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2018

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Metalloporphyrin-Sensitized Titania/Silica/Iron Oxide Nanocomposites And Their Photocatalytic Activities, Padtaraporn Chanhom Jan 2018

Metalloporphyrin-Sensitized Titania/Silica/Iron Oxide Nanocomposites And Their Photocatalytic Activities, Padtaraporn Chanhom

Chulalongkorn University Theses and Dissertations (Chula ETD)

New nanomaterials of the magnetic visible light active photocatalysts, tetra(4-carboxyphenyl)porphyrin (TCPP) with different metals [Mn(II), Fe(III), Cu(II), Zn(II) and metal-free] in the center adsorbed on titania-silica-iron oxide superparamagnetic composites (TSI) were synthesized successfully. The photocatalytic activities in methylene blue (MB) degradation were determined under incandescent lamp for 3 h. Their characteristics have been identified using UV-visible spectroscopy, X-ray diffractometry (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The photodegradation results revealed that the metalloporphyrin sensitization helped TSI to absorb the light in visible region. Titania-silica-iron oxide nanomaterials with copper(II) tetra(4-carboxyphenyl)porphyrin (CuTCPP) can significantly …

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Fluorescent Sensors From Salicylaldimine Derivatives For Metal Ions, Phoom Sangsuwan Jan 2018

Fluorescent Sensors From Salicylaldimine Derivatives For Metal Ions, Phoom Sangsuwan

Chulalongkorn University Theses and Dissertations (Chula ETD)

An in-situ forming and sensing was developed as a high-throughput screening of fluorescent chemosensors for metal ions. The 45 salicylaldimines, formed in-situ from the condensation between 5 salicylaldehydes and 9 amines, in 96 well-plates were photographed under black light along with the 5 salicylaldehydes in the absence and presence of 18 metal ions. The library of fluorescence response images of these 50 chemosensors were processed into RGB values. The PCA of theΔRGB, the differences between those of images with and without the metal ions, showed 9 sensors with normalized loading value over 70%. The sensor array constructed from these 9 …

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Detection Of Sulfonamide Residues By Paper Spray Mass Spectrometry, Surased Suraritdechachai Jan 2018

Detection Of Sulfonamide Residues By Paper Spray Mass Spectrometry, Surased Suraritdechachai

Chulalongkorn University Theses and Dissertations (Chula ETD)

Sulfonamide antibiotics are commonly used veterinary drugs in livestock to prevent or treat infectious diseases. Their residues in food are of concern since they can cause adverse health effects and development of bacterial resistance. In this work, a practical method for detection and quantification of sulfamethazine, one of sulfonamide antibiotics, in pig body fluid samples is developed via the combination of simple extraction and paper spray mass spectrometry. The method required minimal sample preparation and low analysis time while providing high sensitivity and accuracies in pig whole blood (LOD = 10.1 ng/mL, %recovery = 95.4-104.1%), pig serum (LOD = 4.6 …

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Synthesis Of Halogenated Flavonoids As Anti-Dengue Agents, Thao Huynh Nguyen Thanh Jan 2018

Synthesis Of Halogenated Flavonoids As Anti-Dengue Agents, Thao Huynh Nguyen Thanh

Chulalongkorn University Theses and Dissertations (Chula ETD)

Flavonoids have been recognized as promising compounds with various bioactivities. Certain flavonoid derivatives exhibited more potent activities than their parent compounds. Recently, halogenated flavonoids have been addressed for their anti-dengue activity. In this research, a series of twenty-two brominated and iodinated flavonoid derivatives were synthesized and explored for dengue infection inhibition. Seventeen derivatives have been investigated for the first time. 8-Bromobaicalein, 6,8-dibromopinocembrin, 6,8-dibromopinostrobin, 6,8-diiodopinostrobin were disclosed as effective and non-toxic anti-dengue agents. These compounds displayed remarkably low EC50 as well as high CC50, which could be considered as potent therapeutic agents. Moreover, the preliminary screening on brominated O7-ether chrysins discovered …

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Green Synthesis Of Gold Nanoparticles Using Natal Lily Crinum Moorei Extract And Biological Activities, Warinda Marujiwat Jan 2018

