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  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (19)
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  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (19)
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  • 1
    Online Resource
    Online Resource
    Comparision protocols for extraction of microplastics in water samples
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2023
    In:  Vietnam Journal of Marine Science and Technology Vol. 23, No. 1 ( 2023-03-25), p. 103-112
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 23, No. 1 ( 2023-03-25), p. 103-112
    Abstract: Microplastics (MPs) are increasingly recognized as emerging pollutants in various environmental components. However, protocols for sampling, analysis, and standardization of measurements in MPs research are still under development. The extraction method is a crucial factor that affects the accuracy and comparability of microplastic abundance data. In this study, we evaluated and compared the effectiveness of four different extraction protocols (D, MJ, MA, and S) for separating MPs from water samples of different types (brackish, marine, and river water). Known combinations of MP particles (polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), and polyvinyl chloride (PVC)) with sizes ranging between 150 μm and 700 μm were spiked into water samples. Our results showed that the average recovery efficiency of microplastics using the four studied methods ranged from 53% to 86%. Notably, the recovery efficiency of light-density MPs was higher than that of heavy-density MPs. For purified water samples (PW) obtained from a filtration system, only H2O2 was effective in recovering MPs with an efficiency of 80 ± 6.61%. The S method for MP extraction, which combines SDS, Bioenzyme, H2O2 30%, and a saturated salt solution using NaCl, gave the highest average MP recovery of 78.13 ± 2.39% in PW and 69.72 ± 4.81% in surface water. This method has several advantages over the other three methods, such as low cost, environmental friendliness, and compatibility with various water samples, making it suitable for analyzing large amounts of MPs. Our study highlights the importance of carefully selecting the appropriate extraction protocol for accurate and reliable microplastic analysis in different water samples.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/17430
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2023
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    Online Resource
  • 2
    Online Resource
    Online Resource
    An empirical evaluation of feature extraction for Vietnamese fruit classification
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2022
    In:  Vietnam Journal of Science and Technology Vol. 60, No. 5 ( 2022-11-01), p. 837-852
    Details
    In: Vietnam Journal of Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 60, No. 5 ( 2022-11-01), p. 837-852
    Abstract: In recent years, Vietnamese fruit production has marked significant progress in terms of scale and product structure. Viet Nam enjoys suitable climates for tropic, subtropical fruits, and some temperate fruits. Thanks to the diversified ecology, implementing an automatic classification system has received a significant concern. In this paper, we address the problem of Vietnamese fruit classification. However, the first requirement to explore this problem is the qualified dataset. To this end, we first introduced the UIT-VinaFruit20 dataset, a novel Vietnamese fruit image dataset that includes 63,541 images from 20 types of fruits from three regions of Viet Nam. The diversity in different fruits in distinct areas poses many new challenges. In addition, we further leverage the feature extraction from hand-crafted and deep learning features along with the SVM classification model to effectively classify Vietnamese fruits. The extensive experiments conducted on the UIT-VinaFruit20dataset provide a comprehensive evaluation and insightful analysis. An encouraging empirical success was obtained as the EfficientNetB0 feature achieved the best results of 85.465 % and 86.919 % in terms of Accuracy and Macro F1-score, respectively    
    Type of Medium: Online Resource
    ISSN: 2815-5874 , 2525-2518
    URL: Article
    DOI: 10.15625/2525-2518/16299
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2022
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Marine sediment quality at coastal monitoring stations in Vietnam 2016–2020
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2022
    In:  Vietnam Journal of Marine Science and Technology Vol. 22, No. 3 ( 2022-08-19)
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 22, No. 3 ( 2022-08-19)
    Abstract: Marine sediment quality at Vietnam’s coastal monitoring stations in 2020 has an average ecological risk impact, with an average SQG-Q index of 0.16. 4-Four out of 24 stations have sediment quality with zero ecological risk impact, including Bach Long Vi, Thuan An, Phan Thiet, and Sa Huynh stations. The remaining stations (20/24 stations) have sediment quality with moderate ecological risk impact. The SQG-Q indices in 2020 and 2019 tend to decrease compared to 2018 and 2017.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/16975
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2022
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Polymorphism of the TMPRSS2 gene relating to COVID-19 subceptibility in Vietnamese population
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Academia Journal of Biology Vol. 43, No. 1 ( 2021-03-31)
    Details
    In: Academia Journal of Biology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 43, No. 1 ( 2021-03-31)
    Abstract: Recently, a contagious lung disease named coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), rapidly spread worldwide and has many serious consequences for human health. Human genetic polymorphisms may contribute to the variation of incidence, mortality as well as severity of COVID-19. To date, this factor in the Vietnamese population remains unknown. A cellular protease termed transmembrane protease serine 2 (TMPRSS2) was found to play a vital role in the entry of SARS-CoV-2 into host cells. In this study, we investigated polymorphisms in the TMPRSS2 gene from 270 whole exome sequencing data of Vietnamese peoples. We also employed bioinformatics tools including SIFT, Polyphen-2, and PROVEAN to predict the possible function of missense variants. A total of 34 TMPRSS2 variants were identified, of which, 29 were in non-coding regions and 14 were in coding regions. Variants found in exons included seven synonymous and seven non-synonymous point mutations, one of which was novel mutation (c.A1336C/p.R446R). Mutation c.G589A/p.V197M (rs12329760) possesses the highest frequency and was predicted to have the ability to damage protein by SIFT and Polyphen-2. In addition, the damaging possibility was also found in c.T244G/p.Y82D and c.C896T/p.A299V variants. This study contributes to the understanding of Vietnamese genetic variation databases relating to susceptibility to COVID-19. 
