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Influence Of Tidal Current On Microplastic Dynamics In Chao Phraya River Estuarine Ecosystem, Jiradet Tang-Siri Jan 2022

Influence Of Tidal Current On Microplastic Dynamics In Chao Phraya River Estuarine Ecosystem, Jiradet Tang-Siri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microplastics (MPs) can be found almost everywhere in marine ecosystems. That is one of the issues of concern around the world, including in Thailand. Estuary ecosystems are also among the most disturbed. By the estuary ecosystem affected by both rivers and oceans, such as the mouth of the Chao Phraya River in Thailand. Due to the change in tide, it is necessary to study the effects of tidal currents on the depth of MPs. Water samples were collected at approximately 60 water levels in 24 hours. Samples and three water quality indicators were collected at Pak Nam Chao Phraya. The …

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Unpacking Gender Inequality For Inclusive Development: A Case Study Of Myanmar Female Migrant Workers In Samut Sakhon Province, Thailand, Hsan Thawdar Htun Jan 2022

Unpacking Gender Inequality For Inclusive Development: A Case Study Of Myanmar Female Migrant Workers In Samut Sakhon Province, Thailand, Hsan Thawdar Htun

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study aims to address the issue of gender inequality in Thailand's seafood industry, with a specific focus on Myanmar female migrant workers in Mahachai (Samut Sakhon province). Although women migrant workers play a significant role in Thailand's economy, they have been facing various challenges in low-wage industries. Gender inequality remains a prominent concern in these low-skilled labor-intensive workplaces like seafood industry. While there have been studies on migration that include both men and women or focus solely on women, gender has not received sufficient emphasis in understanding the experiences of female migrant workers, particularly in the seafood industry. This …

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Migrant Trainees And Social Inclusion : A Study Of Construction And Electronics Company In Japan, Kazuhiro Watanabe Jan 2022

Migrant Trainees And Social Inclusion : A Study Of Construction And Electronics Company In Japan, Kazuhiro Watanabe

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research analyzed the Technical Intern Training Program (TITP) by using the concept of social inclusion and discussed the factors that inhibit the social inclusion of trainees. Not much previous research on has been done on this because trainees are allowed to stay in Japan temporarily and they must go back to their home countries after the training is over. However, trainees contribute economic growth in Japan and play an important role for solving issues of the labor force. Realizing social inclusion of trainees is thus a significant issue for Japan. Factors that inhibit the social inclusion of trainees includes …

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Assessing The Contribution Of Thailand’S Poultry Agribusiness Towardsmitigating Climate Change, Tita Phairaksa Jan 2022

Assessing The Contribution Of Thailand’S Poultry Agribusiness Towardsmitigating Climate Change, Tita Phairaksa

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research provides an overview of the Thailand agreement on greenhouse gas emissions, specifically focusing on the meat industry, and examines the roles of the government, private companies, and civil society in Thailand. Research indicates that the meat industry has significant environmental impacts, including greenhouse gas emissions, deforestation, and biodiversity loss. Livestock for meat consumption has been a major contributor to environmental issues such as climate change, water pollution, and deforestation. Livestock alone contributes a substantial percentage to global climate change. This issue has become a critical transboundary concern affecting not only one specific country or region. In response to …

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Connected Size Ramsey Numbers Of Matching And Some Graphs, Jirawat Mungtumklang Jan 2022

Connected Size Ramsey Numbers Of Matching And Some Graphs, Jirawat Mungtumklang

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.

