Every year, the agricultural industry uses many methods to handle harmful pests. In particular, biopesticides are always popular because of environmentally friendly materials, safety, and reduced farm product poisoning. The study has successfully developed an extraction process of banana leaf extract (Musa paradisiaca L.) by maceration method and investigated the effectiveness against diamondback moth (Plutella xylostella). The optimal conditions of the extraction process are obtained in this study, such as ethanol 99%, a solid-liquid ratio of 1:5, and a soaking time of 24 h. Additionally, the presence of alkaloids was determined by qualitative analysis and gas chromatography-mass spectroscopy (GC-MS). Besides, the highest efficiency against diamondback moth recorded is 20g/L for 35 min of spraying at ambient temperature.

Among the products and medicinal herbs from lemon, the product from the lemon peel accounts for a relatively large proportion of the product value. The peeling process is the first important step to get lemon peel material and is usually performed manually. Some semi-automatic lemon peelers have been developed, but the machine has low productivity and relatively high price. This paper is aimed to propose a design of a lemon peeling machine whose peel profile is peeled into the form of a single piece of conjoined yarn by moving the blade on a circular arc tangential to the outer surface of the lemon and the lemon is rotated around the vertical axis. The test results indicated that the lemon peeling machine succeeded with a peeling capacity of about 24 kg/hour (almost twice the rate compared to manual performance) and more than 85% of the purely removal rate.

The magnetic force distribution significantly affects electric devices' working characteristics, especially in switched reluctance motors. This distributed magnetic force determines the torque and efficiency of the motor. The examination of the magnetic distribution as well as the magnetic force is a necessary scientific matter. Therefore, two magnetic models, including the Ampere model and the virtual work principle are used to analyze and calculate the distributed magnetic force in the switched reluctance motor presented in this paper. Furthermore, switched reluctance motor which has new structure is also proposed to evaluate and compare the magnetic force distribution with the prototype switching reluctance motor structure. The survey results show that the magnetic force distributed in the two models is equivalent. The magnetic force distribution on the new switched reluctance motor structure is improved compared to the prototype motor structure.

This paper presents a method of planning conditional maintenance that improves the ability of motor management at Ca Mau Gas Company. The motor's status data will be collected periodically through online and offline tests. Then, the maintenance manager will suggest a reasonable maintenance plan for each motor based on the optimal spending of time and cost. The motor maintained by the conditional maintenance method will have higher working efficiency than traditional ones. This method will help to reduce motor damage's severity through proactive maintenance according to the proposed schedule.

The research is aimed to investigate the optimal temperature for the anaerobic treatment of seafood processing wastewater. There are 21 L anaerobic units with 3 temperature levels of 30°C, 35°C and 40°C randomly arranged in laboratory conditions. After 15 days of fermented, the results showed high treatment efficiencies of all treatments: TSS of 87.6 - 89.7%, BOD5 of 61.5 - 69.0%, COD of 70.7 - 83.4%, TP of 73.0 - 75.0%, total Coliforms of 97.4 - 98.8%. The average biogas yield within 30 fermented days reached 10.1 to 11.0 L/kg COD, but no significant difference between treatments. From day 22, the CH4 composition reached ~ 45%, which can be used for cooking. The highest treatment efficiencies of NT 35°C were recorded at the parameters of BOD5, COD, and TP; while the other parameters belong to NT 40°C.

Microfluidic paper-based analytical devices (μPAD) have provided a breakthrough in rapid sample and field analysis. The first time,  the CF279A toner ink was used to fabricate μPAD by laser-printer to expand the scope as well as provided evidence into research on the fabrication of laser printed μPAD. This paper used 102 filter paper, after printing on paper with laser printing, the mold was heated in an oven at a temperature of 150ºC to form hydrophilic and hydrophobic channels. The fabricated μPAD devices have hydrophobic and hydrophilic channel widths of 1.0 nm and 0.4 mm or more, respectively. Comprare with some research using other methods such as stamping. Screen printing gives a higher resolution.