Green Synthesis Of Gold Nanoparticles Using Natal Lily Crinum Moorei Extract And Biological Activities, Warinda Marujiwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Crinum moorei as medical herb has different pharmacological activities such as anti-cancer and anti-inflammatory properties. Gold nanoparticle (AuNP) is an interesting anti-cancer drug carrier which can solve anti-cancer drug's problems with good biocompatibility, non-toxicity and suitable size for the intracellular uptake to treat to the target cells. From the beginning, other reducing agents were used to synthesize AuNPs. However, they lead to the contamination of chemicals on AuNP's surfaces which limits the medical application or long process and time consuming. Therefore, plant extracts were studied to make a remarkable dual function: the synthesized AuNPs agent and drug agent. In this …

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Synthesis And Antidiabetic Activity Of Furofuran Lignans Containing Multiphenolic Groups, Titiruetai Doungwichitrkul Jan 2018

Synthesis And Antidiabetic Activity Of Furofuran Lignans Containing Multiphenolic Groups, Titiruetai Doungwichitrkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Synthesis of furofuran lignans containing multiphenolic groups (6-12) was carried out. The starting material samin (5) was obtained by acid hydrolysis of sesamin (2), which was isolated from sesame seed oil. A series of target lignans were synthesized from samin (5) and a varity of phenolics through Friedel-Crafts reaction, yielding desired products (6). To increase number of hydroxy moieties on the synthesized lignans, oxidative reaction using lead (IV) tetraacetate was performed. Removal of methylenedioxy of furofuran lignans containing a phenolic moiety produced unexpected products which contains para-quinone together with ortho-dihydroxy moieties on furofuran core structures (8-9). Consequently, to avoid oxidation …

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The Effect Of Nac And Carnosine On Alzheimer’S Disease-Related In Vitro Model Through Rage-Age Signaling Pathway, Suphasarang Sirirattanakul Jan 2018

The Effect Of Nac And Carnosine On Alzheimer’S Disease-Related In Vitro Model Through Rage-Age Signaling Pathway, Suphasarang Sirirattanakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Alzheimer’s disease (AD) is the most common dementia which found increasing with age. It involves neurodegeneration which leads to various abnormalities especially memory loss, inability to learn new things, lack of creativity, lack of decision making ability, lack of critical thinking, calculation inability, inability to live normal daily life, inability to recognize person, time and place, emotional disturbance, and difficulty to use language. Since AD has severe impact in various aspects on both the patients and their families, so we are interested to study the neurodegenerative mechanism when neuronal cells are under oxidative stress which will induce neuroinflammation through the …

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Effect Of Ercc1, Xrcc1 And Gstp1 Polymorphisms On Clinical Response And Adverse Events Of Platinum-Based Chemotherapy In Epithelial Ovarian Cancer Patients, Salisa Liblab Jan 2018

Effect Of Ercc1, Xrcc1 And Gstp1 Polymorphisms On Clinical Response And Adverse Events Of Platinum-Based Chemotherapy In Epithelial Ovarian Cancer Patients, Salisa Liblab

Chulalongkorn University Theses and Dissertations (Chula ETD)

Platinum-based chemotherapy is the first line chemotherapy regimen for epithelial ovarian cancer (EOC). Pharmacogenomics is one factor that might affect its efficacy and toxicity. This cohort study was aimed to investigate the association between ERCC1, XRCC1 and GSTP1 polymorphisms on clinical responses and adverse events related to platinum-based chemotherapy in Thai EOC patients. Fifty-two patients with advanced EOC were enrolled in this cohort study. The mean age was 55.7 years old. Genotyping analysis of ERCC1 (C>A, rs3212986), XRCC1 (A>G, rs25487) and GSTP (A>G, rs1695) were performed which allele frequencies were found at 35.6%, 28.9% and 10.6%, respectively. …

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Neurodevelopmental And Neurobehavioral Outcomes In Early Antiretroviral Treated Young Children With Perinatally-Acquired Hiv Infection (Phiv) Compared To Age-Matched Perinatally Hiv-Exposed Uninfected Children (Pheu), Watsamon Jantarabenjakul Jan 2018

