LIVIVO - Search results -

Search results

Result 1 - 10 of total 38

Search options

Article ; Online: Teaching English online at a center for foreign languages

Nguyen Quoc Hung Luu

Can Tho University Journal of Science, Vol 13, Iss

Challenges and opportunities

2021 Volume 1

Abstract: With the rapid development of technology for the past decades, online instruction has emerged as an alternative mode of teaching and learning and a substantial supplement to traditional teaching. At the Center for Foreign Languages, Can Tho University, ... ...

Abstract	With the rapid development of technology for the past decades, online instruction has emerged as an alternative mode of teaching and learning and a substantial supplement to traditional teaching. At the Center for Foreign Languages, Can Tho University, online teaching has been growing recently, particularly due to many schools’ closures because of the Covid-19 pandemic. This small-scale study was conducted with a group of online teachers of English of the Center for Foreign Languages with the aim to understand the teachers’ challenges as well as their opportunities to develop online courses. The results revealed that the primary challenge of online teaching was about technology impacts on both teachers and learners. There were also suggestions for both administrators and teachers for enhancing quality of online teaching.
Keywords	Challenges ; effectiveness ; online instruction ; quality ; teachers ; Social sciences (General) ; H1-99 ; Agriculture (General) ; S1-972 ; Engineering (General). Civil engineering (General) ; TA1-2040
Subject code	370
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	CAN THO UNIVERSITY PUBLISHING HOUSE
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Occurrence and Characteristics of Microplastics in Wild and Farmed Shrimps Collected from Cau Hai Lagoon, Central Vietnam

Tran Thi Ai My / Nguyen Duy Dat / Nguyen Quoc Hung

Molecules, Vol 28, Iss 4634, p

2023 Volume 4634

Abstract: This study investigated the occurrence of microplastics (MPs) in the gastrointestinal tracts (GT) and tissues of four common shrimps (including two wild-caught shrimps and two farmed shrimps) collected from a high-diversity lagoon in central Vietnam. The ...

Abstract	This study investigated the occurrence of microplastics (MPs) in the gastrointestinal tracts (GT) and tissues of four common shrimps (including two wild-caught shrimps and two farmed shrimps) collected from a high-diversity lagoon in central Vietnam. The numbers of MP items in greasy-back shrimp ( Metapenaeus ensis ), green tiger shrimp ( Penaeus semisulcatus ), white-leg shrimp ( Litopenaeus vannamei ), and giant tiger shrimp ( Penaeus monodon ), determined per weight and individual, were 0.7 ± 0.3, 0.6 ± 0.2, 1.1 ± 0.4, and 0.5 ± 0.3 (items/g-ww), and 2.5 ± 0.5, 2.3 ± 0.7, 8.6 ± 3.5, 7.7 ± 3.5 (items/individual), respectively. The concentration of microplastics in the GT samples was significantly higher than that in the tissue samples ( p < 0.05). The number of microplastics in the farmed shrimp (white-leg shrimp and black tiger shrimp) was statistically significantly higher than the number of microplastics in the wild-caught shrimp (greasy-back and green tiger shrimps) ( p <0.05). Fibers and fragments were the dominant shapes of the MPs, followed by pellets, and these accounted for 42–69%, 22–57%, and 0–27% of the total microplastics, respectively. The chemical compositions determined using FTIR confirmed six polymers, in which rayon was the most abundant polymer, accounting for 61.9% of the MPs found, followed by polyamide (10.5%), PET (6.7%), polyethylene (5.7%), polyacrylic (5.8%), and polystyrene (3.8%). As the first investigation on the MPs in shrimps from Cau Hai Lagoon, central Vietnam, this study provides useful information on the occurrences and characteristics of the microplastics in the gastrointestinal tracts and tissues of four shrimp species that live in different living conditions.
Keywords	gastrointestinal tract ; tissue ; microplastics ; wild-caught shrimps ; farmed shrimps ; Organic chemistry ; QD241-441
Subject code	910
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Teachers’ motivation and its influence on quality education

Nguyen Quoc Hung Luu

Can Tho University Journal of Science, Vol 12, Iss

A study at a center for foreign languages in Vietnam

2020 Volume 3

Abstract: Teacher is one of the most important elements in education. The quality of education is largely determined by the teacher’s quality. Few would argue against the view that motivated staff are a central resource for the success and quality of an ... ...

