The copper-based metal organic frameworks CuOBA was successfully synthesized from the reaction of copper nitrate trihydrate and 4’4-oxybisbenzoic acid ligand by solvothermal method. The physico-chemical properties and structural characteristics of CuOBA were determined by a variety of different techniques including X-ray powder diffraction (PXRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), and Fourier Transform infrared (FTIR).This material was used as a heterogeneous catalyst for the C-O coupling reaction between 2’-Hydroxyacetophenone and benzyl ether to give 2-acetyl phenyl benzoate as the major product when using tert-butyl hydroperoxide (TBHP) (70% wt. in water) as an oxidant. Reaction yield reached more than 80% at 90oC in the presence of 5 mol% catalyst and 5 equivalents of oxidation TBHP after 8 hours. The results showed that CuOBA could be recovered and reused six times without a significant degradation in catalytic activity.

Vietnam's garment industry, a vital sector in the strategy of  economic and social development, has a long history of development. However,  globalization requires garment businesses to make more effort and, focus on the product quality to meet the needs of customers. The statistical quality control tools were applied in analyzing the current situation and proposing measures to control product quality better. First of all, control chart was used to determine any point out of the control limits; after that, the Pareto chart was employed to figure out the main errors; finally, the causal and effect diagrams were applied to analyze the causes of those main errors. The data were collected from line 1 with the product code PEI 44SW9067 in Tay Do Garment Joint Stock Company. Based on the results of these analyses, solutions were given to limit the defects on the products of the enterprise.

Cobalt based-zeolitic imidazolate framework (ZIF-67) is one group of metal organic frameworks (MOFs) and has been well-known as a material, which has the most outstanding physicochemical properties, has been applied to various fields. In this study, ZIF-67 was synthesized and analyzed by X-ray powder diffraction (PXRD), scanning electron microscope (SEM), fourier-transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The catalyst activity of ZIF-67 was investigated into rhodamine B (RhB) degradation in presence of peroxymonosulfate (PMS). ZIF-67 was a potent catalyst with high activity which had RhB removal efficiency reach of 100% when pH 3, temperature 35oC, RhB concentration 50 ppm, ratio of ZIF-67 to PMS 1:8. The efficiency on RhB degradation still maintained over 99% and its structure was remained unchanged after a triple use.

Nowadays, the applications of science and technology into teaching, research and production in the real life has become a popular trend. The entrance exams of sport aptitude for physical education at Cantho University (CTU) have been used mainly hand crafted instruments. However, these instruments does not guarantee the objectivity and fairness to candidates. Wishing to create a better device with the monitor and identify achievement system for longjump at the input of physical education CTU, Researchers use the Logitech C920 Webcam to take pictures and use image processing techniques to design models for far-jumping performance system. The equipment utilized  to build this system was specialized, low cost and operated by a computer-controlled software to ensure the objectivity and accuracy in evaluating the achievements of  candidates.

Land use planning and plans play an important role in the development of Can Tho city according to the socio-economic development orientation to 2030. The study is aimed to assess the factors impacting on implementation of land use plans in the period of 2006-2014 and thereby to determine their importance as bases to orient the solutions for land use planning to 2030. Secondary data were collected from the results of implementing land use plans for the 2006-2014 period of Can Tho city. Primary data were from the questionnaire-based survey of 180 local people and authorities. The method of multi-criteria analysis (MCA) with AHP technique were employed in the study. The results showed that the group of socio-economic factors have a decisive impact on the results of land use plan implementation, followed by land policies and ultimately technical process factors. Level two factors in each factor group also have different impacts on land use plans, in which elements of the market economy, the policy of mediation, reimbursement and investment is more important than other factors. Evaluate the impact of the group of factors and level 2 factors on the implementation of land use planning to help orient, establish and implement systematic and effective planning.

The aim of this paper is to study the model of Markov process in one dimension. The method of moments is here used, asin Depauw et al. (2009) and Lam (2014) to prove that this process conveges in distribution to a normal law (Theorem 1.1) and give its rate also (Theorem 3.1).More precisely, with  be the corresponding infinitesimal generator of the previous process and a given function  , we solve the Poisson’s equation  and then treat the limits of its solutions, the rate of the convergence is instantly given by the convergence of the moment.

