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Search Results: 1 - 10 of 1290 matches for " Doan Thi Nhu Trang "
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Applying the DRC (Domestic Resource Cost) Index to Evaluate the Competitive Advantage of Dak Lak Coffee  [PDF]
Hoang Tuan Minh, Doan Thi Nhu Trang, Jiancheng Chen
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102727
Abstract:
In the past few years, the volatility of the world price market and the intrinsic weaknesses of production coupled with skepticism from experts as well as households had effects of coffee production [1], that’s why the purpose of the article is to use index DRC (Domestic Resource Cost) to confirm the effectiveness of the coffee plantations in Dak Lak, through DRC index we not only assess competitive advantage of the coffee over other crop products in Dak Lak but also can find agents that affect competitiveness and find a way to enhance the competitiveness of products. The result of the research confirms that comparative advantages of coffee products are very sensitive to fluctuations in the price of coffee exports.
Input Factors to Sustainable Development of Coffee Production in the Dak Lak Province  [PDF]
Hoang Tuan Minh, Doan Thi Nhu Trang, Jiancheng Chen
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1103187
Abstract:
Coffee has brought income for many households and significantly contributes to annual GDP growth of the Dak Lak province. The majority of households have said that water sources, soil quality, coffee caring techniques, capital, and cultivation experience are important for the sustainable development of coffee production [Table A1]. We used linear function and Cobb-Douglas functional form to analyze the factors affecting the sustainable development of coffee. The production has shown that capital, labor, and land are important factors contributing to improving coffee productivity. The impact assessments of certain factors, such as agricultural equipment, knowledge of farmers, and the investment of capital, are essential for researching sustainable coffee development. Furthermore, the research results will provide some useful information for those working in the agricultural sector management, the agricultural extension center, and the coffee-growing households in investing, planning and development of Dak Lak coffee to reach high yielding, stable and more efficient in the future.
Direct versus Indirect Explicit Methods of Enhancing EFL Students’ English Grammatical Competence: A Concept Checking-based Consciousness-raising Tasks Model
Trang Thi Doan Dang,Huong Thu Nguyen
English Language Teaching , 2013, DOI: 10.5539/elt.v6n1p112
Abstract: Two approaches to grammar instruction are often discussed in the ESL literature: direct explicit grammar instruction (DEGI) (deduction) and indirect explicit grammar instruction (IEGI) (induction). This study aims to explore the effects of indirect explicit grammar instruction on EFL learners’ mastery of English tenses. Ninety-four eleventh-graders were conveniently selected and randomly assigned into either the experimental group (EG) or the control group (CG). A pre-post tests design was used to collect the data. Before and after the treatment, the following tests were administered: rule analysis, grammar, and speaking. A delayed written test was given to both groups to assess students’ retention of structure acquired; in addition, a questionnaire was provided to the EG to investigate their perception on the treatment. The results indicated that the EG significantly outperformed the CG in the analysis of grammar rules and the oral proficiency, except for the use of grammar structures in a pre-defined context. Convincingly, there was a positive correlation between the grammar rules and their subsequent use. This validates the cause and effect of grammar rules’ acquisition and the use of them in receptive and productive stages. Also, the EG had favorable attitudes towards the instruction. This study may provide practical implications and techniques for improving EFL students’ grammar performance in high schools in Vietnam.
Positive definite preserving linear transformations on symmetric matrix spaces
Huynh Dinh Tuan,Tran Thi Nha Trang,Doan The Hieu
Mathematics , 2010,
Abstract: Base on some simple facts of Hadamard product, characterizations of positive definite preserving linear transformations on real symmetric matrix spaces with an additional assumption "$\ra T(E_{ii})=1, i=1,2,..., n$" or "$T(A)>0\to A> 0$", were given.
