The study "Treatment efficiencies of COD, total nitrogen, and total phosphorus of  the wastewater treatment system in CanTho Fishery Import Export Limited Company? has been conducted to assess the treatment efficiencies of the treatment system. Results showed that the treatment efficiency of COD of the system was in the range of 95 - 97% equivalent to theoretical efficiency from 95 to 98%; The treatment efficiency of TN fluctuated from 53 to 71% that is lower in comparison to the theoretical efficiency with the range of 75 - 84%; The treatment efficiency of TP fluctuated in range of 51 to 73% lower than the theoretical efficiency (84 ? 90%). The treated COD and TN concentrations exceeded from 1.06 to 2.55 and 1.7 to 2.54 times of National technical regulations on industrial waste water processing seafood (QCVN11:2008/BTNMT-Colume A). The concentration of TP overed from 4.1 to 17 times (QCVN 40:2012/BTNMT-Colume A). Therefore, there should be measures increasing the treatment efficiency of the wastewater treatment system.

The potential land evaluation and identification of scenarios for sustainable land use allocation was carried out by using economic quantitative land evaluation and optimization mathematic models. The results of physical land evaluation showed that there are 24 land units and 05 suitable zones for 07 land use types. For multi-criteria land evaluation combined with optimization mathematic model by the fuzzy method has determined the proper land use allocation that met the sustainable development of 05 physical suitability zones that based on the optimization of 5 objectives such as profit efficiency, required labor efficiency, cost/benefit efficiency, suitable land and environmental efficiency. The number of  weight was equal of 0.2 in 03 major constraints conditions of limited suitability area, labor requirements and the development targets of the land use types of local government.

Hidden Markov Model (HMM) is a statistical model, well suited for pattern recognition: speech, image, handwriting,... HMM has widely used in the last several years because of the two reasons. First it can perform with high accuracy in a wide range of application, second the model structure can be changed easily to fit practical applications. This paper focused on studying of HMM for speech recognition and installing it on FPGA. HMM has many parameters, so choosing appropriate parameters of the model for the FPGA is included in the project. The selection is very important and must balance between time and accuracy.

Salinity intrusion is one of the major problems currently faced in the Vietnamese Mekong Delta (VMD). The sluices, built to prevent salinity intrusion to protect rice cultivation, were converted to sea-water intakes for aquaculture production leading to heavy salinity intrusion in different areas in Tra Vinh. This study was done to assess historical salinity intrusion dynamics within the main river system in Tra Vinh and to predict future changes due to projected sea level rise (SLR) and declined upstream flows. A hydrodynamic model (MIKE-11) constructed by using available topographical data in 2005 when a baseline scenario was developed to compare with any changes in salinity intrusion in the year 2020 and 2030. The simulated results of the study showed that with the impacts of SLR, saline intrusion could be found futher inland; however, if the sluices were operated as designed, sline intrusion could be alleviated.

In this paper, we paper presents a novel approach to detect pornographic images based on the combination of the Scale-invariant feature transform method (SIFT), the bag-of-visual-words (BoVW) and the Arcx4 of random multinomial naive Bayes (Arcx4-rMNB). At the preprocessing step, we propose to use the Scale-invariant feature transform method (SIFT) which is locally based on the appearance of the object at particular interest points, invariant to image scale, rotation and also robust to changes in illumination, noise, occlusion. And then, the representation of the image that we use for classification is the bag-of-visual-words (BoVW), which is constructed from the local descriptors and the counting of the occurrence of visual words in a histogram like fashion. The pre-processing step brings out datasets with a very large num-ber of dimensions. And then, we propose a new algorithm called Arcx4 of random multinomial naive Bayes (Arcx4-rMNB) that is suited for classifying very-high-dimensional datasets. We do setup experiment with two real datasets to evaluate performances. Our approach has achieved an accuracy of 91.75% for a small dataset and 87.93% for other large one.

A one-dimensional (1D) flow hydraulic model for the river network of the Long Xuyen Quadrangle, Vietnamese Mekong Delta, was developed in HEC-RAS based on the available data of river network, cross-sections, boundary conditions and digital elevation model (DEM) in 2000. Developed scenarios included: (i) The first scenario based on the geometric data in 2000 (no dykes constructed); and, (ii) the second scenario based on the full-dyke systems. Such the scenarios were developed to understand possible impacts of the full-dyke systems to the area if the flood event in 2000 happened in the future. Moreover, through the model, the hydraulic properties and flow dynamics of the two scenarios were discovered, which provided a suitable base for any plan in related to irrigation network and (agriculture) land use. The obtained result of the study would provide strong base for the future research in the similar manner and be a useful tool for the water resource management.

Nonlinear static procedures (NSPs) are now standard in engineering practice to estimate seismic demands in the design and evaluation of buildings. The aim of this research is to improve the knowledge base on the accuracy of NSPs in estimating seismic behaviour of typical steel moment resisting frame structures (SMRF), considering the area of different seismicity and sets of ground motions of various intensities and frequency characteristics. The emphasis is on behavior assessment and quantification of global and local force and deformation demands for different hazard levels. Results of displacement, inelastic story drift response of a 9-storey steel building are determined by the Modal Pushover Analysis (MPA) procedure is compared with Standard Pushover Analysis (SPA) and Nonlinear Response History Analysis (NL-RHA) procedures. Thus, the modal pushover analysis procedure is accurate enough for practical application in SMRF buildings evaluation and design.

In this research, the method for producing flat sheets (MAT plate) from coir fibers, which was used and not used an adhesive substrate with the composite materials, was presented. Original materials are polypropylene and coir fibers, which were collected from Mo Cay district, Ben Tre province. The main equipment for the processing is hot pressure machine, Panstone, Taiwan that consists of a hydraulic press and heating press molds. The mechanical characteristics of the MAT plates, such as tensile strength, bending behavior, and impact resistance were analyzed. The results showed that this process was successful to fabricate the coir MAT plates, which can substrate to reinforce thermoplastic composite.

The objectives in this work were to investigate the real time concentration of nitrogen in constructed wetlands with subsurface horizontal and vertical flow in treatment of close-recirculated intensive catfish (Pangasianodon hypophthalmus) culture. Typha orientalis were planted in the systems, and the system of controls were unplanted. The inlet water (water from the fish tank) and outlet water of treatment systems was collected during 15 weeks to monitor the concentration of NOư2-N, NO3-N, NH4-N, and TKN over time. The results showed that concentrations of nitrogenous compounds were lower in the planted subsurface horizontal wetlands as compared to the others. In addition, NO3-N and NOư2-N levels were increased over time in the vertical flow systems that might affect the growth of fish. Remarkably, this research was the close-recirculated system, thus can reduce pollution discharge and increase water use efficient that contribute to reduce environmental pollution.