    Type of Medium: Online Resource
    ISSN: 2615-9023 , 2615-9023
    URL: Article
    DOI: 10.15625/2615-9023/15829
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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    Online Resource
  • 5
    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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    Online Resource
  • 6
    Online Resource
    Online Resource
    BIOMASS AND CARBON STOCK ESTIMATION OF COASTAL MANGROVES AT HAI PHONG COAST USING REMOTE SENSING AND FIELD INVESTIGATION- BASED DATA
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Vietnam Journal of Science and Technology Vol. 59, No. 5 ( 2021-10-26)
    Details
    In: Vietnam Journal of Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 59, No. 5 ( 2021-10-26)
    Abstract: Estimated results of 17 plots evenly distributed across study sites showed that the amount of tree carbon stocks was significantly lower than in soil, normally ranged from 9.9 ÷ 29.55 (tons ha-1) and in contrast by using the Walkley-Black method, these total soil organic carbon were in the range from 81.76 ÷ 323.83 tons ha-1 (average = 161.47±15.85 tons ha-1), which pointed out strong relationship between tree density and soil organic carbon in the study areas.
    Type of Medium: Online Resource
    ISSN: 2525-2518 , 2525-2518
    URL: Article
    DOI: 10.15625/2525-2518/59/5/15859
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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    Online Resource
  • 7
    Online Resource
    Online Resource
    HEPATOPROTECTIVE EFFECTS OF PHENOLIC GLYCOSIDES FROM THE METHANOL EXTRACT OF PHYSALIS ANGULATA
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2017
    In:  Vietnam Journal of Science and Technology Vol. 55, No. 2 ( 2017-04-17), p. 161-
    Details
    In: Vietnam Journal of Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 55, No. 2 ( 2017-04-17), p. 161-
    Abstract: By various chromatographic separations, four phenolic glycosides, methyl salicylate 2-O-triglycoside (1), icariside E5 (2), quercetin 3-O-rutinoside (3), and isorhamnetin 3-O-rutinoside (4) were isolated from the methanol extract of the whole plant of Physalis angulata. Their structures were determined by 1D-, 2D-NMR spectroscopic analyses and in comparison with the reported data. Compounds 3 exhibited significantly hepatoprotective activity with an EC50 value of 17.08 µg/mL. This is the first report of 1-4 from Physalis angulata.
