CTU Journal of Science

Khung điểm Tạp chí Khoa học Đại học Cần Thơ năm 2025

Ngày 11/7/2025, Hội đồng Giáo sư Nhà nước đã ban hành Quyết định số 26/QĐ-HĐGSNN phê duyệt danh mục tạp chí khoa học được tính điểm của 28 Hội đồng Giáo sư ngành, liên ngành năm 2025. Theo đó, Tạp chí Khoa học Đại học Cần Thơ (https://ctujsvn.ctu.edu.vn/) được phê duyệt trong danh mục tạp chí khoa học được tính điểm của 20 Hội đồng Giáo sư ngành, liên ngành năm 2025. Trong đó, Tạp chí được 1 Hội đồng công nhận mới và 2 Hội đồng nâng điểm.

Research on the application of supercapacitors for starting a motorcycle

Nguyen Khac Bang, Phan Tan Tai*
Abstract | PDF (Tiếng Việt)
This study aims to find a solution to apply supercapacitors to store electrical energy on motorcycles instead of batteries to start electricity for motors, signal lights, etc. Supercapacitors have the advantages of fast charging and discharging, high altitude, and environmental friendliness. The study presents a calculation plan and design of a set of 6 supercapacitors of 350 F – 2.7 V to replace the battery to start the motorcycle engine, with a charging time 50 times faster, engine start times reach 5 to 10 times (each time 3 seconds), and the weight is 5.6 times lighter than the battery. The experimental results show that using supercapacitors to replace batteries to start motorbikes is completely feasible.

Investigating Flavonoids and biological activities of Curcuma aromatica Salisb extracts

Nguyen Thi Bich Thuyen*, Cao Luu Ngoc Hanh, Huynh Lien Huong, Vo Quoc Thai
Abstract | PDF (Tiếng Việt)
In this study, the raw material is white turmeric (Aromatica Salisb extracts) grown and harvested in the Prong Pak district, Dak Lak province. The material powder is extracted with 4 solvents (ethyl acetate, ethanol, acetone, and petroleum ether) using the soaking method to obtain the corresponding extracts. Then, the extract with the highest flavonoid content was determined for biological activities, including antioxidant, microorganisms, and anti-inflammatory activities. The results of investigating antioxidant activity using the DPPH method showed that white turmeric extract exhibited the ability to resist DPPH free radicals with an IC50 value = 837.06 ± 1.34 µg.mL-1. Results of investigating the antibacterial activity of white turmeric extract using the agar plate diffusion method showed that the extract displayed the ability to inhibit 7 types of pathogenic microorganisms. However, white turmeric extract had weak anti-inflammatory properties.

Design and development of an automotive vehicles model for transporting and managing goods in warehouses

Tran Thuan-Tien, Tra Quoc-Thanh, Tran Nguyen Phuong Lan, Nguyen Chi Ngon, Huynh Quoc-Khanh*
Abstract | PDF (Tiếng Việt)
In the context of the Fourth Industrial Revolution, this study focuses on the design and development of an autonomous vehicle model for warehouse operations, with the goal of automating material handling and inventory management, thereby enhancing operational efficiency and optimizing operating costs. The system uses the D-DWM-PG3.6 WiFi module for vehicle positioning. The model is tested in a laboratory space of 100 m² and is capable of transporting small items with a maximum size of 20 × 20 cm. The movement trajectory is defined using a two-dimensional coordinate system. After more than 50 trials, the results show an accuracy with an approximate error of 10.4±5.1 cm compared to the desired trajectory. In addition, a mobile application was developed to control the vehicle and manage orders in real time. The results indicate that the system contributes to improving warehouse operation processes. However, the surveyed area should be further expanded in future studies to accommodate larger warehouses.

