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Articles 5101 - 5130 of 6471
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Economic Effects Of Social Capital, Roman Dennis Bausch
Economic Effects Of Social Capital, Roman Dennis Bausch
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis investigates economic effects of social capital in three separate studies. The first two studies deal with the effect of social capital on two factors that pave the way for fiscal stress, informality and fiscal cyclicality. While the shadow economy as a form of tax evasion deteriorates public revenues, a cyclical behavior of fiscal policy often goes along with an extension of lasting financial obligations in economic good times which makes public budgets vulnerable in following downturns. The third study focusses on the occurrence of fiscal stress which lends itself as research object for the analysis of the overall …
The Peri-Implant Soft Tissue Reactions And Cytokine Expressions Around Different Abutment Materials : Randomized Controlled Clinical Trial, Prapaphan Jaikla
The Peri-Implant Soft Tissue Reactions And Cytokine Expressions Around Different Abutment Materials : Randomized Controlled Clinical Trial, Prapaphan Jaikla
Chulalongkorn University Theses and Dissertations (Chula ETD)
Objectives : Stable peri-implant soft tissue around transmucosal zone are the crucial factor for long-term success and survival of dental implants. The aim of this study was to evaluate the expression of proinflammatory cytokines and chemokine around 3 types of abutment materials : titanium (Ti), zirconium oxide (Zr) and gold alloy (Au). Methodology : 15 dental implants were enrolled in this study. Clinical parameters and peri-implant crevicular fluid (PICF) were collected at weeks 4, 6, 8 and 10. The soft tissue characteristics were demonstrated using plaque assessment score and mucosal condition score. Cytokine levels were determined by enzyme-linked immunosorbent assay …
Ore Reserves Estimation Of The Nam Nga Coal Deposit, Lao Pdr, Using Geostatistical Method, Tongvang Bliachongvang
Ore Reserves Estimation Of The Nam Nga Coal Deposit, Lao Pdr, Using Geostatistical Method, Tongvang Bliachongvang
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research study focuses on estimating the coal deposit quantity and qualities as CV and AC at Nam Nga coal deposit, Lao PDR using OK and SGS geostatistical methods. A total of 295 assays data from 51 exploration drill holes collected from LID Company were used. The results reveal that OK produces geological resource of 2.2 MT with an average CV of 3,733 kcal/kg and an average AC of 48.68 %. The mineable reserve computed from OK's ultimate pit design and pit adjustment are 0.55 MT. The OK method produces 9.32 MT of wastes, yielding a stripping ratio of 10.4:1. …
Coping With Drug Abuse In Shan State, Thiri -
Coping With Drug Abuse In Shan State, Thiri -
Chulalongkorn University Theses and Dissertations (Chula ETD)
As we look around the study area, especially in the mountain areas and control over the ethnic armed groups areas, it is not hard to see the drug users and the other chemical substances selling and opium cultivation in the mountain areas. According to the drug dependents the opium cultivation can earn more money and easier than the other crops. As Lashio situated on the China- Myanmar Border Highway Road, China is the main producer of the chemical substances and importer to Myanmar. Because of the geographical situation, the study area is abundant in drug substances and chemical tablets. Heroin …
Impact Of Trade And Fdi Openness On Wages In The Manufacturing Sector In China, Qianyi Chen
Impact Of Trade And Fdi Openness On Wages In The Manufacturing Sector In China, Qianyi Chen
