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Articles 8581 - 8610 of 15281
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Synergistic Activities Of Antibiotic Combinations Against Carbapenem-Resistant Klebsiella Pneumoniae And Mechanisms Of Carbapenem Resistance In Klebsiella Pneumoniae Clinical Isolates., Netchanok Muhummudaree
Synergistic Activities Of Antibiotic Combinations Against Carbapenem-Resistant Klebsiella Pneumoniae And Mechanisms Of Carbapenem Resistance In Klebsiella Pneumoniae Clinical Isolates., Netchanok Muhummudaree
Chulalongkorn University Theses and Dissertations (Chula ETD)
Carbapenem-resistant Klebsiella pneumoniae (CRKP) has been increasing reported worldwide. The aims of this study were to investigate the mechanisms of carbapenem resistance in K. pneumoniae Thai isolates and study the synergistic activities of antibiotic combinations against CRKP isolates. Two-hundred and forty CRKP clinical isolates were obtained from patients at King Chulalongkorn Memorial Hospital between September 2016 and April 2020. The antibiotic susceptibility testing was determined by agar dilution to imipenem, meropenem, amikacin, fosfomycin, ciprofloxacin and by broth microdilution to colistin. The prevalence rates of resistance to imipenem, meropenem, ciprofloxacin, fosfomycin, amikacin, and colistin were 90.42%, 91.67%, 95.84%, 41.25%, 20%, and …
Factors Influencing Adoption And Usage Probability Of Automated Parcel Lockers, Orawee Thongkam
Factors Influencing Adoption And Usage Probability Of Automated Parcel Lockers, Orawee Thongkam
Chulalongkorn University Theses and Dissertations (Chula ETD)
The study proposes a model to predict probability to use Automated Parcel Locker (APL) in Bangkok by adopting Multiple Linear Regression. In addition, to help business to market to the right target and increase the intention to use, the study investigates factors influencing Intention to use APL by employing Structural Equation Model (SEM). The framework is developed based on Technology Acceptance Model (TAM) and other external factors. The questionaries were conducted for both methods with 718 observation and 500 responses, randomly selected. The results show that variables best predict probability to use APL is price set with discount, followed by …
Drivers For Reverse Logistics Packaging In Circular Economy For Thailand Beverage Industry From The Manufacturer Perspective, Patiparn Sajjasophon
Drivers For Reverse Logistics Packaging In Circular Economy For Thailand Beverage Industry From The Manufacturer Perspective, Patiparn Sajjasophon
Chulalongkorn University Theses and Dissertations (Chula ETD)
In Thailand, Municipal Solid Waste (MSW) problems exist, and 15% are due to post-consumption beverage packaging that is left behind after the point of consumption. This study aimed to analyze driving forces in reverse logistics of post consumption packaging for Thailand beverage industry and examine impact of sustainability. 39 variables related to drivers, key success factors including sustainability also modeled. Questionnaire has been designed based on 11-point rating scale and Item-Objective Congruence performed by experts from the academic and business. Sampling conducted through 210 respondents from alcoholic and non-alcoholic manufacturers. Collected data analyzed by using structural equation modeling for hypotheses …
Application Of Phage Display Technology For The Production Of Antibodies Againststreptococcus Suis Serotype 2, Pattarawadee Sulong
Application Of Phage Display Technology For The Production Of Antibodies Againststreptococcus Suis Serotype 2, Pattarawadee Sulong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Streptococcus suis (S. suis) serotype 2 infection is problematic in the swine industry and responsible for most cases of human infection worldwide. Since current multiplex PCR cannot differentiate between serotypes 2 and 1/2, then serotype-specific antibodies (Abs) are required for serotype identification to confirm S. suis serotype 2 infection. This study aimed to generate Abs specific to S. suis serotype 2 by phage display from a human heavy chain variable domain (VH) antibody library. For biopanning, whole cells of S. suis serotype 2 were used as the target antigen. With increasing selection stringency, we could select the VH Abs that …
Synthesis Of Nanoscale Zerovalent Iron (Nzvi) Derived From Lignin Containing Wastewater For Arsenic Removal, Phoomipat Jungcharoen
Synthesis Of Nanoscale Zerovalent Iron (Nzvi) Derived From Lignin Containing Wastewater For Arsenic Removal, Phoomipat Jungcharoen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nanoscale zerovalent iron (nZVI) plays a significant role in environmental remediation including the removal of arsenic from groundwater and drinking water. This study synthesized modified nZVI particles in order to remove arsenic in drinking water. Reductive precipitation under various conditions was used to produce non-modified nZVI (B-nZVI) and lignin-modified nZVI using either 1 g/L lignin solution (L-nZVI) or pulp and paper wastewater (P-nZVI) as the substrate. Ferrous to borohydride molar ratio of 1:1 was found to be the most appropriate ratio for L-nZVI and P-nZVI production since lignin was incorporated into the nZVI structure the most. According to TEM analysis, …
