http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dong Kee Jeong,Neelesh Sharma,Thanh Luan Nguyen,Jong Hyun Kim,Sung Jong Oh 한국수정란이식학회 2014 한국동물생명공학회지 Vol.29 No.4
Phasianus colchicus is not only a beautiful bird but also a great value in science and under the threat of endanger. Hence, the aim of this study was to isolate the pheasant male germ cells (mGCs) and then induce them into elongated sperm-like cells in vitro. The mGCs were purified and enriched by a two-step plating method based on the different adherence velocities of mGCs and somatic cells. The percentage of the c-kit positive cells and c-kit negative cells examined by flow cytometry analysis (FCA) was 92.87% and 2.57%, respectively. Subsequently, the mGCs were induced for 48h in DMEM/F12 medium supplemented factors such as retinol acid, testosterone and bovine FSH, followed by 5 weeks in culture. We found that some elongated sperm-like cells appeared initially in vitro under inducement of stimulated factors. The elongated sperm-like cells showed in the expression of changed morphology and post-transcriptional marker such as spermatid associated (SPERT), spermatid perinuclear RNA binding protein (STRBP), round spermatid basic protein 1 (RSBN1) and SPER1L. Moreover, in DNA content identified assay, induced cells showed that the 1C DNA population markedly increased in differentiated group but it was not change in undifferentiated group. Successful in vitro differentiation of pheasant testicular germline cells into spermatids appears to offer extremely attractive potential for the conservation of endangered birds and treatment of male infertility.
Trajectory analyses of uncontrolled circular parachutes in random spatial wind fields
Thanh Dong Pham,Anh Tuan Nguyen,Vu Dan Thanh Le,Trung Kien Nguyen 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.8
The present paper explores the trajectories of two uncontrolled circular parachute models which differ in size and mass in random spatial wind fields. The wind velocity components were generated through three-dimensional inverse fast Fourier transforms; and the correlations of the simulation data compared with the theoretical functions to confirm the accuracy of the wind model. The parachute systems are modelled as six-degrees-of-freedom rigid bodies, on which the aerodynamic forces and moments are applied. The dynamics model was validated before being used to study the drop trajectories of the parachute systems in spatial wind fields. Analyzing the drop trajectories and the impact point dispersion characteristics of the two parachute systems, the paper shows that the smaller one oscillates at a higher frequency and is affected more strongly by the wind. While descending at low altitude, there could be resonance between the dynamics of the larger parachute model and the wind turbulence. Moreover, it is found that the use of simplified vertical wind profiles, which include only the variation of the wind velocity against the altitude, may cause significant error in the simulation results.
Dong, Nguyen-Thanh,Bae, Ki-Hwan,Kim, Young-Ho,Hwang, Gwi-Seo,Heo, Ok-Soon,Kim, Se-Eun,Kang, Jong-Seong The Pharmaceutical Society of Korea 2003 Archives of Pharmacal Research Vol.26 No.7
A reversed-phase high performance liquid chromatographic method was developed to determine the contents of psoralen and angelicin from some medicinal herbs. The optimum eluent for chromatography was 20 v/v% acetonitrile in water on a Zorbax 300SB $C_{18}$ column. The identification was carried out by comparing the retention time and mass spectra of the relevant peaks with their standards. The variation of the concentration of psoralen and angelicin was wide between different species. The seeds of Psoralea corylifolia showed the highest contents of psoralen (7.8 mg/g) and angelicin (2.3 mg/g) among the tested herbs.
Dong-Cheol Kim,Tran Hong Quang,Nguyen Thuy Tien,Kwan-Woo Kim,Youn-Chul Kim,Nguyen Thi Thanh Ngan,Nguyen Xuan Cuong,Nguyen Hoai Nam,Hyuncheol Oh 대한약학회 2022 Archives of Pharmacal Research Vol.45 No.2
Penicillium is a rich source of bioactive compounds. Among all Penicillium species, Penicillium oxalicumhas been reported to produce various types of secondarymetabolites, including alkaloids, phenolics, and tetrahydroxanthonedimeric compounds, exhibiting many pharmacologicaleff ects, such as antiviral, antibacterial, and cytotoxicactivities. Three secondary metabolites were isolated from afermented culture of the sponge-associated fungal strain P. oxalicum CLC-MF05: oxaline ( 1 ), isorhodoptilometrin ( 2 ),and 5-hydroxy-7-(2′-hydroxypropyl)-2-methyl-chromone( 3 ). Their chemical structures were identifi ed by 1D and2D NMR and high-resolution mass spectroscopic analysesand compared with previously reported data. All three compoundsinhibited NO and PGE 2 overproduction and iNOSand COX-2 overexpression in both LPS-stimulated BV2and rat primary microglia. These metabolites also repressed mRNA expression of TNF-α, IL-1β, IL-6, and IL-12. Further,mechanistic studies revealed that the inhibitory actionsof compounds 1–3 were regulated by the inactivation of theNF-κB and MAPK signaling pathways. Furthermore, inactivationof the TLR4/MyD88 pathway contributed to theanti-neuroinfl ammatory activity of these compounds. Theseresults suggest that compounds 1–3 represent potential antiinflammatory candidates for the treatment of neurodegenerativediseases; however, further investigation is needed.
