cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2007.1448
title: Synthesis of cobalt on cobalt-aluminate and its catalytic properties for carbon monoxide hydrogenation

description: The study focused on synthesis of cobalt on cobalt-aluminate catalyst in one-pot via the solvothermal process and its catalytic properties for carbon monoxide hydrogenation. The influence of conditions to synthesize cobalt on cobalt-aluminate catalyst in this study was investigated such as Co/Al molar ratios, time and temperature during synthesis, temperature of calcination, and cobalt precursors. The various samples were characterized using N[subscript 2] physisorption, XRD, SEM/EDX, TEM, TPR and H[subscript 2] chemisorption. CO hydrogenation (H[subscript 2]/CO = 10/1) was also performed to determine the overall activity and selectivity. It was found that when synthesized at 300℃, increased Co/Al molar ratios apparently resulted in increased activities, whereas the holding time during solvothermal synthesis seemed to have only little effect on the activities upon the high molar ratios of Co/Al (1.0 and 2.0). However, at low molar ratio of Co/Al (0.5), the increased holding time can result in dramatically decreased activity. The decreased temperature during solvothermal process for 2 h can result in increased activity. The study of calcination temperature such as 300, 400 and 500℃ for 1 h revealed that the sample calcined at 400℃ exhibited the highest activity among other samples. The cobalt on cobalt-aluminate catalysts apparently exhibited higher activities than that prepared from the conventional solvothermal-derived alumina-supported cobalt catalyst without any changes in product selectivity when prepared with the same amount of cobalt excess. For the study of different cobalt precursors, it revealed that the activity of CoN &gt; CoAC &gt; CoAA &gt; CoCL due to large crystallite size having fewer interactions. CoCL showed higher selectivity to C[subscript 2]-C[subscript 4].
DOI: 10.14457/cu.the.2007.1449
title: Applying multi objective micro genetic algorithm in irregular airline operation to solve flight combining and rerouting problem

description: This thesis presents the application of the Multi Objective Micro Genetic Algorithm (MOMGA) in Irregular Airline Operation for solving flight combing and rerouting problems. Performance of the application was tested against applications using first Branch and Bound Algorithms then human experts. The result denotes that MOMGA could produce varied solutions, with equal quality, as those of Branch and Bound algorithms. Also the performance of MOMGA is much better than the performance of human experts. This is because MOMGA employs the Pareto dominance based scheme in solutions deriving and the Branch and Bound algorithms was developed in order to find multiple solutions. On the other hand, the limited searching capabilities of human experts restrict finding good quality and varied solutions. However, MOMGA took a bit more time to solve the problem than the application using Branch and Bound Algorithms.
DOI: 10.14457/cu.the.2007.1450
title: Molecular markers for determining tobacco Nicotiana tabacum L. varieties

description: In Thailand, imported and local tobacco varieties have different regulations in tariff collection. However, there are major legal and technical problems on how to distinguish between the two groups of tobacco varieties. In this study, Inter-Simple Sequence Repeat (ISSR) method was introduced to study genetic relationships among totally 66 imported and local tobacco varieties grown in Thailand. Of 20 screened primers, UBC-810, UBC-813, UBC-817, and UBC-818 primers were found giving polymorphic PCR patterns and were selected to determine genetic relationships among 24 imported varieties. Although the relationships among them were not so clear from the ISSR results, most of Turkish varieties were found more closely related to each other than to Burley or Virginia varieties. Moreover, the two best ISSR primers (UBC-807 and UBC-836) generated specific PCR bands which could separate two local tobacco varieties (Chorlare 1 and Chorlare 2) from 53 imported varieties. PCR optimisations were also performed to increase PCR specificity. Genetic relationship trees based on NJ and UPGMA methods revealed only four pairs of tobacco varieties which had Bootstrap supporting-values higher than 50%, i.e. Chorlare 1 and Chorlare 2, Nison and Petkhangsink, Ya and Local Nakhon Si Thammarat, and NC37NF (Virginia) and Ky-10 (Burley). Among all 13 local tobacco varieties collected and examined, only the pair of Chorlare 1 and 2 was distantly separated from other imported varieties, suggesting their long-history of being grown in Thailand. The other 11 local varieties were found morphologically and genetically similar to some imported varieties and could have been originated from such varieties. In conclusion, although ISSR technique could not give clear relationships between tobacco varieties in this study, it would be developed to be a simple, effective molecular marker to distinguish some long-time cultivated local varieties from the imported ones.
DOI: 10.14457/cu.the.2007.1451
title: Cloning and characterization of chitobiase from Aeromonas caviae D6

