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Determinants Influencing Entrepreneurial Intention among Undergraduates in Universities of Vietnam
BUI, Thi Hong Viet,NGUYEN, Thi Le Thuy,TRAN, Manh Dung,NGUYEN, Thi Anh Thu Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.7
The paper aims to identify the determinants that influence entrepreneurial intention among National Economics University graduates. For the sample size, we conducted a questionnaire survey of 250 full-time third-year undergraduates at the National Economics University, with convenience sampling technique. Of those 250 undergraduates, 150 were Business Administration students and 100 Economy Management students. After eliminating invalid responses due to lack of information or low quality information, 215 responses were used (93.07% of respondents) for data analysis. The results show that the factor "Perceived desirability" has the strongest impact on the intention to start a business. It is followed by the factor "Perceived feasibility" in which the "ability to search and plan for start-up" has a stronger influence on undergraduates' entrepreneurial intention than the "leadership and ability to overcome adversity". The hypothesis of a positive relationship between undergraduates' propensity to act and their intention to start a business is also supported in this study. Based on the results, we suggest some recommendations for the university and State management agencies to nurture and develop entrepreneurial intention of undergraduates, forming the young generation of potential entrepreneurs to contribute to the development of emerging countries such as Vietnam, the case study.
Bui Hanh Thi Hong,Ngo Son Ich,임영일 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.10
Separation efficiency of flat- and domed-roof cyclones was investigated in a polypropylene (PP) production process at 20 bar and 80 °C, using computational fluid dynamics (CFD) coupled with the Reynolds stress model for gas turbulence and a discrete random walk model for particles. The geometry of the domed-roof cyclone was based on a high-efficiency Stairmand cyclone and the ASME standard for high-pressure vessels. The meshing strategy and CFD model validation of the cyclones were performed systematically. At an inlet velocity of 20 m/s and atmospheric pressure, the fractional separation efficiency of the domed-roof cyclone was 1.5% higher than that of the flat-roof cyclone in an air-CaCO3 system for particle sizes ranging from 0.1 to 100 µm. Under the high-pressure operating conditions of the domed-roof cyclone, the diameter (De) of the vortex finder was selected as 40% of the cyclone barrel diameter (D), maintaining its high separation efficiency and moderate pressure drop. The optimized domed-roof cyclone achieved an 8.4% higher mean fractional separation efficiency and a 6.4% lower pressure drop compared to a standard flat-roof cyclone for PP particles from 1 to 40 µm. The CFD result provides a useful guide for designing a high-efficiency domed-roof cyclone at high pressures.
LOCAL-GLOBAL PRINCIPLE AND GENERALIZED LOCAL COHOMOLOGY MODULES
Bui Thi Hong Cam,Nguyen Minh Tri,Do Ngoc Yen Korean Mathematical Society 2023 대한수학회논문집 Vol.38 No.3
Let 𝓜 be a stable Serre subcategory of the category of R-modules. We introduce the concept of 𝓜-minimax R-modules and investigate the local-global principle for generalized local cohomology modules that concerns to the 𝓜-minimaxness. We also provide the 𝓜-finiteness dimension f<sup>𝓜</sup><sub>I</sub> (M, N) of M, N relative to I which is an extension the finiteness dimension f<sub>I</sub> (N) of a finitely generated R-module N relative to I.