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of this study is to examine the impact of trade openness and foreign direct investment (FDI) on wages in China using a panel data set of 27 manufacturing sectors over the period of 2001 to 2016. The effects are separated into three groups: total industries, capital-intensive industries and labor-intensive industries. First, by comparing the determinants of three groups of industries, it shows that the impact of trade openness on wages only significant and positive in labor-intensive industries while the impact of FDI on wages is significantly positive in both capital-intensive industries and labor-intensive industries. Second, in the case …
Green-House Gas Storage Through Enhanced Hydrate Formation, Thiphakorn Absuwan
Green-House Gas Storage Through Enhanced Hydrate Formation, Thiphakorn Absuwan
Chulalongkorn University Theses and Dissertations (Chula ETD)
The CO₂ hydrate formation in the presence of different tetrahydrofuran (THF), sodium dodecyl sulfate (SDS), and methyl ester sulfonate (MES) concentrations was investigated in terms of kinetics and thermodynamics. The formation experiment was conducted in the quiescent condition and close system at 3 MPa and 3 °C. The results showed that the CO₂ hydrates formed in the presence of 10 mol% THF, while it did not form with 5.56 mol% THF. The presence of SDS or MES did not promote the hydrate formation. However, the hydrates formed in the presence of a mixture of SDS or MES with 5.56 mol% …
Optimization Algorithm Study : Mixed Integer Linear Programming, Tittawat Fongchantuk
Optimization Algorithm Study : Mixed Integer Linear Programming, Tittawat Fongchantuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
In the present, many petrochemical and petroleum products (engine fuel, solvent, plastic and synthetic rubber. etc.) are important. They are transported by ship, pipe line or train every day. So, minimizing transportation cost and time or maximizing profit is an important key of every company. In this optimization process, the optimal supply chain must be well developed in mathematical programming with the objective function of minimum cost or maximum profit and be solved by using optimization solvers. Objective functions and their constraints are solved by suitable types of optimization solvers: Linear programming (LP) and mixed integer linear programming (MILP). MILP …
Anticancer Effects Of Mansonone G Derivative On Human Colorectal Cancer Cells, Savinee Chanvijit
Anticancer Effects Of Mansonone G Derivative On Human Colorectal Cancer Cells, Savinee Chanvijit
Chulalongkorn University Theses and Dissertations (Chula ETD)
Mansonone G (MG), 1,2-naphthoquinone, isolated from the heartwood of Mansonia gagei Drumm (Chan-Cha-Mod), exhibited several pharmacological effects including anti-bacterial, anti-estrogenic and anti-adipogenic effects. However, anticancer activity of MG and its derivatives on colorectal cancer (CRC) has never been investigated. Therefore, the objective of this study was to investigate the cytotoxic effect of MG and its derivatives and to determine the mechanism(s) underlying cytotoxicity of the most potent MG derivative on two CRC cell lines, HCT-116 cells carrying p53 wild-type and HT-29 cells carrying p53 mutant. In the present study, MG and its derivatives could inhibit viability of HCT-116 and HT-29 …
Effect Of Different Polishing Systems, Forces, And Durations On Surface Roughness And Phase Transformation Of Monolithic Zirconia, Songsak Munkongsujarit
Effect Of Different Polishing Systems, Forces, And Durations On Surface Roughness And Phase Transformation Of Monolithic Zirconia, Songsak Munkongsujarit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study aimed to determine the effect of polishing systems, forces and durations on the surface roughness and phase transformation of zirconia. 72 pieces of fully sintered zirconia size 7 x 5 x 4 mm were fabricated with CAD/CAM, then divided into nine groups depending on the polishing systems and forces. All specimens were ground with fine diamond bur as the control, and initial surface roughness (Ra) was measured. The samples were then polished with one of the zirconia polishing systems (Diazircon or Komet ZR) or porcelain polishing system (Ceramaster), with forces at 1, 2 and 3 newtons. The polishing …
