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A Study Of Translation Of Relative Clauses From English Into Thai And From Thai Into English, Nattharath Leenakitti
A Study Of Translation Of Relative Clauses From English Into Thai And From Thai Into English, Nattharath Leenakitti
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study examined translation strategies which were used in translating English relative clauses (ERCs) with the relativizers ‘who,’ ‘which,’ and ‘that’ into Thai and Thai relative clauses (TRCs) with the relativizers ‘/tʰîː/’ and ‘/sɯ̂ŋ/’ into English. In addition, the types of relative clauses, namely restrictive and non-restrictive, in English were investigated for their effects on the translation strategies in the English-Thai translation. The data comprised 714 sentence pairs whose source texts contained relative clauses. English-Thai translation consisted of 348 sentence pairs from two English novels and their Thai translations. With regard to Thai-English translation, the data covered 366 sentence pairs …
An Investigation Of The Quality Of Thai Undergraduate Students’ Peer Feedback, Interaction Patterns, And Written Revisions Through The Incorporation Of Technology, Nutchayaporn Jaritngarm
An Investigation Of The Quality Of Thai Undergraduate Students’ Peer Feedback, Interaction Patterns, And Written Revisions Through The Incorporation Of Technology, Nutchayaporn Jaritngarm
Chulalongkorn University Theses and Dissertations (Chula ETD)
Giving and receiving feedback is an important facet in developing writing. This study aimed to investigate different online interaction patterns during peer feedback activity and to examine how it could lead to students’ writing improvement. The study sample consisted of 30 first-year undergraduate students of Chulalongkorn University who were enrolled in a required foundation English course II. Subjects were classified into three writing proficiency levels using scores from an English writing proficiency test. They were required to use an online platform to provide peer feedback anonymously on two writing assignments. Quantitative and qualitative data were collected from students’ online interactions, …
An Interlanguage Study Of L2 Perception And Production Of English Word Stress By L1 Thai Learners., Sawaros Jaiprasong
An Interlanguage Study Of L2 Perception And Production Of English Word Stress By L1 Thai Learners., Sawaros Jaiprasong
Chulalongkorn University Theses and Dissertations (Chula ETD)
The aim of this study was to investigate L1 Thai learners’ English word stress perception and production of two different groups of English words: English words with different suffixes (suffixes affecting stress shift and neutral suffixes) and compound words (compound nouns and compound verbs). Three objectives were 1) to compare and contrast the perception of English word stress focusing on words, 2) to compare and contrast the production of English word stress focusing on words and 3) to investigate whether there is a relationship between L1 Thai learners’ perception and production of English word stress. Two groups of L1 Thai …
Out-Of-Class Language Learning Strategies Of Thai University Students During Participant In The Summer Work And Travel Program, Thunyaporn Thanasumbun
Out-Of-Class Language Learning Strategies Of Thai University Students During Participant In The Summer Work And Travel Program, Thunyaporn Thanasumbun
Chulalongkorn University Theses and Dissertations (Chula ETD)
It has long believed that in-class instruction alone is not sufficient to promote language skill development of second and foreign language learners, so spending time during school break in a country where the target language is spoken is one way to further increase their language proficiency outside classes. The present study aimed to investigate out-of-class language learning strategies and intercultural competence skills of 353 Thai undergraduate students who participated in the Summer Work and Travel Program in the United States in the year 2018. Quantitative data were collected using the Strategy Inventory for Language Learning (SILL) developed by Oxford (1990) …
An Interlanguage Study Of Lexical Priming And The Acquisition Of English Vocabulary By L1 Thai Learners, Suparuthai It-Ngam
An Interlanguage Study Of Lexical Priming And The Acquisition Of English Vocabulary By L1 Thai Learners, Suparuthai It-Ngam
