http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fabrication and Evaluation of Human Dentin as Scaffold for Dental Pulp Stem Cells
Ha Le Bao Tran,My Thi Ngoc Nguyen,Vu Nguyen Doan 한국조직공학과 재생의학회 2015 조직공학과 재생의학 Vol.12 No.4
Scaffold is an important component of tissue engineering. Dentin is a potential material satisfying not only the physical and chemical characteristics of a standard scaffold, but also the inductive factors demand for dentin regeneration. Therefore, it is a promising material for tissue engineering. In this study, we aimed to create and characterize dentin scaffolds in order to serve as bioactive scaffolds for human dental pulp stem cells (hDPSCs) toward dentin-like tissue regeneration. Human dentin scaffolds were obtained from extracted teeth and irrigated in 17% ethylenediaminetetraacetic acid (EDTA) and 19% citric acid as chelate agents to remove smear layer. The treated scaffolds were examined morphology, the presence and secretion of dentin matrix protein, and in vitro cytotoxicity. The results demonstrated that 17% EDTA and 19% acid citric effectively removed smear layer. The presence of dentin matrix proteins, including transforming growth factor beta-1 and dentin matrix protein-1 were found to be secreted from human treated dentin scaffolds (hTDSs) during 5 days of investigation. hTDSs showed low level of cytotoxicity, which elicited a safe manner. Moreover, hTDSs provided a suitable surface for the attachment of hDPSCs, as well as supported their proliferation. When culturing hDPSCs onto the scaffolds, the formation of dentin-like tissue indicated their potential in directing differentiation of hDPSCs into dentin regeneration process, possibly, via bioactivity of the secreted dentin matrix proteins. Taken together, these data demonstrated that our proposed protocol was effective in generating hTDSs, and maintaining their compromising properties for application in regeneration of human dentin.
Determinants Influencing Housing-Option Decision of Gen Y: The Case of Vietnam
Ha Thu LUONG(Ha Thu LUONG ),Dung Manh TRAN(Dung Manh TRAN ),Dan Linh Ngoc NGUYEN(Dan Linh Ngoc NGUYEN ),Van Bao NGUYEN(Van Bao NGUYEN ),Anh Thuc LE(Anh Thuc LE ),Hieu Van PHAM(Hieu Van PHAM ) 한국유통과학회 2023 유통과학연구 Vol.21 No.7
Development of an AI Chatbot to Support Admissions and Career Guidance for Universities
Le Hoanh Su,Truong Dang-Huy,Tran Thi-Yen-Linh,Nguyen Thi-Duyen-Ngoc,Ly Bao-Tuyen,Nguyen Ha-Phuong-Truc ASCONS 2020 INTERNATIONAL JOURNAL OF EMERGING MULTIDISCIPLINAR Vol.4 No.2
The vocational guidance and advising education enrollment are one of the most important tasks in the enrollment process and promote the quality and reputation of the University. Admissions counseling offices at Universities and Colleges play a major role in vocational guidance and advising education enrollment. However, the support of these units is limited by office hours, speed and advisory efficiency, and besides, handling and answering questions process may also encounter obstacles such as: overload, misinformation, problem with the transmission, language barriers, expressions, limited time, support resources,… Thus we decided to do research to understand this situation. Then creating a dataset supports vocational guidance and advising education enrollment activities. We also design and integrate chatbot into the school system to support the admissions counseling process.
Dieu Linh Tran,Anh Phuong Nguyen Hong,Ngoc Hoi Nguyen,Ngoc Trinh Huynh,Bao Ha Le Tran,Cam Tu Tran,Minh Dung Truong,Quan Dang Nguyen,박기동,Dai Hai Nguyen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
α-calcium sulfate hemihydrate (α-HH) was synthesized by salt solution methods to prepare a promising biomaterial for bone tissue repair and regeneration. The successful synthesis of α-HH was evaluated by field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) scanning. The sterility of α-HH before and after irradiation with gamma ray was firstly confirmed by Colonies Forming Units (CFU) counting assay, to target the surgical grade application. In vitro tetrazolium bromide (MTT) assay, crystal violet (CV) and acridine orange (AO) staining was performed to assess the initial cytotoxicity and cell attachment ability of α-HH. Further in vivo implantation into rabbit distal femoral condyles defect exhibited the ability of salt solution-synthesized α-HH to promote the localization of osteocytes and osteoblasts, which improve the bone tissue repair and regeneration. The findings suggested that α-calcium sulfate hemihydrate synthesized by salt solution method is a potential material that can be used as bone substitutes.