Andrographis paniculata is a plant used to treat and prevent infectious diseases. This study investigates the chemical composition and biological activity of Xuyen Tam Lien distributed in Can Tho, Soc Trang and An Giang through the colorimetric reaction method, DPPH (2,2-Diphenyl-1-picrylhydrazyl) free radical neutralization method, and agar well diffusion method. The survey results showed that there are 10 groups of compounds present in the extract of A. paniculata, including carbohydrates, cardiac glycosides, flavonoids, phenols, amino acids and proteins, saponins, tannins, coumarins, diterpenes, resins. The aqueous extract in Can Tho and the methanol extract in An Giang had the best DPPH free radical neutralization effect. Most of the extracts were resistant to bacterial strains, including Bacillus cereus, Bacillus subtilis, Escherichia coli, Listeria innocua, Salmonella. This study shows that the plant contains many biologically active compounds, has good antibacterial and antioxidant properties, has high value when used as medicine, contributes to the protection and care of public health.

Andrographis paniculata is a plant with many uses and a good source of medicinal herbs. The interaction between microorganisms and A. paniculata were investigated at different levels. Three different places were selected to analyze the soil properties, isolate the bacteria, collect plant samples to determine the tissue structure, and living sites of microorganisms. The results demonstrated that A. paniculata had a wide range of adaptability in many kinds of soil. 55 bacterial strains were detected, in which the number of bacteria isolated in the rhizosphere soil was the highest, with 18 strains. The area that had the highest number of organic compounds (12.8%) isolated the highest quantity of bacteria (8 strains), while the other containing the lowest amount of organic matter (1.41%) detected the smallest number of bacteria (4 strains). Many parts of the plant were isolated with different numbers of microorganisms. Many tissues having cell walls composed of cellulose contained lots of matrices and had symbiotic microorganisms.

This research created film membrane of chitosan/gelatin base, combined with raw honey. Collected film membranes from chitosan/gelatin possess high brittleness and tensile. The gradual increase of the amount of honey from 0 to 8 % (%wt of polymers) leads to an increase in flexibility but a decrease in tensile, however the membranes still maintain the required tensile of a wound dressing. Besides, solubility, water vapor transmission rate, FT-IR, SEM and anti-bacterial showed that honey played a role of a plasticizing and anti-bacterial agent. Anti-bacterial property of honey is tested on Gram-negative Escherichia coli, Pseudomonas aeruginosa and Gram-positive Stahpylococcus aureus via the Kirby Bauer disk diffusion method. Results show that film membrane mixed with honey demonstrates the anti-bacterial ability against surveyed Gram-negative.

This study aimed to determine the conditions effecting the wine fermentation process of Canarium album using Saccharomyces cerevisiae. The findings illustrate that the wine products reached a high volume of alcohol (9.04% v/v), in suitable conditions, including the yeast levels of 107cells/mL, the added saccharose concentration at 25°Brix, pH 4,0, and the fermentation time for 12 days. There was the presence of biocompounds, including phenol, tannin, flavonoid, alkaloid, coumarin, quinone, saponin, terpenoid and steroid, in canarium solution and canarium wine. The total polyphenol content of Canarium album juice is higher than wine product, particularly 60.098 mgGAE/L and 29.001 mgGAE/L, respectively. After fermentation, the reduction DPPH capacity of wine reached an IC50 value at 1.17 μL/mL, higher than the Canarium album juice (IC50 value at 4.97 μL/mL.). In contrast, examination of the peroxide H2O2 radical scavenging capacity of wine indicated insignificant changes after the fermentation, namely 6.24 μL/mL of IC50 value in canarium wine 4.47 μL/mL of IC value in canarium juice. The results show that the original Canarium album juice and wine have good antioxidant capacity.

