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Kroon, Eugè,ne,Pham, Phuc T.,Sirivichayakul, Sunee,Trichavaroj, Rapee,Colby, Donn J.,Pinyakorn, Suteeraporn,Phanuphak, Nittaya,Sanders-Buell, Eric,van Griensven, Frits,Kijak, Gustavo H.,Kim, Jer Wolters Kluwer Health, Inc. 2018 AIDS Vol.32 No.16
OBJECTIVE:: To assess transmission characteristics in a predominantly MSM cohort initiating antiretroviral therapy (ART) immediately following diagnosis of acute HIV-1infection (AHI). METHODS:: A longitudinal study (2009–2017) was performed in participants with AHI (n = 439) attending a single clinic in Bangkok. Plasma samples obtained prior to ART were used to obtain HIV-1 pol sequences and combined with clinical and epidemiologic data to assess transmission dynamics (cluster formation and size) using phylogenetic analysis. Clusters were estimated using maximum likelihood, genetic distance of 1.5% and visual inspection. The potential transmitter(s) in a cluster was determined using time to viral suppression and interview data. RESULTS:: The cohort was predominantly MSM (93%) and infected with HIV-1 CRF01_AE (87%). Medians (ranges) for age and viral load prior to ART were 26 (18–70) years and 5.9 (2.5–8.2) log10 HIV-1 RNA copies/ml. Median time from history of HIV-1 exposure to diagnosis was 19 (3–61) days. Viral suppression was observed in 388 of 412 (94%) participants at a median time of 12 weeks following ART. Twenty-six clusters with median cluster size of 2 (2–5) representing 62 of 439 (14%) participants were observed. Younger age was associated with cluster formation: median 28 versus 30 years for unique infections (P = 0.01). A potential transmitter was identified in 11 of 26 (42%) clusters. CONCLUSION:: Despite high rates of viral suppression following diagnosis and treatment of AHI within a cohort of young Thai MSM, HIV-1 transmission continued, reflecting the need to expand awareness and treatment access to the entire MSM population.
EQCM studies of the effect of sulfamic acid on the formation Cu-Se compounds
Dang Thi Bich Hop,Pham Hong Quang,Duc H. Tran,Do Thi Kim Anh,Do Phuc Quan,Ngo Dinh Sang,W. B. K. Putri 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.1
A combination of Cyclic Voltammetry (CV) and Electrochemical Quartz Crystal Microbalance (EQCM) has been used to study the effect of sulfamic acid as a complexing agent on the formation of Cu-Se compounds. The values of the equivalent atomic mass (M/z) grown at the gold EQCM sensor during electrodeposition at varying potentials and constant potentials were analyzed to understand the mechanism of the growing process. It was found that sulfamic acid does not affect so much the deposition of Cu in the absence of Se. However, when Cu and Se are present simultaneously, sulfamic acid causes and facilitates the formation of Cu-Se compounds. Furthermore, at a high concentration, sulfamic acid causes a mass-loss process, leading to a change of composition. A suitable concentration of sulfamic acid can be concerned from these studies.
Khang X. Nguyen,Phuc H. Pham,An C.D. Nguyen,Chuc T. Nguyen,Tung T. Nguyen,Phong D. Tran,Nam T.S. Phan 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.92 No.-
A Fe-Mo-Se nanopowder, synthesized by a solvothermal protocol, was utilized as a heterogeneouscatalyst for the synthesis of 2-arylquinazolines from DL-α-phenylglycine-based α-amino acids and2-nitrobenzyl alcohols via domino transformations. High yields and selectivity were achieved undersolvent-free conditions. The Fe-Mo-Se catalyst offered considerably higher activity than numeroushomogeneous and heterogeneous catalysts. To our best knowledge, this domino reaction is new, and theutilization of iron-molybdenum selenide catalyst in the synthesis of quinazolines was not previouslyreported.