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Valuation Of American Commodity Options, Piyapoom Nonsoong Jan 2022

Valuation Of American Commodity Options, Piyapoom Nonsoong

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this dissertation, we present analytical option pricing formulas for European and American options in which the price dynamics of a risky asset follows a meanreverting process with time-dependent parameter. The process can be adapted to describe both nonseasonal and seasonal variation in price, especially, in commodity markets such as agricultural commodities. The formulas are derived based on the solutions of partial differential equations showing that the values of both European and American options can be decomposed into two parts: the payoff of the option at initial time and the time-integral over the lifetime of the option, which is driven …

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Classification Of Bacteria And Fungi In Peritoneal Dialysis Fluids Of Patients With Chronic Kidney Disease Based On Metagenomic Analysis, Suthida Visedthorn Jan 2022

Classification Of Bacteria And Fungi In Peritoneal Dialysis Fluids Of Patients With Chronic Kidney Disease Based On Metagenomic Analysis, Suthida Visedthorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Chronic kidney disease (CKD) is a long-term condition where sustained damage of the renal parenchyma leads to the chronic deterioration of renal function that may gradually progress to end-stage kidney disease (ESKD). Peritoneal dialysis (PD) is a type of ESKD treatment that is beneficial to improve a patient's quality of life. However, PD-associated peritonitis is a major complication that contributes cause of death, and the detection of the pathogen provided a high culture-negative rate. This study aims to apply metagenomic approaches for identifying the bacteria and fungi in peritoneal dialysis effluent (PDE) of CKD patients based on the full-length 16S …

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Effect Of Candida Glabrata Β-Glucans On Immunosuppressive Properties Of Dendritic Cells, Phawida Tummamunkong Jan 2022

Effect Of Candida Glabrata Β-Glucans On Immunosuppressive Properties Of Dendritic Cells, Phawida Tummamunkong

Chulalongkorn University Theses and Dissertations (Chula ETD)

β-glucan is a polysaccharide and consists of the backbone of β-(1, 3)-glucan and/or β-(1, 6)-glucan structures. β-glucans are extracted from the cell wall of Candida sp, including Candida glabrata. Interestingly, the biological activity of Candida β-glucan has been represented as a stimulator in the mechanism of immune responses. Dendritic cells are powerful antigen-presenting cells that play a significant role in both innate and adaptive immunity. In the present study, we evaluated the effect of C. glabrata β-glucans on dendritic cell (DC) immunologic responses. Firstly, bone marrow-derived DCs (BMDCs) were induced with C. glabrata β-glucans in a dose-dependent manner. The expression …

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Macrophage Depletion Enhances Gut Dysbiosis And Severity In Sepsis Mouse Model, Pratsanee Hiengrach Jan 2022

Macrophage Depletion Enhances Gut Dysbiosis And Severity In Sepsis Mouse Model, Pratsanee Hiengrach

Chulalongkorn University Theses and Dissertations (Chula ETD)

Macrophage is vital players in the responsiveness of the innate immune system against injury or infection. Although macrophage depletion is well-known for some emerging therapies, such as osteoporosis, osteopenia, and decreasing tumor-associated macrophages in melanoma, dysfunction of macrophages leads to an inability of an appropriate immune response and implicated in various disease processes, especially intestinal macrophages that play a key role in the gut immune system and the regulation of gastrointestinal physiology. To obtain an understanding of the role of sepsis-associated macrophages, clodronate was used for the dysfunction of mouse macrophages with and without cecal ligation and puncture (CLP) sepsis. …

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Epigenetic Regulation In Trained And Tolerized Macrophages, Salisa Benjaskulluecha Jan 2022

Epigenetic Regulation In Trained And Tolerized Macrophages, Salisa Benjaskulluecha

Chulalongkorn University Theses and Dissertations (Chula ETD)

Innate immune memory is the phenomenon that can either enhance (trained) or suppress (tolerized) immune response by innate immune cells during the second encounter of the stimuli such as pathogens. Previous studies reported that epigenetic regulations critically regulate both types of innate immune memory. However, a complete understanding of the underlying mechanisms is still lacking. In this study, we performed a screening of an epigenetics compound library to identify inhibitors that affect ß-glucan (BG)-trained or LPS-tolerized macrophages. Among 181 compounds tested, various inhibitors targeting Aurora kinase, histone methyltransferase PRMT and EZH2, histone demethylase LSD1 and JMJD2, histone deacetylase 6 and …