Chulalongkorn University Theses and Dissertations (Chula ETD)
The present study explored English vocabulary acquisition of L1 Thai learners. The lexical priming, which implies the lexical access, was examined to illustrate the vocabulary acquisition. The organization of the mental lexicon and the lexical processing of Thai learners were examined using the lexical priming experiments. The factors affecting the vocabulary acquisition were also investigated through qualitative approach. The present interlanguage study is a cross-sectional research that compared the English vocabulary acquisition of the learners with different degrees of language exposure. The sample groups were selected by stratified random sampling. They were Thai undergraduates who were living in Thailand. The …
Co-Creating Built Environment For Sustainable Development: A Case Study Of Ban Moh, Mahasarakham Province, Chainun Prompen
Co-Creating Built Environment For Sustainable Development: A Case Study Of Ban Moh, Mahasarakham Province, Chainun Prompen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Co-creation has been used widely in many fields, including innovation design, service design, and district development. In Thailand, many development projects apply co-creation as an approach to development. However, the academic knowledge about co-creating built environment in Thailand is limited and remains unclear. Therefore, this study aims to understand the processes and practices of co-creating built environment in the context of Thailand through the description and analysis of cases. The four case studies described here include the Chantaboon riverfront community in Chantaburi Province, Ban Pred Nai community in Trat Province, Ban Mun Kong project in Samut Prakan Province, and Pru …
Policy For Sustainable Informal Transport - A Case Study Of Feeder Services In Bangkok, Thailand, Chutaporn Amrapala
Policy For Sustainable Informal Transport - A Case Study Of Feeder Services In Bangkok, Thailand, Chutaporn Amrapala
Chulalongkorn University Theses and Dissertations (Chula ETD)
One informal public transport service in Bangkok is Silor (SR), given the meaning in Thai as four-wheeler. SR facilitates urban mobility both in terms of major travel mode and feeder bus and mass transit lines in the city. This research aims to investigate service characteristics and challenges of SR service, identify factors affecting the use and non-use of SR, explore travel behavior and attitudes to determine service delivery gaps in order to propose policy recommendations for the better functioning of SR service. Interviews are conducted through questionnaire survey to collect data from supply side, including drivers and regulators, and demand …
Development Of Flotation Enhanced Stirred Tank (Fest) Process For Petroleum Hydrocarbons Removal From Drill Cuttings, Marina Phea
Development Of Flotation Enhanced Stirred Tank (Fest) Process For Petroleum Hydrocarbons Removal From Drill Cuttings, Marina Phea
Chulalongkorn University Theses and Dissertations (Chula ETD)
This work aims to develop the treatment process for the removal of total petroleum hydrocarbons (TPH) from DC by using the combination of air floatation and stirring processes, called Flotation Enhanced Stirred Tank (FEST). Initially, stirring, induced air flotation (IAF), and dissolved air flotation (DAF) are individually investigated over DC washing. Afterward, the combination process between “stirring-DAF” and “stirring-IAF-DAF” are continuously observed for finding the better conditions of TPH removal efficiency. To optimize the operational terms of the treatment process, the Design of Experiment (DOE) is applied to design the experimental conditions within the central composite design-response surface methodology (CCD-RSM). …
An Analysis Of Momentum Strategy’S Failure In Stock Exchange Of Thailand, Intha Thithapand
An Analysis Of Momentum Strategy’S Failure In Stock Exchange Of Thailand, Intha Thithapand
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study examines the negative return characteristic of momentum strategy, also known as momentum crashes, in Stock Exchange of Thailand from January 2001 to December 2018. This study aims to answer one main question. Do momentum crashes exist in Stock Exchange of Thailand? The result show that momentum crashes do exist in Stock Exchange of Thailand, where momentum portfolio perform poorly during panic state, defined by period that market rebound from its decline with high volatility. This poor performance is mainly driven by the option-like payoff characteristic of momentum portfolio, where the portfolio behave itself as a short call option, …
