Papers by RJAS Rangsit Journal of Arts and Sciences
Journal of Current Science and Technology, 2019
Curcumin (C 21 H 20 O 6) crystals were obtained from attempts to cocrystallize curcumin with amin... more Curcumin (C 21 H 20 O 6) crystals were obtained from attempts to cocrystallize curcumin with amino acid in mixed ethanol/methanol solvent. The curcumin structure, solved and refined by single crystal X-ray diffraction, exists in the enol form. Analysis of the electron density demonstrates nonstatistical disorder of the positions for the enol proton forming a strong hydrogen bond stabilizing the enol form within the curcumin molecule. Analysis of the intermolecular packing of the molecules shows that the crystal structure is assembled via two strong supramolecular OHO interactions with distances of 2.4696(19)-3.028(2) Å and a weak CHO hydrogen bond, distance of 4.046(3) Å. The hydrogen bond graph set notation was assigned (36) pattern. Hirshfeld surface analysis indicates that the curcumin crystal structure is stabilized by the weak hydrogen bonds. Crystal Data: C 21 H 20 O 6 (M r = 368.37 Daltons: monoclinic, space group P2/n (No. 13), a = 12.6956(3) Å, b = 7.2093(2) Å, c = 19.9362(5) Å, β = 95.276(2)°, V = 1816.96(8) Å 3 , Z = 4.
Journal of Current Science and Technology, 2019
Rangsit University, 2019
In order to evaluate neck/shoulder muscle function in asymptomatic and symptomatic office workers... more In order to evaluate neck/shoulder muscle function in asymptomatic and symptomatic office workers, it is necessary to develop clinical tests that can be applied in the clinical settings without using complicated instruments and the workers can be tolerate for the resistance. However, there was a lack of evidence in the reliability of isometric maximal strength by using the method of hand-held dynamometer (HHD) specifically in the female office workers. The objective of this study was to determine the intra-and inter-tester reliability of neck/shoulder strength measurement using a HHD among asymptomatic and symptomatic office workers. A HHD was used to evaluate neck and shoulder strength in 15 asymptomatic and 15 symptomatic office workers. The maximal isometric strength was tested in cervical flexor, extensor, and lateral flexor; and the right shoulder muscles as upper trapezius, lower trapezius and anterior deltoid, using both hands to apply isometric resistance for 5 seconds for each. The test was taken twice for 3-7 days. The maximal force of 3 trials for each test position was used for statistical analysis. The intraclass correlation coefficients (ICCs) for intra-tester reliability (ICC3, 1) showed moderate to high reliability ranging from 0.70 to 0.94 for all test directions from trial 1 to trial 2. High inter-tester reliability (ICC2, 1) between 2 assessors with intraclass correlation coefficient (ICC), ranging from 0.84 to 0.96. The result indicated that a HHD is a reliable tool for assessing the maximal isometric test of the neck and shoulder muscles in office workers with and without neck/shoulder symptoms.
Rangsit University, 2019
We prepared Pt/Co3O4-CeO2 catalyst from pulverized cerium oxide, and evaluated the catalytic oxid... more We prepared Pt/Co3O4-CeO2 catalyst from pulverized cerium oxide, and evaluated the catalytic oxidation activity for toluene. Pulverization in a ball mill reduced the median diameter of the cerium oxide particles from 23.3 μm to 0.415 μm. Although the oxidation temperature of toluene hardly changed, even with pulverization of the cerium oxide, the deposition of carbon on the catalyst surface was reduced. The dispersibility of platinum on the surface after pulverization did not differ significantly from the case without pulverization. However, the pulverization increased the total external surface area of the cerium oxide particles from 0.66 m 2 g-1 to 16.7 m 2 g-1 , and increased the contact area between the coke deposited on the surface and the cerium oxide, which influences soot combustion. Consequently, it is thought that the coke, which is unburned carbon like soot, became more oxidizable on the pulverized cerium oxide.
Rangsit University, 2019
This paper presents the method for producing natural rubber powder from natural rubber latex by a... more This paper presents the method for producing natural rubber powder from natural rubber latex by a spray drying process under hot gas jet generated from a pulse combustor. The pulse combustor is valveless Helmholtz type, having single tailpipe and single air inlet. In the experiments, the flow rate of LPG fuel was fixed at 29 l/min. The rubber latex was sprayed from an air spray nozzle into the drying chamber. The latex droplets were heated by hot gas jet and dried in a chamber. The temperature of the hot gas jet in the chamber inlet was about 180 o C and the chamber outlet temperature was about 80 o C. The latex dispersion was spray-dried to obtain rubber particles. After the drying process, the morphology and particle size of natural rubber powders were analyzed by scanning electronic microscopy (SEM) and electron micro analyzer, respectively. The range of particle size was from approximately 50 μm to 300 μm.
