Characteristics of Immunogenicity against SARS-CoV-2 in a Community-Based Model of Care during the Fourth Wave of COVID-19 Outbreak in Ho Chi Minh City

Lan Ngoc Vuong,Tu Hoang Kim Trinh,Tuan Diep Tran,Duy Le Pham,Vinh Nhu Nguyen,Quan Tran Thien Vu,Toan Duong Pham,Phong Hoai Nguyen,Minh Kieu Le,Diem Dinh Kieu Truong,Vu Anh Hoang,Nghia Huynh,Dat Quoc N 연세대학교의과대학 2024 Yonsei medical journal Vol.65 No.9

Purpose: Although some immune protection from close contact with individuals who have coronavirus disease 2019 (COVID-19) has been documented, there is limited data on the seroprevalence of antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in individuals who were in lockdown with confirmed COVID-19 cases. This study investigated immunogenicity against SARS-CoV-2 in household members and people who lived near home-quarantined patients with COVID-19. Materials and Methods: This cross-sectional study was conducted during the community-based care that took place during lockdowns in District 10, Ho Chi Minh City, Vietnam from July to September 2021. SARS-CoV-2 antibody levels were determined in index cases of COVID-19, household contacts, and a no-contact group from the same area. Results: A total of 770 participants were included (355 index cases, 103 household contacts, and 312 no contacts). All index cases were unvaccinated, but >90% of individuals in the household and no-contact groups had received ≥1 vaccine dose. SARS-CoV-2 neutralizing antibodies (Nabs) were present in >77% of unvaccinated index cases versus 64%/65.4% in the household/no-contact groups (p=0.001). Antibody concentrations in unvaccinated index cases were significantly higher than those in household contacts and no contacts, with no difference between the latter groups. In all cases, antibody levels declined markedly ≥6 weeks after infection, and failed to persist beyond this time in the household and no-contact groups. Conclusion: Community-based care may have helped to create community immunogenicity, but Nabs did not persist, highlighting a need for vaccination for all individuals before, or from 6 weeks after, infection with SARS-CoV-2.

Three-Dimensional Smart Aggregate Sensor for Impedance-based Concrete Stress Monitoring

Pham Ngoc Lan,Pham Quang Quang,Ta Quoc Bao,Kim Jeong Tae 대한토목학회 2023 대한토목학회 학술대회 Vol.2023 No.10

Distribution of Factors Affecting Foreign Direct Investment in ASEAN Countries

Anh Thi Lan NGUYEN(Anh Thi Lan NGUYEN ),Chau Thi Minh PHAM(Chau Thi Minh PHAM ),Hanh Hong NGUYEN(Hanh Hong NGUYEN ),Dat Ngoc NGUYEN(Dat Ngoc NGUYEN ),Duy Van NGUYEN(Duy Van NGUYEN ) 한국유통과학회 2023 유통과학연구 Vol.21 No.2

Purpose: Research on attracting foreign direct investment plays an important role in ASEAN countries. ASEAN has needed FDI capital for development and integration with many developing countries. Research design, data and methodology: This study is conducted to assess the impact of factors: inflation (INF), economic growth (GDP), population (POP), and trade (TRADE) on attracting foreign direct investment (FDI) of ASEAN countries. The study will find out how factors distribution contributes to FDI attraction. The study collects data from 10 ASEAN countries from 2010 to 2020. With data collected for ten countries from 2010 to 2020, data analysis with panel data will be used in this study. The Regression with Driscoll-Kraay standard errors correction model will be used in the study. Results: Panel data analysis shows that economic growth and population positively impact FDI attraction in ASEAN countries. However, two factors: INF and TRADE, do not affect FDI. Conclusions: Countries need to focus on economic development, create many good conditions for people and domestic enterprises and create opportunities for foreign investors to pay more attention. improving the quality of domestic human resources will help to better improve the working quality factor when the demand for high-quality human resources increases.

Asbestos and Asbestos-related Diseases in Vietnam: In reference to the International Labor Organization/World Health Organization National Asbestos Profile

Pham, Van Hai,Tran, Thi Ngoc Lan,Le, Giang Vinh,Movahed, Mehrnoosh,Jiang, Ying,Pham, Nguyen Ha,Ogawa, Hisashi,Takahashi, Ken Occupational Safety and Health Research Institute 2013 Safety and health at work Vol.4 No.2

This paper describes progress on formulating a national asbestos profile for the country of Vietnam. The Center of Asbestos Resource, Vietnam, formulated a National Profile on Asbestos-related Occupational Health, with due reference to the International Labor Organization/World Health Organization National Asbestos Profile. The Center of Asbestos Resource was established by the Vietnamese Health Environment Management Agency and the National Institute of Labor Protection, with the support of the Australian Agency for International Development, as a coordinating point for asbestos-related issues in Vietnam. Under the National Profile on Asbestos-related Occupational Health framework, the Center of Asbestos Resource succeeded in compiling relevant information for 15 of the 18 designated items outlined in the International Labor Organization/World Health Organization National Asbestos Profile, some overlaps of the information items notwithstanding. Today, Vietnam continues to import and use an average of more than 60,000 metric tons of raw asbestos per year. Information on asbestos-related diseases is limited, but the country has begun to diagnose mesothelioma cases, with the technical cooperation of Japan. As it stands, the National Profile on Asbestos-related Occupational Health needs further work and updating. However, we envisage that the National Profile on Asbestos-related Occupational Health will ultimately facilitate the smooth transition to an asbestos-free Vietnam.

