To understand about genetic traits of the two seedless Duong tangerine trees discovered in Mekong Delta (Nguyen Bao Ve et al., 2007), this study was carried out: (i) to find a suitable markers to identify and (ii) to determine the genetic relationship between two seedless Duong tangerine trees and with seedy Duong tangerine trees. The sequence analysis results from ITS region and MatK gene showed that they were similar in seedless and seedy Duong tangerine trees. By RAPD using seven primers (A13, OPH13, SO15, SN20, A02, OPH18 and SN06), there were different bands presented in gel, these makers to identify seedless and seedy Duong tangerine trees, SO15 and A13 primers might use to determine between seedless and seedy Duong tangerine trees, SN06 and SN20 primers might use to distinguish two seedless Duong tangerine trees and seedy Duong tangerine tree; therefore, the genetic relationship between two seedless trees was tightly close (0,92) and closely with seedy tree (0,87).          

We study a bifurcation of codimension-two equilibria occurring in a thermal convection model, and relating to heteroclinic cycles with a resonant condition among eigenvalues of the equilibria. By a combination of Lyapunov-Schmidt  method, foliation and dynamical system theory we completely analyze bifurcation phenomenon. Numerical investigations by using the software AUTO and Mathematica show the correctness of the obtained results.

Study on the identification of the economical characteristics and their parameters that were used for economic quantitative land evaluation and the linkages between physical land evaluation and economic quantitative land evaluation that is a basis for effective and sustainable land use planning at district level was the objectives of this study. Results of study showed that economic quantitative land evaluation with two economical characteristics of gross-margin and B/C gave the results that four economical quantitative suitability zones of eight land use types and thirty two land mapping units were established. This showed that the results of physical land evaluation can be as a basis for economic quantitative land evaluation. From those results of physical land evaluation can be compared with characteristics of gross-margin and B/C of economic quantitative land evaluation per each land mapping unit, from that zoning of physical suitability and economical suitability can be done.Results of study also showed that the software of ALES, IDRISIW, PRIMER, and MAPINFO can be used for physical land evaluation that was a basis to link with economic quantitative land evaluation. By application of GIS for economic quantitative land evaluation showed that the role of GIS in supporting for land use planning based on results of physical and quantitative land evaluation. From these results of study, the procedure of linkage between physical land evaluation and economic quantitative land evaluation was proposed.

Under the Marriage and Family Law 2000, the courts must take into consideration parties? contribution including both financial and non-financial contribution in dividing matrimonial property upon divorce. Originally, the term of contribution involves two meanings, namely positive and negative contribution. However, basically, any contribution by parties to matrimonial property is usually taken into account as positive contribution rather than negative contribution which is also considered as spousal faults of. Moreover, the factor of domestic violence that is usually happened in family has significant effects on spousal contribution as well as division of matrimonial property. Therefore, both these factors should be considered in matrimonial proceeding in order to not only make the division of matrimonial property more equitable but also prevent domectic violence.

Applying a commercial enzyme (pectinase) to increase juice yield and investigating optimal fermentation conditions (yeast concentration, pH, temperature) for mango wine production were addressed to this research. A pectinase preparation was used at a level of 0.15% to facilitate the extraction of mango juice. The incubation time was 20 minute at pH 4.5 and 40oC. Results indicated that the use of enzyme was beneficial as it gave the highest juice yield (over 75 ml/100g). Mango juice was best fermented at pH 4.5 and temperature of 20oC for 12 days with a dilution factor of 2, using 0.3g/l of yeast. The ethanol concentration ranging from 10 to 11% was obtained.

Starting from the need for aromatic rice varieties, high yield, good quality in order to diversify sources of high quality seeds for the Mekong Delta. TP9 rice varieties were bred from the combination of hybrid rice varieties KhaoDawkmali x Amaroo and have short growing period (80-82 days) and quality (protein 7.2%, 17.3% low amylose) was crossed with the same Jasmine rice, yield TP5 (Jasmine-85 x Amaroo). The cross was made in 2009. In F5 generation (F5 plants, seeds F6) lines were selected as aromatic rice, high yield potential, good quality and pure (selected by means of SDS-PAGE protein, check the aromatic 1.7% KOH method and analysis based on the quality of biochemical methods). THL-13-02-09 lines produced the highest potential yield (6.7 tons / ha, for DX), with high protein content (12.8%), low amylose (17, 5%), long graing (8.3 mm, with expression relatively pest resistance and stable aroma.

