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  • 1
    Online Resource
    Online Resource
    Analysis of Polycyclic Aromatic Hydrocarbon in Airborne Particulate Matter Samples by Gas Chromatography in Combination with Tandem Mass Spectrometry (GC-MS/MS)
    Hindawi Limited ; 2021
    In:  Journal of Analytical Methods in Chemistry Vol. 2021 ( 2021-5-26), p. 1-10
    Details
    In: Journal of Analytical Methods in Chemistry, Hindawi Limited, Vol. 2021 ( 2021-5-26), p. 1-10
    Abstract: Polycyclic aromatic hydrocarbons (PAHs), the family of organic contaminations, have been shown to have negative effects on human health. However, until now, the comprehension on occurrence, distribution, and risk assessment of human exposure to PAHs has been limited in Vietnam. In this work, a capillary gas chromatography coupled with electron impact ionization tandem mass spectrometry (GC-EI-MS/MS) has been introduced for analysis of 16 PAHs in some particulate matter samples. PAHs have been separated on the TG 5 ms capillary gas chromatographic column and detected by tandem mass spectrometry in multiple reaction monitoring mode. The PAHs in the particulate matter (PM 2.5 and PM 10) samples were extracted by ultrasonic-assisted liquid extraction and cleaned up by an acidic silica gel solid phase extraction. The linearity range of all analyzed PAHs was from 5 to 2000 ng mL−1 with R2 ≥0.9990. Limit of detection (LOD) of PAHs in particulate matter sample was from 0.001 ng m−3 (Br-Naph) to 0.276 ng m−3 (Fln). The recovery of PAHs was investigated by international proficiency testing samples. The recoveries of PAHs in proficiency testing sample ranged from 79.3% (Chr) to 109.8% (IcdP). The in-house validated GC-EI-MS/MS method was then applied to analysis of some particulate matter samples that were collected in the Hanoi areas. The total concentrations of PAHs in several brands of samples collected from Hanoi were found in the range of 226.3 ng m−3–706.43 ng m−3. Among the studied compounds, naphthalene was found at high frequency and ranged from 106.5 ng m−3 to 631.1 ng m−3. The main distribution of the PAHs in particulate matter samples was two-ring and three-ring compounds.
    Type of Medium: Online Resource
    ISSN: 2090-8873 , 2090-8865
    URL: Article
    DOI: 10.1155/2021/6641326
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
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  • 2
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    Multiresidue Pesticides Analysis of Vegetables in Vietnam by Ultrahigh-Performance Liquid Chromatography in Combination with High-Resolution Mass Spectrometry (UPLC-Orbitrap MS)
    Hindawi Limited ; 2019
    In:  Journal of Analytical Methods in Chemistry Vol. 2019 ( 2019-05-08), p. 1-12
    Details
    In: Journal of Analytical Methods in Chemistry, Hindawi Limited, Vol. 2019 ( 2019-05-08), p. 1-12
    Abstract: An ultrahigh-performance liquid chromatography in combination with high-resolution mass spectrometry Thermo Q-Extractive Focus Orbitrap MS has been introduced for analysis of multiclass pesticides in vegetable samples collected in Hanoi, Vietnam. Multiclass pesticides were separated on the Thermo Hypersil Gold PFP column utilizing a gradient of the mobile phase consisting of 5 mM ammonium formate, 0.1% formic acid in deionized water, and methanol. The target analytes were detected in the full-scan mode on Thermo Scientific Q-Exactive Focus Orbitrap MS for quantitation at the optimum operating conditions. These conditions included, but not limit to, the resolution of 70000 at the full width at half maximum in both positive and negative mode, mass range from 80 to 1000  m/z , and optimized parameters for the heated electrospray ionization source. The identification of the analytes in real samples was based on retention times, mass to charge ratios, mass accuracies, and MS/MS spectra at the confirmation mode with the inclusion list of target analytes. The mass accuracies of target analytes were from −4.14 ppm (dinotefuran) to 1.42 ppm (cinosulfuron) in the neat solvent and from −3.91 ppm (spinosad D) to 1.29 ppm (cinosulfuron) in the matrix-matched solution. Target analytes in the vegetable-based matrix were extracted by the QuEChERS method. Some critical parameters of the analytical method such as linearity, repeatability, limit of detection, and limit of quantitation have been evaluated and implemented. Excellent LOD and LOQ of the developed method were achieved at the range of 0.04–0.85 and 0.13–2.9  μ g·kg −1 , respectively. Intraday and interday repeatability of the analytical signal (peak area, n = 6 ) of the developed method were below 3% and 10%, correspondingly. The matrix effect, extraction recovery, and overall recovery were fully investigated by spiking experiments. Experimental results demonstrated that the ionization suppression or enhancement was the main contribution on the overall recoveries of target analytes. Finally, the in-house validated method was applied to pesticides screening in vegetables samples in local villages in Hanoi, Vietnam. The concentrations of all target analytes were below limit of quantitation and lower than US-FDA or EU maximum residue levels.