Neurodevelopmental And Neurobehavioral Outcomes In Early Antiretroviral Treated Young Children With Perinatally-Acquired Hiv Infection (Phiv) Compared To Age-Matched Perinatally Hiv-Exposed Uninfected Children (Pheu), Watsamon Jantarabenjakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Introduction: Although early initiation of antiretroviral therapy (ART) in perinatally HIV infected (PHIV) infants significantly reduces morbidity and mortality, neurodevelopmental and neurobehavioral problems are still issues of concern. Objectives: This study aims primarily to compare neurodevelopmental outcomes and neurobehavioral outcomes between PHIV children who initiated ART within 12 months of life and perinatally HIV-exposed uninfected (PHEU) children. The secondary aims are to assess the outcomes by timing of ART initiation and to delineate factors and predictors associated with neurodevelopmental and neurobehavioral outcomes. Methods: This study was a prospective observational study which enrolled PHIV and PHEU children aged 12-56 months. Neurodevelopmental …

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A Deep Relation Extraction From Biomedical Texts With Attention Mechanisms And Domain-Specific Contextual Representations, Amarin Jettakul Jan 2018

A Deep Relation Extraction From Biomedical Texts With Attention Mechanisms And Domain-Specific Contextual Representations, Amarin Jettakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

The biomedical relation extraction (RE) tasks aim to study the interaction between pre-defined entities from biomedical literature: Bacteria Biotope (BB) and Drug-Drug interactions (DDI) tasks. Some previous investigations have used feature-based models; others have presented deep-learning-based models such as convolutional and recurrent neural networks used with the shortest dependency paths (SDPs). Although SDPs contain valuable and concise information, sections of significant information necessary to define bacterial location relationships are often neglected. In addition, the traditional word embedding used in previous studies may suffer from word ambiguation across linguistic contexts. Here, we present a deep learning model for biomedical RE. The …

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A Hotel Hybrid Recommendation Method Based On Context-Driven Using Latent Dirichlet Allocation, Weraphat Nimchaiyanan Jan 2018

A Hotel Hybrid Recommendation Method Based On Context-Driven Using Latent Dirichlet Allocation, Weraphat Nimchaiyanan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Recommender systems play an important role in helping users find items that they want. Normally, ratings are used in content-based filtering (CBF) and collaborative filtering (CF) for recommendation. However, only ratings are not enough for recommendation. Thus, contextual information, context driven and Latent Dirichlet Allocation (LDA) are used to improve recommendation. Also, the context of individual user has changed in the timeline (context-driven). In this work, a hotel hybrid recommendation method (CF+CBF) based on context-driven using LDA is proposed. Firstly, we find missing user ratings of user-hotel rating matrix by applying LDA on user ratings in order to get predicted …

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Development Of Graphene Oxide/Silver Nanocomposite Coating On Niti Alloy For Biomedical Applications, Dinesh Rokaya Jan 2018

Development Of Graphene Oxide/Silver Nanocomposite Coating On Niti Alloy For Biomedical Applications, Dinesh Rokaya

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study aimed to evaluate the surface, mechanical, and biological properties of graphene oxide/silver nanocomposite (GO/Ag) coated NiTi alloy. Substrates were coated using the electrophoretic deposition at 30 V for 1, 5, and 10 min, and were characterized by scanning electron microscope, Raman spectroscopy, energy dispersive spectroscopy, surface profilometer, and atomic fluoroscope force microscopy (AFM). Hardness, modulus of elasticity, and friction were done and surface adhesion was measured from AFM. Biocompatibility testing was done on human gingival fibroblasts using 3-[4,5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide (MTT) assay. Data were analyzed using SPSS 16; One-way ANOVA with post hoc Scheffe Test (P = 0.05). …

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Using N-Alkane As A Proxy To Reconstruct Paleoenvironment In Thale Noi, Phatthalung Province, Assuma Sainakum Jan 2018

Using N-Alkane As A Proxy To Reconstruct Paleoenvironment In Thale Noi, Phatthalung Province, Assuma Sainakum

Chulalongkorn University Theses and Dissertations (Chula ETD)

