The Effect of Country-of-Origin on Customer Purchase Intention: A Study of Functional Products in Vietnam

Nguyen,Ngoc Duy Phuong,Nguyen,Tien Dat 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

This paper examines key determinants and the effect of country-of-origin on customer’s purchase intention of functional food and dietary supplement product in Vietnam. Data was collected from a survey of 242 Vietnamese who have experienced in buying functional and supplement food. This paper employed partial least square (PLS) as a technique used to analyze the measurement and structural models. The findings provide evidence that social prestige customer perceives and their positive attitude toward functional food which are main factors influencing on consumers’ purchase intention. Customer’s perceived prestige plays an important role in decision-making process to purchase. The higher social prestige taken up in consumers’ mind, the higher consumers’ purchase intention is. Moreover, the more positive attitude customer holds toward functional food, the higher consumers’ purchase intention. The research results provide useful information in current understanding of what antecedents determine factors influencing customer’s intention to purchase functional food and lead to managerial implications for business strategies.

A Partial Least Squares Path Model of Repurchase Intention in Smartphone-based Ride Hailing Service

Nguyen,Ngoc Duy Phuong,Tran,Thi Dai Trang 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

The aims of this study are applying the Perceived value model and employing the three factors defining service quality of information system from DeLone and McLean’s success model to identify the key factors affecting repurchase intention in smartphone-based ride hailing service. The research framework was examined with 427 valid respondents from Grab and Uber customers in Vietnam. Partial Least Square (PLS) employed to analyze the measurement and structural model. The statistical results support all seven proposed hypotheses. The study confirm that service quality and electronic service quality of information system are significant predictors of overall perceived service quality. In addition, when customer perceives the service quality outweighs their sacrifices, the perceived value increase, subsequently results in higher repurchase intention towards smartphone-based ride-hailing service. Overall, other variables account for 51.1% of variance of repurchase intention. The study confirms the relationships of the three variables represent the electronic service quality and service quality with the overall service quality, which directly effects to perceived value, considering a more comprehensive model for service in m-commerce context.

Developing Education Quality for Human Resource in the Tourism Industry - A Study in Ho Chi Min City, Vietnam

Nguyen,Thang Quyet,Ngo,Thanh Phuong Quynh 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

Human resource is a key element for developing Tourism in Vietnam. As the most important destination of Vietnam Tourism, Ho Chi Minh city (also known as HCMC) welcomes 60 % total international tourists in Vietnam every year, but the qualification of training for HCMC tourism human resource is rated as low- quality as well as quantity, under the requirements of development and global integration. By synthesizing, document study combined with the survey method; this study has in-depth exploratory, analysis on the reality to conducted reasons of difficulties in human resource training in the Tourism industry, facing by universities, college, vocational centers majored in Tourism (also known as tourism institutions) in Ho Chi Minh City. The result has indicated the enterprises’ evaluation and difficulties in improving the qualification of tourism institutions. Therefore, the report proposed some solutions to improve training human resource efficiency in this field.

Key Determinants and the Effects of Perceived Value on Online Repurchase Intention of E-Commerce in Vietnam

Nguyen,Ngoc Duy Phuong,Nguyen,Duy Long 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

The purpose of this paper is to explore how customers’ repurchase intention of e-commerce in Viet Nam which is considered as a potential country in developing this field. This paper focuses to the effects of perceived value on online repurchase intention of e-commerce in Vietnam and what key determinants affect to the perceived value. To test the proposed hypotheses, the quantitative method is applied to collect the data. The partial least square (PLS) was used as a technique to analyze the data included the measurement as well as structural model. Data from this research collected from 261 Vietnamese online shoppers who have already purchased in E-commerce in Vietnam.

The Relationship Between Business Resources, Outside Cooperation, Dynamic Capability, and Performance of Startup Enterprises

Dong Van VU1,Tai Van PHAM2,Ghi Nha TRAN3,Anh Phuong Thi NGUYEN4,Cong Van NGUYEN5 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.6

This study seeks to examine the relationship between business resources (through VRIN: Valuable - valuable, Rare - scarce; Inimitable - difficult to adapt, Irreplaceable - hard to replace), dynamic capability, external cooperation, and efficiency of startups operating in the seafood export sector. Research data was collected randomly and conveniently from 250 enterprises in Ba Ria-Vung Tau province, Vietnam, from October 2020 to December 2020. After excluding those ineligible, the remaining 204 enterprises meet the research conditions. With the support of SPSS-AMOS 22 dedicated software, using the 5-step Likert scale and Structural Equation Modeling (SEM), the study conducted analysis steps such as verifying convergence, discriminant value, unidirectional and scale reliability when giving the components correlated freely in the critical model by Confirmatory Factor Analysis (CFA) analysis. Results of the study have shown that the enterprise resource factor - VRIN has a positive impact on dynamic capability, and outside cooperation. However, in contrast to previous studies, we found that the relationship between enterprise resources - VRIN and performance as well as the relationship between dynamics capacity and performance is not clear. This shows that seafood exporters need to promote, exploit and effectively use this precious resource to improve business efficiency.