    Type of Medium: Online Resource
    ISSN: 2090-8865 , 2090-8873
    URL: Article
    DOI: 10.1155/2019/3489634
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2019
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  • 3
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    Determination of Pharmaceutical Residues by UPLC-MS/MS Method: Validation and Application on Surface Water and Hospital Wastewater
    Hindawi Limited ; 2021
    In:  Journal of Analytical Methods in Chemistry Vol. 2021 ( 2021-1-8), p. 1-12
    Details
    In: Journal of Analytical Methods in Chemistry, Hindawi Limited, Vol. 2021 ( 2021-1-8), p. 1-12
    Abstract: In this study, an analytical method for the simultaneous determination of 7 major pharmaceutical residues in Vietnam, namely, carbamazepine, ciprofloxacin, ofloxacin, ketoprofen, paracetamol, sulfamethoxazole, and trimethoprim, in surface water and hospital wastewater has been developed. The method includes enrichment and clean-up steps by solid phase extraction using mix-mode cation exchange, followed by identification and quantification using an ultrahigh-performance liquid chromatography and tandem mass spectrometry and employing electrospray ionization (UPLC-ESI-MS/MS). Seven target compounds were separated on the reversed phase column and detected in multiple reaction monitoring (MRM) mode within 6 minutes. The present study also optimized the operating parameters of the mass spectrometer to achieve the highest analytical signals for all target compounds. All characteristic parameters of the analytical method were investigated, including linearity range, limit of detection, limit of quantification, precision, and accuracy. The important parameter in UPLC-ESI-MS/MS, matrix effect, was assessed and implemented via preextraction and postextraction spiking experiments. The overall recoveries of all target compounds were in the ranges from 55% to 109% and 56 % to 115% for surface water and hospital wastewater, respectively. Detection limits for surface water and hospital wastewater were 0.005–0.015 µg L−1 and 0.014–0.123 µg L−1, respectively. The sensitivity of the developed method was allowed for determination of target compounds at trace level in environmental water samples. The in-house validation of the developed method was performed by spiking experiment in both the surface water and hospital wastewater matrix. The method was then applied to analyze several surface water and hospital wastewater samples taken from West Lake and some hospitals in Vietnam, where the level of these pharmaceutical product residues was still missed. Sulfamethoxazole was present at a high detection frequency in both surface water (33% of analyzed samples) and hospital wastewater (81% of analyzed samples) samples.
