cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2006.1821
title: Diagnosis of acute renal failure by urinary cystatin C to creatinine ratio in patients undergoing coronary angiography

description: Objective: Acute renal failure (ARF) in patients undergoing coronary angiography diagnosed by daily serum creatinine monitoring is inconvenient and under-investigated. It is interesting whether ARF can be easily diagnosed by urinary cystatin C to creatinine ratio; UCCR. Design: Prospective cross-sectional study (Diagnostic test) Setting: Department of Medicine, Phramongkutklao Hospital, Bangkok, Thailand Method: Patients with GFR 15-59 ml/min/1.73 sq.m. scheduled for coronary angiography were enrolled. All eligible patients were studied for baseline characteristics, serum creatinine, serum cystatin C, urine creatinine and urine cystatin C at baseline, 24 and 48 hours after procedure. ARF was defined as serum creatinine rising [is more than or equal to] 0.5 mg/dl or &gt;= 25% from baseline. Results: One hundred and twenty two patients were enrolled, 115 patients completed data for analysis. ARF developed in 12 patients (10.4%). From ROC, the best diagnostic test was the maximum value of UCCR within 48 hours post procedure (AUC=0.63; 95%CI 0.46-0.80) with sensitivity of 92% and specificity of 28% at cut-off value &gt;= 0.07*10[superscript-3]. Likelihood ratio of UCCR at level of 0-0.3, 0.31-0.5, &gt; 0.5 (*10[superscript-3]) were 0.73, 1.34, 1.98 respectively. If urine cystatin C alone was evaluated as a diagnostic tool, the best diagnostic test was the percent change of urine cystatin C at 24 hours post procedure from baseline (AUC=0.81; 95%CI 0.67-0.95) with sensitivity of 70% and specificity of 67% at cut-off value &gt;= 3%. Likelihood ratio of this test at level of [is less than or equal to] 0, 0.1-100, 101-200, &gt; 200% were 0.45, 0.82, 3.64, 9.10 respectively. Conclusion: Urine cystatin C and urinary cystatin C to creatinine ratio have only fair usefulness for diagnosis of acute renal failure in patients undergoing coronary angiography.
DOI: 10.14457/cu.the.2006.1822
title: การประเมินผลกระทบต่อสิ่งแวดล้อมจากการใช้นาโนไททาเนียมไดออกไซด์

