Improving the quality of teaching and learning political theory subjects in universities today is a matter of urgency. To be able to correctly assess the situation, then find a solution, the article went to find out through social surveys at the three universities in the Mekong Delta: the Can Tho University, An Giang University and Dong Thap University. Since then the author has found that the weakness of the teaching and learning of the subject of political theory has many causes, but in which the teaching methods of teachers are important factors. Author proposes need to use active teaching methods in teaching the subject of political theory. However, the methodological innovation can not be separated with the renovation of facilities, how organized and renewal mechanisms and policies for teaching, in which benefits are important issues.

In recent years, brown plant hopper was one of the serious pest and had caused a big lose of rice production in the Mekong Delta and South-Eastern region. Some rice varieties, which were selected by University of Can Tho and CBDC project were tested by NCVESC[1] in  Dry Season 2010 and Wet Season 2010 for evaluating their adaptability to BPH pressure in the Mekong Delta and South-Eastern region. The results showed that some varieties such as MTL512, MTL645, TP1, TP2 (in Dry Season 2010) and MTL480, MTL547, MTL661, MTL694, CM1, BL29, TP5, TP6, TC2 (Wet Season 2010) resisted to BPH at medium level (score from 3.7 to 5.0). In that group, MTL512, MTL645, TP1, TP2 resisted to BPH biotypes. Based on the agronomic characteristics, BPH infected capacity, and yield in many trial sites in the Mekong Delta and South-Eastern region, there are some promising rice varieties such as: MTL480, MTL547, MTL616, and MTL645.

The paper presents a novel algorithm basing on feedforward and feedback for controlling the nonlinear system. Feedback will generate transent command and feedforward with steady state command. Feedback is designed with PID (Proportional Integral Devirative) controller. Feedforward is trained basing on Gradient Descent Backpropagation neural network (NN) with adaptive learning rate. It is used to compensate for uncertain factors such as noise from the operation environment. The factors is usually not known before. Therefore the paper is proposed to use neural network for estimating the uncertain systems and mentaining the steadiness of the plant. The feedforward and feedback controllers are applied to control the direct current motor. The result from Simulink  simulation software of MATLAB is demonstrated that the responde of the plant tracks the desired signal with overshoot is mearsered 2%, and steady state error is measured ±3%, setting and steady-state time are negligible.

Rice varieties with high yield, adaption to various soil conditions are a major factor to improve rice production in theMekongDelta. In recent years, there is a bridge linked into rice breeder and farmers in the rice selection processing for selecting new rice varieties in theMekongDelta. Farmers were supplied the rice breed lines or they breeded rice lines by themselves; finally, they selected to new rice varieties with the best characteristics. Some farmer rice varieties having good characteristics such as: tolerance to acid sulfate soil, short duration, high yielding could be expansion in theMekongDelta were HĐ1, HĐ4, NV1, NV2. The combination of rice breeder and farmers for evaluating some farmer rice characteristics: pest resistance, stable yield, grain qualities is very important before promoting its to rice production and could expand farmer rice varieties to large scale. 

?Value chain analysis of rice product in theMekongDelta? based on an integrated approach of Kaplinsky and Morris (2000), Recklies (2001), GTZ ValueLinks (2007) and M4P (2007) along with direct interviews of 564 individual chain actors and 10 groups of rice farmers in the four research provinces. Research results consist of (1) Analysis of present rice value chain including domestic rice value chain and export rice value chain, (2) Chain economic analysis includes production cost, cost-added, value added, net value added (profit), chain income of each actor and the entire chain, (3) Analysis of risks, risk management and policy issues of the rice chain, (4) SWOT analysis focuses on strengths, weaknesses, opportunities and threats as well as examines rice chain quality problems. Finally, chain upgrading strategies of rice product are developed to improve chain value added, profit, income, competitive advantage and rice chain sustainable development in the Mekong Delta particularly and inVietnamgenerally.

The magnetite nanoparticle coated with SiO2 were synthesized by co-precipitation method. This nanoparticle has the spherical form with 20 nm size and saturated magnetization at 57 emu/g. The Magnetite nanoparticle (Fe3O4/SiO2) were crusted with GPTMS for enhancing adhesion of nanoparticle with antibodies in other to get early diagnosis for cancer treatment more efficient.