description: N-acetyl-D-glucosamine (GlcNAc) has an important role for the treatment of osteoarthritis. Consequently, GlcNAc production has been studied and developed. In this research, Chitinase (chiA) and N-acetylglucosaminidase (agd97) genes from Bacillus licheniformis SK-1 and Aeromonas caviae D6 respectively were cloned and gene cassettes containing both genes were constructed. Attempts were made to co-express both genes in E. coli BL21 (DE3) and XL-1 blue by using pET-17b and chi60 promoter from Serratia sp. TU09 in the pBSSK- vector. The expression of agd97 gene from pETAgd97-ChiA in E. coli BL21 (DE3) gave the activity of 15.656 U/ml, higher than expression of pBSK60-Agd97 by chi60 promoter in E. coli XL-1 blue, which gave the activity of 0.207 U/ml. Our attempts to construct gene cassettes were unsuccessful. However, when chiA gene was placed in a reverse orientation in front of agd97 gene, the activity of agd97 increased 76 fold compared to the activity observed from chi60 promoter in E. coli XL-1 blue. Hence, the expressed E. coli BL21 (DE3) /pETAgd97-ChiA was purified using DEAE-cellulose and sephadex G-100 column chromatography. Agd97 from E. coli BL21 (DE3) was purified 2.4 fold with a 1.4% yield. The optimum pH and temperature of the purified enzyme was 6 and 45[degree Celcius], respectively. The enzyme has the highest stability over the pH rang from 6 to 10 and at temperature below 40 [degree Celcius].
DOI: 10.21227/6ksv-5t90
title: New England 39-bus model with continuous UFLS and LCFB1

description: Dynamic data for frequency control with continuous UFLS and LCFB1This dataset is supplementary material to the draft 'Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control' submitted to IEEE Transactions on Power Systems. Authors of the draft are:Changgang Li, Member, IEEE, Yue Wu, Yanli Sun, Hengxu Zhang, Member, IEEE, Yutian Liu, Senior Member, IEEE, Yilu Liu, Fellow, IEEE, and Vladimir Terzija, Fellow, IEEEThe dataset is mainly used for comparing frequency control performance with and without secondary frequency regulation when the continuous UFLS scheme is presented.The underfrequency load shedding scheme is a continuous version, named 'PUFLS' in the dataset, and the secondary frequency regulation model is 'LCFB1' from PSS/E.Original powerflow data and dynamic data are provided in the dataset with an example of New England 39-bus model.Simulation toolkit named 'pysteps' is also included in the dataset. Anyone who would like to test the case can put the pysteps folder in 'root_of_python/Lib/site-packages/', and run the test code. Python should be 32 bit version.
DOI: 10.21227/8yfh-4x04
title: New England 39-bus model with continuous UFLS and LCFB1

description: Dynamic data for frequency control with continuous UFLS and LCFB1This dataset is supplementary material to the draft 'Continuous Under-Frequency Load Shedding Scheme for Power System Adaptive Frequency Control' submitted to IEEE Transactions on Power Systems. Authors of the draft are:Changgang Li, Member, IEEE, Yue Wu, Yanli Sun, Hengxu Zhang, Member, IEEE, Yutian Liu, Senior Member, IEEE, Yilu Liu, Fellow, IEEE, and Vladimir Terzija, Fellow, IEEEThe dataset is mainly used for comparing frequency control performance with and without secondary frequency regulation when the continuous UFLS scheme is presented.The underfrequency load shedding scheme is a continuous version, named 'PUFLS' in the dataset, and the secondary frequency regulation model is 'LCFB1' from PSS/E.Original powerflow data and dynamic data are provided in the dataset with an example of New England 39-bus model.Simulation toolkit named 'pysteps' is also included in the dataset. Anyone who would like to test the case can put the pysteps folder in 'root_of_python/Lib/site-packages/', and run the test code. Python should be 32 bit version.
DOI: 10.14457/cu.the.2007.1452
title: Synthesis of low molecular weight poly(lactide-co-caprolactone) as tissue adhesives and tetracycline drug release