description: Degussa P-25 เป็นไททาเนียมไดออกไซด์ขนาดนาโนเมตรที่กำลังเป็นที่นิยมใช้กันอย่างแพร่หลายในปัจจุบัน โดยเฉพาะอย่างยิ่งคือ การนำ Degussa P-25 มาใช้ในกระบวนการกำจัดของเสีย ซึ่งเป็นงานวิจัยที่มีผู้สนใจศึกษาค้นคว้าเป็นเวลามากกว่า 20 ปี แล้ว โดยประสิทธิภาพในการกำจัดของเสียของ Degussa P-25 ได้รับการยอมรับในหลายงานวิจัยแล้วว่า มีประสิทธิภาพสูงเหมาะแก่การนำมาใช้ในการกำจัดของเสีย แต่ยังไม่มีงานวิจัยใดที่ทำการประเมินผลกระทบต่อสิ่งแวดล้อมที่เกิดขึ้นจากการนำ Degussa P-25 มาใช้ในการกำจัด ดังนั้นในงานวิจัยนี้จะทำการพิจารณากระบวนการกำจัดของเสียทั้งหมด 5 ชนิด คือ ก๊าซไนโตรเจนออกไซด์ ฟีนอลิกเรซิน ไนโตรเบนซีน สีย้อมเมทิลลีนบลู และสีย้อมออเรนจ์ 4 ซึ่งถือว่าเป็นสารมลพิษที่มีความเป็นพิษสูง และกำจัดได้ยากด้วยวิธีทางชีวภาพ และนิยมจำกัดโดยใช้ Degussa P-25 มาประเมินผลกระทบต่อสิ่งแวดล้อมที่เกิดขึ้น เปรียบเทียบกับกระบวนการกำจัดของเสียวิธีอื่น ๆ เพื่อที่จะบ่งชี้ ถึงแนวทางในการนำ Degussa P-25 มาใช้ในการกำจัดของเสีย โดยพิจารณาถึงประสิทธิภาพการกำจัดของเสีย และผลกระทบต่อสิ่งแวดล้อม ซึ่งจากการประเมินผลกระทบต่อสิ่งแวดล้อม โดยใช้โปรแกรมสำเร็จรูป SimaPro 6.0 ซึ่งพบว่าผลกระทบต่อสิ่งแวดล้อมที่เกิดขึ้นจากกระบวนการกำจัดของเสียจะขึ้นอยู่กับ ชนิดของเสีย ปริมาณของเสีย และวิธีการกำจัดของเสีย โดยที่กระบวนการกำจัดโดยใช้ Degussa P-25 เหมาะสมที่จะนำมาใช้ในกระบวนการกำจัดฟีนอลิกเรซิน ไนโตรเบนซีน และกำจัดสีย้อมออเรนจ์ 4 ในน้ำ เนื่องจากมีประสิทธิภาพในการกำจัดที่ดี และมีผลกระทบต่อสิ่งแวดล้อมน้อย แต่ไม่เหมาะสมที่จะนำมาใช้ในกระบวนการกำจัดก๊าซไนโตรเจนออกไซด์ และสีย้อมเมทิลลีนบลู นอกจากนี้ยังได้มีการศึกษาเพิ่มเติมเกี่ยวกับกระบวนการกำจัดฟีโนลิกเรซินที่ปนเปื้อนในน้ำ จากโรงงานอุตสาหกรรมในประเทศไทย พบว่ากระบวนการกำจัดฟีโนลิกเรซิน โดยการส่งไปเผาในเตาเผาปูนซิเมนต์ที่ใช้อยู่ในปัจจุบัน เป็นวิธีที่จะใช้ในการกำจัดฟีโนลิกเรซินที่ปนเปื้อนในน้ำที่ดี เนื่องจากมีประสิทธิภาพในการกำจัดสูง ผลกระทบต่อสิ่งแวดล้อมน้อย และมีต้นทุนในการกำจัดและการขนส่งต่ำ
DOI: 10.14457/cu.the.2006.1823
title: Diffusion of pentane isomers in silicalite-1 by molecular dynamic simulation

description: Quantum chemical calculations at the second order Moller-Plesset Perturbation (MP2) levels were performed to evaluate n-pentane/n-pentane and n-pentane/silicalite-1 interactions where several hundred configurations of the pair were generated. The silicalite-1 crystal structure was represented by a 10-T ring, in which the chemical compositions is O[10]Si[10]H[20]. The energies and corresponding coordinates of these configurations were fitted to analytical functions. Several attempts were made to get the best functions which reproduce the experimental heat of adsorption(Qst) as well as the self-diffusion coefficient (Ds). In the final form, the MP2/6-31+G(d,p) was applied and the collision constants were introduced into the ab initio fitted potential. With this newly developed approach, ratio of the atomic pairs in the molecular pair potential was nicely partitioned. The obtained function was applied for a series of molecular dynamic simulations by varying temperatures and loadings of n-pentane. The obtained structural data was interpreted in term of residence distributions where their changes were, then, described by a competition between potential fields exerted by zeolite and molecular movement. The potential fields dominate the molecular movement at low temperature and decreases when the temperature increases. In addition, the extrapolated Qst from the newly developed function of 52.28 kJ/mol is 9.39% lower than that of the experiment and change of the Ds as a function of temperatures is in good agreement with that observed experimentally.
DOI: 10.14457/cu.the.2006.1824
title: Photo-degradation of natural rubber films for natural gas application

