cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2006.1633
title: Change in the perception of the Naga fireballs : a case study of Amphoe Phon Pisai, Changwat Nong Khai

description: This research has objectives in exploring the traditional perception of the Naga fireballs in Amphoe Phon Pisai and analyzing the factors contribute towards its change in the perception. Questionnaires and in-dept interview were used as data collection tool. For the people of Phon Pisai, the Naga fireballs or 'Bungfai Phayanaak' are originally perceived as 'Bungfai phii' or "Lukfai nam'. There is no evidence showing that local people connects these mysterious fireballs with the Naga. Later, the attempt in relating the mysterious fireballs to the Naga belief, which has been rooted in their society for several centuries, has been made. It results in the change in the perceptin of 'Bungfai phii' or 'Lukfai nam' to become the perception of Bungfai Phayanaak'. It can be said that local people perceive the mysterious fireballs rising from the Mekong River as the creation of the Naga. However, the change in the perception of local people dose not stop. The Tourism Authority of Thailand has played an important role in promoting the Naga fireballs to the nationwide which results in the diversity of the new perceptions. The new perception that the young local people accept is the scientific explanation. In addition, the phenomenon. which used to be perceived as the sacred one, becomes profane because of the change in the perception among local people.
DOI: 10.14457/cu.the.2006.1634
title: Development of acellular dermis from porcine skin
DOI: 10.14457/cu.the.2006.1635
title: China's cultural diplomacy in Southeast Asia from the 1990S to the present : a case study of Thailand and Vietmam

description: From the early 1990s, China has been rising rapidly in terms of economic and also military power. While the rise of China has sparked a debate on a China threat theory in the arena of international relations, sense of concerns has also been felt in Southeast Asia, the neighboring region of China. However, this region plays an important role to the PRC's traditional security and economic reform. Therefore, it is in China's interests that it maintains friendly relations with its Southeast Asian neighbors. In this context, China's cultural diplomacy has been deployed as part of greater diplomatic efforts in the region to dispel the China threat and secure a stable, peaceful regional environment for its economic development. By using culture as a diplomatic tool, China can capitalize on the long history and uniqueness of its culture and the world's recently increased interest in Chinese culture and language. Furthermore, the aggressive promotion of Chinese culture and language to the world would also help China to resolve the 'cultural deficit' it is facing now. In case study of Thailand and Vietnam, it is found out that in its cultural diplomacy, China mainly focuses on the promotion of Chinese art and culture, Chinese language, educational exchange, tourism and media exchange. As Chinese language remains to be a great barrier to communication between China and the world, thus to success in the spread of Chinese culture, the promotion of Chinese language study appears to be the most important area of the PRC's cultural diplomacy, with the newly-invented but seemingly most aggressive tool, the Confucius Institute. With a lot of favorable conditions in Thailand and Vietnam and the delicacy in its conduct, China's cultural diplomacy has been received quite well in the two target countries and contributed to upholding the positive attitudes by both the leaderships and the public in Thailand and Vietnam towards China in general and its culture in particular. However, the level of perception towards China may vary in these two countries as they possess different settings in terms of history, politics, culture and demography in relation to China. On the surface, Thailand appears more enthusiastic about Chinese culture and language, while Vietnam seemingly looks to China more for a model in political reform and economic development.
DOI: 10.14457/cu.the.2006.1636
title: Development of Anti-wrinkle lotion containing Artocarpus Lakoocha heartwood extract

