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  • 1
    Online Resource
    Online Resource
    Preparation of silver nanoparticles fabrics against multidrug-resistant bacteria
    Elsevier BV ; 2016
    In:  Radiation Physics and Chemistry Vol. 121 ( 2016-04), p. 87-92
    Details
    In: Radiation Physics and Chemistry, Elsevier BV, Vol. 121 ( 2016-04), p. 87-92
    Type of Medium: Online Resource
    ISSN: 0969-806X
    URL: Article
    DOI: 10.1016/j.radphyschem.2015.12.024
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2016
    detail.hit.zdb_id: 2019621-0
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  • 2
    Online Resource
    Online Resource
    MoS2 hydrogen evolution catalysis on p-Si nanorod photocathodes
    Elsevier BV ; 2021
    In:  Materials Science in Semiconductor Processing Vol. 121 ( 2021-01), p. 105308-
    Details
    In: Materials Science in Semiconductor Processing, Elsevier BV, Vol. 121 ( 2021-01), p. 105308-
    Type of Medium: Online Resource
    ISSN: 1369-8001
    URL: Article
    DOI: 10.1016/j.mssp.2020.105308
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2029689-7
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  • 3
    Online Resource
    Online Resource
    ĐIỆN CỰC NANO CẤU TRÚC 3D - PHÂN LỚP DỊ THỂ CỦA CdS/ZnO/Pt/WO3 TRONG VIỆC NÂNG CAO HIỆU SUẤT TÁCH NƯỚC QUANG ĐIỆN HÓA
    Hue University ; 2021
    In:  Hue University Journal of Science: Natural Science Vol. 130, No. 1C ( 2021-09-30), p. 31-41
    Details
    In: Hue University Journal of Science: Natural Science, Hue University, Vol. 130, No. 1C ( 2021-09-30), p. 31-41
    Abstract: Trong bài báo này, chúng tôi nghiên cứu chế tạo điện cực có cấu trúc 3D phân lớp dị thể (cây – cành – nhánh) CdS/ZnO/Pt/WO3 ứng dụng cho tách nước quang điện hóa. Điện cực được tổng hợp bằng phương pháp thủy nhiệt và lắng đọng lớp nguyên tử. Hình thái học, cấu trúc tinh thể, và thành phần nguyên tố của điện cực này được nghiên cứu bằng kính hiển vi điện tử quét (FE–SEM), kính hiển vị điện tử truyền qua (HR–TEM) và nhiễu xạ tia X (XRD). Nghiên cứu tính chất quang điện hóa của cấu trúc CdS/ZnO/Pt/WO3, chúng tôi thu được mật độ dòng quang điện là 8,5 mA·cm-2 và hiệu suất chuyển đổi năng lượng ánh sáng mặt trời thành năng lượng hydro 7,9 %% tại thế cung cấp –0,85 V trong dung dịch chất điện ly Na2S với nồng độ 0,5 mol/L. Cấu trúc 3D phân lớp này có mật độ dòng quang điện của điện cực cao hơn gấp hai lần so với các cấu trúc CdS/ZnO trên điện cực thủy tinh phủ oxit thiếc pha tạp bằng flo. Đây là một hướng tiếp cận rất hứa hẹn tổng hợp các cấu trúc nano phân lớp dị thể nhằm nâng cao hiệu quả sản xuất hydro.
    Type of Medium: Online Resource
    ISSN: 2615-9678 , 1859-1388
    URL: Issue
    URL: Article
    DOI: 10.26459/hueunijns.v130i1C
    DOI: 10.26459/hueunijns.v130i1C.5887
    Language: Unknown
    Publisher: Hue University
    Publication Date: 2021
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  • 4
    Online Resource
    Online Resource
    Sn doped Hematite Nanorods for High-Performance Photoelectrochemical Water Splitting
    Hanoi University of Science and Technology ; 2021
    In:  Vietnam Journal of Catalysis and Adsorption Vol. 10, No. 1S ( 2021-10-15), p. 405-409
    Details
    In: Vietnam Journal of Catalysis and Adsorption, Hanoi University of Science and Technology, Vol. 10, No. 1S ( 2021-10-15), p. 405-409
    Abstract: Photoelectrochemical water splitting is of great attention due to its environmentally friendly generation of clean fuels. Hematite (α-Fe2O3) is considered a promising candidate due to its intrinsic properties for the high-performance photoelectrochemical electrode, such as favorable bandgap (2.0–2.2 eV), a suitable energy band position non-toxicity, low cost, and excellent chemical stability. Herein, we report about Sn-doped hematite nanorods and their implementation as photoanodes for photoelectrochemical water splitting. We provide the simple but efficient route to incorporate the Sn into the hematite without structural damage in the nanostructure and scrutinize the effect of Sn dopant on the photoelectrochemical activity of the hematite. Sn can be successfully incorporated into the hematite by the two-step heat treatment process, which reveals the enhanced photoelectrochemical responses compared with undoped hematite.  We elaborate on the effect of Sn dopant in the hematite on the photoelectrochemical activities, thereby suggesting the optimum concentration of Sn dopant.