Evaluation Of Carbon Dioxide And Nitrate Utilization From Recirculating Aquaculture System For Microalgal Production, Kittikoon Sucunthowong
Evaluation Of Carbon Dioxide And Nitrate Utilization From Recirculating Aquaculture System For Microalgal Production, Kittikoon Sucunthowong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study evaluated carbon dioxide and nitrate utilization from tilapia cultivating system by means of microalgal cultivation. The first part of this study evaluated the feasibility of using nitrate-rich effluent from aquaculture to cultivate Scenedesmus armatus in comparison with the cultivation using BG-11 media. Comparable biomass productivity and pigment content of S. armatus from the cultivation indicated that nitrate-rich effluent from aquaculture could be used as substitute for a more expensive BG-11 growth media. The second part of this study evaluated the feasibility of utilizing carbon dioxide concentrated air from roughly 3 kg/m3 tilapia cultured tank to grow S. armatus. …
The Effect Of Control-Ownership Disparity On Earnings Management: Evidence From Korean Large Business Groups, Jaehyeok Kim
The Effect Of Control-Ownership Disparity On Earnings Management: Evidence From Korean Large Business Groups, Jaehyeok Kim
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study examines the difference in the use of earnings management at family-controlled firms belonging to Korean large business groups (chaebol) versus non-chaebol firms belonging to Korean large business groups from 2002 to 2016. Firms belonging to large business groups are subject to similar regulations by authorities. This study also tests whether a divergence between voting rights and cash flow rights affects earnings management by controlling shareholders. This study examines both accrual-based earnings management (AEM) and real-activities earnings management (REM), using two measures of accrual-based earnings management and three measures of real-activities earnings management. This study finds that chaebol firms …
The Effect Of U.S. Presidential Elections On Stock Market Liquidity In Emerging Economies, Phatarakorn Thongsathit
The Effect Of U.S. Presidential Elections On Stock Market Liquidity In Emerging Economies, Phatarakorn Thongsathit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper examines the effect of uncertainties that arises from U.S. presidential elections on emerging stock market liquidity over five period of elections from 2000 to 2016. The U.S. presidential elections created two uncertainties, which are political uncertainty and election uncertainty, before the election day. It is argued that the political uncertainty affects the emerging stock market liquidity through the change in future macroeconomic fundamentals while the election uncertainty is an uncertainty about the eventual winner of the election that affects the emerging stock market liquidity through market sentiment. Using monthly Iowa Electronic Markets data, this paper finds the evidence …
Heterogeneity In Reactions To Monetary Policy Of Thai Stock Returns, Siraphop Swingthong
Heterogeneity In Reactions To Monetary Policy Of Thai Stock Returns, Siraphop Swingthong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper investigates the effect of Thailand and U.S. monetary policy shock on stock market in Thailand for three level; market, industries and firm level from June 2000 to December 2018. In addition, this paper studies which firm characteristic cause the heterogeneity effect of stock and industry return on monetary policy innovation. Structural Vector Error Correction model follows Kim & Roubini (1999) and Ivrendi & Gulogu (2010) is applied to identify monetary policy shock.This paper finds that SET index return is statistically decrease 1.12 percentage point, on average in reaction to one standard deviation of unexpected increase in Thailand monetary …
A Neural Network-Based Method For Solving A Dynamic Investment And Consumption Problem With Transaction Costs And Stochastic Volatility, Kittipong Noonoi