Correlation and Path Analysis of Association among Yield, Micronutrients, and Protein Content in Rice Accessions Grown Under Aerobic Condition from Karnataka, India

Nguyen Phuong Thuy(Nguyen Phuong Thuy ),Nguyen Ngoc Trai(Nguyen Ngoc Trai ),Bui Dang Khoa(Bui Dang Khoa ),Nguyen Hoang Xuan Thao(Nguyen Hoang Xuan Thao ),Vuong Tuan Phong(Vuong Tuan Phong ),Quach Van 한국육종학회 2023 Plant Breeding and Biotechnology Vol.11 No.2

Genetic variability and correlation analysis are fundamental references for the innovative development of breeding programs to improve varieties and desirable traits. In the present study, the correlation and path analysis was conducted to understand the association among yield, micronutrients (iron and zinc), and protein content under aerobic conditions in local rice landraces from various agro ecological regions of Karnataka, India. The grain yield per plant showed a significant positive correlation with plant height, the tiller number, spikelet fertility, flag leaf length, and test weight. The zinc content was negatively correlated with grain yield per plant. The phenotypic path-coefficient analysis revealed that the total number of tillers, grain length, test weight, and harvest index exhibited a positive direct effect on grain yield per plant, while Grain protein content showed a low direct effect on this trait. This study also indicated that harvest index, flag leaf length, spikelet fertility, and test weight could be considered to make for a higher yield.

Some characters of bacterial cellulases in goats' rumen elucidated by metagenomic DNA analysis and the role of fibronectin 3 module for endoglucanase function

Nguyen, Khanh Hoang Viet,Dao, Trong Khoa,Nguyen, Hong Duong,Nguyen, Khanh Hai,Nguyen, Thi Quy,Nguyen, Thuy Tien,Nguyen, Thi Mai Phuong,Truong, Nam Hai,Do, Thi Huyen Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.5

Objective: Fibronectin 3 (FN3) and immunoglobulin like modules (Ig) are usually collocated beside modular cellulase catalytic domains. However, very few researches have investigated the role of these modules. In a previous study, we have sequenced and analyzed bacterial metagenomic DNA in Vietnamese goats' rumen and found that cellulase-producing bacteria and cellulase families were dominant. In this study, the properties of modular cellulases and the role of a FN3 in unique endoglucanase belonging to glycosyl hydorlase (GH) family 5 were determined. Methods: Based on Pfam analysis, the cellulases sequences containing FN3, Ig modules were extracted from 297 complete open reading frames (ORFs). The alkaline, thermostability, tertiary structure of deduced enzymes were predicted by AcalPred, TBI software, Phyre2 and Swiss models. Then, whole and truncated forms of a selected gene were expressed in Escherichia coli and purified by His-tag affinity column for assessment of FN3 ability to enhance enzyme activity, solubility and conformation. Results: From 297 complete ORFs coding for cellulases, 148 sequences containing FN3, Ig were identified. Mostly FN3 appeared in 90.9% beta-glucosidases belonging to glycosyl hydrolase family 3 (GH3) and situated downstream of catalytic domains. The Ig was found upstream of 100% endoglucanase GH9. Rarely FN3 was seen to be situated downstream of X domain and upstream of catalytic domain endoglucanase GH5. Whole enzyme (called XFN3GH5 based on modular structure) and truncate forms FN3, XFN3, FN3GH5, GH5 were cloned in pET22b (+) and pET22SUMO to be expressed in single and fusion forms with a small ubiquitin-related modifier partner (S). The FN3, SFN3 increased GH5 solubility in FN3GH5, SFN3GH5. The SFN3 partly served for GH5 conformation in SFN3GH5, increased modules interaction and enzyme-soluble substrate affinity to enhance SXFN3GH5, SFN3GH5 activities in mixtures. Both SFN3 and SXFN3 did not anchor enzyme on filter paper but exfoliate and separate cellulose chains on filter paper for enzyme hydrolysis. Conclusion: Based on these findings, the presence of FN3 module in certain cellulases was confirmed and it assisted for enzyme conformation and activity in both soluble and insoluble substrate.

In vitro evaluation of the antioxidant and cytotoxic activities of constituents of the mangrove Lumnitzera racemosa Willd.