This study was implemented to detect coastal land use changes in both landward and seaward and from that it can be supported to manage and evaluate these changes. In this study, there were 4 types of imagery including LANDSAT TM and ALOS imageries to use for monitoring the change  status of coastal resources from 2006 to 2011; and high-resolution including THEOS and KOMPSAT-2 images to determine fish cage and snail net pen culture sites in the Northern partof Phu Quoc Island in 2011. The coastal land use change from agricultural land and Melaleuca forest into build up area is 349.89 hectares (51.13% of the total area changing). Benthic habitat with seagrass increased from ??10,985.84 hectares in 2008 to 12,869.83 hectares by the end of 2010; and spatial distribution of fish cage and snail net pen cultures. Finally, the spatial distribution map of coastal ecology including land use (landward and seaward) and aquaculture was developed in Northern part of Phu Quoc Island.

The study was conducted in Cau Ke, Tieu Can and Cau Ngang disctricts, Tra Vinh province with the main objective of identifying the possible impacts of local hydrological changes on land use change. The (local) hydrologic regime and land use data were collected in 2006 and 2010. Basic statistic approaches (descriptive statistics and trends analysis) were applied to analyze changing trends of the hydrological regime. The outcomes shows that salinity intrusion led to great impacts on agriculture and aquaculture farming systems both in tems of space and time. Impacts of hydrological regime change on local land use types were shown most clearly in the two districts of Cau Ke and Tieu Can (i.e. with emergence of new production structure and change in seasonal calendar). In addition, due to greater modification of the hydrologic regime in the inland areas, such the areas were more subjected to the sea level rise in comparison to the coastal area.

The effects of two types of synthetic antioxidant (EcotiveTM and BHT) on the chemical compositions of Catfish fat based biodiesel (FAME) have been evaluated. Gas Chromatography Mass Spectrometry (GC-MS) analytical results showed that the compositions of fatty acid methyl esters were not significantly changed by the used antioxidants during storage for one month at room temperature.

Application of a one-dimensional hydrodynamic model (HEC-RAS) to simulate hydraulic properties (flow and water level) and water quality in the Xang Channel, the Soc Trang City. After calibrating (Manning?s n = 0,033), simulated water levels met the measured ones well (correlation coefficient was greater than 0,96). For calibrating the water quality module (dispersion coefficient D = 400 m2s-1, time step = 1 hour, and initial condition of contaminant loads: COD = 13 mg/l, BOD = 10,5 mg/l, TN = 3,8 mg/l, and TP = 3 mg/l), the calculated error between observed and simulated data was lower than 20%. Besides, the simulated water quality with scenarios of changing the concentrations of contaminant (i.e. COD, BOD, TN, and TP) in the Xang Channel was influenced by the changes of polluted masses and flows from upstream. Finally, the simulated water quality was also compared with the Vietnamese surface water standards (QCVN 08:2008, column A2, B1) as a base of further discussion.

Study on the chemical ingredients from the leaves of Avicennia marina, collected in Dong Hai district, Bac Lieu province, we have isolated and identified two compounds: lupeol (C30H50O) and betulin (C30H50O2) from the petroleum ether extract. Structures of these compounds had been elucidated by modern spectroscopic methods: 1H-NMR, 13C-NMR, DEPT NMR and compared with published data. In this study, we tested and determined some biological activities of lupeol and betulin. As result, lupeol showed significant activity against human Hepatocellular carcinoma cells with an IC50 value of 93,53 mg/mL. Betulin was against human Lung cancer cells with an IC50 value of 25,84 mg/mL. Furthermore, when we tested nutrition of the leaves of Avicennia marina, we found out a lot of amino acids with high content, this explained why shrimp farmers have been using the leaves of Avicennia marina as natural food for shrimp. The study has been continued.

E-learning is considered one of the information technology (IT) solutions in education. This paper presents the results of building an e-learning system for supporting training under the credit system at CollegeofInformationand Communication Technology, Can Tho University. These results include: selecting the suitable solution for building an e-learning system; researching and choosing the standard and the learning management system (LMS); building some supplemental tools, especially tools integrated into LMS Moodle; suggesting the structure of knowledge matrix for organizing the question bank and structure of electronic lessons compliant SCORM standard; and deploying the system in the practice.

Drinking water contaminated by arsenic is a global threat to health, potentially affecting about 140 million people in at least 70 countries worldwide. The underground water in the Mekong delta in southernVietnamhas been exploited for drinking water by private tube-wells to meet the increasing demand since the mid-1990s. Unfortunately, it is contaminated by arsenic in the range of 1?845?g/L (average 39 ?g/L). In 2006, it is estimated that 0.5 ? 1 million people in theMekongdelta at risk due to arsenic exposure. This research aims to find out the suitable measure to remove arsenic in underground water to meet the current drinking water standard ofVietnamfrom available technologies, and develop the equipment based on the selected measures. The results showed that the combination of oxidation, coagulation and filtration processes can be used to reduce arsenic concentration in underground water to less than 10?g/L.

By the progress of national industry, there are more and more programmable logic controllers (PLC) having diversity of kinds and variety of technical functions on over the world as well as in Vietnam. More companies and factories in Vietnam (also in Mekong Delta) such as: pharmacy, making sugar, paper, cement,? all use PLCs in automation systems. The application of SCADA for supervising and controlling the whole system is one of the most essential tools for companies to control the system. This paper introduces application of WinCC for monitoring and controlling mechatronic system included stations using PLC S7-300, which doing many things: distributing, testing the materials, assembling some accessories, and sorting 3 types of products into the appropriate storages.

Sixty five microbial isolates were isolated on MRS medium from eighteen ?Com me? products collected in six provinces of The Mekong Delta. Their colonies were round, smooth white to translucent and their shapes were short rod to long rod, single or double or chained. All Gram +, catalase negative, oxidase negative, indole-negative, unable to move. They were capable of lactic fermentation from 10-20g/l. Eighteen isolates which had high lactic fermentation were identified by PCR technique with the primer pairs 8F and 1391R. Six isolates that were capable of production high acid lactic were chosen to sequence the 16S region. The results of Blast showed that B3.21n, AG.4, S3.111, K1.61, TCM1.42 and TA6 isolates were similar toL.plantarumstrain 0100,L.fermentumstrain 6-1-2,L.paracaseistrain ATCC 25302,L.caseistrain 0105L.paracaseisubsp.paracaseistrain BCRC 12193, andL.plantarumstrain ABRIINW-BL3, respectively.