description: Natural rubber (NR) can be degraded depending on various factors such as heat, mechanical force, chemical reaction, and light. Light is an attractive factor because it degrades NR under low temperature and pressure. In this research, the photo-degradation of NR films was carried out to investigate the effects of the light, temperature, and catalysts on the reduction of the weight-average molecular weight (Mw) and the double bonds in the NR films. The NR films, with and without catalysts, titanium dioxide (TiO[subscript 2]), and potassium persulfate (K[subscript 2]S[subscript 2]O[subscript 8]), were exposed to light from a mercury light bulb at differenct light densities and temperature. After exposure, the Mw of the NR films was analyzed using the gel permeation chromatography (GPC) method. The reduction of Mw was studied, and the Mw distribution information from the GPC was used to calculate the number of double bonds in the NR films. A kinetic model for the 1[superscript st] order reaction with random scission has been applied to this photo-degradation process. Some other physical properties of the NR films were also investigated. From this fundamental knowledge obtained, NR can probably be developed for a containment of methane hydrate, or for adsorption of gaseous fuels.
DOI: 10.14457/cu.the.2006.1825
title: The determinants affecting the enrollment of voluntary health insurance scheme in Red River Dekta region in Vietnam

description: To identify the determinants affecting the enrollment of Voluntary Health Insurance Scheme in Red River Delta Region in Vietnam, to analyze the coverage of the Health Insurance Scheme, which expected to be used as one of the means to extend the membership of this program. Logit regression model was used to identify the determinants affecting the enrollment of Voluntary Health Insurance Scheme. Descriptive statistics were applied to analyze the utilization of health care service between health insured group and health un-insured group. Data (n=2268) collected randomly from 11 provinces were used to identify the determinants affecting the enrollment of Voluntary Health Insurance Scheme in this region. The results showed that the determinants affecting the enrollment of Voluntary Health Insurance Scheme in Red River Delta Region in Vietnam were age, marital status, educational level, family size, location, consultation times and income. There was not much difference in number of visits to health care facilities between insured and un-insured groups.
DOI: 10.14457/cu.the.2006.1826
title: กรรมวิธีการสร้างฆ้องหล่อ : กรณีศึกษาช่างสำราญ นิลวิไลพันธ์

description: จากการศึกษาพบว่าฆ้องหล่อมีพัฒนาการการสร้างมาจากฆ้องตี แต่อาศัยวิธีการหล่อในวิชาช่างแทน เพื่อประหยัดเวลาในการผลิต และมีราคาถูกกว่าฆ้องตี จึงทำให้ฆ้องหล่อเป็นที่นิยมแพร่หลาย จากการศึกษากรรมวิธีการสร้างฆ้องหล่อของบ้านช่างสำราญ นิลวิไลพันธ์ พบว่าช่างสำราญ นิลวิไลพันธ์ ใช้วิธีการหล่อแบบหล่อดินในการสร้างฆ้องหล่อ โดยใช้ส่วนผสมที่สำคัญ 5 อย่าง ได้แก่ นิกเกิล สังกะสี ทองแดง อะลูมิเนียม ดีบุก มาหลอมรวมกันโดยใช้อัตราส่วนโลหะแต่ละส่วนในปริมาณที่เหมาะสม ทำให้ลูกฆ้องที่ได้จากการหล่อมีคุณภาพที่ทนทานต่อการใช้งานไม่แตกร้าวง่าย ส่วนด้านการเทียบเสียง ช่างสำราญอาศัยทักษะความชำนาญในการกลึงทำให้ฆ้องหล่อช่างสำราญ มีคุณภาพเสียงดีกว่าฆ้องหล่อโดยทั่วไป ซึ่งแตกต่างจากช่างทำฆ้องหล่อโดยทั่วไป จะใช้วิธีการขูดไปที่ลูกฆ้องแทนการกลึงเทียบเสียง ประกอบกับความพิถีพิถันในการกลึงรูปทรงภายนอก ทำให้ฆ้องหล่อของช่างสำราญมีความสวยงาม มีคุณภาพเสียงที่ดีกว่าฆ้องหล่อโดยทั่วไป กรรมวิธีการสร้างที่ส่งผลต่อคุณภาพเสียงของฆ้องหล่อคือ 1. ส่วนผสมที่ใช้ในการหล่อเป็นลูกฆ้อง 2. ขั้นตอนและวิธีการหล่อลูกฆ้อง 3. ความหนาบางของลูกฆ้องหล่อ 4. ขนาดสัดส่วนของลูกฆ้องหล่อ 5. วิธีการผูกลูกฆ้องโดยใช้หนังวัวหรือการใช้เชือก 6. ฉัตรฆ้องมีลักษณะยาว 7. ตะกั่วถ่วงเสียง 8. น้ำหนักของลูกฆ้องหล่อ 9. ร้านฆ้อง (ช่องว่างของร้านฆ้อง)
DOI: 10.14457/cu.the.2006.1827
title: Technical and scale efficiencies of province and district level hospitals in Mongolia