Ethanol Dehydration With Oxygen Cofeeding Over Palladium Catalyst Supported On Spherical Silica Particle With Ceria Modification, Kanjanee Sinchai
Ethanol Dehydration With Oxygen Cofeeding Over Palladium Catalyst Supported On Spherical Silica Particle With Ceria Modification, Kanjanee Sinchai
Chulalongkorn University Theses and Dissertations (Chula ETD)
Ethanol dehydration with oxygen cofeeding over palladium catalyst supported on spherical silica particle with ceria modification was carried out in fixed bed reactor under atmospheric pressure and temperature range of 150 ˚C to 350 ˚C (O2/Ethanol molar ratio = 2.2). The results showed that the effect of ceria modification of Pd/CeO2/SSP catalyst exhibited higher activity than Pd/SSP and CeO2/SSP at 200 ˚C. Pd/CeO2/SSP catalyst yielded very the high ethanol conversion at 200 °C about 57.7 %. However, the preparation method with different sequence of loading has significant effects on crystallite size, surface area, H2-TPR profile and catalytic activity. Pd-CeO2/SSP was …
Dehydration Of Ethanol To Diethyl Ether Over Beta Zeolite Catalysts, Montri Thapplee
Dehydration Of Ethanol To Diethyl Ether Over Beta Zeolite Catalysts, Montri Thapplee
Chulalongkorn University Theses and Dissertations (Chula ETD)
The catalytic ethanol dehydration to diethyl ether was investigated using synthesized beta zeolite catalysts having different Na and mixed Na-H form. The Na form in catalyst was synthesized by the hydrothermal process including non-calcined (Na-BEA_N) and calcined (Na-BEA_C) catalysts. The catalysts having different mixed Na-H forms were synthesized under ion-exchange method. In this study, two different cycles were chosen including one cycle (M-BEA_1) and four cycles (M-BEA_4). These catalysts were characterized by various techniques. The catalysts were tested to measure the catalytic activity at atmospheric pressure and the reaction temperature ranged from 150 to 400 °C. The results presented that …
Analysis And Design Of Vanadium Redox Flow Battery, Tossaporn Jirabovornwisut
Analysis And Design Of Vanadium Redox Flow Battery, Tossaporn Jirabovornwisut
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this study, the dynamic model of a vanadium redox flow battery (VRFB) was developed to analyze the battery performance and capacity degradation caused by an electrolyte imbalance from hydrogen and oxygen evolution and self-discharge side reactions. The model-based analysis of the VRFB performance revealed that the rate of battery capacity loss resulting from the electrolyte imbalance considerably depended on electrode and membrane material as well as operating conditions. Self-discharge reactions were controlled by the operational time of the battery. In addition, the rate of capacity degradation increased with an increase in the total vanadium concentration and operating temperature, affecting …
Gene Expression And Lipid Accumulation In Green Microalga Chlamydomonas Reinhardtii (137c) Under Salt Stress Condition, Thanapa Atikij
Gene Expression And Lipid Accumulation In Green Microalga Chlamydomonas Reinhardtii (137c) Under Salt Stress Condition, Thanapa Atikij
Chulalongkorn University Theses and Dissertations (Chula ETD)
Biodiesel is an important alternative energy that can reduce CO2 emission, the main cause of Global warming. Algal biomass has been considered to be the third generation biofuels. One of the important strategies that enhance lipid accumulation; precursor of biodiesel production, is stress cultivation. High salt concentration is one of a potential approach to enhance lipid accumulation in microalgae. Here, we investigated the impacts of salt on lipid accumulation in green microalga Chlamydomonas reinhardtii (137c). The results revealed that higher concentrations of NaCl, KCl, and LiCl led to increasing of saturated fatty acid contents for 1.8, 1.2, and 1.1 folds …
Preparation Of Polyurethane And Polyisocyanurate Foams Catalyzed By Metal Acetate-Ammonia Complexes, Benjatham Sukkaneewat