The study aims to analyze business efficiency of the Dinh Yen sedge mat weave handicraft village in Dong Thap province. The findings show that the handicraft village bring much economic and social efficiency. The results of discriminant analysis indicate that nature of operation, number of labor, working capital, equity capital, and numbers of product are factors that discriminated income of handicraft households. Additionally, the outcomes of linear regression analysis show that number of labours, working capital, and nature of operation (hand or machine weaving) are important factors affect income of handicraft household. Finally, the study gives some suggestions in order to enhance efficiency of the Dinh Yen handicraft village.

Stemming from the need to expand the growing rice area to Phu Tan district - An Giang province, and diversify to create the same delicious typical rice style. NK2 seed collected from this area, the purifying method and selected by SDS-PAGE approaching to high yield, good quality. The experiments including 5 pure lines were carried out two seasons (Winter Spring 2008-2009 and summer- Autumn 2009) by RCBD with three replications. Results showed that 1 elite lines was chosen. Yields ranged from 6.5 to 7.5 ton/ha, low amylose content 10%.

The creation of the interestingness measures for evaluating the quality or the degree of interesting of the knowledge in the form of association rules play an important role in the postprocessing of association rules the Knowledge Discovery from Databases (KDD). Along with the more interestingness measures are proposed on both subjective assessment (subjective interestingness measures) and objective assessment (objective interestingness measures), the study of the properties or attributes on the interestingness measures will play an important role in understanding the nature of the objective interestingness measures interested. In this paper, we focus primarily on the objective interestingness measures to have a general view on the recent researches on the nature of the objective interestingness measures and at the same time to complete a new classification on the 40 selected objective interestingness measures on the properties studied/founded.      

Common Swamp Pitcher-Plant (Nepenthes mirabilis) is a medicinal herb of Nepenthaceae family. This plant is also used for ornamentation thanks to the special form of leaves that the veins form pitchers which are able to trap and consume insects. Micropropagation of Common Swamp Pitcher-Plant was carried out through induction of axillary buds from nodal explants and formation of shoot clumps. The results showed that Wood Plant Medium (WPM) was better than MS in inducing axillary buds, with 67.7% of shoot formation in comparison with 34.4% of MS medium. The development of shoots from nodes was no significant difference between control treatment (without plant growth regulators) and levels of NAA and BA. These induced shoots developed into shoot clumps with 81.3% on WPM supplemented with 0.05 mg/l NAA and 8 mg/l BA after 60 days cultured.

The study aims at analyzing the economic efficiency of semi-industrial backyard chicken raising model in Chau Thanh A district, Hau Giang province. Research data were collected from 90 households raising backyard chicken in semi-industrial model in Chau Thanh A district. Research methods include descriptive statistics, cost-benefit  analysis (CBA) and linear regression analysis. Research results show that the model brings high economic efficiency for households. The variables of costs of chicken breeds, food and medicine is negatively correlated with the profitability of the raising model, while the variables of raising scale, education level and technical training is positively correlated with the model profit. The study also proposed some recommendations for improving the economic efficiency and development patterns of semi-industrial backyard chicken raising model in Chau Thanh A district.

Using benthic invertebrates to assess the pollution on the Tambot canal (Longxuyen) caused by domestic waste was investigated from 2007 to 2008. The result showed that the benthic taxa was poor  with 11 species belong to 5 groups including oligochaete, polychaete, insect, gastropod and bivalve in this area. The density of benthic invertebrates was very high fluctuating from 450 to 26220 ind/m2 by the mostly contributing of Limnodrilus hoffmeisteri. The biomass of benthic invertebrates was mainly obtained from biomass of bivalve species. The result of analyzing the similarity by PRIMER V at the 30% level is similar to the assessment of the organic pollution according to RBP III.