Normal alkane (n-alkane) is the widely used hydrocarbon proxy for the paleoenvironmental study because of their specific characteristic and resistance to microbial degradation. The n-alkanes from the sediment cores TLN-CP5 and TLN-CP7 from Thale Noi, Phatthalung Province, were analyzed and subsequently compared with those derived from the recent plant samples. The plant samples were taken from mangrove forests, i.e. true mangrove, back mangrove, and mangrove associate, based on the previous study on pollen analysis. The n-alkane distributions, the average chain length (ACL), the carbon preference index (CPI) and the proportion of aquatic components (Paq) were further analyzed in order to …

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Lithological Classification By Deep Learning Algorithm, Worapop Thongsame Jan 2018

Lithological Classification By Deep Learning Algorithm, Worapop Thongsame

Chulalongkorn University Theses and Dissertations (Chula ETD)

Six machine learning algorithms are used to classify subsurface rocks based on fifteen well logging features from four geothermal wells in the Snake River Plain, Idaho, USA. Two experimental designs, single- and multiple-well tests, are developed to determine the most optimal model and hyperparameters. The single-well test randomly assigns the data in each well into 70% for training set, 10% for validation set, and 20% for test set. The multiple-well test combines data from three wells and splits the data in the fourth well into 70% for training set, 10% for validation set, and 20% for test set. Results show …

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Effects Of Blood Contamination On Chemical Composition And Ion Releasing Of Calcium Silicate-Based Materials, Nareerat Thanavibu Jan 2018

Effects Of Blood Contamination On Chemical Composition And Ion Releasing Of Calcium Silicate-Based Materials, Nareerat Thanavibu

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study assessed the effects of blood contamination on the chemical composition and ion release of calcium silicate-based materials. ProRoot MTA (WMTA), Biodentine and TotalFill BC RRM putty (TRRM) were investigated. Materials were exposed to blood (blood-contaminated condition) or normal saline (non-blood-contaminated condition) for 24 hours. Three samples of each group were analysed for chemical composition using X-ray diffractometer and an energy-dispersive X-ray spectoscope with a scanning electron microscope after immersed in phosphate-buffered saline for 1, 7, 14 and 28 days. Five samples of each group were used to measure pH and ion release using a pH meter and inductively …

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Effectiveness Of Different Root Canal Disinfection Protocols On The Reduction Of Bacteria In Large Root Canals, Parnwad Sasanakul Jan 2018

Effectiveness Of Different Root Canal Disinfection Protocols On The Reduction Of Bacteria In Large Root Canals, Parnwad Sasanakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Introduction: The aims of this study were to evaluate the effectiveness of disinfection methods and determine the most promising irrigation protocol for regenerative endodontics in teeth with large root canals. Methods: Sterilized root samples with 0.8-mm wide apical foramen (n=94) were prepared from human mandibular premolars. Ninety-two samples were infected with E. faecalis for 21 days and biofilm formation was verified using scanning electron microscopy (n=2). The 90 infected samples were randomly assigned into 9 groups: no intervention (initial), 1.5% NaOCl irrigation (1.5N), 2.5% NaOCl irrigation (2.5N), 1.5N + intermittent passive ultrasonic irrigation (PUI), 1.5N + intermittent canal brushing with …

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Predictive Survivability Model Of Technological Start-Ups: A Case Study Of Smart Parking, Akshay Nirmal Singh Jan 2018

Predictive Survivability Model Of Technological Start-Ups: A Case Study Of Smart Parking, Akshay Nirmal Singh

Chulalongkorn University Theses and Dissertations (Chula ETD)

The dissertation focuses on analysing pre-existing survivability prediction models that can be applied to new businesses and start-ups. After studying certain popular models and their critical success factors that can be found in successful businesses and are lacking in failed businesses a new prediction model for technological companies will be crafted. Furthermore, a case study of a potential technological start-up company called Smart Parking will be internally and externally analysed with regards to the environment in will be operating in. The analyses of the internal and external environments will help plan and come up with business strategies for Smart Parking. …

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An Investigation Of Beliefs And Classroom Asssessment Practices Of English Teachers In Primary Schools In Thailand, Arthitaya Narathakoon Jan 2018