Numerical Feasibility of Spherical Smart Aggregate for Damage Detection in Prestressed Concrete Anchorage

Pham Quang Quang,Pham Ngoc Lan,Huynh Thanh Canh,Ho Duc Duy,Kim Jeong Tae 대한토목학회 2022 대한토목학회 학술대회 Vol.2022 No.10

Work Motive Distribution of Public Universities Lecturers in Hanoi

PHAM, Ngoc Thach,BUI, Van Huyen,HA, Dieu Linh,LE, Thi Lan Huong Korea Distribution Science Association 2022 유통과학연구 Vol.20 No.11

Purpose: The study aims to investigate the impact of factors affecting the work motive distribution of public universities lecturers in Hanoi. Research design, data and methodology: The questionnaire survey method is applied in this research to analyze the relationship between the variables and verify the hypothesis based on the collected 306 valid questionnaires. The partial least square method structural equation model (PLS-SEM) is used to carry out structural equation modeling to study the relationship between latent variables with reliable tools (SmartPLS 3.0 software). Results: The research results show that the intrisic motivation of the lecturers, the extrisic motivation of the lecturers and the job characteristics of the lecturers all have a positive impact on the motivation of public universities lecturers in Hanoi. In which, intrinsic motivation has the greatest influence on the work motive distribution of lecturers. In addition, the research results also prove that job characteristics affect the work motive distribution of lecturers. This is a new factor in the factors affecting the work motive distribution of public universities lecturers. Conclusion: Based on the research results, the authors propose some recommendations to increase the work motive distribution of public universities lecturers in Hanoi through improving the factors affecting their work motive distribution.

<i>Paracoccus</i> <i>panacisoli</i> sp. nov., isolated from a forest soil cultivated with Vietnamese ginseng

Nguyen, Ngoc-Lan,Kim, Yeon-Ju,Hoang, Van-An,Tran, Bao-Tram,Pham, Huong-Son,Yang, Deok-Chun International Union of Microbiological Societies 2015 International journal of systematic and evolutiona Vol.65 No.5

<P>A novel bacterial strain, designated DCY94<SUP>T</SUP>, was isolated from forest soil cultivated with ginseng in Vietnam. The strain was Gram-reaction-negative, facultatively anaerobic, non-motile, rod-shaped and catalase- and oxidase-positive. 16S rRNA gene sequence analysis demonstrated that strain DCY94<SUP>T</SUP> was closely related to <I>Paracoccus sphaerophysae</I> Zy-3<SUP>T</SUP> (97.5 % 16S rRNA gene sequence similarity) and <I>Paracoccus caeni</I> MJ17<SUP>T</SUP> (96.9 %). The fatty acid profile of strain DCY94<SUP>T</SUP> contained a predominant amount of summed feature 8 (C<SUB>18 : 1</SUB>ω7<I>c</I> and/or C<SUB>18 : 1</SUB>ω6<I>c</I>; 88.4 %) and moderate to small quantities of C<SUB>8 : 0</SUB> 3-OH (1.0 %), C<SUB>10 : 0</SUB> 3-OH (2.8 %) and C<SUB>18 : 0</SUB> (5.2 %). Phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine and one unidentified glycolipid were major polar lipids; one unidentified aminolipid, one unidentified aminophospholipid, one unidentified phospholipid and four unidentified polar lipids were minor components. The polyamine pattern comprised the major compounds putrescine and spermidine and minor amounts of <I>sym</I>-homospermidine and spermine. The ubiquinone of the strain was Q-10 and the G+C content of its genomic DNA was 68.3 mol%. All these results support the placement of strain DCY94<SUP>T</SUP> within the genus <I>Paracoccus</I> . Levels of DNA–DNA relatedness between strain DCY94<SUP>T</SUP> and <I>P. sphaerophysae</I> HAMBI 3106<SUP>T</SUP> and <I>P. caeni</I> KCTC 22480<SUP>T</SUP> were 52 and 50 %, respectively. The results of phylogenetic analysis, phenotypic tests, chemotaxonomic characterization and DNA–DNA relatedness studies distinguished strain DCY94<SUP>T</SUP> from the closest recognized species of the genus <I>Paracoccus</I> , suggesting that this strain represents a novel species, for which the name <I>Paracoccus panacisoli</I> sp. nov. is proposed. The type strain is DCY94<SUP>T</SUP> ( = KCTC 42086<SUP>T</SUP> = JCM 30337<SUP>T</SUP>).</P>

