cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2006.1936
title: ผลของโครงการทันตสุขภาพโดยการแปรงฟัน และออกเยื่ยมบ้านในกลุ่มเด็กอายุ 9-18 เดือน

description: การศึกษานี้มีวัตถุประสงค์เพื่อศึกษาถึงการเปลี่ยนแปลงพฤติกรรมในการดูแลสุขภาพช่องปากและการเกิดฟันผุหลังจากเสร็จสิ้นโครงการให้ทันตสุขศึกษา โดยการแปรงฟันและการออกเยี่ยมบ้าน เป็นระยะเวลา 1 ปี ในเขตอำเภอน้ำพอง จังหวัดขอนแก่น โดยแบ่งกลุ่มการทดลองเป็นสองกลุ่มได้แก่กลุ่มควบคุมประกอบไปด้วย ตำบลน้ำพอง ตำบลบ้านขาม ตำบลบัวเงิน และตำบลคำบง จำนวน 147 คน กลุ่มทดลองประกอบไปด้วย ตำบลวังชัย ตำบลบัวใหญ่ ตำบลพังทุย และตำบลม่วงหวาน 143 คน เมื่อเสร็จสิ้นการวิจัยเหลือกลุ่มตัวอย่าง กลุ่มควบคุม 46 คน กลุ่มทดลอง 56 ทำการศึกษาโดยใช้แบบสอบถามเพื่อหาพฤติกรรมทางด้านทันตสุขภาพที่เกี่ยวข้องกับเกิดโรคฟันผุ ในเด็กปฐมวัย มีการสอนแปรงฟันร่วมกับการให้ยาสีฟันผสมฟลูออไรด์ โดยมีการกระตุ้นโดยออกเยี่ยมบ้านทุก ๆ 4 เดือน เป็นจำนวน 3 ครั้ง จนครบ 1 ปีแล้วจึงทำแบบสอบถามและตรวจฟันซ้ำ เพื่อให้ได้ค่าร้อยละปราศจากฟันผุ และค่าเฉลี่ยผุ อุด ถอน หลังจากเสร็จสิ้นการศึกษาพบว่า กลุ่มควบคุมมีค่าร้อยละปราศจากฟันผุโดยไม่นับรอยโรคขุ่นขาวเป็นฟันผุเท่ากับ 6.52 หากนับรอยโรคขุ่นขาวเป็นฟันผุ ก็จะได้ร้อยละ 6.52 ในกลุ่มทดลองมีค่าร้อยละปราศจากฟันผุโดยไม่นับรอยโรคขุ่นขาวเป็นฟันผุเท่ากับ 64.29 หากนับรอยโรคขุ่นขาวเป็นฟันผุจะได้ร้อยละ 48.21 และพบว่าค่าเฉลี่ยผุ อุด ถอนนับจำนวนซี่โดยนับรอยโรคขุ่นขาวเป็นฟันผุ ในกลุ่มทดลองมีความแตกต่างกันอย่างไม่มีนัยสำคัญทางสถิติก่อนและหลังการวิจัย โดยในกลุ่มอื่นพบความแตกต่างอย่างมีนัยสำคัญทางสถิติ และจากแบบสอบถาม พบว่าพฤติกรรมที่มีการเปลี่ยนแปลงไป คือ พฤติกรรมการดูแลรักษาความสะอาดช่องปากที่มีมากขึ้นในกลุ่มทดลองหลังเสร็จสิ้นการวิจัย ซึ่งพฤติกรรมอื่น ๆ เช่น การกินนมขวด การกินนมตอนกลางคืน การกินขนม การเติมน้ำตาลลงในขวด การศึกษาและรายได้ของครอบครัว ไม่พบความแตกต่างอย่างมีนัยสำคัญทางสถิติ
DOI: 10.14457/cu.the.2006.1937
title: Morphometrics and molecular systematics of the genus Afgekia Craib (FABACEAE)