Application of static and real-time kinematic GNSS methods in monitoring deck displacement of cable-stayed bridge structure

Nguyen Viet Ha, Vu Ngoc Quang*
Abstract | PDF (Tiếng Việt)
The paper analyses the monitoring performance of a cable-stayed bridge using the Global Navigation Satellite System with post-processed static and real-time kinematic methods utilising a Topcon MR2 receiver. Data is collected from a monitoring antenna on a stayed cable bridge for 9 days from 21/07/2022 to 29/07/2022, with 216 static observations, one-hour sessions. Regarding the real-time kinematic method, the study uses 86400 one-second interval observations. The analysis results indicate that the static measurement exhibits significantly more minor fluctuations than the real-time kinematic measurement method, both over one day and when averaged over one-hour intervals. In terms of trend, both methods exhibit the same overall trend. Specifically, the smallest oscillations are observed in the transverse direction of the bridge, followed by the longitudinal direction, with the largest oscillations occurring in the vertical direction.

A study on a dual-axis solar tracking system utilizing Arduino-based control

Nguyen Thai Son*, Nguyen Thai Hoa, Nguyen Tran Dang Khoa, Tang Thanh Tinh, Nguyen Van Ngay, Nguyen Thi Hong Bich, Quach Ngoc Thinh, Tran Trung Tinh
Abstract | PDF (Tiếng Việt)
Currently, the global demand for renewable energy is increasing significantly, particularly solar energy, which has garnered considerable attention. However, the energy harvesting capability of solar panels remains suboptimal when positioned in a fixed location. To address this issue, numerous studies have developed dual-axis tracking mechanisms for solar panels, enabling the adjustment of the panel's tilt angle to follow the direction of sunlight. As a result, the panel automatically rotates to maximize the harvested energy. This study focuses on evaluating the power output of a dual-axis solar tracking system implemented at the Faculty of Electrical Engineering, Can Tho University, using an Arduino microcontroller to receive signals from light-dependent resistors (LDRs), process the signals, and control the motors to rotate the panel to the position that achieves the highest power output. Experimental results indicate that the power output of the dual-axis solar tracking system is approximately 22% higher on average compared to a fixed solar system.

Establishing an anti-aging cream formula from black turmeric extract

Nguyen Thi Bich Thuyen*, Ho Quoc Phong, Nguyen Viet Nhan Hoa
Abstract | PDF (Tiếng Việt)
Black turmeric is harvested in My Xuyen district, Soc Trang province, washed, dried, ground, and extracted with ethyl acetate. The extract was studied for 12 anti-aging cream formulations using the emulsification method. The cream sample with the best parameters is continuously evaluated for quality criteria according to the cosmetic management regulations of the Ministry of Health and sensory assessments. The results show that the cream meets the quality requirements according to the cosmetic management regulations of the Ministry of Health and consumers.

State estimation using an Extended Kalman Filter for permanent magnet synchronous generator–based wind turbines

Nguyen Lam, Nguyen Hoa Minh*
Abstract | PDF (Tiếng Việt)
Wind turbines are complicated, nonlinear, and time-varying dynamical systems. Therefore, the supervision and control of wind turbines require the measurement of a wide range of sensors, which are expensive in investment and maintenance. As a result, numerous estimation approaches have been proposed for wind turbine control systems in order to reduce the use of physical sensors. This paper presents a study of state estimation for Permanent Magnet Synchronous Generator (PMSG)-based wind turbines. The state estimator has been developed based on the Extended Kalman Filter (EKF) principles applied to nonlinear systems. The constructed state estimator has been applied and simulated in two operation scenarios of wind turbines: fixed and variable system parameters. The simulation results show that the estimator is able to converge for both scenarios.

Evaluation of manganese removal efficiency in solution using filtration materials supplemented with NaClO

Do Thi My Phuong, Bui Minh Tri, Do Minh Chau, Phan Thi Thanh Tuyen, Nguyen Xuan Loc*
Abstract | PDF (Tiếng Việt)
Manganese (Mn2+) contamination in domestic water in Vietnam exceeds permissible limits, posing negative impacts on public health. This study aims to evaluate the effectiveness of Mn²⁺ removal using filtration, combined with the oxidative support of NaClO. Experiments were conducted on a laboratory-scale filter column using synthetic Mn2+-contaminated water and three filter media: quartz sand, manganese sand, and zeolite. Investigated parameters included initial Mn2+ concentration (5 – 25 mg/L), NaClO concentration and volume (2 – 10 mg/L, 2 – 10 mL), reaction time (1 – 8 hours), at pH 7 ± 0.2 and temperature ~25°C. Mn2+ concentration was analyzed according to TCVN 6002:1995 using a colorimetric method with formaldoxime. Results showed that zeolite had the highest removal efficiency (97.7% without NaClO; 99.8% with NaClO) due to its catalytic formation of MnOx on the surface. Post-treatment Mn2+ concentrations were below 0.1 mg/L, meeting QCVN 01-1:2018/BYT standards. NaClO contributed to enhanced treatment efficiency, affirming its practical potential in domestic water treatment systems.