    Type of Medium: Online Resource
    ISSN: 2090-8873 , 2090-8865
    URL: Article
    DOI: 10.1155/2021/6628285
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
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  • 4
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    The optimal protocol for analysis of single nucleotide polymorphism rs320 on Lipoprotein Lipase gene of Vietnamese populations
    Journal of Science, Hanoi National University of Education ; 2020
    In:  Journal of Science Natural Science Vol. 65, No. 3 ( 2020-3), p. 123-129
    Details
    In: Journal of Science Natural Science, Journal of Science, Hanoi National University of Education, Vol. 65, No. 3 ( 2020-3), p. 123-129
    Type of Medium: Online Resource
    ISSN: 2354-1059
    Uniform Title: TỐI ƯU QUY TRÌNH PHÂN TÍCH ĐA HÌNH ĐƠN NUCLEOTID RS320 THUỘC GEN LIPOPROTEIN LIPASE Ở NGƯỜI VIỆT NAM
    URL: Journal
    URL: Article
    DOI: 10.18173/2354-1059
    DOI: 10.18173/2354-1059.2020-0015
    Language: Unknown
    Publisher: Journal of Science, Hanoi National University of Education
    Publication Date: 2020
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  • 5
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    Concentration, variation, and correlation with traffic vehicle volume of the pollutants - polycyclic aromatic hydrocarbons (PAHs) in street dust in Hanoi
    Ministry of Science and Technology, Vietnam (VMOST) ; 2022
    In:  Ministry of Science and Technology, Vietnam Vol. 64, No. 6 ( 2022-6-25), p. 40-44
    Details
    In: Ministry of Science and Technology, Vietnam, Ministry of Science and Technology, Vietnam (VMOST), Vol. 64, No. 6 ( 2022-6-25), p. 40-44
    Abstract: The average concentration of 16 PAHs in street dust in Hanoi (n=27) was 1,226 ng/g, ranging from 532 to 2,276 ng/g. The total toxic equivalent amount of 16 PAHs, in comparison with BaP, TEQBaP was 121.58 ng/g on average and varried in a range of 35.36 and 322.22 ng/g. Amongst 16 analysed PAHs, the most abundant compounds were Pyr (16.4%) 〉 BbF (14.0%)~Fluth (14.0%) 〉 BghiP (12.3%) 〉 Phe (7.9%). However, BaP occupied up to 52.6% of the toxic equivalent amount, followed by DahA (15.9%) and BkF (14.2%). In Hanoi street dust, the ratios of some special PAHs such as Fluth/Fluth+Pyr (0.46±0.04); BaA/Chr in a range of 0.27-0.49 (occupied 60% of the dust sample amount), and IcdP/BghiP (0.40±0.11), showed that the main emission source of PAHs in Hanoi road dust was from traffic vehicles using gasoline. The PAHs concentrations in street dust in Hanoi tended to be reduced up to approximately 10% in the observation for a few recent years despite the increasing traffic vehicle volume of the city. That means the better traffic vehicles and road management in Hanoi, the lesser emission of toxic organic pollutants, especially PAHs, to the ambient air.
    Type of Medium: Online Resource
    ISSN: 1859-4794
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.31276/VJST.64(6)
    DOI: 10.31276/VJST.vol(number).page
    DOI: 10.31276/VJST.64(6).40-44
    Language: Unknown
    Publisher: Ministry of Science and Technology, Vietnam (VMOST)
    Publication Date: 2022
    SSG: 6,25
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  • 6
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    Occurrence, Distribution, and Ecological Risk Assessment of Antibiotics in Selected Urban Lakes of Hanoi, Vietnam
    Hindawi Limited ; 2021
    In:  Journal of Analytical Methods in Chemistry Vol. 2021 ( 2021-3-10), p. 1-13
    Details
    In: Journal of Analytical Methods in Chemistry, Hindawi Limited, Vol. 2021 ( 2021-3-10), p. 1-13
    Abstract: Residue concentrations of fifteen antibiotics including sulfonamides, quinolones, macrolides, β-lactams, and trimethoprim in lakes from Hanoi metropolitan area, Vietnam, were analyzed using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC/MS-MS) to elucidate their occurrence and behavior in urban environment. For surface water, the average concentrations of five antibiotic classes decreased in the order: sulfonamides (117.9 ng/L)  〉  β-lactams (31.28 ng/L)  〉  quinolones (20.19 ng/L)  〉  macrolides (17.74 ng/L)  〉  trimethoprim (8.93 ng/L). While the highest concentration of SMX was detected at 806.5 ng/L in surface water, those obtained in sediment were only at 1.35 ng/g because of their high solubility in water. Quinolones were found at a maximal concentration of 158.7 ng/L for OFL in water phase whereas those in sediment phase were 4,017 ng/g due to their great affinity in sediment. These findings revealed the different fate and release mechanisms of each antibiotic group in the environment. The ecological risk assessment implied some targeted compounds, and in particular, OFL and AZM could pose high risks to algae in the aquatic ecosystem.