Preparation Of Polyurethane And Polyisocyanurate Foams Catalyzed By Metal Acetate-Ammonia Complexes, Benjatham Sukkaneewat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Metal acetate-ammonia complex solutions, namely Cu(Amm) and Zn(Amm), were synthesized and characterized by UV-visible spectroscopy and MALDI-TOF mass spectrometry. Cu(Amm) and Zn(Amm) were used as homogeneous catalysts for accelerating gelling (urethane formation) and blowing reactions (CO2 generation) of rigid polyurethane (RPUR) and polyisocyanurate (PIR) foams. Potassium octoate solution in diethylene glycol, which was used as a trimerization catalyst, was mixed with Cu(Amm) or Zn(Amm) to give a catalyst mixture which can catalyze gelling, blowing and trimerization reactions for the preparation of PIR foams. The catalytic activity of Cu(Amm) and Zn(Amm) in gelling and blowing reactions was compared to that of …
Pdms-Silver Nanocomposite For Bendable And Stretchable Conductive Stripes, Porapak Suriya
Pdms-Silver Nanocomposite For Bendable And Stretchable Conductive Stripes, Porapak Suriya
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this research, a simple and low-cost protocol for fabricating PDMS-silver composite as flexible conductive polymer is presented. Rod-shaped silver acetate (RS-AcOAg) was synthesized and fabricated into a solvent-cast RS-AcOAg film. The film was thermally decomposed into porous silver structures at 300ºC. The thermal decomposition of RS-AcOAg film induced the formation of silver microparticles (AgNPs) on the surface of RS-AcOAg with the expense of RS-AcOAg rod. AgNPs sintered into bigger particles and turned RS-AcOAg film into porous silver film consisting of interconnected quasi-sphere silver microparticles (AgMPs). The sintered structures transformed porous silver into rigid structures and affected the electrical resistivity …
Designing Binary Low Ift Surfactant System Using Hld Concept For Oil Recovery, Tukta Jamprakhon
Designing Binary Low Ift Surfactant System Using Hld Concept For Oil Recovery, Tukta Jamprakhon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Surfactant-based microemulsion technology is widely used in tertiary enhanced oil recovery applications (EOR). The formulation of suitable surfactant system is a key success in production and economic feasibility of this technology. The middle phase or Winsor Type III microemulsions, employed for selecting appropriate surfactant system, can offer an optimal salinity at which the high oil solubilization capacity and minimum interfacial tension (IFT) or ultralow IFT (<0.01 mN/m) are obtained. By this technology, more remaining oil in the reservoir can be solubilized and mobilized which leads to an improvement of oil recovery. This study aims to formulate surfactant systems for the oil recovery through microemulsion formulation. The novel mixed anionic surfactant system of a sodium dioctyl sulfosuccinate (AOT) and an internal olefin sulfonates (IOS) with different alkyl chain lengths (C15-18, C19-23, C24-28) were used due to its mixture avoiding the surfactant precipitation. The result found that the binary mixture of AOT and (IOS C15-18 and IOS C19-23) can form the middle phase at the mixing ratios of 5:5 to 9:1 (by molar ratio) with heptane and decane. When the fraction of IOS increased in the mixed AOT/IOS system, the optimal salinity (S*) also increased. For the effects of a carbon tail length of IOS surfactant was observed that the tail length increased with decreasing the optimal salinity. The hydrophilic-lipophilic deviation (HLD) for the mixed surfactant system was investigated to individually determine the K and Cc values for the IOS surfactants. The finding from this work provided a guide for surfactant selection through HLD concept to formulate microemulsion-based surfactant flooding for EOR application.
Physicochemical, Biopharmaceutical And Anti-Hepatocellular Carcinoma Properties Of Curcumin Diethyl Disuccinate, Chawanphat Muangnoi