Recovery and approximations of functions by linear methods in Besov spaces having mixed smoothness

Nguyen Manh Cuong*
Abstract | PDF (Tiếng Việt)
This paper studies recovery and approximation of functions in the Besov spaces with mixed smoothnesss. We construct linear sampling recovery methods of functions in the Besov spaces, and evaluate the asymptotic behavior of the method. The main result of the paper is to extend and generalize the previous results.

Study on the fabrication of membrane distillation for treatment and reuse of textile wastewater

Nguyen Thi Hau, Huynh Thanh Truc, Nguyen Thi Thu Uyen, Mai Thi Nguyet, Nguyen Thi Lien, Vo Thi Hoang My, Le Quang Huy, Nguyen Cong Nguyen*
Abstract | PDF (Tiếng Việt)
This study explores the potential of membrane distillation (MD) technology as a one-step process for treating and reusing dye textile wastewater. The research synthesizes MD membranes using a novel H2O/Isoamyl alcohol non-solvent in phase inversion with varying ratios to enhance hydrophobicity, thermal stability, and evaluate water flux and dye removal efficiency. Results showed that the optimal MD membrane, with a 50:50 H2O/Isoamyl alcohol ratio, achieved high water flux (18.05 L/m2 h) and color removal efficiency (99.69%), along with a water recovery of 60.35% after 16 hours of operation. Additionally, the synthesized MD membrane demonstrated approximately 1,3 times higher water flux than the commercial MD membrane due to its greater porosity. The results demonstrated that isoamyl alcohol can improve the long-term performance of MD membranes, offering a sustainable solution for dye recovery and wastewater treatment in the textile industry by utilizing waste heat from dyeing wastewater.  Overall, the synthesized MD membrane shows promise as an effective solution to address dye wastewater treatment challenges in Bao Loc's textile sector.

Composite oil/water emulsion system based on grapefruit essential oil for application in cosmetics

Nguyen Viet Nhan Hoa, Nguyen Thi Yen Nhi, Lam Thi My Anh, Do Thi Kim Cuong, Vo Thi Tuyet Anh, Tran Le Hoa Trinh, Nguyen Cuong Quoc, Nguyen Duy Tuan*
Abstract | PDF (Tiếng Việt)
Oil/water (O/W) microemulsions based on essential oil extracted from Nam Roi grapefruit peel were successfully synthesized by the ultrasonic vibration method and Tween 80 as an emulsifier. In this study, the effect of the volume ratio of components such as tween 80, distilled water, and essential oil on the stability of the microemulsion system was investigated. In addition, the stable emulsions were also evaluated for antibacterial and fungal activity, sensory appearance, and skin irritation level. The results showed that 9 out of 27 emulsions were stable for more than 60 days at room temperature with an average size measured by DLS of about 6.28 - 13.46 μm. The stable emulsion with 2% (v/v) essential oil concentration did not show antibacterial and fungal activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Candida albicans. The stable samples gave good sensory results and were safe for the skin.

Preliminary data on the morphological characteristics of peripheral blood cells in the bumblebee catfish Pseudomystus siamensis (Regan, 1913)

