http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Nguyen Thai Son ),( Vu Thi Thu Huong ),( Vu Thi Kim Lien ),( Do Thi Quynh Nga ),( Tran Thi Hai Au ),( Tang Thi Nga ),( Le Nguyen Minh Hoa ),( Tran Quang Binh ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.9
The extensive distribution of multidrug-resistant (MDR) methicillin-resistant Staphylococcus aureus (MRSA) poses a threat to healthcare worldwide. This study aimed to investigate the MDR and molecular patterns of MRSA isolates in children admitted to the two biggest tertiary care pediatric hospitals in northern and southern Vietnam. A total of 168 MRSA strains were collected to determine antibiotic susceptibility by minimum inhibitory concentration tests. Antibiotic-resistant genes, pulsed-field gel electrophoresis, staphylococcal cassette chromosome mec (SCCmec) typing, and multilocus sequence typing were used for the molecular characterization of MRSA. Among the total strains, the MDR rate (51.8%) was significantly higher in the northern hospital than in the southern hospital (73% vs. 39%, p < 0.0001). The MDR-MRSA with the highest rates were “ciprofloxacin-erythromycin-gentamicin-tetracyclines” (35.6%), followed by “erythromycin-tetracycline-chloramphenicol” (24.1%), and “ciprofloxacin-erythromycin-gentamicin” (19.5%), showing an accumulative total of 79.3%. The most susceptible antibiotics were rifampicin (100%) and vancomycin (100%), followed by doxycycline (94.0%), meropenem (78.0%), and cefotaxime (75.0%). The SCCmecII strains showed greater resistance to gentamicin, ciprofloxacin, tetracycline, meropenem and cephalosporins compared with the other strains. The SCCmecII strains exhibited the highest rate in the tested genes (aacA/aphD: 55.2%, ermA/B/C: 89.7%, and tetK/M: 82.8%). ST5-SCCmecII was the predominant clone in the northern hospital, whereas SCCmecIVa was more pronounced in the southern hospital. In conclusion, our results raised concerns about the predominant MDR-MRSA strains in the pediatric hospitals in Vietnam. The north-south difference in the antibiotic resistance patterns and genetic structure of MRSA suggests different MRSA origins and various uses of antimicrobial agents between the two regions.
Cung Huu NGUYEN,Thi Truc Quynh PHAM,Thi Hoa TRAN,Thi Hoa NGUYEN 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.11
Foreign capital inflows play an essential role in each country’s socio-economic growth, particularly for undeveloped and developing countries where capital accumulation is limited in the early stages of development, and Vietnam is no exception. The purpose of this article is to examine the impact of foreign capital inflows on economic growth in Vietnam. The empirical method employed secondary time-series data set during the period 1995–2018 to determine the impact of FDI, foreign aid, foreign loans, and exports on economic growth in Vietnam by using a linear approach. For this study, data was collected from the World Bank and relevant agencies in Vietnam. The results show that FDI (net inflows), foreign aid, foreign loans, exports, and GDP (current), have a positive effect at a 1% significance level on economic growth. Rather, an increase in FDI (net inflows), foreign aid, foreign loans, exports has beneficial effects on the Vietnamese economy in the study period. Based on the findings of this study, the article proposes several important policy implications for Vietnam in maintaining a high rate of economic growth via the contribution of FDI inflows, foreign aid, foreign loans, and exports.
Highly Photoconductive CdS Thin Films Synthesized by Using Chemical Bath Deposition
Ch. Kiran Kumar,Nguyen Thi Quynh Hoa,윤순길,이지홍,Geun-Hong Kim,김의태 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
We report the effects of the concentration of a base (NH3) and a complexing agent (triehtylamine (TEA)) on the photoconductive characteristics and growth mechanism of CdS films synthesized by using the chemical bath deposition technique. Highly photoconductive CdS thin films were successfully grown on glass substrates at 80℃ under a sulfur-poor environment, i.e. a Cd to S molar ratio of 1/0.125. Photoluminescence studies showed that all CdS films we studied had a significant amount of sulfur vacancies and that those vacancy energy states were responsible for the high photoconductivity values. Both dark and photo sheet resistance values were lower when a higher NH3 volume or a lower TEA molarity solution was used. We report the effects of the concentration of a base (NH3) and a complexing agent (triehtylamine (TEA)) on the photoconductive characteristics and growth mechanism of CdS films synthesized by using the chemical bath deposition technique. Highly photoconductive CdS thin films were successfully grown on glass substrates at 80℃ under a sulfur-poor environment, i.e. a Cd to S molar ratio of 1/0.125. Photoluminescence studies showed that all CdS films we studied had a significant amount of sulfur vacancies and that those vacancy energy states were responsible for the high photoconductivity values. Both dark and photo sheet resistance values were lower when a higher NH3 volume or a lower TEA molarity solution was used.
Design and Fabrication of Spoof Surface Plasmon Transmission Line Operating at High Frequency
Huu Lam Phan,Thi Quynh Hoa Nguyen,Zabdiel Brito-Brito,Fermín Mira,Ignacio Llamas-Garro,Jung-Mu Kim 대한전자공학회 2024 Journal of semiconductor technology and science Vol.24 No.2
We report a high frequency transmission line (TL) based on spoof surface plasmon transmission. The proposed TL is designed with different shapes of bar, inverted trapezoid and trapezoid which arrange periodicity along the TL to achieve the higher field confinement and/or higher cut-off frequency. Compared with the bar-shaped TL, the TL using inverted trapezoid shape can enhance the field confinement, while the TL using trapezoid shape can be used to achieve higher cut-off frequencies up to 40 GHz. The simulation and measurement results indicate that the proposed TLs can operate with high efficiency from low frequencies up to above 28 GHz. Owing to outstanding merits such as low-cost, compact design, ease of fabrication, and good operating characteristics, the proposed TL using SSP transmission is sought to be adequate for millimeter- wave devices.
유기금속 화학기상증착법을 이용한 TiO<sub>2</sub> 나노선 제조
허훈회,웬티깅화,임재균,김길무,김의태,Heo, Hun-Hoe,Nguyen, Thi Quynh Hoa,Lim, Jae-Kyun,Kim, Gil-Moo,Kim, Eui-Tae 한국재료학회 2010 한국재료학회지 Vol.20 No.12
$TiO_2$ nanowires were self-catalytically synthesized on bare Si(100) substrates using metallorganic chemical vapor deposition. The nanowire formation was critically affected by growth temperature. The $TiO_2$ nanowires were grown at a high density on Si(100) at $510^{\circ}C$, which is near the complete decomposition temperature ($527^{\circ}C$) of the Ti precursor $(Ti(O-iPr)_2(dpm)_2)$. At $470^{\circ}C$, only very thin (< $0.1{\mu}m$) $TiO_2$ film was formed because the Ti precursor was not completely decomposed. When growth temperature was increased to $550^{\circ}C$ and $670^{\circ}C$, the nanowire formation was also significantly suppressed. A vaporsolid (V-S) growth mechanism excluding a liquid phase appeared to control the nanowire formation. The $TiO_2$ nanowire growth seemed to be activated by carbon, which was supplied by decomposition of the Ti precursor. The $TiO_2$ nanowire density was increased with increased growth pressure in the range of 1.2 to 10 torr. In addition, the nanowire formation was enhanced by using Au and Pt catalysts, which seem to act as catalysts for oxidation. The nanowires consisted of well-aligned ~20-30 nm size rutile and anatase nanocrystallines. This MOCVD synthesis technique is unique and efficient to self-catalytically grow $TiO_2$ nanowires, which hold significant promise for various photocatalysis and solar cell applications.