Exploration of some indole-based hydroxamic acids as histone deacetylase inhibitors and antitumor agents

Huong, T. T.,Cuong, L.,Huong, P. T.,Thao, T. P.,Huong, L. T.,Dung, P. T.,Oanh, D. T.,Huong, N. T.,Quan, H. V.,Vu, T. K. Springer Science + Business Media 2017 Chemické zvesti Vol.71 No.9

An Empirial Study on Vietnam’s Trade Faclilitation in the Digital Economy

Thanh Huong Vu(Thanh Huong Vu ),Thi Thuy Hanh Lam(Thi Thuy Hanh Lam ),Ha Phuong Nguyen(Ha Phuong Nguyen ) The International Academy of Global Business and T 2023 The International Academy of Global Business and T Vol.19 No.2

Purpose - Vietnam is among the fastest growing digital economies in the Southeast Asian region, and has made enormous efforts to adopt digital measures to facilitate trade. The paper aims to assess Vietnam’s performance of digital trade facilitation and estimate the impact of digital trade facilitation on Vietnam’s exports to the Association of Southeast Asian Nations (ASEAN). Design/Methodology/Approach - Vietnam’s implementation of digital trade facilitation is assessed through a constructed framework based on two groups of indicators, including Information Availability and Formalities Automation extracted from the OECD Trade Facilitation database. Further, a gravity model was adopted to estimate the impact of digital trade facilitation on Vietnam’s exports. Findings - The results show that Vietnam performs a slightly better than the average level of ASEAN countries. However, Vietnam’s implementation of digital trade facilitation tends to be ỉmproving at a slower rate than other ASEAN countries’ implementations, as well as the country’s overall implementation of other trade facilitation. The paper is among leading studies to quantify the impact of digital trade facilitation on Vietnam’s exports to ASEAN countries, and finds that if Vietnam and ASEAN countries increase trade facilitation through Information Availability measures by 1%, Vietnam’s exports will increase more than proportionately by 1.29% and 1.01%, respectively. Meanwhile, the digitalization of trade formalities so far has had no effect on Vietnam’s exports to this region. Research Implications - Vietnam should place priority on enhancing automation in trade-related administrative procedures, especially in customs procedures. Furthermore, it should pay more attention to promote the electronic publication of trade-related information, enhance the transparency of government policymaking, and increase the quality of enquiry points.

Predicting Financial Distress Distribution of Companies

Giang Huong VU(Giang Huong VU ),Chi Thi Kim NGUYEN(Chi Thi Kim NGUYEN ),Dang Van PHAM(Dang Van PHAM ),Diu Thi Phuong TRAN(Diu Thi Phuong TRAN ),Toan Duc VU(Toan Duc VU ) 한국유통과학회 2022 유통과학연구 Vol.20 No.10

Purpose: Predicting the financial distress distribution of an enterprise is important to warn enterprises about their future. Predicting the possibility of financial distress helps companies have action plans to avoid the possibility of bankruptcy. In this study, the author conducted a forecast of the financial distress distribution of enterprises. Research design, data and methodology: The forecasting method is based on Logit and Discriminant analysis models. The data was collected from companies listed on Vietnam Stock Exchange from 2012 to 2020. In which there are both companies suffer from financial distress and non-financial distress. Results: The forecast analysis results show that the Logistic model has better predictability than the Discriminant analysis model. At the same time, the results also indicate three main factors affecting the financial distress of enterprises at all three research stages: (1) Liquidity, (2) Interest payment, and (3) firm size. In addition, at each stage, the impact of factors on financial distress differs. Conclusions: From the results of this study, the author also made several recommendations to help companies better control company operations to avoid falling into financial distress. Adjustments to current assets, debt, and company expansion considerations are the most important factors for companies.

[P1-211112] 대기오염도가 다른 두 지역에 식재된 도시녹화 수목의 대기오염내성지수와 예상성능지수 평가

Bui Thi Huong(Bui Thi Huong ),Odsuren Uuriintuya(Odsuren Uuriintuya ),권계정(Kei Jung Kwon),김상용(Sang Yong Kim),박봉주(Bong Ju Park) 인간식물환경학회 2021 인간식물환경학회 학술대회 Vol.2021 No.추계

Using Online Respondent Driven Sampling for Vietnamese Youths’ Alcohol Use and Associated Risk Factors

Melvyn WB Zhang,Bach Xuan Tran,Huong Lan Thi Nguyen,Huong Thi Le,Nguyen Hoang Long,Huong Thi Le,Nguyen Duc Hinh,Tran Dinh Tho,Bao Nguyen Le,Vu Thi Minh Thuc,Chau Ngo,Nguyen Huu Tu,Carl A. Latkin,Roger 대한의료정보학회 2017 Healthcare Informatics Research Vol.23 No.2

