Highly Expressed Cholera Toxin B Subunit in the Fruit of a Transgenic Tomato (Lycopersicon esculentum L.)

Nguyen Hoang Loc,Le Thi Thinh,양문식,김태금 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.3

The cholera toxin B subunit (CTB), a nontoxic molecule with potent biological properties, is a powerful mucosal and parenteral adjuvant that induces a strong immune response against co-administered or coupled antigens. A gene encoding CTB, which was modified based on the optimized codon usage in the plant, was synthesized and fused to the endoplasmic reticulum retention signal KDEL to enhance its expression level in plants. The synthetic CTB (sCTB) gene was introduced into a plant expression vector adjacent to the CaMV 35S promoter, and was transformed into tomato using an Agrobacteriummediated transformation method. The integration of the sCTB gene into the genomic DNA of transgenic plants was confirmed by genomic DNA PCR amplification. The synthesis and assembly of CTB protein in transgenic plants was demonstrated through immunoblot analysis and GM1-ELISA. The highest amount of CTB protein produced in transgenic tomatoes was approximately 0.9% of total soluble fruit protein which was 10-fold greater than the previously 0.081%. G_(M1)-ELISA indicated that plant-synthesized CTB protein bound specifically to G_(M1)-gangliosides, suggesting that the CTB subunits formed active pentamers.

Business Partner Roles of Management Accountants Through the Emergence of Sustainability Disclosures

HOANG, Thinh Gia,NGUYEN, Trung Quang,GEORGE, Majo Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.12

This study explores whether the implementation of sustainability disclosure can trigger or stimulate the change in the roles of management accountants in adopting organizations in Vietnam as business partners. To do so, it explores the roles of management accountants in integrated reporting (IR) adopting organizations and sustainability reporting (SR) adopting organizations based on the use of the pragmatic constructivism (PC) theoretical framework. In addition, qualitative semi-structured interviews were used to provide an in-depth investigation of management accountants' work in both IR and SR adopting organizations. The empirical findings suggest that the adoption of the IR framework has triggered changes in management accountant roles toward the new business partner roles to support the decision-making process within their organizations. On the other hand, management accountants from SR adopting organizations still work as traditional "bean-counter" roles. Our paper concludes by indicating several propositions based on our empirical findings that can be tested by future researchers from the domain by collecting relevant data. Our study can be seen as a response to the recent call for a more in-depth examination of the practice of sustainability disclosure from the practitioners' perspectives in adopting organizations.

A novel control method to maximize the energy-harvesting capability of an adjustable slope angle wave energy converter

Tri, Nguyen Minh,Truong, Dinh Quang,Thinh, Do Hoang,Binh, Phan Cong,Dung, Dang Tri,Lee, Seyoung,Park, Hyung Gyu,Ahn, Kyoung Kwan Elsevier 2016 RENEWABLE ENERGY Vol.97 No.-

<P><B>Abstract</B></P> <P>This paper introduces a novel control approach to maximizing the output energy of an adjustable slope angle wave energy converter (ASAWEC) with oil-hydraulic power take-off. Different from typical floating-buoy WECs, the ASAWEC is capable of capturing wave energy from both heave and surge modes of wave motions. For different waves, online determination of the titling angle plays a significant role in optimizing the overall efficiency of the ASAWEC. To enhance this task, the proposed method was developed based on a learning vector quantitative neural network (LVQNN) algorithm. First, the LVQNN-based supervisor controller detects wave conditions and directly produces the optimal titling angles. Second, a so-called efficiency optimization mechanism (EOM) with a secondary controller was designed to regulate automatically the ASAWEC slope angle to the desired value sent from the supervisor controller. A prototype of the ASAWEC was fabricated and a series of simulations and experiments was performed to train the supervisor controller and validate the effectiveness of the proposed control approach with regular waves. The results indicated that the system could reach the optimal angle within 2s and subsequently, the output energy could be maximized. Compared to the performance of a system with a vertically fixed slope angle, an increase of 5% in the overall efficiency was achieved. In addition, simulations of the controlled system were performed with irregular waves to confirm the applicability of the proposed approach in practice.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This paper proposes a novel energy maximization algorithm of a sliding-buoy wave energy converter (SBWEC). </LI> <LI> An efficiency optimization mechanism is designed and integrated into the SBWEC. </LI> <LI> The control logic is based on a learning vector quantitative neural network for classifying the wave information. </LI> <LI> The effectiveness of the proposed approach is verified through both simulations and experiments. </LI> </UL> </P>

Effects of non-vertical linear motions of a hemispherical-float wave energy converter

