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  • 1
    Online Resource
    Online Resource
    Characteristics of fly ash from the municipal solid waste incineration plant in Can Tho
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2023
    In:  Vietnam Journal of Science and Technology ( 2023-06-20), p. 681-691
    Details
    In: Vietnam Journal of Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), ( 2023-06-20), p. 681-691
    Abstract: In this study, 16 seasonal fly ash samples of municipal solid waste incinerator (MSWI) were collected in from waste-to energy power plant Cantho city to analysis the physical properties and heavy metals content. The results showed that the fly ash samples are very alkaline with porous and spherical shape, and the particle size of 1-100 µm. The analytical results disclosed that in these fly ash samples, the Zn, Pb, Al, Fe and Cr metals were found at high content range from 0.36-19.05 mg/kg while the toxic metals Ni and Hg are also found in fly ash, with the content from 0.141 to 0.51 mg/kg. Thus, fly ash is not hazardous waste and can be used for reuse in industries or land reclamation. The analysis results of SEM/EDX and XRF were quite similar with a difference of below 5%, indicating that both methods can be applied to research heavy metals. The findings in this study can guide the management, treatment and reuse of fly ash from MSWI incineration plants in Vietnam.
    Type of Medium: Online Resource
    ISSN: 2815-5874 , 2525-2518
    URL: Article
    DOI: 10.15625/2525-2518/17538
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2023
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  • 2
    Online Resource
    Online Resource
    Cost-Effectiveness of Amphotericin B Deoxycholate Versus Itraconazole for Induction Therapy of Talaromycosis in Human Immunodeficiency Virus–Infected Adults in Vietnam
    Oxford University Press (OUP) ; 2021
    In:  Open Forum Infectious Diseases Vol. 8, No. 7 ( 2021-07-01)
    Details
    In: Open Forum Infectious Diseases, Oxford University Press (OUP), Vol. 8, No. 7 ( 2021-07-01)
    Abstract: Talaromycosis (penicilliosis) is an invasive fungal infection and a major cause of human immunodeficiency virus (HIV)–related deaths in Southeast Asia. Guidelines recommend induction therapy with amphotericin B deoxycholate; however, treatment with itraconazole has fewer toxic effects, is easier to administer, and is less expensive. Our recent randomized controlled trial in Vietnam found that amphotericin B was superior to itraconazole with respect to 6-month mortality. We undertook an economic evaluation alongside this trial to determine whether the more effective treatment is cost-effective. Methods Resource use, direct and indirect costs, and health and quality-of-life outcomes (measured using quality-adjusted life-years [QALYs]) were evaluated for 405 trial participants from 2012 to 2016. Both a Vietnamese health service and a broader societal costing perspective were considered. Mean costs and QALYs were combined to calculate the within-trial cost-effectiveness of amphotericin vs itraconazole from both perspectives. Results From a Vietnamese health service perspective, amphotericin increases costs but improves health outcomes compared to itraconazole, at a cost of $3013/QALY gained. The probability that amphotericin is cost-effective at a conventional (World Health Organization CHOICE) threshold of value for money is 46%. From a societal perspective, amphotericin is cost-reducing and improves outcomes compared to itraconazole, and is likely to be a cost-effective strategy at any value for money threshold greater than $0. Conclusions Our analysis indicates that induction therapy with amphotericin is a cost-effective treatment strategy for HIV-infected adults diagnosed with talaromycosis in Vietnam. These results provide the evidence base for health care providers and policy makers to improve access to and use of amphotericin.