Study was carried out to access the effects of salinity on physiological processes and growth performance of striped catfish under the impacts of global climate change. Juvenile striped catfish were acclimated with salinity condition within a suitable time and were distributed in 6 treatments including control, 2, 6, 10, 14 and 18 ppt of salinity. Results showed that fish had a highest survival rates in salinity condition from 2-10 ppt. Fish in 6 ppt treatment had high growth performance, low FCR and high survival rate (p

Replacement of Artemia with Moina macrocopa in seed production of Macrobrachium rosenbergii in improved green water system was carried out. Larval rearing system consists of 15 (60 liter/Tank) plastic tanks. The sixth stage larvae of Macrobrachium rosenbergii were used for this experiment with 5 treatments of different combination of Artemia and Moina macrocopa: Artemia only (control treatment); 75% Artemia: 25% Moina; 50% Artemia: 50% Moina; 25% Artemia: 75% Moina và Moina only. The result show that, concentration of TAN increased (2- 5 mg/L) with time in the treatments 4 and 5. Metamorphosis of larvae in the treament 5 was latest and lowest survival rate (16,42% ± 2,07). Survival rate of larvae in treatments 3 and 4 were high (35,41% ± 8,03 và 34,13% ± 5,19) but not significantly different to the control (p>0,05). In conclusion  replacement of Artemia with Moina macrocopa from 50% to 75% would reduce production cost of PL and increase profit in seed production Macrobrachium rosenbergii.

This study aims to find suitable salinity for growth of snake head fish. The fish (8-10 g/ind) were acclimated to different salinities (0, 3, 6, 9, 12, 15, 18, 21, 24?) to evaluate the plasma osmotic and ionic regulation of the fish during 21 days of the experiment. At the same time, the experiments on the growth and survival of fish exposed to different salinities (0, 3, 9, 12, 15?) was also conducted for 3 months. In addition, the tolerance of fish with high salities (10, 20, 30, 40?) was carried out. The results of this study showed that the plasma osmolality levels and ion Na+, K+ concentrations of fish were relatively stable in the water enviroment of 0-12? salinities. At salinity level of 12?, the plasma osmolality was equivalent to environmental osmolality (323 mOsm/kg). In high salinities of 15 - 24?, osmolality levels and the ion of fish increases with the increasing of salinity. The body weight and total length of fishes were highest at 3? and lowest at 12?. Fish can tolerance with changing salinity from 0 to10?. Shock resistance of fish was inversely adapted to the increase of salinity.

Postharvest loss of cereals in our country is still high, about 15 ? 20% of total cereals production. Postharvest loss happens not only in the fields, but also by respiration, microorganism, insect, pests and rodent. This paper discusses about post harvest loss of cereals by respiration.

The technical efficiency of watermelon production was estimated based on Cobb-Douglas Production Function using Maximum Likelihood Estimation (MLE). A primary dataset was collected from a survey of 118 farm households representing two different irrigation techniques in watermelon cultivation, namely drip irrigation and furrow irrigation, in Duyen Hai District, Tra Vinh Province. In this study, the volumn of water consumption was used as one of notable input variables to estimate the technical efficiency level which farmers attained in watermelon production. The results revealed that each household consumed, on average, 5,304 and 4,473 m3 of water per hectare  respectively for furrow and drip irrigation in the March growing season. Watermelon productivity was significantly influenced by the amount of N, P2O5 and family labor inputs. In addition, the results showed that farmers applying drip irrigation obtained a higher technical efficiency level compared to ones applying furrow irrigation, and the technical efficiency level of furrow and drip irrigation households is 73.0% and 79.2%, respectively. The average productivity loss due to inefficiency is 10.0 tons of watermelon/ha for furrow irrigation households and 8.3 tons for drip irrigation households.

This study was conducted to determine the chemicals which was applied to flocculate of Nannochloropsis and Chaetoceros to feed juvenile hard-clam Meretix lyrata. The experiment included 6 treatments and three replicates per each. Juvenile clams (SL: 18.69 ± 2.07 mm) were cultured in 50 liter plastic tank with the density of 30 individuals per tank. Nannochloropsis and Chaetoceros were flocculated by three different chemicals such as FeCl3, Al2(SO4)3, NaOH; and daily algal density diet were 30,000 cells/ml. After 90 days of culture, the highest survival rate (15.63%) presented in Chaetoceros flocculated by Al2(SO4)3, significant difference from the other treatments (p0.05). Results from this study showed that Chaetoceros algae are considered more suitable for juvenile clams than Nannochloropsis after flocculation.

Artemia experiment was carried out in earthen pond (500 m2) in Vinh Chau Station of Can Tho University at Soc Trang province, Viet Nam. Experiment was conduce with 3 different food items Treatment I (control): (Algae + chicken manure); Treatment II (Algae + chicken manure + rice bran) and Treatment III (Algae + chicken manure + shrimp feed). Artemia inoculum was stocked at density of 100 ind/L. After 6 weeks of the experiment, results indicated that growth and population densities through out the culture of all treatments were no statistically significant difference (p>0.05). Fecundity of Artemia in treatment III was highest (53 ± 18 embryo/female), treatment I (43 ± 10 embryo/female) and treatment II was lowest (42 ± 9 embryo/female). Cysts productivity obtained in treatment III was highest (157.22 ± 15.02 kg/ha/crop) and significant differences compared to the others    (p

In present, the coconut - cocoa intercropping has been enlarged in some areas in Ben Tre province due to unstable price of coconut and high economic efficiency of this cultivation system. However, the fruit yield of coconut and cocoa is very low. The low soil fertility can be one of the yield limiting factors. The study aimed at evaluation  of soil properties of coconut - cocoa intercropped orchards in Chau Thanh district - Ben Tre. Results from interviewed and soil analysis of 30 householdswho ownedthe orchards withcoconut aged 7 - 10 years, 15 - 20 years and 30 years old showed that all orchards had 40 years constructed raised beds and soils were degraded. Low soil pH, low organic matter content, poor in available nitrogen, and phosphorus, low exchangeable potassium  led to low nutrient supplying to coconut and cocoa growth, especially in the orchards with 30 years old coconut plants. Therefore, it needs to study for increasing soil organic matter and improvement of soil fertility in coconut - cocoa intercropping orchards in Chau Thanh, Ben Tre.

This study was conducted to evaluate the potential replacement of fishmeal protein by gut weed (Enteromorpha intestinalis) protein in practical diets for spotted scat (Scatophagus argus) fingerlings. A control diet containing fishmeal as main protein source was compared with five experimental diets in which fishmeal protein was replaced by increasing dietary levels of gut weed protein that is 10%, 20%, 30%, 40% and 50%. All diets were formulated to be equivalent in crude protein (30%) and lipid (7%). 30 experimental fishes with average initial weight of 0.49 g were stocked at salinity of 5 ppt. After 2 months of feeding trial, survival of fishes were similar, ranging from 81.1 to 84.4%. No significant differences (p>0.05) were observed in the growth rate of spotted scat from 10% to 40% substitution of gut weed protein and the control diet. The proximate composition (water, protein, Ca and P content) of fish carcass was not affected by the feeding treatments. However, the lipid contents of fish carcass reduced with increasing levels of gut weed protein in the diets. These results suggest that gut weed protein could replace up to level of 40% of fishmeal protein in practical diets for spotted scat fingerlings.

