The purpose of the paper is to present an analysis of the Interpretive Structure Model and the Cross-Impact Matrix Multiplication Applied to Classification as a tool to classify the specific importance of the factors and their relationships. The hierarchical relationship between the factors helps to propose solutions to promote technology transfer, application and innovation in Can Tho city more closely and more effectively. These main factors are grouped in 04 large groups containing 14 sub-factors which are identified through survey results from 217 businesses in Can Tho city and consultations many experts on science and technology. The results showed that the cluster "Drivers" including the factors of Technological Proficiency, The business-specific nature, and Government strategy and policy has the strongest impact on this activity.

The  land-use planning database has an effective support in managing and monitoring the land exploitation and usage, especially the implementation of public investment projects of localities. Several methods, such as documents and data collection, experts interview, inheritance, statistics, analysis and synthesis, maps and GIS applications...), were employed to analyze cadastral database and the data which related to land use planning and the adjustment of land use planning of Vung Tau City, in order to assess the present status of the input data sources for establishing the land use planning in the locality. The results show that the input data source of Vung Tau City contains enough necessary and high reliable information, basically meeting the requirements of building a land use planning database, which is according to the land data standard at Circular No. 75/2015/TT-BTNMT of MONRE.

Tebuconazole was dispersed in aqueous solutions of polyethylene glycol (PEG) and water in a desired mass fraction with a presence of dichloromethane (DCM). The mixture was then evaporated at 40oC under a pressure of 480 mbar to remove DCM and form nanotebuconazole. Nanotebuconazole particles size range is 27 – 35 nm with average size of 29 nm that was measured by dynamic light scattering (DLS) and the results showed that the ratio of PEG:H2O 4:1 is the most favorable for nanoparticle formation. In vitro tests using minimum inhibitory concentration (MIC) method illustrated that anti-fungal and anti-bacterial effectiveness of nanotebuconzole was demonstrated twofold increase compared with that of commercial tebuconazole for Ralstonia solanacearum, Fusarium ambrosium and Rhizoctonia solani and fourfold increase for Phytophthora capsici with MIC value are 50 ppm and 25 ppm respectively. Nanotebuconazole prepared in this study fully meets the standards of pesticides according to Vietnamese National Standards 9482:2012 (TCVN 9482:2012).

The vertical flow constructed wetlands were conducted in order to remove pollutants from surface water for agricultural purposes. Two studied factors were selected involving the common plants: Phragmites australis L. and Vertiveria zizanioides L., and hydraulic loading rates of 500, 100 and 1500 mL/min/m2, respectively. Studying results showed that the constructed wetlands with hydraulic loading rate of 500 mL/min/m2 had obtained the most effective removal: BOD5 in the effluent was 10.6±0.8 mg/L and average removal efficiency of 94.4±0.4%; COD was 24.3±2.7 mg/L and average removal efficiency of 90.6±0.8%; TSS was 23.6±0.2 mg/L and average removal efficiency of 84.4±0.6%. Statistical analysis techniques also showed that the average BOD5, COD, TSS reduction among the experient plants were not different (P>0.05). However, the data illustrated that the grasses factor had a positive effect on the removal efficiency related to fecal coliform. The factor of hydraulic loading rate, besides, there were statistically significant effects on the removal efficiency of BOD5, COD, TSS levels (P

In this paper, the electronic properties of defective Sawtooth Penta-Graphene Nanoribbons (DSSPGNRs) were investigated by calculating the binding energy, band structure, and density of states from first principles method. The types of defects considered here are monovacancy at either 4-coordinated C1 site or 3-coordinated C2 site and 2C double vacancy. The results showed that DSSPGNR has a significantly reduced band gap compared to the original sample. In which, the band gap of double DSSPGNR is more reducer than the one of  single DSSPGNR. These findings are expected to provide important guidelines for the practical applications of penta-graphene.

In this paper, vector equilibrium problems are considered via an ordering cone with nonempty algebraic interior. Using the wellknown lemma KKM-Fan along with the cone-upper semicontinuity and level convexity, sufficient conditions ensuring the nonemptiness and upper semicontinuity for the solutions to the considered problems are established.