description: The aims of this study were to assess the physicochemical stability of Artocarpus lakoocha heartwood extract (Puag-Haad) under various conditions and to evaluate its anti-wrinkle activity in female volunteers. Initial stability test revealed that citrate buffer pH 5.5 was able to maintain the original color and provided the highest content of oxyresveratrol of 91.77% in Puag- Haad solution. Addition of 0.02% butylated hydroxyanisole (BHA) alone could provide sufficient chemical stabilization at 45ºC for 12 weeks. Stability was further enhanced by a combination of 0.02% BHA and 0.02% sodium metabisulfite, which could stabilize both the color and content of oxyresveratrol in Puag-Haad solution kept at 30 ºC for 24 weeks. Eighty-six female volunteers subsequently participated in an 8-week parallel clinical trial with self-control to evaluate the antiwrinkle efficacy of solutions containing Puag-Haad (0.10 and 0.25%) in comparison with 0.10% epigallocatechin gallate (EGCG) and 0.10% vitamin C. It was found that 0.10% Puag-Haad solution was the most effective, with the roughness values as measured by Visioscan® becoming significantly with 95% confidence interval lower than its self-control after only 2 weeks of application and remained significant until the end of the study. This was followed by 0.25% Puag-Haad and 0.10% EGCG solutions, which demonstrated similar anti-wrinkling efficacy, whereas 0.10% vitamin C was the least effective. Thus, 0.10% Puag-Haad and 0.10% EGCG were formulated into lotion for further clinical study using similar protocol. The skin elasticity, capacitance (hydration) and whitening extent were also measured. It was found that 0.10% Puag- Haad lotion gave faster anti-wrinkle efficacy than 0.10% EGCG lotion, with the roughness values becoming significantly lower than its self-control after 6 weeks as compared to 8 weeks for EGCG. The extent of wrinkle improvement by Puag-Haad lotion was 5.78 - 5.93%. Both the Puag-Haad and EGCG lotions did not improve the skin elasticity but Puag-Haad lotion had an added benefit of skin whitening activity. Skin hydration also improved in both lotions due to the moisturizing effect of the lotion base. Considering its multi-functional activities, the inexpensive and easily available A. lakoocha extract or Puag-Haad has a very promising potential for use as a safe and effective anti-wrinkle/skin whitening ingredient in cosmetic preparations.
DOI: 10.14457/cu.the.2006.1637
title: Development of Bangkok air quality management policy: application of the air pollution model (TAPM)
DOI: 10.14457/cu.the.2006.1638
title: Effect of organoclay on mechanical and gas barrier properties of nylon 6

description: In this study, nylon 6/clay nanocomposite films were prepared via twin screw extruder attached with blown film set. Nylon 6 was melt blended with organoclay, treated with amine surfactants. The effect of number of long alkyl tail surfactant that used to treated sodim bentonite on the dispersion of clays in nylon 6 nanocomposite films was determined. In addition, the effect of organoclay loading on thermal, mechanical and gas barrier properties of nylon 6/clay nanocomposite films were also studied. In XRD results, nylon 6/clay nanocomposite films, treated with one alkyl tail surfactant (M[subscript 3]T), showed better dispersion of layered silicates than those treated with two alkyl tail surfactant (M[subscript 2](HT)[subscript 2]). However, layered silicates M[subscript 3]T naoncomposite films contained an intercalated structure that was confirmed by TEM image. Moreover, the addition of organoclay into nylon 6 matrix enhanced the formation of gamma–crystalline phase of nylon 6 confirmed by XRD and SDC results. Besides the enhancement of gamma–crystalline phase of nylon 6, the addition of layered silicates leaded to the increase of degree of crystallinity and crystallization temperature (T[subscript c] ). For mechanical properties, M[subscript 3] T nanocomposite films exhibited higher stiffness than M[subscript 2](HT)[subscript 2] nanocomposite films at any inorganic loading. Especially, adding 7 wt% of organoclay into M[subscript 3]T naonocomposite films increased tensile modulus by 167% compared with neat nylon 6 film. Moreover, nylon 6/clay nanocomposite films in machinery direction exhibited higher stiffness than those in transverse direction at any inorganic loading. In addition, oxygen permeability of M[subscript 3]T nanocomposite films exhibited lower than that of M[subscript 2](HT)[subscript 2] nanocomposite films. The oxygen permeabilty of M[subscript 3]T nanocomposite films decreased by 27 percent when organoclay loading approached to 5 wt%.
DOI: 10.14457/cu.the.2006.1639
title: Dry reforming of methane using dense palladium membrane supported on porous stainless steel