description: To provide the empirical evidence of inefficiencies to health policy by measuring efficiencies of province and district level hospitals in Mongolia. To reach the goal first we determined the technical and scale efficiencies of the hospitals and then determine the factors of inefficiencies. There are 21 provincial and 10 district hospitals included in this study with available data for 2003 to 2005. Data envelopment analysis (DEA) technique was used to assess technical and scale efficiencies. The DEA model was used three inputs and two outputs. Following three physical inputs were used which are number of medical doctor, number of nurse and number of hospital bed. Two outputs we consider were number of inpatient days and number of outpatient visits. To identify and evaluate factors on technical efficiency, the efficiency score for each hospital, calculated using DEA, was used as the dependent variable in regression model, we include four independent variables representing the factors impact on efficiency performance of the hospitals which are average length of stay, Per capita Health budget, Number of elderly, Urban/Rural. To identify the factors of scale efficiency, the efficiency score was used as the dependent variable in regression model; independent variables are number of medical doctor, ratio of doctor, nurse and number of hospitals bed which are can represent the size of the hospitals. The DEA models estimated for the period from 2003 to 2005 indicate average technical and scale efficiency scores were ranking from 0.559 to 1 at the provincial hospitals and 0.768 to 1 at the district hospitals. The coefficient of number of elderly has negative and significant, confirming the expectation that a high number of elderly who are living that area is negatively associated with efficiency. The coefficient of urban also has positive and significant impact on the efficiency, expecting that the efficiency performance has high in urban areas. The number of medical doctor has significant and positive association with scale efficiency other two variables which are ratio of medical doctor/nurse and hospital bed was not significant on hospital scale efficiency.
DOI: 10.14457/cu.the.2006.1828
title: Synthesis and antibacterial activities of quaternary ammonium chitosan containing aromatic moieties

description: The 52 N-octyl and N-benzyl chitosans bearing quaternary ammonium salts were successfully synthesized by either N-alkylation or N-benzylation of chitosan and then quaternization. The extent of N-substitution (ES) was influenced by the molar ratio of the aldehyde to amino group of chitosan, the reaction time and the substituent on the benzene ring. Quaternization was carried out by using either iodomethane or 3-chloro-2-hydroxypropyl trimethylammonium chloride (Quat-188). The low degree of quaternization (DQCh) of chitosan was obtained with single treatment using iodomethane. The repeated methylation with iodomethane would increase not only DQCh but also degree of O-methylation at 3-hydroxy and 6-hydroxy groups of chitosan. For quaternization using Quat-188, O-alkylation was not observed. When ES increased, DQCh decreased obviously due to less free amino group of chitosan reacting with Quat-188. Moreover, the DQCh of N-benzyl chitosans using Quat-188 was always higher than using iodomethane at the same level of ES. All quaternary ammonium salts of chitosan using Quat-188 were highly water soluble at neutral pH. Minimum inhibitory concentration (MIC) antibacterial studies of these materials were carried out on E. coli (Gram-negative) and S. aureus (Gram-positive) bacteria. All quaternized chitosan derivatives showed very low MIC values which was in the range of 8-128 g/mL against both bacteria. The quaternization of chitosan using either iodomethane or Quat-188 was also performed for comparison.
DOI: 10.14457/cu.the.2006.1829
title: Petroleum markers derived from cardanol

