cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2012.605
title: ภาวะเครียดของผู้ปกครองเด็กพิการที่นำบุตรมารับบริการที่ศูนย์ การศึกษาพิเศษ ส่วนกลาง กรุงเทพมหานคร

description: การวิจัยครั้งนี้เป็นการวิจัยเชิงพรรณนา ณ ช่วงเวลาใดเวลาหนึ่ง โดยมีวัตถุประสงค์เพื่อศึกษาภาวะเครียดและปัจจัยที่เกี่ยวข้องกับภาวะเครียดของผู้ปกครองเด็กพิการที่นำบุตรมารับบริการที่ศูนย์การศึกษาพิเศษ ส่วนกลาง กรุงเทพมหานคร จำนวน 118 คน โดยใช้แบบสอบถามข้อมูลส่วนบุคคล แบบสอบถามพฤติกรรมการเผชิญความเครียด แบบสอบถามวัดแรงสนับสนุนทางสังคม และแบบสอบถามประเมินภาวะเครียดของผู้ปกครอง ทำการวิเคราะห์ความสัมพันธ์ระหว่างระดับความเครียดกับปัจจัยที่เกี่ยวข้องด้านต่างๆโดยใช้การทดสอบไคสแควร์ หลังจากนั้นทำการวิเคราะห์ความถดถอยลอจิสติกเพื่อหาปัจจัยทำนายความเครียดในระดับเครียดมากถึงเครียดมากที่สุดของผู้ปกครองเด็กพิการ โดยกำหนดนัยสำคัญทางสถิติไว้ที่ระดับน้อยกว่า 0.05 ผลการศึกษาพบว่า ผู้ปกครองเด็กพิการที่นำบุตรมารับบริการที่ศูนย์การศึกษาพิเศษ ส่วนกลาง กรุงเทพมหานคร ส่วนใหญ่เป็นเพศหญิง (ร้อยละ 88.1) มีอายุเฉลี่ย 40.7 ± 8.9 ปี ประมาณครึ่งหนึ่ง (ร้อยละ 52.6) มีความเครียดอยู่ในระดับมากถึงมากที่สุด โดยคะแนนความเครียดเฉลี่ยเท่ากับ 3.5 (จากช่วงค่าคะแนน 1 ถึง 5) และค่าเบี่ยงเบนมาตรฐานเท่ากับ 0.6 ปัจจัยที่มีความสัมพันธ์กับภาวะเครียดของผู้ปกครองเด็กพิการ อย่างมีนัยสำคัญทางสถิติ ได้แก่ รายได้ของผู้ปกครอง (p&lt;0.01) ระดับการศึกษาของผู้ปกครอง การประกอบอาชีพ การรับรู้ความรุนแรงด้านความพิการของบุตร และการสนับสนุนทางสังคม (p&lt;0.05) ผลการวิเคราะห์ความถดถอยทางลอจิสติก พบว่า ปัจจัยทำนายความเครียดในระดับเครียดมากถึงเครียดมากที่สุดของผู้ปกครองเด็กพิการ ได้แก่ ระดับการศึกษาของผู้ปกครองที่จบชั้นประถมศึกษาหรือต่ำกว่า การไม่ได้ประกอบอาชีพ รายได้ของผู้ปกครองที่ไม่พอใช้ และการรับรู้ความรุนแรงด้านความพิการของบุตร (p&lt;0.05) ซึ่งผลการศึกษาที่ได้จะเป็นข้อมูลแก่หน่วยงานที่เกี่ยวข้องเพื่อการวางแผนในการให้ความช่วยเหลือ และส่งเสริมให้ผู้ปกครองได้ตระหนักรู้จักวิธีการจัดการกับความเครียดของตนเองได้อย่างเหมาะสม ซึ่งจะส่งผลต่อสุขภาพจิตที่ดีของผู้ปกครองและการดูแลบุตรพิการได้อย่างมีประสิทธิภาพ
DOI: 10.17632/6n9pswt7vk.1
title: Data for: Prediction and Quantification of Bacterial Biofilm Detachment Using Glazier-Graner-Hogeweg Method Based Model Simulations