Influences of Xeno-Free Media on Mesenchymal Stem Cell Expansion for Clinical Application
Bui Hue Thi Hong,Nguyen Liem Thanh,Than Uyen Thi Trang 한국조직공학과 재생의학회 2021 조직공학과 재생의학 Vol.18 No.1
Mesenchymal stem/stromal cells (MSCs) are multipotent somatic stem/progenitor cells that can be isolated from various tissues and have attracted increasing attention from the scientific community. This is due to MSCs showing great potential for incurable disease treatment, and most applications of MSCs involve tissue degeneration and treatment of immune- and inflammation-mediated diseases. Conventional MSC cultures contain fetal bovine serum (FBS), which is a common supplement for cell development but is also a risk factor for exposure to animal-derived pathogens. To avoid the risks resulting from the xenogeneic origin and animal-derived pathogens of FBS, xeno-free media have been developed and commercialized to satisfy MSC expansion demands for human clinical applications. This review summarized and provided an overview of xeno-free media that are currently used for MSC expansion. Additionally, we discussed the influences of different xeno-free media on MSC biology with particular regard to cell morphology, surface marker expression, proliferation, differentiation and immunomodulation. The xeno-free media can be serum-free and xeno-free media or media supplemented with some human-originating substances, such as human serum, human platelet lysates, human umbilical cord serum/plasma, or human plasma-derived supplements for cell culture medium. These media have capacity to maintain a spindle-shaped morphology, the expression of typical surface markers, and the capacity of multipotent differentiation and immunomodulation of MSCs. Xeno-free media showed potential for safe use for human clinical treatment. However, the influences of these xeno-free media on MSCs are various and any xeno-free medium should be examined prior to being used for MSC cultures.
Hong Thi Bich Truong,Hiep Nghia Bui,Hieu Trung Nguyen,Thanh-Luu Pham,Duy Ngoc Nguyen,Yuan-Shing Perng,Linh Thi My Lam,Thi-Dieu-Hien Vo,Van-Truc Nguyen,Ha Manh Bui 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
Electron-beam (EB) irradiation was employed to degrade enrofloxacin (ENR) in an aqueous solution. Thealgal growth inhibition test revealed that ENR exhibited low toxicity against the cyanobacterium Arthrospira sp., with anEC50-96 h value of 5.17mg/L. The Taguchi design also involved finding the best optimum for ENR treatment using EB. Results revealed that the high-efficiency removal of ENR in an aqueous solution was approximately 98.53% under theoptimum conditions of an absorbed dose of 5 kGy, a pH of 5.0, and an initial ENR concentration of 10 mg/L and anH2O2 concentration of 2mM. The ERR degradation under a couple of EB irradiation and H2O2 followed pseudo-firstorderkinetics, with an R2 of ~0.970. The major degradation pathways of ENR were suggested by density functional theory,natural bond orbital calculations, and liquid chromatography-tandem mass spectrometry (LC/MS/MS) analysis. Lifecycle assessment (LCA) was also performed to evaluate the impact of the EB on removing ENR; the industrial processwas designed based on laboratory tests aimed with the ReCiPe tool. The obtained results indicated that energy consumptionand H2O2 affect environmental impacts with order human health, ecology systems, and natural resource. The LCAalso proved that EB could be a green and efficient method for eliminating pharmaceutical contaminants in water.
Tai, Bui Huu,Nhut, Nguyen Duy,Nhiem, Nguyen Xuan,Quang, Tran Hong,Thanh Ngan, Nguyen Thi,Thuy Luyen, Bui Thi,Huong, Tran Thu,Wilson, Jennifer,Beutler, John A.,Ban, Ninh Khac,Cuong, Nguyen Manh,Kim, Yo Informa Healthcare 2011 PHARMACEUTICAL BIOLOGY Vol.49 No.10
<P><I>Context</I>: Acquired immune deficiency syndrome (AIDS) is a severe pandemic disease especially prevalent in poor and developing countries. Thus, developing specific, potent antiviral drugs that restrain infection by human immunodeficiency virus type 1 (HIV-1), a major cause of AIDS, remains an urgent priority.</P><P><I>Objective</I>: This study evaluated 32 extracts and 23 compounds from Vietnamese medicinal plants for their inhibitory effects against HIV-1 ribonuclease H (RNase H) and their role in reversing the cytopathic effects of HIV.</P><P><I>Materials and methods</I>: The plants were air-dried and extracted in different solvent systems to produce plant extracts. Natural compounds were obtained as previously published. Samples were screened for RNase H inhibition followed by a cytopathic assay. Data were analyzed using the Microsoft Excel.