description: Afgekia Craib is a small genus of the tribe Millettieae in the family Fabaceae. According to the recent classification system, there are three species within this genus. They are A. sericea Craib, A. mahidolae Burtt et Chermsirivathana and A. filipes (Dunn) Geesink. Afgekia sericea and A. mahidolae are morphologically similar, while A. filipes, is rather different. In addition, this species also has some characters similar to those found in its closely related genus of Afgekia, i.e. Callerya Endl.. These discrepancy leads to uncertain taxonomic status and unsuitability of species treatment in this genus. Therefore, this research aims to explore the taxonomic status of the species in the genus Afgekia based on morphological and molecular data, which obtained from morphometrics, RAPD and DNA sequencing analyses in nuclear ITS and chloroplast trnL-F IGS repectively. In morphometrics study, 29 quantitative and 1 qualitative characters were analyzed by means of Cluster Analysis and Canonical Discriminant Analysis. The result showed that at average taxonomic distance 0.76, A. sericea and A. mahidolae were placed in the same group. While A. filipes was distinctly separated into another group. From the result of Canonical Discriminant Analyses, A. sericea and A. mahidolae were placed in the same groups on canonical axis 1 and separated from A. filipes. Likewise, the results of molecular systematics from both RAPD and DNA sequencing analysis agreed with the result from morphometric study. A close genetic similarity between A. sericea and A. mahidolae was observed. These two species were sister taxon which derived from the same ancestor. In contrast, A. filipes, is not in a section of Afgekia and should not belong to this genus. The most suitable genus to place A. filipes is likely to be Callerya. However, the genus Callerya itself requires further investigation for clearer delimitation and proper definition of the genus.
DOI: 10.14457/cu.the.2006.1938
title: Characteristics and catalytic properties of supported titanocene catalyst for ethylene/1-octene copolymerization

description: In the present study, the characteristics and catalytic properties of [t-BuNSiMe₂Flu]TiMe₂/dMMAO catalyst dispersed on various supports towards ethylene/1-octene copolymerization were investigated. First, the dMMAO was impregnated onto various supports such as SiO₂, SiO₂-TiO₂, and TiO₂. Then, copolymerization of ethylene/1-octene was conducted with and without the presence of supports in different solvent mediums such as toluene and chlorobenzene. It revealed that the SiO₂-TiO₂ support exhibited the highest activity among the other supports. The high activity observed for the SiO₂-TiO₂ support can be attributed to fewer interactions between the support and dMMAO as confirmed by XPS and TGA results. Moreover, ethylene polymerization was also conducted in this study. The activities of polymerization dramatically increased with the insertion of α-olefin due to the second comonomer effect. The slightly difference in the polymerization activities were apparently found in the supported system. It can be proposed that the different solvents can possibly alter the nature of catalyst in two ways; (i) changing the interaction between the support and cocatalyst and/or (ii) changing the form of active species i.e., active ion-pair and solvent-separated ion-pair as seen in the homogeneous system. However, there was no effect with regards to activity of the solvent mediums employed for the homogeneous system in ethylene/1-octene copolymerization. It is worth noting that the Ti-complex rendered pronouncedly high incorporation of 1-octene having the triblock (OOO) and diblock (EOO) copolymers. All the obtained polymers were characterized by GPC, DSC, and ¹³C NMR to determine the polymer properties and polymer microstructure.
DOI: 10.14457/cu.the.2006.1939
title: Colorability of glued graphs

description: Let G₁ and G₂ be any two graphs. Let H₁ and H₂ be non-trivial connected subgraphs of G₁ and G₂, respectively, such that H₁ ≅ H₂ with an isomorphism ƒ, then the glued graph of G₁ and G₂ at H₁ and H₂ with respect to ƒ, denoted by G₁&lt;&gt;G₂ / H₁ ≅ H₂ is the graph that results from combining G₁ with G₂ by identifying H₁ and H₂ with respect to the isomorphism ƒ between H₁ and H₂. We investigate the results of the graph obtaining by gluing graphs of the same type where the types we are interested in are forests, trees, bipartite graphs, k-partite graphs, chordal graphs and interval graphs. Furthermore, we study properties of glued graphs involving in their colorability and edge-colorability. We give bounds of the chromatic numbers and the edge-chromatic numbers of glued graphs and also provide graphs to guarantee that each bound is the best possible.
DOI: 10.14457/cu.the.2006.1940
title: The empirical study of the model of exporter's resource-based determinants of performance