description: Biofilm shear-stress simulation code
DOI: 10.7910/dvn/07l7yz/tkc26w
title: Handbook_Distances_Zucker2019.dat

description: :unav
DOI: 10.14457/cu.the.2007.2122
title: Continuous ethanol production using immobilized yeast cells entrapped in loofa reinforced alginate carriers

description: In response the energy crisis, ethanol has re-emerged as an alternative to, or extender for petroleum based liquid fuels. Continuous fermentation using immobilized cell carriers offers many advantages such as higher conversion, relative ease of product separation, reuse of biocatalyst and high productivity. Therefore, in this study continuous ethanol fermentation using immobilized yeast cells (Saccharomyces cerevisiae M30) entrapped in loofa reinforced alginate was investigated. To compare productivity of alginate-loofa at sizes of 9 x 9 x 3 mm[superscript 3] and 20 x 20 x 3 mm[superscript 3], the batch fermentation was carried out in 500 ml Erlenmeyer flask at shaking frequency of 150 rpm and temperature of 33 [degree Celcius] using initial sugar concentration of 220 g/l. It was found that there were no significant differences in cell activity regarding the change of the carrier size. The continuous ethanol fermentation was studied in packed-bed reactor with various initial sugar concentrations (202, 222 and 248 g/l) and dilution rates (0.11, 0.16, 0.20 and 0.30 h[superscript -1]) of 32 ± 1 [degree Celcius]. At 222 g/l of initial sugar concentration and 0.16 h[superscript -1] of the dilution rate, the optimum of productivity was obtained (10.57 g/l h) with the ethanol concentration of 66.06 g/l. The maximum of ethanol concentration (81.29 g/l) was obtained at 222 g/l of initial sugar concentration and 0.11 h[superscript -1] of the dilution rate. The experimental result revealed that the alginate-loofa matrix was successfully used as a cell carrier in packed bed column for continuous ethanol fermentation. With favorable mechanical properties and high porous structure of the developed carrier, a fairly stable operation and high ethanol production over the course of 30 days were achieved. Based on the results of this work, subsequent studies especially in larger scale is recommended to ameliorate for industrial production.
DOI: 10.14457/cu.the.2007.2123
title: Synthesis of vitamin E glycoside by apha-glucosidase from saccharomyces cerevisiae and cyclodextrin glycosyltransferase from Paenibacillus sp. RB01

description: A novel vitamin E glycoside was synthesized by a two-step enzymatic transglycosylation system, a combination of [alpha]-glucosidase from Saccharomyces cerevisiae and cyclodextrin glycosyltransferase (CGTase) from Paenibacillus sp. RB01. 2-([alpha]-D-glucopyranosyl)methyl-2,5,7,8-tetramethylchroman-6-ol (TMG) was synthesized from 2-hydroxyl-2,5,7,8-tetramethylchroman-6-ol (TM) and maltose by [alpha]-glucosidase. TMG was then used as an acceptor to synthesize a novel vitamin E derivative by CGTase using [beta]-cyclodextrin ([beta]-CD) as a donor. A novel product was identified as [alpha]-D-glucopyranosyl-(14)-2-([alpha]-D-glucopyranosyl)methyl-2,5,7,8-tetramethylchroman-6-ol (TMG[subscript 2]) by mass spectrometry and nuclear magnetic resonance spectroscopy analysis. When 50 mM potassium phosphate buffer (pH 6.0) containing 0.5% (w/v) of TMG, 1.5% (w/v) of [beta]-CD and 100 U of CGTase was incubated at 50 [degree Celcius] for 4 hours, the percent yield of TMG[subscript 2] reached 47.2% based on the amount of TMG supplied. The solubility in water of TMG[subscript 2] was about 14 times higher than that of TMG and was more than 1 x 10[superscript 4] and 7 x 10[superscript 4] times higher than those of TM and Trolox (6-Hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), respectively. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) free-radical scavenging activity of TMG[subscript 2] was found to be nearly the same as those of TMG, TM and Trolox.
DOI: 10.14457/cu.the.2007.2124
title: Protective effect of deferiprone on hemin-induced oxidation of low and high density lipoproteins

