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Continuous Behavior of Using Food Delivery Mobile Applications in Vietnam after Covid-19 Pandemic
Ha Thu LUONG(Ha Thu LUONG ),Nhi Lan DAO(Nhi Lan DAO ),Trang Thu NGUYEN(Trang Thu NGUYEN ),Uyen Thu Thi LA(Uyen Thu Thi LA ),Na Thi Le TRAN(Na Thi Le TRAN ),Hoa Thi DUONG(Hoa Thi DUONG ) 한국유통과학회 2023 유통과학연구 Vol.21 No.3
Purpose: During and after Covid-19 pandemic, technology has emerged as a key factor in supporting the recovery of the economy and the rise of living standards. This study examines seven factors affecting the intention of food delivery apps usage, which include Performance Expectancy, Effort Expectancy, Social Influence, Hedonic Motivation, Price Value, and Habit, and how much influence they have on the customers' behavioral continuance of food delivery apps after Covid-19 Pandemic. Research methodology: This research is a quantitative descriptive research with 473 qualified respondents from 550 respondents collected. Besides using the UTAUT2 model (Venkatesh et al., 2012), Information Quality was added to give a better explanation for the consumers’ intention towards continuance behavior using food delivery apps. The collected data is then processed using SPSS 22.0. Results: Habit factors and Information Quality factors have significant positive effects on promoting food delivery apps usage intention, which in turn influences continuance behavior. In addition, Habit factors and Information Quality factors together have an effect of 48.57% on Behavioral Intention. Conclusion: The result proves that positive habits and food information quality can increase the usage intention towards the behavioral continuance of consumers. Higher usage frequency can be improved by increasing these two factors.
Compounds from the Aerial Parts of Aceriphyllum rossii and Their Cytotoxic Activity
Thi Thu Trang Tran,민병선,Thi Yen Nguyen,Manh Hung Tran,원권연,우미희 한국생약학회 2014 Natural Product Sciences Vol.20 No.3
The purification of the MeOH extracts from the aerial parts of Aceriphyllum rossii Engler (Saxifragaceae) using column chromatography furnished fourteen compounds (1 - 14). The chemical structures of the isolated compounds were determined using mainly nuclear magnetic resonance spectra and mass spectrometry. All the isolated compounds were tested for their cytotoxic activity against LH-60, MCF-7 and HeLa cancer cells in vitro using a MTT assay method. Compounds possessing an olean-triterpenoid skeleton entirely exhibit dose dependent cytotoxic activity. These findings partially confirmed the anticancer effect of this medicinal plant, suggesting a further study on the anticancer potential of the triterpenoid structure in compounds from this plant.
Thuy Thi Thu Nguyen,Huu The Nguyen,Hai Thi Trinh,Trang Thi Thu Bui,Anh-Tuan Le,Tran Quang Huy 한국고분자학회 2022 Macromolecular Research Vol.30 No.2
In this study, the Pb2+ adsorption capacity of electrospun polyvinylidene fluoride/graphene oxide (PVDF/GO) membranes with different morphological characteristics and compositions were comprehensively compared. Firstly, the chemical characteristics, morphological characteristics and hydrophobicity relating to the adsorption capacity of electrospun PVDF/GO membranes were investigated through Fourier transform infrared spectroscopy, Raman spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy and water contact angle measurement. Adsorption analysis showed that the adsorption performance of electrospun PVDF/ GO increased as GO contents increased. Variations in the average diameter of electrospun PVDF/GO fibres in the range of several micrometres did not cause a distinguishable change in their adsorption capacity. Electrospun PVDF/GO membranes without a porous structure inhibited a low adsorption capacity although they contained a high composition of GO. The modification of electrospun PVDF/GO membranes by adding PEG increased the distribution of GO on the surface of fibres, resulting in a more hydrophilic fibre surface and a notable increase in Pb2+ adsorption. The adsorption behaviour of Pb2+ onto electrospun PVDF/GO/PEG membranes was found to be dependent on contact time and pH. Reusability analysis indicated that the electrospun PVDF/GO/PEG membrane maintained a Pb2+ removal rate of over 80% after six adsorption-desorption cycles. Therefore, electrospun PVDF/GO/PEG membranes might be a promising adsorption material used in filtration systems for heavy metal removal.