Tran Thi Anh Thu*, Le Phuoc Lam, Tran Chi Bao, Nguyen Thi Thuy Hang, Lam Hai Dang, Nguyen Trong Hong Phuc
Abstract | PDF (Tiếng Việt)
The Asian bumblebee catfish (Pseudomystus siamensis) is a freshwater fish species of high economic value in the Mekong Delta.  However, it is being overfished that is leading to a decline in natural resources. The purpose of this study is to investigate the morphological characteristics of peripheral blood cells of the Asian bumblebee catfish, contributing to the database for research, aquaculture, and monitoring the health status of this species. Fish purchased from floating farms in Con Son, Can Tho city. Blood samples were collected from the caudal vein and stained with Giemsa. The results showed that the peripheral blood of P. siamensis included oval-shaped erythrocytes with a typical oval nucleus; spindle-shaped thrombocytes with a round or oval nucleus; monocytes with a kidney-shaped nucleus and vacuoles in the cytoplasm; lymphocytes with an oval nucleus and cell membrane extending into pseudopods; neutrophils with a large horseshoe-shaped nucleus; spherical eosinophils, segmented, rod-shaped nucleus. Basophils were very few, spherical, with large oval or segmented, rod-shaped nucleus.

Efficacy of Terminalia catappa and Nelumbo nucifera extracts in reducing oxidative stress and enhancing resistance to pathogenic bacteria in ornamental fish

Thi Hoa Rol, Doan Minh Phung, Dinh Thi thuy, Tran Ngoc Quoc Tuong, Tran Pham Vu Linh, Nguyen Trong Nghia, Nguyen Thanh Vu*
Abstract | PDF (Tiếng Việt)
This study evaluated the efficacy of Terminalia catappa and Nelumbo nucifera extracts in reducing oxidative stress and enhancing resistance against Edwardsiella ictaluri infection in ornamental fish. Methods included 70% ethanol extraction, determination of safe concentrations (SC), blending at various ratios, and assessment of antioxidant (via H₂O₂) and antibacterial activities on three common ornamental fish species (Danio rerio, Melanotaeniidae, and Gymnocorymbus ternetzi). Results showed that the SCs of T. catappa and N. nucifera extracts were 100 µg/mL and 75 µg/mL, respectively. A 75:25 blend (T. catappa : N. nucifera) achieved survival rates over 80% under oxidative stress conditions and over 40% upon E. ictaluri infection. Total phenolic and flavonoid contents of the blend were 458.34 ± 25.34 mg GAE/g and 332.41 ± 19.21 mg QE/g, respectively, surpassing those of individual extracts. These findings highlight the potential of this herbal blend as an alternative to reduce antibiotics usage in ornamental aquaculture, contributing to sustainable and safe fish farming practices.

Evaluation of the anti-aging effects of FGF-2 formulation on aging mouse model and orientation for developing skin rejuvenation cosmetics

Nguyen Trong Binh*, Pham Thi Vang
Abstract | PDF (Tiếng Việt)
Skin aging is increasingly common, primarily due to factors such as aging, ultraviolet exposure, and sunlight. Fibroblast Growth Factor-2 (FGF-2) is a multifunctional protein that has garnered interest for its potential role in both preventing and treating skin aging. A study was conducted using an aging mouse model to investigate FGF-2's effects. After three weeks of treatment with 5 ng and 25 ng of FGF-2, the results showed several improvements: the skin surface became smoother, pigmentation diminished, the number of wrinkles decreased, skin elasticity was restored, and there was an increase in collagen and fibroblast proliferation. Hair follicle cell growth was also observed, and these findings were comparable to the results seen in the normal control group of mice. In contrast, no improvements were noted in the skin of the aging group that was treated with physiological saline.

Selection and Identification of Fructophilic Lactic Acid Bacteria with some probiotic properties

Huynh Ngoc Thanh Tam, Tran Vu Phuong, Huynh Yen Nhi*
Abstract | PDF (Tiếng Việt)
In order to explore new probiotic sources, this study investigated the potential of fructose-loving lactic acid bacteria (FLAB) from bee wax. From 15 isolated bacterial strains, AG1.4 strain was identified as the most promising probiotic strain. AG1.4 was classified under the Lactiplantibacillus group with 100% similarity. This strain demonstrated a high adhesion ability to solvents, reaching 91.65%, and exhibited strong antibacterial activity against E. coli and S. aureus, with inhibition zones measuring 12.67 mm and 14.33 mm, respectively. Additionally, AG1.4 showed resistance to all three antibiotics: ampicillin (10 µg/mL), tetracycline (30 µg/mL), and ofloxacin (10 µg/mL), and it was the only strain capable of simultaneously degrading starch, protein, and cellulose. The ability to utilize fructose and the unique biological properties provided by strain AG1.4 open new avenues for the development of novel functional fermented products, diversifying probiotic sources, ensuring food safety, and enhancing the nutritional value for humans.