Lumnitzera racemosa Willd is a mangrove plant that grows wild in lots of mangrove forests with a great deal of precious medicinal properties. However, there have not been many studies on this species, especially in Vietnam. In this study, the phytochemical composition of ethanol extract of L.racemosa as well as antioxidant and antibacterial activities against pathogenic bacteria causing diseases in the aquaculture industry were performed. The research results showed that ethanol extract of L.racemosa contains polyphenol and flavonoid contents were determined 138.532 mg GAE/g and 182.014 mg QE/g, respectively. The results of antioxidant activity evaluation indicated that the ethanol extract of L.racemosa possessed the highest activity on three testing methods as ABTS●+ (IC50=20.461 μg/mL), DPPH scavenging capacity (IC50=81.734 μg/mL) và total antioxidant capacity (OD0.5=86.943 μg/mL, followed by reduction capacity with the value of OD0.5=113.108 μg/mL. Concerning antimicrobial activities, the ethanol extract of L.racemosa shown good inhibitory ability against A.dhakensis, A.hydrophila, E.ictaluri, S. agalactiae with antimicrobial diameters 3.87 mm, 4.93 mm, 4.93 mm, 5.73 mm, respectively.

The overlap distance to build the fuzzy clustering analysis algorithm for interval data was used in this study that can determine the number of clusters, the specific elements of cluster, and the probability to belong to clusters of each element at the same time. The proposed algorithm is presented specifically step by step about theory, and illustrated by the numerical example. This research also considers the texture characteristics of an image to become the two dimensions interval for recognizing and applying the proposed algorithm. The numerical example and the applications show the advantage of the proposed algorithm in comparing to many the popular others throughout the statistical parameters.

In this paper, the 1-median problem with the solid circular vertex weights is considered. The set operations according to the Minkowski sum are introduced. Then, optimal criterion for a vertex that is a 1-median of the trees with solid circular vertex weights is given. Based on the result, an algorithm to solve the 1-median problem with solid circular vertex weights is proposed.

The mobility of two-dimensional electron gas in SiGe/Si/SiGe quantum well at finite temperatures is investigated for two cases: with and without in-plane magnetic field, considering two scattering mechanisms: remote charged-impurity and interface-roughness scattering. Exchange-correlation effects and multiple–scattering effects are also taken into account. The dependence of critical density of the metal–insulator transition on the carrier density, layer thickness, remote doping distance, temperature and magnetic field are studied. For temperatures lesser than 2 K, the calculation is in good agreement with previous results. The results can be used as guideline to grow Sillicon samples and control the temperature of system when measuring critical density and obtain information about the scattering mechanisms in the SiGe/Si/SiGe quantum well.

This study is to propose using the overlap distance to evaluate the similarity of two intervals. Based on the distance and cluster analysis problem for discrete elements, the study has built the forecasting model for time series with interval data. The proposed model is presented in detailed steps, and is illustrated by the numerical examples. It is also applied in forecasting the salty peak at stations of the main rivers in Ca Mau province. The proposed model can be quickly implemented by a procedure established in the software Matlab.

Among the sponge species in Southwestern Vietnam, Petrosia sp. (blue) is relatively abundant and little studied. Surveying the biological activities of sponge harvested at a depth of 10 m in Kien Giang waters gave a lot of useful information. Testing for microorganism,3 out of 4 samples, were well inhibited both Gram-negative and Gram-positive bacteria species; that are the total ethanol extract, the remaining ethanol extract, and dichloromethane extract, with IC50 less than 40 µg/mL. However, these extracts are neither antioxidant nor anti-Candida albican.

African swine fever (ASF) outbreaks firstly appeared in Phu Tan dictrict, An Giang province in July 2019, then outbreaks were reported from all 18 towns and villages of Phu Tan district. This study was carried out to survey some epidemiological characteristics of ASF and ASFV (African swine fever virus) genotype which have circulated in this region. The results from retrospective survey indicated that ASF happened in 163 out of 546 pig farms (29.85%), and 27.37% of pig population was destroyed. There were differences of destruction by pig categories, the high destruction was reported in breeding herds, in which the highest rate was on boars (100%), followed by sows (34.24%), growing pigs (26.83%), and the lowest was on piglets (24.96%). Genetic characteristics of ASFV were based on by partial genome sequencing of the B646L (p72) gene from 4 ASFV representative strains, the result showed that their sequences were 100% homologous with that of viruses previously detected in Vietnam, China and they all belonged to genotype II.