Compounds from the Aerial Part of Saururus chinensis and Their Cytotoxic Activity
민병선,Tran Thi Thu Trang 한국생약학회 2012 Natural Product Sciences Vol.18 No.4
Ten known compounds, 7-hydroxysauchinone (1), sauchinone (2), di-O-methyltetrahydrofuriguaiacin B (3), henricine (4), saucerneol K (5), meso-dihydroguaiaretic acid (6), (-)-guaiacin (7), (3R,4S)-4-(4-hydroxy-3-methoxyphenyl)-4-methoxy-3-methylbutan-2-one (8), (E)-7-(4-hydroxy-3-methoxyphenyl)-7-methylbut-8-en-9-one (9), and licarin A (10), were isolated from aerial part of Sarurus chinensis. The chemical structures of these compounds were determined on the basis of spectroscopic analyses including 2D NMR. Compounds 1 - 10 were evaluated for their cytotoxic activity against the HL-60, MCF-7, and A549 cancer cell lines in in vitro.
NGUYEN Dang Thu Cuc,TRAN Thi Huong Trang 서울대학교 아시아태평양법연구소 2018 Journal of Korean Law Vol.18 No.1
Being a member of the Convention on Biological Diversity (CBD)since 1994, being 31st member of the Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization (NP) since 2014, Vietnam is making its efforts to improve ABS legislation and policy to implement the NP. A master scheme on capacity building on ABS adopted by Prime Minister Nguyen Xuan Phuc was issued in 2016 to implement ABS was promulgated. Decree No. 59/2017/ND-CP, dated May 12, 2017, on the management of access to Genetic Resources (GRs) and the sharing of benefits arising from their utilization (Decree 59) made an important remark in development of ABS law and policy in Vietnam. This Decree covers all basic issues of ABS, detailing the Law on Biodiversity, which was promulgated in 2008 and internalizing the NP in ABS national law. These include essential elements: determining scope definitions, main actors: providers, users, national focal points (NFP), national competent agencies (NCA), benefit sharing, compliance. In spite of important achievements in ABS law development and implementation to date, there remain some weaknesses and shortcomings within the legal system, institutions to facilitate ABS law being implemented well in practice. There are not only the gaps between laws, unclear demarcation of inter-ministerial assigned issues, but also limitation in terms of capacity and awareness of involved actors on ABS issues. This article aims to analyze all these above mentioned points, recommends improving ABS law and policy as well as provides suggestion to overcome limitation.
Minh-Huy Dinh Dang,Trang Thi Thu Nguyen,Bao Quang Gia Le,Linh Ho Thuy Nguyen,Ngoc Xuan Dat Mai,My Van Nguyen,Phuong Hoang Tran,Tan Le Hoang Doan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
Pd-incorporated Zr-based metal–organic framework containing sulfone groups, named Pd(II)BUT-11, wassuccessfully prepared by dispersing the sulfone-functionalized MOF in Pd(OAc)2 solution. X-ray diffraction,scanning electron microscopy, N2 isotherm sorption, X-ray photoelectron spectroscopy, and thermogravimetricanalysis were applied to determine the features of the Pd-incorporated MOF. In the catalyticstudies, Pd(II)@BUT-11 was shown to be an efficient heterogeneous catalyst for synthesizing various stilbenederivatives via the cross-coupling Heck reaction with DABCO-derived deep eutectic solvent (DES) asa green solvent. Notably, the catalyst and the solvent could be recovered and reused, with their activityand structure remaining stable throughout several trials. The method provides an alternative solution tothe conventional catalysts and solvents, resulting in a green and efficient stilbene synthesis process. Furthermore, the stilbenes were separated by extraction with ethyl acetate due to the low solubility ofDES with this solvent.