    Type of Medium: Online Resource
    ISSN: 0866-7411
    URL: Article
    DOI: 10.51316/jca.2021.129
    Language: Unknown
    Publisher: Hanoi University of Science and Technology
    Publication Date: 2021
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  • 5
    Online Resource
    Online Resource
    DIBENZOCYCLOOCTADIENE LIGNANS ISOLATED FROM THE ROOTS OF SCHISANDRA CAULIFLORA AND THEIR NITRIC OXIDE INHIBITION ACTIVITY ON LPS STIMULATED RAW 264.7 CELLS
    Vietnam Military Medical University ; 2023
    In:  VietNam Military Medical Unisversity Vol. 48, No. 6 ( 2023-08-22), p. 114-125
    Details
    In: VietNam Military Medical Unisversity, Vietnam Military Medical University, Vol. 48, No. 6 ( 2023-08-22), p. 114-125
    Abstract: Objectives: To isolate and determine the chemical structure of some compounds from the roots of Schisandra Cauliflora and their inhibitory activity on nitric oxide production. Methods: The roots of Schisandra cauliflora, which were collected in Vinh Phuc in April 2022, were processed before being extracted and isolated to obtain compounds. Compounds structures were elucidated based on extensive spectroscopic analyses, including 1D- and 2D-nuclear magnetic resonance spectroscopy (NMR), mass spectrometry (HR-ESI-MS), and CD spectra. The obtained compounds were evaluated for inhibitory activity on nitric oxide production on LPS stimulated RAW 264.7 cells. Results and conclusion: From the methanol extract of the roots of Schisandra cauliflora, three dibenzocyclooctadiene lignans were isolated, including ananonin J, ananolignan F, and ananolignan C. Their structures were elucidated. All the compounds inhibited nitric oxide productions on LPS stimulated RAW 264.7 cells with IC50 values of 45.24 ± 1.46, 41.32 ± 1.45, and 48.71 ± 1.34µM, respectively, compared to that of the positive control of dexamethasone (IC50 14.20 ± 0.54µM). This is the first time these lignan compounds have been isolated from the roots of Schisandra cauliflora.
    Type of Medium: Online Resource
    ISSN: 1859-0748
    URL: Issue
    URL: Article
    DOI: 10.56535/jmpm.v48i6
    DOI: 10.56535/jmpm.v48i6.383
    Language: Unknown
    Publisher: Vietnam Military Medical University
    Publication Date: 2023
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  • 6
    Online Resource
    Online Resource
    Evaluation of the protective effect of agar-hp hard capsule for peptic ulcer in experimental animals
    Hanoi Medical University ; 2023
    In:  Tạp chí Nghiên cứu Y học Vol. 161, No. 12E11 ( 2023-03-14), p. 135-142
    Details
    In: Tạp chí Nghiên cứu Y học, Hanoi Medical University, Vol. 161, No. 12E11 ( 2023-03-14), p. 135-142
    Abstract: Imbalance between exogenous damaging agents and protective factors in the gastro-duodenum tract can lead to peptic ulcer disease. Herbal medicines could be an effective treatment to human gastric ulcers. This study aimed to investigate the protective effect of AGAR-HP hard capsules on cysteamine-induced gastric-duodenal ulcers in experimental rats. The animals were divided into five treatment groups: Group 1 (control) and group 2 (model) were treated with distilled water, group 3 received esomeprazole at 10 mg/kg, group 4 received AGAR-HP at 0.074 g/kg, and group 5 received AGAR-HP at 0.221 g/kg. All the rats were treated for seven consecutive days. On day 7, peptic-duodenal ulcer were induced by oral cysteamine 400 mg/kg. The number of rats with the ulcer, the number of ulcers per rat, and the ulcer index of each group were recorded. Compared to group 2, AGAR-HP at high dose reduced the mean number of ulcers and the ulcer index under macroscopic and microscopic examinations. These parameters also decreased in the group of AGAR-HP low doses compared to the cysteamine control group. AGAR-HP hard capsules showed some protective effect on cysteamine-induced gastric ulcers in experimental rats.