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Effect Of Inter-Observer Delineation Variability On Radiomics Features In Nasopharyngeal Cancer, Pongpitch Panyura Jan 2022

Effect Of Inter-Observer Delineation Variability On Radiomics Features In Nasopharyngeal Cancer, Pongpitch Panyura

Chulalongkorn University Theses and Dissertations (Chula ETD)

Nasopharyngeal cancer (NPC) is a type of head and neck cancer that is prevalent in China and Southeast Asia. The standard treatment for NPC is radiation therapy (RT), which requires accurate target volume delineation (TVD) to ensure an effective radiation dose while minimizing damage to surrounding healthy tissues. However, TVD is subject to intra- and inter-observer variability, which can affect the accuracy of RT and lead to unstable results in radiomics analysis. Radiomics is a technique that extracts quantitative data from medical images, but it is currently limited by the manual process of tumor delineation. This study aims to investigate …

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Regulatory T Cell In Drug-Induced Severe Cutaneous Adverse Reactions (Scars) During Acute And Recovery Phase, Suparada Khanaruksombat Jan 2022

Regulatory T Cell In Drug-Induced Severe Cutaneous Adverse Reactions (Scars) During Acute And Recovery Phase, Suparada Khanaruksombat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a type of SCARs induced by various drugs. The autoimmune consequences were observed throughout the recovery phase ranging between 10 – 20 % of DRESS patients. The dynamics of regulatory T cells (Tregs) are thought to be responsible for the many symptoms of DRESS. They may be a key player in developing autoimmune sequelae in this syndrome. This study concentrated on the number and function of CD4+CD25+CD127-FoxP3+ Tregs in autoimmune development in DRESS patients. CD4+CD25+CD127-FoxP3+ Tregs and their immunophenotyping were characterized using peripheral blood mononuclear cells (PBMCs) from patients by Flow …

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Evaluation Of Tissue Adequacy In Patients With Malignant Intrathoracic Lymphadenopathy Undergoing Combined Endobronchial Ultrasound-Guided Miniforceps Biopsy (Ebus-Mfb) And Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration (Ebus-Tbna) Compared To Ebus-Tbna Alone, Pipu Tavornshevin Jan 2022

Evaluation Of Tissue Adequacy In Patients With Malignant Intrathoracic Lymphadenopathy Undergoing Combined Endobronchial Ultrasound-Guided Miniforceps Biopsy (Ebus-Mfb) And Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration (Ebus-Tbna) Compared To Ebus-Tbna Alone, Pipu Tavornshevin

Chulalongkorn University Theses and Dissertations (Chula ETD)

RATIONALE: EBUS-TBNA has become an effective way of tissue assessment for evaluating mediastinal lymph nodes. Identifying molecular mutations is a key to personalized management in malignant disease. The success of molecular analysis depends on adequate tissue specimens consisting of an absolute number of tumor cell counts and the neoplastic cell percentage (NCP) estimation. This study aimed to evaluate the efficacy of EBUS-MFB added on EBUS-TBNA to improve the tissue adequacy and the overall diagnostic yield. In this prospective study, patients with enlarged intrathoracic lymph nodes underwent EBUS-TBNA followed by EBUS-MFB. The tissue adequacy for molecular analysis required that the tissue …

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Genetic Analysis Of Focal Segmental Glomerulosclerosis In Thailand, Suramath Isaranuwatchai Jan 2022

Genetic Analysis Of Focal Segmental Glomerulosclerosis In Thailand, Suramath Isaranuwatchai