Research on the development of mango-flavored fruit jelly (Mangifera indica L.) with hydrolyzed collagen supplement from tra catfish skin (Pangasianodon hypophthalmus)

Le Thi Minh Thuy*, Truong Thi Mong Thu
Abstract | PDF (Tiếng Việt)
Research on the main technology factors, such as thickeners concentration, hydrolyzed collagen concentration, and cold preservation time for mango-flavored fruit jelly supplemented with hydrolyzed collagen from tra catfish skin with the highest quality, was investigated. The results of the evaluation showed that agar at a concentration of 1.2% agar had good elasticity of 319 g, b*= 29.9, and the highest sensory score of 18.7 points. When combining with gelatin at a concentration of 0.6%, the product reached an appropriate elasticity of 318 g, b*=29.5, and the best sensory quality was 18.6 points. Hydrolyzed collagen at the concentration of 1% improved the antioxidant activity up to 81.9%, while maintaining the elasticity, color and the highest sensory score is 18.6 points. The product was packaged and stored at cold temperature (0-4℃) to still ensure quality and microbiological safety for 4 weeks.

Survey of current status of longan cultivation and soil microbial respiration in long-term longan cultivated orchard soil in Long Ho district, Vinh Long province

Nguyen Minh Phuong, Do Thanh Luan, Le Thi Xa, Nguyen Khoi Nghia*
Abstract | PDF (Tiếng Việt)
The study aimed to survey the current status of longan cultivation and soil microbial respiration of over 15 years old longan in Long Ho district, Vinh Long, with 30 Xuong Com Vang longan growing households. Soil microbial respiration was determined by measuring CO₂ accumulated over time. The results showed that the average planting density was 260 trees/ha. The average amount of inorganic fertilizer applied was 1150 - 874 - 860 g N- P2O5-K2O/tree/year, with a nitrogen dose higher than the recommended level, causing nutrient imbalance. The average organic fertilizer applied was 8.39 kg/tree/year. The average longan yield was 13.2 tons/ha/year, with differences between gardens due to differences in cultivation conditions and nutrient management. The respiration rate of soil microorganisms varied significantly between the surveyed farms. The respiration rate was highest in the group of soil with beds aged 15 - 25 years, and lowest in the group aged 46 - 60 years. This result showed a decline in soil microbial activity over cultivation time.

Survey of native plants in saline land with potential for application of landscape decorating in Thanh Phu - Ben Luc - Long An

Pham Thi Bich Phuong*, Vu Thanh Hai
Abstract | PDF (Tiếng Việt)
This study presents the results of a survey of plants in saline soil, which has potential applications in landscape decoration in the Thanh Phu - Ben Luc - Long An area. The investigation identifies the names of plant species, measures growth indicators, flower and fruit characteristics, and evaluates the applicability of native plants in landscape decoration. The survey results show that 46 species grow well and suitably in the natural conditions of the study area; 26/46 species have been used in landscape decoration, 20/46 species of wild are estimated at suitable for landscape decoration application; And propose the direction of use of 46 species in landscape decoration based on the functional zoning of the ecological urban area.

Digital transformation in OCOP agricultural business in Tien Giang: Current situation, challenges, and solutions

Tran Lam Duy*
Abstract | PDF (Tiếng Việt)
Digital transformation (DT) in OCOP business in Tien Giang is an inevitable trend that enhances product value and expands markets. This study evaluates the level of digital technology adoption, identifies barriers, and proposes solutions to promote DT in connection with rural development. A survey of 70 OCOP entities (with a 43.8% response rate) shows that 67.1% combine online and traditional sales channels, and 77.2% acknowledge that DT improves their operations. The main challenges include limited technological skills (40%), lack of time (32.9%), and insufficient information on policy support (nearly 60% have not taken advantage of it). Although 90% rate internet infrastructure as average or better, only 17.2% regularly use TikTok Shop or Shopee, yet 88.6% intend to do so. Accordingly, the study recommends prioritizing digital skills training, strengthening policy communication, and improving technology infrastructure, thereby enhancing the competitiveness of OCOP entities and fostering sustainable rural economic development.