    Type of Medium: Online Resource
    ISSN: 2354-080X , 2354-080X
    URL: Issue
    URL: Article
    DOI: 10.52852/tcncyh.v161i12E11
    DOI: 10.52852/tcncyh.v161i12E11.1181
    Language: Unknown
    Publisher: Hanoi Medical University
    Publication Date: 2023
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  • 7
    Online Resource
    Online Resource
    GLYCOSIDES ISOLATED FROM THE AERIAL PARTS OF Premna integrifolia L. GROWING IN THAI BINH
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Vietnam Journal of Science and Technology Vol. 57, No. 4 ( 2019-07-01), p. 420-
    Details
    In: Vietnam Journal of Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 57, No. 4 ( 2019-07-01), p. 420-
    Abstract: From the aerial parts of Premna integrifolia L., three glycosides acteoside (1), premnaodoroside A (2), and premnaodoroside B (3) were isolated. Their chemical structures were elucidated by means of ESI-MS, 1H-NMR, 13C-NMR, HSQC, HMBC spectra and in comparison with the previous literature. To our best knowledge, this is the first report of 1 and 3 from P. integrifolia.
    Type of Medium: Online Resource
    ISSN: 2525-2518 , 2525-2518
    URL: Article
    DOI: 10.15625/2525-2518/57/3/13076
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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  • 8
    Online Resource
    Online Resource
    TÌNH HÌNH NGHIÊN CỨU PHÁT HIỆN CÁC LOÀI VI KHUẨN MỚI TRONG ĐẤT TRỒNG NHÂN SÂM (PANAX L.) TRÊN THẾ GIỚI
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2017
    In:  Vietnam Journal of Biotechnology Vol. 15, No. 3 ( 2017-09-30), p. 403-422
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 15, No. 3 ( 2017-09-30), p. 403-422
    Abstract: Với hàm lượng mùn cao (2-10%), độ ẩm tốt (40-60%), pH hơi chua (khoảng 5-6), đất trồng sâm được coi là một trong những môi trường thích hợp cho vi khuẩn phát triển. Quần xã vi khuẩn trong đất trồng sâm rất đa dạng với nhiều loài mới đã được phát hiện và phân loại. Cho đến nay đã có 152 loài vi khuẩn mới được phân lập từ đất trồng sâm được công bố, chủ yếu ở Hàn Quốc (141 loài), tiếp theo là Trung Quốc (09 loài) và Việt Nam (02 loài). Các loài mới phát hiện được phân loại và xếp nhóm vào 5 ngành lớn gồm: Proteobacteria (48 loài), Bacteroidetes (49 loài), Actinobacteria (34 loài), Firmicutes (20 loài) và Armatimonadetes (01 loài). Ngoài tính mới, những loài được phát hiện còn có tiềm năng ứng dụng trong việc hạn chế các bệnh cây do nấm gây ra, tăng hàm lượng hoạt chất trong củ sâm hay sản xuất chất kích thích sinh trưởng thực vật...Trong đó các nghiên cứu đặc biệt quan tâm đến những loài có đặc tính chuyển hóa các ginsenoside chính (Rb1, Rb2, Rc, Re, Rg1) - chiếm tới 80% tổng số ginsenoside trong củ sâm sang dạng các ginsenoside chiếm lượng nhỏ (Rd, Rg3, Rh2, CK, F2) nhưng lại có hoạt tính dược học cao hơn. Sâm Ngọc Linh hay còn được gọi là Sâm Việt Nam (Panax vietnamensis Ha et Grushv.) – loài đặc hữu của Việt Nam đang được quan tâm phát triển và mở rộng vùng trồng. Tuy nhiên, việc tập trung nghiên cứu sâu về đặc điểm thổ nhưỡng, đặc biệt là hệ vi sinh đất trồng sâm Ngọc Linh chưa có nhiều. Chính vì vậy, bài viết này tổng quan nghiên cứu loài mới trong đất trồng sâm trên thế giới là nguồn tư liệu cần thiết trong việc định hướng nghiên cứu về quần xã vi khuẩn cũng như phát hiện các loài vi khuẩn mới trong đất trồng sâm Ngọc Linh có khả năng ứng dụng và phát triển ở Việt Nam.