description: The purposes of this research are to propose and test the parsimonious model of the impacts of intangible and nontradable firm-specific resources on various aspects of export performance and to examine whether the assumption of resource heterogeneity holds between firms with different performance level. In this research, the focus is on firm's strategy implementation ability, purchasing capability, and export market orientation. This set of variables, allowing firms to have competitive advantage, is hypothesized to be positively related to firm export performance. The sample data was derived from questionnaires answered by 281 exporters in food processing industry. Resource-based theory serves as the theoretical foundation of this research. It suggests that superior firm performance can be explained by possession and utilization of superior firms resources. To test the hypothesis, structural equation modeling technique was employed. In general, the findings, congruent with the theoretical notion, showed that level of strategy implementation ability, and purchasing capability were significantly and positively related to all aspects of export performance measures including export sales growth, export profitability, and export customer retention. Export market orientation was found to be significantly and positively related the two export performance measures of export sales growth, and export customer retention. The significant and positive relationship between export market orientation and export profitability was, however, not found. Possibly, this could be due to the firms' priority in meeting the goals of export sales growth and retaining customers rather than trying to achieve high profitability level at the expense of the former two goals. In addition, customers may be price sensitive to the differences in price among manufacturers, making charging higher price difficult. This research also performed subgroup analysis to statistically compare level of firm resources between firms in high performance group and those in low performance group. Empirical findings revealed that firms in high performance group possessed significantly higher level of firm resources than the firms in the other group. Based on the findings, it was found that companies who treasured the importance of developing their strategy implementation ability, purchasing capability, and export market orientation would have competitive advantage and enjoy superior performance over their rivals. In addition, this research also made a comparison of performance between groups. The two grouping variables are number of export years (high vs. low experience) and number of employees (large vs. small firm). The results revealed no significant difference of performance between groups. The findings thus confirm previous conclusion that it is the difference in firm resources, rather than in experience of firm size, that explains performance differences among firms.
DOI: 10.14457/cu.the.2006.1941
title: การศึกษาเปรียบเทียบแบบจำลองหม้อแปลงไฟฟ้าสำหรับการจำลองสภาวะชั่วครู่

description: วิทยานิพนธ์ฉบับนี้ศึกษาเปรียบเทียบแบบจำลองหม้อแปลงไฟฟ้าสำหรับการจำลอง สภาวะชั่วครู่อันเนื่องมาจากเสิร์จฟ้าผ่า ซึ่งแบบจำลองหม้อแปลงที่ศึกษามี 3 แบบ คือ แบบจำลองที่ใช้องค์ประกอบร่วมตัวเก็บประจุ, แบบจำลองซึ่งร่วมผลขององค์ประกอบเชิงความถี่ต่างๆ และแบบจำลองจากการสังเคราะห์องค์ประกอบโดยกระบวนการฟิตติ่งทางเวกเตอร์ โดยมีการเปรียบเทียบข้อดี และข้อเสียของแบบจำลองหม้อแปลงแต่ละแบบ สำหรับหม้อแปลงที่ใช้เป็นต้นแบบในการสร้างแบบจำลองเป็นหม้อแปลง 1 เฟส ที่มีความแตกต่างกันจำนวน 3 ตัว โดยใช้โปรแกรม ATP/EMTP คำนวณหาแรงดันที่ส่งผ่านมาทางด้านทุติยภูมิของหม้อแปลงเมื่อได้รับแรงดัน เสิร์จทางด้านปฐมภูมิจากแบบจำลองต่างๆ แล้วนำผลที่ได้ไปเปรียบเทียบกับผลการวัด พบว่าผลจากการจำลองมีความแตกต่างจากผลการวัดจึงมีการนำเสนอวิธีการปรับปรุง แบบจำลองเพื่อให้ได้ผลที่ใกล้เคียงยิ่งขึ้น.
DOI: 10.14457/cu.the.2006.1942
title: Variants of initial clusters with /r/ among Thai first-year undergraduate students : cross-linguistic influence and the markedness theory in setting up the level of difficulty in pronunciation