Do, Hoang-Thinh,Dinh, Quang-Truong,Nguyen, Minh-Tri,Phan, Cong-Binh,Dang, Tri-Dung,Lee, Seyoung,Park, Hyung-Gyu,Ahn, Kyoung-Kwan Elsevier 2015 Ocean engineering Vol.109 No.-

<P><B>Abstract</B></P> <P>The hydraulic power-take-off mechanism (HPTO) is one of the most popular methods in wave energy converter (WECs). However, the conventional HPTO with only one direction motion has some drawbacks which limit its power capture capability. This paper proposes an <I>adjustable slope angle wave energy converter</I> (ASAWEC) and investigates the effect of slope angle on the performance of the proposed wave energy converter to find the optimal slope angle with the purpose to increase the power capture capability as well as energy efficiency. A mathematical model of components from a floating buoy to a hydraulic motor was modeled. A small scale WEC test rig was fabricated to verify the power capture capability and efficiency of the proposed system throughout experiments.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This paper proposed an adjustable moving angle wave energy converter (AMAWEC). </LI> <LI> Mathematical model of AMAWEC was presented and simulated. </LI> <LI> An AMAWEC test rig were fabricated to do the experiment in variety of wave conditions and moving angle in the water tank. </LI> <LI> The effect of moving angle on the performance of a wave energy converter was investigated to find the optimal moving angle in each wave condition. </LI> <LI> Finally, the effectiveness of AMAWEC has been verified by experimental results. </LI> </UL> </P>

Relationship between Ownership Structures and Earnings Management Behavior in Vietnamese Commercial Banks

TRAN, Thinh Quoc,LY, Anh Hoang,NGUYEN, Dung Khanh Ngoc Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.9

Earnings management behavior is the use of accounting procedures, through accounting policies, to intentionally purposeful control in the provision of information to users. The purpose of this paper is to examine the relationship between ownership structure factors and earnings management behavior of 30 Vietnamese commercial banks. The paper uses the ordinary least square method to examine this relationship and employs time series data of 15 years from 2005 to 2019. The study also uses agency theory an asymmetric information theory. The authors examined six independent variables related to the ownership structure and these variables are typical of Vietnamese commercial banks. The results of the study show that the foreign ownership ratio is an opposite effect, while the ownership concentration variable has a positive effect on earnings management behavior of Vietnamese commercial banks. Based on that, the article proposes a number of policy suggestions for the State bank of Vietnam and Board of directors of commercial banks as well as investors to identify and to limit the earnings management behaviors of Vietnamese commercial banks. This contributes to ensuring information transparency as well as improving the quality of accounting information of Vietnamese commercial banks in the coming years.

SYSTEMATIC REVIEW OF OMNICHANNEL RETAILING AND FUTURE RESEARCH AVENUES

Anh Thi Van Nguyen,Thinh Hoang,Robert McClelland,Nga Viet Le,Len Thi Dinh 글로벌지식마케팅경영학회 2020 Global Marketing Conference Vol.2020 No.11

Critical Factors Affecting Selection of Travel Destinations: A Case Study in Vietnam

Thanh Phong TRAN,Trong Nghia PHAN,Hoang Thinh NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.9

This study is conducted to fill the research gap in proposing and testing the relationship between “Attitudes about the overall image of the destination”, “Subjective norms” and “Perceived behavioral control”. Simultaneously, we examine the relationship between these variables and tourists’ “intent to choose a destination.”. While most previous studies only deal with the relationship between destination image and intended behavior of tourists, this study uses the theory of planned behavior (Ajzen, 1991) to explain the intended behavior of tourists. In addition, the Theory of Destination Image (Echtner & Ritchie, 1991) is used to explain the factor “attitudes about the overall image of the destination”, contribute to supplementing and perfecting the Theory of Planned Behavior. This study uses a Structural Equation Modeling (SEM) to analyze a sample of 993 observations, the subjects of which are international tourists to Vietnam, to test the relationship between second-order constructs. The test results show that “Subjective norms” and “Perceived behavioral control” have an impact on “Attitudes about the overall image of the destination”. Moreover, all these three factors have an impact on “Intent to choose destination”, in which the factor “Perceived behavioral control” has the greatest impact on “intention to choose destination”.

ITO 마이크로 방전가공에서의 공구마모에 관한 연구

김현철(H. C. Kim),Trinh Xuan Long,Tran Nguyen Hung,Vuong Duc Thinh,Hoang Ha My 한국정밀공학회 2018 한국정밀공학회 학술발표대회 논문집 Vol.2018 No.5월