description: In this research, the electroless plating technique had been used for palladium plating on porous stainless steel. The plating condition was determined using normal and porous stainless steel disks. The appropriate plating condition was at 60ºC for 90 minutes and palladium layer thickness was measured gravimetrically and compared with the results from SEM. By using SEM-EDS, the metal diffusion from stainless steel to palladium layer was found when the temperature was higher than 500ºC. Two palladium membrane tubes with effective surface area of 20 cm² and average pore size 0.1 µm, Tube 1 (19.3 µm thickness) and Tube 2 (17.5 µm thickness), were prepared. The performance testing of these tubes were investigated by assembling it in the reactor. Helium flux and hydrogen permeation flux were then measured at 350- 450ºC and pressure differences 1-3 atm. The helium flux was not detected for Tube 1 and only a trace of helium flux was found for Tube 2. Therefore, palladium membranes of both tubes were proved to be dense. Higher conversion of methane and carbon dioxide using palladium membrane tube reactor containing Tube 1, comparing to conventional tube reactor utilized 1% Pt/Al₂O₃ as the catalyst at the same reaction condition was resulted which was monitored by gas chromatographic technique. It was also found that higher conversions were obtained when the temperature of reactor increased. Furthermore, when argon was used as a sweep gas, higher conversion was obtained and increased with increasing sweep gas flow rate. To prevent the metal diffusion, several kinds of materials as the incremental layer on porous stainless steel disks were generated before palladium plating, i.e. silver-tungsten, silica, chromium, and chromium oxide. After the exposure at 500ºC for 24 hours in helium, the intermetallic diffusion of these disks was investigated by SEM. It was found that no intermetallic diffusion was observed in case of Cr₂O₃ layer. The palladium membrane tube with palladium layer thickness of 32µm, Tube 3, was then prepared with Cr₂O₃ intermetallic diffusion barrier at the thickness of 2µm. It was confirmed to have dense palladium membrane by helium flux measurement. Its hydrogen permeation flux at 500ºC was not declined, which was in contrast to the previous result when the other palladium membrane tube without Cr₂O₃ layer was used, implying that Cr₂O₃ acted as the good intermetallic diffusion barrie
DOI: 10.14457/cu.the.2006.1640
title: Fiber-reinforced PC/ABS composite for light weight ballistic armor

description: This research aims to develop light weight ballistic armor by using Kevlar-reinforced PC/ABS composite. It has been known that optimal interaction between polymer matrix and its reinforcement plays a crucial role in its mechanical behavior such as impact properties. At present, the matrix development for reinforcing fiber particularly in the ballistic composite application is scarcely investigated because the restriction in the lack of tailor-made properties of the matrix itself. Many researchers disclosed various properties of PC/ABS which can be fine-tuned to acquire desired properties by, for example, adjusting the blending ratios between the PC and the ABS. This investigation emphasized on the effect of PC/ABS blend compositions on their blend properties as well as the ballistic efficiency of their composites. The DSC thermograms of PC/ABS blends exhibited two Tg’s of the PC-rich and ABS-rich phases. The glass transition temperatures of each component were observed to shift towards each other possibly as a result of their partial miscibility. From the mechanical property investigation of the blends, the elastic modulus of these PC/ABS blends exhibited synergistic behavior giving the ultimate modulus value within the blend compositional range of 40 – 60 wt% of the PC. It was also found that the composites with 40/60 mass ratio of the PC/ABS matrix exhibited the highest ballistic efficiency in comparison with other blend compositions. The flexural modulus of the composite with highest ballistic resistance was about 10-13 GPa with an average areal density of 0.23 g/cm² in a 10 piles/panel composite. Additionally, at least 50 piles of the Kevlar cloth in the composite panel were found to be sufficient to protect ballistic impact penetration of the ammunition at a relatively high level of NIJ class IIIA.
DOI: 10.14457/cu.the.2006.1641
title: Effects of curcumin on gastric microvascular leakage, NF-KB-p65 expression, and change in VEGF level in Helicobacter pylori infected rats