Soil physical degradation can be occurred under crop production because of excessive and imbalance inorganic fertilizer application. Among them soil water capacity and soil structural stability are important parameters that used for evaluation the physical soil fertility. The objective of this study was to evaluate the effects of organic manure effects on soil water capacity and soil structural stability on several soil types. The soil samples were collected from fields that are cultivated with pepper, vegetable in Mekong Delta, Binh Duong and Đa Lat. The measurement of these effects done by quantifying some soil analyses of soil samples were taken at two depths (0-10 and 10-20 cm). According to the results of statistical analysis, soil structural stability (SA) significantly changes on two different land managements at surface soil layers (0-10 cm) in the organic manure mixed inorganic fertilizer treatment compared to inorganic fertilizer treatment while the water holding capacity and available soil water content were only found with higher value in the organic manure mixed inorganic fertilizer treatment for peper, vegetable and pomelo cultivation.

This paper presents the screening result of antioxidant activites of 5 brown algae species S. angustifolium, S. aemulum, S. assimile, S. feldmanii and S. ilicifolium in Khanh Hoa province. Antioxidant activities were researched on total antioxidant, reducing power and DPPH activities. Simultaneously, phlorotannin/ polyphenol content in these algae species was showed. These species were collected during their reproductive maturity. The result showed phlorotannin/ polyphenol in S. angustifolium is highest. In the researched species, reducing power activity is stronger than other activities and reducing power activity of S. angustifolium is highest. DPPH radical scavenging activity oscillate from 50% - 96%.

This study was to assess biodiversity and spatial of zooplankton communities in the Cu Lao Dung mangrove ecosystem in Soc Trang province. Samples were collected two times taking samples in rainy and dry season with total 17 sites per season in the warp, the estuary and the mangrove. The seasonal variations of zooplankton standing stock in mangrove ecosystem indicated that the highest species occurred in rainy. The zooplankton communities were dominated by Rotifera in the rainy and Protozoa in the dry. In the mangrove, Magarlef index (d) was greater than those habitats in two seasons, while the Shannon-Wiener index (H?) was no different between the rainy and the dry. The zooplankton in the warp was lower than other habitats and Pielou's evenness index (J?) showed that they was the highest in dry, however  J? index of the estuary was the highest in the rainy. In general, there was high similarity (over 35%) between habitats about composition and density zooplankton in two seasons.

The project was studied for aims: (1) investigating farming practices and contamination of intestinal microorganisms in vegetable-growing areas at Phuoc Hau, Long Ho district, Vinh Long and Thanh Hoa, Thot Not district, Can Tho; (2) evaluating the effect of compost and lime on mitigating intestinal microbial contamination on vegetables. The results of survey showed that the current farming practices have high pollution potential of intestinal pathogenic microorganisms on soil, water and vegetables. Almost all soil, water and vegetable collected samples found contamination with Coliforms, E. coli, Samlmonella but Shigella.  The results of field experiment showed that using composted organic fertilizer at 10 tons/ ha and lime for treating water (250 g/m3) and soil (400 kg/ha) could reduce contamination of Coliforms, E. coli, Salmonella on vegeatbles to lower permit limits. Besides that, well-composted sugarcane-filter cake could improve lettuce yield.

The experiments on nursing and farming snakehead (Channa striata) at different densities using pellet were conducted. Fry, 15 days after hatching out were stocked at densities of 300, 400, 500 fish/500 L tanks. Fish were fed pellet at 44% crude protein. The results showed that the water quality parameters were in the suitable ranges for fish growth. Specific growth rates of fish were from 5.76 - 6.17%/day. High survival rate of snakehead was in the treatment 400 fish/m2 (74.7%) and the lowest was in the treatment 300 fish/m2 (70.4%). However, the survival rates of snakehead were no significant difference among treatments (p>0.05). The trials on snakehead culture were monitored in the lined tanks (15 m2). Three replications treatments of stocking densities were 100, 150 and 200 fish/m2. This experiment was randomly designed in 9 tanks belonging to nice households. Water quality parameters in the tanks were in suitable ranges for fish growth. After 4.5 months, the mean weights of fish ranged from 517 ± 38 to 684 ± 76 g/fish. Survival rates were 39.7 ± 0.57 to 79.6 ± 8.08%. At the stocking densities of 100 and 200 fish/m2, production were 43.9 ± 7.10 and 55.6 ± 5.09 kg/15 m2, respectively. The production of fish stocked at 150 fish/m2 was significantly lower than that of other treatments (p

Diabetes mellitus is characterized by abnormally high levels of glucose in the blood. The chronic glycemia is caused by different reasons. Out of these reasons, enzyme glucose-6-phosphatase (G-6-Pase) is mainly presented in the liver and kidneys take an important role in controlling the glucose. The objective is to estimate the activity of enzyme G-6-Pase in the liver and kidneys of diabetic mice treated by extracts of Morinda citrifolia L. Mice were induced by alloxan monohydrate (AM) at 130 mg/kg body weight. Then, mice were orally administrated  ethanolic extracts from Morinda citrifolia L.  and glucofast medicine. After 20 days, mice were taken liver and kidneys to evaluate enzyme G-6-Pase. The results proved that the extracts of Morinda citrifolia L. not only control blood glucose concentration in diabetic mice but also manage the excessive activity of enzyme G-6-Pase.

Fifteen mungbean varieties were grown at Hung Thanh ward, Cai Rang district, Can Tho city in Spring-Winter season 2010 to study the genotypic and phenotypic variances, correlation and path coefficients for plant height at flowering and maturity, internode number, pod length, pod number per plant, 1000 seed weight, and seed yield. The experiment was designed in Randomized Complete Block Design (RCBD) with three replications. Each variety was sown in five rows of 5m length with spacing 40 x 15cm and two plants per hill. DX-208 was control variety. The result showed all mungbean varieties grew and developed well. Agronomic traits gave wide genetic variation, especially, plant height at flowering, pod number and seed yield. Broad-sense heritability estimates of plant height at flowering, pod number, and seed yield  were heritable at 55,8, 26,3, and 26,5%, respectively. Plant height at flowering and maturity, pod number per plant and 1000 seed weight had positive direct effect on seed yield. Meanwhile, internode number and pod length gave negative direct effect on seed yield.

This study aimed at evaluating effects of some different commercial feeds on growth performance and feed conversion ratio (FCR) in 1-4 week-old Tau Vang chicken. The experiment was arranged in randomized complete with three treatments corresponding to the three types of industrial food. Each treatment consists of repeated 5 times, and each iteration consists of nine 1-3 day old chicks.  The feeds were GA1 (ME = 3.000 Kcal, CP = 19%), GA2 (ME = 2.900 Kcal, CP = 20%) and GA3 (ME = 3.000 Kcal,  CP = 21%). The results showed that there was no significant difference for live-weight, daily gain, feed consumption and FCR among the treatments. It was implied that the commercial feeds selling in the market are satisfying nutrition requirement for Tàu Vàng chicken in incubation period.

