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Pham, Ha Thanh Tung,Ha, Thi Kim Quy,Cho, Hyo Moon,Lee, Ba Wool,An, Jin Pyo,Tran, Van On,Oh, Won Keun American Chemical Society and American Society of 2018 Journal of natural products Vol.81 No.11
<P>As part of ongoing research to find new antidiabetic agents from medicinal plants, the chemical composition of <I>Gynostemma longipes</I>, an ethnomedicinal plant used to treat type 2 diabetes mellitus by local communities in Vietnam, was investigated. Ten new dammarane triterpenes, including two 3,4-<I>seco</I>-dammarane analogues, secolongipegenins S1 and S2 (<B>1</B> and <B>2</B>), a 3,4-<I>seco-</I>hexanordammarane, secolongipegenin S3 (<B>3</B>), two hexanordammarane glycosides, longipenosides ND1 and ND2 (<B>4</B> and <B>5</B>), and five other dammarane glycosides, longipenosides GL1-GL5 (<B>6</B>-<B>10</B>), were isolated from a 70% EtOH extract of the whole <I>G. longipes</I> plant. The structures of the new compounds were elucidated using diverse spectroscopic methods. All of the isolates were evaluated for their stimulatory activities on glucose uptake in differentiated 3T3-L1 adipocyte cells using 2-[<I>N</I>-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]-2-deoxy-<SMALL>D</SMALL>-glucose as a fluorescent-tagged glucose probe. The stimulant activities on glucose uptake by the test compounds were mediated via the activation of the AMPK pathway using differentiated mouse C2C12 skeletal myoblasts. Consequently, compounds <B>1</B>, <B>2</B>, and <B>4</B> enhanced glucose uptake and GLUT4 translocation significantly by regulating the AMPK signaling pathway.</P> [FIG OMISSION]</BR>
Spatial Interpolation of Meteorologic Variables in Vietnam using the Kriging Method
( Xuan Thanh Nguyen ),( Ba Tung Nguyen ),( Khac Phong Do ),( Quang Hung Bui ),( Thi Nhat Thanh Nguyen ),( Van Quynh Vuong ),( Thanh Ha Le ) 한국정보처리학회 2015 Journal of information processing systems Vol.11 No.1
This paper presents the applications of Kriging spatial interpolation methods for meteorologic variables, including temperature and relative humidity, in regions of Vietnam. Three types of interpolation methods are used, which are as follows: Ordinary Kriging, Universal Kriging, and Universal Kriging plus Digital Elevation model correction. The input meteorologic data was collected from 98 ground weather stations throughout Vietnam and the outputs were interpolated temperature and relative humidity gridded fields, along with their error maps. The experimental results showed that Universal Kriging plus the digital elevation model correction method outperformed the two other methods when applied to temperature. The interpolation effectiveness of Ordinary Kriging and Universal Kriging were almost the same when applied to both temperature and relative humidity.
Reduced Reference Quality Metric for Synthesized Virtual Views in 3DTV
Thanh Ha Le,Vuong Tung Long,Dinh Trieu Duong,정승원 한국전자통신연구원 2016 ETRI Journal Vol.38 No.6
Multi-view video plus depth (MVD) has been widely used owing to its effectiveness in three-dimensional data representation. Using MVD, color videos with only a limited number of real viewpoints are compressed and transmitted along with captured or estimated depth videos. Because the synthesized views are generated from decoded real views, their original reference views do not exist at either the transmitter or receiver. Therefore, it is challenging to define an efficient metric to evaluate the quality of synthesized images. We propose a novel metric—the reduced-reference quality metric. First, the effects of depth distortion on the quality of synthesized images are analyzed. We then employ the high correlation between the local depth distortions and local color characteristics of the decoded depth and color images, respectively, to achieve an efficient depth quality metric for each real view. Finally, the objective quality metric of the synthesized views is obtained by combining all the depth quality metrics obtained from the decoded real views. The experimental results show that the proposed quality metric correlates very well with full reference image and video quality metrics.