Heterocyclic compounds containing quinazolinone core substructure are known to posess diverse bioactivities such as anti-inflammatory, anti-microbial, anti-hypertension, anti-convulsions, anti-cancer, anti-malaria and are considered to be important candidates for further developtment of new medicines. In this research, two synthetic pathways have been suggested for the synthesis of quinazolinone derivatives. The strong points of the methods come from the simpliness, utilization of cheap, environmentally frendly oxidant FeCl3 and especially the use of as green solvent as water. Based on these methods, two N-alkyl quinazolinone (2a-b) and four N-acetamidyl quinazolinone (8a-d) derivatives were successfully synthesized in good yields (62-81%). Anti-microbial activity evaluation found two N-acetamidyl quinazolinone derivatives possessing as good activity as Vancomycin hydrochloride against Bacillus cereus (MIC £ 8 µg/m).

The biological activity of curcumin in turmeric is of great interest because of its usefulness in food, cosmetics as well as in the treatment of human disease. However, the bioavailability of curcumin has not been fully exploited due to low solubility leading to poor absorption, metabolism and rapid clearance from the body. The study was conducted to improve the bioavailability of curcumin by improving solubility by forming a complex of curcumin with hydroxylpropyl-β-cyclodextrin (HP-β-CD), a substance believed to increase the solubility and stability of the drug. The main chemical constituents of turmeric essential oil and curcuminoid extracted from turmeric powder are ar-turmerone (40.8%) and curcumin (76.4%). The results from the analysis of Fourier-transform infrared spectroscopy (FTIR) showed that curcumin combined with polymers in the complex of curcumin-HP-β-CD and curcumin - HP-β-CD - essential oil. The water solubility of curcumin in the complex of curcumin - HP-β-CD and curcumin - HP-β-CD – essential oil were 159 and 229 times higher than that in raw curcumin, respectively. Mice given the curcumin-HP-β-CD complex had curucmin concentration in the blood about 5 times higher than those given raw curcumin and curcumin - HP-β-CD – essential oil at 8 h after ingestion.

In order to effectively exploit Plain of Reeds area with about 500,000 ha to produce high quality rice, this study was conducted to select themost adaptable aroma rice line. By using 7 non – photoperiod mutant rice lines Nang Thom Cho Dao as the experimental material in 2 seasons: Winter- Spring 2016 - 2017; Summer-Autumn 2017 with alkaline soil in Tan Thanh commune, Moc Hoa distrist and Kien Tuong town, Long An province. The results showed that LA15 and LA16 lines showed the tolerance to alkaline soil when cultivating in the field (level 1inWinter-Spring and level 3 inSummer-Autumn crop), aromatic and soft rice, amylose content (LA15 13, 26%, LA16 13,07%); protein content (LA15 6,62%, LA16 6,35%); Actual yield> 6 tons/ha. The PCR results with specific primers suggested that LA15 and LA16 lines have homozygous aromatic genes.

Based on surveys combining household interviews with Participatory Rural Appraisal (PRA) and the “walk-in-the-wood” method, this paper is to examine the knowledge of S’tieng ethnic minorities in harvesting and using edible forest plants in Cat Tien National Park. The survey identified 94 species of edible forest plants belonging to 44 families used. The majority of them were herbs (37.2%), followed by trees (23.4%), shrubs (20.2%), and finally climbers (19.2%). Plants used as vegetables accounted for 59.6% of the total and 12.8% had UI ≥ 0.8. Many species used as vegetables have been important materials for the favourite daily food of S’tieng ethnic minorities and become an important part of their traditional food culture. However, the knowledge of S’tieng ethnic minorities has not been paid attention to applying, preserving and developing through sustainable plant use yet. So the indigenous knowledge should be applied to sustainable edible plant use and conservation. Especially, the harmful harvesting practices need bannning soon. The highly valued forest plants traditionally used by S’tieng ethnic should be domesticated and commercialized.

This study is aimed to determine the effects of Brassinolide (BL) on citrus greening disease, yield and quality of “Duong” mandarin grown in Long My town, Hau Giang province. A field trial was conducted from August 2017 to October 2018. There were 5 treatments including BL concentrations of 0.05 μM (0.5 mL of 0.01SL); 0.10 μM (1.0 mL 0.01SL), 0.15 μM (1.5 mL 0.01SL), positive control (solution of ZnSO4 - at 5,000 ppm + MnSO4 5,000 ppm), and negative control treatment (water). All treatments were applied every two weeks until fruits were harvested (12 months). The experiment was arranged in a completely randomized design with 6 replications, one tree for each replicate. The presence of “Candidatus Liberibacter asiaticus” was determined by PCR using specific primers. Leaf samples were collected before and after the experiment. Quantification of leaves in iodine solution was used to diagnose the disease. The results showed that spraying BL at 0.15 μM periodically twice a week for 12 months resulted in the lowest disease incidence (2.3%), disease index (5.9%) and undetectable level of bacterial titer as shown by PCR. The latter was confirmed by the lowest concentration of starch in leaves (0.73 mg/g) and highest yield (28.4 kg/tree), fruit size and fruit quality than these of the other treatments.