description: Oxidative modification of low density lipoproteins (LDL) and high density lipoproteins (HDL) play a major role in the pathogenesis of atherosclerosis. The hemin, iron compound is an oxidant that can be detected in thalassemic patients at high level. This is importantly a prerequisite for the development of atherosclerosis with vascular complications in the patients. Deferiprone (L1) is an oral iron chelator used to treat the patients having excessive plasma iron. The objective of this study is to investigate the effect of L1 on hemin-induced oxidation of low and high density lipoproteins and the effect of L1 on U937 derived macrophage uptake of heminoxidized low density lipoprotein. In vitro study was conducted by adding the L1 at the concentrations of 5, 10, 50, 100, and 500 .M into the LDL and HDL prior to oxidation induction using the hemin with the incubation period of 24 h. The degree of the lipoprotein oxidation was determined by thiobarbituric acid reactive substances (TBARs) formation. The levels of alpha-tocopherol and lipid composition were measured by HPLC. The results showed that the L1 at all tested concentrations have the protective effect on the hemin-oxidized LDL and HDL by inhibition of TBARs formation approximately 50-80% and almost 100% in LDL and HDL, respectively at time 9 and 24 h of incubation. However, the L1 could not preserve the alpha-tocopherol both in hemin-oxidized LDL and HDL. In addition, the L1 at the concentration of 500 muM could protect the decrease of cholesteryl arachidonate and cholesteryl linoleate level. However, L1 did not affect macrophage uptake of hemin oxidized LDL. This study was concluded that L1 possessed an antioxidative activity both in LDL and HDL oxidation induced by hemin.
DOI: 10.5281/zenodo.3386749
title: Chronicle of Nature - Phenology of Birds of Bryansk Forest Nature Reserve

description: Birds Phenology dataset compiled in the context of Chronicle of Nature program in Bryansk Forest Nature Reserve (Russian Federation) consisting of 934 records collected during 38 years between 1971 and 2013.
description: This dataset export was created by EarthCape software platform version 18.2.7187.18599
DOI: 10.5281/zenodo.3386750
title: Chronicle of Nature - Phenology of Birds of Bryansk Forest Nature Reserve

description: Birds Phenology dataset compiled in the context of Chronicle of Nature program in Bryansk Forest Nature Reserve (Russian Federation) consisting of 934 records collected during 38 years between 1971 and 2013.
description: This dataset export was created by EarthCape software platform version 18.2.7187.18599
DOI: 10.14457/cu.the.2007.2125
title: Indoleamine 2,3-dioxygenase expression in human gingival fibroblasts

description: Indoleamine 2,3-dioxygenase (IDO) is an intracellular tryptophan-metabolizing enzyme with immunosuppressive characteristics. Periodontitis is the chronic inflammatory disease that destroys the tooth-supporting structures. Gingival fibroblasts are major cell types in periodontal tissues which play a crucial role in maintaining connective tissue integrity and regulating local inflammatory responses. The purpose of this research is to study the regulation of IDO expression in primary cultures of human gingival fibroblasts (HGF) from healthy gingival tissues. HGF cells were treated with inflammatory cytokines and mediators. IDO mRNA expression and enzymatic activity was determined by reverse transcription-polymerase chain reaction (RT-PCR) and by spectrophotometric method, respectively. It was shown that HGF cells did not constitutively express IDO. IFN-[gamma] strongly induced IDO expression in HGF cells. IL-1[beta], TNF-[alpha], as well as lipopolysaccharides (LPS) from P. gingivalis were able to induce IDO expression, however, at a lower extent. IFN-[gamma], TNF-[alpha], and P. gingivalis LPS appeared to induce IDO expression in a dose-dependent manner. Stimulation of HGF cells with combination between IFN-[gamma] and other agents resulted in increased expression of IDO, as compared to IFN-[gamma] alone. IDO activity was significantly increased in HGF treated with IFN-[gamma]. HGF cells treated with IL-1[beta], TNF-[alpha], and P. gingivalis LPS did not show significant increased in IDO activity. Combinations of IFN-[gamma] and IL-1[beta] as well as IFN-[gamma] and TNF-[alpha] significantly increased IDO activity, as compared to that of IFN-[gamma] alone. In conclusion, we showed that IDO expression and activity in HGF cells was regulated by several inflammatory cytokines and mediators. Induction of IDO expression in HGF cells by these mediators may play a role in the pathogenesis of periodontal diseases.
DOI: 10.14457/cu.the.2007.2126
title: Synthesis of nanocrystallite yttrium aluminium garnet by precipitation method