F18 fimbria plays an important role in Enterotoxigeneic Escherichia coli (ETEC) colonization and enterotoxin secretion on gut mucosa that causes post-weaning diarrhea (PWD). The vaccine offers a powerful, cost-effective, and possible approach to protect pigs against ETEC. Recently, many studies have focused on oral vaccine, which can induce mucosal immunity by targeting M cell. A body of evidence shows that protein Hsp60 is able to interact with PrPC on M cell surface. Based on Hsp60 structure model, a peptide named PEP was predicted to interact with receptor PrPC by bioinformatic calculations. To construct pET22b-pep-f18 vector, gfp gene was swapped for f18 gene from pET22b‑pep‑gfp vector. After digestion by XhoI and BamHI, f18 gene and pET22b‑pep‑gfp vector were ligated by T4 DNA Ligase. The pET22b‑pep‑f18 vector was transformed into E. coli BL21(DE3) strain, and induced by 0.5 mM IPTG. The expression of PEP-GFP protein was confirmed by SDS-PAGE Coomassie Blue staining, and Western blot probed with anti‑6xHis antibody. Finally, PEP‑F18 protein was purified by using immobilized‑metal affinity chromatography (IMAC). The results showed that the pET22b-pep-f18 vector was successfully cloned. PEP‑F18 protein was collected, and purified with high purity. This is an essential material for later immunological evaluation.

This study was conducted to isolate, select and identify lactic acid bacteria (LAB), which has properties that can be used a starter culture, from Vietnamese fermented pork sausage ‘nem chua’. The results showed that  19 bacterial strains were isolated on MRS agar medium. Most colonies were round,  having opalescent white color to milky white color,  raised or flat elevation,  lobulated or intact margin. Among 19 lactic acid bacterial strains isolated from ‘Nem chua’, there were 36.8% homofermentative strains and 63.2% heterofermentative strains. In the study of the ability to produce lactic acid and reduce pH, strain NTL2 and NTV2 were able to reduce pH faster than the others (3.65 and 3.7 respectively). They also produced the highest amount of lactic acid (19.13 mg/mL and 18.23 mg/mL) in MRS broth. Based on the typical properties of LAB, 12 strains were selected for identification by 16s rDNA sequence analysis, showing that: 6 strains are Lacticaseibacillus rhamnosus; 2 strains are Lactobacillus casei; 2 strains are Lactiplantibacillus pentosus, 1 strain is Lactiplantibacillus argentoratensis line, 1 strain was identified as Lactobacillus saniviri strain.

The green-kernel black bean is rich bioactive compounds and antioxidants. In previous work, effective soaking and germinating method on enzyme activity was carried out. This study aimed to determine the best hot air convection-drying mode for acquiring the highest quality of green-kernel black beansprouts. The drying experiments were designed including 3 stages with the temperature applied for stages 40-50oC, 55-65oC, and 70-80oC, corresponding to the stages of moisture content reduction. The best drying mode was determined through the variation of moisture content, amylase activity, protease activity, free glucose and amino acid content of the products during the drying process. The results showed that the appropriate drying temperature and time of stage 1, stage 2 and stage 3 were 50oC for 105 minutes, 60oC for 90 minutes, and 70oC for 60 minutes, respectively.

To determine the dosage of vermicompost and chemical fertilizers on the changes of soil bio-chemical properties, yield, and quality of fruit cove bean Rado 11. The experiment was arranged in a completely randomized design, two-factor, three repetitions, eight fertilizer formula. Factor A is two levels of inorganic fertilizers (1) 100% NPK (144N-126P2O5-100K2O) and (2) 50% NPK (72N-63P2O5-50K2O). Factor B is the four levels of vermicomposting (0, 10, 20, and 30 tons/ha). The results indicated that the content of useful nutrients (N, P) and the number of bacteria in the soil increased with the dose of chemical fertilizers and vermicompost.  Addition of 30 tons/ha of vermicompost improved soil pH, available N, P, and total soil bacteria compared with the control (without vermicompost). In this study, we investigated the effect of dose vermicompost and chemical fertilizer application on fruit cove bean growth, yield, and quality. The results show that the number of branches/plants, height plant, number of fruits, fruit yield and % brix  highest at dose 30 tons of vermicompost and 100% chemical fertilizers, the lowes at treatment without vermicompost và 50% chemical fertilizers. Correlation analysis results showed that there was a positive correlation between the dosage of vermicompost and chemical fertilizers to the increase in soil pH, available P, total soil bacteria, growth, yield composition and yield of fruit cove beans.