description: Lactide-based polymers are widely used in various biomedical applications including surgical fixation devices and controlled drug delivery system. An ideal tissue adhesive and drug release system must adhere to the tissue substrates and sustain drug throughout the wound healing process. Additionally, it should biodegrade without side effect or systematic toxicity. Ring-opening copolymerization of L-lactide and [Epsilon] -caprolactone using alcohols with different numbers of hydroxyl groups as co-initiator was prepared in the presence of Sn(Oct)[subscript 2]. Two series of low molecular weight copolymers with similar arm length and molecular weight were synthesized and characterized by [superscript 1]H NMR, GPC and DSC. Among all of the copolymers synthesized, D-sorbitol was not suitable to be used as co-initiator for copolymerization as tissue adhesive and drug release system and T[subscript g] of copolymers with similar arm length are controlled between 20-25°C. In film preparation, copolymer was incorporated to chitosan at suitable ratio (70/30, copolymer/chitosan, w/w). Blend film of copolymer using pentaerythritol as co-initiator and chitosan (CO-PTOL/CH) gave the highest adhesive property that measured by T-peel test. The tetracycline hydrochloride (TCH) release from blend film was investigated in phosphate buffer saline at 37°C. The CO-PTOL/CH (5% TCH) can prolong the release of TCH within 7 days compared with chitosan film which is consistent with swelling behavior. Furthermore, this film can release drug with high %drug release (84.08%). Therefore, it is the most suitable TCH drug release system.
DOI: 10.14457/cu.the.2007.1453
title: Preparation of copolymer of low molecular weight polylactic acid and chitosan using crosslinking agents

description: Biodegradable polymers derived from renewable resources considered as natural polymeric materials have now become increasingly scientific and commercial interest. Polylactic acid is one of such biobased polymer that exhibits many properties equivalent to or better than many petroleum-based plastics; therefore, it is suitable for a variety of applications. However, the synthesis of PLA is somewhat cumbersome. Due to its high film forming property, chitosan, a natural polymer derived from crab and shrimp shell, was used to combine with low molecular weight polylactic acid (LPLA). In this research, we studied the properties of copolymer films between LPLA and chitosan with the help of crosslinking agent and the copolymer film was prepared by solution casting technique. Glutaraldehyde (GA) could effectively reduce the swelling capacity of the copolymer films, the increased GA concentration reduced the swelling capacity but increased the brittleness of copolymer films. The film prepared by grafting lactic acid on chitosan , so called CLG3 film exhibited the lowest swelling capacity of 47.02 +- 0.46 % as well as tensile strength (MPa), Young’s modulus (MPa), and % elongation at break value at 82.83 +- 0.87 MPa, 3177.57 +- 18.11 MPa, and 4.88 +- 1.12 %, respectively. While CLG5-1.0%LPLA film prepared by copolymerization of chitosan and LPLA showed the lowest swelling capacity of 103.64 +- 1.36% as well as tensile strength (MPa), Young’s modulus (MPa), and % elongation at break value at 99.46 +- 8.59 MPa, 4146.31 +- 431.97 MPa, and 5.61 +- 1.04 %, respectively. Moreover, it was found that glycerol monostearate (GMS) affected the mechanical properties of the copolymer films, resulted in a decreased trend in the tensile strength, Young’s modulus, and elongation at break.
DOI: 10.14457/cu.the.2007.1454
title: Protein components and biological activities from fruit pulp of Momordica charantia Linn.

description: Thai bitter gourd (Momordica charantia Linn.) has been used as vegetable as well as medicine. It has been used in traditional Thai medicine as bitter tonic, antipyretic, cholagogue, antirheumatic, antheminthic and laxative. The present study aimed to characterize components and bioactivities (hemagglutination and alpha-glucosidase inhibition) of proteins from Thai bitter gourd fruit pulp. Crude protein was extracted by phosphate buffer and fractional precipitation with ammonium sulfate in early step in purification step and separated by anion-exchange column chromatography. Afterwards, the protein fractions were tested for bioactivity, hemagglutination and alpha-glucosidase inhibition. Crude protein (40U, 40B5, 40B10, 40B20, 40B30, 40B50, 40B100, 80U, 100U and 100B100) showed hemagglutinating activity with rabbit red blood cell. Highest specific hemagglutinating activity found at 40B5 (400 U/mg protein). From peptides mass mapping by MALDI-TOF MS and amino acid sequence database searching, 40B5 was similar to partial amino acid sequence of OSJNBa0084N21.4 protein from Oryza sativa Linn. alpha-Glucosidase inhibitions were found in 20U, 40B5, 40B50, 60U, 80U, 80B10, 80B20, 80B50, 100U and 100B100. 100B100 showed highest alpha-glucosidase inhibition with IC[subscript 50]The amino acid sequence from peptide mass mapping database searching from 100B100 were similar to partial amino acid sequence of hypothetical protein from Vitis vinifera Linn.
DOI: 10.14457/cu.the.2007.1456
title: Effects of bulk and surface defects of TiO[subscript 2] support on the physico-chemical properties of Co/TiO[subscript 2] catalyst VIA methanation