The study was carried out to investigate the effects of plastic mulches on the growth and yield of purple sweet potatoes HL491 as well as pest infestation at Binh Tan District, Vinh Long Province. This study was conducted in Randomized Complete Block Design with 3 treatments and four replications. The treatments were (1) uncovered (as control), (2) silvery plastic mulch and (3) transparent plastic mulch. The results showed that length of the main stem, number of branches/plants, total number of tubers/ plants, marketable tubers/plant, tuber length, tuber diameter, tuber yield/ha, the hardness of tuber of sweet potatoes planted on ridges covered with silvery plastic mulch were higher in compared to those of the sweet potatoes planted on ridges covered with transparent plastic mulch and without covering plastic mulch. The silvery plastic mulch reduced the Nacoleia sp. infestation

The cause of oviduct fluke disease in duck is due to Prosthogonimus sp., disease considerable affect to efficiency of duck breeding. Diagnosis of this disease should be based on clinical symptoms, combined with detection of egg in the feces or surgery to detect oviduct fluke in the Fabricius or in the oviduct. Clinical symptoms of oviduct fluke disease in duck included: eating less, modeful, weak, unbalanced, eyes closed, lying down and reducing prey; duck reduced laying, egg shell was thin or without shell; in some cases, anus had a lot of fluid, duck-laying was suffering from pilets. Mortality was high but sporadic and extending.  In feces, egg of oviduct fluke was oval shape, two covers, brown, small capped head, embryonated egg. Duck necropsy found pink-red oviduct fluke in the Fabricius and in the oviduct. Gross lesion: Ovary was inflammation or inflam-sticky with abdominal sinus; the oviduct and Fabricius inflammation, swelling, congestion and hemorrhage; inside the oviduct there was a lot of mucus with grayish white colour. Histopathological examination: The epithelial cells of oviduct were inflammation, necrosis and exfoliation. The epithelial cells of Fabricius were degeneration, infiltration of inflammation cells, lots of polyps.

Zinc is an essential element and functions as cofactor for activity of plant enzymes. In this study, water management strategies and zinc supplement were combined to investigate their effects on growth and yield of OM4900 rice in the pot condition. The completely randomized design with 6 treatments and 4 replicates was employed in the experiment. Zinc was supplied at 15th day after sowing with 3 levels equivalent to 0, 15, and 30 kg of ZnSO4 per ha. There were 2 water regimes, continuous flooding and alternate wetting and drying irrigation. The result showed that alternate wetting and drying irrigation saved 671 m3 per ha, less than 36% of water usage in comparison to the continuous flooding. Zinc fertilization enhanced internode thickness, internode diameter, chlorophyll index but showed no effect on rice internode length. Yield components such as panicles per pot, filled spikelets per panicle, filled spikelet ratio were significantly improved when zinc supplemented but caused no change in the rice yield. The interactions between water managements and zinc levels were found on used water quantity, internode thickness, and filled spikelet fraction. Zinc also contributed to the improvement of harvest biomass, increased zinc accumulation in rice grain and endosperm.

In this experiment, Artemia was reared at 200 nauplii/L in 1.5L cones contained 1L cultured medium and light aeration, at the salinity of 30‰, 40‰, and 50‰with substitution rates of seawater (SW) to sea-salt water (SSW) by 0, 25, 50, 75 and 100% culture medium for each salinity; 3 replicates for each treatment. The culture was maintained for 20 days aiming to find out the effects of the salinity levels and substitution in the proportion of SW to SSW. The results showed that survival rate was highest at the SWgroup (R0: 89% and 78%) and the lowest was the SSW group (R100:74%; 61%) at 7th and 14th day respectively. Meanwhile, the length and biomass reached 5.9 mm, 2.0 g/L for R0 and 6.8 mm, 3.0g/L for the R100 group. In addition, Artemiacan live normally in sea-salt water via their reproductive activity. Moreover, the harvested biomass (2.76-3.26g/L) in SSW group was higher than those was collected in seawater group (1.96-2.01 g/L) giving a potential to develop a cost-effective Artemia biomass culture for inland hatcheries.

