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Le, Van Phan,Nguyen, Tung,Park, Jong-Hyeon,Kim, Su-Mi,Ko, Young-Joon,Lee, Hyang-Sim,Nguyen, Van Cam,Mai, Thuy Duong,Do, Thi Hoa,Cho, In-Soo,Lee, Kwang-Nyeong Elsevier 2010 Veterinary microbiology Vol.145 No.3
<P><B>Abstract</B></P><P>Six field foot-and-mouth disease viruses (FMDVs), including four serotype O and two serotype Asia 1 strains, were collected from endemic outbreaks in 2005, 2006, and 2007 from four different provinces in Vietnam. The viruses were isolated and genetically characterized for their complete genomic sequences. The genetic analysis based on the complete genomic coding sequences revealed that the four serotype O FMDVs were related to each other, sharing 95.2% nucleotide (nt) identity and 97.5–97.6% amino acid (aa) identity. Genetic analysis and a phylogenetic tree, based on the VP1 gene of FMDV, showed that the four present Vietnamese serotype O strains have a high level of identity with other serotype O representatives of the Mya-98 lineage of the Southeast Asian (SEA) topotype. The four viruses were all clustered into the Mya-98 lineage of the SEA topotype, sharing 92.3–95.6% nt and 93.4–96.7% aa identity. This finding of the Mya-98 lineage was different from previous reports that the Vietnamese serotype O strains belonged to the Cam-94 lineage of the SEA topotype and two other topotypes, Middle East-South Asia (ME-SA) and Cathay. For the two serotype Asia 1 FMDVs, the genetic analysis based on the complete genomic coding sequences as well as on the VP1 gene revealed that they belonged to two genogroups, IV and V. Of note, the As1/VN/QT03/2007 strain of genogroup V, isolated in 2007, was very closely related to the pandemic Asia 1 strain which caused FMD outbreaks in China (Asia1/WHN/CHA/06, FJ906802) and Mongolia (Asia1/MOG/05, EF614458) in 2005, sharing 99.0–99.3% nt and 99.5–100% aa identity. In contrast, the second strain As1/VN/LC04/2005 of genogroup IV, isolated in 2005, was closely related to all referenced Vietnamese serotype Asia 1 strains found in the GenBank databases, sharing 86.4–100% nt and 90.9–100% aa identity with each. This study is the first description of the full-length genomic sequence of Vietnamese FMDV serotypes O and Asia 1 and may provide the evidence of the concurrent circulation of different serotypes and subtypes of FMDV in recent years in Vietnam.</P>
( Le Thi Cam Van ),( Maiduyhien ),유효종 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Rationally grafting unique functional groups at specific sites at molecular level offers access to a variety of the chemical and physical properties of the resultant metallosupramolecules. Herein, we report a strategy to achieve a new type of amine-functionalized cobalt (Co) triple-stranded helicate (NH<sub>2</sub>-CoTSH), Co<sub>8</sub>(PDA)<sub>6</sub>(AIP)<sub>3</sub>(DMF)<sub>2</sub>(H2O)<sub>4</sub> (1) (PDA = 2,6-pyridinedicarboxylate, AIP = 5-aminoisophthalic acid, DMF = dimethylformamide). In addition, considering the formation of higher-order assembly structures with 1 as supramolecular modules is strongly governed by the ability of deprotonated carboxylate groups on 1 to coordinate to extra cobalt ions. On this basis, a higher-order assembly polymeric structure, [Co<sub>8</sub>(PDA)<sub>6</sub>(AIP)<sub>3</sub>(DMF)<sub>6</sub>] . [Co(H<sub>2</sub>O)<sub>3</sub>])n (2), can be obtained. Moreover, the use of different transition metals (Ni<sup>2+</sup>) in the place of Co<sup>2+</sup> also leads to the isomorphous supramolecule, Ni<sub>8</sub>(PDA)<sub>6</sub>(AIP)<sub>3</sub>(DMF)<sub>6</sub> (3), which is structurally similar to that of 1.
Van Cam Thi Le,강은실,윤소영,Mahshab Sheraz,Ly Ngoc Huyen,김승도 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
This paper aims to offer an insight into the potential application of a multi-purpose filter to remove fine particulates and disinfect pathogens using melamine sponge with a copper-organic framework. In-situ growth dip coating method was applied to coat Cu-based coordination polymer particle (Cu-CPP) on melamine sponge (MS). The integration of Cu-CPPs with high crystallinity and highly active surface area (1318.1 m²/g) enabled Cu-CPP/MS to have an excellent capture rate (99.66%) and an instant disinfection rate of 99.54% for Escherichia coli. Electrostatic attraction seemed to play a crucial role in capturing negative-charged pathogens effectively by positive charges on Cu-CPP arising from unbalanced copper ions in Cu-CPP. Disinfection of pathogens was mainly attributed to catalytically active Cu<SUP>2+</SUP> sites. Organic ligand played an important role in bridging and maintaining Cu<SUP>2+</SUP> ions within the framework. This study highlights the design of a new capture-and-disinfection (CDS) air filter system for pathogens using Cu-CPP/MS.