Effects of pre-harvest spray of Brassinolide on the yield and fruit quality improvement of Hong mandarin (Citrus recticulata Blanco)

Trinh Xuan Viet, Tran Ngoc Quy, Pham Thi Phuong Thao, Le Van Hoa, Nguyen Van Ay*
Abstract | PDF (Tiếng Việt)
The study determines the appropriate concentration and timing of pre-harvest Brassinolide application to improve the yield and fruit quality of quyt Hong. The experiment was arranged in a completely randomized design with two factors: (A) Brassinolide concentrations ; (B) number of applications. The solution was sprayed evenly over the canopy until both leaves and fruits were completely wet (approximately 6 liters per tree), applied in the late afternoon, while the control treatment received water only. The results showed that pre-harvest Brassinolide application significantly improved several parameters related to yield and fruit quality, including total soluble solids (°Brix), peel color, and the incidence of segment-end drying. Among the treatments, the application of Brassinolide at 1 ppm with two sprays at 113 and 105 days before harvest produced the best results, increasing fruit weight (61.54 ± 0.10 g) and total yield (67.70 ± 0.11 tons/ha), while markedly reducing the rate of segment-end drying. Furthermore, Brassinolide treatment at this concentration helps increase some fruit quality indicators (Brix level of fruit flesh: 13.47%; Percentage of dry fruit at the tip of the segment: 6.49±0.02%; Ratio of dry segments/fruit: 5.74±0.02%; Ratio of dry segment length: 2.88±0.02%), contributing to increasing attractiveness in consumption.

Isolation and selection of some bacterial strains capable of solubilizing phosphorus from longan cultivation soil in Vinh Long province

Nguyen Khoi Nghia, Do Thanh Luan, Nguyen Thi Thu Ha, Nguyen Minh Phuong*
Abstract | PDF (Tiếng Việt)
Phosphorus is a major nutrient essential for plant growth; however, its availability in soil is often limited as it primarily exists in insoluble forms. The study aims to isolate and select bacterial strains capable of solubilizing phosphorus from soil in long-term longan cultivation areas in Vinh Long. Phosphate-solubilizing bacteria were isolated using NBRIP agar. The study successfully isolated 34 bacterial strains with diverse colony and cell morphologies that exhibited phosphorus-solubilizing ability. Notably, strains VL2.3 and VL13.3 demonstrated the highest phosphorus solubilization levels, reaching 1603 mg/L and 1269 mg/L after seven days, respectively. These strains also exhibited the highest phytase enzyme production, with activities of 2.94 and 2.42 µmol/min after five days, and maintained relatively stable functions over the study period. In conclusion, the VL2.3 and VL13.3 strains, isolated from longan cultivation soil in Vinh Long, have the potential to facilitate unavailable phosphorus transformation and release from soil, thereby increasing the availability of phosphorus for crops.

Analysis of technical and financial aspects of Asian swamp eel tank culture model in the Hau Giang province

Nguyen Thanh Long*, Huynh Van Hien, Tran Truong Giang
Abstract | PDF (Tiếng Việt)
The study was conducted from August to December 2024 to evaluate the effectiveness of the swamp eel farming model in tanks in Long My, Vi Thanh and Chau Thanh districts, Hau Giang province. The study interviewed 52 swamp eel farming households in tanks about technical and financial aspects and advantages and disadvantages. The results showed that the swamp eel farming model in tanks has brought income to farmers. With an average stocking density of 686 ind./m² and an average farming time of 333 days/crop, the model achieved a yield of 1,243 kg/10m²/crop, with a survival rate of 79.7%. In addition, with an average revenue of 99.7 million VND/10m2/crop and a production cost of 72.7 million VND/10m2/crop, this model brings an average profit of 27.1 million VND/10m2/crop with a profit margin of 0.33 times, showing that this model has potential and brings income to swamp eel farmers. The biggest difficulty is that swamp ell get sick and production costs are high.