description: The study aims to examine variants of initial clusters with /r/ among Thai first year undergraduate students, and to set up the level of difficulty. The theories that are used to form the hypothesis are Cross-Linguistic Influence and the Markedness Theory. The major hypothesis of this research is that clusters with Thai equivalents are assumed to be easier for learners, and the more marked clusters are likely to be more difficult. Therefore, based on the hypothesis, the level of difficulty is predicted. The data are collected from first year undergraduate students at Chulalongkorn University. The statistical method applied to prove the significant difference between the percentage of variants is the Chi-Square test. The hypotheses prove to be true to a certain extent. That is, the clusters that have the Thai equivalents are easier for learners. Moreover, the clusters that are more marked are harder to acquire than the less marked ones. The exception to the hypotheses is that the [thr] sound appears easier than expected. Thai learners can pronounce it as they can do [phr] and [khr]. In addition, the cluster /fr/ proves to be much easier than the clusters /br/ and /dr/, although non of these has Thai equivalents. Both phenomena can be explained by the sound class and binary features, and the influence of English loan words in the Thai language. That is, the clusters [thr] and /fr/ are easier for learners because in comparison with /dr/ and /br/, the number of English loan words beginning with [thr] and /fr/ is relatively high.
DOI: 10.5281/zenodo.3966446
title: Data sets v.1.1 for Perspective: SARS-CoV-2 may regulate cellular responses through depletion of specific host miRNAs

description: The list of potential (bioinformatic predictions) interactions of human miRNA with 7 coronavirus genomes that include 3 pathogenic and 4 non-pathogenic coronaviruses. (<strong>Data Set 1</strong>). <em>The HCoVs' RNA genomes of pathogenic strains were SARS-CoV-2 (NC_045512.2), SARS-CoV (NC_004718.3), MERS-CoV (NC_019843.3). </em>The non-pathogenic strains were HCoV-OC43 (KU131570.1), HCoV-229E (NC_002645.1), HCoV-HKU1 (KF686346.1), and HCoV-NL63 (NC_005831.2). These coronaviruses were tested against the set of 896 confident mature human miRNA sequences that were obtained from the miRBbase v2.21 using the RNA22 v2 microRNA target discovery tool web-server. In order to reduce the false discovery rate of the MTS predictions, the most strict parameters were applied to the default computation workflow using a specificity of 92% versus a sensitivity of 22%. <strong>Data set 2.</strong> The potential targets of miRNA that could be bound to either the pathogenic, the non-pathogenic or both groups of HCoVs. Predicted base on miRDIP database (with only top 1% of the most probable targets considered), <strong>Data set 3. </strong> Pre-miRNA sequences in the <em>SARS-CoV-2</em> RNA sequence that could potentially enter the human RNAi pathway, base on miRNAFold webserver.
DOI: 10.14457/cu.the.2006.1943
title: A study of tetratricopeptide repeat domain12 (TTC12) methylation in leukemia