    Type of Medium: Online Resource
    ISSN: 2090-8873 , 2090-8865
    URL: Article
    DOI: 10.1155/2021/6631797
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
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  • 7
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    Determination of Per- and Polyfluoroalkyl Substances in Craft Villages and Industrial Environments of Vietnam
    Hindawi Limited ; 2021
    In:  Journal of Analytical Methods in Chemistry Vol. 2021 ( 2021-4-21), p. 1-9
    Details
    In: Journal of Analytical Methods in Chemistry, Hindawi Limited, Vol. 2021 ( 2021-4-21), p. 1-9
    Abstract: Per- and polyfluoroalkyl substances (PFASs) have attracted great concern because of their great recalcitrant nature and harmful environmental health effects. Eight PFASs in wastewater from craft villages and industrial environments of Vietnam were analyzed using liquid chromatography triple quadrupole mass spectrometry (LC-MS/MS) with negative electrospray ionization interface. For analysis of PFASs, percent recoveries ranged from 87 to 112, and MQL varied from 0.19 ng/L to 0.49 ng/L. Treated wastewater samples from eight metal-plating and eight textile-dyeing factories were collected for analysis of PFASs. Concentrations of PFOS in wastewater samples obtained from metal-plating factories with decorative plating stage were found at a range of 0.73–18.91 ng/L. For textile-dyeing factories, PFOA and/or PFHxA, which were present in all effluent wastewater samples, varied from 0.37 to 15.96 ng/L and 1.07 to 43.58 ng/L, respectively. Sixty surface water samples in four locations of the textile dyeing craft villages, a recycling plastic village, a paper recycling village, and 10 river water samples in the control area (a rural area without specific waste sources) were collected and analyzed for PFASs. The total concentrations of eight PFASs in surface water samples of craft villages ranged from 0.83 to 58.2 ng/L, which were significantly higher than those in the control area. PFOA, PFHxA, and PFOS are the three most dominant congeners in wastewater taken from craft villages with the highest concentrations of 27.4, 23.8, and 7.36 ng/L, respectively. The environmental risks posed by PFASs in surface water from craft villages were mainly in a range of extremely low to low level, particularly a few points have high ecological risks of PFDoA.
    Type of Medium: Online Resource
    ISSN: 2090-8873 , 2090-8865
    URL: Article
    DOI: 10.1155/2021/5564994
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2021
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  • 8
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    Clinical case report - The first successful simultaneous heart and kidney transplantation in Vietnam
    The Vietnam Journal of Cardiovascular and Thoracic Surgery ; 2023
    In:  Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam Vol. 41 ( 2023-04-17), p. 23-28
    Details
    In: Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam, The Vietnam Journal of Cardiovascular and Thoracic Surgery, Vol. 41 ( 2023-04-17), p. 23-28
    Abstract: Abstract: Simultaneous heart and kidney transplantation is quite a popular type of multiorgan transplant in the world, considered an optimum treatment for end stage cardiorenal syndrome. This report presents first successful simultaneous heart-kidney transplant in Vietnam. A 37-year-old male patient with 10 years of chronic disease: end-stage heart failure due to dilated cardiomyopathy with 15-25% of left ventricular systolic function, and renal failure due to IgA nephropathy completely depended on dialysis. The patient underwent a simultaneous heart-kidney transplant from a brain-dead multiorgan donor on February 15, 2023 at Viet Duc University hospital. He had quick recovery of all cardiac and renal functions on 5 days afters transplant. This is the 2nd successful case of multiorgan transplant at Viet Duc hospital, but the first heart-kidney transplantation.
    Type of Medium: Online Resource
    ISSN: 0866-7551
    URL: Article
    DOI: 10.47972/vjcts.v41i.862
    Language: Unknown
    Publisher: The Vietnam Journal of Cardiovascular and Thoracic Surgery
    Publication Date: 2023
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  • 9
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    Kết quả sự hài lòng của người bệnh điều trị nội trú tại Bệnh viện Y dược cổ truyền & phục hồi chfíc năng tỉnh Phú Thọ năm 2021
    Viet Nam University of Traditional Medicine ; 2022
    In:  Viet Nam Journal of Traditional Medicine and Pharmacy Vol. 45, No. 4 ( 2022-06-15), p. 24-30
    Details
    In: Viet Nam Journal of Traditional Medicine and Pharmacy, Viet Nam University of Traditional Medicine, Vol. 45, No. 4 ( 2022-06-15), p. 24-30
    Abstract: Mục tiêu: Đánh giá sự hài lòng của người bệnh điều trị nội trú tại Bệnh viện Y dược cổ truyền và Phục hồi chức năng tỉnh Phú Thọ năm 2021 Đối tượng và phương pháp nghiên cứu: nghiên cứu mô tả cắt ngang ở 313 người bệnh ≥ 18 tuổi bằng phiếu khảo sát và đánh giá bằng bộ thang đo Likert với 5 mức độ theo bộ câu hỏi để đánh giá sự hài lòng của người bệnh dựa trên Bộ tiêu chí đánh giá chất lượng bệnh viện Việt Nam (phiên bản 2.0) Kết quả: Tỷ lệ hài lòng chung của người bệnh điều trị nội trú chiếm 99,11%, trong đó 68,27% cảm thấy rất hài lòng và 30,84% hài lòng. Tỷ lệ người bệnh hài lòng với: Khả năng tiếp cận đạt 99,23%; Sự minh bạch thông tin và thủ tục khám bệnh, điều trị đạt 99,36%; Cơ sở vật chất và phương tiện phục vụ người bệnh đạt 98,79%; Thái độ ứng xử, năng lực chuyên môn của NVYT đạt từ 99,04% đến 99,36%; Kết quả cung cấp dịch vụ đạt 99,04%.