description: Yttrium aluminium garnet powder with nanocrystallite can be successfully synthesized by co-precipitation method from a mixed solution of yttrium nitrate and ammonium aluminium sulfate using ammonium hydrogen carbonate as a precipitant. Effects of yttrium-to-aluminium ratio, reaction temperature, pH of the reaction, precipitation processes and variation of calcination time on phase formation, structure and morphology of YAG powder were investigated. Generally, it was found that precipitates which were calcined for 2 h at 1200°C would completely become YAG. With the increasing calcination temperature, the secondary particles are formed by the sintering of primary particles which can be partially broken up by milling. The reverse strike process conducting at relatively low reaction temperature with the Y-to-Al molar ratio at stoichiometric ratio of 3:5 is proper to form YAG phase. When the pH is controlled at 7 during the precipitation process, it was found that the pure YAG phase without any intermediate phase occurs by the direct transformation of amorphous to YAG after calcined 900°C or higher. Furthermore, many factors of precipitation condition affect size and size distribution of the powder, including the speed of mixing, the rate of addition and the concentration of precursors. Fabrication of synthesized YAG powder was also investigated and compared with commercial YAG powder. The compacted bodies were sintered at 1650°C for 5 h in air. The relative density of the sintered specimens were in the range of 91-92 % of theoretical density.
DOI: 10.14457/cu.the.2007.2127
title: A development of the social constructivism blended learning module for enhancing reading engagement and English reading ability of upper secondary school students

description: The objectives of this study were to: 1) develop a reading instructional module, namely the Social Constructivism Blended Learning Module (SCBLM); 2) examine the effect of the Social Constructivism Blended Learning Module on Thai secondary students’ reading ability; 3) investigate the effect of Social Constructivism Blended Learning Module on Thai secondary students’ reading engagement;4) to investigate the relationship between students’ reading engagement and their reading ability after taking Social Constructivism Blended Learning Module; and 5) explore students’ collaborative learning behavior while taking Social Constructivism Blended Learning Module. Fifty-three upper-secondary Grade 11[superscript th] students at Chulalongkorn University Demonstration Secondary School, were chosen as the sample group. The study was a single group design using qualitative and quantitative methods. It took 12 weeks for data collection. The findings revealed that: 1) the high reading ability students did not significantly gain higher scores after taking the SCBLM; 2) the low reading ability students gained significantly higher scores after taking the SCBLM; 3) the SCBLM had the significant positive effect on students’ reading engagement; 4) there was a positive low correlation between students’ reading ability and their reading engagement; and 5) there was an effect of the blended learning on students’ collaborative learning behavior. The low reading ability students showed more of the social interaction online than the face-to-face learning. The study indicated that the SCBLM benefited the low reading ability students, improved their reading ability, and suited their diverse collaborative learning behavior.
DOI: 10.14457/cu.the.2007.2128
title: Recovery of platinum group metals from automobile catalytic converters