Abstract	Teacher is one of the most important elements in education. The quality of education is largely determined by the teacher’s quality. Few would argue against the view that motivated staff are a central resource for the success and quality of an organization, and thus attention needs to be given to examining teachers’ motivation as a key to guaranteed quality education. At the Center of Foreign Languages, Can Tho University, teachers are always recognized as key factors for the success of the institution. This small-scale study was conducted with 42 teachers of English of the Center for Foreign Languages with the aim to examine common factors affecting teachers’ motivation and their perceptions towards quality education. The results of the survey revealed the most common factors for teachers’ motivation and the findings from focus group discussions indicated the positive relationship of teachers’ level of motivation with quality education.
Keywords	motivation ; performance ; quality education ; teachers ; Social sciences (General) ; H1-99 ; Agriculture (General) ; S1-972 ; Engineering (General). Civil engineering (General) ; TA1-2040
Subject code	370
Language	English
Publishing date	2020-11-01T00:00:00Z
Publisher	CAN THO UNIVERSITY PUBLISHING HOUSE
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Teachers’ professional development as a tool to enhance institutional quality

Nguyen Quoc Hung Luu

Can Tho University Journal of Science, Vol 12, Iss

Current practices at a center for foreign languages

2020 Volume 1

Abstract: In this incredibly challenging and complex world, many teaching professionals require continuous learning and support, or professional development. Teachers are always recognized as key players in the education system and therefore professional ... ...

Abstract	In this incredibly challenging and complex world, many teaching professionals require continuous learning and support, or professional development. Teachers are always recognized as key players in the education system and therefore professional development of these teachers is crucial if the quality of education is to be enhanced. At a center for foreign languages in Vietnam, professional development activities are always encouraged. Annually, teachers of every level are required to attend certain workshops and structured training and learning sessions, and their participation in these activities are necessary for their performance evaluation related to teaching contracts and pay for performance. The current study has been undertaken with 51 teachers of English at the Center for Foreign Languages in Can Tho University, Vietnam. An online survey was administered to assess the teachers’ perceptions of the effectiveness of the professional development activities and of the influence of these activites on quality of education. After three years of implementation, these programs of professional development have gained initial positive results. There is an increasing number of teachers who have gained necessary language competency and teaching qualifications. Through practical and effective activities such as implementing a new set of curriculum materials, professional discussions, attending workshops or seminars, teachers have taken up opportunities for further academic growth and consequently could enhance the quality of education. From the current practices there are important implications. When educational leaders and managers need to enhance the institutional quality, they should provide appropriate teachers’ professional development programs.
Keywords	effectiveness ; performance ; professional development ; quality ; Social sciences (General) ; H1-99 ; Agriculture (General) ; S1-972 ; Engineering (General). Civil engineering (General) ; TA1-2040
Subject code	370
Language	English
Publishing date	2020-03-01T00:00:00Z
Publisher	CAN THO UNIVERSITY PUBLISHING HOUSE
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Structural and functional features of asthma participants with fixed airway obstruction using CT imaging and 1D computational fluid dynamics: A feasibility study.

Nguyen, Quoc Hung / Kim, So Ri / Chae, Kum Ju / Jin, Gong Yong / Choi, Sanghun

Physiological reports

2024 Volume 12, Issue 1, Page(s) e15909

Abstract: Asthma with fixed airway obstruction (FAO) is associated with significant morbidity and rapid decline in lung function, making its treatment challenging. Quantitative computed tomography (QCT) along with data postprocessing is a useful tool to obtain ... ...

Abstract	Asthma with fixed airway obstruction (FAO) is associated with significant morbidity and rapid decline in lung function, making its treatment challenging. Quantitative computed tomography (QCT) along with data postprocessing is a useful tool to obtain detailed information on airway structure, parenchymal function, and computational flow features. In this study, we aim to identify the structural and functional differences between asthma with and without FAO. The FAO group was defined by a ratio of forced expiratory volume in 1 s (FEV
MeSH term(s)	Humans ; Feasibility Studies ; Hydrodynamics ; Asthma/complications ; Asthma/diagnostic imaging ; Airway Obstruction/diagnostic imaging ; Tomography, X-Ray Computed
Language	English
Publishing date	2024-01-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	2724325-4
ISSN	2051-817X ; 2051-817X
ISSN (online)	2051-817X
ISSN	2051-817X
DOI	10.14814/phy2.15909
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article: Analytical techniques for determination of heavy metal migration from different types of locally made plastic food packaging materials using ICP-MS.

Nguyen, Van-Trong / Linh, Truong Thi Truc / Vo, The-Ky / Nguyen, Quoc Hung / Van, Thanh-Khue

Food science & nutrition

2023 Volume 11, Issue 7, Page(s) 4030–4037

Abstract: Plastic food packaging is an essential element for customer convenience and the preservation of food quality. Nonetheless, heavy metals in the packaging materials, either intentionally or nonintentionally added, can be transferred to the food. Therefore, ...

