Dalat University Journal of Science / Tạp chí khoa học Đại học Đà Lạt
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ISOLATION AND IDENTIFICATION OF CELLULOSE DEGRADING BACTERIA FROM SUGARCANE (SACCHARUM OFFICINARUM L.) BAGASSE IN CAN THO
Get PDFBagasse, which is primarily composed of cellulose, is an abundant by-product of the sugarcane processing industry. Bagasse can cause environmental pollution if not properly treated. This study aims to isolate cellulose-degrading bacteria from sugarcane bagasse and investigate their ability to decompose bagasse. Thirty bacterial strains were isolated on a carboxymethyl cellulose (CMC) medium from 14 sugarcane bagasse samples. The evaluation of the ability to degrade CMC substrates revealed that CMC degradation rings of isolated strains ranged from 1.333 to 7.600 mm. Five bacterial strains, 7B1, 8A2, 10A1, 11A1, and 11B1, exhibited large degradation rings. These five bacterial strains were further tested for their ability to degrade pulp substrates on agar medium, and three of them, 11A1, 7B1, and 11B1, exhibited the largest degradation rings of 7.467 mm, 7.067 mm, and 7.067 mm, respectively. The ability of bacterial strains 11A1, 7B1, and 11B1 to decompose bagasse was also tested, and after 7 days, the percentage of bagasse weight loss reached 27.00%, with bacterial strain 7B1 demonstrating a particularly strong ability to decompose bagasse at 28.87%. The 16S rDNA sequencing results revealed that strain 7B1 is 98.00% similar to Pseudomonas monteilii and Pseudomonas plecoglossicida. The high cellulose degradation ability of bacteria has potential applications in further practical study
UTILIZING CHERNOFF FACES IN MODELING RESPONSES IN THE EVALUATION OF TRIMESTER SCHEME IMPLEMENTATION
Get PDFThis study uses Chernoff faces to model the responses of students, faculty, and administration staff of a teacher education institution in Manila, Philippines, to the implementation of an Outcomes-Based Teacher Education Curriculum (OBTEC) trimester scheme. Chernoff faces provide a valuable representation to model responses because people are used to studying and reacting to faces. This study used a quantitative research method by analyzing cross-sectional data from the study of the OBTEC trimester scheme. A total of 322 participants were selected through convenience sampling and given a 15-item survey in which possible responses ranged from 1 (strongly disagree) to 6 (strongly agree). The administrators were found to give a generally favorable rating (overall mean = 4.56 agree; overall SD = 0.45) to the OBTEC trimester scheme. The statements most highly rated by the administrators pertain to the success of OBTEC in integrating pedagogical content knowledge training with outcomes-based education, preparation of the students for the teaching profession, and consistency with the K to 12 curriculum. These responses are characterized by the structure of the face, the width of the mouth, and the height of the face, respectively. The most negative aspects of the OBTEC trimester scheme, according to the students, are characterized by hair height, nose width, and a hair style of thin hair that points downward. Chernoff faces were found to be a simple, yet powerful tool to model responses in the evaluation of the OBTEC trimester scheme
ASSESSING THE CAPACITY OF THE COTU ETHNIC COMMUNITY IN DEVELOPING EDUCATIONAL TOURISM IN HÒA BẮC COMMUNE, HÒA VANG DISTRICT, ĐÀ NẴNG
No full textWith convenient transportation, diverse natural tourism resources, and a prominent cultural identity and agricultural ecosystem, Hòa Bắc can develop various types of tourism, such as cultural tourism, ecotourism, resort tourism, community-based educational tourism, and community tourism. However, tourism activities in this area need to be accompanied by research and specific policies to avoid negative environmental impacts. Additionally, relocating the Cotu ethnic community from their original living areas to the villages of Tà Lang and Giàn Bí in Hòa Bắc Commune raises concerns, as livelihood maintenance activities also affect the water and forest resources at the headwaters. Identifying community assets is a way to determine community resilience, leverage community values for livelihood development, and improve community life. This study identifies six types of community capital assets: human, natural, physical, financial, social, and cultural. The community capital assets are evaluated for strengths, weaknesses, opportunities, and threats (SWOT). Strategies to enhance community capacity and socioeconomic development are proposed
THE IMPACT OF INFORMATION AND COMMUNICATION TECHNOLOGY ON GREEN INVESTMENT: IMPLICATIONS FOR THE ASIA-EUROPE COMPETITIVE LANDSCAPE
No full textGiven the reality of the increasing global-scale environmental problems and progress in the information revolution, this paper examines the use of information and communication technology (ICT) in the field of green investments with a focus on the differences between Asia and Europe. We investigate the relationship between ICT and green investment by analyzing the longitudinal data of 88 countries for the years 1995 to 2023. The findings are robust after addressing endogeneity by the generalized method of moments and quantile regression models. The results demonstrate the relationship between ICT and green investment issues and its critical positive implications. In addition, financial development and government effectiveness are found to be crucial in moderating the impact of ICT on sustainable investment. Although financial development increases the effectiveness of ICT through increased access to green finance and reduced investment risk, excessive government regulation sometimes dilutes ICT-driven green initiatives through bureaucratic inefficiency. Geographical differences in green financial tools are also identified in the study, with Europe having robust institutional environments and structured green finance and Asia leveraging ICT innovations for sustainability, underlining the need for regulatory balance