Physicochemical, Biopharmaceutical And Anti-Hepatocellular Carcinoma Properties Of Curcumin Diethyl Disuccinate, Chawanphat Muangnoi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Curcumin ( Cur) has been reported for an anticancer activity by inducing apoptosis. However, the poor oral bioavailability of Cur due to chemical instability limits itself for further development as a chemotherapeutic agent. Previously, a succinate ester prodrug of Cur named as curcumin diethyl disuccinate (CurDD) has been designed and synthesized to enhance chemical stability of Cur. In this study, physicochemical and biopharmaceutical properties as well as in vitro and in vivo anti-hepatocellular carcinoma activities of CurDD were investigated and compared with those of Cur. CurDD could improve the stability of Cur in buffer pH 7.4 and simulated gastrointestinal fluids. …
Development Of In Situ Gel Containing Asiaticoside-Cyclodextrin Complex For Periodontal Tissue Regeneration, Hay Man Saung Hnin Soe
Development Of In Situ Gel Containing Asiaticoside-Cyclodextrin Complex For Periodontal Tissue Regeneration, Hay Man Saung Hnin Soe
Chulalongkorn University Theses and Dissertations (Chula ETD)
Asiaticoside (AS) is active herbal compound isolated from Centella asiatica. It has the potential benefit in promoting type I collagen (COL I) synthesis and osteogenic differentiation in human periodontal ligament cells. However, it has low aqueous solubility which may hamper the bioavailability. Thus, the main objective of this study was to develop the thermoresponsive in situ gels containing AS by using cyclodextrin (CD). To determine the solubility enhancement of AS, phase-solubility profiles were investigated and revealed that CDs enhanced the aqueous solubility of AS. Hydroxypropyl-beta-CD (HPβCD) and sulfobutyl-ether-beta-CD (SBEβCD) were selected due to highly solubilization enhancement of AS. The mucoadhesive …
Topoisomerase I Inhibitory Compounds From The Roots Of Paphiopedilum Callosum, San Yoon Nwe
Topoisomerase I Inhibitory Compounds From The Roots Of Paphiopedilum Callosum, San Yoon Nwe
Chulalongkorn University Theses and Dissertations (Chula ETD)
Paphiopedilum callosum (Rchb.f.) Stein belongs to the Orchidaceae family. The phytochemistry and bioactivity of this plant have not been previously reported. In this study, the chromatographic separation of methanolic extract of P. callosum roots was bioassay-guided by a yeast cell-based assay. One new compound, 3′-hydroxy-2,6,5′-trimethoxystilbene (PC1) and five known compounds including 3′-hydroxy-2,5′-dimethoxystilbene (PC2), 3-methylethergalangin (PC3), galangin (PC4), 2,3′-dihydroxy-5,5′-dimethoxystilbene (PC5) and 2,3′-dihydroxy-5′-methoxystilbene (PC6) were isolated. The chemical structures of these isolated compounds were elucidated and identified on the basis of analysis spectroscopic (ESI-MS, NMR and IR), as well as comparison with those reported in the literature. Their topoisomerase I poison activity …
Gene Expression Of Bcl2a1 และ Cxcl9 In Soft Tissue Covering Bone Grafting Materials, Borwonluk Taveedach
Gene Expression Of Bcl2a1 และ Cxcl9 In Soft Tissue Covering Bone Grafting Materials, Borwonluk Taveedach
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study was to assess the expression of Bcl2a1 and Cxcl9 genes in soft tissues covering bone grafted with demineralized freeze-dried bone allograft (DFDBA) and deproteinized bovine bone mineral (DBBM) in comparison with ones covering without grafting. The animals were randomly separated into three groups of treatment. Calvarial defect models were created on parietal bones. Bare defect models without bone graft as a control group. After one and three months, animals were sacrificed. Soft tissues covering the defected area were collected by punch technique. RNA was isolated and proceeded to Real-time reverse transcription quantitative polymerase chain reaction (RT-qPCR). Statistical analysis …
Fracture Resistance Of Non-Ferruled Endodontically Treated Teeth Restored With Different Fiber Post And Core Methods After Five Years Fatigue Loading, Puriwat Malakorn