The house balcony landscape design work was carried out in Van Giang district - Hung Yen province to apply an Aquaponics system for landscape decoration. Current status data, customer needs are collected by interviewing and field survey methods. Design ideas are expressed using Autocad technical drawing software, SketchUp, and Lumion graphics. The research results have successfully applied the Aquaponics system combined with landscape decoration of the balcony with an area of ​​​​10.35m2, reasonable space organization with 2 functional areas, ensuring aesthetics and satisfying the requirements of investors with low cost.

This study was carried out to evaluate the effects of different salinities on growth and survival rate of mud clam (Geloina coaxans) in cultured tanks. The experiment consisted of four treatments and each treatment was repeated 3 times with salinity as follows: 1‰, 5‰, 10‰, and 15‰ was performed on clams with initial shell length (23.08±1.38 mm) and weight (3.13±0.5 g). After 105 days of culture, the survival rate of clams was highest in 5, 10, and 15‰ (100%) and lowest in treatment 1‰ (92,22%). In addition, the best weight and size growth of clams presented in 5‰ and 10‰ with SGRW from 0,34-0,37%/day and SGRL from 0,11-0,14%/day and were significantly different (p

The study was conducted to investigate the frequency of Enterocytozoon heparopenaei (EHP) presence in white-leg shrimp (Litopenaeus vannamei) cultured in Kien Giang province. The results showed that shrimps infected EHP after 4 weeks of culture. The infected shrimp had not shown external pathological signs, except for a significant decrease in sizes. Hepatopancreas samples of infected shrimp often contained very small spores which were pear-shaped or ovoid. Many EHP spores can be observed intracellularly & extracellularly in the lumen of the hepatopancreas tubes. PCR protocol for the detection of EHP amplified a specific product of 510 bp. The EHP 18s rRNA sequence isolated in this study matched the sequence published on the gene bank with 99.8% similarity. Shrimp can be persistently infected with EHP over months of culture. The prevalence of EHP was 18%-65%. After 12 weeks of culture, healthy shrimps were significantly larger in length and weight (13.6cm; 20.2g) than EHP-infected shrimps (11.3cm; 11.0g).

This study investigates the effects of modified starch and soy protein concentrate (SPC) on hardness, weight-loss ratio, size-shrinkage, change of TBARS and TVB-N of heated minced fish protein gels were stored at 0°C±1. The results showed that when adding TBBT or SPC at a ratio of 6%, the texture of the minced fish protein gel is improved; the rate of weight loss of protein gel after heating increased about 5-8% modified starch and 10-15% SPC; size shrinkage of protein gel increased in range from 5-7,5% for both gels adding modified starch or SPC after 15 days of storage at 00C±1. TBARS and TVB-N indexes did not increase significantly during the storage time of less than 9 days for both gels adding TBBT and SPC.