The paper summarizes one year of research and development activities at the College of Engineering Technology, Can Tho University. These activities of faculty and students will be summarized and evaluated. The paper?s data is excerpted from the annual college conference in school year 2010-2011. Results showed that, after one year, faculty and students proposed and obtained 27 scientific research projects with funding level approximately 50% of the annual college total budget; published 02 books, 11 papers in national scientific journals, 17 articles in international journals and 22 papers in the academic conference proceedings. Finally, this paper also pointed out some opportunities and challenges in order to call for the cooperation and dedication.

This study was conducted to evaluate the effects of decreased salinity on the growth and proximate compositions of red seaweeds. Two tropical red seaweeds, Gracilaria tenuistipitata. and Kapaphycus alvarezii were cultivated in 50L-tanks with water level of 60 cm and aeration to distribute  equally nutrients in the culture medium. Experiment was designed with 6 treatments on 2 seaweed species and triplicates were run per treatment: 1/Cultivating seaweeds at salinity of 30? during experiment; 2/Cultivating seaweed at 30? and then decreasing to 20? from second month; 3/Cultivating seaweed at 30?, decreasing to 20? in second month and then to 10? in the last month. Results showed that water temperature, pH, NH4, NO2 and NO3 were not significant differences among treatments (P>0.05). After 90 days of cultivation, biomass of G. tenuistipitata was decreased in all treatments, especially at 20? (81.1%) and 10? (77.5%). Protein content of G. tenuistipitata was decreased together with salinity, however lipid did not changed and carbohydrates showed opposite strategy. Biomass of K. alvarezii decreased when salinity decreased to 20? but it increased at salinity of 10? (2.5%) and 30? (14.3%). Protein content of K. alvarezii was not affected by salinity, however lipid and carbohydrates increased when the salinity decreased gradually.

From the ethyl acetate extracts of the aerial parts of Eupatorium odoratum L. from Phu Yen province, two of flavonols (rhamnocitrin and rhamnetin) were isolated. Their structures were interpreted from spectra including IR, 1H-NMR, 13C-NMR, HSQC, HMBC, MS and based on published data. These flavonols were tested for antioxidant activity by DPPH method. The result showed that their antioxidant activity is similarly strong.

This paper introduces a new approach on integrated solid waste management to implementate the Decision 2149/QĐ-TTg on ?Approving the Nation strategy for Integrated management of solid waste up to 2025, with a vision to 2050?. The integrated waste management is an advance approaching to suppy a general viewpoint on waste planning and management options. In addition, this method describes the link between the solid waste management and relevant aspects such as nature, socio-economic, institution and stake-holder groups, especially the connection to climate change - the most considered environmental problem. Based on the analysis of current situation of solid waste management, the solutions for integrated solid waste management are integratively suggested and discussed. This method is considered as a good orientation for solid waste management activity at developing countries or countries with shift economic background.

In the primary survey results on the using of ?two self-study periods? at Cantho University, 85% students  agreed that ?two self-study periods? is the time for them to do exercises, do part-time jobs related to their major which can help them to enlarge their knowledge before graduating. Furthermore, about 72% students admitted that the use of ?two self-study periods? of students at Cantho University is effective while others think that they cannot use this time effectively because of many reasons such as teaching and evaluating methods of lecturers, too many courses in one semester, etc. To solve these problems, students suggest that managers, lecturers and leaners should find some solutions for themselves. Among these, 75% students state that leaners play the most important role to answer this issue, followed by administrators and lecturers.

The study was conducted on the prevalence of Salmonella in lizards (Hemidactylus spp.) in some households and animal farms at some districts in Cantho city. In a total 416 lizard? feces samples, 63 samples were Salmonella positive in rate 15,14% which was  higher than that environmental samples 7,89% (15/190). The prevalence of Salmonella in lizards collected from farms (25,00%) was higher than that in the households (11,86%).  Nine Salmonella serovars were identified in lizards and environment around residence of them. Of these, 8 serovars were present in lizards which predominant serovars were S. Weltevreden (23 samples), S. Lexington, S. Newport (8 samples each), S. Brunei (4 samples). Besides, S. Weltevreden was also found in insects, animal feed, and two strains of S. Newport, S. Brunei isolated from animal feces.