</P><P><I>Results and discussion</I>: At 50 μg/mL, 11 plant extracts and five compounds inhibited over 90% of RNase H enzymatic activity. Methanol extracts from <I>Phyllanthus reticulatus</I> and <I>Aglaia aphanamixis</I> leaves inhibited RNase H activity by 99 and 98%, respectively, whereas four extracts showed modest protection against the cytopathic effects of HIV.</P><P><I>Conclusion</I>: The screening results demonstrated that the butanol (BuOH) extract of <I>Celastrus orbiculata</I> leaves, methanol (MeOH) extracts of <I>Glycosmis stenocarpa</I> stems, <I>Eurya ciliata</I> leaves, and especially <I>P. reticulatus</I> leaves showed potential RNase H inhibition and protection against the viral cytopathic effects of HIV-1. Further chemical investigations should be carried out to find the active components of these extracts and compounds as potential anti-HIV drug candidates.</P>
The Interaction between Labor Productivity and Competitiveness in Vietnam
Nguyen Thi DONG,Tran Thi Ai DIEM,Bui Thi Hong CHINH,Nguyen Thi Diu HIEN 한국유통과학회 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.11
This study measures the relationship between labor productivity and national competitiveness. Through the shift- share analysis method, the paper has separated labor productivity into three factors: static shift effect, dynamic shift effect and endogeneous effect. Next, in combination with the Granger causality test, the paper examines the relationship between the factors constituting labor productivity and competitiveness during the period from 2005 to 2017. Research data is collected from General Statistics Office and annual global competitiveness reports. The results show that the interaction between labor productivity with global competitiveness index (GCI) in Vietnam has similar variation. Nevertheless, when separating labor productivity into three effects, this relationship shows more clearly that the impact of labor productivity on GCI scores is mainly caused by endogeneous effect, not by static shift effect or dynamic shift effect. Therefore, in order to improve its competitiveness, Vietnam should focus on a number of solutions: reforming the education system towards developing thinking capacity and creative capacity; fostering industrial manners to create dynamic and flexible workers; building the State with sufficient capacity to implement consistent and transparent policies; formulating policies to attract all economic sectors so that they actively participate in the field of human resource training for the country.
Nguyen Thi Hong Chien,Thi Lan Nguyen,Khanh Linh Bui,Tho Van Nguyen,Thanh Hoa Le 대한기생충학ㆍ열대의학회 2019 The Korean Journal of Parasitology Vol.57 No.1
Anaplasma marginale and A. platys were detected and characterized (16S rDNA sequence analysis) from dairy and indigenous cattle, and the latter in domestic dogs in Vietnam. A phylogenetic tree was inferred from 26 representative strains/species of Anaplasma spp. including 10 new sequences from Vietnam. Seven of our Vietnamese sequences fell into the clade of A. marginale and 3 into A. platys, with strong nodal support of 99 and 90%, respectively. Low genetic distances (0.2-0.4%) within each species supported the identification. Anaplasma platys is able to infect humans. Our discovery of this species in cattle and domestic dogs raises considerable concern about zoonotic transmission in Viet- nam. Further systematic investigations are needed to gain data for Anaplasma spp. and members of Anaplasmataceae in animal hosts, vectors and humans across Vietnam.
Chemical constituents of the Annona glabra fruit and their cytotoxic activity.
Hien, Nguyen Thi Thu,Nhiem, Nguyen Xuan,Yen, Duong Thi Hai,Hang, Dan Thi Thuy,Tai, Bui Huu,Quang, Tran Hong,Tuan Anh, Hoang Le,Kiem, Phan Van,Minh, Chau Van,Kim, Eun-Ji,Kim, Seung Hyun,Kang, Hee Kyoun Swets Zeitlinger 2015 PHARMACEUTICAL BIOLOGY Vol.53 No.11
<P>Traditional Chinese medicines have attracted increasing interest as potential sources of novel drugs with a wide range of biological and pharmacological activities. Annona glabra Linn (Annonaceae) is used in traditional medicine as an anticancer drug. Phytochemical investigation of this plant led to the isolation of acetogenins, ent-kauranes, peptides, and alkaloids. In addition, compounds exhibited anticancer, anti-HIV-reserve, and antimalaria.</P>