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: The genetic variants spectra of focal segmental glomerulosclerosis (FSGS) vary among different populations. Here we described the clinical and genetic characteristics of biopsy-proven FSGS patients in Thailand. We also used special staining in renal biopsy tissue to describe protein expression related to the variants found by whole-exome sequencing (WES). Also, a functional study in cells was studied to investigate the etiologic evidence of the variants found by WES. Methods: Fifty-three unrelated FSGS patients without secondary causes were included in our study. Whole-exome sequencing (WES) was subsequently performed. Immunohistochemistry (IHC) staining method was used to characterize the morphology of renal …

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Anxiety And Social Experience Stressors Of Lgbt In Thailand, Bunatta Aritatpokin Jan 2022

Anxiety And Social Experience Stressors Of Lgbt In Thailand, Bunatta Aritatpokin

Chulalongkorn University Theses and Dissertations (Chula ETD)

The enhancement of the quality of life, according to the Sustainable Development Goals set by the United Nations (UN-SDG), places importance in equality for all groups of people, in all aspects. In this regard, although the Thailand sphere has been praised for its efforts to demonstrate its progressiveness regarding equality for groups who are more vulnerable to stressors, in practice, it is still quite lacking which could cause issues with mental health, such as anxiety and other stressors. This descriptive cross sectional quantitative research study explores the anxiety and social experience stressors of once such group - those of different …

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Effect Of Thiosulfate On The Passivation Of Zinc-Alloyed Anodes, (Z32120 And Z13000) At 80°C After 288h Immersion In 3.5% Nacl Solution, Thwelt Thinzar Zaw Jan 2022

Effect Of Thiosulfate On The Passivation Of Zinc-Alloyed Anodes, (Z32120 And Z13000) At 80°C After 288h Immersion In 3.5% Nacl Solution, Thwelt Thinzar Zaw

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this research, the inhibition of passivation on Zn alloys (Z32120 with Al) and Z13000 without Al) in artificial seawater (3.5% NaCl) mixing with different thiosulfate concentrations (100ppm, 150ppm, 200ppm) were investigated electrochemically after 288h immersion at 80°C and compared the results with that of testing without thiosulfate in the environment. According to the Potentiodynamic polarization test results, it is found that the presence of thiosulfate (S2O32-) in the solution hinders the passivation that was formed during the immersion of Zn alloys between 120h and 288h at 80°C in the absence of thiosulfate. Thiosulfate effect promotes Cl- penetration for not …

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Phthalate Ester Biodegradation In Agricultural Soil Using Exogenous Bacterial Consortium Under Fertilizer Addition, Theodora Mega Putri Jan 2022

Phthalate Ester Biodegradation In Agricultural Soil Using Exogenous Bacterial Consortium Under Fertilizer Addition, Theodora Mega Putri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Phthalate esters (PAEs) have been classified as a priority contaminant due to their endocrine-disrupting properties and abundance in the environment. Previously, several PAE-degrading consortia were enriched from landfill soil. This study aimed to initially select a consortium with efficient degradation activity, to characterize based on degradation kinetics and community dynamics, and to evaluate bioaugmentation feasibility while maintaining activity through continuous transfer. It was obtained based on enriched consortium selection that LF-NK-DEHP could simultaneously degrade 92.9% 100 mg l-1 DBP and 63.4% 100 mg l-1 DEHP within seven days. Kinetic degradation revealed DBP degradation by LF-NK-DEHP to fit the modified Gompertz …

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A New Spinel High-Entropy Oxides Nanoparticles (Feconimnzn)3o4 As Anode Materials For Lithium-Ion Batteries, Maha Nur Aida Jan 2022

A New Spinel High-Entropy Oxides Nanoparticles (Feconimnzn)3o4 As Anode Materials For Lithium-Ion Batteries, Maha Nur Aida

Chulalongkorn University Theses and Dissertations (Chula ETD)

