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        Evaluation of potential probiotic and technological properties of lactic acid bacteria isolated from traditional fermented lap xuong sausage in northwestern Vietnam

        Hoang Thi Lan Anh,Le Thi Thanh Hue,Bui Nguyen Hai Linh,Trinh Thanh Trung 한국미생물학회 2023 미생물학회지 Vol.59 No.2

        Consumer demand for high-quality and safe fermented meat products is increasing recently, with great attention on functional starter cultures using lactic acid bacteria (LAB). This study aimed to select autochthonous LAB strains that have beneficial effects for human health and technological properties for the production of lap xuong, a traditional fermented sausage of ethnic minorities in northwestern Vietnam. From nine lap xuong samples, 63 LAB strains were isolated and identified into 14 species belonging to 8 genera. Latilactobacillus sakei was the most common species, followed by Lactiplantibacillus plantarum, Lactococcus lactis, and Pediococcus pentosaceus. Five strains of Enterococcus faecium LM0204, Lactococcus lactis LM0302, Latilactobacillus sakei LM0405, Lactiplantibacillus plantarum LM0705, and Lactiplantibacillus plantarum LM0901 exhibited probiotic properties, including tolerance to gastrointestinal tract conditions, adhesion ability to HT-29 cell line, antagonistic activity against harmful bacteria, and antioxidant activities. The strains were further evaluated for technological and safe properties, such as gas production, growth at different temperatures and simulated fermentation and ripening stages, lactic acid production, biogenic amine production, and antibiotic susceptibility. Enterococcus faecium LM0204 and Lactococcus lactis LM0302 were excluded because of tyramine production or unable growth in simulated fermentation conditions. All together probiotic properties and better technical functionality, Latilactobacillus sakei LM0405 and Lactiplantibacillus plantarum LM0705 were proposed as starter cultures for sausage production in northwestern Vietnam. Further studies are needed to standardize the sensory quality and safety aspects of lap xuong in this area using the proposed starter cultures strains for making fermented sausage.

      • SCOPUS

        Factors Influencing Technology Adoption in Vietnam's Educational System

        TRAN, Nga,LE, Thanh,NGUYEN, Lan,HOANG, Linh,NGUYEN, Thuy Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.10

        This research aims to shed light on the technology adoption process and its drivers in the Vietnamese educational system. Research data was collected with an online questionnaire from more than 600 teachers in primary schools, secondary schools, high schools, colleges, and universities in Vietnam in 2020. Based on a holistic literature review, we develop a model of two extrinsic factors (global needs and school-infrastructure), and two intrinsic factors (teachers' technological literacy and their beliefs), which are correlated with the teachers' technological adoption. We measure the dependent variable by asking the teachers' ability and their efficacy to implement technology in teaching according to a Likert scale. With the support of SPSS_22 and STATA_2015, we find that over 70% of changes in technology adoption are explained by the changes in four independent variables and three control variables related to age, gender, and teaching-level of the teachers. Furthermore, these independent variables are significantly and positively associated with two dependent variables. However, a significant difference in technology integration ability can be seen among teachers' gender, age, and school-level. Specifically, male teachers seem to adopt technology at schools than female teachers better, and university teachers have the lowest level of technology adoption compared to other school-level teachers.

      • KCI등재

        X-ray absorption spectroscopies of Mg-Al-Ni hydrotalcite like compound for explaining the generation of surface acid sites

        Hong Khanh Dieu Nguyen,Toan Dang Nguyen,Dung Ngoc Hoang,Duc Sy Dao,Thao Tien Nguyen,Limphirat Wanwisa,Lan Linh Hoang 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.2

        Hydrotalcite-like compound containing metal cations such as Mg2+, Al3+ and Ni2+ was characterized using Ni K-edge EXAFS and in situ Ni K-edge XANES techniques for clarifying its bonding environment around Ni2+ sites and structure changes during calcination from room temperature to 550 oC, respectively. At the fixed molar ratio of Mg/Ni/Al of 2/1/1, the results obtained from EXAFS analysis showed a slight blue shift before and after the calcination at 550 oC and a reduction in white line peak; the best fits of the two samples revealed tiny change in coordination number about 7 for Ni-O path but considerable difference for Ni-Mg(Al) path from about 4.5 to 9.5, confirming a modification from brucite like to mixed oxide structure. On the other hand, bond distances of the Ni-O and Ni-Mg paths nearly fixed at about 2.06 Å to 3.0 Å reflected stability of the cationic bond order on each plane, but partial collapse and decomposition of the interlayer formed by water molecules and anion CO3 2− after the calcination. Linear combination fit extracted from the in situ Ni K-edge XANES also confirmed the changes along with the calcination such as slow and fast decreases of brucite fraction at 150 oC and 330 oC, respectively, in corresponding to the mixed oxide fraction increases. The achieved bonding structures were also applied to explain acid-base occurrence of the hydrotalcite-like material, especially the acid sites generated by different static charges along with the bonds. The explanation was illustrated by NH3-TPD method.

      • KCI등재

        Impact of long COVID-19 on posttraumatic stress disorder as modified by health literacy: an observational study in Vietnam

        Han Thi Vo,Tien Duc Dao,Tuyen Van Duong,Tan Thanh Nguyen,Binh Nhu Do,Tinh Xuan Do,Khue Minh Pham,Vinh Hai Vu,Linh Van Pham,Lien Thi Hong Nguyen,Lan Thi Huong Le,Hoang Cong Nguyen,Nga Hoang Dang,Trung 질병관리청 2024 Osong Public Health and Research Persptectives Vol.15 No.1

        Objectives: The incidence of posttraumatic stress disorder (PTSD) has increased, particularly among individuals who have recovered from coronavirus disease 2019 (COVID-19) infection. Health literacy is considered a “social vaccine” that helps people respond effectively to the pandemic. We aimed to investigate the association between long COVID-19 and PTSD, and to examine the modifying role of health literacy in this association.Methods: A cross-sectional study was conducted at 18 hospitals and health centers in Vietnam from December 2021 to October 2022. We recruited 4,463 individuals who had recovered from COVID-19 infection for at least 4 weeks. Participants provided information about their sociodemographics, clinical parameters, health-related behaviors, health literacy (using the 12-item short-form health literacy scale), long COVID-19 symptoms and PTSD (Impact Event Scale-Revised score of 33 or higher). Logistic regression models were used to examine associations and interactions.Results: Out of the study sample, 55.9% had long COVID-19 symptoms, and 49.6% had PTSD. Individuals with long COVID-19 symptoms had a higher likelihood of PTSD (odds ratio [OR], 1.68; 95% confidence interval [CI], 1.63–2.12; p<0.001). Higher health literacy was associated with a lower likelihood of PTSD (OR, 0.98; 95% CI, 0.97–0.99; p=0.001). Compared to those with long COVID-19 symptoms and the lowest health literacy score, those with long COVID-19 symptoms and a 1-point health literacy increment had a 3% lower likelihood of PTSD (OR, 0.97; 95% CI, 0.96–0.99; p=0.001).Conclusion: Health literacy was found to be a protective factor against PTSD and modified the negative impact of long COVID-19 symptoms on PTSD.

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