Preparation and Biological Properties of Platinum(II) Complex-Loaded Copolymer PLA-TPGS
Ha Phuong Thu,Phan Thi Hong Tuyet,Mai Thi Thu Trang,Nguyen Hoai Nam,Truong Thi Nhu Hieu,Le Quang Duong,Tran Thi Nhu Hang,Tran Thi Hong Ha,Do Huu Nghi,Le Huu Cuong,Le Mai Huong
Journal of Nanomaterials , 2013, DOI: 10.1155/2013/768628
Abstract: A new nanodrug system containing bis(menthone thiosemicarbazonato) Platinum(II) complex (Pt-thiomen) encapsulated with the block copolymers polylactide-d-α-tocopheryl polyethylene glycol 1000 succinate (PLA-TPGS) was prepared by a modified solvent extraction/evaporation technique. The characteristics of the nanoparticles including surface morphology, size distribution, structure, and biological activities such as antimicrobial and cytotoxic activities were in vitro investigated. The spherical nanoparticles were around 50?nm in size with core-shell structure and narrow-size distribution. The encapsulated Pt-thiomen can avoid interaction with proteins in the blood plasma. The inhibitory activity of Pt-thiomen-loaded PLA-TPGS nanoparticles on the growth of some bacteria, fungi, and Hep-G2 cells suggests a possibility of developing PLA-TPGS-Pt-thiomen nanoparticles as one of the potential chemotherapeutic agents. 1. Introduction Platinum(II) complexes, one of the most potent anticancer drugs, have been used for treatment against a variety of human cancers [1, 2]. They are effective cytotoxic agents in the treatment of epithelial malignancies such as lung, head and neck, ovarian, bladder, and testicular cancer [3]. However, their clinical applications is restricted because almost all platinum in the blood plasma are often bound by protein after intravenous injection [4]. The binding of Pt(II) complexes with proteins reduces the urinary excretion of platinum and causes the deposition of Platinum in tissues [5]. The action with proteins causes many side effects including renal and auditory toxicity, nausea, and vomiting [6–8]. The development of drug delivery systems in the last several decades has provided a variety of methods including the incorporation of drugs into liposomes, lipid emulsions, and polymeric micelles to reduce adverse effects, to increase their solubility, and to prolong circulation time as well [9–12]. More recently, a promising approach which has attracted much attention of researchers is the encapsulation of platinum-based anticancer drugs in sterically stabilized polymeric micelles. This strategy has succeeded in reducing toxicity and improving efficacy of encapsulated platinum complex due to an excellent stability in plasma and a much longer circulation time as compared to free Pt(II) complexes [13–16]. The in vitro test on antimicrobial activity of the series of platinum(II) complexes by the macrodilution method was also reported by Utku et al. [17]. Some synthesized complexes might be taken into consideration as promising antifungal
Fabrication and Characterization of Pulp/Chitosan Composite Membranes Crosslinked with 3-Methylglutaric Anhydride for Pervaporation of Ethanol/Water Mixture  [PDF]
Truong Thi Cam Trang, Nguyen Thi Nhung, Takaomi Kobayashi
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.32014
Abstract: Chitosan/Cellulose (CTS/CL) composite membranes were prepared by cross-linking reaction with 3-methy- lglutaric anhydride (3MGA). The cross-linked membranes with CTS/CL were obtained at different CTS con- tents in variations from 50 to 100 wt%, and these membranes were applied in the dehydration of ethanol/wa- ter mixtures. Especially, it was observed that in the case of a composite membrane containing chitosan 80% (CTS/CL-80/20) showed a performance with a separation factor of α = 17.1 and a total permeation flux of J = 326 g/(m2h). It was observed that the total permeation flux decreased when the cross-linking increased and the increase in the ethanol content in the feed solution showed an increase in the separation factor. The CTS/ CL-80/20 showed excellent performance with good mechanical strength and dehydration performance in the ethanol/water mixture separation.