description: In this work, the effects of bulk and surface defects on TiO[subscript 2] upports prepared by the sol-gel method were investigated over Co/TiO[subscript 2] catalyst. The 20%wt of cobalt were impregnated onto TiO[subscript 2] having different amounts of bulk and surface defects, which were prepared from the sol-gel method by controlling the water: alkoxide molar ratios during sol-gel synthesis. The Co/TiO[subscript 2] catalysts were characterized with different techniques including XRD, N[subscript 2]-physisorption, SEM, TEM, H[subscript 2]-chemisorption, temperature-programmed reduction (TPR). It showed that the optimum amount of bulk and surface defects can result in high total H[subscript 2] chemisorption, high reducibility, low reduction temperature, and consequently high conversion for methanation of the Co/TiO[subscript 2] catalyst. This was attributed to changes in the SMSI property superimposed with the interaction between cobalt and TiO[subscript 2] support caused by impregnate cobalt onto different bulk and surface defects on TiO[subscript 2].
DOI: 10.14457/cu.the.2007.1457
title: Trapiche sapphire from some deposits in Thailand, Cambodia and Vietnam

description: The number of trapiche sapphire samples from some basaltic gem fields used in this study are eleven from Chanthaburi deposit, two from Phrae deposit and one from Kanchanaburi deposit in Thailand, eight from Pailin deposit in Cambodia, and three from Di Linh deposit in Vietnam). Most samples show three distinguishable parts, namely core, arm and growth sector. Observation under a gem microscope reveals that the core and arm are occupied mainly by thin-film fluid inclusions and usually with the combination of minute particles, short needles and small black inclusions whereas the growth sector generally contains thin-film fluid inclusions and minute particles along hexagonal growth zones. Some large mineral inclusions were observed and identified as magnetite, columbite, pyrochlore, feldspar, monazite, nepheline, zircon and calcite. Magnetite appears to be related particularly to core and arm whereas the others are observed in the arm and growth sector. Trace element analysis and mapping along the different parts of trapiche sapphires significantly indicates that Fe and Ti concentrations at core are commonly higher than those of the other parts, whereas the growth sectors and arms are not clearly different in trace compositions. However in many cases arms may yield slightly higher Fe and Ti concentrations than the growth sectors or vice versa. These variations in geochemical signatures may be related to either visible or invislble micro- to-nano-sized inclusions. Regarding to the growth of trapiche sapphire it appears that the core should have been crystallized first from a unique physical and chemical condition that allowed co-precipitation and/or incorporation of many phases before the abrupt change in the growth condition that led to the formation of the arms and growth sectors simultaneously. The arms are the place in the growth sector where thin-film or multi-phase fluid inclusions were likely to form in the direction perpendicular to the {1120} faces or along the a-axes direction in which impurities in the crystal lattice could have a tendency to follow. The growth sector mainly developed as clear blue texture with lesser inclusions. These features of trapiche sapphire are quite different from trapiche ruby that usually occurred in the subsolidus metamorphic condition. In conclusion, trapiche sapphires from basaltic deposits may have been crystallized from a high volatile peraluminous felsic melt.
DOI: 10.14457/cu.the.2007.1458
title: Effect of Ga- and Zn-modified Al[subscript 2]O[subscript 3] on the properties of Pd/Al[subscript 2]O[subscript 3] catalyst in selective acetylene hydrogenation

