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Determination Of Adsorption And Separation Of Co2/N2 And H2s/Ch4 Mixtures In Porous Materials By Molecular Simulation, Tanawut Ploymeerusmee
Determination Of Adsorption And Separation Of Co2/N2 And H2s/Ch4 Mixtures In Porous Materials By Molecular Simulation, Tanawut Ploymeerusmee
Chulalongkorn University Theses and Dissertations (Chula ETD)
The major resources of power plant in the world rely on coal and natural gas which are economical for generating electricity. Flue gases, mainly N2 and CO2, are produced and released into the atmosphere. The zeolitic imidazolate framework-90 (ZIF-90) obtains a high potential as being a candidate for several applications. Consequently, the basic knowledge of adsorption and diffusion of gases in this material is the key factor of improving this gas separation technique. The effect of adsorbed CO2 molecules on the lattice structure of ZIF-90 can lead to gate opening depending on the amount of adsorbed guest molecules and the …
Clinical Efficacy Of Silk Sericin Dressing With Collagen For Split-Thickness Skin Graft Donor Site Treatment, Apirujee Punjataewakupt
Clinical Efficacy Of Silk Sericin Dressing With Collagen For Split-Thickness Skin Graft Donor Site Treatment, Apirujee Punjataewakupt
Chulalongkorn University Theses and Dissertations (Chula ETD)
Sericin dressing containing collagen hydrolysate (SDC) was evaluated in this study, consisting of two phases of clinical trials. The clinical safety of SDC was determined using a patch test in 103 healthy volunteers (phase I). Most of the results (around 90%) in the SDC group were interpreted as negative and doubtful reactions, and the remaining results (around 10%) were weak reactions. After that, the clinical efficacy and safety of SDC were investigated in 21 patients with 30 split-thickness skin graft (STSG) donor sites (phase II). Each donor site was divided into two equal sites. SDC or the commercial dressing (Bactigras®) …
Production Optimization Of Porcine Reproductive And Respiratory Syndrome (Prrs) Virus Nucleocapsid Protein In Nicotiana Benthamiana, Boonyasit Porngarm
Production Optimization Of Porcine Reproductive And Respiratory Syndrome (Prrs) Virus Nucleocapsid Protein In Nicotiana Benthamiana, Boonyasit Porngarm
Chulalongkorn University Theses and Dissertations (Chula ETD)
Porcine Reproductive and Respiratory Syndrome virus (PRRSV) is a considerable pathogen to occur disease in pigs and effect to economic on the swine industry around the world including Thailand. Routine observation, rapid diagnosis of PRRSV infection is essential for effective monitoring and disease control. The serological assays using highly conserved viral nucleocapsid (N) protein are widely used for the detection of antibodies to the PRRSV. Accordingly, this study was aimed to produce the N-protein of the PRRSV in the plant system by using Nicotiana benthamiana. The N-protein gene was designed into four constructs that contained with and without the plant …
Antioxidant Activity Of Thunbergia Laurifolia Lindl. Ethanolic Extract In Keratinocytes, Buakotchaphan Jirabanjerdsiri
Antioxidant Activity Of Thunbergia Laurifolia Lindl. Ethanolic Extract In Keratinocytes, Buakotchaphan Jirabanjerdsiri
Chulalongkorn University Theses and Dissertations (Chula ETD)
Fine particulate matter (PM2.5) can cause skin damage through the induction of oxidative stress in epidermis. Antioxidants help counteract with cellular oxidant species and maintain cell homeostasis. This study aims to examine the protective effect of Thunbergia laurifolia lindl. ethanolic extract on PM2.5-mediated oxidative stress in epidermal keratinocytes. High-performance liquid chromatography with diode array detection was conducted for quantitative analysis of rosmarinic acid content in the extract. Cell viability was detected by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide assay. Intracellular ROS was monitored using 2’,7’-Dichlorodihydrofluorescein diacetate. Proteins related to p62-Keap1-Nrf2 signaling pathway were examined by western blot analysis. Expressions of Nrf2 and p62 …
Antioxidant With Antimelanogenic Activities Of Sericin Hydrolysates Optimized By Response Surface Methodology In Human Melanin-Generating Mnt-1 Cells, Keerati Joyjamras
Antioxidant With Antimelanogenic Activities Of Sericin Hydrolysates Optimized By Response Surface Methodology In Human Melanin-Generating Mnt-1 Cells, Keerati Joyjamras
Chulalongkorn University Theses and Dissertations (Chula ETD)
Sericin, a protein presenting in the wastewater from silk industry, causes water pollution and ecological problem. To increase economic value to this waste product, the optimum enzymatic condition that could create sericin hydrolysates with high antioxidant and antimelanogenic capacities was generated through response surface methodology (RSM). Response surface plots demonstrate the major role of temperature on scavenging capacity of sericin hydrolysates assessed via DPPH, FRAP and ORAC assays. Alcalase®-hydrolyzed sericin consisted of sericin-related peptides in differing amounts and smaller sizes compared with unhydrolyzed sericin, as respectively demonstrated by peptidomic and SDS-PAGE analysis. Pre-incubation with 20 mg/mL sericin hydrolysates digested by …
Development Of Plant-Produced Subunit Vaccine And Therapeutic Protein For Covid-19, Konlavat Siriwattananon
Development Of Plant-Produced Subunit Vaccine And Therapeutic Protein For Covid-19, Konlavat Siriwattananon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Due to the rapid transmission of the Coronavirus Disease 2019 (COVID-19) causing serious public health problems and economic burden, the development of effective therapeutic interventions is urgently needed for controlling the ongoing pandemic disease. In this study, we have transiently produced recombinant SARS-CoV-2 RBD and human ACE2 fused with the Fc region of human IgG1 in Nicotiana benthamianain in order to use as a preventive subunit vaccine and therapeutic against SARS-CoV-2. The recombinant SARS-CoV-2 RBD-Fc subunit vaccine was formulated with different commercially available adjuvants including aluminium hydroxide gel (Alum), AddaVaxTM (MF59), monophosphoryl lipid A from Salmonella Minnesota R595 (mPLA-SM), and …
Taxonomy And Biological Activities Of A Novel Saccharothrix Species From Soil Of Sichang Island, Md Abul Kalam Azad
Taxonomy And Biological Activities Of A Novel Saccharothrix Species From Soil Of Sichang Island, Md Abul Kalam Azad
Chulalongkorn University Theses and Dissertations (Chula ETD)
Actinobacteria are the sources of bioactive natural products. Rare actinobacteria are the less frequently isolated genera of actinobacteria. During an investigation of diversity of rare actinobacteria, actinobacteria isolate SC076T was isolated from a soil sample collected from Sichang Island, Chonburi Province, Thailand. The strain showed the highest 16S rRNA gene similarity to Saccharothrix australiensis DSM 43800T (98.58%) and Saccharothrix espanaensis DSM 44229T (98.58%). The zigzag morphology of the spore chain was observed on the aerial mycelia. meso-diaminopimelic acid was detected in the peptidoglycan. Whole-cell sugars contained rhamnose, ribose, mannose glucose and galactose. Polar lipids are phosphatidylethanolamine, hydroxyphosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol …
Effect Of Hydroquinone 5-O-Cinnamoyl Ester Of Renieramycin M On The Suppression Of Lung Cancer Stem Cells, Nattamon Hongwiangchan
Effect Of Hydroquinone 5-O-Cinnamoyl Ester Of Renieramycin M On The Suppression Of Lung Cancer Stem Cells, Nattamon Hongwiangchan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Cancer stem cells (CSCs) are distinct cancer populations with tumorigenic and self-renewal abilities. CSCs are drivers of cancer initiation, progression, therapeutic failure, and disease recurrence. Thereby, novel compounds targeting CSCs offer a promising way to control cancer. In this study, the hydroquinone 5-O-cinnamoyl ester of renieramycin M (CIN-RM) was demonstrated to suppress lung cancer CSCs. CIN-RM was toxic to lung cancer cells with a half-maximal inhibitory concentration around 15 µM. CIN-RM suppressed CSCs by inhibiting colony and tumor spheroid formation. In addition, the CSC population was isolated and treated and the CSCs were dispatched in response to CIN-RM within 24 …
Α-Glucosidase Inhibitors From Dendrobium Delacourii, Dendrobium Gibsonii And Aerides Multiflora, May Thazin Thant
Α-Glucosidase Inhibitors From Dendrobium Delacourii, Dendrobium Gibsonii And Aerides Multiflora, May Thazin Thant
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this study, three plants from the Orchidaceae family, i.e., Dendrobium delacourii, Dendrobium gibsonii, and Aerides multiflora, were investigated for their chemical constituents and α-glucosidase inhibitory activities. A total of thirty compounds were isolated and structurally characterized. Eleven known compounds were identified from Dendrobium delacourii, including hircinol, ephemeranthoquinone, densiflorol B, moscatin, 4,9-dimethoxy-2,5-phenanthrenediol, gigantol, batatasin III, lusianthridin, 4,4',7,7'-tetrahydroxy-2,2'-dimethoxy-9,9',10,10'-tetrahydro-1,1'-biphenanthrene, phoyunnanin E, and phoyunnanin C. Two new compounds, i.e., dihydrodengibsinin and dendrogibsol, were isolated from Dendrobium gibsonii, along with seven known compounds including ephemeranthol A, dengibsinin, nobilone, aloifol I, lusianthridin, denchrysan A, and 4-methoxy-9H-fluorene-2,5,9-triol. Four new compounds, i.e., aerimultins A-C and dihydrosinapyl dihydroferulate, …
Lipase Inhibitors From Dendrobium Senile, Myat Pann Phyu
Lipase Inhibitors From Dendrobium Senile, Myat Pann Phyu
Chulalongkorn University Theses and Dissertations (Chula ETD)
Obesity is characterized as an abnormal lipid metabolism due the imbalance between the energy intake and output. Pancreatic lipase is secreted by the pancreas and plays an important role in the digestion and absorption of lipids in the small intestine. Inhibition of pancreatic lipase enzyme can reduce dietary fat absorption which will lead to loss of weight and finally result in hypocholesterolemia and hypoglycemia. From the whole plant of Dendrobium senile, a new phenanthrene derivative was isolated, together with seven known compounds, including 2,5,7-trihydroxy-4-methoxyphenanthrene (1), moscatin (2), 2,5-dihydroxy-4,9-dimethoxyphenanthrene (3), moscatilin (4), aloifol I (5), 4,4ʹ,8,8ʹ-tetramethoxy[1,1ʹ-biphenanthrene]-2,2ʹ,7,7ʹ-tetrol (6), 2,2ʹ,7,7ʹ-tetrahydroxy-4,4ʹ-dimethoxy-1,1ʹ-biphenanthrene (7) and bleformin …
Identification, Antifungal And Plant Growth Promoting Activities Of Endophytic Actinomycetes From Orchids, Nisachon Tedsree
Identification, Antifungal And Plant Growth Promoting Activities Of Endophytic Actinomycetes From Orchids, Nisachon Tedsree
Chulalongkorn University Theses and Dissertations (Chula ETD)
Sixty-two endophytic actinomycetes were isolated from 15 Thai orchids. They were identified as Streptomyces (34 isolates), Micromonospora (21 isolate), Streptosporangium (2 isolates), Actinomadura (1 isolates), Amycolatopsis (3 isolates) and Pseudonocardia (1 isolates) based on their phenotypic, chemotaxonomic and genotypic characteristics. The antimicrobial activity screening revealed that Streptomyces (18 isolates), Micromonospora (12 isolates) and Streptosporangium (1 isolate) exhibited antimicrobial activity against Bacillus subtilis ATCC 6633, Kocuria rhizophila ATCC 9341, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853 and Candida albicans ATCC 10231. Strain DR2-2 could inhibit all tested pathogens. Based on 16S rRNA gene sequencing, strain DR6-1 …
Extraction Of Cannabinoids Using Vegetable Oils And Its Uva-Photoprotective Effect On Human Skin Keratinocytes, Nur Alfan Muhammad Zen
Extraction Of Cannabinoids Using Vegetable Oils And Its Uva-Photoprotective Effect On Human Skin Keratinocytes, Nur Alfan Muhammad Zen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, vegetable oil has attracted attention in its role as an alternative solvent. Its ability to dissolve various active compounds from plants has been proven by several previous studies. Moreover, other benefits of the use of vegetable oil as a solvent are affordable, non-toxic, and eco-friendly. The extraction process is one of the crucial factors that affect the quality of cannabis. Ethanol is still consistently the best solvent for cannabis extraction in terms of yield production compared to other organic solvents used in this study including oil whose yield cannot be calculated since vegetable oil cannot be evaporated. HPTLC fingerprint …
Production And Characterization Of Escherichia Coli Outer Membrane Vesicles Displaying Anti-Muc1 Single-Chain Variable Fragment Via Spytag/Spycatcher System, Sedthawut Laotee
Production And Characterization Of Escherichia Coli Outer Membrane Vesicles Displaying Anti-Muc1 Single-Chain Variable Fragment Via Spytag/Spycatcher System, Sedthawut Laotee
Chulalongkorn University Theses and Dissertations (Chula ETD)
Outer membrane vesicles (OMVs) secreted from Gram-negative bacteria have been discovered for a decade. Special features like high stability, ease of production, and intrinsic adjuvanticity highlight the use of OMVs in diverse applications such as vaccination, bioimaging, and multifunctional delivery systems. Synthetic biological approaches can functionalize OMVs to present heterologous proteins by expressing genetic fusion of target protein to outer membrane proteins. However, complex proteins cannot be incorporated into the OMVs due to lack of some post-translational modifications in bacteria. Herein, we demonstrated a convenient method for presentation of versatile proteins in OMVs with the implementation of the bio-ligation system …
3,4-Dihydroxy-5,4’-Dimethoxybibenzyl Sensitizes Non-Small Cell Lung Cancer Cells To Cisplatin-Induced Apoptosis Via P53 Upregulation, Hardyanti Eka Putri
3,4-Dihydroxy-5,4’-Dimethoxybibenzyl Sensitizes Non-Small Cell Lung Cancer Cells To Cisplatin-Induced Apoptosis Via P53 Upregulation, Hardyanti Eka Putri
Chulalongkorn University Theses and Dissertations (Chula ETD)
Lung cancer is a leading fatal malignancy with the highest number of cancer deaths. Targeting a specific protein regulating cancer progression and metastasis has been attracting much attention for the development of cancer therapy. Thus, this study was aimed to investigate the effect of 3,4-dihydroxy-5,4′-dimethoxybibenzyl (DS-1) in targeting MDM2-attenuating p53 function and inhibition EMT in lung cancer cells. The efficacy of DS-1 or combined with cisplatin in lung cancer cells was determined by MTT, nuclear staining, and Annexin V/PI assays. The expression of apoptosis- and EMT-related proteins was determined by western blot analysis. Metastatic behaviors were evaluated by cell shape …
Cross-Cultural Adaptation And Psychometric Properties Of The Thai Version Of The Neurophysiology Of Pain Questionnaire, Pichet Pasangkayo
Cross-Cultural Adaptation And Psychometric Properties Of The Thai Version Of The Neurophysiology Of Pain Questionnaire, Pichet Pasangkayo
Chulalongkorn University Theses and Dissertations (Chula ETD)
Background: Pain neurophysiology knowledge is hypothesized to influence pain beliefs and physical performance in individuals with chronic low back pain (LBP). Valid and reliable measures of such knowledge is important to evaluate the pain treatment on this domain as well as to understand its role in both physical and psychological functions of individuals with chronic pain. This study aimed to culturally adapt the revised Neurophysiology of Pain Questionnaire into Thai (T-rNPQ), using the Functional Assessment of Chronic Illness Therapy (FACIT) methodology, and to evaluate its reliability and validity. Two hundred sixty-three individuals with chronic LBP completed the T-rNPQ and seven …
Towards Explainable Sentiment Analysis For Written Reviews Via Quantum Tensor Network States, Chanatip Mangkang
Towards Explainable Sentiment Analysis For Written Reviews Via Quantum Tensor Network States, Chanatip Mangkang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Recurrent Neural Networks (RNNs) have shown an incredible performance in supervised machine learning tasks such as Natural Language Processing (NLP). However, theoretical understanding of RNNs' performances in NLP are still limited due to intrinsically complex non-linear computations of RNNs. This thesis explores a class of RNNs called Recurrent Arithmetic Circuits (RACs), possessing a dual mathematical representation as a Matrix Product State (MPS) widely used in many-body quantum physics. The duality allows us to compute the entanglement entropy of an MPS, which can be used as a proxy for information propagation in the dual neural networks, to phenomenologically explain the RNNs-based …
Performance Of Memory Function Based On Naturalistic Data, Chanin Kumpeerakij
Performance Of Memory Function Based On Naturalistic Data, Chanin Kumpeerakij
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nonlinear dynamical systems, such as well-tuned recurrent neural networks, have proved a powerful tool for modeling temporal data. However, tuning such models to achieve the best performance remains an outstanding challenge, not least because of the complex behaviors that emerge from interacting microscopic constituents. Here, we consider a minimal model of two interacting phase oscillators coupled to a thermal bath and driven by a common signal. We quantify the memory and predictive capability of the system with the mutual information between the phases of oscillators and the signals at different times. We show that the interaction and heterogeneity between oscillators …
Stability And Electronic Structure Of Magnesium Hydride And Magnesium Deuteride Under High Pressure, Chayaphon Boonchot
Stability And Electronic Structure Of Magnesium Hydride And Magnesium Deuteride Under High Pressure, Chayaphon Boonchot
Chulalongkorn University Theses and Dissertations (Chula ETD)
Metal polyhydrides have attracted interest because some of them transform into metals under high pressure, while others initiate a phase transition to become superconductors. It was recently discovered that some superconducting metal polyhydrides have a high critical temperature (Tc ) under pressure. We calculate the structures of MgH2 (FCC), MgH2 (HCP), and MgH3 under pressures ranging from 0-300 GPa in order to determine the formation enthalpy and electronic properties under high pressure. We also replaced the hydrogen atoms with deuterium (D). The convex hulls of MgH2 (FCC), MgH2 (HCP), and MgH3 (FCC) calculated at pressures from 0 to 300 GPa. …
Design And Fabrication Of Perovskite Solar Cells For Tandem Structures, Kwanruthai Butsriruk
Design And Fabrication Of Perovskite Solar Cells For Tandem Structures, Kwanruthai Butsriruk
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this thesis, fabrication processes for making perovskite solar cells (PSCs) suitable for tandem structures are described. We find that different conditions of fabrication significantly affect the perovskite absorber film properties and power conversion efficiency (PCE) of PSCs. To achieve the best quality, perovskite absorber films were prepared by two-step spin coating from PbI2 and CH3NH3I (MAI) precursors, and solar cell yielded a maximum PCE of 17.2% and 15.4% for a normal and an inverted PSCs, respectively. These PSCs can be applied to the design and fabrication of tandem solar cells (TSCs) that consist of PSCs as a top subcell …
Ab Initio Calculations On Superconducting Metal-Hydride And Perovskites For Energy Applications, Wiwittawin Sukmas
Ab Initio Calculations On Superconducting Metal-Hydride And Perovskites For Energy Applications, Wiwittawin Sukmas
Chulalongkorn University Theses and Dissertations (Chula ETD)
Superconducting hydrides and photovoltaic perovskites for energy applications are studied by means of the density functional theory-based calculations. First of all, the new decoration of Mg0.5Ca0.5H6 is confirmed thermodynamically stable over the pressures ranging from 200 to 400 GPa. The electronic properties reveal the possibility for this very material of becoming a superconductor under pressures. As a result, by performing electron-phonon coupling (EPC) calculations, Mg0.5Ca0.5H6 is found to superconduct at a maximum critical temperature of 288 K at 200 GPa, which completely exceeds those of its parent compounds, i.e. MgH6 and CaH6. Secondly, the van de Waals (vdW) interaction is …
Effect Of Pongol Methyl Ether On Cancer Stem Cell Phenotypes In Human Non-Small Cell Lung Cancer Cells, Arnon Silapech
Effect Of Pongol Methyl Ether On Cancer Stem Cell Phenotypes In Human Non-Small Cell Lung Cancer Cells, Arnon Silapech
Chulalongkorn University Theses and Dissertations (Chula ETD)
Cancer stem cells (CSCs) are an important therapeutic target. The therapeutic agents targeting CSCs should lead to improved clinical outcomes. This study demonstrated the CSC suppressing activity of pongol methyl ether (PME), a pure compound from Millettia erythrocalyx Gagnep. CSC-suppressing effects were evaluated by colony formation assay, anchorage independent growth assay, spheroid formation assay and detection of CSC markers. The related CSC cell signals were evaluated by Western blot, immunofluorescence and molecular docking analysis. Proteins affected by PME treatment were subjected to bioinformatic analysis. Protein–protein interaction (PPI) networks were constructed by the Search Tool for Interactions of Chemicals (STITCH). The …
Effects Of Low Degree Of High Ambient Temperature On Neural Pathways From Median Preoptic Nucleus To Arcuate Nucleus In Related To Food Intake., Pornsiri Suwannapaporn
Effects Of Low Degree Of High Ambient Temperature On Neural Pathways From Median Preoptic Nucleus To Arcuate Nucleus In Related To Food Intake., Pornsiri Suwannapaporn
Chulalongkorn University Theses and Dissertations (Chula ETD)
High ambient temperature (HTa) is one important environmental factor that decreases food intake (FI). It is well accepted that high degree HTa induced heat stress decreased FI by the activation of corticotropin-releasing factor (CRF) via hypothalamic pituitary adrenal axis. However, short-term low-degree HTa exposure has been demonstrated to decrease FI earlier than activated physiological and stress responses. This effect was related to the neuronal connection between the median preoptic nucleus (MnPO) and arcuate nucleus (Arc). Therefore, the present study aimed to investigate the effect of short-term low-degree HTa exposure on the activity of hypothalamic Arc in regarding to FI, and …
The Effect Of Population Structure On Economic Development: Thailand's Provincial Panel Data, Satayu Pattarakijkusol
The Effect Of Population Structure On Economic Development: Thailand's Provincial Panel Data, Satayu Pattarakijkusol
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research investigates the effects of demographic change, the change of labor supply, and human capital on Thailand’s economic development. This will help shed light on the relationship between population (quantitatively and qualitatively) and economic development. The demographic dividends, the neoclassical growth Solow-Swan model, and human capital are adopted as the conceptual framework for this research. The secondary panel data at the provincial level from government officials will be used for statistical analysis. Fixed effect or random effect with lagged dependent variable is introduced into the estimated model. The finding suggests that the labor productivity, employment level, share of the …
The Efficacy Of Universal Ceramic Polishing Kit On The Surface Roughness Of Various Ceramic Types, Ekaluck Poosanthanasarn
The Efficacy Of Universal Ceramic Polishing Kit On The Surface Roughness Of Various Ceramic Types, Ekaluck Poosanthanasarn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of this vitro study was to determine the effect of polishing performance of a universal ceramic polishing kit on the surface roughness of various ceramics. The ceramic specimen size 5 x 7 x 4 mm of lithium disilicate glass ceramic (IPS e.max CAD, Ivoclar Vivadent, Liechtenstein), translucent zirconia (VITA YZ XT, VITA Zahnfabrik, Germany) and zirconia-reinforced lithium silicate (Celtra Duo, Dentsply Sirona, United States) (n=8) were fixed with clear resin in PVC block, 14 mm in diameter. The specimens were ground with fine diamond bur for 15 seconds to simulate clinical gross contouring.The two-step polishing process started with …
Evaluation And Assessment Of The Near Field Behind 3d Printed-Modulators For Proton Beam Therapy, Warisara Charuchinda
Evaluation And Assessment Of The Near Field Behind 3d Printed-Modulators For Proton Beam Therapy, Warisara Charuchinda
Chulalongkorn University Theses and Dissertations (Chula ETD)
A 3D-printed modulator is an innovation developed for particle therapy delivery systems that enables a highly conformal and homogeneous dose distribution around the tumor within a very short irradiation time. In normal cases, the modulators are positioned far from the patient in order to avoid the field inhomogeneity resulting from the periodic structure of the modulators on patient’s skin. However, a smaller distance between the modulator and patient would provide a better dose conformation in the target volume. In this thesis, the FLUKA Monte Carlo simulation program was used to investigate the fluence distributions of protons penetrating through 3D-printed modulators …
The Effects Of The Oral Exercises On The Oral Function Of People With Dementia, Kwanrutai Somsak
The Effects Of The Oral Exercises On The Oral Function Of People With Dementia, Kwanrutai Somsak
Chulalongkorn University Theses and Dissertations (Chula ETD)
The objective of this study was to examine the effects of the home-based oral exercises on the oral function in people with mild to moderate dementia. The patients with mild to moderate dementia at King Chulalongkorn Memorial Hospital, who were randomly allocated to an experimental group (n = 11), were asked to perform 3 home-based oral exercises for 3 months while those in a control group (n = 11) did not do any oral exercises. The oral function including maximum tongue pressure (MTP), oral diadochokinesis (ODK) rates of /ta/, /ka/, /pa/, swallowing function (modified water swallowing test: MWST), and oral …
Antifungal, Physical, And Mechanical Properties Of Tissue Conditioner Incorporated With Zinc Oxide Nanoparticles, Woraporn Homsiang
Antifungal, Physical, And Mechanical Properties Of Tissue Conditioner Incorporated With Zinc Oxide Nanoparticles, Woraporn Homsiang
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study evaluated the antifungal, physical, and mechanical properties of tissue conditioner incorporated with different amounts of zinc oxide nanoparticles (ZnOnps) at different storage times (0, 7, and 14 days). Specimens of 0, 5, 10, 15 wt% ZnOnps, or 15 wt% nystatin incorporated into tissue conditioner were fabricated. The direct contact test (n=6) was performed to evaluate the antifungal effect against C. albicans suspension. Scanning electron microscopy and energy dispersive X-ray spectroscopy (n=6) were used to observe the amount and distribution of superficial zinc element. The penetration depth (n=6) and tensile bond strength (n=8) were evaluated following ISO 13139. The …
Investment Model Of Commitment To Parasocial Interaction And Purchase Intention Among Beauty Youtuber Followers, Parima Kosakarn
Investment Model Of Commitment To Parasocial Interaction And Purchase Intention Among Beauty Youtuber Followers, Parima Kosakarn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Internet celebrities, such as Youtuber, have become an important figure in influencing purchase intention among viewers. This effect was linked to the parasocial interaction, which is prominently studied in communication and marketing fields. This research aimed to broaden this link by using a social psychological theory. Thus, the purpose of this research was to examine the effect of commitment (according to the Investment Model of Commitment Processes) and parasocial interaction on purchase intention of endorsed beauty products. Data were collected using internet-based survey from 181 participants, who were (1) Youtube users i.e., having Youtube accounts, (2) subscribing to a channel …
Testing Of A New Job Crafting Measure And Intervention To Enhance Thai Healthcare Professionals' Motivation, Work Engagement And, Job Performance, Pichaya Rochanadumrongkul
Testing Of A New Job Crafting Measure And Intervention To Enhance Thai Healthcare Professionals' Motivation, Work Engagement And, Job Performance, Pichaya Rochanadumrongkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
The present research consisted of two studies. In Study I, the objective was to develop and validate the job crafting measure in related to the levels of motivation, work engagement and job performance in Thai healthcare professionals using structured interview and structure equation model (SEM). Qualitative method using the interview (N = 20) was employed to extract employees’ experiences of crafting their job and explore additional dimension of job crafting. The results of the interview revealed an additional dimension of job crafting namely "humor” for Thai Job Crafting Behavior scale (Thai JCB) (physical crafting, relational crafting, cognitive crafting and humor). …
A Multi-Time-Point Study Of Newborn Self-Regulation And Child Self-Regulation In The First Two Years Of Life: The Mediating Effects Of Child Anger Temperament And Quality Of Mother-Child Interaction, Pimjuta Nimmapirat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Studies on the development of child self-regulation during the first two years of life are limited. This study examined the association between newborn self-regulation at 1 month old and child self-regulation at 2 years old, with the child anger temperament and quality of mother-child interaction at 1 year and 2 years of age as the nature and nurture mediators for child selfregulation. The participants were 322 mother-child dyads in Chomthong and Fang districts, Chiangmai. The study was a multiple time-point design with a longitudinal data collection from the mothers and children at 1 month, 1 year, and 2 years of …