The research was carried out to clarify the characteristics and effective diagnostic method of Ehrlichiosis caused by Ehrlichia canis (E. canis) in dogs. A total of 151 blood samples was collected from dogs suspected E. canis infection. Blood samples from suspected dogs were diagnosed by using E. canis-Ab kit, and checked for the presence of E. canis mulberry embryos on leucocytes by blood smear staining and counted the platelets. The test results showed that 103/51 of the samples (68.21%) were positive for E. canis using the E. canis-Ab kit. By the blood smear assay, mulberry embryos were found on 80/151 samples, accounting for 52.98%. Thrombocytopenia was reported in 69/80 (86.25%) of E. canis-positive dogs. The prevalence of dogs infected with E. canis was not dependent on genders, breeds, ages, raising methods, and types of dog hair; however, it was dependent on the status of Rhipicephalus sanguineus infection. Diagnosis of Ehrlichiosis should be combined of E. canis-Ab kit testing and blood smear staining in suspected dogs with typical clinical signs. Thrombocytopenia is the most typical symptom for diagnosing dogs infected with E. canis.

The objective of this study was to investigate the current status of paclobutrazol (PBZ) use in rice cultivation, to evaluate the residues of PBZ in soils, and to examine the PBZ biodegradation efficiency of a bacterial product in rice soil in Chau Phu district, An Giang province. In total 32 rice farmers were interviewed. Then, 10 soil samples from 10 fields using PBZ were collected and analyzed for PBZ residues and an experiment was conducted in the field to examine the PBZ biodegradation efficiency of bacterial product in soil in a completely randomized block design with 4 treatments and 4 replicates. The results showed that 100% of the surveyed farmers have ever used PBZ in their rice cultivation to control the height and collapse of rice plants. The two most popular commercial products containing PBZ were Bidamin 15WP and Bonsai 10 WP There are two well-known commercial products containing PBT which are Bidamin 15WP and Bonsai 10 WP with dosage used being higher than the recommended one for a long period of time. PBZ residues in 10 soil samples were ranged from 0.09 mg/kg to 1.11 mg/kg soil. In addition, the treatment used with PBZ degrading bacterial product completely degraded PBZ in the soil after 35 experimental  days after sowing, however, it did not help to increase the yield of sticky rice as compared to the treatment without use of bacterial product after 1 experimental crop. Thus, PBZ degrading bacterial product has an efficiency in PBZ degradation in rice soil.

Lily (Lilium spp.) is an important plant with high economic value, grown in many countries around the world. However, bulbs of lily produced in Vietnam are not enough to meet domestic demand, most flower bulbs are imported from abroad. In this study, in vitro plant regeneration and micropropagation of lilies were established on temporary immersion system, using the bulb scales as the starting material. Surface sterilization with HgCl2 1‰ in 9 minutes, the fungus-free material is cultured on temporary immersion system using MS medium supplemented with sucrose 30 g/L, BA 2 mg/L, NAA 0.5 mg/L. The highest bulblet regeneration is 83.89%. The experiment results show that the highest number of bulbs (3.72) per explant was reached at 6-hour interval of 5- minute submersion while the number of roots per an explant is the highest (4.52 roots), submerged for 3 minutes with the cycle of every 6 hours. As a result, lilies can grow and develop better on temporary immersion system.