description: Novel markers and simple, rapid, and sensitive detection methods of the markers were developed for use in tagging petroleum fuels. The petroleum markers were derived from cardanol and fell into two categories. The first comprised a number of the azo markers synthesized by the coupling reaction of 2-nitrocardanol with aniline and its derivatives. The azo markers had good solubility in diesel fuel and gasoline and were regarded as silent markers that no color was observable in the fuel oils at a commonly used level (5 ppm). On the other hand, the markers provided clearly visible colors when reacting with the appropriate developing reagent, resulting in stable homogeneous mixtures readily applied for the qualitative and quantitative determinations of the markers in the fuel oils with a vis spectrophotometer. The developing reagent consisted of benzyltrimethylammonium hydroxide, methanol, and 1-hexanol. The second was the fluorescent marker, the coumarin derivative prepared by the condensation reaction of cardanol with ethyl acetoacetate. The fluorescent marker was added into diesel fuel and gasoline at 100 ppm. Like the azo markers, the fluorescent marker had high compatibility with the fuel oils. Fluorescence spectroscopic technique was used to perform both qualitative and quantitative measurements of the marker using a spectrofluorometer. The fluorescence spectrum of the marked diesel fuel exhibited an emission peak attributed to the marker appearing at 312 nm when excited with the ultraviolet radiation having the wavelength of 267 nm. Additionally, the fluorescence spectrum of the tagged gasoline presented an emission band belonging to the marker occurring at 333 nm under the ultraviolet light at 300 nm. For both synthetic markers, the ASTM tests indicated that the physical properties of the marked fuel oils were similar to those of the unmarked fuel oils. Furthermore, the stability of the markers in the marked fuel oils was studied and found that the markers were stable over a period of at least 3 months.
DOI: 10.14457/cu.the.2006.1830
title: Impact of Clean Food Good Taste Project on the incidence of diarrhoeal diseases in Thailand

description: Food Sanitation Division, Department of Health, Ministry of public Health is introduced public policy the Clean Food Good Taste Project (CFGT) which promote food safety and hygiene in food services in 1999.This is the retrospective observation time series study population of Thailand based on secondary data collected during 1991-2005. This study employed two models which first, analysis impact of introduction CFGT, second analysis impact of expansion CFGT to test for serial correlation in dynamic model using t-test Statistic. The purpose of this study was to study the impact trend of Clean Food Good Taste Project (CFGT) and socio-economics, environment and intervention factor on the incidence of diarrhoeal diseases in 76 provinces Thailand. The analysis was based on the trend incidence of diarrhoeal diseases before and during adoption expansions the project, the impact trend of socio-economic, environmental and intervention factors on the incidence of diarrhoeal diseases in Thailand, the impacts of project on the incidence of diarrhoeal diseases after 1999.The study outcomes were the impact trend of CFGT on the incidence rate of diarrhoeal diseases. The results showed that expansion CFGT and food habit culture proxy variable has a likely of relationship with trend impact on incidence rate of acute diarrhoeal disease. And the introduction CFGT and food habit culture proxy variable has a likely of relationship with trend impact on incidence rate of severe diarrhoeal disease. Also socio-economic, environmental and intervention factors have likely of relationship with trend impact on incidence rate of diarrhoeal diseases.
DOI: 10.14457/cu.the.2006.1831
title: Modeling demand for Thai national park ecotourism : a GIS-linked spatial dependent model for Phu Jong Na Yoi National Park, Ubon Ratchathani, Thailand

description: The objectives of this research are 3 folds (i) it is to investigate the role of GIS linked spatial dependence and other factors that affect ecotourism demand in Phu Jong Na Yoi National Park, Ubon Ratchathani, Thailand.(ii) it attempts to estimate a recreational demand model for the park by using GIS as a tool to support the hypothesis that spatial dependence the estimated conventional recreation demand for ecotourism in the park. (iii) the study measures the economic value of the use of national resources in the park to provide tourism benefits for visitors. Data were collected in 2005 and 2006 by using a designed questionnaire from a sample of 620 park visitors. Twenty five park officers were also interviewed. The results show that GIS can be used to create a distance weight to be used in estimating the Travel Cost Model. The estimate spatial autoregressive model shows validity and robustness with the significant R2 and F Values at 95% confidence interval. The estimated model is used to evaluate the economic value of the park tourism. The estimated park consumer surplus is around 56.29 baht per person or 1.89 million baht per year.
DOI: 10.14457/cu.the.2006.1832
title: Vanadium catalysts for oxidation of alcohols