The study is aimed to find the suitable stages to apply biofloc for growth and survival rate of giant freshwater prawn (Macrobrachium rosenbergii) larvae. There were four treatments of carbon supplemented at different stages (stage 2, stage 4, stage 6 and stage 8). Stocking density was 60 ind/L, composite tanks of 500 litter each, rice flour as carbon source and C/N was managed at a ratio of 15/1, and salinity of 12‰ was used. The result showed that after 35 days rearing, prawn in carbon supplementation treatment of stage 6 had the highest growth length of PL-15 (10.10±0.20 mm) but the difference was not statistically significant (p>0.05) compared to treatment of stage 8 (9.60±0.30 mm), however, difference was statistically significant (p

This study was conducted to determine the optimum microalgal species and rearing density for black sea urchin’s larvae (Diadema setosum). In the first experiment, larvae (2.0 larvae/mL) were fed with four different mixtures of algae [Nannochloropsis oculata and Chaetoceros gracillis (N+C); N. oculata and Thalassiosira sp. (N+T); Thalassiosira sp. and C. gracillis (T+C); N. oculata, Thalassiosira sp., and C. gracillis (N+T+C)] for 25 days. The results showed that the highest survival rate (60±1.5%) was found for those larvae fed with mixture of the N+T+C. Similarly, the highest growth rate in total body length (TBL), mid-body length (MBL) and body width (BD) were also found for those larvae fed with N+T+C. For the second experiment, four different rearing densities of 0.5, 1.0, 2.0 and 4.0 larvae/mL were conducted. The larvae were fed with mixture of N+T+C (1:1:1). After 25 days, the highest survival rate (SR) was found in the treatment of 0.5 larvae/mL (62±2.0%) and the lowest SR was 9.0% for treatment of 4.0 larvae/mL. There was no significantly difference in the TBL, MBL and BD of those larvae rearing at the density of 0.5, 1.0 and 2.0 larvae/mL, but differed significantly with those larvae rearing at density of 4.0 larvae/mL. The results suggested that the mixture of algal N. oculata, Thalassiosira sp., and C. gracillis and larval rearing at density of 0.5 larvae/mL are recommended for future study on seed production of black sea urchin.

This study was conducted to determine the pathogenicity of Edwardsiella ictaluri bacteria in red tilapia (Oreochromis sp.). A total of 22 bacterial isolates were isolated from 25 specimens of red tilapia (Oreochromis sp.)  collected from nursery ponds and grow-out cages in Hau Giang and Vinh Long provinces. The typical clinical sign of diseased fish was  white spots on the kidney and spleen. Bacterial isolates were identified as Edwardsiella ictaluri based on morphological, physiological and biochemical characteristics as well as API 20E and PCR with E. ictaluri specific primers. Results of histological analysis revealed typical characteristics of white spots in the internal organs of bacterial infected fish species including necrotic areas, structural changes in the tissue, formation of granulomas and haemorrhage on the kidney and spleen. Challenge experiments by using the injection method showed that E. ictaluri was  capable of causing white spots in the internal organ of red tilapia with pathological signs similar to naturally infected fish with white spots in the internal organs. The LD50 valued about 4,7x103 CFU/ml.

The study is aimed to determine the optimal C:N ratio in biofloc system for the growth and survival of mudskipper (Pseudapocryptes elongates) fingerlings. The experiment was completely randomized design with three replication of four treatments including (i) Control (without adding carbohydrate), (ii) C:N=15:1, (iii) C:N=20:1 and (iv) C:N=25:1. Fish were stocked in 0.5 m3 tanks containing 0.3 m3 of 15‰­­ seawater. The initial weight and length of fish were 0.02±0.005 g/ind and 1.50±0.09 cm, respectively, and stocking density was 1.000 inds/m3 (300 inds/tank). During the culture period, water quality parameters such as TAN, nitrite, FV and chlorophyll-a were suitable for fish growth. After 42 days of rearing, the treatment C:N=15:1 resulted in the best growth rate with final weight of 3.06 g/fish, daily weight gain of 0.053 g/day, survival rate of 48.8%, biomass of 1.4 kg/m3 and FCR of 1.08.