A Neural Network-Based Method For Solving A Dynamic Investment And Consumption Problem With Transaction Costs And Stochastic Volatility, Kittipong Noonoi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Optimal investment and consumption problem with proportional transaction costs known as Davis \& Norman problem is a challenging portfolio free-boundary problem to solve. According to the HJB equation, see Davis and Norman (1990), there are three optimal regions i.e. no-trade region, buy region, and sell region in which different actions are prescribed. However, the two boundaries separating the three regions are unknown and it is crucial to discover them in order to obtain the optimal policy. Nonetheless, under a special class of model in which the excess return of stock is assumed to be positively linear in variance reflecting the …
A Reinforcement Learning Model For Lending Problems With Limited Budget And Insufficient Data, Radaporn Autravisittikul
A Reinforcement Learning Model For Lending Problems With Limited Budget And Insufficient Data, Radaporn Autravisittikul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Traditional lending policy requires sufficient data for making lending decisions, therefore, some small companies could not access to the fund. In this study, we propose a decision making model that can decide whether to accept or reject a sequence of unfamiliar loan applications while having a limited budget. Our model does not have any knowledge about the incoming loans, therefore, it can predict the default probability with low accuracy at the beginning. The model can learn by observing the outcomes of the accepted loans. The model's budget increases every time the model accepts a fully paid loan and decreases when …
Development Of Functional Foods Based On Anthocyanin-Rich Riceberry Rice Extract (Oryza Sativa L.) And Its Effects On Postprandial Biochemical Parameters In Human., Tanisa Anuyahong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Riceberry rice (Oryza sativa L.), is a crossbreed of Kao Hom Nin, a local non-glutinous purple rice and Khoa Dawk Mali 105. Its pigment contains high amount of antioxidant compounds, especially anthocyanins. Previously, riceberry rice exhibited its food application with high antioxidant activity. However, the potential of food application of riceberry rice extract (RBE) in yogurt and beverage products and its postprandial effect on humans remains unknown. In this study, RBE was prepared from a mixture of riceberry rice and distilled water in 1:2 w/v ratio following the freeze-drying process. The results showed that RBE contained phenolic compounds and anthocyanins …
Effects Of Astaxanthin Supplementation On Biological Parameters In Thai Healthy Volunteers, Chuenjai Sratongfaeng
Effects Of Astaxanthin Supplementation On Biological Parameters In Thai Healthy Volunteers, Chuenjai Sratongfaeng
Chulalongkorn University Theses and Dissertations (Chula ETD)
Astaxanthin, a powerful antioxidant, is widely used as a dietary supplement to promote several health benefits. However, the effects of long-term supplementation on general biological parameters in healthy adults is still insufficient. The objective of this study was to investigate the effects of 12-week astaxanthin supplementation on blood glucose, lipid profile and hematological parameters in healthy volunteers. Thirty-three healthy participants (16 in the experimental group and 17 in the placebo group) were enrolled in the study. The participants in the experimental group were supplemented with 4 mg/day of astaxanthin while those in the placebo group were supplemented with soybean oil …
Development Of Composite Film Coating For Freeze-Dried Fruit Slices, Nichayarach Invichian
Development Of Composite Film Coating For Freeze-Dried Fruit Slices, Nichayarach Invichian
Chulalongkorn University Theses and Dissertations (Chula ETD)
Edible film coating on food before freeze-drying process can be used for food preservation, especially in heat-sensitive food such as fruits and vegetables. Previous studies have been reported that trehalose had the cryoprotective effect and unique properties such as non-reducing sugar and low hygroscopic. However, no research has been conducted on the use of trehalose as film coatings. Therefore, this study aimed to develop a composite film consisting of alginate and trehalose and to evaluate physical properties of freeze-dried fruit slices coated with a composite film. The experiment was designed to prepare a composite film consisting of various concentrations of …