    Type of Medium: Online Resource
    ISSN: 2328-8957
    URL: Article
    DOI: 10.1093/ofid/ofab357
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2021
    detail.hit.zdb_id: 2757767-3
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  • 3
    Online Resource
    Online Resource
    Develop a clean air action plan based on scientific data: a case of Ho Chi Minh city
    Viet Nam National University Ho Chi Minh City ; 2020
    In:  Science and Technology Development Journal - Natural Sciences Vol. 4, No. 1 ( 2020-12-20), p. first-
    Details
    In: Science and Technology Development Journal - Natural Sciences, Viet Nam National University Ho Chi Minh City, Vol. 4, No. 1 ( 2020-12-20), p. first-
    Abstract: Ho Chi Minh City (HCMC) has quickly become a modernized and industrialized city undergoing a rapid population growth affecting on the local environment, especially the air quality and human health. It's urgent need to have a Clean Air Action Plan (CAP) for HCMC. The aim of this research is to develop a clean air plan for HCMC based on scientific basis by integrating results of emissions inventory, air emssion loading capacties and results of the impact of air pollution on people's health. This research applied the Clean Air For Smaller City in ASEAN Region project (CASC) method of Germany to develop the CAP. Emission inventory resulted from the integration of two approaches of bottom-up and top-down. The results of simulation of air pollution dispersion and air emission loading capacities were from the TAPM-CTM model system. Method of calculating the impact of air pollution on the health of people in Ho Chi Minh City was based on BENMAP model theory. The results showed that the source of traffic accounts for the largest emissions of all pollutants, contributed respectively, 99%, 97%, 93%, 78%, 23%, 64% and 45% of total CO, NMVOC emissions, NOx, SO2, TSP, CH4, and PM2:5 of the whole HCMC. For some central areas, the city was no longer able to receive more emissions of CO and NOx. Assessing the impact of air pollution on health showed that the great impact of PM2:5 on public health accounted for 81.45% of the total deaths caused by all three pollutants ( PM2:5, SO2, NO2). Finally, a CAP was suggested with 13 proposals and 1 recommendation for reducing air pollution in HCMC for the period of 2020–2025. This is the first comprehensive study on CAP in Vietnam. This result supports government authorities to promulgate plans and actions to reduce emissions protecting human health and the environment for a sustainable development.
    Type of Medium: Online Resource
    ISSN: 2588-106X , 2588-106X
    URL: Article
    DOI: 10.32508/stdjns.v4i1.991
    Language: Unknown
    Publisher: Viet Nam National University Ho Chi Minh City
    Publication Date: 2020
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  • 4
    Online Resource
    Online Resource
    CoFe2O4 Nanomaterials: Effect of Annealing Temperature on Characterization, Magnetic, Photocatalytic, and Photo-Fenton Properties
    MDPI AG ; 2019
    In:  Processes Vol. 7, No. 12 ( 2019-11-28), p. 885-
    Details
    In: Processes, MDPI AG, Vol. 7, No. 12 ( 2019-11-28), p. 885-
    Abstract: In this research, structural, magnetic properties and photocatalytic activity of cobalt ferrite spinel (CoFe2O4) nanoparticles were studied. The samples were characterized by X-ray powder diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscopy (SEM), transmission electronic microscopy (TEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), and UV-visible diffused reflectance spectroscopy (DRS) analysis. The XRD analysis revealed the formation of the single-phase CoFe2O4 with a cubic structure that is annealed at 500–700 °C in 3 h. The optical band gap energy for CoFe2O4 was determined to be in the range of 1.57–2.03 eV. The effect on the magnetic properties of cobalt ferrites was analyzed by using a vibrating sample magnetometer (VSM). The particle size and the saturation magnetization of cobalt ferrite nanoparticles increased with increasing annealing temperature. The photocatalytic activity of CoFe2O4 nanoparticles was investigated by using rhodamine B dye under visible light. The decomposition of rhodamine B reached 90.6% after 270 min lighting with the presence of H2O2 and CF500 sample.