Pham, Tung Thanh,Nguyen, Hanh Thuy,Phung, Cao Dai,Pathak, Shiva,Regmi, Shobha,Ha, Dong-Ho,Kim, Jong Oh,Yong, Chul Soon,Kim, Sang Kyoon,Choi, Ji-Eun,Yook, Simmyung,Park, Jun-Beom,Jeong, Jee-Heon Elsevier 2019 Journal of industrial and engineering chemistry Vol.76 No.-
<P><B>Abstract</B></P> <P>Selective delivery of anti-cancer drugs to bone tumors remains an on-going developmental issue due to problems of drug availability and the physiological nature of bone. This study was undertaken to enhance accumulation of doxorubicin (DOX) in bone metastasis microenvironments using alendronate-functionalized graphene oxide nanosheets (NGO-ALs). In vivo biodistribution study showed NGO-ALs were retained for longer and at higher concentrations in bone tumor areas than non-functionalized NGOs. Our findings suggest that NGO-ALs could be used as a promising carrier to enhance antitumor effects and diminish the off-target effects of DOX for the treatment of bone metastasis.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Factors Affecting the Internal Control System: A Case Study of Chemical Enterprises in Vietnam
Hoang Thanh NGO,Tung Dao NGUYEN,Nga Thuy Thi NGUYEN,Ha Ngoc DAO,Anh Phuong Tran VU 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.12
The article analyzes the impact of factors affecting the internal control system of chemical enterprises in Vietnam, providing more empirical evidence on factors affecting the system of internal control. Research data is collected in the form of face-to-face interviews and email interviews with managers and employees working in different positions, managers at all levels, chief accountants, and accountants of 52 chemical enterprises in Vietnam. The survey results collected 310 questionnaires. After eliminating the invalid questionnaires due to many blank cells, the authors chose to use 297 questionnaires. Quantitative research was carried out with SPSS 25 software. Research results show that Business Strategy, Organizational Structure, Organization’s perception of the instability of the external environment, and Organizational culture are the factors that positively affect the internal control system of chemical enterprises. This can be explained that, for chemical enterprises, Business strategy, Organizational structure, Organization’s perception of the instability of the external environment, and Good organizational culture will positively impact the internal control system of chemical enterprises. Based on the research results, the authors have proposed recommendations to enhance the effectiveness of the internal control system of chemical enterprises in Vietnam, thereby contributing to improving the performance of enterprises in the chemical Vietnamese.
The Impact of Capital on Growth of Small and Medium Enterprises: Evidence from Vietnam
Van Dung HA,Van Tung NGUYEN,Truong Thanh Nhan DANG 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.1
Small and medium businesses (SMEs) play a critical role in the economy, yet they are plagued by a shortage of finance. Determining the influence of cash sources both inside and outside the firm is critical to the company’s survival and growth. As a result, the purpose of this research is to determine the impact of capital on the growth of SMEs in Vietnam. The key factors of this research are equity and liabilities, which are two proxies for a firm’s capital. The data is based on the results of a survey conducted every two years from 2005 to 2015, which included over 2,600 SMEs in 20 processing and manufacturing industries in ten provinces and cities, including Hanoi, Hai Phong, Ho Chi Minh City, Ha Tay, Phu Tho, Nghe An, Quang Nam, Khanh Hoa, Lam Dong, and Long An. The findings show that characteristics such as equity capital, total workforce growth rate, and male entrepreneurs have a positive impact on enterprise growth, whereas liabilities, firm age, and export have a negative impact on enterprise growth. The study has demonstrated that equity has a positive impact while liabilities have a negative impact on the growth of Vietnamese SMEs.
Nguyen Huu Tung,Chau Van Minh,Phan Van Kiem,Hoang Thanh Huong,Tran Thu Ha,Nguyen Tien Dat,Nguyen Xuan Nhiem,Nguyen Xuan Cuong,Jae-Hee Hyun,Hee-Kyoung Kang,김영호 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.12
One new C29 sterol with a cyclopropane ring at C-25 and C-26, aragusteroketal B (1), and aragusterol B (2) were isolated from the Vietnamese marine sponge Ianthella sp. Their structures were elucidated by extensive spectroscopic analyses. Both 1 and 2 showed moderate cytotoxic activity against MCF-7, SK-Hep-1, and HeLa cell lines with IC50 in the range of 12.8-27.8 μM.
Minh Hieu Nguyen,Thanh Tung Ha,Sy Sua Tu,Thanh Chuong Nguyen 서울시립대학교 도시과학연구원 2019 도시과학국제저널 Vol.23 No.4
Creation of an effective bus rapid transit (BRT) system has never been an easy task, especially for the first case in a developing country, since a BRT project requires a considerable investment with participation from most walks of life. Hanoi, the capital of Vietnam, has omitted to overcome impediments in the maiden BRT establishment. The Hanoi BRT performs poorly with ridership at only 13,500 passengers per day. In this paper, it is scrutinized based on a series of barriers that are findings in previous works and in the shape of a theoretical framework with seven main categories, namely: (1) institutional and legislative context, (2) political leadership and commitment, (3) physical design and operation, (4) management of competing modes, (5) adequate funding, (6) public participation and (7) image promotion. Results emphasize that the difference in views of the funder and the local authorities on the BRT development is the chief barrier. Enforcement of the BRT lanes from motorcycles is demanding, which is distinct from cities previously creating BRT. The findings from the Hanoi BRT are not unique. Lessons drawn from its failure could be widely informative for the BRT establishment in a number of cities with similar contexts.