description: Platinum has played important roles in human life due to their specific physical and chemical properties. The demand of platinum was reported to be continuously increasing, especially the use in automobile catalytic converters, while natural resources of platinum becomes limited. Therefore, the study of platinum recovery from spent automobile catalytic converter, which is an important secondary resource of platinum, becomes significant. In this study, platinum recovery process consists of two stages; platinum extraction by leaching with aqua regia and then platinum separation from the solution by co-precipitation. In the platinum extraction process, influences of time and temperature were investigated to identify optimum condition for the leaching process. The result showed that the maximum platinum extraction was obtained when leaching at 90 °C for 6 hours. However, at this condition, aluminum which is the major component in catalytic converter was also highly extracted. The coexistence of aluminum in the leachate will retard the co-precipitation of platinum (IV) with iron hydroxides, which is the second stage of platinum recovery. Hence, the optimum leaching condition here was considered to be leaching at 90°C for 1 hour. In the second stage of platinum recovery, platinum co-precipitation with various metal hydroxides was selected for this study. The metal hydroxides used in this study were hydroxides of Al, Mg, Fe (II) and Fe (III), which are major components in the catalytic converter and also dissolved in the leachate. Influences of pH and precipitation time were investigated. The result showed that almost all platinum (IV) was effectively co-precipitated with iron hydroxides at pH 6 in 1 hours. The chemical state of platinum investigated by XPS showed that co-precipitated platinum was partly reduced to platinum (II) with iron (III) hydroxide and some was further reduced to metallic platinum with iron (II) hydroxide. These facts suggest that iron hydroxide is considered as an effective carrier for co-precipitation of platinum.
DOI: 10.14457/cu.the.2007.2129
title: Controlled release of lidocaine and diclofenac from chitosan particles

description: Chitosan was used for controlled release of drug models, lidocaine and diclofenac. Chitosan/surfactant/polyanion particles were prepared with polyanion as the coacervation crosslink agent. The drug loaded chitosan particles were characterized for particle size, morphology, drug loading efficiency and in vitro release, which were found dependent on the factors of chitosan concentration, drug concentration and polyanion types. the particle size of chitosan/surfactant/polyanion particles were increased with the chitosan concentration in range of 10-30 micrometers. Two different methods were used for drug loading, incubation can loaded drug more than incorporation. The maximum loading efficiencies of drug were 80% for lidocaine and 70% for diclofenac, using incubation method. The loading efficiency was significantly decreased by the increase of initial drug concentration. In vitro release study at pH 7.4 showed a release profile consisting of an initial burst in the first 30 minutes and a continuous slow release for 8 hours for both drug models.
DOI: 10.14457/cu.the.2007.2130
title: Ionic liquid extraction of metal ions by 2-aminothiophenol in 1-butyl-3-methylimidazolium hexafluorophosphate

description: The ionic liquid namely 1-butyl-3-methylimidazolium hexafluorophosphate was synthesized and characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The optimum conditions for the extraction of Ni[superscript 2+], Cu[superscript 2+], and Pb[superscript 2+], in water by liquid-liquid extraction method was investigated using the synthetic ionic liquid combined with 2-aminothiophenol ligand. The results showed that the optimum pH for the extraction of Ni[superscript 2+], and Pb[superscript 2+], were 4-6 and 5, respectively. The percentage extractions of Ni[superscript 2+], Cu[superscript 2+] and Pb[superscript 2+] were about 100, 100, and 80% when using 5 mg L[superscript -1] of metal solution and 56, 76, and 20%, when using 1.0 mM of metal solution, respectively. The extraction of Cu[superscript 2+] is independent of the pH of solution. The extraction equilibria of Ni[superscript 2+], Cu[superscript 2+] and Pb[superscript 2+] were reached within 120, 30 and 30 min. The existence of sodium, calcium, magnesium, sulphate and chloride ions did not significantly affect the extraction efficiency of all metal ions. The stoichiometries of complexes between Ni[superscript 2+], Cu[superscript 2+] and Pb[superscript 2+] and the ligand are 1:3, 1:2 and 1:2, respectively. The extracted Ni[superscript 2+] in ionic liquid phase could be back-transferred into 3% H[subscript 2]O[subscript 2] in 0.5 M HNO[subscript 3] at 20 min of contact time and the extracted Cu[superscript 2+] and Pb[superscript 2+] could be stripped with 1 M HNO[subscript 3] at the contact time of 20 min and 10 min, respectively, with the percentage stripping higher than 95 %. The extraction efficiency of all metal ions with the ligand in the ionic liquid was higher than that obtained in chloroform at the same conditions. The association constants of complexes between Ni[superscript 2+] and Pb[superscript 2+] and the ligand in ionic liquid are 5.47x10[superscript 7] and 51.1, respectively.
DOI: 10.14457/cu.the.2007.2131
title: Antifungal activity of benzoic acid and cinnamic acid derivatives against pineapple heart rot disease