    Type of Medium: Online Resource
    ISSN: 2354-1334
    URL: Issue
    URL: Article
    DOI: 10.60117/vjmap.v45i4
    DOI: 10.60117/vjmap.v45i4.69
    Language: Unknown
    Publisher: Viet Nam University of Traditional Medicine
    Publication Date: 2022
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  • 10
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    KIẾN THỨC, THÁI ĐỘ, THỰC HÀNH CHĂM SÓC SỨC KHỎE RĂNG MIỆNG CỦA HỌC SINH TRƯỜNG TRUNG HỌC CƠ SỞ AN HÒA, TỈNH BÌNH ĐỊNH NĂM 2019
    Vietnam Medical Journal, Vietnam Medical Association ; 2023
    In:  Tạp chí Y học Việt Nam Vol. 521, No. 1 ( 2023-02-13)
    Details
    In: Tạp chí Y học Việt Nam, Vietnam Medical Journal, Vietnam Medical Association, Vol. 521, No. 1 ( 2023-02-13)
    Abstract: Mục tiêu: Đánh giá kiến thức, thái độ, thực hành chăm sóc răng miệng của học sinh tại Trường Trung học cơ sở An Hòa, thị xã An Lão, tỉnh Bình Định. Đối tượng và phương pháp: Nghiên cứu mô tả cắt ngang trên 550 học sinh tại Trường Trung học cơ sở An Hòa vào tháng 11 năm 2019. Thu thập dữ liệu bằng cách phỏng vấn gián tiếp thông qua bộ câu hỏi được xây dựng. Kết quả: Có 550 học sinh tham gia nghiên cứu, trong đó có 243 học sinh là nam (44,2%). Có 68,9% học sinh có kiến thức tốt về chăm sóc răng miệng, 69,5% học sinh có thái độ tốt và 23,6% học sinh có thực hành tốt về chăm sóc răng miệng. Có mối liên hệ giữa kiến thức, thái độ, thực hành CSSKRM theo giới và lớp: So với học sinh khối lớp 6, khối lớp 7 có thực hành CSSKRM tốt bằng 0,59 lần (95%CI: 0,36 – 0,99), học sinh khối lớp 8 bằng 0,52 lần (95%CI: 0,31 – 0,87) và học sinh khối lớp 9 chỉ bằng 0,47 lần (95%CI: 0,25 – 0,87). Học sinh có kiến thức tốt có thái độ tốt cao gấp 2,8 lần học sinh có thái độ không tốt (95%CI: 1,88 – 4,18). Kết luận: Tỷ lệ học sinh có kiến thức, thái độ tốt với vấn đề chăm sóc sức khỏe răng miệng tương đối cao nhưng tỷ lệ học sinh thực hành tốt còn khá thấp. Cần phải đẩy mạnh các chương trình nha cộng đồng, giáo dục những kiến thức đúng đắn về chăm sóc răng miệng, nhấn mạnh vai trò quan trọng của nhà trường, thầy cô, gia đình đặc biệt là tinh thần tự giác của học sinh trong vấn đề chăm sóc sức khỏe răng miệng.
    Type of Medium: Online Resource
    ISSN: 1859-1868
    URL: Article
    DOI: 10.51298/vmj.v521i1.3963
    Language: Unknown
    Publisher: Vietnam Medical Journal, Vietnam Medical Association
    Publication Date: 2023
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