Quang Nam is one of the leading provinces in fisheries in Vietnam. Nui Thanh district is an important area where small-scale fisheries on nearshore waters are focused. In recent years, the overfishing status in Nui Thanh district has made the rapid depletion of coastal resources. However, only a few have studied the fisheries management aspect in this area and no quantitative research on sustainable fisheries management has been conducted. This research project was conducted from 2013 to 2015 by surveying 110 fleets to find out reference values for sustainable fisheries management in Nui Thanh district. By using Sustainable Fisheries Models, the results showed that the maximum sustainable yield (MSY) should be 26,500 tons when the fleet capacity reached 80,500 HP (fMSY). To get the maximum economic yield (MEY) estimated VND 864.5 billion, the fleet capacity should be 64,300 HP, the MSY should be 25,500 tons; at that time, the fish stock was estimated about 76,000 tons. Fisheries management polocies and solutions were proposed for Nui Thanh district’s coastal fisheries toward the sustainable development by reducing fleet capacity, building alternative career models, protecting and restoring fish stocks.

The study was aimed to evaluate effects of broodstock sources on growth and survival rate of snakeskin gourami in the nursing stage. Three sources of broodstock including cultured fish in Dong Thap, wild fish in Ca Mau and Kien Giang provinces were reared for three months in hapas. The fry were artificially propagated from 15 pairs of breeders of each sources and kept separate by families during incubation. After 24 hours, the fry were pooled by broodstock sources (3 treatments) and stocked in 6 ponds (area of 200m2/pond) at the density of 500 fry/m2. After 2.5 months of rearing, the final mean weight of fingerlings from Dong Thap, Kien Giang and Ca Mau were 9.26 ± 1.18 g, 6.43 ± 1.07g and 4.13 ± 1.2 g, respectively. Dong Thap fish had the highest growth and the most uniform size, significantly different from Ca Mau and Kien Giang fish (P0.05) among treatments (from 1.16 to 1.20). The fingerling yields were not significantly different among three sources, averaged from 4,654 to 5,214 kg/ha. Research results of fry from Dong Thap broodstock faster grow than those of Kien Giang and Ca Mau sources.

The purpose of this study is to evaluate the effects of the supplementation of Ming aralia (Polyscias fruticosa (L.) Harms) leaves on the physicochemical properties (moisture, water holding capacity, gel strength) and sensory characteristics of snakehead fish sausage. The effects of blanching condition, pH of sausage emulsion, steaming condition and leaf percentage on the sausage texture, color parameters and sensory properties were examined, respectively. The  results showed that blanching Ming aralia leaves at 100°C for 20 s, combined with pH of sausage emulsion adjusted to 7.2 followed by steaming process at 85°C for 14.5 min helped to maintain the green color of the leaf in products and texture characteristic stability of fish sausage (water holding capacity 96.85% and gel strength 6358 gf.mm). The sensorial tests also revealed that Ming aralia leaves remained at 0.9% have positive effects on consumer acceptability with all of the sensory scores (color, aroma, flavor and texture) were higher than 4 (calculated on a 5-point scale).

Study on co-culture of the black tiger shrimp (Penaeus monodon) with red seaweed (Gracilaria tenuistipitata) consisted of 6 treatments in triplicate tanks. Shrimps were mono-cultured and fed commercial feed to apparent satiation as a control treatment. Other 5 treatments, shrimps were co-cultured with red seaweed and received different feeding rates of 100%, 75%, 50%, 25% and 0% feed ration of the control. Juvenile shrimp weight of 1.79 g were stocked at a density of 150 shrimps/m3 and red seaweed was 1 kg/m3. After 90 days of culture, the concentrations of nitrogen (TAN, NO2-, NO3- and TN) and phosphorus compounds (PO43-and TP) in the co-culture tanks were considerably lower than that in the monoculture. The survival, growth rates and productivity of shrimps in the 50% feeding ration did not statistically differ (p>0.05) from those in the control group, and the feed cost could be reduced by 49%. Additionally, red coloration of shrimps after cooking was noticeably darker in co-culture than in monoculture and there was no significant difference in the proximate composition (moisture, protein, lipid and ash) of shrimp meat among treatments except lipid. Those results indicated that application of 50% feed requirement in co-culture of the black tiger shrimp juveniles with red seaweed could be considered the optimal feed efficiency and improved water quality.