Food Security versus Food Sovereignty: Choice of Concept, Policies, and Classes in Vietnam’s Post-Reform Economy
Tran Thi Thu Trang
Kasarinlan : Philippine Journal of Third World Studies , 2011,
Abstract: This article discusses two important concepts of food security and food sovereignty in the context of Vietnam’s post-reform economy. It examines Vietnam’s persistent choice of the food security framework, its resulting policies and their implications. The article argues that the choice of food security framework has served to justify the promotion of industrial agriculture and international trade. While this model has led to increased food productivity, it failed to guarantee access to and quality of food, the other two important pillars of the food security framework. More important, the article argues that the continued adoption of food security and industrial agriculture is not neutral but reflects the shifting position of the Vietnamese government away from the peasantry for the benefits of capital accumulation by other classes.
A Review of Horwitz, Horwitz and Cope’s Theory of Foreign Language Anxiety and the Challenges to the Theory
TRAN Thi Thu Trang
English Language Teaching , 2012, DOI: 10.5539/elt.v5n1p69
Abstract: Language anxiety has become a great concern in second and foreign language learning research over the last three decades, and is a topic that triggers significant differences of opinions. As the first theory that emphasises the specific nature of foreign language anxiety, Horwitz, Horwitz, and Cope’s theory of foreign language anxiety has been used in quite a number of studies in the field. This paper reviews the theory and discusses the criticisms that other researchers have put forward it with an aim to provide further understanding of the theory for those who are interested in involving foreign language anxiety in their research.
Estimation of Waste Generation and Recycling Potential from Traditional Market: A Case Study in Hue City, Vietnam  [PDF]
Yasuhiro Matsui, Do Thi Thu Trang, Nguyen Phuc Thanh
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.64031
Abstract: This study was conducted to provide a detailed description of waste generation and characteristics from a traditional market in Hue city, located in central Vietnam. The authors conducted a waste generation survey and a waste composition survey for 309 stalls/vendors in five markets by 17 business categories for 10 consecutive days. The waste generation rates by stall/vendor and by floor area were assessed in three waste categories: general waste, recyclable, and food residues. The general waste that would be sent to a landfill site was classified into 10 physical categories and 77 sub-categories. For general waste, food waste accounted for the largest part, followed by plastic and grass. By multiplying the waste generation rate by stall/vendor by the total number of stall/vendors in 23 markets, the authors estimated the total amounts of general waste, recyclable, food residue and total waste by business category. The total waste generated from market was 17.0 tons/day, of which 4.6 tons (27.1%) were collected by pig farmers for feeding livestock and 0.6 tons (3.6%) were sold to the recycling market. The composting potential accounted for 55.2% of total waste generation from the traditional market in Hue. The recycling potential accounted for 5.1%. The total disposal amount sent to the landfill site would be reduced from 69.2% to 8.8% of the total. The 95% confidence interval (CI) of total waste amount from 23 markets was also estimated using Monte Carlo simulation based on the mean and standard error of the waste generation rate. The range of 95% CI was 14.9 - 18.9 tons/day.
Overweight, obesity and associated factors among secondary school students in a northern city of Vietnam in 2011  [PDF]
Huong Thi Le, Nga Thi Thu Vu, Doan Thi Thu Huyen, Nguyen Van Toan
Health (Health) , 2013, DOI: 10.4236/health.2013.51004
Abstract: Overweight and obesity is an emerging public health problem among school-aged children in Bac Giang city in the Northen part of Vietnam recently. This study aims to identify overweight-obesity prevalence of secondary school children in this city and it’s associated factors. The study was a nested case control in a cross-sectional study design in 1528 secondary students selected from 4 secondary schools in 2 inner communes and 2 suburban communes of Bac Giang city, Vietnam. Result: Overweight prevalence among secondary school students in Bac Giang was 6.7%, the prevalence of obesity was 2.0%. Overweight and obesity is more prevalence in male students, inner communes and students from family have higher income and higher food expense. Overweight and obesity was associated with higher energy intake, more fat consumption, having supplement meals and bedtimemeal, increased physical activities and increased sleep duration. Conclusion: Education campaign targeting reducing overweight and obesity should target both parents about dietary adequacy and balance and children about more physical activities.
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