Nguyen Phuong Thao,Bui Thi Thuy Luyen,Chau Ngoc Diep,Bui Huu Tai,김은지,강희경,이상현,장해동,Nguyen The Cuong,Nguyen Van Thanh,Nguyen Xuan Cuong,Nguyen Hoai Nam,Chau Van Minh,김영호 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.4

This study performed phytochemical and bioactiveassessments of the mangrove Lumnitzera racemosaWilld. leaves. Bioassay-guided fractionation of the methanolicextracts led to the identification of thirty-six compounds(1–36), their structures were elucidated using detailed NMRspectroscopic and MS analysis. The extracts, fractions, andthe isolated compounds were screened for potential antioxidantand cytotoxic activities. Antioxidant assays wereperformed using peroxyl radical-scavenging and reducingassays, whereas cytotoxicity was measured using MTTassays in HL-60 and Hel-299 cell lines. The methanolicextract, CH2Cl2 and n-BuOH fractions (10.0 lg/mL)exhibited potent antioxidant activity, with Trolox equivalent(TE) values of 24.94 ± 0.59, 28.34 ± 0.20, and27.09 ± 0.37 (lM), respectively. In addition, the isolatedcompounds exerted cytotoxic effects in a dose-dependentmanner; compounds 1 and 14 exhibited the most potentcytotoxicity in HL-60 cells, with IC50 values of 0.15 ± 0.29and 0.60 ± 0.16 lM, respectively. To clarify the mechanism(s) behind these cytotoxic effects, we measured thetime-dependent changes in apoptotic markers including thecondensation and fragmentation of nuclear chromatin, andthe downregulation of p-ERK1/2, p-AKT, and c-Myc levels.

Four novel mutations in the androgen receptor gene from Vietnamese patients with androgen insensitivity syndrome

Nguyen Thu Hien,Nguyen Duc Quan,Kim Lien Nguyen Thi,Thi Thanh Ngan Nguyen,Nguyen Thi Phuong Mai,Tran Ngoc Dung,Nguyen Huy Hoang 한국유전학회 2023 Genes & Genomics Vol.45 No.4

Background Androgens and androgen receptor (AR) are critical regulators of the masculinization process in male sexual development. The absence of a functioning AR results in the development of the androgen insensitivity syndrome (AIS), a rare disorder of sexual development (DSD) characterized by the external genitalia feminization, gynecomastia, and impaired spermatogenesis. Objective To determine the AR gene mutations associated with male DSD in four unrelated Vietnamese patients. Methods To detect the disease-causing mutations, whole exome sequencing (WES) was performed on four patients diagnosed with AIS. Sanger sequencing was then used for validation of the identified mutations. Finally, 12 web-based tools, three-dimensional protein modeling software, and the guidelines issued by the American College of Medical Genetics and Genomics were used to assess the potential pathogenicity of these mutations. Results Four distinct novel mutations, namely c.1834T > A (p.Cys612Ser), c.2122 C > G (p.Leu708Val), c.2630T > G (p.Phe877Cys), and c.2641 C > A (p.Leu881Met) in the AR gene, were identified in four AIS patients using WES. The in silico analysis results revealed that the Cys612, Leu708, Phe877, and Leu881 sites are important for an appropriate response to androgens of the AR, and mutation at these sites can have adverse effects on the AR functions, androgen–AR interaction, and AR signaling pathway. Conclusions WES and in silico analyses strongly suggested that four novel AR mutations are pathogenic and have led to the development of AIS in the four Vietnamese patients under consideration.

Design of Thermostable Nanogel Systems for Use in the White Tiger Basement Reservoir to Increase the Effectiveness of Crude Oil Production

Nguyen Phuong Tung,Nguyen Thi Phuong Phong,Nguyen Hoang Duy,Nguyen Quoc Hung 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

This research was conducted to experimentally screen the suitability of acrylamido-2- methylpropane sulfonic acid-acrylamide (AMPS-AM) copolymer-based nanogels for using as sealants to shut-off water channels in the high-temperature and high-salinity reservoir conditions of the White Tiger oil feld. Via in situ intercalative free-radical copolymerization, nanogels have been prepared from montmorillonite-alkyl ammonium clay, AMPS and AM. Two primary compositions of nanogel systems were chosen. A mixture of hexamethylenetetramine (HMTA)/phenyl acetate (PhAc) was used as a crosslinking system. The results obtained from screening the gel properties by using the bottle test method, the test under nitrogen pressure and core ooding under imitated reservoir conditions show that the NANOSEAL-1 and the NANOSEAL-2 nanogels can well satisfy the VietsovPetro (VSP) technical requirements for water isolation materials. This research was conducted to experimentally screen the suitability of acrylamido-2- methylpropane sulfonic acid-acrylamide (AMPS-AM) copolymer-based nanogels for using as sealants to shut-off water channels in the high-temperature and high-salinity reservoir conditions of the White Tiger oil feld. Via in situ intercalative free-radical copolymerization, nanogels have been prepared from montmorillonite-alkyl ammonium clay, AMPS and AM. Two primary compositions of nanogel systems were chosen. A mixture of hexamethylenetetramine (HMTA)/phenyl acetate (PhAc) was used as a crosslinking system. The results obtained from screening the gel properties by using the bottle test method, the test under nitrogen pressure and core ooding under imitated reservoir conditions show that the NANOSEAL-1 and the NANOSEAL-2 nanogels can well satisfy the VietsovPetro (VSP) technical requirements for water isolation materials.