Nutritional Status And Dietary Perceptions In Colorectal Cancer Patients Undergoing Adjuvant Chemotherapy, Wipapak Raksawongsa
Nutritional Status And Dietary Perceptions In Colorectal Cancer Patients Undergoing Adjuvant Chemotherapy, Wipapak Raksawongsa
Chulalongkorn University Theses and Dissertations (Chula ETD)
Colorectal cancer treatment usually involves surgical resection following by adjuvant chemotherapy. Pathology and treatment are major causes of malnutrition. Therefore, this group of patients should receive specific nutritional counseling. Changes in eating behavior occur when the patients perceive the benefits of changes. Dietary perceptions information is useful in nutrition care. The aim of this prospective study was to examine the effect of individualized nutritional counseling on the nutritional status and dietary perceptions of 35 colorectal cancer patients receiving adjuvant chemotherapy at King Chulalongkorn Memorial Hospital from March to November 2019. The data were collected during the first to the third …
Characterization Of Bacillus Isolates Using Whole Genome Sequencing Analysis And Application As A Potential Food Probiotic, Gauri Khullar
Characterization Of Bacillus Isolates Using Whole Genome Sequencing Analysis And Application As A Potential Food Probiotic, Gauri Khullar
Chulalongkorn University Theses and Dissertations (Chula ETD)
Whole-genome sequencing (WGS) performed to evaluate potential probiotic properties of Bacillus species (6-2, 63-11 & 78-1) pre-reflecting antimicrobial properties, identified them as Bacillus velezensis (98.16%), Bacillus infantis (91.21%) and Bacillus amyloliquefaciens (99.06%) respectively. It also predicted K-mer resistance to cfr(B) and tet(L) proteins (6-2 & 78-1); bacteriocin and metabolite synthesis (6-2 & 78-1), terpenoid gene (63-11); hemolysin III (6-2 & 78-1) and hlyIII homolog (63-11); extracellular protease (6-2 & 63-11) and cell-bound protease (78-1) genes. WGS gut adaption F1F0 ATP, chaperonin (groEL, groES) and general stress response proteins (DnaK); EAL domain protein (biofilm), flagellin synthesis, and putative integral membrane proteins …
Encapsulation Of Adzuki Bean Vigna Angularis Hydrolysate By Alginate-Based Beads, Thasanporn Sangsukiam
Encapsulation Of Adzuki Bean Vigna Angularis Hydrolysate By Alginate-Based Beads, Thasanporn Sangsukiam
Chulalongkorn University Theses and Dissertations (Chula ETD)
The aims of this research were to study the effect of different cooking conditions on bioactive compounds and biological activities of cooked adzuki beans and cooking water. The different encapsulation methods to entrap adzuki beans hydrolysate were investigated. The release characteristics of different freeze-dried alginate particles were investigated after in vitro simulated gastrointestinal digestion. The results showed that all cooking conditions (60-min boiling, 10-min autoclaving and 60-min autoclaving) caused a significant reduction in crude protein, TCA-soluble peptides, free amino groups, total phenolic content (TPC) and total flavonoid content (TFC) in cooked adzuki beans (p ≤ 0.05). Meanwhile, cooking resulted in …
Geological And Mineralogical Characteristics Of Pilok And Takua Pit Thong Tin-Tungsten Deposits, Western Thailand, Karn Phountong
Geological And Mineralogical Characteristics Of Pilok And Takua Pit Thong Tin-Tungsten Deposits, Western Thailand, Karn Phountong
Chulalongkorn University Theses and Dissertations (Chula ETD)
Pilok and Takua Pit Thong mine were one of tin-tungsten mines associated with the Western Granitoid Belt. Despite the very poor condition of the outcrop, petrographic and geochemical studies reveal two granitoid units: porphyritic granite and equigranular granite, which show similar petrography characteristics except for tourmaline that appears only in equigranular granite, and their textures. Based on whole-rock geochemistry, porphyritic granite is ferroan to magnesian, alkalic, peraluminous granite whereas equigranular granite is ferroan to magnesian, alkali to alkali-calcic, peraluminous granite. Both granites show S-type affinity. The REE patterns show enrichment in LILE (e.g. K, Rb) and HFSE (e.g. Nb, Ta). …