Fishermen's Participation In Marine Litter Collection Schemes In Thailand, Phornphavit Thongphaijit
Fishermen's Participation In Marine Litter Collection Schemes In Thailand, Phornphavit Thongphaijit
Chulalongkorn University Theses and Dissertations (Chula ETD)
Marine litter is a global environmental problem that poses various threats to the environment, the economy and society. Its impacts, for example, are the cost of beach cleaning, tourism, the beautiful landscape and etc. Marine litter, which later breaks into microplastics, affects marine lives contributing to the loss of economy to the people who depend on them. Several measures are used to tackle marine litter, including prevention and reduction of waste generation, prevention and reduction of litter reaching the marine environment, and marine litter removal. The latter is essential to clean already-at-sea litter or marine debris. Thailand, among the top …
Mechanisms Of Anthocyanin-Enrich Riceberry Rice Extract (Oryza Sativa L.) On The Regulation Of Nutrient Metabolisms And Adipogenesis, Phutthida Kongthitilerd
Mechanisms Of Anthocyanin-Enrich Riceberry Rice Extract (Oryza Sativa L.) On The Regulation Of Nutrient Metabolisms And Adipogenesis, Phutthida Kongthitilerd
Chulalongkorn University Theses and Dissertations (Chula ETD)
Riceberry rice, a new pigmented rice variety from Thailand, contained high anthocyanin content and expressed various biological activities. This study aimed to investigate the anti-obesity effects of Riceberry rice extract (RBE) in 3T3-L1 preadipocytes and to identify the mechanism of RBE and its phytochemicals on insulin secretion from pancreatic INS-1 cells. In 3T3-L1 cells, RBE inhibited preadipocyte proliferation by inducing cell cycle arrest without causing cytotoxicity. During adipogenesis, RBE downregulated transcription factor and adipogenic gene expression leading to the decrease in adipocyte number and triglyceride accumulation. Moreover, RBE reduced glucose uptake by downregulating glucose transporter 4 gene expression and enhanced …
Influences Of Korean Presenters Toward Thai Consumers, Pilaiwan Makchaisataporn
Influences Of Korean Presenters Toward Thai Consumers, Pilaiwan Makchaisataporn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objectives of this research are to investigate the relationship between Korean Wave in Thailand and Thai consumers resulting in Thai products hiring South Korean as the brand presenter to promote its products in Thailand. This study is focusing on Thai products with South Korean presenters from 2007 to the present as well as studying the factors of the consumers' decision to purchase in Thai products with South Korean presenters, such as general consumer information, attitude towards products with South Korean presenters, external influences affecting product consumption, and product consumption behavior. However, this study provided a questionnaire to consumers who …
Perspectives And Challenges Of Green Hotel In Thailand, Pornwajee Sangmanee
Perspectives And Challenges Of Green Hotel In Thailand, Pornwajee Sangmanee
Chulalongkorn University Theses and Dissertations (Chula ETD)
The hotel business is intense resource consumption such as water, energy, and non-durable products to delight customers, leading to environmental problems. With this regard, the transformation of the green hotel and environmental saving programs can dwindle the hotel property's adverse impacts. The purposes of this paper are 1) to study the perception of hotel practitioners and stakeholders toward the critical challenges of green hotel transformation and 2) to propose the recommendations for green hotel operations and certification scheme in Thailand. The study employed mixed methods to collect the data. The in-depth interviews were along with field observation; the interviews data …
Digital Transformation Factors Influencing The Sustainability Of Logistics Service Providers In Thailand, Putthiwat Singhdong
Digital Transformation Factors Influencing The Sustainability Of Logistics Service Providers In Thailand, Putthiwat Singhdong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research explores and develops digital transformation factors influencing the logistics service-provider sector in Thailand while also examining the impact of sustainability factors associated with digital transformation. Divided into two parts, Part one of the theoretical study framework covers 21 factors relating to logistics, including drivers, objectives, implications, and success factors. The second part concerns 23 factors associated with logistics sustainability, including economic, environmental, and social aspects. This quantitative empirical research was conducted using an online questionnaire instrument, and a structural equation modeling (SEM) technique was used to test the proposed model. The findings from 545 respondents who related with …