A novel (FeCoNiMnZn)3O4 HEO as an anode in lithium-ion batteries (LIBs) was developed for the first time. High-entropy oxide (HEO) of (FeCoNiMnZn)3O4 was synthesized using a hydrothermal technique to control size and crystallinity. We also synthesized oxides of each element (Fe, Co, Ni, Mn, Zn) from HEO composition under similar condition for comparison. The samples were then analyzed using XRD, SEM, TEM, EDS elemental mapping, surface area analysis, ICP-OES, and XPS. Cyclic voltammetry, galvanostatic charge-discharge, electrochemical impedance spectroscopy, and associated coulombic efficiencies were also used to study the electrochemical performance of (FeCoNiMnZn)3O4. Three samples with different preparation conditions, HEO-3, HEO-6, …

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Biopolymer Nanocomposites For Food And Healthcare Applications, Tatiya Siripongpreda Jan 2022

Biopolymer Nanocomposites For Food And Healthcare Applications, Tatiya Siripongpreda

Chulalongkorn University Theses and Dissertations (Chula ETD)

This dissertation focuses on development of biopolymers by integrating nanomaterials to improve the properties of pristine polymers for enhancing the performances of chemical sensors and laser desorption/ionization mass spectroscopy (LDI-MS) applied for food quality control health monitoring and biomedical applications. The dissertation is divided into 4 parts: the first part, polylactic acid and cellulose were used for dual detection platform of biogenic amines for food spoilage indication. Highly porous PLA film is fabricated by adding nanosized calcium carbonate resulted in high sensing element entrapment. On another side of platform, pristine cellulose is modified with graphene oxide and exploited a substrate …

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Awareness Of Medical Doctor On Medication-Related Osteonecrosis Of The Jaw In Osteoporosis Patients, Nachapol Supanumpar Jan 2022

Awareness Of Medical Doctor On Medication-Related Osteonecrosis Of The Jaw In Osteoporosis Patients, Nachapol Supanumpar

Chulalongkorn University Theses and Dissertations (Chula ETD)

Antiresorptive drugs are widely used to treat osteoporosis. A serious adverse effect of these drugs is medication-related osteonecrosis of the jaw (MRONJ). By informing and educating patients about MRONJ, providing proper dental referral, and monitoring the oral health of patients who receive antiresorptive agents, physicians can reduce the risk of MRONJ. We investigated the awareness and clinical practices of physicians in Thailand with regard to MRONJ. Physicians who prescribed antiresorptive drugs for osteoporosis filled out an online self-administered questionnaire about demographic characteristics, awareness, and practices related to MRONJ. Most respondents agreed that antiresorptive drugs may cause MRONJ (92.3%), that poor …

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Selective Conversion Of Cellulose Into 5-Hydroxymethylfurfural Over Modified Zeolite Catalysts In A Biphasic Solvent System, Oluwaseyi Ojelabi Jan 2022

Selective Conversion Of Cellulose Into 5-Hydroxymethylfurfural Over Modified Zeolite Catalysts In A Biphasic Solvent System, Oluwaseyi Ojelabi

Chulalongkorn University Theses and Dissertations (Chula ETD)

Lignocellulosic biomass mainly composed of cellulose which can be transformed through various thermochemical processes such as catalytic depolymerization, acid-catalyzed dehydration, pyrolysis, gasification, etc., into high-value chemicals for sustainable development and bio-based economy. 5-Hydroxymethylfurfural (HMF) is one of the potential platform bio-chemicals that can be obtained directly from lignocellulosic biomass via catalytic depolymerization and/or acid-catalyzed dehydration using a bifunctional catalyst for the manufacture of various renewable products. Protonic zeolites are bifunctional solid acid catalysts and are well known for their remarkable properties. Their large surface area could enable molecules to diffuse in and out of their pore systems. Moreso, their acidic …

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Anti-Adipogenic Activity Of 4,5,4'-Trihydroxy-3,3'-Dimethoxybibenzyl From Dendrobium Ellipsophyllum In 3t3-L1 Preadipocytes, Hnin Ei Ei Khine Jan 2022

Anti-Adipogenic Activity Of 4,5,4'-Trihydroxy-3,3'-Dimethoxybibenzyl From Dendrobium Ellipsophyllum In 3t3-L1 Preadipocytes, Hnin Ei Ei Khine