Fracture Resistance Of Non-Ferruled Endodontically Treated Teeth Restored With Different Fiber Post And Core Methods After Five Years Fatigue Loading, Puriwat Malakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
The aim of this study was to compare the fracture resistance and failure mode of non-ferruled ETT restored with different fiber post and core methods after five years in vitro fatigue loading. Forty-eight uniradicular lower first premolar teeth were decoronated, endodontically treated and prepared for the post space. The prepared specimens were divided into four groups (n=12): single fiber-reinforced composite (FRC) post and flowable resin composite core (Group I), FRC post with an accessory fiber post and flowable resin composite core (Group II), resin composite relined FRC post and resin composite core (Direct anatomic post)(Group III), and resin composite relined …
Factors Affecting Utilization Of Family Planning Services Among Married Women Of Reproductive Age Living In The Rural Area Of Kayin State, Myanmar, Sabai Tun
Chulalongkorn University Theses and Dissertations (Chula ETD)
The rewards of promoting family planning services not only restricted to improving maternal or child health but also significantly advanced the fitting occasion to gain higher educational status, better employment, empowerment and greater socioeconomic status especially for girls and women. The main purpose of this study was to assess the utilization proportion of family planning services for contraception and to determine the factors affecting the utilization of contraception among 388 married women of reproductive age living in the rural area of Hpa-an Township, Kayin state, Myanmar. The data was collected by face to face interview in this quantitative cross-sectional descriptive …
Analysis Of Ncd Clinic Plus Program Among Hypertensive Patients In Kongra Hospital Patthalung Province Thailand: A 2014-2017 Secondary Data Analysis, Supaporn Promjeen
Analysis Of Ncd Clinic Plus Program Among Hypertensive Patients In Kongra Hospital Patthalung Province Thailand: A 2014-2017 Secondary Data Analysis, Supaporn Promjeen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Introduction: NCD Clinic Plus Program has been implemented in 2014 hospitals in Thailand since 2014. In 2015, Kongra Hospital, located in Patthalung province, is the best of small hospital or first-level hospital in Thailand and receives NCD Clinic Plus Award, The success of NCD Clinic Plus program was evaluated only the function of medical personnel. However, the patients’ outcomes have not been yet evaluated after program implementation since 2014. Objective and Method: This research aims, to access percentage of control and uncontrol blood pressure of patients during 2015-2017 and to find associated factors of control and uncontrol blood pressure of …
Promoting Physical Activity And Healthy Eating Behaviorby Nurse Coaching Through Line Application Among Overweight Women In Community, Phayathai District, Bangkok Thailand:A Randomized Controlled Trial, Yuphaporn Hongchuvech
Promoting Physical Activity And Healthy Eating Behaviorby Nurse Coaching Through Line Application Among Overweight Women In Community, Phayathai District, Bangkok Thailand:A Randomized Controlled Trial, Yuphaporn Hongchuvech
Chulalongkorn University Theses and Dissertations (Chula ETD)
The prevalence of overweight and obesity is increased rapidly and becoming a public health problem in many countries of the world including Thailand. Overweight increases the risk of several NCDs. The prevalence of overweight was higher in female than male. The imbalance between energy intake and energy expenditure were the common cause of overweight. The aim of this study was to evaluate the effect of health promotion program by nurse coaching through LINE application to improve knowledge, perception, and practice of physical activity and healthy eating behavior, body composition, blood pressure, and blood glucose among overweight women. A randomized controlled …