The Roles Of Ros And P21 In Apoptosis-Inducing Effect Of Cepharanthine In Human Colorectal Cancer Cells, Rattana Saetung
The Roles Of Ros And P21 In Apoptosis-Inducing Effect Of Cepharanthine In Human Colorectal Cancer Cells, Rattana Saetung
Chulalongkorn University Theses and Dissertations (Chula ETD)
Cepharanthine (CEP), a natural compound isolated from Stephania cepharantha Hayata, has been shown to possess anti-cancer activity against several cancers including colorectal cancer (CRC) cells. Previously, it was found that cytotoxicity of CEP was associated with ROS generation and p21Waf1/Cip1 expression. However, information regarding to the molecular mechanisms underlying the apoptosis-inducing effects of CEP in CRC cells is still limited. Therefore, the present study aimed to evaluate the roles of ROS and p21Waf1/Cip1 in the apoptosis-inducing effect of CEP in two human colorectal cancer cells lines, p53 wild-type HCT116 cells and p53 mutant HT-29 cells. The results demonstrated that CEP …
Factor For Thai Transgender Women Having Korean Stlyed Aesthetic Surgery, Sahatta Meksuteepitak
Factor For Thai Transgender Women Having Korean Stlyed Aesthetic Surgery, Sahatta Meksuteepitak
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research investigated some important factors affecting decision of Thai transgender women having Korean-styled aesthetic surgery. There were two main objectives for this research, which were 1) to study Thai transgender women's opinion and attitude toward Korean-styled aesthetic surgery, and 2) to identify the factors that affect decision on having Korean-styled aesthetic surgery for Thai transgender women. This research adopted a quantitative approach using online questionnaire as the research instrument. 375 sets of questionnaire were collected in this research. All questionnaires were filled by Thai transgender women who have had through Korean-styled aesthetic surgery. The data were summarized using descriptive …
The Promotion Of French Language And Culture By Alliance Française In Bangkok, Thailand, Shu-Chin Huang
The Promotion Of French Language And Culture By Alliance Française In Bangkok, Thailand, Shu-Chin Huang
Chulalongkorn University Theses and Dissertations (Chula ETD)
The French language plays an important role in international society. It is widely used in commerce, diplomatic and academic fields, and is generally recognised as a representative of high culture. However, the language is facing a fast decline in Southeast Asia due to globalisation, which has expanded the role of English very rapidly all over the world. To solve the problem of the decrease in the role of French in the world, Alliance Française was established to disseminate the knowledge of French language and culture around the world. This study aims to analyse the strategies used by Alliance Française to …
The Strategy Of Using Foreign Idols To Make K-Pop Entertainment Companies Success In Global Market: The Case Study Of Thai K-Pop Idols, Sida Smarnmit
The Strategy Of Using Foreign Idols To Make K-Pop Entertainment Companies Success In Global Market: The Case Study Of Thai K-Pop Idols, Sida Smarnmit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study explores the strategy of using foreign idols to makes K-POP entertainment companies successful in the global market. This research is qualitative research and analysis of people's perspectives from the interview of three groups of people and related research documents. In addition, this research used the generalized double diamond model by Chang Moon to analyze K-POP entertainment company's strategies. The results of study on the strategy of using foreign idols to make K-POP entertainment companies success in global market were (1) K-pop idol production system, appearance, and characteristic. (2) Thai K-pop idol production strategy and Social Network Strategy (3) …
City-Wide Greenhouse Gas Mitigation Options To Support Global Climate Goals: Case Studies Of Bangkok, Chiang Mai, And Rayong, Thailand, Sittisak Sugsaisakon
City-Wide Greenhouse Gas Mitigation Options To Support Global Climate Goals: Case Studies Of Bangkok, Chiang Mai, And Rayong, Thailand, Sittisak Sugsaisakon
Chulalongkorn University Theses and Dissertations (Chula ETD)
The action of city on climate mitigation becomes a crucial role. The aims of this study were to quantify greenhouse gases (GHGs) emission, identify feasibility of mitigation options in selected provinces, and to evaluate the performance of local capacity to support Thailand's Nationally Determined Contributed (NDC) and 1.5oC limit pathway. Three provinces, including Bangkok, Chiang Mai and Rayong of Thailand were selected as case studies. The results revealed that stationary energy was the greatest contribution to the city's GHGs emissions in all case studies. Transportation was the second largest emitter in Bangkok and Chiang Mai, whereas IPPU was the second …