Nguyen Duy Dat,Ton That Loc,Mai Thuan Trieu,Dong Thanh Nguyen,Khuong Quoc Nguyen,My Linh Nguyen,Anh Duy Duong Le,Hai Nguyen Tran 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
Two new composites from synthetic clay-like materials and carbon spheres were developed. Layered doubledhydroxides (LDH) were synthesized from the coprecipitation of Mg2+ and Al3+ ions. Spherical hydrochar (SH) wasprepared from pure glucose through hydrothermal carbonization at 190 oC. The composite LDH–SH was synthesizedthrough a simple hydrothermal method of the mixture of LDH and SH. Another composite, LDO-SB, was directly preparedthrough the carbonization of LDH-SH at 500 oC. Under such high temperature, LDH was converted to layereddoubled oxides (LDO), and SH was transferred to spherical biochar (SB). Those materials were characterized by chemicalstability, surface morphology and element composition, crystal structure, surface functional group, and texturalcharacteristic. They were applied for removing cationic dye (methylene blue; MB) and anionic dye (Congo red; CR)under different pH solutions. Three adsorption components—kinetics, isotherm, and thermodynamics—were conductedunder batch experimenters. Results demonstrated that the LDH or LDO particles were assembled on the surfaceof SH or SB, respectively. The surface area, total pore volume, and average pore width of LDH–SH and LDO-SBwere 58.5 and 198m2/g, 0.319 and 0.440 cm3/g, and 21.8 and 8.89 nm, respectively. The maximum adsorption capacityof the materials, calculated from the Langmuir model, at 30 oC for CR and MB dyes was 1589 and 78.6mg/g (LDOSB)and 499 and 226mg/g (LDH-SH), respectively. The composites exhibited a higher affinity to anionic than cationicdyes, which resulted from the great contribution of the clay-like materials. Therefore, they can serve as a promisingcomposite for the decolorization of wastewater.
Le Nguyen Thanh Dong,Nguyen Ngoc Duy Phuong 한국유통과학회 2018 The Journal of Asian Finance, Economics and Busine Vol.5 No.3
Higher Education Institutions (HEIs) are place contributing to the intellectual advancement of the nation, quality human resource, and to a number of socio-economic improvements for society and organizations. Despite facilitators and staffs are the bare-bone of HEIs, there is a scarcity of research, both conceptual and empirical, focusing on their organizational citizenship behaviors (OCB). To attempt to fill this gap, this article develops a conceptual model of OCB under influencing of organizational justice and job satisfaction. The prospective respondents were chosen randomly from HEIs (public and private). Individuals have been employed at least one year and above will be the unit of analysis in which the experimental test of the proposed model will be conducted. The results suggest that organizational citizenship behavior is one of the most important factor influence the organizational performance. Furthermore, the performance of HEIs does not affect only the national human resources, but also impact on national economy. In this context, a conceptual framework is proposed to study the determinants of organizational citizenship behavior in the form of organizational justice and job satisfaction. Additionally, the ultimate benefits of OCB through perceived organizational justice with job satisfaction as mediator is enlightened. Finally, the authors discuss the managerial implications of their research.
Le Nguyen Thanh Dong,Nguyen Ngoc Duy Phuong 한국유통과학회 2017 KODISA ICBE (International Conference on Business Vol.2017 No.-
Higher Education Institutions (HEIs) are place contributing to the intellectual advancement of the nation, quality human resource, and to a number of socio-economic improvements for society and organizations. To achieve the objectives of the study, the structural equation modeling, particular, a partial least square method (PLS) is suitable since this techniques permits the simultaneous estimation of multiple equations and performs factor analysis including regression analysis. Despite facilitators and staffs being the bare-bone of HEIs, there is a dearth of research, both conceptual and empirical, focusing on their perceived of organizational justice and its impact on employees’ job satisfaction, organizational commitment, organizational citizenship behaviors (OCB). To attempt to fill this gap, this article develops a conceptual model on OCB with the organizational justice the influence of the job satisfaction on the organizational commitment and OCB. OCB is one of the most important factor influence the organizational performance. Furthermore, the performance of HEIs will does not effects only the national human resources, but also impact on national economy. Finally, the authors discuss the managerial implications of their research and offer guidelines for future empirical research.