Objectives: The average alcohol consumption per capita among Vietnamese adults has consistently increased. Although alcoholrelated disorders have been extensively studied, there is a paucity of research shedding light on this issue among Internet users. The study aimed to examine the severity of alcohol-related disorders and other associated factors that might predispose individuals towards alcohol usage in a sample of youths recruited online. Methods: An online cross-sectional study was conducted with 1,080 Vietnamese youths. A standardized questionnaire was used. Respondent-driven sampling was applied to recruit participants. Multivariate logistic and Tobit regressions were utilized to identify the associated factors. Results: About 59.5% of the males and 12.7% of the total youths declared that they were actively using alcohol. From the total sample, a cumulative total of 32.3% of the participants were drinking alcohol, with 21.8% and 25.0% of the participants being classified as drinking hazardously and binge drinkers, respectively. The majority of the participants (60.7%) were in the pre-contemplative stage. Conclusions: A high prevalence of hazardous drinking was recognized among online Vietnamese youths. In addition, we found relationships between alcohol use disorder and other addictive disorders, such as tobacco smoking and water-pipe usage. Our results highlighted that the majority of the individuals are not receptive to the idea of changing their alcohol habits, and this would imply that there ought to be more government effort towards the implementation of effective alcohol control policies.

Improvement of selective separation of CO₂ over N₂ by transition metal–exchanged nano-zeolite

Huong, Pham-Thi,Lee, Byeong-Kyu Elsevier 2017 Microporous and mesoporous materials Vol.241 No.-

<P><B>Abstract</B></P> <P>This study investigated selective CO<SUB>2</SUB> adsorption over N<SUB>2</SUB> by metals exchanged nano-zeolite synthesized. The BET specific surface areas of nano zeolite after exchange by Cu (Cu-NZ) and Fe (Fe-NZ) ions were 869.32 and 721.46 m<SUP>2</SUP>/g, respectively. The CO<SUB>2</SUB> adsorption capacities and CO<SUB>2</SUB> selectivity over N<SUB>2</SUB> of Cu-NZ and Fe-NZ were decreased with increasing temperature. Based on the Langmuir- Freundlich adsorption isotherms, the CO<SUB>2</SUB> adsorption capacities of Cu-NZ and Fe-NZ were 7.16 and 6.23 mmol/g, respectively, measured at 20 °C and 1 atm. The highest CO<SUB>2</SUB> selectivities by Cu-NZ and Fe-NZ were 50.71 and 46.38 at 20 °C, respectively. The improvement in CO<SUB>2</SUB> adsorption capacity and adsorption selectivity could be explained due to the electron transfer by both σ-donation (electron transfer from bonding π<SUB>2p</SUB> orbitals of CO<SUB>2</SUB> molecules to 4s orbital of Cu <SUP>2+</SUP> and Fe <SUP>3+</SUP> ions on the Cu-NZ and Fe-NZ, respectively). Also the d-π<SUB>2</SUB> <SUP>∗</SUP> back donation by electron transfer from unoccupied 4d of Cu<SUP>2+</SUP> and Fe <SUP>3+</SUP> ions to occupied π<SUB>2p</SUB> <SUP>∗</SUP> of CO<SUB>2</SUB> molecule would be high effective to CO<SUB>2</SUB> adsorption process. Adsorption kinetics showed that the pseudo-second order model was more suitable than the pseudo-first one for predicting the CO<SUB>2</SUB> adsorption process by Cu-NZ and Fe-NZ. In the regeneration study of CO<SUB>2</SUB>-loaded adsorbents, even after 10 cycles of adsorption-desorption, the adsorption capacity of CO<SUB>2</SUB> were decreased only 3.46 and 4.12% by using Cu-NZ and Fe-NZ, respectively. These adsorption and desorption characteristics suggest that Cu-NZ and Fe-NZ can be utilized as good adsorbents for the selective removal of CO<SUB>2</SUB>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cu-NZ and Fe-NZ demonstrated great potential for CO<SUB>2</SUB> capture and CO<SUB>2</SUB>/N<SUB>2</SUB> separation. </LI> <LI> The CO<SUB>2</SUB> adsorption capacities of Cu-NZ and Fe-NZ were 7.16 and 6.23 mmol/g, respectively. </LI> <LI> The selectivities of CO<SUB>2</SUB> over N<SUB>2</SUB> by Cu-NZ and Fe-NZ were 50.71 and 46.36, respectively. </LI> <LI> The CO<SUB>2</SUB> adsorption capacity decreased with increasing humility and temperature. </LI> <LI> CO<SUB>2</SUB>-loaded Cu-NZ and Fe-NZ exhibited great regeneration with high desorption efficiency. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Using Importance -Performance Analysis in Parks Management:An Application to Asian Park -Da Nang, Viet Nam