This article studies about the stability of a model of labor market in a discrete dynamical system. The model is characterized by an one-dimensional map with a unique fixed point. We proved the existence of periodic solutions, aperiodic solutions and homoclinic orbits. Sarkovskii's theorem, period doubling bifurcation and Markov chain are used to show the existence of chaotic phenomenon in the model.

Dischidia rafflesiana Wall. is a medicinal plant of Asclepiadaceae subfamily (Apocynaceace family). In vitro propagation of Dischidia rafflesiana Wall. was conducted through calli, somatic embryos and plantlets. Two experiments were carried out on plant growth regulators auxin and cytokinin. The results showed that induction of calli from young stem segments achieved 100% on MS medium (Murashige và Skoog, 1962) supplemented with 2,4-D 0.5, 1, and 1.5 mg/l in combination with 1 mg/l BA after 30 days cultured. Transfer of these calli to MS medium added with NAA and BA resulted in successful somatic embryogenesis. Plantlet formation observed on MS medium supplemented with 2 mg/l BA and NAA 0.05 mg/l and 0.1 mg/l, at rate of 12.5% and 25% respectively.

The study examines domestic tourists? satisfaction with tourism in Soc Trang province. Likert scale (from 1 ? Very dissatisfaction to 5 ? Very satisfaction) is used to measure tourists? satisfaction with components of Soc Trang tourism product. The study also uses descriptive statistic analysis to determine tourists? satisfaction. In addition, Willingness to Pay method is used to measure tourists satisfaction with their expenditure while traveling in Soc Trang province. The results identify situation of Soc Trang tourism and domestic tourists satisfaction, hence the study give some solutions in order to enhance tourists satisfaction level and to develop Soc Trang tourism efficiency.

Interactive whiteboards (IWB) have been produced and widely used in the world. In Vietnam, IWBs are rarely used because their price is still high. With the development trend in education in Vietnam recently, more and more teachers use Powerpoint with projectors as the main teaching method. However, this method also has some weaknesses, especially when the lecturer wants to present his or her ideas by handwritten method.  Therefore, it is necessary to find out a solution to add IWB?s functionalities to a projector-computer system or a LCD-computer. That is the reason why we have carried out this project.

Some morphological and biological characteristics of Omphisa anastomosalis Guenée were investigated under the laboratory and greenhouse conditions at Department of Plant Protection, Can Tho University. Results showed that an O. anastomosalis female laid averagely 244.6 eggs with the average ratio of egg hatching was 16.25%. Otherwise, the life cycle of O. anastomosalis was 34 ? 41 days (average 36,8 days), in which egg stage was  3 ? 4 days (average 3,35 days);   larval stage was 18 ? 25 days (average 19,85 days); pupal stage was 11 ? 12 days (average 11,6 days); and the time from eclosion to a female starting to lay eggs was 2 days.

An Giang is one of the leading provinces of Mekong Delta in producing rice for commercial. However, in this process, farmers still face many problems such as high competition, difficult consumption,... ?Four houses? or four actor?s linkage is considered as a viable solution for rice production and consumption process; However, it also has many constraints in implementation. These are reasons why the research has been conducted in order to (1) analyze and identify the c-onstraints and opportunities in rice production and consumption process (2) analyze and assess the linkage or relationship level of four houses and (3) give some suggestions for enhancing the relationship level between four houses in rice production and consumption process. Results from the study show that in rice production and consumption process, farmers still face many constraints such as a lack of quality seeds sources and investment capital, unstable of input prices and ?high yield but low price? issue. Regarding to ?four houses/actors? linkage, the relationship level between four actors is generally still poor, especially final decision making actors. However, local government enthusiastically support and participate in the process ? the actor who determine to success and efficiency of the linkage.