description: The H. pylori infection causes gastric inflammation and the release of inflammatory mediators. Curcumin, an active ingredient of tumeric (Curcuma longa), has many of biological activities including anti-inflammation. Therefore, this study aims to determine effects of H. pylori infection and anti-inflammatory effect of curcumin doses on the macromolecular leakage from gastric microcirculation, NF-KB-p65 expression in gastric epithelial cells and serum VEGF level in rats. Male Sprague-Dawley rats were divided into five groups including control, curcumin control, H. pylori infected, H. pylori infected with curcumin 200 mg/kg BW treated, and H. pylori infected with curcumin 600 mg/kg BW treated groups. Two weeks after H. pylori inoculation, curcumin 200 mg/kg BW or 600 mg/kg BW were fed once daily to curcumin treated group for one week. The intravital fluorescence microscopic technique was performed to examine macromolecular leakage from gastric postcapillary venules. Then, the stomach was removed for immunohistochemistry of NF-KB-p65 expression. In addition, serum VEGF was analyzed by using ELISA technique. The successful inoculation of H. pylori was 85%. H. pylori infection led to the macromolecular leakage, the NF-KB-p65 expression, and increase of VEGF level compared with control group. The average percentages of macromolecular leakage were 10.69% ± 1.43 and 15.41% ± 2.83, NF-KB-p65 immunoreactive cells were 28.58% ± 2.82 and 44.2% ± 5.24, and the average concentrations (pg/ml) of VEGF level were 228.57 ± 40.41 and 619.43 ± 145.68 in control and H. pylori infected group, respectively. Curcumin control group did not significantly change baseline of these parameters. There were significant decrease of macromolecular leakage and NF-KB-p65 expression (p ≤ 0.05) in the both curcumin treated groups compared with H. pylori infected group. The average percentages of macromolecular leakage were 12.32% ± 2.13 and 13.72% ± 2.22, and NF-KB-p65 immunoreactive cell were 33.99% ± 4.83 and 37.11% ± 4.34 in curcumin 200 and 600 mg/kg BW treated groups, respectively. Whereas, the effect of curcumin on VEGF level did not significantly change compared with H. pylori infected group. These results could be concluded that H. pylori infection increased macromolecular leakage, NF-KB-p65 expression, and serum VEGF level. Although curcumin did not significantly decrease serum VEGF level, it can reduce macromolecular leakage and NF-KB-p65 expression. It is implied that curcumin may have the anti-inflammatory effect on H. pylori infection.
DOI: 10.14457/cu.the.2006.1642
title: Entrapment of unstable active compounds by chitosan nanocapsules

description: In this work, mPEG-phthaloylchitosan and mPEG-4-methoxycinnamoyl-phthaloylchitosan nanoparticles were synthesized. The synthetic processes involved 1) reacting of chitosan with phthalc anhydride to give phthaloylchitosan which was soluble in organic solvent 2) esterifying of mPEG-COOH (and 4-methoxycinnamic acid) with the phthaloylchitosan and 3) preparing nanopaticles from the chitosan derivatives by solvent displacement method. Grafting of mPEG-COOH onto chitosan gave mPEC-phthaloylchitosan with 7% degree of substitution. The obtained product is negatively charged (-30.3 mV) nanoparticles with an average sizes of 40-150 nm. Studying of patch test and photopatch test of the particles showed no sign of irritation to the human skin. Furthermore, encapsulation of 2-ethylhexyl-p-methoxycinnamate (EHMC), ascorbyl palmitate and astaxanthin into the particles gave the particles with 45, 39 and 94% (w/w) of the actives in the particles at encapsulation efficiency (EE) of more than 97% (w/w). Photostabilitys tudy indicated that the EHMC that was encapsulated into the prepared particles was more photostable than the free EHMC. Grafting of mPEG-COOH and 4-methoxycinnamic acid onto phthaloylchitosan gave mPEG-4-methoxycinnamoyl-phthaloylchitosan with degree of substitution of 0.313 and 5.7%, respectively. The product is negatively charged (-31.53) nanoparticles with the average sizes of 100-450 nm. Encapsulation of astaxanthin and ascorbyl palmitate into the particles gave product with 22 and 69% (w/w) of the actives at 100% EE.
DOI: 10.14457/cu.the.2006.1643
title: Foreign policy change of Thailand under Chatichai Choonhavan's administration : from a cold war style to a regional power style