A Dilute-and-Shoot LC–MS/MS Method for Screening of 43 Cardiovascular Drugs in Human Urine

Thuy-Vy Pham,Gunhee Lee,Xuan-Lan Mai,Thi-Anh-Tuyet Le,Thi-Ngoc-Van Nguyen,홍종기,Kyeong Ho Kim 사단법인 한국질량분석학회 2021 Mass spectrometry letters Vol.12 No.1

A simple, specific, and economical LC–MS/MS method was investigated for the screening of 43 prescribed antihy-pertensive and related drugs in human urine. The urine samples were simply prepared by diluting and mixing with internal stan-dard before directly introduced to the LC-MS/MS system, which is fast, straightforward, and cost-effective. Fractional factorial, Box-Behnken, and I-optimal design were applied to screen and optimize the mass spectrometric and chromatographic factors. The analysis was carried out on a triple quadrupole mass spectrometer system utilizing multiple reaction monitoring with posi-tive and negative electrospray ionization method. Chromatographic separation was performed on a Thermo Scientific Accucore RP-MS column (50 × 3.0 mm ID., 2.6 µm) using two separate gradient elution programs established with the same mobile phases. Chromatographic separation was performed within 12 min. The optimal method was validated based on FDA guideline. The results indicated that the assay was specific, reproducible, and sensitive with the limit of detection from 0.1 to 50.0 µg/L. The method was linear for all analytes with coefficient of determination ranging from 0.9870 to 0.9981. The intra-assay preci-sion was from 1.44 to 19.87% and the inter-assay precision was between 2.69 and 18.54% with the recovery rate ranges from 84.54 to 119.78% for all drugs measured. All analytes in urine samples were stable for 24 h at 25 o C, and for 2 weeks at -60 o C. The developed method improves on currently existing methods by including larger number of cardiovascular medications and better sensitivity of 12 analytes.

The impact of hyperandrogenism on the outcomes of ovulation induction using gonadotropin and intrauterine insemination in women with polycystic ovary syndrome

Ho, Vu Ngoc Anh,Pham, Toan Duong,Nguyen, Nam Thanh,Hoang, Hieu Le Trung,Ho, Tuong Manh,Vuong, Lan Ngoc The Korean Society for Reproductive Medicine 2022 Clinical and Experimental Reproductive Medicine Vol.49 No.2

Objective: This study aimed to investigate the impact of hyperandrogenism (HA) on the outcomes of ovulation induction (OI) using gonadotropin and intrauterine insemination (IUI) in patients with polycystic ovary syndrome (PCOS). Methods: This was a retrospective cohort study including 415 patients undergoing OI using gonadotropin and IUI treatment between January 2018 and December 2020 at a single infertility center. Baseline characteristics, clinical and laboratory parameters, and pregnancy outcomes were investigated. Results: Among the study population, there were 105 hyperandrogenic (25.3%) and 310 non-hyperandrogenic patients (74.7%). The live birth rate was lower in the HA group than in the non-HA group, but this difference did not reach statistical significance due to the limited sample size (14.3% vs. 21.0%, relative risk=0.68; 95% CI, 0.41-1.14, p=0.153). No predictive factors for live birth were identified through logistic regression analysis. Conclusion: HA did not negatively affect the outcomes of OI using gonadotropin and IUI cycles in Vietnamese women with PCOS. The result may not be applicable elsewhere due to the large variation in the characteristics of women with PCOS across races and populations.

Asbestos and Asbestos-related Diseases in Vietnam: In reference to the International Labor Organization/World Health Organization National Asbestos Profile

Van Hai Pham,Thi Ngoc Lan Tran,Giang Vinh Le,Mehrnoosh Movahed,Ying Jiang,Nguyen Ha Pham,Hisashi Ogawa,Ken Takahashi 한국산업안전보건공단 산업안전보건연구원 2013 Safety and health at work Vol.4 No.2

This paper describes progress on formulating a national asbestos profile for the country of Vietnam. The Center of Asbestos Resource, Vietnam, formulated a National Profile on Asbestos-related Occupational Health, with due reference to the International Labor Organization/World Health Organization National Asbestos Profile. The Center of Asbestos Resource was established by the Vietnamese Health Environment Management Agency and the National Institute of Labor Protection, with the support of the Australian Agency for International Development, as a coordinating point for asbestos-related issues in Vietnam. Under the National Profile on Asbestos-related Occupational Health framework, the Center of Asbestos Resource succeeded in compiling relevant information for 15 of the 18 designated items outlined in the International Labor Organization/World Health Organization National Asbestos Profile, some overlaps of the information items notwithstanding. Today, Vietnam continues to import and use an average of more than 60,000 metric tons of raw asbestos per year. Information on asbestos-related diseases is limited, but the country has begun to diagnose mesothelioma cases, with the technical cooperation of Japan. As it stands, the National Profile on Asbestos-related Occupational Health needs further work and updating. However, we envisage that the National Profile on Asbestos-related Occupational Health will ultimately facilitate the smooth transition to an asbestos-free Vietnam.