Bien Dong Che,Le-Thu T. Nguyen,Bao Quoc Nguyen,Ha Tran Nguyen,Thang Van Le,Nieu Huu Nguyen 한국고분자학회 2014 Macromolecular Research Vol.22 No.11
Radar absorbing materials (RAMs) for practical applications are expected not only to have strong microwaveabsorption and a wide absorption bandwidth, but also to be lightweight, to have a fine thickness and acceptablestructural performance, as well as being cost-effective. Although the dispersion of carbon-nanofillers in polymermatrices is a key factor determining the microwave absorbing properties of the composites, there have few studieson these effects. To our knowledge, to date, the realization of pristine multi-walled carbon nanotube (MWCNT)/polymercomposites as RAMs in industrial production has been restricted, due to high CNT contents or large composite thicknesses. Thus, in this work, two MWCNT dispersion processing methods, a solution process with surfactant-aid anda ball-milling dispersion, were investigated to fabricate pristine MWCNT/epoxy nanocomposites. The effects of thedifferent dispersion processes, CNT loading, and composite thickness on CNT dispersion in the matrix, were observedby TEM, and the electrical conductivity and X-band absorbing performance of the composites were assessed. Theuse of an ionic surfactant to aid the dispersion of CNTs in solution resulted in the best RAMs, with a good compromiseamong effective X-band absorption, small composite thickness, and very low CNT content. The ball-millingmethod also resulted in materials with a low CNT content and microwave absorbing performance acceptable forindustrial applications. Moreover, it offers a very simple and efficient route suitable for low-cost, mass productionof RAMs. The results showed that by facile approaches of dispersing pristine commercial MWCNTs in an epoxyresin matrix, composites of only 2-3 mm thickness and as little as 0.25-0.5 wt% CNT loading could be obtained,with a relatively wide X-band operating bandwidth and maximum absorptions exceeding 18-25 dB.
Nhung Thanh Thi Truong,Tam Huu Nguyen,Bao Kim Doan,Le-Thu T. Nguyen,Tam Hoang Luu,Chau Duc Tran,Thiet Quoc Nguyen,Ha Tran Nguyen 한국고분자학회 2021 Macromolecular Research Vol.29 No.11
In this research, three organic photocatalysts, 4-(4H-dithieno[3,2-b:2',3'- d]pyrrol-4-yl)-N,N-diphenylaniline, 4-(pyren-1-yl)-4H-dithieno[3,2-b:2',3'-d]pyrrole and 4-(6b,10-dihydroperylen-3-yl)-4H-dithieno[3,2-b:2',3'-d]pyrrole have been successfully synthesized through C-N coupling reactions. The chemical structures and the optical properties of the obtained organic photocatalysts have been characterized via 1H NMR,13C NMR, elemental analysis, and UV-Vis spectroscopy. Next, these dithieno[3,2-b:2′,3′-d]pyrrole-based photocatalysts have been used for the polymerization of methyl methacrylate, 2-(dimethylamino)ethyl methacrylate and tert-butyl methacrylate monomers under 365 nm UV irradiation, resulting in (meth)acrylate polymers with controlled molecular weights and low polydispersity indexes.
Factors Affecting Logistics Capabilities for Logistics Service Providers: A Case Study in Vietnam
Dinh Dao DANG,Dieu Linh HA,Van Bao TRAN,Van Tuan NGUYEN,Thi Lien Huong NGUYEN,Thuy Hong DANG,Thi Thai Ha LE 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5
This study aimed to investigate the factors affecting Logistics capabilities for Logistics Service Providers in Vietnam. Researchers inherited and developed based on previous research to focus on analyzing and evaluating dynamics, measuring Logistics capabilities, and the factors affecting Logistics capabilities for Logistics Service Providers. The logistics capabilities Model is used based on three factors: customer demand management capability, innovation capability, and information management capability. The empirical analysis used data from the survey data of l90 managers of Logistics Service Providers in Hai Phong, Ho Chi Minh City, Da Nang, Hue, Hanoi with reliable tools (SPSS 26.0 software). The data were analyzed by frequencies, percentages, means, Pearson’s Linear Correlation Coefficient, exploratory factor analysis, and multi-linear regression model based on the survey data. The research results identified the following factors affecting Logistics capabilities for Logistics Service Providers: innovation capability has the strongest impact on Logistics capabilities; customer demand management capability has the following strong effects on Logistics capabilities; and finally, information management capability that affects Logistics capabilities. There is also a positive relationship between all factors and Logistics capabilities. Several recommendations are further suggested to enhance to improve Logistics capabilities for Logistics Service Providers in Vietnam.