description: Thailand’s foreign policy toward Indochinese states drastically changed under Prime Minister Gen. Chatichai Choonhavan’s policy of turning Indochina “from battlefield to a market place”. Under this policy initiative, the Chatichai administration introduced new philosophy into the kingdom’s Indochina policy that economy preceded politics. Before he came to office, Thailand’s policy toward the neighboring socialist states, in its formation as well as practice, was almost unitary and security concerns and issues took primacy over other issues on hierarchy of policy options. Behind this traditional modality of diplomacy, there was a stern external environment of international politics of Cold War. Accordingly, the political structure of Thailand also assumed to be highly security-conscious and successive governments inclined to consider internal instability as being related with external threats. Under this modality, Indochina was regarded as the primary source of the instability and the kingdom calculated her relations with Indochina formulated on such perception. When Chatichai came to power in August 1988, the situation, however, began to change. As he placed economy first in his Indochina initiatives, the hitherto hierarchy of security-dominant policy toward Indochina appeared to collapse. The rapidly growing Thai economy and development of democracy contributed to the policy shift, i.e., the number of business-cum-politicians had increased during the years of previous Prem Tinsulanonda administration and they asserted their business interests even over the neighboring states and Chatichai, who was the first popularly-elected premier since Seni Pramoj in 1976, reacted to their in favor. To achieve the new policy in the Indochina relations, Chatichai installed his Private Advisory Group who had different perception of Indochina from that of Ministry of Foreign Affairs and allowed the advisers to involve themselves not only in policy making but also in its practice. This new apparatus in the government finally attained power in the venue of Indochina policy. With the collapse of highly-security-concerned policy hierarchy, Thailand’s relation with Indochinese states came into a new phase in which problems related with the socialist states were resolved by issue areas, from the traditional monolithic realist approach.
DOI: 10.14457/cu.the.2006.1644
title: Formulation of doxycycline loaded chitosan microspheres in glyceryl monooleate-based drug delivery systems for periodontitis

description: The purposes of this study were to develop chitosan microspheres containing doxycycline hyclate and incorporate into glyceryl monooleate-based drug delivery system for the treatment of periodontal disease. The chitosan microspheres were prepared by using emulsification and ionotropic gelation method. The Box-Behnken experimental design was used as a tool for optimize the formulation. From the result obtained the fomulations comprising of doxycycline hyclate load (%), chitosan (%) and sodium tripolyphosphate (STPP) (%) as 75:3:15, 75:4:10 and 30:3:10 were selected. The microspheres could sustain release of doxycycline hyclate over a period of 24 hrs and followed square root of time kinetic which indicated that the rate of release was diffusion controlled. The accelerated stability study at 40, 50, 60 and 70 ℃ and the Arrhenius plot indicated that the predicted shelf-lives of microsphere formulations comprising of doxycycline hyclate load (%), chitosan (%) and STPP (%) of 75:3:15, 75:4:10 and 30:3:10 were 47.04, 245.65 and 22208.38 days, respectively. The ternary phase diagram consisted of triglyceride: glyceryl monooleate: water was constructed and the structure of liquid crystalline phases was investigated by using polarized light microscopy. Regarding the ability to form the reverse hexagonal liquid crystalline phase, the formulation containing triglyceride: glyceryl monooleate: water of 6:15:79 was selected as the drug delivery system. The release study indicated that the chitosan microspheres incorporated in glyceryl monooleate-based drug delivery system could prolong the release of doxycycline hyclate over a period of 48 hr and also followed square root of time kinetic. Additionally, the doxycycline hyclate loaded chitosan microspheres in glyceryl monooleate-based drug delivery system exhibited in vitro antimicrobial activity against Staphylococcus aureus ATCC 6538P, which was found in the periodontal pockets of patients with periodontitis