Petrography And Geochemistry Of Volcanic Rocks In Khao Sam Sip Area, Sa Kaeo Province, Maythira Sriwichai
Petrography And Geochemistry Of Volcanic Rocks In Khao Sam Sip Area, Sa Kaeo Province, Maythira Sriwichai
Chulalongkorn University Theses and Dissertations (Chula ETD)
The volcanic rocks at Khao Sam Sip, Sa Kaeo province is part of the Loei-Phetchabun-Sa Kaeo Volcanic Belt. Based on field observation, petrographic and geochemical studies, the rocks in the study area can be divided into four rock units namely, 1) Basalt-andesite unit, 2) Polymictic andesitic unit, 3) Epiclastic unit, and 4) Clastic unit. Unit 1 is the lowest unit in sequence consisting of olivine-pyroxene-plagioclase basalt, pyroxene basalt, hornblende-plagioclase andesite, and plagioclase andesite. Unit 2 consists of polymictic andesitic breccia and polymictic andesitic sandstone. Unit 3 is epiclastic unit comprising of crystal-lithic sandstone and polymictic conglomerate. Units 4 includes fine-grained …
Geology And Mineralization Characteristics Of Epithermal Gold, Suwan Prospect, Changwat Phitsanulok, Tanad Soisa
Geology And Mineralization Characteristics Of Epithermal Gold, Suwan Prospect, Changwat Phitsanulok, Tanad Soisa
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Suwan prospect is located about 6 km northwest of the Chatree gold mine in Phitsanulok province, central Thailand. Gold-silver mineralization occurs as veins and stockworks hosted in volcaniclastic and volcanogenic-sedimentary rocks of Late Permian- Early Triassic age which is classified as a low sulfidation epithermal deposit base on mineralization texture, alteration pattern and sulfide mineral assemblages. From top to bottom, the hosted volcanic succession can be divided into 3 units, namely 1) Felsic volcanic unit (Unit 1), 2) Volcanogenic-sedimentary unit (Unit 2), and 3) Porphyritic andesite unit (Unit 3). Unit 1 consists predominantly of quartz-rich fiamme breccia, lithic-rich fiamme …
Organic Geochemical Characteristics Of Coal Deposits In Lampang Province, Patthapong Chaiseanwang
Organic Geochemical Characteristics Of Coal Deposits In Lampang Province, Patthapong Chaiseanwang
Chulalongkorn University Theses and Dissertations (Chula ETD)
ถ่านหินและหินตะกอนจำนวน 31 ตัวอย่างจากแหล่งถ่านหินแม่ตีบและแหล่งถ่านหินแม่ทานที่ตั้งอยู่ในจังหวัดลำปางทางตอนเหนือของประเทศไทยถูกนำมาศึกษาลักษณะเฉพาะทางธรณีเคมีอินทรีย์ (Organic geochemistry) ผลจากการวิเคราะห์ปริมาณสารอินทรีย์ทั้งหมด (Total organic carbon) พบว่าตัวอย่างถ่านหินจากแหล่งแม่ตีบมีค่าระหว่าง 30.12 - 73.71 wt. % และสูงกว่าตัวอย่างถ่านหินของแหล่งแม่ทานซึ่งมีค่าระหว่าง 23.48 - 52.50 wt. % หินดินดานจากทั้งสองแหล่งมีค่าใกล้เคียงกันระหว่าง 4.82 - 19.49 wt. % ในแหล่งแม่ตีบ และ 14.00 - 24.87 wt. % ในแหล่งแม่ทาน ค่าที่น้อยที่สุดของปริมาณสารอินทรีย์ทั้งหมดปรากฏในตัวอย่างหินโคลนซึ่งมีค่าระหว่าง 0.88 – 4.92 wt. % ในแหล่งแม่ตีบ และค่าระหว่าง 0.59 – 5.98 wt. % การวิเคราะห์ปริมาณสารอินทรีย์ที่สกัดได้ (Extractable organic matter) ในตัวอย่างหินของแหล่งแม่ตีบมีค่าระหว่าง 1,277 - 9,764 ppm ในขณะที่ตัวอย่างหินของแหล่งแม่ทานมีค่ามากกว่าโดยอยู่ระหว่าง 1,256-16,421 ppm จากข้อมูลข้างต้นทั้งสองแหล่งมีศักยภาพการเป็นชั้นหินต้นกำเนิดของแหล่งปิโตรเลียมอยู่ในเกณฑ์ดีถึงดีเยี่ยมยกเว้นหินโคลนบางตัวอย่าง ข้อมูลลักษณะเฉพาะทางธรณีเคมีอินทรีย์ศึกษาจากแก๊สโครมาโตแกรม (Gas chromatogram) ได้มาจากการวิเคราะห์โดยใช้เครื่องมือแก๊สโครมาโตกราฟี-แมสสเปกโตมิเตอร์ (Gas chromatography-mass spectrometer) ซึ่งให้ข้อมูลของตัวชี้วัดทางชีวภาพ (Biomarker and non-biomarker) ที่มีประโยชน์ในการตีความทั้งระดับความพร้อมสมบูรณ์ (Maturity) ชนิดของอินทรีย์วัตถุ (Organic matter input) และสภาพแวดล้อมการสะสมตัวในอดีต (Depositional environment) ในการศึกษานี้ถ่านหินมีระดับความพร้อมสมบูรณ์เทียบเคียงกับระดับถ่านหิน (coal rank) อยู่ในระดับลิกไนต์ถึงบิทูมินัสสารระเหยสูงระดับซี (Lignite – high volatile bituminous C) อ้างอิงจากตัวชี้วัดความพร้อมสมบูรณ์ทางชีวภาพ (Biomarker maturity) ซึ่งบ่งชี้ว่าตัวอย่างหินมีระดับความพร้อมสมบูรณ์อยู่ในระดับตอนต้น (immature-early mature stage) แก๊สโครมาโตแกรมของแอลเคนสายตรง (n-alkanes) …
Terrain Analysis In Phetchabun Province, Tanapat Pichetsopon