System For Styling Apparels That Match With Occasion Wearing Via E-Commerce Channel Using Machine Learning, Yongplut Yeing-Aramkul
System For Styling Apparels That Match With Occasion Wearing Via E-Commerce Channel Using Machine Learning, Yongplut Yeing-Aramkul
Chulalongkorn University Theses and Dissertations (Chula ETD)
This work studies the factors effecting the selection of apparels according to fashion styling via an e-commerce platform in order to build an automatic system for suggesting proper apparel concurred with the customers' preferences. The factors obtained from interviewing experts in the fashion area found that cloth items, apparel colors, skin colors, and body shape are the main factors effecting the selection of fashion styling via an e-commerce platform. These discovered factors were used to partition a set of experimental fashion styling apparel and also to construct a set of suggesting rules based on different values of each factor. The …
The Construction Of Images Of "Vietnam" In Contemporary Thai Writings, Tran Cam Tu
The Construction Of Images Of "Vietnam" In Contemporary Thai Writings, Tran Cam Tu
Chulalongkorn University Theses and Dissertations (Chula ETD)
This dissertation aims to examine the images of Vietnam portrayed in contemporary Thai writings (1990s-2015) and to analyse the construction of such images. Document research, textual analysis and interview reveal three outstanding images of Vietnam: (1) "Vietnam is a country of wars", which is initially constructed from old impressions about the Vietnam War of the Thai writers then are soon replaced by their first-hand experience in Vietnam with new aspects of the serious consequences of the wars as well as post-war struggles. (2) Next, Vietnam is in transition to modernity and integration, which is represented by the romanticised traditionality that …
Application Of Needle-Free Injection Technology For Foot And Mouth Disease Vaccination Via Intradermal Route, Sirirat Wataradee
Application Of Needle-Free Injection Technology For Foot And Mouth Disease Vaccination Via Intradermal Route, Sirirat Wataradee
Chulalongkorn University Theses and Dissertations (Chula ETD)
Foot and mouth disease (FMD) is an endemic disease in Thailand and caused severe economic loses. In order to prevent and control disease, the vaccination program is routinely administered for 2-3 times a year via subcutaneous route (SC). Even though, the vaccination is performed regularly, the outbreaks have often reported. The outbreaks occur due to the failure of number of immunity animal in population or herd immunity. The limitation of vaccine distribution to all animal population and difficulty of cattle restraint are forcible several farmers to failing to vaccinate their animals. Based on previous studies, the intradermal route (ID) can …
การพัฒนารูปแบบการจัดการค่ายโดยใช้ระบบสนับสนุนการตัดสินใจแบบกลุ่มด้วยเทคนิคการคิดนอกกรอบและ Pmi เพื่อส่งเสริมความสามารถในการแก้ปัญหาเชิงสร้างสรรค์สำหรับผู้เรียนในระดับอุดมศึกษา, ขจรพงษ์ พูลสวัสดิ์
การพัฒนารูปแบบการจัดการค่ายโดยใช้ระบบสนับสนุนการตัดสินใจแบบกลุ่มด้วยเทคนิคการคิดนอกกรอบและ Pmi เพื่อส่งเสริมความสามารถในการแก้ปัญหาเชิงสร้างสรรค์สำหรับผู้เรียนในระดับอุดมศึกษา, ขจรพงษ์ พูลสวัสดิ์
Chulalongkorn University Theses and Dissertations (Chula ETD)
การวิจัยครั้งนี้มีวัตถุประสงค์ ดังนี้ 1) เพื่อศึกษาสภาพปัญหาและประเมินความต้องการจำเป็น ในการจัดการกิจกรรมค่ายของนิสิตนักศึกษาระดับอุดมศึกษา 2) เพื่อพัฒนารูปแบบการจัดการค่ายโดยใช้ระบบสนับสนุนการตัดสินใจแบบกลุ่มด้วยเทคนิคการคิดนอกกรอบและ PMI เพื่อส่งเสริมความสามารถในการแก้ปัญหาเชิงสร้างสรรค์สำหรับผู้เรียนในระดับอุดมศึกษา ตัวอย่างในการวิจัยได้จากการสุ่มตัวอย่างแบบหลายขั้นตอน คือ นิสิต นักศึกษา ระดับอุดมศึกษา ผู้ที่เคยมีประสบการณ์เข้าร่วมค่าย จำนวน 480 คน นิสิต นักศึกษา ระดับอุดมศึกษา ผู้ที่เคยมีประสบการณ์จัดค่าย จำนวน 54 คน เครื่องมือที่ใช้ ประกอบด้วย แบบสัมภาษณ์ แบบสอบถาม และรูปแบบการจัดการค่ายฯ วิเคราะห์ข้อมูลโดยใช้ แจกแจงความถี่ ร้อยละ ค่าเฉลี่ย และวิเคราะห์ความต้องการจำเป็น ผลการวิจัยมีดังนี้ 1. นิสิต นักศึกษา ระดับอุดมศึกษามีความต้องการจำเป็นในระบบสื่อสารกันในทีมเพื่อการประชุมตัดสินใจเพื่อแก้ไขปัญหาและวางแผนล่วงหน้า