This research included the isolation of lactic acid bacteria from fermented foods and lyophilized bacteria products, the examination of ability producing antibacterial substances, H2O2 and bacteriocin by agar spot test and well diffusion agar test using the indicated Bacillus subtilis, the identification at genus level of the growth of bacterial isolates having high antagonistic activity based on the study of the growth of bacteria in different conditions of temperature, pH, NaCl, NaN3, manitol, gas production in fermentation from glucose and indole test. As the result, 46 strains of lactic acid bacteria were isolated and examined for production of antibacterial substances. 23 strains performed well the antibacterial activity against the indicator, of which, 10 strains were able to produce antibacterial substances. Strain DC213A was noted with the significantly highest antibacterial activity. 10 selected strains were classified belonging to the genera of Leuconostoc, Enterococcus, Lactobacillus and Streptococcus.   

Response of four okra varieties viz. VN1, ĐB1, TN75 and Local variety  was  studied  against Maruca testulalis at Can Tho university during 2010. The varieties exhibited  varied responses to attack of Earias spp.. There were significant differences among percent damaged buds, flowers and fruits of test varieties. Local variety proved comparatively to be more resistant showing less percent damage in buds (2,05%),  flowers (1,15%) and  fruits (3,12%). ĐB1 was comparatively found as susceptible showing more percent damaged buds (4,64%), flowers (4,32%) and  fruits (17,25%). These studies showed that Local varieties under test was resistant to infestation of Earias spp. Fruits were attacked more as compared to other parts of the plants, probably due to insect preference for food.

From fruits of Momordica charantia L., two compounds: uracil (I, Figue 1) and momordicoside K (II, Figue 2) was isolated from ethyl acetate extract. Their structures were elucidated by modern spectrometric methods and compared with published data.

In order to improve the quality of traditional sufu, researching on the optimal production of starter culture of Actinomucor elegans to be applied for sufu processing was performed. The results showed that the maximum spore - yield (1010 spores/g dry weight) of A. elegans was obtained with the treatment consisted of broken-rice and rice-bran with the ration 2:1, inoculated 105 spores/gdw, and to be harvested after 6 days of incubation at 30oC. The optimum drying temperature, drying time, and grinding time for the maximum amounts of live spores were 42oC, 48 hours, and 1 minute, respectively. After 5 months of preservation, the maximum of live spores (88.57%) was found at the treatment which was preserved at 4oC (in refrigerator) in polypropylene bag, its viable spores were decreased by 2.2% compared to the initial sample (90.77%). In contrasting, the treatment was preserved at 25oC (in desicator) in polypropylene bag, its viable spores retained lowest (80.65%), decreased by 10.12% compared to the initial sample. Based on the optimal data obtained, the flow-chart for optimal starter culture production (high spore-yield) and storage (high viable spores retained) was established, as a result, optimal starter culture of A. elegans has been produced to be applied to the sufu productive process to improve the quality of traditional sufu.

In vegetables-growing areas in the Mekong Delta (MD) in Vietnam, phosphorus fertilizer has been used at high rates. This may lead to the increase in available phosphorus (P) in soils and may result in low response of plant to P fertilizer. Objective of the study was, therefore, to investigate response of baby corn (Zea mays L.) to phosphorus fertilizer in major vegetables-growing areas in the MD in screen house condition. The experiment was designed in randomized complete blocks with 3 replications and 2 factors: (i)with and without P fertilizer application (90kg Pư2O5ư/ha and 0 kgPư2O5ư/ha, respectively), and (ii) soils which have low to high available phosphorus content by Bray 1 method in Thot Not ? Cantho (13.10 - 120.30 mgP/kg), Cho Moi? An Giang (6.82 - 87.22 mgP/kg), Binh Tan - Vinh Long (5.68 - 76.91 mgP/kg), and Chau Thanh Tra Vinh (4.12 - 223.97 mgP/kg). Results showed that in almost all soils, application of P did not increased plant height, stem diameter, dry biomass and yield. Except in some cases, plant yields had response to phosphorus fertilizer although soils had high P available content. Therefore the study should be conducted in more crops to confirm response of baby corn to P fertilizer in these soils, and the study on ability of P fixation/release in soils is needed for a good recommendation of P fertilizer rate in vegetables - growing areas in theMekong Delta.