    Type of Medium: Online Resource
    ISSN: 2525-2518 , 2525-2518
    URL: Article
    DOI: 10.15625/0866-708X/55/2/8527
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2017
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    Online Resource
  • 8
    Online Resource
    Online Resource
    In vitro safety evaluation of Bacillus subtilis species complex isolated from Vietnam and their additional beneficial properties
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2022
    In:  Vietnam Journal of Biotechnology Vol. 20, No. 4 ( 2022-12-28), p. 727-740
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4 ( 2022-12-28), p. 727-740
    Abstract: Bacillus genus are Gram-positive, rod shaped, spore-forming, aerobic or facultative anaerobic bacteria, which have the ability to produce a wide variety of enzymes, antimicrobial compounds, vitamins, and carotenoids. Nowadays, Bacillus species have been increasingly proposed for use as probiotics or feed additives as B. amyloliquefaciens, B. licheniformis, B. subtilis, and B. pumilus because of their advantages such as heat-stability of the spores, storage capacity at ambient temperature, and beneficial properties for health. Since microbes are used for customers and livestock, it is critical to substantiate not only the health benefits and efficacy of unique strains but also their safety for the hosts. This study aims to evaluate the in vitro safety and some beneficial properties of Bacillus strains to select potential strains for use in humans or animals. A total of 76 Bacillus strains belonged to the B. amyloliquefaciens and B. subtilis groups were preliminary evaluated for their safety via hemolytic activity. Six non-hemolytic strains were identified and their antibiotic susceptibility, cytotoxicity on the growth of HT29 and Vero cells, extracellular enzyme production, antimicrobial activity, and identification based on 16S rRNA and rpoB gene sequences were studied. Two strains, B. subtilis VTCC 10963 and B. subtilis VTCC 11039, should be considered safe. In addition, these two strains exhibited good extracellular enzyme production (amylase, cellulase, and protease) and strong antibacterial activity against Listeria monocytogenes. Our results support the use of B. subtilis VTCC 10963 and B. subtilis VTCC 11039 for the development of probiotic products and feed additives in the future.
    Type of Medium: Online Resource
    ISSN: 2815-5912 , 2815-5955
    URL: Article
    DOI: 10.15625/1811-4989/16917
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2022
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  • 9
    Online Resource
    Online Resource
    Complete mitochondrial genome of Dong Tao chicken breed (Gallus gallus domesticus) of Vietnam
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2020
    In:  Vietnam Journal of Biotechnology Vol. 16, No. 4 ( 2020-08-08), p. 589-593
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 16, No. 4 ( 2020-08-08), p. 589-593
    Abstract: The complete mitochondrial genome of Dong Tao chicken breed (Gallus gallus domesticus, Dong Tao) was obtained by PCR and sequencing. The complete mitogenome was 16,783 bp in length, with the nucleotide composition for A, T, C, G was 30.29%, 23.75%, 32.48%, and 13.48%, respectively. The mitogenome of Dong Tao chicken contained a non-coding control region (D-loop), 2 rRNA genes, 13 protein-coding genes, and 22 tRNA genes. Phylogenetic analysis revealed that breed Dong Tao chicken breed was sister-close to G. gallus breed Guangxi, and paraphyletic to G. spadiceus, S. jabouillei, and a range of Chinese indigenous, ie. breeds Rugao and Taoyuan.
    Type of Medium: Online Resource
    ISSN: 1811-4989 , 1811-4989
    URL: Article
    DOI: 10.15625/1811-4989/16/4/13090
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2020
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  • 10
    Online Resource
    Online Resource
    STUDY ON APPLICATION OF MULTIPLEX LIGATION-DEPENDENT PROBE AMPLIFICATION (MLPA) ASSAY IN MOLECULAR DIAGNOSIS OF RETINOBLASTOMA
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  Vietnam Journal of Biotechnology Vol. 15, No. 4 ( 2018-12-14), p. 625-631
    Details
    In: Vietnam Journal of Biotechnology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 15, No. 4 ( 2018-12-14), p. 625-631
    Abstract: Retinoblastoma (Rb) is a malignant retinal tumor on young children which is often founded before the age of 5. This cancer disease appears when both of RB1 alleles on 13q14.2 chromosome are mutated. The aim of this research is to evaluate the ability of Multiplex Ligation-dependent Probe Amplification (MLPA) in screening of RB1 gene insertion/deletions in Vietnamese patients with Rb. Genomic DNA was isolated from peripheral blood of the research subjects and subsequently analyzed by MLPA technique. To prove the results of MLPA, quantitative real-time PCR was used for determining the RB1 gene copy number for all samples. Two significant deletion mutations were identified on two different Rb patients, one is the deletion from exon 4 to exon 27 recorded on KVM38 sample, and the other is the complete removal of an allele on KVM21 sample. The MLPA showed a complete correlation with real-time PCR results. These are the disease causing mutations, can be inherited and they are important evidences for genetic counseling and clinical management. Those results have proven the high speed and reliability of MLPA method in identifying deletion/duplication mutations on Rb patients.
    Type of Medium: Online Resource
    ISSN: 1811-4989 , 1811-4989
    URL: Article
    DOI: 10.15625/1811-4989/15/4/13402
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2018
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