-reducing end of malto-oligosaccharides. HMA has become an important target in the treatment of type-2 diabetes. In this study, epigallocatechin gallate (EGCG) and EGCG glucoside (EGCG-G1) were identified as inhibitors of HMA by an in vitro assay with $IC_{50}$ of $20{\pm}1.0$ and $31.5{\pm}1.0{\mu}M$, respectively. A Lineweaver-Burk plot confirmed that EGCG and EGCG-G1 were competitive inhibitors of maltose substrate against HMA and inhibition kinetic constants ($K_i$) calculated from a Dixon plot were $5.93{\pm}0.26$ and $7.88{\pm}0.57{\mu}M$, respectively. Both EGCG and EGCG-G1 bound to the active site of HMA with numerous hydrophobic and hydrogen bond interactions.
Characterization and Biochemical properties of water soluble quercetin in steviol glucosides
Thi Thanh Hanh NGUYEN,ChangSeop SEO,Namhyeon PARK,Jungmin HA,DongGu LEE,Songhee HAN,Tae-kyung LEE,Jaewon HUR,Chaeri SONG,Shina JIN,So-hyung KWAK,Jeesoo KIM,Jinbeom SI,Doman KIM 한국생물공학회 2016 한국생물공학회 학술대회 Vol.2016 No.10