Language is a picture of the world and the picture of each nation reflects the national views and perception about the world of the community. For example, an action "make an object out off dust/dirt", English use two verb "wash"/ ?clean?; while based on what kind of objects need to ?make out off stain? and specific features of the object, Vietnamese use many verbs for this action: ?rua?, ?giat?, ?chui?, ?cha? và ?xac?. "This difference shows Vietnamese divides relatively meticulously the world for the action "make an object out off dust/stain", and hence, reflects the life is mainly manual work in a particular historical period of the Vietnamese. Thus, with this category, thinking of Vietnamese quite subtle, deep and specific.

This study evaluated the effects of decreased salinities on the growth and survival rate of oyster (Crassostrea sp) and white leg shrimp (Penaeus vannamei) in integrated culture system. The experiment with 3 treatments and were run triplicates per treatment: 1) Maintaining salinity of 15? during 3 months (Control); 2) Maintaining salinity of 15? in the first month and then decreased to 10? in second month (NT2) and 3) Maintaining salinity of 15? in the first month and then decreased to 5? in third month (NT2). Results showed that white leg shrimp in control treatment with survival rate (69.5%) and yield (699 g/m3) were higher than that from decreased salinity treatments. Meat  (53.2%) and dry weight ratio (27.7%) of shrimps in stable salinity medium was significantly higher than those from NT2 (50.7 and 26.9%, respectively). Oysters showed highest survival rate in NT2 (86.7%), then NT1 (68.3%) and lowest in control  (41.7%). Our findings indicated that decreased salinity resulting in decreased survival rate, yield and quality of white leg shrimp. On the contrast, survival rate of oysters were high and their growth were not affected during decreased salinities.

Homogeneously ZnS nano-particles were accomplished by precipitation in water solvent with the aid of buffer solution at room temperature. Effect of pH and type of buffer solution were studied by theoretical; through experimental synthetic ZnS nanoparticles,  the optimal pH for reaction process was determined through X-ray diffraction measurements.

Total 30 samples of Phyllanthus niruri and 30 samples of Eclipta prostrate cultivated in different provinces of Mekong delta were collected for protein electrophoresis employing the SDS-PAGE method and tested for the antibacterial susceptibilities expressed as minimum inhibitory concentrations (MIC) of eight selected bacteria strains Staphylococcus aureus, Streptococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Salmonella spp. and Aeromonas hydrophila, Edwardsiella ictaluri and Edwardsiella tarda. There were 8 lines of Phyllanthus niruri and 11 lines of Eclipta prostrate were discovered. Their protein bands were 0.11% and 0.1% polymorphic while the polymorphic individuals were 0.4% and 0.07%, the phenotypic diversity value (Ho) = 5.31 and  2.61, the genetic diversity value (HEP) = 0.71 and 0.6 and sum of the effective number alleles SENA = 2.42 and 1.52 respectively. The antibacterial activity of Phyllanthus niruri was divided into 7 groups, all of them had the strong antibacterial activities against Edwardsiella tarda with MIC = 64-512 àg/ml and Aeromonas hydrophila MIC=512-1024 àg/ml. Eclipta prostrate was divided into 3 groups and had strong antibacterial susceptibilities against Edwardsiella tarda (MIC=256-512 àg/ml), Edwardsiella ictaluri (MIC=512 àg/ml) and Aeromonas hydrophila (MIC=256-512 àg/ml).

Directive No. 34 - CT / TW of the Politburo, the Party Central Committee "about strengthening the political and ideological activities; enhancing party organizations, mass organizations and party member development in educational institutions", dated 30/05/1998, has created a strong dynamics to develop the party in universities and colleges. Compared with the period before 1998 - Directive No. 34 - CT / TW, current years have shown the dramatic increase in party members at Can Tho University due to an active creation of in term of implementing the Directive. This article shows a review of development party member process in the University's students and some achievements of  Party of Can Tho University in the past 12 years.

This article presents some conceptions, theoretical results and algorithms for building clusters of the probability density functions. With programs written by Matlab, we solve the computing problem of clustering probability density functions. This technique can illustrate the real discrete data about the extra-practicing and studying marks of the students from CONS (College of Naturel Science), Can Tho University.

The use of starter cultures in winemaking has improved the reproducibility of wine quality. Based on the isolated yeast strains were isolated from palm juice (collected at Tinh Bien district, An Giang province), with the aim to select nutrient medium and identify yeasts, this study was performed to survey the viability of isolated yeast was grown in Sabouraud, Malt Extract Agar (MEA) and Potato Glucose Agar supplemented with Yeast Extract (PYGA) and perform a preliminary identification of isolated yeast strains. The results showed that Sabouraud medium was the most appropriate to be used for isolating and maintaining the yeast. Based on the classification keys of yeast, three genera of yeast such as Saccharomyces, Haseniaspora and Candida were identified.