This study was carried out by sampling at 13 sites in mangrove forest, 3 sites in mud flat area and 3 other sites along Tran De river, Cu Lao Dung district, Soc Trang province in rainy season and dry season. This study identified (i) 13 shrimp species in 4 Families, in which Metapenaeus and Parapenaeopsis shared 31%, Macrobrachium and Exopalaemon shared 46%, Carinosquilla and Oratosquillina) took 15%, and Alpheus sp. took 8%; (ii) 74 fish species in 34 families, in which Perciformes was the most dominant and abundant in species composition (45%), Siluriformes shared 11%, Clupeiformes took 10%, Pleuronectiformes shared 10%. Two endanger species (VU), i.e. and two exotic species were found; (iii) Fish and shrimp species composition in rainy season was more abundant than ones in dry season; Species composition in Tran De river was more abundant than ones in the other two areas. Shrimp composition in mangrove forest area was higher than ones in mud flat area.

Rice lodging tolerant varieties are one of the best choices to control rice lodging. Basing on this purpose, the evaluating of the lodging tolerance of 12 improved rice varieties was conducted in randomized complete block design inDongThapProvince. The results showed that plant height of rice varieties in the experiment was shorter than 100 cm. The varieties with short internodes, especially the third and the fourth internodes, short cell length, hard internodes will help rice plant tolerate lodging. MTL392, MTL500, OM6073, TN128, OM4900 and VND95-20 were high yield rice varieties. Among them, MTL392 lodged before harvesting time. MTL466, OM2514, OM4495 and HĐ1 varieties showed good to fair toleratability to lodging. MTL384 and OM3536 did not show tolerate with lodging.

The aim of this study is to evaluate the chemical composition and antioxidant activities of polysaccharides extracted from brown seaweed Sargassum microcystum. Polysaccharides were extracted by three different extraction solvents: hot-water (100 oC), 0.1N HCl, and 90% aqueous ethanol. The results showed that among three extraction solvents, polysaccharide was extracted by 0.1N HCl exhibited higher yield of 40.2 ± 1.8% followed by hot-water (25.0 ± 1.3%) and 90% aqueous ethanol solvent (10.9 ± 0.4%). Crude protein obtained 9.3, 7.7, and 5.6% for treatments of hot-water, 0.1N HCl, and 90% aqueous ethanol, respectively. Total phlorotannins accounted for about 2.7, 6.5, and 2.1 mg/g of the hot-water, 0.1N HCl, and 90% aqueous ethanol treatments, respectively. The DPPHã free radicals scavenging activity, ferrous ion chelating activity, and Fe+3 reducing power of extracts from S. microcystum were increasing with increase of concentration. Judging from these results, it is therefore concluded that the polysaccharide extracts of brown seaweed S. microcystum possessed the good antioxidant activities and could be use in aquaculture.

Immune responses of red tilapia (Oreochromis sp.) vaccinated with Aquavac Strep sa was studied in experimental condition. Experiment was set up with 4 trials in triplicate including 1 control and 3      vaccine injection with concentrations 0.05 ml, 0.1 ml and 0.2ml/fish. respectively. Samples were collected in four times at 7 days interval starting from 7 days post vaccination. Results from haematological analysis revealed no significant reduction (p>0,05) in total number red blood cell in groups vaccinated with 0,05m and 0,1ml/fish compared with the control group but it was significant (p

Catfish (Mystus planiceps, Cuvier and Valenciennes) is an indigenous and economically valuable species in the Mekong Delta of Vietnam. For induced spawning of fish, an experiment was conducted with 6 treatments:  LHRHa+DOM 50; 100 and 150 àg/kg femal, HCG 1,000; 1,500 and 2,000 UI/kg female. Each treatment used at least 10 females. After 6-7 hours of injection with LHRHa+DOM or 7-8 hours of injection with HCG, the fish spawned except those in HCG 2,000 UI/kg female without any fish spawning. The highest spawning rate of 83.3% was obtained in LHRHa+DOM 100 àg/kg female meanwhile the highest fertilization rate (81.1%) and hatching rate (82.2%) were obtained from HCG 1,500 UI/kg female. Eggs were then used for a triplicate experiment on hatching with salinities of 0, 10, 20 and 30 ppt at density of 200 eggs/L. Results showed that catfish eggs hatched in all salinities from 0 to 30ppt, and the highest hatching rate (72%) were obtained from the treatment with salinity of 10ppt. Hatching time is 22.2 hours at average temperature of 28.3oC. In conclusion, catfish (Mystus planicepts) could be induced for spawning with LHRHa+DOM 100 àg/kg female or HCG 1,500 UI/kg female.

Twenty four outbreaks from An Phu district - An Giang province were surveyed. Serum samples were collected from these outbreaks. Enzyme Linked Immuno Sorbent Assay (ELISA) were used to detect virus and viral antibodies from the samples. The study results showed that: Nine out of 24 of outbreaks (33,33%) were antibody positive with Gumboro disease virus. Gumboro disease mostly happened in 19 - 42 day old chickens (57,14%), the incidence rate in over 42 day old chickens was low (11,11%). Scavenging chickens had lower incidence rate of Gumboro disease (25,00%) than that of chickens in cage (60,00%) and that of half scavenging chickens (33,33%). The Noi chickens had better resistance to Gumboro disease than Luong Phuong chickens.

Parapocryptes serperaster was one of the commercial fish in Mekong Delta and inhabited in situ muddy burrows in semi-intensive shrimp farming. It also breathed air at surface openings. The preliminary burrow morphology of this species was studied from June to September 2012 in Gia Hoa 2, My Xuyen, Soc Trang, Vietnam. The burrow was conducted by pouring polyester resin in situ opening burrows at sampling sites. Burrows had several openings, numerous branching tunnels and many bulbous chambers (i.e., dilated portions of the burrow). The structure of the burrow had a slightly sloping tunnel connected to interconnected chambers and many short cul-de-sac side branches. Simultaneously, it had no mound around the opening surface. The presence of these chambers accorded adequate space to help them to access easily the surface.