    Type of Medium: Online Resource
    ISSN: 1811-4989 , 1811-4989
    URL: Article
    DOI: 10.15625/1811-4989/15/3/13368
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2017
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  • 9
    Online Resource
    Online Resource
    ent -Kaurane Diterpenes from Annona glabra and Their Cytotoxic Activities
    SAGE Publications ; 2014
    In:  Natural Product Communications Vol. 9, No. 12 ( 2014-12), p. 1934578X1400901-
    Details
    In: Natural Product Communications, SAGE Publications, Vol. 9, No. 12 ( 2014-12), p. 1934578X1400901-
    Abstract: A new ent-kaurane glycoside, annoglabasin H (1), and three known ent-kauranes, annoglabasin E (2), annoglabasin B (3), and 19-nor- ent-kaurent-4-ol-17-oic acid (4) were isolated from the fruits of Annona glabra. Their structures were determined by the combination of spectroscopic and chemical methods, including 1D- and 2D-NMR spectroscopy, as well as by comparison with the NMR data reported in the literature. The cytotoxic activities of these compounds were evaluated on four human cancer cell lines, LU-1, MCF-7, SK-Mel2, and KB. Compound 1 exhibited significant cytotoxic activity on all tested human cancer cell lines with IC 50 values ranging from 3.7 to 4.6 μM.
    Type of Medium: Online Resource
    ISSN: 1934-578X , 1555-9475
    URL: Article
    DOI: 10.1177/1934578X1400901204
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2430442-6
    SSG: 15,3
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  • 10
    Online Resource
    Online Resource
    Clinical benefit of AI-assisted lung ultrasound in a resource-limited intensive care unit
    Springer Science and Business Media LLC ; 2023
    In:  Critical Care Vol. 27, No. 1 ( 2023-07-01)
    Details
    In: Critical Care, Springer Science and Business Media LLC, Vol. 27, No. 1 ( 2023-07-01)
    Abstract: Interpreting point-of-care lung ultrasound (LUS) images from intensive care unit (ICU) patients can be challenging, especially in low- and middle- income countries (LMICs) where there is limited training available. Despite recent advances in the use of Artificial Intelligence (AI) to automate many ultrasound imaging analysis tasks, no AI-enabled LUS solutions have been proven to be clinically useful in ICUs, and specifically in LMICs. Therefore, we developed an AI solution that assists LUS practitioners and assessed its usefulness in  a low resource ICU. Methods This was a three-phase prospective study. In the first phase, the performance of four different clinical user groups in interpreting LUS clips was assessed. In the second phase, the performance of 57 non-expert clinicians with and without the aid of a bespoke AI tool for LUS interpretation was assessed in retrospective offline clips. In the third phase, we conducted a prospective study in the ICU where 14 clinicians were asked to carry out LUS examinations in 7 patients with and without our AI tool and we interviewed the clinicians regarding the usability of the AI tool. Results The average accuracy of beginners’ LUS interpretation was 68.7% [95% CI 66.8–70.7%] compared to 72.2% [95% CI 70.0–75.6%] in intermediate, and 73.4% [95% CI 62.2–87.8%] in advanced users. Experts had an average accuracy of 95.0% [95% CI 88.2–100.0%] , which was significantly better than beginners, intermediate and advanced users ( p   〈  0.001). When supported by our AI tool for interpreting retrospectively acquired clips, the non-expert clinicians improved their performance from an average of 68.9% [95% CI 65.6–73.9%] to 82.9% [95% CI 79.1–86.7%] , ( p   〈  0.001). In prospective real-time testing, non-expert clinicians improved their baseline performance from 68.1% [95% CI 57.9–78.2%] to 93.4% [95% CI 89.0–97.8%] , ( p   〈  0.001) when using our AI tool. The time-to-interpret clips improved from a median of 12.1 s (IQR 8.5–20.6) to 5.0 s (IQR 3.5–8.8), ( p   〈  0.001) and clinicians’ median confidence level improved from 3 out of 4 to 4 out of 4 when using our AI tool. Conclusions AI-assisted LUS can help non-expert clinicians in an LMIC ICU improve their performance in interpreting LUS features more accurately, more quickly and more confidently.
    Type of Medium: Online Resource
    ISSN: 1364-8535
    URL: Article
    DOI: 10.1186/s13054-023-04548-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2051256-9
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