ในลำดับความต้องการมากที่สุด รองลงมาคือ ระบบช่วยดำเนินการจัดค่ายเป็นขั้นตอน ระบบเตือนความจำ บันทึกรายงาน แจกจ่ายงาน และตามงาน และ ระบบวางแผนและแสดงผลแบบ Timeline 2. รูปแบบการจัดการค่ายฯ มี 5 องค์ประกอบ ได้แก่ 1) กลยุทธ์การจัดการค่าย 2) คุณลักษณะผู้จัดค่าย 3) บทบาทอาจารย์ที่ปรึกษาค่าย 4) ระบบเว็บสนับสนุนการตัดสินใจแบบกลุ่ม และ 5) ประเมินผล ขั้นตอนรูปแบบการจัดการค่าย 6 ขั้นตอน ได้แก่ 1) เตรียมความพร้อม 2) ศึกษากระบวนการ 3) วางแผนจัดค่าย 4) เตรียมค่าย 5) ดำเนินการจัดค่าย และ 6) สรุปและประเมินผลการจัดค่าย 3. ผลการทดลองใช้รูปแบบพบว่า นิสิตกลุ่มทดลองมีคะแนนเฉลี่ยความสามารถในการแก้ปัญหาเชิงสร้างสรรค์สูงกว่าคะแนนเฉลี่ยก่อนใช้อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 4. ผลการประเมินและรับรองรูปแบบการจัดการค่ายฯ โดยผู้ทรงคุณวุฒิ มีค่าเฉลี่ยเท่ากับ 4.83 อยู่ในระดับเหมาะสมมากที่สุด
ผลของการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิด ที่มีต่อความสามารถในการแก้ปัญหาและการให้เหตุผลทางคณิตศาสตร์ ของนักเรียนมัธยมศึกษาชั้นปีที่ 3, นฤพันธุ์ เพ่งพิศ
Chulalongkorn University Theses and Dissertations (Chula ETD)
การวิจัยครั้งนี้มีวัตถุประสงค์เพื่อ 1) เปรียบเทียบความสามารถในการแก้ปัญหาทางคณิตศาสตร์ของนักเรียนชั้นมัธยมศึกษาปีที่ 3 ก่อนและหลังการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิด 2) เปรียบเทียบความสามารถในการแก้ปัญหาทางคณิตศาสตร์ของนักเรียนชั้นมัธยมศึกษาปีที่ 3 หลังการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดเทียบกับเกณฑ์ร้อยละ 60 3) เปรียบเทียบความสามารถในการให้เหตุผลทางคณิตศาสตร์ของนักเรียนชั้นมัธยมศึกษาปีที่ 3 ก่อนและหลังการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิด 4) เปรียบเทียบความสามารถในการให้เหตุผลทางคณิตศาสตร์ของนักเรียนชั้นมัธยมศึกษาปีที่ 3 หลังการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดเทียบกับเกณฑ์ร้อยละ 60 โดยกลุ่มตัวอย่างเป็นนักเรียนมัธยมศึกษาปีที่ 3 ของโรงเรียนขนาดใหญ่ สังกัดสำนักงานเขตพื้นที่การศึกษามัธยมศึกษาเขต 1 กรุงเทพมหานคร จำนวน 48 คน เครื่องมือที่ใช้ในการทดลอง คือ แผนการจัดกิจกรรมการเรียนรู้คณิตศาสตร์ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิด เครื่องมือที่ใช้ในการเก็บรวบรวมข้อมูล คือ แบบวัดความสามารถในการแก้ปัญหาทางคณิตศาสตร์ และแบบวัดความสามารถในการให้เหตุผลทางคณิตศาสตร์ วิเคราะห์ข้อมูลโดยหาค่าเฉลี่ยเลขคณิต ส่วนเบี่ยงเบนมาตรฐาน และการทดสอบค่าที ผลวิจัยพบว่า 1) นักเรียนที่ได้รับการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดมีความสามารถในการแก้ปัญหาทางคณิตศาสตร์หลังเรียนสูงกว่าก่อนเรียน อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 2) นักเรียนที่ได้รับการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดมีความสามารถในการแก้ปัญหาทางคณิตศาสตร์หลังเรียนสูงกว่าเกณฑ์ร้อยละ 60 อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 3) นักเรียนที่ได้รับการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดมีความสามารถในการให้เหตุผลทางคณิตศาสตร์หลังเรียนสูงกว่าก่อนเรียน อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 4) นักเรียนที่ได้รับการจัดกิจกรรมการเรียนรู้ตามกระบวนการสำรวจเชิงคณิตศาสตร์ร่วมกับคำถามปลายเปิดมีความสามารถในการให้เหตุผลทางคณิตศาสตร์หลังเรียนสูงกว่าเกณฑ์ร้อยละ 60 อย่างมีนัยสำคัญทางสถิติที่ระดับ .05
Biological Activities Of Phenolic Compounds Extracted From Some Plant Species From East Kalimantan Province, Indonesia, Franxisca Mariani
Biological Activities Of Phenolic Compounds Extracted From Some Plant Species From East Kalimantan Province, Indonesia, Franxisca Mariani
Chulalongkorn University Theses and Dissertations (Chula ETD)
Ten medicinal plants used in this study are based on the experience of Dayak tribes. The scientific information about these plants are still limited, therefore, the objective of the present study was to analyze their phenolic content and biological activities. A selected species was subjected to successive extraction and compound isolation. The total phenolic content and total antioxidant capacity were analyzed by using Folin-Ciocalteu reagent and the phosphomolybdenum method, respectively. DPPH and ABTS assays were used for analyzing antioxidant activities. The antibacterial activity was performed against six bacterial strains by agar well diffusion and microdilution methods. The anti-tyrosinase activity used …