Studies on the changes of digestive enzyme activity and nutrient digestibility during the mixed feeding schedules of striped catfish (Pangasianodon hypophthalmus) were conducted. Striped catfish fingerlings (15-20 g) were stocked into 12 tanks at a density of 50 fish per tank. Four different mixed feeding schedules were tested on triplicate groups of fingerling fish including (1) fish were fed to apparent satiation twice a day for 5 weeks; (2) satiation for 7 days and starvation for 2 days; (3) satiation for 7 days and starvation for 3 days; and (4) satiation for 7 days and starvation for 4 days. The activity of digestive enzymes (amylase in stomach and intestines; and pepsine in stomach) and the digestibility of feed nutrients of mixed feeding schedules were significantly higher than those of the control group (p

A study was undertaken with the aim to find out the pure yeasts from pineapple to produce high quality pineapple wine. Results of study were followed, 23 yeast strains were obtained from pinapple juices at different treatment conditions (without and with added glucose) in two        different ecological zones, Kien giang (Go Quao) and Hau giang (Vi Thanh and Long My). Based on the classification keys of yeasts (morphology, physiology, and biochemistry), the yeast strains were generally characterized as three genera: Saccharomyces, Hanseniaspora and Pichia. Fermenting activity of isolated yeasts was higher than commercial yeast (saccharomyes cerevisiae). The isolated yeast strain namely VK1 (from natural fermented pineapple juice ? pineapple fruit was collected at Vi Thanh city) has showed the best fermenting activity such as fast fermentation by Durham test (6 hrs) and highest ethanol content (13,26% v/v). Identification of yeast by DNA sequencing showed the superior yeast strain VK1 belong to Saccharomyces cerevisiae.

Insecticide Fenobucarb is often used on ricefield in the Mekong Delta where is one of prefered habitats for snakehead fish (Channa striata). Therefore, this species is high risk of exposure to using this insecticide. This research aims at assessing effects of using insecticide Fenobucarb on ricefield for snakehead fish. The results showed that water concentration of Fenobucarb on ricefield varies from 14 to 291àg/L after one hour spraying and almost below detection limit (0,05àg/L) one day post application. No fish died under using Fenobucarb but cholinesterase (ChE) inhibition was seen upto 24% after one day exposure and completely recovery at day five after spraying. The study showed that using Fenobucarb on ricefield is negligible effects for snakehead fish. Enzyme ChE in this species can be used as biomarker for assessing Fenobucarb exposure in ricefield condition.

This research was conducted with the aim to determine the microflora composition presented during the cocoa fermentation in Vietnam, from which, it can be applied as basic data for further research about the interaction of micro-organisms effecting on the fermentation and the use of defined inoculum starters for controlled qualified fermentation. The research results indicated that different kinds of micro-organisms were involved and changed in turn to be predominant population during the cocoa fermentation. The highest counts of each kind of micro-organisms were as follows: yeasts (6.40 log cfu/g), acid lactic bacteria (6.30 log cfu/g), acid acetic bacteria (7.30 log cfu/g), Bacillus (7.40 log cfu/g) and moulds (4.41 log cfu/g). The total aerobic bacteria reach highest (10.45 log cfu/g) after 4 days of fermentation. The isolation results were obtained including 20 yeasts, 13 moulds, 12 acid lactic bacteria and 14 acid acetic bacteria. By using    macro- and micro-morphological examination and biochemistry analyses, different kinds of genera were characterized including: Hanseniaspora, Saccharomyces and Brettanomyces for yeasts; Rhizopus and Aspergillus for moulds; Leuconostoc, Streptococcus, Lactococcus and Lactobacillus for acid lactic bacteria; Acetobacter for acid acetic bacteria.

Objective of this study was to evaluate effects of some commercial feeds and phenotypes (feather colors) on egg traits of Tàu Vàng layer. The experiment was arranged according form two factors (3 kinds of feed and 4 phenotypes of feather color), with 3 replications, each a replication is one stall (5 hens and 1 cock).  Thus, a total of 180 hens and 36 cocks of 40 weeks old were used in this experiment. As result, it was indicated that there were significant effects of (i) weeks or periods of age on rate of embryos, (ii) feeds on egg production, (iii) feather colors and feeds on shape index and weight of egg before and after hatching eggs with an incubator, (iv) Additionally, significant interaction between feed and phenotype was found for egg traits (p

The ability to stimulate specific immune response in stripped catfish (Pangasianodon hypophthalmus) of Edwardsiella ictaluri bacterial strain mutated chondroitinase (CH) gene was studied. Antibody generated by group soaked with mutated bacteria at a density of 2,1x108 CFU/mL was significant higher (p

The study aims to define the suitable feed for rearing the Cobia from larvae to fry stage in order to contribute to developing protocol for seed production of Cobia fish. The triplicate experiment was conducted with 4 different feeding regimes of (i) Rotifer + Artemia; (ii) Rotifer + artificial feed + Artemia; (iii) Nanochloropsis + Rotifer + Artemia and (iv) Nanochloropsis + Rotifer + artificial feed + Artemia. Fish larvae (4.03mm) were reared at density of 10 larvae/L in 500-L composite tanks containing brackish water at salinity of 30 ppt and with continuous aeration. Results showed that after 21 days of rearing,  daily length gain (DLG) (0.84 ? 0.99 mm/day) and the specific growth rate (SGR) in body length (7.98 ? 8.67 %/day) of fish in all treatments were not significantly different (p>0.05) from one another. However, the highest survival rate (5.20%) of fish was found in the treatment (iii) fed with Nanochloropsis + Rotifer + artermia.

Filtration rate and Feeding rate of blood-cockle Anadara granosa was determined in four temperature (20 oC, 25 oC, 30oC and 35 oC); four densities (104, 105, 106 and 5ì106 cell/ml) and three kinds of algae (Isochrysis, Tetraselmis, Chaetoceros). Using indirect method by measuring algae densities to identify filtration and feeding rate, in this study blood-cockle has 4 ? 5 gr/ind, 2.23cm mean size. The results showed that filtration and feeding rate depended on environment condition, food content and kinds of food. Filtration and feeding rate was the highest with Tetraselmis used as food. The result also revealed that when temperature and density of algae increased, so did their filtration rate. 

GRA7, belonging to family of dense granule antigenic protein of Toxoplasma gondii, was successfully expression as recombinant protein in E. coli. S. cerevesiae or Baculovirus systems. In this study, the GRA7 antigen of T. gondii was express in cell-free system. The GRA7 gene of 711bp in length was chemically synthesized based on cDNA sequence of T. gondii GRA7 gene. The specific primers containing BamHI and XhoI at the 5?-end have been used to amplify the GRA7 gene from vector of pT7CEF1-CHis with positive control of GFP. The size and sequence of GRA7 gene were confirmed by double restriction enzyme digestion and sequencing, respectively. The expression procedure was carried out with two steps of transcription and translation. RT-PCR using specific primers for GRA7 gene amplified target gene with appropriate molecular size. Western blot showed the band of 29 kDa corresponding to molecular weight of GRA7 protein. Positive ELISA result using swine anti-T. gondii polyclonal antibody and goat anti-swine HRPO conjugate with dilution of expressed GRA7 antigen in the range of 1,000-4,000 dilutions indicated the successful expression of GRA7 in cell-free protein synthesis system.