Leaching Potential Assessment Of Atrazine And Nitrate In Sugarcane Field, Suphan Buri Province, Sorranat Ratchawang
Leaching Potential Assessment Of Atrazine And Nitrate In Sugarcane Field, Suphan Buri Province, Sorranat Ratchawang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Atrazine is widely used as a herbicide to control annual broadleaf in agricultural area such as rice and sugarcane. It is considered as one of endocrine disrupting chemicals. Atrazine also affects liver, the central nervous system, immune system and cardiovascular function. The study area is sugarcane field in U-thong and Song Phi Nong district, Suphan Buri province. In this area, soil and groundwater samples were collected at eight different points distributed over the sugarcane area with different soil types. Batch adsorption experiment was carried out to evaluate the proper adsorption isotherm of each soil. Additionally, groundwater samples were analyzed for …
Development Of Tod Readiness Index And Its Application To Transit Station In Bangkok, Srisamrit Supaprasert
Development Of Tod Readiness Index And Its Application To Transit Station In Bangkok, Srisamrit Supaprasert
Chulalongkorn University Theses and Dissertations (Chula ETD)
Studies on the Transit-Oriented Development (TOD) for Bangkok are found sparingly. The TOD concept is a supportive development for the rapidly changing city in order to reduce urban transport problems while encouraging people to shift transport modes to use public transportation instead of private cars. This study discusses the context of TOD in the density, the design, and the diversity of land use around transit stations among successful stations in many countries. There were 18 station areas in Bangkok which, by using the TOD Readiness score, the assessment of the stations implies that the higher scoring transit stations are more …
Effect Of 2-(4"-Hydroxybenzyl)-5-2"-Dihydroxy-3- Methoxystilbene On Apoptosis And Autophagic Cell Death Of Lung Cancer Cells, Sucharat Tungsukruthai
Effect Of 2-(4"-Hydroxybenzyl)-5-2"-Dihydroxy-3- Methoxystilbene On Apoptosis And Autophagic Cell Death Of Lung Cancer Cells, Sucharat Tungsukruthai
Chulalongkorn University Theses and Dissertations (Chula ETD)
The shifting of autophagy, a catabolic process for cell survival, toward death could be a potential mode of anti-cancer drug action. In addition, autophagic cell death (ACD) is an alternative death mechanism in resistant malignant cancer cells. This study, we demonstrated how PE5, a stilbene compound, exhibits potent ACD-promoting activity and apoptosis in lung cancer cells that may offer an opportunity for novel cancer treatment. It was found that PE5 exerted a higher toxic effect toward cancer cells compared with its effect on normal cells. Interestingly, the cell death caused by PE5 was found to be concomitant with dramatic autophagy …
Detection Of Arsenite-Oxidizing Bacteria In Groundwater From A Gold Mine Under Different Geochemical Environments, Supeerapat Kraidech
Detection Of Arsenite-Oxidizing Bacteria In Groundwater From A Gold Mine Under Different Geochemical Environments, Supeerapat Kraidech
Chulalongkorn University Theses and Dissertations (Chula ETD)
Millions of people around the world potentially expose to arsenic (As) contaminated groundwater. Besides, the dominant form of As in groundwater is arsenite (As+3) and is more toxic than arsenate (As+5). This study integrated the microbial investigation, geochemical modeling, and multivariate statistical analysis to investigate the arsenite-oxidizing bacteria community from As-contaminated groundwater and its environmental influencing factors in order to understand and further develop the in-situ arsenic bioremediation technology. Microbial investigation was focusing on the detection and identification of native arsenite-oxidizing bacterial community using PCR-DGGE, cloning and sequencing of arsenite oxidase (aoxB) gene amplicons. Nine groundwater samples were collected from …
Characterization Of Carbon Storage Regulator A (Csra) Homolog As A Global Gene Regulator In Leptospira Spp., Theerapat Phoka
Characterization Of Carbon Storage Regulator A (Csra) Homolog As A Global Gene Regulator In Leptospira Spp., Theerapat Phoka
Chulalongkorn University Theses and Dissertations (Chula ETD)
Leptospira spp. consist of non-pathogenic and pathogenic species. The bacteria can survive in diverse environments and therefore need mechanisms of rapid adaptation to environmental changes. However, molecular mechanisms of stress response in Leptospira are not fully understood. Carbon Storage Regulator A (CsrA) is a well-characterized, conserved, post-transcriptional global regulator that plays a critical role in response to environmental changes in many bacteria. CsrA has been reported to regulate several pathways such as glycogen metabolism, motility, biofilm formation, and virulence-associated genes. Based on available genomics data of Leptospira spp., we found putative csrA homolog, approximately 50% similarity with csrA of E. …