Assessment of the current status and proposed solutions for the conservation of fishery resources in the coastal waters of Binh Dinh province

Tu Hoang Nhan*
Abstract | PDF (Tiếng Việt)
The study identified areas with high concentrations of aquatic seed resources and the main spawning seasons of several economically important aquatic species in the coastal waters of Binh Dinh Province. Fish eggs and larvae were found in high densities during the Northeast monsoon season, particularly in three key areas: the Lai Giang estuary, the De Gi estuary, and Quy Nhon Bay, with average densities reaching 1.020 eggs and 20 larvae per 1.000 m³ of seawater. Shrimp seed resources were also concentrated in these areas, especially in the De Gi estuary and Quy Nhon Bay, where the highest densities exceeded 2.000 postlarvae per 1.000 m³ of seawater. During the Southwest monsoon season, there was a marked decline in density and a spatial shift in the distribution of seed resources. Most marine species in the region spawn multiple times per year. The primary spawning season occurs from March to May, while a secondary peak is observed in July. Based on the analysis, the study proposes two seasonal fishery closure zones: the Lai Giang estuary and the nearshore waters of Phu My District, with a total protected area of approximately 8.400 hectares. The proposed fishing ban period for high-impact fishing practices is from March 1 to May 31 annually.

Influence of mussel treatment and supplementation of snakehead fish (Channa striata) head protein hydrolysate on the quality of dried seaweed mussel (Corbiculidae) soup products

Truong Thi Mong Thu, Le Thi Minh Thuy*
Abstract | PDF (Tiếng Việt)
The study on the effects of mussel treatment and applying hydrolyzed protein powder from snakehead fish (Channa striata) head in dried seaweed mussel soup production consisted of four experiments: (i) the effects of soaking solution types and soaking time and (ii) drying temperature on the quality of dried mussel, (iii) the ratio of hydrolyzed protein powder to dried mussels, and (iv) storage time at room temperature on the quality of seaweed mussel soup. The results indicated that soaking in an acidic acetic 25% – NaCl 2% solution for 10 minutes, followed by drying at 60°C, gave a suitable moisture content (7.99%), yield (22.8%), and the highest sensory evaluation score (18.8 points. The final product exhibited good organoleptic properties, achieving a balanced and desirable composition with 13.7% protein, 2.95 mg/mL soluble protein and 5.74% lipids when mixed with 8.5% hydrolyzed protein powder and 8.2% dried mussels. Additionally, the seaweed mussel soup remained microbiologically safe and maintained good sensory quality after eight weeks of storage at room temperature.

Growth and mortality rates of Torpedo shrimp Parapenaeopsis maxillipedo Alcock, 1905 in Kien Giang waters

Vu Viet Ha, Tu Hoang Nhan*
Abstract | PDF (Tiếng Việt)
This study investigates the growth patterns, mortality rates, and exploitation rate of the Torpedo shrimp Parapenaeopsis maxillipedo Alcock, 1905 in the coastal waters of Kien Giang Province, based on the biological data collected from November 2022 to October 2023. A total of 1,162 individuals were randomly collected from the long train fishing trap for biological analysis. The length–weight relationship analysis revealed that Torpedo shrimp exhibits negative allometric growth (b < 3), indicating a relatively greater increase in length than in weight. The estimated parameters of the von Bertalanffy Growth Function were L∞ = 111.6 mm, K = 1.26 year⁻¹, t0 = –0.087, and the growth performance index Φ′ = 2.19. The estimated mortality rates were Z = 4.92 year⁻¹, M = 1.48 year⁻¹, and F = 3.45 year⁻¹. The exploitation rate (E = 0.70 year⁻¹) suggests that the stock is under considerable fishing pressure. These findings underscore the need for improved management strategies to ensure the long-term sustainability of this economically important species.