BIBLIOMETRIC ANALYSIS OF RESEARCH ON ENTREPRENEURIAL INTENTION AMONG YOUTHS
No full textThis study provides a comprehensive bibliometric analysis of research on entrepreneurial intention (EI) among youths from 2000 to 2024, addressing the lack of systematic understanding of this field’s evolution and implications for youth entrepreneurship. A total of 1,768 Scopus-indexed articles were analyzed using VOSviewer and R software to conduct co-authorship mapping, co-occurrence keyword analysis, and thematic clustering, complemented by qualitative content analysis. The results reveal a sharp rise in publications since 2014, peaking in 2024, reflecting increasing scholarly and policy attention to youth entrepreneurship as a solution to unemployment. Six thematic clusters were identified: entrepreneurial mindset and motivation, entrepreneurship education and sustainability, applications of the theory of planned behavior, cultural influences and innovation, gender and entrepreneurial orientation, and social entrepreneurship. The intellectual structure shows wide international participation, with Malaysia, China, Spain, Indonesia, and India leading in output, though collaboration between developed and developing regions is limited. The theory of planned behavior remains the dominant framework, and entrepreneurship education is the most frequently studied determinant of youth EI. The findings offer evidence-based recommendations for policymakers, educators, and support organizations, including the development of mindset-focused training, the integration of sustainability into curricula, gender-responsive interventions, and stronger international research collaboration. As the first large-scale bibliometric study dedicated to individuals aged 18 to 24, this research delivers a nuanced understanding of thematic evolution, methodological orientations, and collaboration patterns in youth EI, while identifying emerging areas such as sustainability and resilience in the post-COVID context
WHEN TECHNOLOGY THREATENS JOBS: THE DUAL ROLE OF STARA AWARENESS
No full textTraditionally considered a stable employment and low-mobility industry, the banking sector is now experiencing workforce volatility due to the widespread adoption of smart technology, artificial intelligence, robotics, and algorithms (STARA). STARA not only replaces repetitive jobs; it fundamentally reshapes the nature of the remaining tasks, causing psychological stress, such as job insecurity. However, little is known about how this psychological stress affects employees, especially in emerging markets such as Vietnam. To fill this gap, this study investigates the relationship between STARA awareness and job insecurity via the mediating effect of perceived employability. A quantitative method was employed, using a sample size of 380 banking employees from commercial banks in Vietnam. The data were analyzed using SmartPLS software, and structural equation modeling (SEM) with the partial least squares (PLS) technique was employed to test the hypotheses. The findings showed that STARA awareness significantly increases both qualitative and quantitative job insecurity. Perceived employability moderates the relationship between STARA awareness and these two types of job insecurity, indicating that employees with higher perceived employability are better able to deal with the negative impacts of job insecurity caused by STARA awareness. This study extends the understanding of technology acceptance model theory by introducing STARA awareness as a novel antecedent of job insecurity and highlighting perceived employability as a psychological buffer in shaping how banking employees respond to advanced technologies. As a result, this study makes a theoretical contribution to the literature on employees’ stress response and their adaptation in tech-driven work environments. This research also emphasizes the urgent need to develop an effective internal communication channel, suitable training programs, and an open culture to support organizational alignment during digital transformation
TỶ LỆ LÃI SUẤT TRONG HỢP ĐỒNG VAY TIỀN THEO QUY ĐỊNH CỦA PHÁP LUẬT DÂN SỰ VIỆT NAM QUA CÁC THỜI KỲ TRONG MỐI LIÊN HỆ VỚI PHÁP LUẬT TÍN DỤNG
No full textInterest rates are a financial tool to ensure the rights of lenders in loan contracts. Accordingly, the borrower is obliged to pay interest if so agreed or provided by law. Through the amendments of the Civil Code, interest rates are an item that has had many changes compared to other provisions in loan agreements. However, the interest rates prescribed in the current Civil Code still cause different interpretations, especially in relation to credit laws. This leads to inconsistent application of the law, especially when dealing with credit contract disputes. Therefore, based on the study of interest rate regulations on loan contracts under the laws of Vietnam over time, we analyze some problems about interest rates and credit law under the current Civil Code and make some specific recommendations to solve the problems.Lãi suất là một công cụ tài chính nhằm đảm bảo quyền lợi của bên cho vay trong các hợp đồng vay tiền; theo đó, bên vay có nghĩa vụ trả lãi nếu có thỏa thuận hoặc pháp luật có quy định. Qua các lần sửa đổi Bộ luật Dân sự, lãi suất là một nội dung có nhiều sự thay đổi so với các quy định khác trong chế định hợp đồng vay tài sản. Tuy nhiên, tỷ lệ lãi suất được quy định trong Bộ luật Dân sự hiện hành vẫn còn gây ra nhiều cách hiểu khác nhau, đặc biệt là trong mối liên hệ với pháp luật tín dụng. Điều này dẫn đến việc áp dụng pháp luật không thống nhất, đặc biệt là khi giải quyết các tranh chấp về hợp đồng tín dụng. Vì vậy, trong phạm vi bài viết, trên cơ sở nghiên cứu các quy định về tỷ lệ lãi suấttrong hợp đồng vay tiền theo quy định của pháp luật Việt Nam qua các thời kỳ, chúng tôi phân tích một số vướng mắc về tỷ lệ lãi suất theo quy định của Bộ luật Dân sự Việt Nam hiện hành trong mối liên hệ với pháp luật tín dụng và đưa ra một số kiến nghị cụ thể giải quyết vấn đề này.