Based on theoretical models of consumer loyalty and satisfaction, this study aims to consider relationship between service quality and satisfaction of consumer of mobile phone service in Nha Trang city, Vietnam. The research was conducted from a sample of 388 consumers in Nha Trang city. Scales of the research was developed through exploratory factor analysis and Cronbach?s alpha test. The reliability, discrimination of constructs and proposal hypotheses were tested by structural equation modeling. Results of the research show that models of consumer satisfaction fit well with the data, and consumer satisfaction of mobile phone was influenced positively by five factors including call quality; value added service; convenience; perceived price and consumer service.

Treating catfish fat based methyl esters with ethanolamine or ethylenediamine at elevated temperature has led to the formation of N-(2-hydroxyethyl)amide (4) or N,N'-(ethane-1,2-diyl) dienamide (5), respectively, in good to reasonable yields. These types of fatty alkanolamide showed good surface activities. Upon oxidation using HCOOH/H2O2 system, the carbon-carbon double bonds on the hydrocarbon side chains were successfully epoxidized and subsequently undergone ring opening to form the corresponding formyloxyhydroxy and dihydroxy ester products. This mixture was then directly treated with ethanolamine or ethylenediamine to afford the final dihydroxy N-(2-hydroxyethyl) amide (6) in good yield although an extra formate hydrolysis step was necessary in the synthetic case of (7). The introduction of the hydroxy groups in fact brought benefit by increasing the surface activities of the synthetic alkanolamide and alkanediamide surfactants.

Six surface soil samples having different fertility levels were taken in the MekongDelta. Four extraction methods (CaCl2, DTPA, Mehlich II and Mehlich III) were used to extract the availability of K, Ca, Mg and Mn in soil. The same soil samples were also used to grow rice in a pot experiment. Fertilisers applied for this experiment were N and P. Rice plant was harvested at 40 days after sowing to analyse the absorbed amount by plant. Results showed that at Sprint-Winter crop (ĐX), the correlation coefficient R2 found  between K-absorb and extracted -K was over 0,8 for CaCl2 and Mehlich II methods; Mehlich III had R2=0,9, no correlation was found with DTPA method (R2=0.02), in the Summer-Fall crop (HT), R2 was very high ( 0.96) for Mehlich III, Mehlich II was R2 = 0.93 and CaCl2 was 0.88 and DTPA was R2=0,05. For Ca, ĐX crop, Mehlich III had R2 =0.43 higher than Mehlich II (R2 = 0.28), but at HT crop, both extracted methods had R2 higher than ĐX crop (R2#0,5). For Mg, ĐX crop, Mehlich II had R2 highest compared to other methods (R2 = 0.55), the next was CaCl2 method (R2 = 0.54) and Mehlich III had R2 = 0.36 and the lowest was DTPA method (R2 = 0.14); at HT crop, R2 was increased compared to ĐX crop, Mehlich II method had R2 =0.87, CaCl2 method was 0.82, Mehlich III was 0.77 and the lowest was DTPA method (R2 = 0.51). For Mn, ĐX crop, Mehlich III method had R2 = 0.59, the next was Mehlich II (R2 = 0.58), CaCl2 (R2 = 0.31) and the lowest was DTPA method (R2 = 0.04); HT crop, Mehlich III had R2 = 0.89, the next was Mehlich II (R2 = 0.85), DTPA was R2 = 0.29, CaCl2 found not correlated (R2 = 0.07). Mehlich III was the promising method to be used to extract multi-available nutrient in soil in theMekong Delta.

With the aim of using ?sim? flowers for tea production as bottled tea, the survey was made, including the change of fermented time (0á14 hours), drying temperature (50á70oC) and the concentration of potassium sorbate (0.025á0.1%) used for storage dried tea. Selection of manufacture formulas of bottled ?sim? flower tea with sugar content (9á11%) and citric acid content (0.025á0.2%) and storage capacity of tea at room temperature were also interested in this study. Research results showed that the fermentation of sim flowers for 10 hours and drying at 60oC gave best product quality (in terms of color and tannin content). The quality of ?sim? flower tea was maintained at least 30 days without using preservative. In addition, bottled ?sim? flower tea was best processed with sugar and citric acid addition of 10% and 0.15%, respectively. Sim flower tea was stored at room temperature for a long time.