This study was carried out to determine the effects of CO2 on survival, growth, digestive enzyme activity and glucose concentration of white leg shrimp from 15-day postlarvae to juvenile stage. The study was designed using a completely randomized with 4-CO2 treatments including 2.32, 7.81, 19.0 and 45.6 mg/L equal to pH of 8.1, 7.6, 7.2 and 6.8, respectively. Postlarvae of 0.019 g and 1.20 cm length were stocked at the density of 100 ind./200-L tank. After 45 days, the survival rate of shrimp in control treatment (2.32 mg/L CO2 or pH=8.1) was 70.0%, and the lowest survival rate occurred in the CO2 treatment of 45.6 mg/L (28.3%). The lowest final individual weight and length in CO2 concentration of 45.6 mg/L were 1.09 g and 4.69 cm. The lowest enzyme activities were in CO2 treatment of 45.6 mg/L. Glucose concentration was highest in 37.5 mg/100 mL. The high CO2 concentration will adversely affect growth, survival rate, reduce some digestive enzymes and increase glucose concentration in hemolymph of white leg shrimp.

Summarizing is one of the most important skills in reading comprehension in reading instruction programs from the elementary levels in the United States, Australia, Singapore, and Korea. In Vietnam, the summary skills are also deal with the General Education of Literature subject curriculum by Minitry of Education Training which requires students to learn how to summarize texts based on their knowledge about each genre of text. This article showed the results of teaching and training summary skills for elementary students based on text genre through using mind maps.

The study is aimed to approach the Scratch software to create products in the STEM education model for students of mathematics teacher education at Can Tho University. After that, STEM-Scratch products of experimental groups were assessed by Dr. Scratch software. An statistical study was conducted to evaluate the effectiveness of this approach and show how to improve STEM-Scratch products in the model of STEM education.

Believe people, respect people, promote people is the philosophy of action throughout Ho Chi Minh’s revolutionary life. All his life, he has only one desire - the ultimate desire: the people are independent, free, enhanced living standards, living conditions and quality of life both physically and spiritually. This desire has become a concern in Ho Chi Minh’s mind and become the concrete actions, the real work and more profoundly to become the clearheaded guidelines and policies. Typically, it is the policy of nursing people which is actually a social security policy. This has created a great power and effect to bring the Vietnamese revolutionary career from one victory to others. This article initially finds out the unique characteristics that show Ho Chi Minh’s strategic vision through his thoughts on social security policies.

The study investigates the main factors that affect customer sastisfaction to the service quality of the supermarket in 2015 and 2017, aiming at: aiming at: (1) Evaluating changes in the level of impact of Quality of service factor to customer satisfaction and (2) Defining the components of the supermakert’s service quality that impactede on customer satisfaction. Quantitative research was conducted in 2015 and 2017, the research sample was the consumer who had shopped at Big C Can Tho. Data analysis methods were explored factor analysis, confirmatory factor analysis and structural equation modeling. The results noted: (1) There were the changes in the level of impact of supermarket service quality factors on customer satisfaction, in particular, the shift in the level of impact of the feeling price factor, the highest perception in the model at the time of year 2015, replaced by the service factor, the highest perception in the model at the time of year 2017 (the time of year 2015 was not significant in the model) and (2) Identifying the components of the quality of the supermarket service model, that affect customer satisfaction, including: goods; staff; ground; safety; services and price perception.

The two–steps system – GMM estimator with dynamic panel was used in this paper to investigate the effects of stock market and credit market size, and their interaction on economic growth of developing countries over the 2002 – 2017 period. The results showed that stock market and credit market size stimulated growth while their interaction reduced growth. Research also showed that the inflation in developing countries was at a level that promoted the economic growth; simultaneously, technology element, government effectiveness and regulatory quality had positive impacts on growth.

This study is aimed to establish the mathematical functions and tests relationships between optimal expected profit, order quantity and acquisition price in the two-echelon shrimp supply chain, considering loss aversion. The mathematical model was used to build functions and process the data through Matlab software. These data in both primary and secondary forms were collected from Minh Phu Seafood Corporation and echelons in the black tiger shrimp supply chain in Ca Mau. The results found that there was a difference in the expected profits between the centralized and the decentralized channels in optimizing profits of the echelons in these supply chains. The results also showed that the demand uncertainty and different levels of loss-averse would directly affect the inventory changes of the echelons in the shrimp supply chain.

This paper is aimed to evaluate tourists’ satisfaction about MIA Nha Trang resort’s service quality. The methods of qualitative and quantitative research were used to testing the research model with 6 factors impacting on satisfaction: reliability, competence, tangibility, empathy, responsiveness, perception of price. The results of data analysis with 350 questionnaires showed that tourists’ satisfaction of MIA Nha Trang resort’s service quality was affected by 4 factors: competence, empathy, responsiveness, and the perception of price. Based on the results, a number of measures to enhance tourists’ satisfaction about MIA Nha Trang resort’s service quality have been proposed.