This study was conducted to survey the Avian Influenza (AI) outbreak, virus circulation and initialized to analysis 2 gene segments such as HA (H5) and NA (N1) of AI virus (H5N1) at Ca Mau and Soc Trang provinces. They were amplified by Realtime RT-PCR and sequenced. The prevalence of AI virus, subtype H5 in Soc Trang was 1.67%, only in ducks and was not detected AI virus, subtype N1. The prevalence of AI virus, subtype H5 in Ca Mau was not detected. A total of 4 H5N1 samples at two provinces were isolated and their genome sequenced. Homology between two gene segments of 4 samples were evaluated by sequence comparision. By compairing with H5, N1 gene segments isolated in Vietnam and Asia countries, they were showed that homologous nucleotide and amino acid reached 92 ? 98% in H5 gene segment and 92 - 99% , 91 - 99%  in N1 gene segment, respectively. It was noteworthy that full-length H5, N1 gene segments were closely related to Guangdong strain which had origined from China.

This study aims to develop an adaptive PID controller for unknown nonlinear control system. The PID controller is constructed as a linear neuron that three input weights of neuron work as three parameters Kp, Ki and Kd of the PID controller. Applying an online learnning algorithm for this neuron allow self-tuning the PID controller adapting to behaviors of system dynamics. This training algorithm needs Jacobian information, the sensitivity of plant output on the controlled input, to calculate the gradients for updating weights of the signle neural PID. Jacobian values are estimated through a recurrent fuzzy neural network non-parametric model identifier. This model identifier is also trained by an online learning algorithm using the Gradient Descent method. Simulation results on the ball and beam system indicates that the system response satisfies the control performance without overshoot, zero error steady-state, and obtaining the rise time within 0.3±0.1 seconds.

Pseudomonas sp. BT1 or Pseudomonas sp. BT2 strains had replace 25-50%N when they had innoculated on high-yield rice growing in in-pots, affect significantly on the number of shoots and rice weight (harvested in each session compared to controls). The experience of mixing of two strains were more effective than individual treatment of each strain, replacing 50-75%N.

The investigation was conducted in 11 locations having mangrove forests in 4 communes belonging to Phu Quoc National Park. From the results collected, we constructed the list of vascular plants including 103 species belonging to 80 genera of 41 families in 3 phyla, including 23 basic salt-tolerant species, 22 salt- affected species and 58 domestic species which were distributed to coastal saline areas. There were 10 species to be added to the list of Phu Quoc National Park. A resource of useful trees and endangered-trees was also investigated in which 98 useful species accounted for 95.15% of the system, 4 species taking up 3% of the system have been identified in Vietnam Red Book (2007). Moreover, 5 habitat patterns were identified in the mangrove forest ecosystem of Phu Quoc National Park.

This research is carried out in 2011 in a framework of collaborative research project among World Bank, Mekong Delta Development Research Institute and Can Tho University of Medicine and Pharmacy. By employing methods of secondary data analysis and interviewing local nutritional experts, the research has achieved a paradox that producing more food is not always good effective for rural development in general and child malnutrition prevention in particular. Many reasons are directly causing high child malnutrition rate in the Mekong Delta; however, generic causes are poverty and underdeveloped rural region. Government as well as local authority should increase financial support for child malnutrition prevention program, in which, in the short term, it should deliver to improve allowance for grass root collaborators and courses of maternal nutrition knowledge.     

The application of the credit-based system atCanthoUniversitymoderately influenced on the activity of the youth branch including manager and youth members. The primary results of the survey on the realistic situation and the way to form ?an activity model for the youth branch? at Cantho University showed that approximately 87.57% youth members deeply understand about the time of meeting each month (at least once); 98.00% members agreed  that participation in the youth activity is very helpful and meaningful not only for their study but also for their work after graduating from Cantho University. However, 15% youth members do not want to join the activity of the youth branch occupies the highest point, at about 84.00%. The difference timetable was one of the main cause of this problem. Therefore, finding the way to form ?an activity model of the youth branch? based on the credit-based system atCanthoUniversitywas necessary.