Cai Rang floating market is one of the famous tourism destinations in Can Tho City in specific and in TheMekongDelta in general due to its potential attraction. Tourism activities has been developed for a long time and brought many benefits. However, there are many drawbacks which come from the local people, tourism stakeholders, tourists and tourism industry in Can Tho City? They are not pay enough attention to protect and invest in the right methods. In this article, thanks to the primary data and secondary data the author will carry out the potential and reality on tourism development in the market. The writer also analyses strengths, weaknesses, opportunities, threats and solutions to overcome the difficulties in tourism developing at Cai Rang floating market.

A study on artificial propagation of Cirrhinus jullieni was conducted at the National Breeding Center for Southern Fresh-water and Cantho University. Broodfish was culture in the earthen pond and fed by a combination of rice brand (70%) and fish meal (30%). Fish were matured after 4 months. The differences between male and female were recognized only in matured broodfish. Using different hormones to stimulate fish spawning were carried out. At the doses of 1.500, 2.000 and 2.500 UI/kg of fish, HCG could not succeed in fish spawning. Using carp pituitary gland at 2, 4 and 6 mg/kg as well as the combination of carp pituitary gland and HCG at 2 mg + 1.500 UI, 2 mg + 2.000 UI, 2 mg + 2.500 UI per kg of female broodfish got the same result with using only HCG in previous experiment. C. jullieni released the eggs when using LRHa + DOM at 60 and 80 àg/kg or a combination of 2 mg of carp pituitary gland and 40 and 60 àg/kg. Fecundity, hatching rates and fertilization rates among treatments were not significantly different (P>0.05). In treatments using LHRHa + DOM at 80 àg and 5mg or 2 mg of carp pituitary gland and 80 àg LRH / perkg of femal broodfish got the good values of fecundity (419,000 and 458,000 eggs/kg female broodfish), mean fertilization rate (67,7 and 70.8%) and hatching rate (75,2 nad 72.9%).

ZnS nanoparticles were hydrothermally synthesized at 200 °C for 4 and 7 hours using sodium thiosulfate (Na2S2O3) and zinc chloride as initial materials. Scanning electron microscopy (SEM) images showed the co-existance of individual ZnS nanoparticles and microspheres formed by the nanoparticles. When acrylamide was added to the hydrothermal synthesis process as a surfactant, ZnS porous nanospheres were obtained. X-ray diffraction (XRD) revealed that the average size of ZnS nanocrystallites, estimated by the Debye-Sherrer formula, was about 4 nm. Photoluminescence excited (PLE) spectra of the material exhibited two blue shifts (~ 64 nm and ~ 24 nm) compared with the Photoluminescence (PL) peak of bulk ZnS. It is known to arise due to quantum confinement effect.

Total 30 leaf samples of  Melaleuca leucadendra cultivated in different places in Kien Giang province were collected. Their leaves were used for protein electrophoresis employing the SDS-PAGE method and tested for the antibacterial susceptibilities expressed as minimum inhibitory concentrations (MIC) of  eight selected gram positive and gram negative strains: Staphylococcus aureus, Streptococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., Aeromonas hydrophila, Edwardsiella ictaluri and Edwardsiella tarda. There were 11 different protein bands of these 30 leaf samples were discovered. Protein bands were 16.7% polymorphic while the polymorphic individuals were 9% and the phenotypic diversity value (Ho) was 3.30, the genetic diversity value (HEP) was 0.71 and sum of the effective number alleles (SENA) was  2.44. Melaleuca leucadendra could divide into 10 lines with the antibacterial susceptibilities were best against Staphylococcus aureus (10 lines with MIC=32àg/ml), Streptococcus faecalis (3 lines with MIC=32àg/ml), Aeromonas hydrophila (4 lines with MIC=32àg/ml), Edwardsiella ictaluri and Edwardsiella tarda (3 lines with MIC=64àg/ml) and Pseudomonas aeruginosa (4 lines with MIC=256-512àg/ml). All Melaleuca leucadendra lines nearly have no effect against Escherichia coli and Salmonella spp. Melaleuca leucadendra is a potential medicinal plant for humans and animals and the difference in lines and the antibacterial activities must be taken into account.