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Masoud Karimipour,Sara Mashhoun,Mohsen Mollaei,Mehdi Molaei,Nima Taghavinia 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.4
TiO2 nanotubes were synthesized using a modified autoclave-free thermal method from as-prepared initial powders. The size of initial powders (IP) was found to be critical in determining the morphology and crystal structure of the final product. Oleylamine (OA) was used as the polymer agent in the preparation of initial powders with different mol ratios of OA/Ti: 1, 5, and 10. X-ray diffraction analysis depicted that the increase of mole ratio up to 10 resulted in smaller nanoparticles with the sizes of about 8 nm. It was also deliberated that low temperature thermally treated IP showed the characteristic diffraction pattern of titanate phase of nanotubes. Scanning electron microscope images showed nanorods, short nanotubes, and single-phase long and uniform nanofibers produced from initial powders. SEM cross-section of the anode cell of TiO2 nanofibers demonstrated the presence of uniformly closed net long fibers in the cell. Open circuit voltage measurements of the nanofiber cell demonstrated a several hundreds of seconds in the electron transport decay, which was significantly higher than that of the nanoparticles. IMPS/IMVS measurements of the nanofibers and nanotube solar cells showed electron transport enhancement and long life time compared to their nanoparticle counterparts.
Human parvovirus B19 and parvovirus 4 among Iranian patients with hemophilia
Davod Javanmard,Masood Ziaee,Hadi Ghaffari,Mohammad Hasan Namaei,Ahmad Tavakoli,Hamidreza Mollaei,Mohsen Moghoofei,Helya Sadat Mortazavi,Seyed Hamidreza Monavari 대한혈액학회 2017 Blood Research Vol.51 No.4
Background: Human parvovirus B19 (B19V) is one of the smallest DNA viruses and shows great resist-ance to most disinfectants. Therefore, it is one of the common contaminant pathogens present in blood and plasma products. Parvovirus 4 (PARV4) is a newly identified parvovi-rus, which is also prevalent in parenteral transmission. In this study, we aimed to evaluate the prevalence of B19V and PARV4 DNA among patients with hemophilia in Birjand County in eastern Iran. Methods: This was a cross-sectional epidemiological study comprising nearly all people with hemo-philia in this region. Whole blood samples were taken after patient registration and sent for plasma isolation. After nucleic acid extraction, B19V was detected with real-time poly-merase chain reaction, PARV4 DNA was then detected using sensitive semi-nested PCR. Results: In total, there were 86 patients with hemophilia, with mean age 28.5±1.5 years. Of these, 90.7% were men and 9.3% women; 84.9% had hemophilia A and 7.0% had hemophilia B. We found 11 patients (12.8%) were positive for B19V DNA and 8 were positive (9.3%) for PARV4 DNA. The prevalence of B19V was higher in middle-aged groups rather than younger people, whereas PARV4 infection was more common in younger patients (P<0.05). Conclusion: There was a high prevalence of B19V and PARV4 infection in this high-risk group of pa-tients with hemophilia. Due to the clinical significance of the B19 virus, imposing more precautionary measures for serum and blood products is recommended.
Human parvovirus B19 and parvovirus 4 among Iranian patients with hemophilia
Davod Javanmard,Masood Ziaee,Hadi Ghaffari,Mohammad Hasan Namaei,Ahmad Tavakoli,Hamidreza Mollaei,Mohsen Moghoofei,Helya Sadat Mortazavi,Seyed Hamidreza Monavari 대한혈액학회 2017 Blood Research Vol.52 No.4
Background: Human parvovirus B19 (B19V) is one of the smallest DNA viruses and shows great resist-ance to most disinfectants. Therefore, it is one of the common contaminant pathogens present in blood and plasma products. Parvovirus 4 (PARV4) is a newly identified parvovi-rus, which is also prevalent in parenteral transmission. In this study, we aimed to evaluate the prevalence of B19V and PARV4 DNA among patients with hemophilia in Birjand County in eastern Iran. Methods: This was a cross-sectional epidemiological study comprising nearly all people with hemo-philia in this region. Whole blood samples were taken after patient registration and sent for plasma isolation. After nucleic acid extraction, B19V was detected with real-time poly-merase chain reaction, PARV4 DNA was then detected using sensitive semi-nested PCR. Results: In total, there were 86 patients with hemophilia, with mean age 28.5±1.5 years. Of these, 90.7% were men and 9.3% women; 84.9% had hemophilia A and 7.0% had hemophilia B. We found 11 patients (12.8%) were positive for B19V DNA and 8 were positive (9.3%) for PARV4 DNA. The prevalence of B19V was higher in middle-aged groups rather than younger people, whereas PARV4 infection was more common in younger patients (P<0.05). Conclusion: There was a high prevalence of B19V and PARV4 infection in this high-risk group of pa-tients with hemophilia. Due to the clinical significance of the B19 virus, imposing more precautionary measures for serum and blood products is recommended.