Comparative Evaluation Of Mineral Trioxide Aggregate And Acemannam For Partial Pulpotomy In Permanent Teeth With Incomplete Root Formation, Thuy Tien Vu
Chulalongkorn University Theses and Dissertations (Chula ETD)
Mineral trioxide aggregate (MTA), the standard pulp capping material, has disadvantages, including long setting time and high cost. Along this line, acemannan, a polysaccharide extracted from aloe vera, would be a promising biomaterial for vital pulp therapy as it is shown to induce mineralized bridge formation in animal and clinical studies. In this study, the impact of MTA and acemannan sponges on partial pulpotomized permanent teeth has been evaluated. For the research design, fifty immature permanent teeth with caries or accident-induced pulp exposure were collected and assessed. After partial pulpotomy, the teeth were randomly allocated into the treatment group using …
The Differential Dendritic Cell Properties In Response To Candida Albicans And Non-Albican Candida Β-Glucan, Truc Thi Huong Dinh
The Differential Dendritic Cell Properties In Response To Candida Albicans And Non-Albican Candida Β-Glucan, Truc Thi Huong Dinh
Chulalongkorn University Theses and Dissertations (Chula ETD)
Increased mortality and antifungal drug resistance of non-albicans Candidiasis patients have become an alarming in health problems nowadays, whereas profound knowledge of their pathogenesis mechanisms is still limited. The immune responses of innate and adaptive immunity play a crucial role in protecting from Candida infections. Dendritic cells (DCs) are the most notable because of their roles in bridging an innate immunity and specific adaptive immunity to eliminate fungal invasion. It is little known about DC functions in non-albicans Candida (NACs) infections. Besides, there is less study on evaluating the DC properties upon the interaction between DCs and NACs-derived ß-glucans. Therefore, …
Servitization Model For Chemical Industry In Thailand, Tanyaporn Kanignant
Servitization Model For Chemical Industry In Thailand, Tanyaporn Kanignant
Chulalongkorn University Theses and Dissertations (Chula ETD)
Chemical industry traditionally produces and sells tangible goods in large volume and high price cometition. Recently, firms in chemical industry provide additional services to their customers. Several manufacturers change from tangible product suppliers to both product and service providers. This movement is called servitization (Vandermerwe & Rada, 1988). Chemical servitization levels can be classified into 4 categories which are product only, service added to the product, service differential the product and service is the product (Thoben, Eschenbacher, & Jagdev, 2001). The objectives of this paper are to construct servitization framework for chemical suppliers to shift to product service integration and …
The Effects Of Project-Based Drama Approach Via Blended Learning Environment On Thai Efl Undergraduated Student's Speaking Skills, Tunyaphoom Phu-Ngamthong
The Effects Of Project-Based Drama Approach Via Blended Learning Environment On Thai Efl Undergraduated Student's Speaking Skills, Tunyaphoom Phu-Ngamthong
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objectives of this study were 1) to examine the effectiveness of project-based drama approach via blended learning environment on English speaking skills, and 2) to investigate the students’ opinions towards project-based drama approach via blended learning environment on English speaking skills.The framework was derived from the combination of three models; Teaching English through Drama for Oral Skills Model, the Project-Based Learning framework, and the Blended Learning Model. The study was conducted face-to-face and online for 14 consecutive weeks in the second semester of Academic Year of 2020 at Ubon Ratchathani Rajabhat University. The participants were 51 third-year students who …
Sustainable Business Development Through Sufficiency Economy Practice : A Case Study Of Thai Listed Companies, Veerawin Korphaibool
Sustainable Business Development Through Sufficiency Economy Practice : A Case Study Of Thai Listed Companies, Veerawin Korphaibool
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of the research is to determine the sufficiency economy philosophy (SEP) performance through annual and sustainable development reports and simplify the outcomes by representing through a scoring system. Each of the SEP elements was aligned with each GRI sub-topic to generate a SEP scoring system. Then, the results from the scoring system were verified by testing the relationship between SEP performance and firm-specific risk of 34 Thai listed companies from 2013 to 2018 via panel data analysis. The global reporting initiative (GRI) standards were used as the fundamental scoring system as it's widely used and accepted in academic …