description: In this thesis, some vanadium containing oxides and vanadium complexes were prepared. They are n-Bu[subscript 4]NVO[subscript 3] (A), [NBu[subscript 4]][V(cat)[subscript 3]]) (B), V-L-valine (C), V-EDTA (D), V-PCA (E), (VO)[subscript 2]P[subscript 2]O[subscript 7] (F), VO(PO[subscript 4])(H[subscript 2]O)[subscript 2] (G), VO(HPO[subscript 4])(H[subscript 2]O)[subscript 4] (H)). These were characterized by XRD, FT-IR, UV-Vis and melting point. They were used to catalyze the oxidation of alcohols at 70 ํC, 24 h using alcohol/oxidant mole ratio = 2, alcohol/catalyst mole ratio = 60. The reaction products were analyzed by GC technique. The experimental results show that all vanadium catalysts catalyze the oxidation of alcohols to aldehyde or ketone with high yield. In the case of benzyl alcohol oxidation, the product depended on the solvent used, in toluene, benzaldehyde was obtained. But in acetonitrile, the reaction showed selectivity to benzoic acid (70% selectivity). The oxidation of 1-phenylethanol yielded acetophenone while cyclohexanol gave cyclohexanone . The reactivity of alcohol demonstrated by all the catalysts is: benzyl alcohol &gt; 1- phenylethanol &gt; cyclohexanol. The reactivity order of the catalysts found in this work revealed that the vanadium complexes containing chelating ligand are better than the vanadium containing oxide catalysts, and the reactivity is comparable to the commercial V[subscript 2]O[subscript 5].
DOI: 10.14457/cu.the.2006.1834
title: The Linked GIS and groundwater model : case study of abandon landfill in Chonburi Province

description: Numerical simulation of groundwater flow and contaminant transport often involves managing large input and output data sets. Geographic Information systems (GIS) are used to store, manipulate and visualize both spatial and non-spatial data. Because of these data manipulating capabilities, GIS have been linked to different simulation models in different research areas and are commonly used for groundwater modeling. LGGM.NET is a program for linking GIS and groundwater model that is created in the Visual Basic.NET language to take full advantage of GIS capabilities. The Arc view 3.3 and Visual MODFLOW 3.0 were selected to investigate the method of integrating the GIS and groundwater model. A real contamination scenario of the sanitary landfill of the Pattaya municipality was chosen as the project area for this study. The predicted groundwater level and lead contamination were calibrated with historical data from the period 1999 through 2003 obtained from the Pollution Control Department. Statistical measures indicated a good fit between the predicted and observed concentrations. The root mean square error (RMSE) showed that errors were approximately 1.66 m for simulation of groundwater levels and 0.029 mg/L for simulation of lead transport. The advantages of linked GIS and groundwater model are represented in the application studies which resulted in the analysis of affected area of contamination using GIS analysis tools. It was found that remediation by pump-and-treat systems gave the highest treatment efficiency while the natural attenuation and vertical cutoff wall gave almost the same results.
DOI: 10.14457/cu.the.2006.1835
title: Gender development and women's status in Bangladesh

description: Bangladesh is densely populated with a population of approximately 140 million. The majority of its population is Muslim. 75% of the population lives in the rural areas and half of the total population are women. Ignorance, low status, traditional inhibitions have influenced the life of women and poverty has been detrimental to socioeconomic development. The focus of this paper is the development of women and their status. Using social development indicators with emphasis on cultural barriers, education, health and socio-economic factors data was collected for a time series trend over a period of 8 years from 1995 to 2003. The data was then analyzed to see the changes in women’s development and status in Bangladesh. Women’s participation in the labor sector and small agricultural businesses in the rural areas has brought about a change in behavior and attitude of men towards women. These changes have made an impact on women’s role in the family and society. Many NGOs have helped to influence women’s lives, socially and economically. Major contributions by them have been in the areas of micro-credit, education, health, sanitation, nutrition and environmental issues. Government policies indicate positive attitude and commitment towards empowerment, health and development. There has been and increase in literacy rates, and an increase in girls primary school enrollment. Also, improvements in women’s health were indicated by the decrease in maternal mortality ratio, and decrease in fertility rate. The economic indicators showed an increase in female paid labor force. In general, there has been considerable development of women. However, the rate of development for women is still very slow. Cultural barriers and political instability has slowed the progress of development for women. Nevertheless, the improvement evident are expected to continue in the near future.