The experiment was aimed at investigating the growth and anatomical characteristics of Brachiaria mutica (B. mutica). The experiment was designed in completely randomized design with 7 treatments (T): T1 (10 days), T2 (15 days), T3 (20 days), T4 (30 days), T5 (40 days), T6 (50 days) and T7 (60 days). The growth and development of B. mutica at three different stages: (1) the budding stage from T1 to T3, in this period the plant concentrates on shoot regeneration; (2) the period of elongation of internodes and increase of leaf area from T4 to T6, which is the stage of strong growth, including height, stem diameter, length and width of leaves; (3) slow growth stage from T7 (60 days) onwards, at this stage leaf area stops growing. The results of microsurgery showed that in T7, the number of cells walls impregnated with lignin, the primary substance comprise of wood was achieved the highest. The structures of tissues with insoluble fiber such as sclerenchyma and collenchyma of stem in T2 and T4 were similar and lower than in T7. The anatomical images of leaves in T7 also showed a higher number of schlerenchyma as compared with T2 and T4, resulting in a decrease of tissue area capable of anabolic/photosynthetic processes. The optimal combination of yield and quality of B. mutica needs to be considered during the period from 30-60 days after cutting.

The upland rices are cultivated in highland, under limited irrigation conditions. Drought tolerance is a valuable trait for rice breeding program. However, studies and uses of this genetic resource are limited. Therefore, conservation and evaluation of morphological traits were conducted in order to find out valuable traits for rice breeders using for breeding program and provide the information for the conservation of valuable genetic resource. Of 147 evaluated upland varieties, 15 were selected as having valuable morphological traits such as green leaf sheath, erect flag leaf angle, erect leaf angle, strong culm (level 1) and absentce of hair awn. Based on these valuable characteristics, they were classified into 4 groups: group 1 with compact panicle and well exserted panicle consisted of Ba Cong, Kreng, and Mo Dai Tang varieties; group 2 with intermediate panicle, well exserted panicle characteristic includeed Bakelao, Cbr, Mo Dai Gor, Nam, San Dong và Thong Nong Epla varieties; group 3 with intermediate panicle, moderately well exserted consisted of Gor, Lua Thom Ran, Lua Xang, Lua Dung varieties; group 4 with compact panicle and intermediate panicle had Lua đo, and Pkoih varieties. The results were primarily provided basic information for future breeding program.

This study was to (i) determine the effects of NPK application on growth, yield and NPK uptake of sesame and (ii) estimate the indigenous NPK supplying capabilities of soil. The experiment was a randomized complete block design on alluvial soils, with four replications. The treatments included (i) fully fertilization (NPK); (ii) potassium omission (NP); (ii) phosphorus omission (NK); (iv) nitrogen omission (PK). Results showed that sesame yield response was recorded 34.38, 3.93 and 1.35 g m-2 for N, P2O5 and K2O fertilizers, respectively. The nitrogen fertilizer application significantly increased sesame yield through improving the number of capsules per plant. Moreover, the phosphorus or potassium application enhanced sesame height and the number of capsules, but they have not been increased yield. N, P and K uptake in NPK treatment was 4.43, 2.05 and 5.75 g m-2, respectively. The indigenous soil N, P, K supplying capability was 2.31 g m-2 for N, 4.99 g m-2 for P and 1.69 g m-2 for K in sesame.

The purpose of this study was to determine clinical pathology of Opisthorchiasis or Clonorchiasis in dogs by experimental infection. Research results show that clinical pathology in dogs were mild in the early stage and severe in the later stage, some clinical symptoms including mild fever, ruffled, tiredness, eating less, weakness, bloating, diarrhea or constipation and death. Gross lesion: The body was thin; the abdominal cavity was watery; hepatitis, congestion and hemorrhage, the face of the liver was inflaming and there were lots of necroses; the gallbladder was inflaming 2-3 times; the stomach contained some undigested foods; the colon was inflamed. Histopathological examination: In the liver, red blood cells were filled the vascular lumen, infiltration of inflammation cells, fatty degeneration of hepatocytes and vacuole degeneration; hepatocytes were necrotic and pink colour when they were stained with Hematoxylin and Eosin.