In 2020-2021, eleven surveys on the early-life stages of shrimps were conducted in the coastal waters of Ba Ria-Vung Tau province. Independent survey visits were carried out for 11 months with a frequency of 1 time/month. A total of 1,100 samples were collected by surface and vertical sampling nets. The results have identified 21 families, of which 19 taxons were classified as species and 14 taxons were identified as genera. The average density of ATT-TC is 9,073 individuals/1,000m3 of seawater. The coastal area is 16,656 ind./1,000m3, which is 2 times higher than the offshore area (6,251 ind. /1,000m3). The average density of the Southwest monsoon season is also nearly 2 times higher than that of the Northeast monsoon season, with 11,803 and 6,972 ind. /1,000m3 respectively. Two areas with a high concentration of shrimp seed resources are located outside Bai Sau and Ho Tram, reaching the highest with 13,592 ind./1,000m3. The offshore area has many buffer zones with an average density of 2,000-5,000 ind./1,000m3. In the northeast monsoon season, shrimp seed sources are distributed at a low density. In the southwest monsoon season, shrimp seed sources are still concentrated in the coastal areas but tend to expand with a background density of over 5,000 ind./1,000m3. The highest average density was 28,574 ind./1,000m3. Therefore, two areas located outside Bai Sau and Ho Tram are identified as areas with high and stable shrimp seed density, which is the scientific basis for zoning and establishing resource protection areas.

Can Tho university has applied an online learning approach and is very concerned about the effectiveness of the online learning approach. The study is conducted to provide valuable insights for organizing online learning at the School of Economics, Can Tho University effectively. The study aims to determine the factors influencing the online learning efficiency of students at the School of Economics, Can Tho University. The study uses an online survey with 155 students at the School of Economics, Can Tho University, who have participated in online learning. Cronbach’s Alpha is used to analyze the data reliability. Exploratory factor analysis (EFA) and multivariate regression are used to identify and examine factors that impact students’ online learning efficiency. The study findings indicate four factors that have positive influences on online learning efficiency, including (1) The design of the course, (2) Learning materials, (3) Student-faculty interaction, and (4) Student-student interaction. The course design factor has the most significant impact on students' online learning efficiency. Based on the study findings, the study proposes some implications to improve the effectiveness of online learning for students.

Building a socialist rule of law state in Vietnam is a major policy of the Communist Party of Vietnam and has been carried out continuously since the VII Congress of the Communist Party of Vietnam until now. The main mission is to build a socialist rule of law state and a clean and strong political system in all aspects, requiring the Communist Party of Vietnam and the Government to consider the influence of philosophical ideas and rational application to build a socialist rule of law state successfully. Therefore, attention to the doctrine of “legitimacy” is necessary.

Phan Van Hum has important contributions to studies of the patriotic poet Nguyen Dinh Chieu’s life, thought and literary oeuvre. He published three great books on this poet, namely, “Noi long Do Chieu”, “Duong Tu – Ha Mau”, and “Ngu tieu y thuat van dap” , and also some short essays published in newspapers and magazines regarding textual issues of Nguyen Dinh Chieu’s pieces. Phan Van Hum’s achievements in his aforementioned works are as follows: decoding the “sentiments of Nguyen Dinh Chieu”, shedding light on some misunderstandings regarding textual issues, determining the time when Luc Van Tien was composed, and collecting, synthesizing, annotating and criticizing Nguyen Dinh Chieu’s literary works. By analyzing and synthesizing, the paper elucidates Phan Van Hum’s contributions to the aspects above.

With abundant creative ability and intense passion for literature, Nguyen Nhat Anh is constantly enriching for Vietnamese young people’s literature. Nguyen Nhat Anh's long stories not only affect literature lovers but also have a pervasive effect on social life when they are turned into movies that are loved and welcomed by the public. This study uses a combination of methods such as analysis - synthesis, statistics - classification, survey - sociological investigation, comparative method and interdisciplinary research method to study the reality of receiving long stories and transformed movies of Nguyen Nhat Anh's long story in two main target groups: the specialized public and the non-specialized public. As a result, some recommendations and solutions are proposed to improve the reception of long stories and movies adapted from Nguyen Nhat Anh's long stories.

The article presents research on the value of narrative organization and the art of character building by means of stream of consciousness in the novel Một ví dụ xoàng by Nguyen Binh Phuong. With this technique, the author has shown the ability to reproduce the characters' moods, emotions and inner world. Besides, the art of character building has created a new and unique character image through blurring and focusing on the psychological process. Thereby, Nguyen Binh Phuong has shown his receptivity and creativity when applying the expression of Modernism in his compositions.