Chulalongkorn University Theses and Dissertations (Chula ETD)

Obesity and its global prevalence have become a threat to human health due to not only the abnormal lipid accumulation in the body as a result of aberrant expression levels in adipocyte differentiation and lipogenesis but also the underdeveloped pharmacotherapy. Recently, the bioactive compounds from the natural products have gained a lot of attention due to undertaking prophylactic and therapeutic effects on obesity. Here, we probed how 4,5,4′-trihydroxy-3,3′-dimethoxybibenzyl (TDB) extracted from an Thai orchid (Dendrobium ellipsophyllum) could exert its roles on the differentiation and function of murine (3T3-L1) and human (PCS-210-010) preadipocytes and offer some implications to modulate obesity. Cytotoxic …

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Effects Of Lipopolysaccharide On Mandibular And Tibial Bone Regenerationin A Murine Model Of Sle Induced By Fcγriib Deficiency, Sirikanda Jantaboon Jan 2022

Effects Of Lipopolysaccharide On Mandibular And Tibial Bone Regenerationin A Murine Model Of Sle Induced By Fcγriib Deficiency, Sirikanda Jantaboon

Chulalongkorn University Theses and Dissertations (Chula ETD)

Although systemic lupus erythematosus (SLE) is known as the autoimmune disease that triggers inflammation and bone impairment, the mechanisms leading to the decrease in bone regeneration remain inadequately characterized. Patients with SLE have been observed high prevalence in bone loss due to host immune responses that may induce host antimicrobial activities. Here, this study used systemic and local lipopolysaccharide (LPS) administration for mimicking infectious condition in FcγRIIB−/− mice as a lupus murine model. The results showed FcγRIIB lacking FcγRIIB−/− in mice with local and systemic LPS led to decreased cancellous bone volume in their drilled hole region of tibial and …

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Effects Of Academic Burnout On Study Engagement As Moderated By Resilience And Social Support: A Longitudinal Study, Suchada Ruengesri Jan 2022

Effects Of Academic Burnout On Study Engagement As Moderated By Resilience And Social Support: A Longitudinal Study, Suchada Ruengesri

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of this study was to examine the correlations between academic burnout, study engagement, resilience, and social support in the Thai education context. The study also aimed to investigate the effect of academic burnout on study engagement, moderated by resilience and social support after the transition from online learning to on-site learning due to the COVID-19 pandemic. Additionally, the study aimed to explore the effects of different types of social support on academic burnout, study engagement, and resilience. The current study included two data gathering occasions for hypothesis testing. The participants were undergraduate students aged between 18 to 25 …

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How Flash Manufacturing Pmi Is Affecting The U.S. Stock Market. An Empirical Study, Thurein Htet Myat Jan 2022

How Flash Manufacturing Pmi Is Affecting The U.S. Stock Market. An Empirical Study, Thurein Htet Myat

Chulalongkorn University Theses and Dissertations (Chula ETD)

This paper presents a comprehensive analysis of the relationship between the US Flash Manufacturing PMI news releases, returns, and volatilities of Russell 1000 and 2000 indexes. Using an autoregressive (AR) and generalized autoregressive conditional heteroskedasticity (GARCH) model, the study examines data from January 2015 to November 2022, encompassing both pre-pandemic, pandemic, and post-pandemic periods. The statistical analysis indicates that these news releases do not significantly influence stock returns, supporting the efficient market hypothesis. Various factors, including measurement errors and the unique circumstances of the Covid-19 pandemic, likely overshadowed the impact of PMI news releases. Additionally, the analysis finds no significant …

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A Study Of Potential Factor Investing Strategy From Esg Score And Intangible Capital In Thailand, Issaraphorn Voratavornviwat Jan 2022