description: We searched a candidate tumor suppressor gene of nasopharyngeal carcinoma (NPC) on the critical region of loss of heterozygosity on chromosome 11 q. Unexpectedly, we accidentally discovered that tetratricopeptide repeat domail (TTC12)m an NPC down regulated gene located in the LOH region, hypermethylated in leukemic cell lines. These cells included Daudi (B-lymphoblastoid line), Jurkat (acute T cell leukemia). Molt4 (acute lymphoblastic leukemia). No methylation was observed in K562 (chronic myelogenous leukemia) and those of epitherial cell lines, HN12 and Hela, were nonmethylated. Therefore, we hypothesized that the meythlation of TTC12 may be specific in leukemogenesis in vivo. To prove this hypothesis, we tested 29 acute lymphoblastic leukemia (ALL) in comparison with normal white blood cells (WBC) from 10 healthy volunteers using combined bisulfite restriction analysis (COBRA) technique. In ALL group, the results significant demonstrated hypermethylated than in normal WBC (p&lt; 0.0001), and methylation level do not depend on ALL subtypes (p&gt;0.1). The result were confirmed by cloning and sequencing. We tested TTC12 expression by RT-PCR, nonmethylated cells, K562, HN12 and Hela, expressed TTC12, whereas hypermethylated cells, Daudi, Jurkat and Molt4, did not express. The same situation has also detectable in vivo. We compared the proportion between TTC12 and GAPDH and found significant increase in expression of TTC12 in hypomethylated ALL when compared with hypermethylated cases (p&lt;0.05). In addition, we tested TTC12 methylation in 8 remission ALL, 4 T cell lymphomas and 5 stem cells. The result showed different level of methylation each groups. The methylation on TTC12 expands through over 5’UTR. Therefore, hypermethylation in TTC12 may induce leukemogenesis by inhibiting its mRNA. Although the function of TTC12 has not been identified in silico, two conserved domains have been found including the tetratricopeptide repeat (TPR) domain and the armadillo repeat (ARM) domains. TTC12 might mediate protein-protein interaction with other proteins through TPR and ARM domains to trigger some cellular process including cell cycle control. Nevertheless, this hypothesis as well as the function(s) of TTC12 should be investigated and this will provide new knowledge of cancer biology that could be applied in cancer diagnosis as well as therapeutic in the future.
DOI: 10.5281/zenodo.3966445
title: Data sets v.1.1 for Perspective: SARS-CoV-2 may regulate cellular responses through depletion of specific host miRNAs

description: The list of potential (bioinformatic predictions) interactions of human miRNA with 7 coronavirus genomes that include 3 pathogenic and 4 non-pathogenic coronaviruses. (<strong>Data Set 1</strong>). <em>The HCoVs' RNA genomes of pathogenic strains were SARS-CoV-2 (NC_045512.2), SARS-CoV (NC_004718.3), MERS-CoV (NC_019843.3). </em>The non-pathogenic strains were HCoV-OC43 (KU131570.1), HCoV-229E (NC_002645.1), HCoV-HKU1 (KF686346.1), and HCoV-NL63 (NC_005831.2). These coronaviruses were tested against the set of 896 confident mature human miRNA sequences that were obtained from the miRBbase v2.21 using the RNA22 v2 microRNA target discovery tool web-server. In order to reduce the false discovery rate of the MTS predictions, the most strict parameters were applied to the default computation workflow using a specificity of 92% versus a sensitivity of 22%. <strong>Data set 2.</strong> The potential targets of miRNA that could be bound to either the pathogenic, the non-pathogenic or both groups of HCoVs. Predicted base on miRDIP database (with only top 1% of the most probable targets considered), <strong>Data set 3. </strong> Pre-miRNA sequences in the <em>SARS-CoV-2</em> RNA sequence that could potentially enter the human RNAi pathway, base on miRNAFold webserver.
DOI: 10.14457/cu.the.2006.1944
title: Synthesis of poly(dialkylbenzalmalonate-4-vinyl ether)

description: UV screening oligomers were synthesized in this work. Two oligomers bearing dialkylbenzalmalonate moieties were synthesized from their vinylic monomers; diethylbenzalmalonate-3-vinyl ether and di(2-ethylhexyl) benzalmalonate-4-vinyl ether. Molecular weight of each oligomer was 3600 and 1900, respectively. Both oligomers exhibit UVB absorption in their absorption profiles. Photostability test indicated that the synthesized oligomers were more photostable than 2-ethylhexyl-p-methoxycinnamate (EHMC), the common UVB filter. In addition, the obtained poly(di(2-ethylhexyl)benzalmalonate-4-vinyl ether), a reddish brown oil, showed good solubility in various organic solvents and cosmetically used silicone fluid.
DOI: 10.14457/cu.the.2006.1945
title: Theory of chemisorptions of hydroxide and C1-C3 alkoxides on single-walled carbon nanotubes