An Investigation Of Beliefs And Classroom Asssessment Practices Of English Teachers In Primary Schools In Thailand, Arthitaya Narathakoon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of the present study is to investigate 1) the teachers' beliefs about classroom assessment in English classes, 2) their actual classroom practices, and 3) the extent to which their beliefs are congruent with their actual assessment practices. The participants were grade-6 English teachers in a school district from the northeastern part of Thailand. The study was conducted using a mix-methods approach. There were two phases. Phase 1 involved the administration of a questionnaire to 97 teachers. It aimed to gather data on the classroom assessment beliefs and practices of teachers in Thai primary schools. Phase 2 was comprised …

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Traditional Ecological Knowledge Of Indigenous Peoples On Climate Change Adaptation : A Case Study Of Sea Nomads “Orang Suku Laut”, Lingga Regency, Riau Islands Province, Indonesia, Wengki Ariando Jan 2018

Traditional Ecological Knowledge Of Indigenous Peoples On Climate Change Adaptation : A Case Study Of Sea Nomads “Orang Suku Laut”, Lingga Regency, Riau Islands Province, Indonesia, Wengki Ariando

Chulalongkorn University Theses and Dissertations (Chula ETD)

At the international community, Traditional Ecological Knowledge (TEKs) have been recognized and acknowledged the important roles of indigenous peoples to tackle climate change. The cultural practice, cultural belief and adaptive capacity in managing nature by the Orang Suku Laut (OSL), Indonesian indigenous group who are living as nomads in the sea, would be considered as the key drivers to achieve the effectiveness of climate change adaptation (CCA). This research aimed to study the TEKs of indigenous peoples on CCA of the OSL, Lingga Regency, Riau Islands Province, Indonesia, for appropriate CCA policy implemented at their communities. Data collection was obtained …

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Local Knowledge Framework For Sustainable Utilization Of Mangrove Forest : A Case Study Of Klong Khone Sub-District, Mueang District, Samut Songkhram Province, Thailand, Wipapan Adulcharoen Jan 2018

Local Knowledge Framework For Sustainable Utilization Of Mangrove Forest : A Case Study Of Klong Khone Sub-District, Mueang District, Samut Songkhram Province, Thailand, Wipapan Adulcharoen

Chulalongkorn University Theses and Dissertations (Chula ETD)

A development of local knowledge or local knowledge life cycle for locally appropriate sustainable utilization of mangrove ecosystem services was influenced by factors that were specific to ecological and social-cultural conditions and varied relying a change of the targeted mangrove ecosystem services for utilization. This study aims 1) to identify the factors in the local knowledge life cycle during two phases of mangrove stand initiation and young forest regrowth at Klong Khone sub-district, Samut Songkhram province, Thailand and 2) to propose the local knowledge framework for the sustainable utilization of mangrove ecosystem services and lessons learned through the local knowledge …

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Tio2 Nanoparticles Coated Forward Osmosis Membranes For Treatment Of Industrial Textile Effluent, Kaung Ko Ko Sint Jan 2018

Tio2 Nanoparticles Coated Forward Osmosis Membranes For Treatment Of Industrial Textile Effluent, Kaung Ko Ko Sint

Chulalongkorn University Theses and Dissertations (Chula ETD)

Textile wastewater occur as demanding water bodies to be treated by membrane separation due to the complex composition and presence of reactive constituents such as heavy metals and salts as well as nutrients, e.g. nitrogen, sulphate and phosphate. Numerous combination of osmosis process with photocatalysts has been experimentally conceived for the water and wastewater treatment and reuse of textile wastewater. The present work was devoted to study the operating feasibility using photocatalyst as TiO2 nano-particles were coated onto two commercially available FO membranes, a cellulose triacetate (CTA) membrane and an aquaporin (AqP) membrane through a specially designed 3-(trimethoxysilyl) propyl methacrylate–polymethyl …

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Adsorption And Chemical Cleaning Process Of Anionic And Non-Ionic Surfactants On The Membrane Surface Through The Forward Osmosis Process: Application For Water Reuse, Kaiwit Ruengruehan Jan 2018