    Type of Medium: Online Resource
    ISSN: 2227-9717
    URL: Article
    DOI: 10.3390/pr7120885
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2720994-5
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  • 5
    Online Resource
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    LÊN MEN LACTIC TẠO ĐỒ UỐNG GIÀU PROBIOTIC TỪ THANH LONG RUỘT TRẮNG (Hylocereus undatus)
    Hue University ; 2020
    In:  Hue University Journal of Science: Natural Science Vol. 129, No. 1A ( 2020-03-20), p. 71-77
    Details
    In: Hue University Journal of Science: Natural Science, Hue University, Vol. 129, No. 1A ( 2020-03-20), p. 71-77
    Abstract: Thanh long (Hylocereus undatus) là loại trái cây chứa hàm lượng dinh dưỡng phong phú, giàu vitamin, khoáng và chất xơ. Đây là nguồn cơ chất rất phù hợp cho vi khuẩn lactic sinh trưởng. Hiện tại ở Việt Nam, thanh long chủ yếu được sử dụng trực tiếp ở dạng quả tươi hoặc lên men tạo rượu. Trong nghiên cứu này, lần đầu tiên dịch quả thanh long trắng được lên men lactic bằng vi khuẩn Lactobacillus acidophilus ATCC 4356 nhằm tạo đồ uống lên men giàu lợi khuẩn, hướng đến đa dạng hóa các sản phẩm từ nguyên liệu thanh long ruột trắng. Các thông số lên men được khảo sát bao gồm nồng độ chất khô, pH, tỉ lệ giống cấy và thời gian lên men. Đồng thời, sức sống của lợi khuẩn theo thời gian bảo quản và khả năng sống sót trong điều kiện khắc nghiệt ở hệ tiêu hóa cũng được theo dõi. Kết quả cho thấy, ở các điều kiện lên men bao gồm nồng độ chất khô 16 °Bx, pH 6,0, tỉ lệ giống cấy 4% (v/v) tương ứng mật độ ban đầu là 4,8 × 107 CFU/mL, thời gian lên men phù hợp nhất là 72 giờ. Sản phẩm có mật độ lợi khuẩn đạt 10,4 log tương ứng với 2,5 × 1010 CFU/mL). Lợi khuẩn trong dịch lên men có khả năng sống sót 94,39% sau 2 giờ ở dịch dạ dày nhân tạo (SGJ, pH 2,0) và 77,19% sau 4 giờ ở dịch ruột nhân tạo (SIF). Sau thời gian bảo quản 21 ngày ở 4 °C, mật độ lợi khuẩn giảm còn 9,91 log.
    Type of Medium: Online Resource
    ISSN: 2615-9678 , 1859-1388
    URL: Issue
    URL: Article
    DOI: 10.26459/hueuni-jns.v129i1A
    DOI: 10.26459/hueuni-jns.v129i1A.5436
    Language: Unknown
    Publisher: Hue University
    Publication Date: 2020
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  • 6
    Online Resource
    Online Resource
    Assessment of the streamflow changes in the La Nga river basin
    Viet Nam National University Ho Chi Minh City ; 2020
    In:  Science and Technology Development Journal - Natural Sciences Vol. 4, No. 1 ( 2020-12-20), p. first-
    Details
    In: Science and Technology Development Journal - Natural Sciences, Viet Nam National University Ho Chi Minh City, Vol. 4, No. 1 ( 2020-12-20), p. first-
    Abstract: The paper aims to assess the changes of the streamflow under the impact of irrigation constructions in La Nga river basin using the Long and Short term runoff (LST) model. The LST model was calibrated and validated for the period of 1987–1995 and 1996–1999, respectively, to simulate the natural streamflow for the post–construction phase. Statistical metrics, including R2 coefficients, efficiency coefficients (NSE), percent error (PBIAS) and standard monitoring deviation ratio (RSR) were used to evaluate the model performance. The results showed that, LST model performed well in the flow simulation by the high values of R2 and NSE index greater than 0.80, RSR smaller than 0.50 and PBIAS lower than 7.22%. The comparison between the simulated (natural) and observed flows illustrated that there were changes of the flow regime in the post–construction phase. The average seasonal flow decreases 24.59% and increased 12.06% in the wet and dry season, respectively at Phu Dien station. Meanwhile, at Ta Pao station, the streamflow decreased 8.35% and increased 21.11% in the wet and dry season, respectively. The results of this study could be used in planning, managing and regulating the irrigation works'operation, and water resources management in the La Nga river basin.