Developing an educational model based on deep learning theory: An innovative pedagogical approach

Nguyen Hoang An Khang*, Won Ho, Do Thanh Nghi, Pham Nguyen Khang, Phuong Hoang Yen, Bui Le Diem, Tran Trung Tinh, Vo Thi Anh Thu
Abstract | PDF (Tiếng Việt)
This study proposes an educational model integrating modern instructional methods such as WebQuest, learning by teaching (LbT), Building Thinking Classrooms (BTC), and Concept-Based Inquiry (CBI). The model effectively combines educational tools (OKMindmap, YouTube), educational technologies (ChatGPT, Educational Data Mining - EDM), and educational communication platforms (VideoTeach), aiming to comprehensively develop the 6Cs competencies: character, citizenship, collaboration, communication, creativity, and critical thinking. Through a literature review and model design, the study demonstrates the feasibility and potential of the model in promoting pedagogical innovation and enhancing learner competencies in the context of modern education.

Co-creation of tourism experiences: A bibliometric analysis using the Scopus database

Tran Tuyen*
Abstract | PDF (Tiếng Việt)
Co-creation of tourism experiences has emerged as a prominent topic, as tourists increasingly seek to participate in the creation of personalized and interactive experiences. The aim of this study is to analyze publication trends on co-creation in the tourism sector through three key dimensions: temporal, spatial, and thematic. The research methodology employed is bibliometric analysis, based on 514 scientific publications sourced from the Scopus database. The findings reveal three major trends: (1) a significant increase in the number of studies in recent years; (2) a concentration of research originating from developed countries, where tourism innovation and co-creation models are more prevalent; and (3) dominant themes including cultural and heritage tourism, tourist destinations, technology and innovation, as well as tourism markets and stakeholders. Based on these findings, several potential research directions are proposed.

The trauma of the character Sao in the short story and film Muoi Ba Ben Nuoc

Tran Trong Doan*, Huynh Thi Tuyet Ngan, Le Pham Quynh Giao
Abstract | PDF (Tiếng Việt)
By examining Cathy Caruth’s trauma criticism, this paper approaches the adaptation of the short story Muoi ba ben nuoc into the film of the same name through the lens of classical trauma theory. It highlights manifestations of trauma and how the character Sao responds to it. The analysis focuses on two key features of the classical model: belatedness and compulsive repetition. From this foundation, the paper explores how trauma is represented differently through literary language and cinematic techniques, revealing the strengths of each medium as well as the distinct perspectives and expressive choices of the literary author and the film director.

Analysis of the technical efficiency for the organic paddy production in Cai Lay, Tien Giang

Nguyen Anh Khoa, Huynh Truong Huy*
Abstract | PDF (Tiếng Việt)
The study evaluates the technical efficiency of the organic rice production at the household level in Cai Lay Town, TienGiang Province, using the survey data from 120 rice-producing households during the 2023 – 2024 Winter-Spring season and the application of the stochastic frontier analysis (SFA). Results show that the average technical efficiency score of the organic rice producing households gained at 0.979 lower than that of the referenced households at 0.998 with the statistical significance of 5%. The main reasons include the stringent requirements of organic production, which prohibit chemical fertilizers and pesticides, leading to lower yields. Farmers’ limited education and experience, coupled with reliance on natural conditions, increase instability in cultivation. However, organic rice households achieve a net profit nearly 7 million VND/ha higher than their conventional connterparts due to selling at higher level of rice price. These findings confirm that organic rice production is a promising pathway, which should be supported through cooperatives and technology adoption to enhance efficiency and ensure sustainable agriculture development.

Attitudes toward promotion and purchase intention of Gen Z: The mediating roles of brand awareness and brand desire

Nguyen Minh Canh*, Nguyen Phuong Nam, Thai Phuoc Nghia
Abstract | PDF (Tiếng Việt)
This study aims to analyze the impact of attitudes toward promotion on the purchase intention of Generation Z customers in Can Tho City through brand awareness and brand desire in the context of Katinat Saigon Kafe. The research model is developed based on the Theory of Reasoned Action (TRA) and the Theory of Planned Behavior (TPB). Structural Equation Modeling (SEM) is employed as the primary analytical method to test the proposed hypotheses. The analysis of survey data from 250 Gen Z customers in Can Tho City reveals that attitude toward promotion indirectly influences purchase intention through brand desire. However, brand awareness does not play a statistically significant mediating role in this relationship. Based on these findings, the study proposes several managerial implications to improve Gen Z customers’ attitudes toward promotional activities, thereby enhancing purchase intention through increased brand desire.