Adsorption And Chemical Cleaning Process Of Anionic And Non-Ionic Surfactants On The Membrane Surface Through The Forward Osmosis Process: Application For Water Reuse, Kaiwit Ruengruehan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Forward osmosis (FO) process, an attractive membrane technologies, have been widely studied and applied in many fields to manufacture the clean water. This work, we focused on the fouling behavior and mechanisms of forward osmosis (FO) fouled by sodium dodecyl sulfate (SDS) as anionic surfactants and of nonylphenol ethoxylate (NPE, NP-40) as nonionic surfactant, including cleaning process to recover the system. FO process was run under different operating conditions (cross flow velocity, pH of feed solution, surfactant concentration). In addition, deionized-water (DI), 0.1 M NaCl, and alkaline solution (NaOH) were applied as agents for the cleaning process. The results revealed …

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Roles And Regulation Of The Ai-2 Quorum Sensing Of Vibrio Parahaemolyticus In Nitrification Biofilter Of Shrimp Recirculating System., Monchai Pumkaew Jan 2018

Roles And Regulation Of The Ai-2 Quorum Sensing Of Vibrio Parahaemolyticus In Nitrification Biofilter Of Shrimp Recirculating System., Monchai Pumkaew

Chulalongkorn University Theses and Dissertations (Chula ETD)

Thailand is the largest shrimp producing and exporter among Southeast Asia. Up-to-Date, Recirculating Aquaculture System (RAS) have been developed in order to control water quality and enable to conduct intensive cultivation without limitation of land-based cultivation method. Nevertheless, there is concern about pathogenic contamination in Biofilter. Therefore, the role of biofilter in terms of biosecurity is required to study. Recently, shrimp Early Mortality Syndrome (EMS) as known as AHPND/EMS, has spread to shrimp farm in several areas of Thailand. This contributes to severe productivity losses in the shrimp farm industry. It is evident that the causative agent of AHPND disease …

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Effect Of Operating Conditions On Color And Anions Removal From Textile Industrial Effluent Using Membrane Distillation System, Pyae Phyo Kywe Jan 2018

Effect Of Operating Conditions On Color And Anions Removal From Textile Industrial Effluent Using Membrane Distillation System, Pyae Phyo Kywe

Chulalongkorn University Theses and Dissertations (Chula ETD)

One of the main pollution from textile wastewater is the dyeing wastewater containing color and organic matters. To develop wastewater treatment systems and to reuse the water are still challenged because of the scarcity of water in the world. Among the treatment methods of textile wastewater, membrane distillation was used as the concept of this research. The focus points of the direct contact membrane distillation system are the membrane characteristics, operating parameters (temperature and flow rate) and treatment efficiency. The synthetic dye wastewater (reactive black-5 and reactive blue-19) and real textile effluent were used as the feed wastewater. In this …

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Acclimatization And Application Of Biofilters For Nitrogen Removal In Marine Recirculating Shrimp Culture System, Penpicha Satanwat Jan 2018

Acclimatization And Application Of Biofilters For Nitrogen Removal In Marine Recirculating Shrimp Culture System, Penpicha Satanwat

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research involved in the complete nitrogen removal in marine recirculating aquaculture system (RAS) through sequential nitrification and denitrification processes using internal biofilter within a single tank. The study was divided into two experimental parts. The first study was to estimate the effects of salinity (5, 15 and 25 PSU) and stocking density (50 and 100 shrimp m-2) on nitrification and denitrification efficiencies, as well as on microbial diversity in the biofilm. Also, the nitrogen removal efficiencies of fibrous BiocordTM biofilter and Japanese filter mat were compared. Results showed that the nitrification was stimulated in low-salinity (5 PSU) system with …

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Heavy Metals Adsorption In Simulated Groundwater Using Iron Oxide Particles And Iron Oxide Coated Sand, Ramy Lun Jan 2018

Heavy Metals Adsorption In Simulated Groundwater Using Iron Oxide Particles And Iron Oxide Coated Sand, Ramy Lun