    Type of Medium: Online Resource
    ISSN: 2588-106X , 2588-106X
    URL: Article
    DOI: 10.32508/stdjns.v4i1.993
    Language: Unknown
    Publisher: Viet Nam National University Ho Chi Minh City
    Publication Date: 2020
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  • 7
    Online Resource
    Online Resource
    ĐÁNH GIÁ KẾT QUẢ ĐIỀU TRỊ UNG THƯ PHỔI KHÔNG TẾ BÀO NHỎ GIAI ĐOẠN IB-IIIA BẰNG PHẪU THUẬT VÀ BỔ TRỢ PHÁC ĐỒ BỘ ĐÔI PLATINUM
    Vietnam Medical Journal, Vietnam Medical Association ; 2023
    In:  Tạp chí Y học Việt Nam Vol. 520, No. 1B ( 2023-02-10)
    Details
    In: Tạp chí Y học Việt Nam, Vietnam Medical Journal, Vietnam Medical Association, Vol. 520, No. 1B ( 2023-02-10)
    Abstract: Mục tiêu: 1. Nhận xét một số đặc điểm lâm sàng, cận lâm sàng của nhóm bệnh nhân ung thư phổi không tế bào nhỏ (UPKTBN) giai đoạn IB-IIIA. 2. Đánh giá kết quả điều trị phẫu thuật và hóa chất và bổ trợ phác đồ bộ đôi platinum trên bệnh nhân UTPKTBN giai đoạn IB-IIIA. Bệnh nhân và phương pháp nghiên cứu: Nghiên cứu hồi cứu, cắt ngang, trên 60 bệnh nhân ung thư phổi không tế bào nhỏ giai đoạn IB-IIIA được điều trị hóa chất bổ trợ phác đồ vinorelbine/ pemetrexed-cisplatin sau phẫu thuật triệt căn tại Bệnh viện K từ tháng 1/2019 đến 9/2022. Kết quả: Đặc điểm lâm sàng, cận lâm sàng: Độ tuổi trung bình là 58,52, tỷ lệ nam : nữ = 2,7:1. Có 21 (35%) bệnh nhân giai đoạn IB; 32 (53,3%) bệnh nhân giai đoạn II; và 7 (11,7%) bệnh nhân giai đoạn III. Thể mô bệnh học chiếm tỷ lệ cao nhất là ung thư biểu mô tuyến (76,7%).Có 30 bệnh nhân được điều trị bằng phác đồ vinorelbin-cisplatin chiếm 50% và 30(50%) bệnh nhân điều trị pemetrexed-cisplatin.  Kết quả điều trị: Thời gian sống thêm không bệnh (DFS) trung bình là 30.5 ± 1,67 tháng. Không có sự khác biệt về DFS khi sử dụng vinolrebin-cisplatin so với pemetrexed-cisplatin. Độc tính trên hệ huyết học của phác đồ vinorelbin -cisplatin là hạ bạch cầu 60%, hạ tiểu cầu 13,3%, hạ huyết sắc tố là 15%. Độc tính ngoài hệ huyết học hay gặp nhất là nôn, buồn nôn chiếm 50%. Độc tính trên hệ huyết học của phác đồ pemetrexed -cisplatin là hạ bạch cầu 45%, hạ tiểu cầu 10%, hạ huyết sắc tố là 25%. Độc tính ngoài hệ huyết học hay gặp nhất là nôn, buồn nôn chiếm 45%
    Type of Medium: Online Resource
    ISSN: 1859-1868
    URL: Article
    DOI: 10.51298/vmj.v520i1B.3830
    Language: Unknown
    Publisher: Vietnam Medical Journal, Vietnam Medical Association
    Publication Date: 2023
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  • 8
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    Online Resource
    Study on the adsorption of 2,4-dichlorophenoxyacetic acid on silver doped carbon nanotube using tight-binding quantum chemical method
    Elsevier BV ; 2024
    In:  Computational and Theoretical Chemistry Vol. 1234 ( 2024-04), p. 114517-
    Details
    In: Computational and Theoretical Chemistry, Elsevier BV, Vol. 1234 ( 2024-04), p. 114517-
    Type of Medium: Online Resource
    ISSN: 2210-271X
    URL: Article
    DOI: 10.1016/j.comptc.2024.114517
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2024
    detail.hit.zdb_id: 2587365-9
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  • 9
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    ĐẶC ĐIỂM LÂM SÀNG, CẬN LÂM SÀNG VÀ TÍNH NHẠY CẢM KHÁNG SINH CỦA STREPTOCOCCUS PNEUMONIAE GÂY VIÊM PHỔI CỘNG ĐỒNG Ở TRẺ EM DƯỚI 5 TUỔI TẠI BỆNH VIỆN SẢN NHI NGHỆ AN
    Vietnam Medical Journal, Vietnam Medical Association ; 2021
    In:  Tạp chí Y học Việt Nam Vol. 507, No. 2 ( 2021-12-23)
    Details
    In: Tạp chí Y học Việt Nam, Vietnam Medical Journal, Vietnam Medical Association, Vol. 507, No. 2 ( 2021-12-23)