In order to assess the current status of water environmental, technical and financial aspects of Babylonia culture in Phu Quốc island, this study was carried out through water sampling monthly (May to October, 2011) at highest and lowest tidal levels at 4 sampling sites in Babylonia culture area. Besides, the interviews of 30 Babylonia farmers were implemented in 5 hamlets in Phu Quoc district, Kien Giang province from October to December, 2011. The study shows that salinity, temperature, pH, DO, BOD, COD, TN and TP varied non-significantly in temporal and spatial terms. The environmental variation was suitable for Babyloniaculture. Average culture area of farm (fence) was small (171 m2). Seed size and stocking density were 0.054 g/ind and 548 ind/m2, respectively. Culture duration was 4 - 4.5 months/crop. Survival rate and harvest size were 73.9% and 8.7 g/ind.(115 ind./kg), respectively. Yield was 352 kg/100m2. Selling price was VND 182 thousand per kg. Profit and B/C gained VND 22.6 mil./100m2and 0.68, respectively. In addition, some major issues and suggestion for further development of this culture system were mention in this study.

The history of the public education in the M.D between the years of 1975 and 2000 is an important period in the process of the establishing part of advanced education system. However, recently, the M.D regional public education has not became the focus yet if compared with other public educational regions along the country as a whole. In fact, there have been tremendous achivemants in public educational  in the M.D since 1975. Specifically, challenging obstacles in public educational have been over come. overcome difficulties and build a more in-depth education, An advanced educational system as part of national ? wide program has been on progress for development of industrialization and modernization of  the M.D.

Party and State have confirmed that ?science and technology is one of the national priority policies because it plays a key role in the national construction and defense. Besides, it is also foundation and driving force for industrialization and modernization, and sustainable development of the country?. Furthermore, scientific research plays an important role in higher education because it not only contribute to improve the quality of education but also to create new knowledge, new products for the development of humanity. This paper, reports the result of scientific research activities of the staffs and lecturers atDongThapUniversityin period of 2006 - 2011.  In addition, based on the specific situation analysis, the article proposes effective solutions to build research activities of staffs inDongThapUniversity.

Narrative point of view which is the starting point of the art structure in the narrative work. As narrative or descriptive, writer must determine and select the logical point of view. It is the source for the art building structure in a work of fiction. It defines "focalization" (the word used by G. Genette) of the narrator in narrative objects, in the real world that are fictitious in a work. Application of theory "point of view" in narratology to study Nam Cao?s short stories before 1945, the writer has pointed out four main types of point of view of the narrator, such as: the inside point of view, the external point of view, the complex point of view, the ?linear? point of view. The diversity, flexibility in all point of view which has created a polyphonic, multi-tone, shade of aesthetic and artistic value to Nam Cao?s short stories.

Corruption and bribery are a complex and multifarious phenomenon which is hard to define and easily causes a confusion. The aim of this study is to review and discuss existing studies on corrupt definitions and types of corruption, using a sample of 65 papers published on international journals. More importantly, this study also shows the biases of corrupt definitions, compare types of corruption with rent-seeking activities and eventually provides conclusion and implications for future research.

Sociolinguistics is a Language Science born in the early 1960s in the Western countries. On the social side, it was derived from the socio-economic crisis of the industrialized countries. In terms of epistemology, it was born from the inability of traditional linguistics and structural linguistics in solving linguistic problems posed by life. This article summerizes the process of formation of sociolinguistics, different concepts on its characteristics and research objects, and major schools of this new discipline. Especially, the author highlights the sociolinguistic school of Rouen, which forms many doctors of language sciences, including sociolinguistics.

To write a describing essay satisfying the standard of a full-constituted entity, primary students must have many necessary skills: defining requirements of title, observing to look for ideals, make outline, writing paragraphs, linking paragraphs each other... Gathering and arranging ideals are important skills and not easy for most of children. If primary children do not know how to make outline for a describing essay, they will create a messy essay, lack of duplicate. At the present, in teaching at primary level, mind map is used as a useful tool to gather and deploy ideas effectively in writing process. This paper described the experiment which aimed to train grade-five students of Vietnamese ? American school (Can Tho city) to using mind map in building the ideas of descriptive essay. The methods such as experiment teaching, observing class, quantitative and qualitative analysis were used to collect primary students? learning products. The experiment initially demonstrated that mind map is an effective look helping students study well descriptive essay. Besides, if being guided logically, primary children not only develop skills of collecting and deploying ideals but also develop their associated and imaginative ability.

English as a foreign language (EFL) education has just received a wide attention for decades and learners motivation has been studied. From a psychological perspective, without sufficient motivation, even the brightest learners are unlikely to persist long enough to attain any really useful language. For that reason, there are numerous studies on motivational aspect on university students. Unfortunately, little research on such issue has been carried out in post- graduate (Master students) teaching contexts. To fill the gap of that body of knowledge, this research measures motivation and motivated learning strategies of Master students learning non-major English at Can Tho university. The 19 item questionnaire was adapted from the Motivated Strategies for Learning Questionnaire (MSLQ) to measure intrinsic and extrinsic motivation and motivated learning strategies used by 282 post-graduate learners. The findings are found and pedagogical suggestions are made to improve students academic achievement in crowded classrooms.

The birth of legend of place names bears a practical meaning as a demand of reality domination showing most concentratedly in the early stages of the historical progress of a new territory. In this article, we mention to a representative group of place names legend describing the formation of place names in association with historical figures who pioneered in land reclaimation and village foundation in the Southern historical progress. On the genre approach and data collection which are Southern folklore collecting works, the article analyses structural features and contents, story meaning of the group, to outline a specific part of Southern place names legend about reclaimation.

In fact composed diverse, rich and unique artistic style, the writer Binh Nguyen Loc has established a position quite sure in the array prose southern half of the twentieth century. His work contributed to recreate a real and profound changes in the lively social life, spiritual life of the community residents of southern land at western civilization began to introduce in our country. Short stories and novels are genre writers forte Binh Nguyen Loc. However, can not ignore the contributions of the writer in the essay category. From the cultural perspective, the following article will focus on survey value of a work of art typical essay: The step wandering the streets of Binh Nguyen Loc; thereby, may read more, understand correctly, understand deeper writing career and prose style of Binh Nguyen Loc.

For the teaching of mathematics, one of the important tasks for teachers is to help students  detect and correct errors. From there, students are given the opportunity to develop their thinking, reinforce the knowledge and skills, be more cautious while doing homework. In this paper, we have designed a pedagogical experiment to find out the errors of students when studying fraction topics and partially to help them detect and fix errors.