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to understand adsorption mechanisms of single of heavy metals such as Mn, As and Fe and a combined heavy metal in simulated groundwater using iron oxide particles (IOP) and iron oxide coated sands (IOCS). The experiment was conducted in batch test. In order to understand mechanism of heavy metals adsorption, pseudo first-order and pseudo second-order of kinetic, and Langmuir and Freundlich isotherm models were applied by varying adsorbent dosages from 4 to 24 mg/L ,and 10 to 60 min of times. Optimal dosages for single heavy metals and a combined heavy metal removal were 12, 12, 20 …

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System Dynamics Analysis On Municipal Solid Waste Management Under Flooding : Case Study Bangkok, Thailand, Nuchcha Phonphoton Jan 2018

System Dynamics Analysis On Municipal Solid Waste Management Under Flooding : Case Study Bangkok, Thailand, Nuchcha Phonphoton

Chulalongkorn University Theses and Dissertations (Chula ETD)

The municipal solid waste management service system has been one of the key service provisions to indicate the sustainability of the city as defined in Sustainable Development Goals - SDGs #11. Complex linkages of stock and flow within the system are impacted by waste quantities and spatial characteristics. The complex characteristics make it difficult to design a sustainable management system, particularly in case of a disaster. Flooding is a major natural disaster in many regions of the world and poses a challenge as an external disturbance that can affect any part of the waste management system. Flood mitigation plans are …

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Comparison Of The Accuracy Between Digital And Conventional Impression In Different Multiple Implant Angles At Posterior Mandibular Region Using Innovation 3d Super Imposition Software Program; In Vitro Study, Arisa Hongsopa Jan 2018

Comparison Of The Accuracy Between Digital And Conventional Impression In Different Multiple Implant Angles At Posterior Mandibular Region Using Innovation 3d Super Imposition Software Program; In Vitro Study, Arisa Hongsopa

Chulalongkorn University Theses and Dissertations (Chula ETD)

Statement of problem: This study aims to compare the accuracy of three-dimensional changes in position and angulation between digital and conventional impression techniques in different angulated implants at the mandibular partial edentulous area with the use of a mandibular partial edentulous reference model with 4 dental implants in different angulations (15 degrees buccally,lingually, mesially, and distally). Conventional and digital impression techniques were used for master model and fabricated 15 conventional master casts and 15 three dimensional printing models. Each scan body was connected with implant or analog to transfer implant positions. All of the master model, master casts, and printing …

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Ecological Impacts Of Fishing Gears In Ko Chang, Trat Province, Thailand, Wichin Suebpala Jan 2018

Ecological Impacts Of Fishing Gears In Ko Chang, Trat Province, Thailand, Wichin Suebpala

Chulalongkorn University Theses and Dissertations (Chula ETD)

Knowledge of ecological impacts of fishing, especially in small-scale sector, is not always readily available, making it difficult to employ an ecosystem-based approach to fisheries management and to achieve sustainability. The topic of this dissertation was formulated with the aim to enhance this knowledge through conducting researches in Mu Ko Chang, Trat Province, the Eastern Gulf of Thailand. This study focuses on two main types of impacts, i.e. bycatch and habitat damages, consisting of three research modules: 1) assessing existing knowledge and analyzing the knowledge gap regarding bycatch and habitat impacts of fishing methods in Thai waters; 2) investigating fishing …

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Comparison Of Three Dimensional Accuracy For Surgical Guided Template Fabrication Using Two Different Implant Planning Software Programs, Natchaya Thitaphanich Jan 2018

Comparison Of Three Dimensional Accuracy For Surgical Guided Template Fabrication Using Two Different Implant Planning Software Programs, Natchaya Thitaphanich

Chulalongkorn University Theses and Dissertations (Chula ETD)

Statement of problem: Static computer-assisted implantation system (s-CAIS) has been introduced to implant dentistry for decades. According to previous studies, they were recognised the inaccuracies of actual implant position placed via using static computer-assisted implantation system. These inaccuracies result from an accumulation of every step in the workflow from planning to accuracy assessment. Recently, there are multiple implant planning softwares available. coDiagnostiXTM software and Implant StudioTM software are widely used third-party implant planning softwares which claimed to provide predictable implant placement outcome. However, the effect of softwares used on accuracy of guided surgery in anterior maxilla region has not been …

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