TOWARD THE DEVELOPMENT OF A PARENT-TEACHER PARTNERSHIP MODEL FOR FLEXIBLE LEARNING
No full textParent-teacher partnership is essential in supporting young children’s learning. This study uses developmental research to develop a parent-teacher partnership model for flexible learning. Random sampling was used to select 79 parents of students in kindergarten to Grade 3. Thematic analysis was used to analyze the qualitative data. The findings revealed that parents had different experiences with partnerships in flexible learning. Socio-emotional, technology, and academic support were needed to enable parents to continue the partnerships. The proposed parent-teacher partnership framework identifies communication, collaboration, and consistency as key components. Communication is the exchange of information between teachers and parents in which mutual trust and respect are present. Collaboration and cooperation work together to achieve learners’ goals by supporting each other as partners in difficult situations. Consistency is the continuity of a partnership that prioritizes habit formation. Further investigation is recommended for future research
POPULATION GENETIC DIVERSITY AND VARIATION OF CAMELLIA SINENSIS VAR. MADOENSIS T. V. NGUYEN, V. D. LUONG & N. T. LE REVEALED BY ISSR, CDDP, AND SCOT TECHNIQUES
No full textThe genetic diversity and variation of two naturally distributed Camellia sinensis var. madoensis populations in Phu Yen, Vietnam, were analyzed using start codon targeted polymorphism (SCoT), inter simple sequence repeat (ISSR), and conserved DNA derived polymorphism (CDDP) techniques, and combined data. Based on the combined data, the entire variety possessed the following genetic diversity parameters: expected heterozygosity (He) = 0.2691, Shannon index (I) = 0.4085, and proportion of polymorphic bands (PPB) = 92.37%. The Cu Mong population demonstrated higher genetic diversity (He = 0.2223, I = 0.3387, PPB = 75.1%) than the Cao Phong population (He = 0.1531, I = 0.2358, PPB = 54.62%). Low gene flow (Nm = 1.2088) led to a significant genetic differentiation index (GST = 0.2926) and genetic distance (D = 0.2113) between the two survey populations. The distribution of genetic variation within the populations (WP = 54%) was slightly higher than that among populations (AP = 46%). Each DNA fingerprinting technique had distinct strengths and weaknesses in assessing genetic diversity and variation. However, the SCoT technique emerged as the most suitable for this study based on its overall utility
A COMPARATIVE STUDY OF THE CHINESE THOUGHT OF TIANXIA WEI GONG AND HỒ CHÍ MINH’S PRINCIPLE NƯỚC LẤY DÂN LÀM GỐC: PRACTICAL IMPLICATIONS FOR CONTEMPORARY STATE GOVERNANCE IN VIETNAM
No full textThe concept of “Tianxia wei gong” (天下為公) [All under heaven belongs to the public] originates from ancient Chinese political culture. It underwent significant development throughout the flourishing of feudal dynasties and has continued to be interpreted and applied in modern Chinese political thought. This is particularly evident in Sun Yat-sen’s Three principles of the people, as well as the contemporary Chinese Communist Party’s theory of “the people as masters of the country.” This demonstrates that “Tianxia wei gong” is not merely a traditional moral ideal but also a foundational element in the modernization of political theory by Chinese thinkers, serving the broader goals of national reform and development. Meanwhile, in Vietnam, Hồ Chí Minh’s principle that “Nước lấy dân làm gốc” [The nation is rooted in its people] has been central throughout the country’s development process, becoming a core value in state governance philosophy across historical periods. Although significantly influenced by Confucianism and Chinese political thought, this ideology in Vietnam has been adopted, transformed, and developed with distinctive characteristics suited to Vietnam’s historical, cultural, and social conditions. This study explores the differences between the concept of “Tianxia wei gong” in Chinese political philosophy and the principle of “Nước lấy dân làm gốc” in Vietnamese state governance. By analyzing the origins, meanings, and manifestations of these two concepts, the article elucidates the distinctions between “Tianxia wei gong” and Hồ Chí Minh’s principle “Nước lấy dân làm gốc” in terms of ideological foundations and practical implications, thereby providing valuable insights for developing Vietnamese state governance philosophy for the new era–a philosophy that both inherits traditional wisdom and aligns with development trends in today’s era of globalization and the fourth industrial revolution