Terrain Analysis In Phetchabun Province, Tanapat Pichetsopon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Phetchabun province, lower northern Thailand is vulnerable to geohazards, landslide and flooding with the potential for significant harm to people and property. In addition, Phetchabun province has many lineaments that could be potential source of tectonic activities. In this study, terrain analysis techniques are used through 30 meters resolution Digital Elevation Model (DEM) data in order to determine geomorphic indices related to tectonic activity. The statistic index method (Si) is calculated in relation of six parameters to indicate landslide susceptible area. and the hydromorphometric contrast index (HCI) is used to identify sensitive area to flooding by evaluating five parameters. According …
Color Enhancement Of Tourmaline By Electron Beam Irradiation, Waratchanok Suwanmanee
Color Enhancement Of Tourmaline By Electron Beam Irradiation, Waratchanok Suwanmanee
Chulalongkorn University Theses and Dissertations (Chula ETD)
Tourmaline is a semi-precious stone that is quite popular in gem market. Red-purple tourmaline, so-called “Rubellite”, is particularly famous. Consequently, pink tourmalines have recently been enhanced by gamma radiation to intensify color as rubellite. In this study, an electron beam technique was applied for experimental treatment. Moreover, gamma ray irradiation was also applied to treat the same sample collection for comparison. Color enhancement was designed for both radiations at three levels of doses, i.e., 400, 800, and 1,200 kilogreys. Pink and green tourmalines from Nigeria were collected for the experiment. Each sample was cut into two tablets for experimental irradiations …
Suid Fossils And Sedimentology From The Chaloem Phra Kiat And Phimai Sandpits, Nakhon Ratchasima Province, Thunchanok Kawinate
Suid Fossils And Sedimentology From The Chaloem Phra Kiat And Phimai Sandpits, Nakhon Ratchasima Province, Thunchanok Kawinate
Chulalongkorn University Theses and Dissertations (Chula ETD)
The suid fossils were recorded in fluvial sediments at the Chaloem Phra Kiat and Phimai Districts, Nakhon Ratchasima Province. In this study, numerous suid fossils were identified systematically by the measurement and description in detail of the external morphology of teeth, and comparison with other related species. Sedimentary facies and facies association from stratigraphy of fluvial depositional environment from sandpits have also been studied. As a result, sediments from Chaloem Phra Kiat and Phimai sandpits comprise very fine to coarse-grained sand with dominate sedimentary structures of the fluvial deposits. The cumulative stratigraphical thickness of the studied successions was 12-15 m. …
Reconstruction Of Sea Level Fluctuation And Environmental Change In Khao Sam Roi Yot National Park, Changwat Prachuap Khiri Khan During The Late Holocene, Worakamon Nudnara
Reconstruction Of Sea Level Fluctuation And Environmental Change In Khao Sam Roi Yot National Park, Changwat Prachuap Khiri Khan During The Late Holocene, Worakamon Nudnara
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Gulf of Thailand is generally provided the efficiency evidences of sea level fluctuation according to the lack of tectonic events. Sam Ro Yot National Park (SRY) is located in the west coast of the Gulf of Thailand with its elevation approximately at sea level. Sedimentary sequences from SRY wetland has been obtained. This sedimentary sequence can be divided into 3 units, comprised dark grey silty to sandy clay of unit A, beige clay of unit B, and gyttja sediment of unit C. An intensive analysis was focused on core CP-4 because it is the longest core and compose of …
Correlation Development Of Wax Deposition Prediction From Fang Oil Field, Aung Thwin Thu Aye
Correlation Development Of Wax Deposition Prediction From Fang Oil Field, Aung Thwin Thu Aye
Chulalongkorn University Theses and Dissertations (Chula ETD)
In petroleum industry, wax deposition is a critical operational challenge. It occurs in various locations in the petroleum production chain including well tubing. Hexane, chemical inhibitor, is used to prevent the wax problem of oil from Fang oilfield by the measurement of pour point, wax appearance temperature (WAT) and wax deposition. An increasing shear rate can reduce WAT and the deposited amount increases with lowering the temperature in Fang crude oil. Moreover, the non-linear regression analysis of Fang crude oil with and without hexane in different conditions are done for all three tests. Those regression analysis equations can predict WAT …