The main objective of this study was to evaluate the capacity in phosphorous solubilization under a number of different environmental conditions and antagonism against the Fusarium solani fungal strain of the fungus Aspergillus niger H4.7 (H4.7), a well organic material decomposer, isolated from the agricultural soil in Soc Trang province under the laboratory condition. The experiments for testing a number of different environmental conditions including pH, NaCl salt concentration and the solubilizing ability toward two insoluble phosphate forms (FePO4 and AlPO4) were carried out in NBRIP liquid culture medium while the antagonistic activity test of the strain H4.7 against the plant pathogenic fungus, Fusarium solani was conducted on PDA medium. The results showed that the fungal strain H4.7 gave the best result in phosphate solubilization and in biomass formation under the condition of cultural medium like pH=7 and 0% NaCl. Moreover, Ca3(PO4)2 was solubilized the most followed by AlPO4 and FePO4. Besides, results also revealed that the fungal strain H4.7 also had a good function in resisting the plant pathogenic fungus, Fusarium solani causing plant root rot diseases, especially, at 5 days of incubation, the antagonistic performance of the fungal strain H4.7 was achieved at 49.2%.

Curvularia sp. is one of the most important fungal pathogens causing damages on rice leaves and grains, leading to losses of rice yield. Based on this context, research was carried out to find out an effective and safe method on managing Curvularia. Results of surveying diversity of conidia and appressoria of Curvularia showed that four kinds of conidia were Y shaped, oval, cuneiform, fusiform; as well as three types of fungal appressoria were claviform, oval, elliptical with the wavy margin. Average conidial size range from 4.5-11.5 x 3.5-5.2 μm. Among three extracts of garlic, wrinkled-leaf mint, ginger with concentration of 2%, the extracts of garlic and ginger had high efficacy against hyphal development of Curvularia sp in vitro test. However, the garlic extract was better than ginger one on maintaining inhibiting efficacy. Under net house conditions, foliar sprays with garlic extract at one day before or after pathogen inoculation showed a disease reduction at approximately 86.62 and 87.97%, respectively, equivalent to positive control (150 g/L Difenoconazole + 150 g/L Propiconazole).

In plant breeding, transgenic is one of the most effective approaches because of the introduction of the target gene directly into the varieties. This approach needs to be through a complete tissue culture system. One of the most problems of tissue culture in indica rice varieties is the conversion of callus into somatic embryogenesis and regeneration at very low rate. Therefore, this study is aimed to develop indica rice tissue culture with highly somatic embryogenesis rate and the effectiveness of the regeneration process for Nang Thom Cho Dao as well as rice varieties in the Mekong Delta. The result showed that N6D (N6+2,4D) medium was suitable for callus induction (95-97%), while MS+NAA+kinetin and MS+B medium were used to induce 31.01% of somatic embryogenesis and regeneration, respectively. The results showed that the regeneration rate is still low, about 30.71% of the total induced callus. This result may be applicable for indica rice transgenic approach in the future.

Community is one of the subjects to ensure the sustainable development of a destination. Ha Tien city, Kien Giang province has identified community-based tourism development as a suitable direction in the future. This research was done to clarify the factors affecting the participation in tourism of the community, then provide local evidence in implementing solutions to attract community participation in tourism. Study data were collected from 100 respondents via questionnaire interview. Descriptive statistics and χ2 test were used to analyze the data. The research results show that there are 9 factors affecting the participation of the community in tourism (tourism skills, confidence to do tourism, desire to participate in tourism, tourism interests, family encouragement, opportunities to participate in tourism, traditional occupation ownership, perception towards the advantages of the tourism industry, local attraction policies). In order to attract more community participation in tourism, the locality should promote education and tourism development, widely provide coverage on the importance of the tourism industry, at the same time create favorable conditions for people to participate in tourism.

Researching on Tran Bao Dinh's Dat Phuong Nam ngay cu from the theory of ecological criticism, the article presents the manifestation of nature in relation to the human consciousness of the author. At the same time, nature is also an artistic image containing meaningful messages. Since then, the article shows the conception of human attitudes and behavior towards the typical cultural space of the South in this short story set.