( Huong T. C Cao ) 한국문화관광학회 2022 문화관광연구 Vol.24 No.2

Service quality is an important factor effecting park management, and customers’ satisfaction. High service quality will providing high satisfaction. When customers satisfy, they will revisit the park and willing introduce to another customer. So, evaluating service quality is very important to park managers. The results of evaluation will help park managers increasing service quality and visitor return rate. The research using Importance - Performance Analysis (IPA) to measure the quality of Asian Park. The results of research suggesting some solutions for managers to improve service quality, increasing customer satisfaction and attracting more visitors.

EXISTENCE THEOREMS FOR CRITICAL DEGENERATE EQUATIONS INVOLVING THE GRUSHIN OPERATORS

Huong Thi Thu Nguyen,Tri Minh Nguyen Korean Mathematical Society 2023 대한수학회논문집 Vol.38 No.1

In this paper we prove the existence of nontrivial weak solutions to the boundary value problem -G₁u = u³ + f(x, y, u) in Ω, u ≥ 0 in Ω, u = 0 on ∂Ω, where Ω is a bounded domain with smooth boundary in ℝ³, G₁ is a Grushin type operator, and f(x, y, u) is a lower order perturbation of u³ with f(x, y, 0) = 0. The nonlinearity involved is of critical exponent, which differs from the existing results in [11, 12].

Biodiesel Refining and Glycerin Recovering Process of Transesterification from Tra Catfish Fat

Huong, Le Thi Thanh,Tan, Phan Minh,Hoa, Tran Thi Viet,Lee, Soo The Korean Society of Applied Science and Technolo 2009 한국응용과학기술학회지 Vol.26 No.1

Nowadays, Tra catfish fat is given attention as an appropriate material for biodiesel production in Vietnam. The aim of this work is to investigate the optimal conditions of refining biodiesel and recovering glycerin by the transesterification from Tra catfish fat using KOH catalyst. As our results, the yield of transesterification was achieved to 94.17% at $50^{\circ}C$ for 45 min with 6:1 molar ratio of methanol to fat in the presence of 0.8% KOH catalyst, and wherein the biodiesel was refined by washing with distilled water at $70^{\circ}C$ and dried in a microwave oven. The yield of raw glycerin recoveries from the transesterification process was 78.58%. The purity of raw glycerin was 84.14% by the conditions of neutralization state with $H_{3}PO_{4}$ solution (pH = 5), $70^{\circ}C$, and 60 min. Activated carbon (3.0 wt.%) was used for the bleaching process at $80^{\circ}C$ for 20 min. The biodiesel was obtained in accordance with for ASTM D 6751 (biodiesel standard). The ash and water of raw glycerins were 7.32 and 8.01%, respectively, and implied that the raw glycerin is very promising candidate to be used as a raw material for textile and cosmetic industries.

Anode biofilm maturation time, stable cell performance time, and time-course electrochemistry in a single-chamber microbial fuel cell with a brush-anode

Huong V. H. Tran,Eojin Kim,Sokhee P. Jung 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-

For accurate and reproducible MFC experiments, it is important to know when MFCs produce stable cellperformance. Herein, four replicate single-chamber MFCs were tested for 17 weeks by using polarizationand cyclic voltammetry (CV) tests. The strong MFCs (#2,4,3) showing continuous performance enhancementinitially (3rd–9th week) produced good subsequent performance (9th–17th week). The weak MFC-1experienced a performance drop initially and showed bad subsequent performance. All the MFC performancebecame stable after 9 weeks. The strong MFCs produced power 2.8–3.6 times higher and anoderesistance 7.5–23.9 times lower than the weak. However, their cathode resistances were similar. CVresults showed anodic current production increased continuously in all MFCs, indicating anode biofilmskept growing;, MFC performance did not increase accordingly. Anodic CVs had a typical S-shape curve,but those of MFC-1 showed straight lines from the 9th week. The weak MFC-1 showed smaller CV currentsand thinner CV curves than those of the strong MFCs. In MFC-1, at the 17th week, the anode resistancereduced by 47%, anodic current and cell performance increased. Regression analysis showed anode resistancewas a limiting factor of the weak MFC and cathode resistance was that of the strong MFCs. Thisresult suggests one operating principle: improve anodes in weak MFCs and cathodes in strong MFCs toachieve better MFC performance.