Tourism industry has become one of the most developed economic key sectors. Nowadays, most of countries in the world choose tourism to improve economy and country in general.Viet Namknown as an attractive country by its beauty and peace owns many attractive destinations includingPhuQuocIsland. According to a CNN reporter?s judgment, Phu Quoc may become the king ofAsia?s beaches in the future. Tourists are widely different in many ways. It?s impossible to satisfy all of the customers, as a result of that segmentation is used to choose target customers. Segmentation in tourism is the strategic tool to tap all these groups of tourists so that it can choose a segment to serve most effectively and to focus on service. This study focuses on segmenting tourists by psychographic factors and socioeconomic factors. The kind of tourism researched is ecotourism inPhuQuocIsland. Results indicate (1) numbers of tourists group in Phu Quoc ecotourism, (2) identifying characteristics of the target group.

The study aims to build scale for assessing the level of satisfaction of the taxpayer on the quality of supportive communication services in the Tax Department of Kien Giang province, using the Parasuraman scale. On the basis of the theory of quality public services selectively inherit the results of previous studies,  legacy service quality assessment methods of Parasuraman include 7 components: facilities; transparency; service capacity; response; reliability; justice and democracy; and sympathy.  Coordinating  with the opinion of the tax experts, the author proposed research model consisting of seven factors affect the level of satisfaction of the taxpayer. From the initial model proposed, the author conducted a survey on 350 samples studied and applied testing methods Cronbach alpha and EFA analysis, ANOVA, results of model studies to evaluate the level of satisfaction of taxpayers for the quality of communication support services in the Tax Department of Kien Giang province consists of seven components: 1. Compassion and justice; 2. Reliability; 3. Responses; 4. Open process; 5. Service capacity; 6. Facilities; 7. Open mission . Based on study results, the authors have proposed a number of measures to improve and enhance the quality of supportive communication  services to meet the increasing needs of taxpayers.

This paper presents the results of a survey on 385 economic graduates? employment in Can Tho University. Basing on the tool of Factor Analysis and Logistic Regression, five groups of independent variables which affect the decision of returning to one?s hometown to work were studied: (1) Working conditions of one?s hometown, (2) The Local sentiment, (3) The local cost of living, (4) The local average salary, (5) The implementation of local preferential policies. In the same way, factor analysis also indicated that there was no correlation between male and female students in decision of returning hometown to work. Meanwhile, the graduates who were affected by family factors had a stronger decision of working in their hometown than the other ones.

The purpose of this study is to figure out some solutions enhancing tourism service quality of Hau Giang province. The data were collected from interviewing 116 eco-tourism travelers and 100 cultural tourism travelers in Hau Giang province. The study used Cronbach?s Alpha testing, Exploratory Factor Analysis and Importance ? Performance Analysis. According to the result, the Performance of ecotourism achieved at only an average level; separately, the factor ?art and craft booth? reached a bad level as well as the longest service quality distance. In term of cultural tourism, almost all performance factors got to an average level; two bad level factors: traditional ceremonies, knowledge of staff at the destinations. The research focuses on IPA grid to give out solutions.

This study was conducted to determine the factors affecting the satisfaction of the community for the development of homestay tourism in the Mekong Delta Islets (MDI). Research data were collected from 218 households that homestay tourism development in four islets (Thoi Son, An Binh, Thanh Binh, Tan Loc). The Cronbach's Alpha test, exploratory factor analysis (EFA) and logistic regression were used in the study. Research results showed that, five factors affect the satisfaction of the community as "Physical and mental benefits", "Social capital", "Public utility service", "Environmental and health", "Local government". In particular, "Physical and mental benefits" are the most important factors affecting the satisfaction of the community for the development of homestay tourism in the Mekong Delta Islets.

This study aims to analyze the motivative factors of social responsibility practices of small and medium enterprises in Can Tho City. A structured questionnaire was used to collect data from 88 small and medium enterprises in Can Tho City. In this paper, research methods consist of descriptive statistics, frequency, medium; Cronbach?s Alpha Coefficient; KMO and Barlett test, exploratory factor analysis (EFA). Research results showed that motivative factors of social responsibility practices of small and medium enterprises consist of ?economic benefits?, ?macroeconomic policy?, ?moral responsibility?, ?community orientation?. Among them, ?moral responsibility? were the most motivative factor of social responsibility practices of small and medium enterprises in Can Tho City.

Using specific provisions in some legislation documents such as the Criminal procedure Code 2003 and the Act of Handling of Administrative Violations 2012, this article demonstrates that there are several mistakes in the determination signs of legal violations. More specifically, these legislations set out handling methods not in accordance with the nature of behavior. For example, criminal liability and criminal punishment exemption can be applied for behaviors which are not crimes. Besides, behaviors done in situations of legitimate defense, emergency and sudden event are considered as legal violations but authorities are not allowed to sanction such behaviors. This article helps to overcome some theoretical errors related to the concept of legal violation to avoid unnecessary conflicts, ambiguities in our country?s legal system.

An investigation was conducted in Cho Moi district, An Giang province with aiming to understand the situation and economic return of baby-corn farming models with GlobalGAP standard. A Participatory Rural Appraisal (PRA) exercises combined with household interviewing was applied in the research at two villages My An and My Hoi, Cho Moi of An Giang. Results from study showed that farmers growing baby-corn with GAP standard applied suitable level of inorganic and organic fertilizer. Fruit yield was high 2.5-3.0 ton/ha/crop. This model gave high net return with 22.6 million dong/ha/crop. The model of baby-corn farming with GlobalGAP integrated with cows raising produced higher economic return with 27.4 million dong/ha/crop, MBCR of GlobalGAP model   and traditional one was high. The models of baby-corn farming with GlobalGAP, showed highly appropriate, more benefit of social-environment, farmers acceptability, and  predicted to be promising model to this area.

This research was conducted in order to build the linkage model that helps prevent the agricultural risks on pig production of farmer households in Can Tho city. Data in the research were collected from 118 pig production households in Can Tho city. Research results from the analysis by using descriptive statistics method showed that pig production households in Can Tho city were affected by many production risks, marketing risks, and financial risks. Among these, the production risks and the marketing risks were the two most influential factors. Otherwise, the reaction of farmer households to the agricultural risks was limited and depended much on their experience. Therefore, the researchers have built the linkage model that connects the relevant groups of pig production including the Government, scientists, suppliers, traders, credit institutions, insurance companies, and farmer households to prevent agricultural risks and contribute to the sustainable development of pig production in Can Tho city.

The result of applying the theoretical framework on the Servqual scale (a scale measuring components of service?s quality) built by Parasuraman and is complemented by other authors showed that provides services not only statistical information purely administrative operation of the service, but also influenced by many marketable factors. Customers? satisfaction (users of statistical information) is impacted by several factors, the most important of which are: service cost, empathy, tangible means and reliability of users to provide statistical information service. The impact of these factors are quantified specifically in providing statistical information purely service model.