Abstract	Plastic food packaging is an essential element for customer convenience and the preservation of food quality. Nonetheless, heavy metals in the packaging materials, either intentionally or nonintentionally added, can be transferred to the food. Therefore, determining heavy metal contents in these packaging materials is essential. In this study, heavy metals, including Co, Ge, As, Cd, Sb, Pb, Al, and Zn from different intrinsic plastic food packaging materials were analyzed using the inductively coupled plasma-mass spectrometry (ICP-MS) method. Moreover, the migration of these elements into the environment was also investigated. This method is validated following the new technique's requirements, which include linearity range, accuracy, precision, the limit of detection (LOD), and the limit of quantitation (LOQ). The method has been suitably validated with the regression equation from the standards prepared in HNO
Language	English
Publishing date	2023-05-11
Publishing country	United States
Document type	Journal Article
ZDB-ID	2703010-6
ISSN	2048-7177
ISSN	2048-7177
DOI	10.1002/fsn3.3391
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Chemical composition and antibacterial activities of essential oils from rhizomes and aerial parts of Homalomena cochinchinensis (Araceae)

Van, Hong Thien / Le, Nhat Tam / Huynh, Nguyen Tuong An / Vo, Huy Sang / Le, Thanh Tho / Van Chu, Hai / Truong, Huynh Anh Vu / Nguyen, Quoc Hung

Natural product research. 2022 June 15, v. 36, no. 12

2022

Abstract: In this study, the phytochemical composition and antibacterial activity of the essential oils isolated from the rhizomes and the aerial parts of Homalomena cochinchinensis were analysed for the first time using gas chromatography-mass spectrometry (GC-MS) ...

Abstract	In this study, the phytochemical composition and antibacterial activity of the essential oils isolated from the rhizomes and the aerial parts of Homalomena cochinchinensis were analysed for the first time using gas chromatography-mass spectrometry (GC-MS) and disk diffusion method. Consequently, 36 constituents were reported from H. cochinchinensis rhizomes, including linalool (57.4%), terpinen-4-ol (10.6%), α-sabinene (4.2%) as major compounds. Meanwhile, 30 compounds have been identified in the essential oil of the aerial parts of H. cochinchinensis, which myrcene (41.1%), sabinene (8.2%), D-limonene (9.1%) were the main constituents. Furthermore, the antibacterial activity of the essential oil from the rhizomes of the studied species could inhibit the growth of all six tested bacterial strains, including Bacillus cereus, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella enteritidis and Salmonella typhimurium whereas the essential oil from the aerial parts was proved to be able to inhibit the growth of five bacterial strains except S. enteritidis.
Keywords	Bacillus cereus ; Escherichia coli ; Homalomena ; Pseudomonas aeruginosa ; Salmonella Enteritidis ; Salmonella Typhimurium ; Staphylococcus aureus ; antibacterial properties ; chemical composition ; chemical constituents of plants ; disk diffusion antimicrobial test ; essential oils ; gas chromatography-mass spectrometry ; limonene ; linalool ; myrcene ; research ; sabinene
Language	English
Dates of publication	2022-0615
Size	p. 3129-3132.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	2185747-7
ISSN	1478-6427 ; 1478-6419
ISSN (online)	1478-6427
ISSN	1478-6419
DOI	10.1080/14786419.2021.1939333
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: A high-performance method for quantitation of aflatoxins B1, B2, G1, G2: Full validation for raisin, peanut matrices, and survey of related products at Ho Chi Minh City.

Nguyen, Thanh Duy / Nguyen, Thuy Ngan Ha / Ly, Tuan Kiet / Nguyen, Quoc Hung / Le, Thanh Tho / Chu, Van Hai / Nguyen, Tien Dat / Le, Dinh Vu

Food science & nutrition

2023 Volume 11, Issue 10, Page(s) 6509–6521

Abstract: Optimization and validation for simultaneous quantitation of four aflatoxins B1, B2, G1, and G2 in peanuts and raisins were performed on ultra-performance liquid chromatography in a combination of fluorescence detector, without derivatization. The ... ...

Abstract	Optimization and validation for simultaneous quantitation of four aflatoxins B1, B2, G1, and G2 in peanuts and raisins were performed on ultra-performance liquid chromatography in a combination of fluorescence detector, without derivatization. The advantages were short analysis time, simple sample handling, and reduced solvent consumption. Instrument detection limits of AFB1, AFB2, AFG1, and AFG2 were 0.07, 0.01, 0.1, and 0.008 μg/kg, respectively, lower than those obtained by LCMSMS and HPLC-FLD with derivatization. Two solvent mixtures were chosen for two different matrices whose matrix effect was not negligible (2.81%-8.04% for peanuts and 5.63%-11.43% for raisins). The linear ranges were from 0.2 to 20 μg/L for AFB1 and AFG1 and from 0.05 to 5 μg/L for AFB2 and AFG2. The limits of detection and quantification were 0.025-0.1 and 0.075-0.3 μg/kg for peanuts and raisins, respectively. Recoveries at three other concentrations from 0.75 to 125 μg/kg of total aflatoxins were obtained between 76.5% and 99.8% (with RSD < 6%) following the
Language	English
Publishing date	2023-08-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	2703010-6
ISSN	2048-7177
ISSN	2048-7177
DOI	10.1002/fsn3.3594
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Evaluation of microplastic removal efficiency of wastewater-treatment plants in a developing country, Vietnam