Van Cam Thi Le,Tuu Nguyen Thanh,강은실,윤소영,Hien Duy Mai,Mahshab Sheraz,한태욱,안진주,김승도 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
COVID-19 has drawn great attention on the necessity for establishing pathogen-free indoor air. This paperoffers an insight into the potential application of a multi-purpose filter to remove fine particulates and disinfect pathogensusing melamine sponge with a copper-organic framework. In-situ growth dip coating method was applied to coatCu-based coordination polymer particle (Cu-CPP) on melamine sponge (MS). The integration of Cu-CPPs with highcrystallinity and highly active surface area (1,318.1m2/g) enabled Cu-CPP/MS to have an excellent capture rate (99.66%)and an instant disinfection rate of 99.54% for Escherichia coli. Electrostatic attraction seemed to play a crucial role incapturing negative-charged pathogens effectively by positive charges on Cu-CPP arising from unbalanced copper ionsin Cu-CPP. Disinfection of pathogens was mainly attributed to catalytically active Cu2+ sites. Organic ligand played animportant role in bridging and maintaining Cu2+ ions within the framework. This study highlights the design of a newcapture-and-disinfection (CDS) air filter system for pathogens using Cu-CPP/MS. It can be applied as a substitute forconventional high-efficiency particulate air (HEPA) filters.
Van Cam Thi Le,윤소영,강은실,김승도 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
Air transmission of pathogens in droplets exhaled by infected human and inhaled by healthy individuals if they spend time in shared indoor spaces. Therefore, it is necessary to create a bactericidal-bacteriostatic copper nanoparticles decorated melamine sponge (Cu/MS) composite air filter using anti-pathogen copper nanoparticles agents coupled melamine sponge (MS) substrate to capture and inactivate aerosol containing E. coli in air phase. Copper nanoparticles agents used in this experiment is competitive and has a sterilizing effect. The sterilization effect of Cu/MS composite air filter is attributed to copper nanoparticles due to its small size, the large surface-to-volume ratio, and its chemically adhere to the substrate. When E. coli suspension is sprayed at the flow rate 3 L/min using an atomizer and passed through the sponge filters, the Cu/MS hybrid filter exhibits excellent capture efficiency (100%) and noticeable inactivation efficiency (100%). This study might provide a spotlight on designing new air filter system for pathogen capture and inactivation in air.
Van Cam Thi Le,Mahshab Sheraz,강은실,윤소영,Muhammad Awais,김승도 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
This paper introduces a multifunctional air filter with a strong ability to trap and disinfect pathogens and absorb particulate matter (PM), volatile organic compound (VOC), and CO₂. This study demonstrates a facile and ecofriendly synthesis of copper coordination polymer particle (Cu-CPP)-decorated nonwoven fiber filters (Cu-CPP/NWF) via an in situ growth dip-coating method. Their multifunction potentials in air pollution treatment are also assessed. Specifically, Cu-CPP/NWF showed a remarkable performance for air treatment, with 100% disinfection efficiency against airborne bacteria in 45 min, 99.99% PM removal efficiency, 100% p-xylene VOC adsorption efficiency, and high potential CO₂ uptake capacities (19.81 cm³/g). Cu-CPP can work as an antibacterial agent and an adsorbent component, thus offering a wide range of applications. This study provides valuable insight to the development of a multifunctional air filter proven to be a life-saving product for public health protection, especially during the SARS-CoV-2 pandemic.
Van Tran, Thuan,Nguyen, Duyen Thi Cam,Le, Hanh T.N.,Bach, Long Giang,Vo, Dai-Viet N.,Dao, To-Uyen T.,Lim, Kwon Taek,Nguyen, Trinh Duy Elsevier 2019 Journal of environmental chemical engineering Vol.7 No.5
<P><B>Abstract</B></P> <P>Discharge of nonsteroidal anti-inflammatory drugs (NSAIDs) from wastewater has been increasingly alarmed, led to the advent of the treatment techniques. Among these methods, adsorption is regarded as a tunable and green approach with the utilization of mesoporous carbon (MC) as an efficient and recyclable adsorbent. Herein, we described the strategy for the synthesis of novel MC from Fe-MIL-88B as a self-sacrificial template. Three thermolysis temperatures (550, 750, and 950 °C) were investigated to compare the structural characteristics and absorbability towards selected NSAIDs compounds including diclofenac sodium (DCF), aspirin (APR), and ibuprofen (IBU). Effect of contact time (0–480 min), concentration (10–40 mg/L), pH (2–10), and MC dosage (0.1–0.5 g/L) was systematically studied. Kinetic and isotherm models were also used to find out the adsorption mechanism and behavior of NSAIDs pharmaceutical over MC materials. Proposed mechanism and recyclability test were rigorously studied to gain more insight into how the NSAIDs molecules adsorb on the MC materials and their potential towards drug treatment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effect of thermolysis temperature on characteristics and absorbability towards anti-inflammatory drugs was conducted. </LI> <LI> Kinetic, isotherm, and recyclability experiments were systematically studied. </LI> <LI> Adsorption mechanisms including H-bond, π–π interaction, metal–oxygen bridging, and electrostatic attraction were rigorously proposed. </LI> <LI> Outstanding adsorption capacity (∼144 mg/g), and excellent reusability were monitored with Fe-MIL-88B-derived mesoporous carbon. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>