description: In this study, the effects of Ga- and Zn-modified Al[subscript 2]O[subscript 3] prepared by sol-gel and solvothermal methods with various Ga/Al and Zn/Al molar ratios (0, 0.1, 0.3, and 0.5) on catalytic performance of alumina supported Pd catalysts for selective hydrogenation of acetylene were investigated. It was found that catalytic performances of the Pd catalyst supported on Ga- and Zn-modified Al[subscript 2]O[subscript 3] prepared by sol-gel method were superior compared to those of Pd-supported on the unmodified Al[subscript 2]O[subscript 3]. Opposite to the catalysts prepared by sol-gel method, all the catalysts prepared by solvothermal method presented lower selectivity of ethylene than that of the unmodified catalyst except Pd/Zn0.1 Al[subscript 2]O[subscript 3] SV that showed higher selectivity. From X-ray diffraction, it was suggested that varying Ga/Al and Zn/Al ratio directly affected the crystalline phases of alumina supports. As revealed by NH[subscript 3]-TPD, modification of Al[subscript 2]O[subscript 3] supports by Ga and Zn could decrease surface acidity of Al[subscript 2]O[subscript 3] so that the catalysts exhibited lower amount of carbonaceous deposits during reaction and less over-hydrogenation of ethylene to ethane. Moreover, differences in the catalyst activity as well as ethylene selectivity of the various Pd/Al[subscript 2]O[subscript 3] catalysts may be due to the differences in (1) the interaction between Pd and the alumina support, (2) the average Pd metal particle size, and (3) acidity of the supports.
DOI: 10.14457/cu.the.2007.1459
title: Predictors of smoking cessation in Thai patients

description: Background: Treating tobacco dependence depends on numerous factors such as patient socio-demographic characteristics, types of pharmacotherapy, dosage regimens, and duration of therapy. Currently no studies have been conducted to evaluate the predictors of smoking cessation in Thai patients. Objectives: To determine the predictors and multivariate predictors model of smoking cessation in terms of 7-day point prevalence and continuous abstinence rates at 24 weeks in Thai patients. Methods: Correlational research was conducted by collecting data from medical records as prospective and retrospective fashions during October 1, 2004 to January 31, 2007 at outpatients smoking cessation clinics of Thanyarak Institute, Rajavithi Hospital and Ramathibadi Hospital. Data of 454 patients and 249 patients were used to analyze the predictors and multivariate model of smoking cessation, respectively. Results: Predictors analyzed by univariate logistic regression for higher 7-day point prevalence abstinence rates at 24 weeks were: increasing age, married/living with partner statuses, widowed/divorced/separated statuses, bachelor’s degree graduate or upper, concurrent chronic illnesses, smoked 11-20 cigarettes per day, smoked at least 11 years, one previous quit attempt, [is more than or equal to] 2 previous quit attempt, at least 7 sessions of visiting the clinician, types of pharmacotherapy and duration of using pharmacotherapy. Predictors for higher continuous abstinence rates were: all above predictors for 7-day point prevalence abstinence, except number of visiting sessions. After performing backward stepwise logistic regression procedures built multivariate logistic regression model, predictors related to 7-day point prevalence abstinence rate were: one previous quit attempt [Odds ratio (OR) = 2.92, 95%CI =1.41-6.06]; [is more than or equal to] 2 previous quit attempts (OR =3.55, 95%CI = 1.37-9.22); used one first or second line pharmacotherapies as part of treatment (OR = 4.57 , 95%CI = 1.55-13.47); used combinations of first and/or second line pharmacotherapies as part of treatment (OR = 6.41, 95%CI = 1.31-31.27). For continuous abstinence rate at 24 weeks, predictors associated with smoking cessation were: one previous quit attempt (OR =2.97, 95% CI = 1.38-6.39); [is more than equal to] 2 previous quit attempts (OR = 3.19, 95% CI = 1.18-8.56); used one of first or second line pharmacotherapies as part of treatment (OR = 4.83, 95%CI = 1.57-14.85); used combinations of first and/or second line pharmacotherapies as part of treatment (OR = 10.29, 95%CI = 2.06-51.45). Conclusions: Patients who had one and [is more than or equal to]2 previous quit attempts, attended [is more than or equal to]7 clinic visits, used one first or second line pharmacotherapies, used combinations of first and/or second line pharmacotherapies, and had longer duration of pharmacotherapy are associated with higher abstinence rates. More research is needed to determine the target patient characteristics and optimal use of pharmacotherapy for the treatment of tobacco dependence.