A Study Of Potential Factor Investing Strategy From Esg Score And Intangible Capital In Thailand, Issaraphorn Voratavornviwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The independent_study aimed to examine the relationship between Environmental, Social, and Governance (ESG) scores and Intangible Capital Ratio (ICR) and their implications for buy-and-hold returns (BHR) and stock performance among Thai listed companies. The study focuses on firms listed on the Stock Exchange of Thailand (SET) with available ESG scores, covering the period from 2018 to 2022 (169 companies). The finding for the first objective found that an increase in the ESG score leads to a rise in the ICR, these findings highlight the importance of ESG scores and company size & high BTM in determining a firm’s ICR. However, …

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Effect Of Joining Paris Agreement To Green Bond Premium In Us Market, Onjira Sukijjakamin Jan 2022

Effect Of Joining Paris Agreement To Green Bond Premium In Us Market, Onjira Sukijjakamin

Chulalongkorn University Theses and Dissertations (Chula ETD)

The paper investigates whether green bonds are priced at a premium compared to conventional bonds by analyzing the yield spread between green bonds and comparable conventional bonds (where a negative yield spread indicates a premium). The study also examines the factors influencing the yield difference including the effect of participating in Paris Agreement to the green bond premium. Initially, the paper expected to find a negative green bond premium, indicating that green bonds have lower yields than comparable conventional bonds, as investors are willing to accept lower yields for the ESG benefits associated with green projects. However, the paper obtained …

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Is Greener Really Better? Stock Market Reaction To Green Bond Announcements, Evidence From Europe, Niya Somkerd Jan 2022

Is Greener Really Better? Stock Market Reaction To Green Bond Announcements, Evidence From Europe, Niya Somkerd

Chulalongkorn University Theses and Dissertations (Chula ETD)

Employing an event-study approach, we examine how the stock market responded to the offering of green bonds by non-financial companies listed on the European stock market from January 2013 to September 2022. We observed a drop, on average about 0.28%, in the company stock prices on the day they announced these offerings and the day after. Moreover, we found that investors react in the same manner for green bond announcements as for conventional bond announcements. We also studied if the Gavriilidis (2021)'s climate policy uncertainty index has any relationship with the market reactions. Our findings suggest that the index is …

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Post-Earnings Announcement Drift In Thai Reits - A Take From The Recent Pandemic, Chawan Ratapana Jan 2022

Post-Earnings Announcement Drift In Thai Reits - A Take From The Recent Pandemic, Chawan Ratapana

Chulalongkorn University Theses and Dissertations (Chula ETD)

The research explores the information content of earnings announcements in REITs operating in a market with less stable rental incomes. By examining the presence of Post-Earnings-Announcement Drift (PEAD) in Thai REITs, this study contributes to existing literature and investigates changes in market efficiency for REITs during the COVID-19 pandemic. Using the Earnings Announcement Returns (EAR) method, the study analyzes abnormal returns through visual analysis and a trust/firm-level regression framework. Findings indicate a PEAD effect as the baseline for abnormal returns in the local market, suggesting potential market inefficiencies. However, most variables in regression analysis do not significantly address the research …

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The Effect Of Capital Ratio On Risk, Efficiency And Profitability Of Insurance Companies: Evidence From Singapore And Thailand, Supanuch Limvisitsakul Jan 2022

The Effect Of Capital Ratio On Risk, Efficiency And Profitability Of Insurance Companies: Evidence From Singapore And Thailand, Supanuch Limvisitsakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research study examines the importance of capital ratios in assessing the financial health of insurance companies in the context of Singapore and Thailand. The primary objective is to investigate the extent to which capital ratios provide informative insights into the risk, efficiency, and profitability of insurance companies. The study covers both life and non-life insurance companies during the period from 2017 to 2021. The findings show that higher capital ratios correspond to lower liquidity risk, improved efficiency, and increased profitability. These results emphasize the importance of maintaining adequate capital reserves to ensure financial stability and enhance operational performance in …

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