    Abstract: Mục tiêu: Mô tả đặc điểm lâm sàng, cận lâm sàng của viêm phổi cộng đồng do Streptococcus Pneumoniae (S.Pneumoniae) và mô tả tính nhạy cảm kháng sinh của các chủng S.Pneumoniae  phân lập được ở trẻ dưới 5 tuổi bị viêm phổi cộng đồng tại bệnh viện Sản Nhi Nghệ An. Đối tượng và phương pháp nghiên cứu: Mô tả tiến cứu, 65 bệnh nhân dưới 5 tuổi đủ tiêu chuẩn chẩn đoán viêm phổi cộng đồng do S.Pneumoniae  điều trị tại Bệnh viện Sản Nhi Nghệ An từ 1/2021 – 9/2021 được nghiên cứu, mô tả đặc điểm lâm sàng và cận lâm sàng của viêm phổi, xác định tính nhạy cảm kháng sinh bằng đo nồng độ ức chế tối thiểu (MIC). Kết quả và kết luận: Tỷ lệ bệnh nhân Nam/Nữ là:1,9/1. Lứa tuổi hay gặp nhất là 2 tháng – 24 tháng với tỷ lệ 76,9%. Tỷ lệ bệnh nhân đã dùng kháng sinh trước vào viện cao, chiếm 64,6%. Các triệu chứng như sốt, ho, chảy nước mũi, thở nhanh, phổi có ran gặp tỷ lệ 〉 69%. Xét nghiệm chủ yếu dựa vào Xquang tim phổi, công thức máu, CRP và nuôi cấy dịch tỵ hầu làm kháng sinh đồ. Viêm tai giữa ứ mủ gặp 43,1%. S.Pneumoniae kháng với Azithromycin, Clarithromycin, Erythromycin là 100%; kháng với Cefotaxime là 61,5%, Ceftriaxone là 52,3%, Penicillin là 18,5%. S.Pneumoniae  còn nhạy 100% với Rifampicin, Vancomycin, Linezolid, Levofloxacin.  
    Type of Medium: Online Resource
    ISSN: 1859-1868
    URL: Article
    DOI: 10.51298/vmj.v507i2.1457
    Language: Unknown
    Publisher: Vietnam Medical Journal, Vietnam Medical Association
    Publication Date: 2021
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  • 10
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    The sensitivity of real-time PCR amplification targeting invasive Salmonellaserovars in biological specimens
    Springer Science and Business Media LLC ; 2010
    In:  BMC Infectious Diseases Vol. 10, No. 1 ( 2010-12)
    Details
    In: BMC Infectious Diseases, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2010-12)
    Abstract: PCR amplification for the detection of pathogens in biological material is generally considered a rapid and informative diagnostic technique. Invasive Salmonella serovars, which cause enteric fever, can be commonly cultured from the blood of infected patients. Yet, the isolation of invasive Salmonella serovars from blood is protracted and potentially insensitive. Methods We developed and optimised a novel multiplex three colour real-time PCR assay to detect specific target sequences in the genomes of Salmonella serovars Typhi and Paratyphi A. We performed the assay on DNA extracted from blood and bone marrow samples from culture positive and negative enteric fever patients. Results The assay was validated and demonstrated a high level of specificity and reproducibility under experimental conditions. All bone marrow samples tested positive for Salmonella , however, the sensitivity on blood samples was limited. The assay demonstrated an overall specificity of 100% (75/75) and sensitivity of 53.9% (69/128) on all biological samples. We then tested the PCR detection limit by performing bacterial counts after inoculation into blood culture bottles. Conclusions Our findings corroborate previous clinical findings, whereby the bacterial load of S. Typhi in peripheral blood is low, often below detection by culture and, consequently, below detection by PCR. Whilst the assay may be utilised for environmental sampling or on differing biological samples, our data suggest that PCR performed directly on blood samples may be an unsuitable methodology and a potentially unachievable target for the routine diagnosis of enteric fever.
    Type of Medium: Online Resource
    ISSN: 1471-2334
    URL: Article
    DOI: 10.1186/1471-2334-10-125
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2010
    detail.hit.zdb_id: 2041550-3
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