Parasite: A Reflection On Social And Economic Disparities In South Korea, Wilasinee Nichasuk
Parasite: A Reflection On Social And Economic Disparities In South Korea, Wilasinee Nichasuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of this research is to analyze a reflection of social problems in "Parasite" film. The study is a qualitative research that uses semiology theory to analyze the social problems in the film through elements such as visual sign, scene, dialogue etc. The results of these analyses show that "Parasite" film reflects the social problems in South Korea through a visual sign, scene, dialogue such as disparity social class problems. These problems that occur in South Korea are partly due to a result of the rapid change in South Korea society and adoption of the capitalist system to develop …
Supply Chain Collaboration For Sustainability In Thailand's Dairy Industry, Virayos Vajirabhoga
Supply Chain Collaboration For Sustainability In Thailand's Dairy Industry, Virayos Vajirabhoga
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study gathered potential 95 variables from a literature review. Through the process of expert review, these were refined into 49 critical variables. Moreover, pilot study, with participation from co-operatives and farmers, aims to develop conceptual frameworks in six areas: performance and commitment, internal and external collaboration, measurement and evaluation, joint operation, sharing and innovation, and negotiation. Furthermore, 26 factors were identified clearly by exploratory factory analysis. The main study was conducted via a paper-based questionnaire with 1,224 respondents nationwide. The proposed 11 hypotheses attempted to identify the structural relationships among the constructs in the model. The result confirmed the …
Neutrophil Extracellular Traps (Nets) Formation Of Fcgr2b Deficient Mice In Lupus Mouse Model With Ischemic Reperfusion Injury, Wilasinee Saisorn
Neutrophil Extracellular Traps (Nets) Formation Of Fcgr2b Deficient Mice In Lupus Mouse Model With Ischemic Reperfusion Injury, Wilasinee Saisorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Acute kidney injury (AKI) caused by renal ischemic reperfusion (I/R) is the most prevalent cause of morbidity and mortality in patients. Neutrophil extracellular traps (NETs) are important for the progression of lupus nephritis after renal I/R injury. Because neutrophils are the first immune cell that respond to tissue damage, neutrophils might be an important cell that determines renal I/R injury. Additionally, NET components, including cell-free DNA, histone, nucleosome, and cytoplasmic protein compartment release the auto-antigens that accelerate lupus disease activity. Therefore, this project aimed to compare NETs formation in several internal organs following renal I/R injury in Fcgr2b deficient (Fcgr2b-/-) …
Avoidance Of The English Passive Construction By L1 Chinese Learners, Yang Wang
Avoidance Of The English Passive Construction By L1 Chinese Learners, Yang Wang
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research investigated avoidance behaviour as one of the strategies L2 learners may resort to because of L1-L2 differences, or the non-existence of L2 structures for L1 learners (Schachter 1974; Dagut and Laufer 1985). Schachter (1974) proposed the Avoidance Behaviour Hypothesis, whereby L2 learners were likely to avoid using some L2 structures due to the aforementioned difficulties in L2 acquisition. Later researchers, i.e. Dagut and Laufer (1985), and Laufer and Eliasson (1993), claimed that L1-L2 differences tended to play a role, or at least would be the 'best predictor' (1993, p46) of avoidance. However, recent researchers, i.e. Thiamtawan and Pongpairoj …
Assessments Of Hydraulic Responses To Climate Variability Of Dominant Trees In Successional Forests In Khao Yai National Park For Environmental Management, Weerapong Unawong
Assessments Of Hydraulic Responses To Climate Variability Of Dominant Trees In Successional Forests In Khao Yai National Park For Environmental Management, Weerapong Unawong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In Southeast Asia, tropical forests have been increasingly threatened by human disturbances and climate change-induced water stress. However, uncertainty remains as to how these forests would respond to environmental changes under water deficit conditions. Here, we conducted a study of seasonal variation in leaf water status and hydraulic properties of dominant tree species across forest successional stages in Khao Yai National Park, Thailand. Specifically, we measured midday leaf water potential (Ψmd) during the wet and dry season, and assessed branch xylem vulnerability at which 50% is lost (P50). The associations between P50 and maximum xylem hydraulic conductivity (Ksmax) and maximum …