This study aims to determine factors effecting the competitiveness of shrimp exporting enterprises in Kien Giang province. The qualitative and quantitative methods are used to carry out the topic. The method of expert interview, group discussion, this study also builds a scale for the research model to conduct quantitative research. the results of the research model include 11 factors affecting the competitiveness of shrimp exporters in Kien Giang province. The test results, analysis such as reliability test (Cronbach's Alpha), exploratory factor analysis (EFA), Pearson correlation analysis and regression analysis. As a result, there are 9 factors affecting the competitiveness of shrimp exporters in Kien Giang province: (1) Strategic vision, (2) Market research, (3) Human resource management, (4) Customer satisfaction. products, (5) Technology application, (6) Products, (7) Financial capacity, (8) Production capacity, (9) Brand building.

Industrialization - modernization is concernced by both Central Government and Local Governments in Vietnam, including Can Tho. Therefore, this paper aims to estimate the impact of human capital on the industrialization process in Can Tho. This paper employed secondary data from 1995 to 2022 collected from the Statistics Yearbook of Can Tho. The result of the Autoregressive Distributed Lag model reveals the positive significance of human capital to the industrialization of Can Tho City besides other variables, including physical capital, foreign direct investment, urbanization, and economic growth. Unit root test, test for cointergration, and Bound test were conducted to select the appropriate estimation model and post - estimation tests to get the best results.

The use of a machine learning algorithm in combination with the data on cryptocurrency market price trends to make buying and selling decisions is studied in this paper. We suggest that agents combined with data trends should be used to make financial decisions instead of just using reinforcement learning. The research question is to answer the problem that can reinforcement learning (RL) win the financial market? RL that makes market-based buying and selling decisions can win in terms of profitability and limit risks? Results suggest that agents combined with data trends should be used to make financial decisions instead of just using reinforcement learning. Various financial indicators are applied such as Maximum Drawdown, Annual Profit, and Accuracy. Analysis results are conducted on two datasets of Bitcoin and Dogecoin, finding that the RL based on the trendline has more advantages than the RL without the trendline based on different performance indicators.

This study examined the mediating role of brand reputation on Facebook regarding antecedents of customers' perceptions of digital social responsibility and consequences of eWOM and purchase intentions. The results showed that 304 Facebook users in Ho Chi Minh Cityparticipated in online interaction (like, share, comment) with the social responsibility programs. Resource based theory (RBT) and Theory of reasoned action (TRA) to explain the relationship between digital social responsibility, brand reputation, electronic word of mouth, and purchase intention. Through Smart PLS 3 software for PLS-SEM analysis, the customer's perception of digital social responsibility positively influences brand reputation, electronic word of mouth and purchase intention.

Research on household welfare has always received the attention of academia and policymakers. In this article, the authors analyse the factors affecting household welfare in rural areas of Vietnam in the period 2006-2014. First, the study opts the asset index as representative of household welfare. Based on this approach, besides other factors related to household characteristics (such as ethnicity, gender), the study has pointed out the main factors affecting welfare, including education, labour, arable land, diversity of livelihood sources, and social capital. This result indicates the need for both households and government activities to take action to improve the welfare of rural households.

The study conducted face-to-face interviews with 235 consumers in Can Tho City to investigate consumer preferences on OCOP certified graviola tea. The results showed that only 15.2% of consumers have known and consumed OCOP certified graviola tea. The consumers mainly buy products at OCOP stores and at local tourist destinations. There are 7 factors affecting consumers' willingness to pay for OCOP certified graviola tea, including bid price, price sensitivity, gender, income, age, awareness of OCOP products and concern for the environment. By using the contingent valuation method, the study shows that the consumers are willing to pay a premium of 25% for the OCOP certified graviola tea as compared with normal graviola tea. The study proposed 6 solutions to develop OCOP products in general and the OCOP certified graviola tea.