http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Thi Binh Nguyen Nguyen,Thi Kieu Diem Nguyen,Van Hue Trương,Thi Tuyet Ngoc Tran,van Bao Thang Phan,Thi Tuyen Nguyen,Hoang Bach Nguyen,Viet Quynh Tram Ngo,Van Tuan Mai,Paola Molicotti 질병관리본부 2023 Osong Public Health and Research Persptectives Vol.14 No.5
Objectives: Tuberculosis (TB) and drug-resistant TB (DR-TB) are national health burdens in Vietnam. In this study, we investigated the prevalence of rifampicin (RIF) and/or isoniazid (isonicotinic acid hydrazide, INH) resistance in patients with suspected TB, and applied appropriate techniques to help rapidly target DR-TB. Methods: In total, 1,547 clinical specimens were collected and cultured using the BACTEC MGIT system (Becton Dickinson and Co.). A resazurin microtiter assay (REMA) was used to determine the proportions of RIF and/or INH resistance. A real-time polymerase chain reaction panel with TaqMan probes was employed to identify the mutations of rpoB and katG associated with DR-TB in clinical isolates. Genotyping of the identified mutations was also performed. Results: A total of 468 Mycobacterium tuberculosis isolates were identified using the REMA. Of these isolates, 106 (22.6%) were found to be resistant to 1 or both antibiotics. Of the resistant isolates, 74 isolates (69.8%) were resistant to isoniazid (INH) only, while 1 isolate (0.94%) was resistant to RIF only. Notably, 31 isolates (29.24%) were resistant to both antibiotics. Of the 41 phenotypically INH-resistant isolates, 19 (46.3%) had the Ser315Thr mutation. There were 8 different rpoB mutations in 22 (68.8%) of the RIF-resistant isolates. The most frequently detected mutations were at codons 531 (37.5%), 526 (18.8%), and 516 (6.3%). Conclusion: To help prevent new cases of DR-TB in Vietnam, it is crucial to gain a comprehensive understanding of the genotypic DR-TB isolates.
Nguyen, Viet Tuyen,Nam, Dahyun,Gansukh, Mungunshagai,Park, Si-Nae,Sung, Shi-Joon,Kim, Dae-Hwan,Kang, Jin-Kyu,Sai, Cong Doanh,Tran, Thi Ha,Cheong, Hyeonsik Elsevier 2015 Solar energy materials and solar cells Vol.136 No.-
<P><B>Abstract</B></P> <P>Raman scattering and atomic force microscopy measurements on Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> thin films prepared by a direct solution method revealed that metal sulfates of various morphologies (dense clusters or separated particles) were partially embedded on the surface of the Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> layer. This residue was removed during the subsequent chemical bath deposition of the CdS buffer layer. However, the removal of the residue led to poor crystallinity and reduced photocurrent near the location of the residue, which suggests that controlling the formation of the sulfates during the fabrication of the absorber layer would be critical for obtaining high efficiency solar cells by the solution method.</P> <P><B>highlights</B></P> <P> <UL> <LI> We discovered sulfate residue on Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> prepared by the solution method. </LI> <LI> The chemical bath deposition (CBD) of CdS removes the residue but degrades the absorber layer. </LI> <LI> Photocurrent is reduced in regions where residues were removed during CBD. </LI> </UL> </P>
Pressure effects on EXAFS Debye-Waller factor and melting curve of solid krypton
Khac Hieu Ho,Viet Tuyen Nguyen,Nguyen Van Nghia,Nguyen Ba Duc,Vu Quang Tho,Tran Thi Hai,Doan Quoc Khoa 한국물리학회 2019 Current Applied Physics Vol.19 No.1
The pressure effects on atomic mean-square displacement, extended X-ray absorption fine structure (EXAFS) Debye-Waller factor and melting temperature of solid krypton have been investigated in within the statistical moment method scheme in quantum statistical mechanics. By assuming the interaction between atoms can be described by Buckingham potential, we performed the numerical calculations for krypton up to pressure 120 GPa. Our calculations show that the atomic mean-square displacement and EXAFS Debye-Waller factor of krypton crystal depend strongly on pressure. They make the robust reduction of the EXAFS peak height. Our results are in good and reasonable agreements with available experimental data. This approach gives us a relatively simple method for qualitatively calculating high-pressure thermo-physical properties of materials. Moreover, it can be used to verify future high-pressure experimental and theoretical works.