description: Fifteen phytopathogenic fungi isolates were isolated from pineapple leaves showing symptoms of heart rot, collected at Cha-Am district, Phetchaburi province. All isolates were subjected to pathogenicity test on healthy suckers of pineapple. Three isolates as RM1, RK1 and Phytophthora caused heart rot disease. Based on fungal morphology and analysis of DNA sequencing, those fungi were identified as Fusarium oxysporum f. sp. vasinfectum, Lasiodiplodia theobromae and Phytophthora parasitica. The screening of antifungal activity of twelve compounds of benzoic acid and cinnamic acid derivatives at 100 ppm against three isolates was conducted. n-Butyl 4-hydroxybenzoate revealed the best activity of mycelial growth on agar plate assay against F. oxysporum, L. theobromae and P. parasitica with %inhibition of 73, 87 and 80%, respectively. n-Butyl 4-hydroxybenzoate at 250 ppm completely inhibited mycelial growth of all fungi in broth and completely inhibited zoospore germination at 100 and 250 ppm for P. parasitica and F. oxysporum, respectively. n-Butyl 4-hydroxybenzoate at 3,000 ppm completely inhibited pineapple heart rot disease caused by P. parasitica when tested by detached leaf method and as preventative of the disease on suckers in laboratory. Synergistic at EC[subscript 50] 1.4 ppm of metalaxyl and a mixture of metalaxyl and n-butyl 4-hydroxybenzoate at the ratio of 4:1 showed inhibition of mycelial growth not different from that observed from solely metalaxyl.
DOI: 10.14457/cu.the.2007.2132
title: Small scale topology of solar wind turbulence and energetic particle transport

description: The observed dropouts of solar energetic particles from impulsive solar events (i.e., the inhomogeneity and sharp gradients in particle density) indicate the partial filamentation of magnetic connection from small regions of the solar corona to Earth orbit. This can be understood in terms of trapping of field lines due to small-scale topological structures in the solar wind. We further explore how this turbulence structure should be manifest in particle observations. Using a set of numerical experiments using the two-component (2D+slab) description of magnetic turbulence, we evaluate particle trajectories using the fundamental Newton-Lorentz equations. We adapt the two-component model to a 2D Gaussian field in Cartesian geometry, and a 2D turbulent field in spherical geometry, which includes the focusing of particles. The 2D turbulent field is generated by a 2D fast Fourier transform, a valid approximation over a small angular region. The charged particles can be temporarily trapped in flux tubes and then escape due to random turbulent perturbations in the magnetic field. The overall effect is a delay in the onset of time-asymptotic transport. For the 2D turbulent field, at 1 AU our simulations of particle density integrated over time for various energies match quite closely with the magnetic field line density. That means the particles of energy &lt; 1 GeV follow the field lines very closely, so "dropout" patterns can be modeled by field line tracing (in spherical geometry) as well as particle tracing.
DOI: 10.5281/zenodo.3384791
title: Greenhouse gas and energy fluxes in a boreal peatland forest after clearcutting

description: This package contains the data used in the research article: "Greenhouse gas and energy fluxes in a boreal peatland forest after clearcutting" published in Biogeosciences journal. Changes in this version: Chamber_data.xlsx is now named Chamber_data_clearcut.xlsx. CO2 fluxes were also corrected. Added daily mean CO2, CH4 and N2O fluxes measured at the control site. Chamber_data_clearcut.xlsx contains the daily mean fluxes of CO2, CH4 and N2O measured with soil chambers at the clearcut site. Chamber_data_control.xlsx contains the daily mean fluxes of CO2, CH4 and N2O measured with soil chambers at the control site. EC_CO2_fluxes.xlsx contains the gapfilled 30-min mean CO2 fluxes (NEE) and its components (GPP and respiration). Energy_fluxes.xlsx contains the gapfilled hourly mean energy fluxes. Meteo_data.xlsx contains the daily means of the meteorological variables used in the study.