Le, Thi-Minh-Tam / Truong, Tran-Nguyen-Sang / Nguyen, Phuoc-Dan / Le, Quang-Do-Thanh / Trần, Quốc Việt / Le, Thanh-Tho / Nguyễn, Quốc Hùng / Kieu-Le, Thuy-Chung / Strady, Emilie

Environmental Technology & Innovation. 2023 Feb., v. 29 p.102994-

2023

Abstract: Wastewater-treatment plants (WWTPs) are considered significant point sources of microplastics (MiP) in the receiving waters; MiP release is poorly estimated in developing countries. MiP abundance, recovery efficiency and daily load to receiving waters ... ...

Abstract	Wastewater-treatment plants (WWTPs) are considered significant point sources of microplastics (MiP) in the receiving waters; MiP release is poorly estimated in developing countries. MiP abundance, recovery efficiency and daily load to receiving waters were explored in treatment stage facilities of four WWTPs in Vietnam, located in Ho Chi Minh City, Thu Dau Mot, and Da Lat. MiP abundance varied from 1860 items m⁻³ to 125,000 items m−3 in influents and between 140 items m⁻³ and 813 items m⁻³ in the final effluents. The MiP-removal efficiency was the highest in the Da Lat wastewater-treatment plant (DL WWTP), a tertiary treatment plant using trickling filters followed by aerated lagoon and maturation ponds for BOD and nitrogen removals. The lowest MiP-removal efficiency was observed in Binh Hung wastewater-treatment plant (BH WWTP), a combined sewer system using conventional activated sludge processes as secondary treatment. The total daily MiP load to the receiving environment varied from 1,840,000 items d⁻¹ at the DL WWTP to 77,127,000 items d⁻¹ at the BH WWTP. Change in MiP abundance, morphology, and removal efficiency were discussed after each stage of the treatment process for the four WWTPs.
Keywords	activated sludge ; microplastics ; nitrogen ; sewer systems ; wastewater treatment ; Vietnam ; Wastewater-treatment plant ; Retention efficiency ; CAS ; SBR
Language	English
Dates of publication	2023-02
Publishing place	Elsevier B.V.
Document type	Article ; Online
Note	Use and reproduction
ISSN	2352-1864
DOI	10.1016/j.eti.2022.102994
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Metal-Organic Frameworks Reinforce the Carbon Nanotube Sponge-Derived Robust Three-Dimensional Sulfur Host for Lithium-Sulfur Batteries.

Nguyen, Quoc Hung / Luu, Van Tung / Lim, Sung Nam / Lee, Young-Woo / Cho, Younghyun / Jun, Yun-Seok / Seo, Min Ho / Ahn, Wook

ACS applied materials & interfaces

2021 Volume 13, Issue 24, Page(s) 28036–28048

Abstract: Sulfur is a prospective material for next-generation batteries with high theoretical capacity, but its drawbacks hinder its commercialization. To overcome the low conductivity of natural sulfur and the shuttle effect of lithium polysulfide, the study ... ...

Abstract	Sulfur is a prospective material for next-generation batteries with high theoretical capacity, but its drawbacks hinder its commercialization. To overcome the low conductivity of natural sulfur and the shuttle effect of lithium polysulfide, the study proposes a novel sulfur film coated with three-dimensional nitrogen and cobalt-codoped polyhedral carbon wrapped on a multiwalled carbon nanotube sponge (3D-S@NCoCPC sponge) composite as a high-performance cathode material for rechargeable lithium-sulfur batteries. The interconnected conductive carbon network with abundant pores provides more room for the homogeneous distribution of sulfur within the composite and creates a favorable pathway for electrolyte permeability and lithium-ion diffusion. Moreover, the strong interaction between cobalt and lithium polysulfides leads to efficient suppression of the shuttle effect. In addition, the homogeneous distribution of sulfur and cobalt within the composite enhances electronic transfer for the conversion reaction of sulfur. As expected, the cathode with a high sulfur content of 77.5 wt % in the composite achieved a high initial discharge capacity of 1192 mA h g
Language	English
Publishing date	2021-06-11
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.1c03054
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED