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2018

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Use Of Binary Surfactant Formulations In Low Ift Foam And Surfactant Flood, Sorrawit Tantipalakul Jan 2018

Use Of Binary Surfactant Formulations In Low Ift Foam And Surfactant Flood, Sorrawit Tantipalakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Viscous fingering and early breakthrough are the main problems observed during the water flooding. These problems could be overcome by using foam flooding by coinjection of surfactant solution and nitrogen gas as a mobility control in a porous media to help improve the sweep efficiency. To gain the maximum benefits of foam flooding, ultra-low interfacial tension foam was studied to obtain a foaming system with high sweep efficiency and at the same time high oil solubilization to help mobilize the oil phase from reservoir rock. In this work, mixed surfactant systems between sodium dioctylsulfosuccinate (AOT) and internal olefin sulfonate (IOS) …

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Conversion Of N-Pentane To Aromatics: Effect Of Surface Modification By Chemical Liquid Deposition And Promoter Over Nano Scale Ga/Hzsm-5, Sukkatad Sintapanin Jan 2018

Conversion Of N-Pentane To Aromatics: Effect Of Surface Modification By Chemical Liquid Deposition And Promoter Over Nano Scale Ga/Hzsm-5, Sukkatad Sintapanin

Chulalongkorn University Theses and Dissertations (Chula ETD)

This work studied the effects of chemical liquid deposition, i.e., TEOS concentration and multicycle silylation on Ga/HZSM-5 on their catalytic performance in aromatization of n-pentane. The parent nano scale HZSM-5 zeolite catalysts were incorporated with Ga by impregnation method followed by silylation via chemical liquid deposition (CLD) using tetraethyl orthosilicate (TEOS) by varying concentrations and number of cycles. Moreover, the small amount of Pt, Zn, La and P was introduced by co-impregnation method to study the effect of promoter. The physical and chemical properties of catalysts were characterized by N2 physisorption, XRD, NH3-TPD, IPA-TPD, TPO, TPR, SEM and 27Al MAS …

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Development Of Lcsoft As A Tool For Life Cycle Assessment Of Environmental Impacts : Incorporating Additional Lcia Methodologies And Environmental Footprint, Tanathip Rattanatum Jan 2018

Development Of Lcsoft As A Tool For Life Cycle Assessment Of Environmental Impacts : Incorporating Additional Lcia Methodologies And Environmental Footprint, Tanathip Rattanatum

Chulalongkorn University Theses and Dissertations (Chula ETD)

Life Cycle Assessment (LCA) is a technique to calculate, assess, and analyze environmental impacts through the entire life cycle of products. LCSoft has been continuously developed as LCA software which has ability to integrate with other software e.g. process simulation software and economic analysis software. In addition, LCSoft has several functions which can analyse various environmental effects such as sensitivity analysis, alternative comparison, and eco efficiency analysis. In this thesis, several features were added into LCSoft to cover a wider application range from users and more industrial technologies. This thesis consists of four main parts. First, adding more essential equipment …

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Furfurylamine-Based Polybenzoxazine Adsorbent For Co2 Capture: Effect Of Carbonization Temperature And Activation Methods, Thanabhumi Vongtiang Jan 2018

Furfurylamine-Based Polybenzoxazine Adsorbent For Co2 Capture: Effect Of Carbonization Temperature And Activation Methods, Thanabhumi Vongtiang

Chulalongkorn University Theses and Dissertations (Chula ETD)

Carbon sorbents are of interest for post-combustion CO₂ capture. Polymers are one of the potential precursors to develop carbon adsorbent with suitable surface functionalities. In this research, furfurylamine-based polybezoxazine was used to produce the carbon adsorbent because of its superior properties such as high char yield, high thermal stability, and low water adsorption. To obtain the carbon adsorbent, benzoxazine monomer was prepared by using furfurylamine, paraformaldehyde, and phenol. Polymerization by a sol-gel technique using xylene as a solvent was employed. The obtained polymer was carbonized at various temperatures: 600, 700, and 800 °C. Physical and chemical activation were then conducted …

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Development Of Group-Contribution Models For Use In Surfactant Selection - Case Studies Of Single And Mixed Surfactant Applications, Woramet Chanachichalermwong Jan 2018

Development Of Group-Contribution Models For Use In Surfactant Selection - Case Studies Of Single And Mixed Surfactant Applications, Woramet Chanachichalermwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microemulsion is the surfactant/oil/water system that is applied to many applications such as enhanced oil recovery, cleaning agents, environmental remediation and drug delivery system. To select the suitable surfactant to form an efficient microemulsion system for each specific condition and application, a systematic selection method is needed to reduce time and valuable resources that may be required in the design of an interest product. This work developed a systematic method to select suitable surfactants for a specific application based on several properties including but not limited to types of emulsion, emulsion stability, solubility and toxicology. Since not all models are …

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Development Of A Determinant Scale Of Pharmacist’S Care For Herbal And Dietary Supplement Users, Mohd Shahezwan Abd Wahab Jan 2018

Development Of A Determinant Scale Of Pharmacist’S Care For Herbal And Dietary Supplement Users, Mohd Shahezwan Abd Wahab

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: There is a lack of instrument that is valid and reliable to measure the determinant of pharmacist's care (PCare) for herbal and dietary supplement (HDS) users. The present study aimed to develop scales to measure the determinant of PCare for HDS users and to quantify the practices. The study utilized qualitative and quantitative approaches. Methods: Three scales were developed: Direct TPB scale based on a modified Theory of Planned Behaviour (m-TPB) framework, Indirect TPB scale based on the m-TPB and beliefs elicited from community pharmacists (CPs), and PCare-HDS scale based on findings from the qualitative study. This study involved …

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Taxonomy And Secondary Metabolites Of Selected Endophytic Actinomycete Strains, Nattakorn Kuncharoen Jan 2018

Taxonomy And Secondary Metabolites Of Selected Endophytic Actinomycete Strains, Nattakorn Kuncharoen

Chulalongkorn University Theses and Dissertations (Chula ETD)

A total of 50 endophytic actinomycetes isolated from fourteen plant species collected from six provinces of Thailand including Bangkok, Chachoengsao, Chiang Mai, Nakhon Pathom, Prachinburi and Suphan Buri were taxonomically studied relied on their phenotypic and chemotaxonomic characteristics, and the 16S rRNA gene sequence analysis. The isolates were identified as members of the family Streptomycetaceae involving Streptomyces (22 isolates), and the family Micromonosporaceae including Micromonospora (25 isolates), Plantactinospora (1 isolate) and Polymorphospora (1 isolate). Based on phenotypic characteristics, whole genome sequence analysis and DNA-DNA hybridization, 5 novel actinomycete species were proposed consisting of Micromonospora globbae (strain WPS1-2T), Micromonospora azadirachtae (strain …

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Alpha-Glucosidase Inhibitors From Dendrobium Scabrilingue, Chalermporn Sarakulwattana Jan 2018

Alpha-Glucosidase Inhibitors From Dendrobium Scabrilingue, Chalermporn Sarakulwattana

Chulalongkorn University Theses and Dissertations (Chula ETD)

Phytochemical study of the methanol extract of the whole plant of Dendrobium scabrilingue Lindl. (Orchidaceae) resulted in the isolation of a new phenanthrene and a new bisbibenzyl namely dendroscabrols A and B, respectively, along with eight known compounds, identified as (Z)-ferulic acid tetracosyl ester, (E)-ferulic acid tetracosyl ester, gigantol, batatasin III, coelonin, aloifol I, lusianthridin and RF-3192C. The structures of these isolated compounds were determined mainly by spectroscopic data. All isolates were examined for alpha-glucosidase inhibitory activity. Dendroscabrol B and RF-3192C exhibited the most potent activity. In addition, dendroscabrol A, gigantol, coelonin and lusianthridin displayed strong activity compared with the …

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Neuroprotective Effects Of The Standardized Extract Of Centella Asiatica Eca233 In Rotenone-Induced Parkinson’S Disease Model, Narudol Teerapattarakan Jan 2018

Neuroprotective Effects Of The Standardized Extract Of Centella Asiatica Eca233 In Rotenone-Induced Parkinson’S Disease Model, Narudol Teerapattarakan

Chulalongkorn University Theses and Dissertations (Chula ETD)

The standardized extract of Centella asiatica ECa233 consists of asiaticoside and madecassoside. Previous studies reported various pharmacological effects of, ECa233, especially in the central nervous system disorders. The present study aimed to investigate the neuroprotective effects and protective mechanisms of ECa233 against rotenone-induced neurotoxicity in rats and in neuroblastoma SH-SY5Y cells. In animal study, male Wistar rats were divided into five experimental groups (n=10); control, PD, PD-ECa10, PD-ECa30, and PD-EC100. On days 1-20, control and PD rats received 0.5% carboxymethylcellulose (CMC) (1 mL/kg, p.o.) while ECa233 10, 30 and 100 mg/kg (p.o.) were given to PD-ECa10, PD-ECa30, and PD-EC100, respectively. …

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Protective Effects Of Eriodictyol On Hydrogen Peroxide-Induced Cell Death In Sh-Sy5y Cells, Saowarose Thongin Jan 2018

Protective Effects Of Eriodictyol On Hydrogen Peroxide-Induced Cell Death In Sh-Sy5y Cells, Saowarose Thongin

Chulalongkorn University Theses and Dissertations (Chula ETD)

Oxidative stress and mitochondrial dysfunction are the major causes of neuronal death in neurodegenerative disorders. Eriodictyol is a flavonoid extracted from the whole plant of Dendrobium ellipsophyllum (thai name: Ueang Thong). The antioxidant and anti-inflammatory effects of eriodictyol have been widely reported. The present study aimed to investigate the protective effect and mechanisms of eriodictyol on hydrogen peroxide (H2O2)-induced cell death in human neuroblastoma SH-SY5Y cells. The protective effect of eriodictyol on cytotoxicity induced by H2O2 was evaluated using resazurin assay. The effects on intracellular reactive oxygen species (ROS) and mitochondria membrane potential were evaluated by 2´-7’ dichlorodihydrofluorescein diacetate (DCFH-DA) …

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Novel Regulatory Mechanisms Of Protein Kinase B On Apoptosis Susceptibility And Cancer Dedifferentiation, Arnatchai Maiuthed Jan 2018

Novel Regulatory Mechanisms Of Protein Kinase B On Apoptosis Susceptibility And Cancer Dedifferentiation, Arnatchai Maiuthed

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.

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Pharmacokinetic Study Of Cucurbitacin B From Trichosanthes Cucumerina L. In Rats, Natthaphon Hunsakunachai Jan 2018

Pharmacokinetic Study Of Cucurbitacin B From Trichosanthes Cucumerina L. In Rats, Natthaphon Hunsakunachai

Chulalongkorn University Theses and Dissertations (Chula ETD)

Cucurbitacin B is a triterpenoid, majorly found in Cucurbitaceae family, particularly in the Trichosanthes cucumerina L. fruits. The pharmacological properties of cucurbitacin B have been studied for decades, particularly an anti-tumor and anti-inflammatory activity. However, the pharmacokinetic profile of this compound is still limited and the investigation is needed for further pharmaceutical product development. This study aimed to investigate the pharmacokinetic profile of cucurbitacin B after administering the compound at different doses and routes to the rats. Male Wistar rats, weighed approximately 400-500 g, were treated with cucurbitacin B extracted from Trichosanthes cucumerina L. The cucurbitacin B was administered at …

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Association Of Genetic And Non-Genetic Factors With Clinical Responses Of Donepezil And Galantamine In Thai Patients With Dementia, Thitipon Yaowaluk Jan 2018

Association Of Genetic And Non-Genetic Factors With Clinical Responses Of Donepezil And Galantamine In Thai Patients With Dementia, Thitipon Yaowaluk

Chulalongkorn University Theses and Dissertations (Chula ETD)

Donepezil and galantamine are commonly prescribed for the treatment of dementia. However, the response rate of acetylcholinesterase inhibitors is only 15-35 %. Inter-individual variability in donepezil and galantamine response has been associated with genetic factor in some population. Moreover, non-genetic factors such as age, gender, education level, comorbidities and drug-drug interactions can influence pharmacokinetic profiles and drug responses. Therefore, this study aims to investigate the association of genetic variations that involved therapeutic effects of donepezil and galantamine including pathogenic gene; APOE, drug metabolizing genes; CYP2D6, CYP3A5, UGT1A1, transporter gene; ABCB1 and non-genetic factors with therapeutic outcomes as measured as Thai …

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Consciousness Eliminated In Daniel Dennett, Jittiwat Narakornpaichit Jan 2018

Consciousness Eliminated In Daniel Dennett, Jittiwat Narakornpaichit

Chulalongkorn University Theses and Dissertations (Chula ETD)

One of the major debates in philosophy of mind is the complication about how to explain the manifestation of qualia in the scientific image. Qualia have usually been understood as phenomenal properties of mental states; and their resistance against physical explanation is famously demonstrated by Joseph Levine as the explanatory gap and by David Chalmers as the hard problem of consciousness. The aim of this thesis is to study and evaluate Daniel Dennett's response to the complication in this debate with his eliminativist approach on consciousness. The key idea of Dennett's so-called illusionism is that qualia only seem to exist …

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Cross-Cultural Adaptation And Psychometric Properties Of The Thai Version Of The Patient-Reported Outcomes Measurement Information System-29 (Promis-29), Polake Rawang Jan 2018

Cross-Cultural Adaptation And Psychometric Properties Of The Thai Version Of The Patient-Reported Outcomes Measurement Information System-29 (Promis-29), Polake Rawang

Chulalongkorn University Theses and Dissertations (Chula ETD)

Abstract Purpose To culturally adapt the Patient-Reported Outcomes Measurement Information System-29 into Thai (T-PROMIS-29) and evaluate the reliability and validity of the culturally adapted questionnaire. Methods The translation was performed using the Functional Assessment of Chronic Illness Therapy (FACIT) translation guidelines. Internal consistency and test-retest reliability at a 1-week interval for the translated measure were computed. Construct validity was evaluated by computing correlations between the T-PROMIS-29 scores and selected SF-36 and Fear Avoidance Belief Questionnaire (FABQ) scale scores for both convergent and discriminant validity. Results The study sample comprised of 241 participants with chronic low back pain. Internal consistencies were …

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Effect Of Cu(In,Ga)₃Se₅ Ultra-Thin Layer On Optical Properties And Photovoltaic Efficiency Of Cu(In,Ga)Se₂ Thin Film Solar Cells, Boonyaluk Namnuan Jan 2018

Effect Of Cu(In,Ga)₃Se₅ Ultra-Thin Layer On Optical Properties And Photovoltaic Efficiency Of Cu(In,Ga)Se₂ Thin Film Solar Cells, Boonyaluk Namnuan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Cu(In,Ga)3Se5 (135-CIGS) layers with various thicknesses were deposited on the surface of ~1.8 micron thick Cu(In,Ga)Se2 (112-CIGS) photon absorber in the fabrication of CIGS thin film solar cells. This significantly affects the shift of the optical band gap energy from 1.15 eV (112-CIGS) to 1.19 eV, with only 10 nm thick of 135-CIGS capping layer, leading to the increase in the open-circuit voltage (Voc) of the solar cells. The optical transmission spectra show no sign of separated 135-CIGS layer. The maximum Voc of 670 mV is obtained from 5-10 nm thick 135-CIGS capping layer on 112-CIGS compared to 646 mV …

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Application Of Adversarial Networks In Search For Four Top Quark Production In Cms, Vichayanun Wachirapusitanand Jan 2018

Application Of Adversarial Networks In Search For Four Top Quark Production In Cms, Vichayanun Wachirapusitanand

Chulalongkorn University Theses and Dissertations (Chula ETD)

One burden of high energy physics data analysis is uncertainty within the measurement, both systematically and statistically. Even with sophisticated neural network techniques that are used to assist in high energy physics measurements, the resulting measurement may suffer from both types of uncertainties. Fortunately, most types of systematic uncertainties are based on knowledge from information such as theoretical assumptions, for which the range and behaviour are known. It has been proposed to mitigate such systematic uncertainties by using a new type of neural network called adversarial neural network (ANN) that would make the discriminator less sensitive to these uncertainties, but …

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Effects Of Organic Molecule Orientations On Perovskite Structure Of Formamidinium Lead Iodide, Wiwittawin Sukmas Jan 2018

Effects Of Organic Molecule Orientations On Perovskite Structure Of Formamidinium Lead Iodide, Wiwittawin Sukmas

Chulalongkorn University Theses and Dissertations (Chula ETD)

Latterly, an emergence of the hybrid organic-inorganic perovskites has captivated an increasing rate of world-wide attention due to their approving physical properties. Formamidinium lead iodide (FAPI), a promising compound owing to its high photovoltaic performance, consists of an organic molecule, i.e. the formamidinium (FA) cation, dwelling in the centre of the cubic unit cell, caged by the inorganic framework, PbI6. By adopting the ab initio method based on the density functional theory including the spin-orbit coupling (SOC) effects, the effects of the FA cation on the cubic FAPI were thoroughly and systematically investigated. Solidly armed with Euler's rotations, energy landscapes …

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Effect Of Local Rewiring In Adaptive Epidemic Erdos-Renyi Random Networks, Suwakan Piankoranee Jan 2018

Effect Of Local Rewiring In Adaptive Epidemic Erdos-Renyi Random Networks, Suwakan Piankoranee

Chulalongkorn University Theses and Dissertations (Chula ETD)

Adaptive epidemic network is driven by two main processes, (1) infectionrecovery process that changes the states of the nodes, and (2) rewiring process that modifies the topology of the network. In the past two decades, epidemic models on adaptive networks have gained interests because understanding the dynamics between these two processes can be key to improving control of diseases. However, in most of these models, the rewiring mechanism is based on information known globally, i.e., everyone knows the health status of all others in the network. This concept is not practical in real life for large network. This dissertation aims …

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Effects Of Aldosterone On Striatin And Caveolin-1 Protein Levels In Rat Kidney: Role Of Mineralocorticoid Receptor, Kevalin Inthachart Jan 2018

Effects Of Aldosterone On Striatin And Caveolin-1 Protein Levels In Rat Kidney: Role Of Mineralocorticoid Receptor, Kevalin Inthachart

Chulalongkorn University Theses and Dissertations (Chula ETD)

The mineralocorticoid hormone aldosterone is a steroid hormone which plays an important role in maintenance of sodium, potassium, and acid-base balance. Aldosterone actions are mediated by mineralocorticoid receptor (MR) that could operate via genomic or nongenomic pathways. It has been shown that MR forms a complex with several molecules including scaffolding proteins, such as striatin and caveolin-1 (cav-1). Previous in vitro studies demonstrated that aldosterone increased striatin and cav-1 protein abundance. In addition, both striatin and cav-1 could interact with MR. However, there is no in vivo study of aldosterone effects on striatin and cav-1 protein levels in rat kidney. …

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Involvement Of Nucleus Raphe Magnus In Neuronal Excitability Of Long Term Paracetamol-Treated Rats, Prangtip Potewiratnanond Jan 2018

Involvement Of Nucleus Raphe Magnus In Neuronal Excitability Of Long Term Paracetamol-Treated Rats, Prangtip Potewiratnanond

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study examined an involvement of nucleus raphe magnus (NRM) on neuronal excitability at cortex and trigeminal nucleus caudalis (TNC) of chronic paracetamol-treated rats. Male Wistar rats were separated into two main groups. The rats in paracetamol-treated group were intraperitoneally injected with 200 mg/kg paracetamol while 0.9% NaCl was injected in control rats for 30 days. In the first experiment, cortical spreading depression (CSD) event was initiated and direct current (DC) shift was recorded for 2 hours. Thirty minutes after CSD induction, the rats were injected with glutamate, muscimol or saline at NRM and continued signal recording. In the second …

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Novel (Cu-Sn) And (Ni-Sn) Catalysts Prepared By Mechanical Alloying, Sakollapath Pithakratanayothin Jan 2018

Novel (Cu-Sn) And (Ni-Sn) Catalysts Prepared By Mechanical Alloying, Sakollapath Pithakratanayothin

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research was aimed to synthesize intermetallic catalysts using mechanical alloying (Ma) technique. Copper (Cu) and nickel (Ni) were chosen to study since not only their properties are closed to the noble metal properties, e.g. platinum and palladium, but also they are not expensive. However, as also found in noble metals, both Cu and Ni metals are oxidized easily in air. To overcome this problem, either Cu or Ni was mixed with tin (Sn) to obtain bimetallics, viz. CuSn or NiSn, respectively. Therefore, this research was focused on finding the optimal conditions to synthesize both CuSn and NiSn bimetallics using …

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Light Responsive With Metallo-, And Hydrogen Bonded Benzoxazine Dimer-Based Supramolecular Structure, Sorapat Niyomsin Jan 2018

Light Responsive With Metallo-, And Hydrogen Bonded Benzoxazine Dimer-Based Supramolecular Structure, Sorapat Niyomsin

Chulalongkorn University Theses and Dissertations (Chula ETD)

The present work focuses on multi-responsive molecule based on supramolecular chemistry of benzoxazine dimer as a benzoxazine supramolecular crosslinker, fluorescent labelling benzoxazine conjugated with rotaxane system and benzoxazine pendant group block copolymer. The use of azobenzene derivatives in benzoxazine synthesis provides light responsive behaviour. The remained hydroxyl group from aminoalcohol allows benzoxazine to conjugate with desired functional group. The dihydroxyl benzoxazine acts as molecular crosslinker for poly(acrylic acid) by conjugation. The ring-opening reaction brings benzoxazine dimeric unit on the crosslinker which also showed metal ion complexation. The complexation strengthens the cross-linked polymer network. The complex can reversely form by treating …

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Development Of Composite Polyelectrolyte Complex Membrane For Cationic Dye And Heavy Metal Sorption, Wanwanut Chueasupcharoen Jan 2018

Development Of Composite Polyelectrolyte Complex Membrane For Cationic Dye And Heavy Metal Sorption, Wanwanut Chueasupcharoen

Chulalongkorn University Theses and Dissertations (Chula ETD)

The sorption process is most useful in water treatment because it provides high sorption efficiency, low cost and rapid method. Polyelectrolyte complex (PECs) is a novel polymeric membrane prepared by mixing between oppositely charged polyelectrolyte solution of PDADMAC and PSS. Activated carbon (ACs) is used to improved adsorption efficiency in PECs. Non-stoichiometric PDADMAC/PSS membrane were prepared by mixing excess PSS concentration to get the negative charges on the membrane surface. Sorption efficiency was evaluated by methylene blue, cationic dye and heavy metal ions based on the same material, the difference sorption mechanism were observe. In the cationic dye, the adsorption …

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Thermomechanical Behavior And Chemical Sensing Cationic Poly(Diallyldimethylammonium Chloride) And Anionic Poly(Sodium 4-Styrene Sulfonate) Assembled Into Composite Polyelectrolyte Multilayer Thin Films And Complex Membranes, Rateeya Saikaew Jan 2018

Thermomechanical Behavior And Chemical Sensing Cationic Poly(Diallyldimethylammonium Chloride) And Anionic Poly(Sodium 4-Styrene Sulfonate) Assembled Into Composite Polyelectrolyte Multilayer Thin Films And Complex Membranes, Rateeya Saikaew

Chulalongkorn University Theses and Dissertations (Chula ETD)

Polyelectrolyte composite membranes of cationic PDADMAC and anionic PSS assembled into polyelectrolyte multilayer (PEM) thin film and polyelectrolyte complex (PEC) membranes were used as matrix embedded with several additive molecules. Nano-scale PEM films fabricated using the layer-by-layer deposition method and the loading and release of a hydrophobic model drug curcumin (Cur) was studied for drug delivery and sensing applications. Interestingly, it was found that the loading and release of Cur could be triggered by solvent composition and temperature. In a parallel study, the alternative to the nanoscale PEM was studied in the form of PEC, which were used as stand-alone …

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Effect Of Methyl Formate-Methyl Acetate Treatment On Flexural Strength Between Denture Base And Self-Cured Hard Reline Materials, Mongkol Puangpetch Jan 2018

Effect Of Methyl Formate-Methyl Acetate Treatment On Flexural Strength Between Denture Base And Self-Cured Hard Reline Materials, Mongkol Puangpetch

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of this study was to evaluate the effect of methyl formate-methyl acetate (MF-MA) surface treatment on the flexural strength between denture base and hard reline materials. 180 heat-cured acrylic denture base (Meliodent®) specimens were prepared according to ISO 20795-1 (2013) and divided into 18 groups with various autopolymerizing hard reline materials. Group I-III: relined with Unifast Trad®, Group IV-VI: relined with Kooliner® Group VII-IX: relined with Tokuyama® Rebase II Fast (without adhesive, with hardener), Group X-XII: relined with Tokuyama® Rebase II Fast (with adhesive and hardener), Group XIII-XV: relined with Tokuyama® Rebase II Fast (without adhesive and hardener), …

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Effect Of Citric Acid On Color Stability And Surface Roughness Of Translucent Monolithic Zirconia With Different Staining Techniques, Panisa Rinthong Jan 2018

Effect Of Citric Acid On Color Stability And Surface Roughness Of Translucent Monolithic Zirconia With Different Staining Techniques, Panisa Rinthong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background and rationale: Translucent monolithic zirconia is developed to solve the problem of esthetic in the conventional generation of zirconia with high opacity. When these materials are used for anterior restoration in the oral cavity, they can contact with foods and beverages that are acidic, which may affect the color stability and surface roughness of the material at different levels. Objective: The objective of this study was to determine the effects of citric acid on color stability and surface roughness of translucent monolithic zirconia with different staining techniques. Materials and Methods: A total of 80 disc specimens of VITA YZ® …

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Effect Of Various Curing Conditions In Pressure Cooker On Flexural Strength Of Denture Hard Relining Materials, Thassanee Suwannachote Jan 2018

Effect Of Various Curing Conditions In Pressure Cooker On Flexural Strength Of Denture Hard Relining Materials, Thassanee Suwannachote

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluated the effect of various curing conditions in pressure cooker on flexural strength of hard chairside reline resins (UnifastTM Trad, Tokuyama® Rebase II Fast with and without Hardener®). For each material, 70 specimens were prepared and divided into 7 groups consists of control group and 6 experimental groups: cured in 2 bars air or nitrogen pressure cooker at 55ºC for 10, 15 and 20 min respectively. For Hardener® groups, specimens were soaked in Hardener® for 3 min after curing. The flexural strength was tested using a Universal testing machine. The data were analyzed using Three-way ANOVA, One-way ANOVA …

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Parent Vaccine Hesitancy On Their Children Measles Rubella (Mr) Vaccination Of Urban Area In Indonesia, Ardyansyah Arthin Jan 2018

Parent Vaccine Hesitancy On Their Children Measles Rubella (Mr) Vaccination Of Urban Area In Indonesia, Ardyansyah Arthin

Chulalongkorn University Theses and Dissertations (Chula ETD)

introduction: Although vaccine has been one of the biggest achievements in public health, number of people who still question the benefit of vaccine gets bigger each year. It happens all over the globe, including Indonesia. The reason of this hesitancy toward vaccination is different from each region and as the result, it makes people either completely accepted it, accept but not sure to completely refuse the vaccine. This research is held to see the vaccination status toward MR vaccine. Methodology: A cross-sectional study carried out in Makassar city, Indonesia from March-May 2019 using online self-administered questionnaire. Snowball sampling technique was …

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Knowledge, Attitude And Health Care Practices For Gender-Based Violence Cases In Yangon, Myanmar, Aye Nyein Ei Jan 2018

Knowledge, Attitude And Health Care Practices For Gender-Based Violence Cases In Yangon, Myanmar, Aye Nyein Ei

Chulalongkorn University Theses and Dissertations (Chula ETD)

Gender-based violence has negative impact on physical, psychological and social wellbeing of the survivor. The initial response can lessen the magnitude of the effect and thus the health care sector's readiness to response GBV cases is important. Hence, a study to explore the knowledge, attitude and practice level regarding GBV response among health care personnel was conducted. A cross-sectional study was conducted in 48 public hospitals in Yangon, Myanmar during April and May 2019 involving 398 health care personnel (doctors and nurses). The measurement tool is self-administered structured questionnaires for demographic assessment, knowledge, attitude, supportive environmental factors and practice. Analysis …

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