description: The adsorptions of proton and hydroxide on the perfect and defect armchair (5,5) single-walled carbon nanotubes (SWCNTs) of cap-ended C[subscript 80], C[subscript 120] and open-ended C[subscript 80]H[subscript 20] and on their protonated structures with and without water models were studied using the HF, DFT and two-layered ONIOM(MO:MO) methods. The binding energies and thermodynamic properties of all the adsorptions on various types of armchair (5,5) SWCNTs were obtained at the ONIOM(B3LYP/6-31G(d):AM1) level of theory. For the adsorptions of hydroxide and C1 to C3 alkoxide ions on the perfect and defect armchair (5,5) SWCNTs of cap-ended C[subscript 80], C[subscript 120] and open-ended C[subscript 80]H[subscript 20], C[subscript 120]H[subscript 20] were studied using ONIOM(B3LYP/6-31G(d):AM1) have been found that hydroxide was adsorbed better than alkoxide for all various types of SWCNTs. In the case of C1 to C3 alkoxide ions, as the binding energies of all adsorption son various types of SWCNTs are decreased while the size of alkyl group of alkoxides are increased, the charged of alkoxide-oxygen are increased simultaneously.
DOI: 10.14457/cu.the.2006.1946
title: Separation of crude beta-carotene from palm olein by adsorption with synthetic polymer

description: The objective of this research was to investigate the suitable separation condition of crude β-carotene from palm olein and degummed palm olein using polystyrene-divinylbenzene (PSDVB) as adsorbent in batch system. The effects of adsorption time (15, 30 60 and 90 minutes), oil dilution (1:0, 1:1, 1:2 and 1:3 by wt.) and adsorption temperature (35 and 60℃) on separation of crude β-carotene from palm olein and degummed palm olein were investigated to determine the suitable condition. Results shown that equilibrium adsorption time of both palm olein and degummed palm olein are at 60 minutes. The % recovery of crude β-carotene from degummed palm olein for all experiments gave higher values than palm olein. In case of oil dilution, at each oil dilutions, % adsorption of crude β-carotene increased with an increase of time until it was nearly constant at 60 minutes. The more oil was diluted, the higher % adsorption and % recovery were clearly obtained. Comparison of % adsorption and % recovery at 60 minutes from palm olein and degummed palm olein at different oil dilution, there were not significantly different from each other. % Desorption decreased as oil dilution increased. In case of adsorption temperature we found that the higher adsorption temperature, the higher % adsorption and % recovery were obtained. The results also showed that % recovery increased as adsorption temperature increased and there is not significantly different of % recovery between palm olein and degummed palm olein. % Recovery at 60℃ and 60 minutes were 28.67 % for palm olein and 28.30 % for degummed palm olein. For our work, we concluded in term of amount of β-carotene recover that the suitable condition was at 60℃ adsorption temperature for 60 minutes. Non diluted palm olein (in stead of degummed palm olein) is recommended.
DOI: 10.14457/cu.the.2006.1947
title: Adsorptions of methane and ethane molecules on silanol covered silicalite-1 (010) surface : AB initio fitted potential

description: The interaction profiles between guest molecules, methane and ethane, and the silanol covered (010) silicalite-1 surface have been investigated using quantum ab initio, ONIOM (MP2/6-31G(d):HF/6-31G(d)) method including the correction due to the basis set super position error (BSSE). The silicalite-1 (010) surface, which perpendicular to the straight channel was selected and cut from an idealized MFI crystal lattice. The silanol groups on the surface were generated by adding hydrogen atoms to the broken -Si-O- bonds. The ONIOM energy data were fitted to an analytical function. Quality of the fitted function was, then, examined. The energetic data obtained from the two sources, ONIOM and fitted function, are in good agreement for both methane/silicalite-1 and ethane/silicalite-1 systems. It was also found that the optimal path for guest molecule to enter the straight channel is that at the center of the channel. The optimal orientation for methane is to point one H atom at the center and perpendicular to the surface leading to the binding energy of -5.75 kJ/mol. The corresponding energy for ethane is -10.92 kJ/mol in the configuration where the C-C bond points toward and perpendicular to the surface. The fitted potential function was examined by Thompho’s Ph.D. thesis using molecular dynamics (MD) simulations in order to validate the fitted functions, Reliability of the functions was clearly yielded.
DOI: 10.5281/zenodo.3962683
title: Modeling Metabolic Pathways as Bags (with Augmentation)

description: We include samples of various data types used in hallamlab/cbt