Research the factors influencing the attractiveness of destination have the important role of development of the tourist destination. The study is aimed to address the factors impacting the attractiveness of Phu Quoc tourist destination, in Kien Giang Province. The result showed that there are eleven factors that influence the attractiveness of Phu Quoc tourist destination, in Kien Giang Province: (1) Humans resources, (2) Hygiene and no solicit tourists, (3) Price, (4) Material facilities and souvenir, (5) Tourism resources, (6) Safety and security, (7) Infrastructure, (8) Advertisement and promotion policies, (9) Relics and beaches, (10) Events, festivals and ecology, nature, and (11) Night entertainment. Based on the outcome, this study also provides some suggestions were proposed to increase the attractiveness of Phu Quoc tourist destination more in the future.

Producing high-quality rice for sustainable development of rice production is a direction in order to meet market demand. This research analyses the high-quality rice value chain based on GTZ ValueLinks (2007) approach using data collected directly from 100 farmers and 31 value chain actors in An Giang province. Research results reveal that the current high-quality rice value chain has some improvements compared to the conventional chain, in which the number of actors involved in the chain is reduced, farmers' profits are increased. The analysis of the chain value shows that the actors in the chain currently have a high added value, especially the food company. This is an important point as a basis for attracting businesses to join the cooperation with farmers. However, this value chain still faces many challenges such as contract breaks and quality management. Thus, in order to develop and improve the current high-quality rice value chain, it is necessary to develop and improve a new type of cooperative as a bridge between production and consumption, besides, it is necessary to involve financial actors to ensure sufficient support for farmers and cooperative enterprises.

The purpose of this paper is to investigate the effect of governance indicators (political stability, control of corruption, rule of law, regularity quality, voice and accountability and government effectiveness) on foreign direct investment (FDI) inflows to Asian countries. The authors employed an unbalanced panel regression model on data from Asian countries for the period 2000 to 2018. While controlling for standard FDI variables, the results provide that the political stability and absence of violence, voice and accountability, government effectiveness are correlated with FDI.

The aim of this research is to discover factors that affect the intention to use e-wallets through the mediating roles of attitude toward using e-wallets. Survey data collected from 201 respondents who have knowledge of e-wallet as Momo, Zalopay, AirPay, ViettelPay in Can Tho city was analyzed to provide evidence. Results from the partial least squares structural equation modeling (PLS-SEM) indicated that perceived credibility, facilitating conditions, performance expectancy, and social influence positively affects the intention to use e-wallets. Based on the results, a new approach was proposed to predicting the intention to use e-wallets through the mediating role of attitude toward using the e-wallet. Specifically, performance expectancy and social influence only indirectly impacted intention to use e-wallets; perceived credibility had a direct and indirect influence on users’ intention, and facilitating conditions only directly affected intention to use e-wallets. Finally, some recommendations were proposed to enhance the intention to use the e-wallet of customers in Can Tho City.

Salinity intrusion has created great impacts on rice farmers in the coastal provinces in the Mekong River Delta, including Ca Mau and Soc Trang. This paper is to analyze the factors influencing the decision to choose intergraded rice farming systems under saline intrusion conditions by using the Ricardian model. The results revealed that many integrated rice farming systems such as rice-fish, rice-shrimp, and rice-vegetables and others were recorded in the two provinces. The trend of changing from monoculture of 2 and 3 rice crops to integrated rice farming under salinity intrusion conditions was documented at a high rate of over 50 percent. The results also showed that factors affecting rice farmer’s choice between rice monoculture and integrated rice farming in Ca Mau and Soc Trang including land area, bank loan status, location, and salinity intrusion. In which, salinity intrusion is the most important factor that directly affects rice farmer's decision to choose intergraded rice farming. This result is consistent with the trend of agricultural restructuring in many other provinces of the Mekong River Delta.

Cold chain is a supply chain, which has ability to control and maintain the appropriate temperature for goods requiring refrigeration to prolong product life. This study was conducted to understand the current situation of cold supply chain of agricultural products (vegetables, tubers, fruits) in Can Tho City. Research data were gathered through surveying and in-depth interviewing 212 objects in the supply chain (suppliers, distributors, retailers, agro-processing enterprises and logistics companies). Data were then analyzed using descriptive statistical analysis method. The results showed that the cold chain has been initially applied for agricultural products in Can Tho City. From the current status, and opportunities and threats as well, appropriate suggestions were proposed for improving efficiency of applying cold chain of agricultural product at Can Tho City.