Rangsit University, 2019
Hirsutinolide series/sesquiterpene lactones from Vernonia cinerea, were investigated for cytotoxi... more Hirsutinolide series/sesquiterpene lactones from Vernonia cinerea, were investigated for cytotoxic effects and induction of the apoptotic activity on human colorectal cancer cells (COLO 205). The results showed that hirsutinolide series significantly inhibited cell viability of COLO 205 with IC50 less than 1.5 μM. Flow cytometric analysis indicated that hirsutinolide series (compounds 7, 10, 11, and 22) inhibited DNA synthesis as evidenced by a decline of DNA content in S, G2/M, and G0/G1 phases of the cell cycle. Furthermore, hirsutinolide series provided anticancer activity by inducing apoptosis on COLO 205 cells through the downregulation of anti-apoptotic genes; Bcl-2 and Bcl-xL.
![Research paper thumbnail of Copper (II) adsorption property of 1D coordination polymer [Cu2(H2O)(bipy)2(tp)2] (bipy = 2,2'-bipyridine, tp = terepthalate) after acid treatment](https://attachments.academia-assets.com/60436045/thumbnails/1.jpg)
Rangsit University, 2019
A deep-blue crystal of terepthalato-bridged copper (II) coordination polymer (CP), [Cu2(H2O)(bipy... more A deep-blue crystal of terepthalato-bridged copper (II) coordination polymer (CP), [Cu2(H2O)(bipy)2(tp)2] (1) was synthesized using hydrothermal reactions of Cu(OAc)2·H2O, terephthalic acid (H2tp), 2,2-bipyridine (bipy), at pH 8.45 in NH4OH. Single crystal X-ray diffraction analysis at room temperature revealed that complex 1 crystallizes in monoclinic space group P21/c with unit cell parameter a = 12.19720(10) Å, b = 14.78360(10) Å, c = 11.25080(10) Å, = 91.5460(10)°, V = 2027.99(3) Å 3 , and Z = 4. Complex 1 shows a one-dimensional zigzag chain along the [001] direction constructed by the tp 2− ligand linked to adjacent Cu 2+ ions through the carboxylate groups, while the bipy acts as bidentate chelating ligand. Classical OH•••O hydrogen bonds are observed. The synthesized product was acid-treated via immersion in 1%v/v HNO3, and within minute white crystals with retained morphology was obtained. Subsequently, the white acid-treated crystals were tested for their Cu 2+ adsorption. Cu 2+ adsorption of the white acid-treated crystals was fast and high. Adsorption as high as 214 mg Cu 2+ /g adsorbent can be obtained from material prepared from acid treated of 1D polymeric chain.
Rangsit University, 2019
The aims of this study are: 1) to examine food sanitation and safety by assessing food hazards, a... more The aims of this study are: 1) to examine food sanitation and safety by assessing food hazards, and 2) to recommend guidelines for the reduction of food hazards in local restaurants in Chiang Rai province in northern Thailand. Forty-four local restaurants were included in the target group of this study. The methodology consists of the assessment of physical hazards using a checklist. To assess the chemical hazards, five types of test-kits including a borax, a formalin, a salicylic acid, a sodium hydrosulfite, and a pesticide or MJPK test-kit were used. Moreover, biological hazards were assessed using the most probable number or MPN method. The results show that there were not any physical or chemical hazards in their food. By contrast, E.coli was detected at twenty restaurants in Chiang Rai. Therefore, Good Manufacturing Practices (GMPs) should be widely promoted to encourage a high level of food sanitation and safety in order to decrease several food hazards, especially biological contamination. Furthermore, non-smoking areas should be designated and fire-prevention equipment should be installed in these restaurants.
Rangsit University, 2019
Gamma alumina (-alumina) nanoparticles were synthesized successfully by the calcination of alumi... more Gamma alumina (-alumina) nanoparticles were synthesized successfully by the calcination of aluminum hydroxide obtained from aluminum scrap using the control precipitation method. The effective parameters, including solution pH, temperature and time of aging, were optimized by response surface methodology (RSM) based on a central composite design to obtain -alumina nanoparticles with a high-surface area. The optimum conditions for -alumina synthesis were pH 6.5 with an aging temperature of 75 °C, an aging time of 8 h, and subsequent calcination at 550 °C. The synthetic material was characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and the N 2 adsorption-desorption technique. The results showed that the -alumina nanoparticles had an average particle size of 21.18 nm, and a BET surface area of 283 m 2 /g was obtained from inexpensive raw materials. The synthetic -alumina was examined for the adsorption of acid dye from aqueous solution and the isotherms were determined. RSM was also applied to evaluate the effect of experimental variables and their interaction in achieving the optimum conditions for acid dye removal. The adsorption behavior of acid yellow on -alumina nanoparticles was well explained by Langmuir isotherm model. The maximum adsorption capacity for the removal of acid yellow was found to be 125 mg/g.
Rangsit University, 2019
Millions of people in Thailand and throughout the world recently witnessed by means of television... more Millions of people in Thailand and throughout the world recently witnessed by means of television an ancient rite: the coronation of a king. It was splendid, historic and full of symbolism-symbols which represent the duties and obligations of kings. This Editor's Note reviews the significance of this auspicious event but draws attention to the duties of citizens, particularly parents, and teachers, and, those among us who have received special training in professional fields of service. Coronation rites and ceremonies spell out, in a very public way, the obligations and duties of a king (or a president) as head of state. Such rites often include re-enactments of significant events in a country's history. (Bone, A., 2016). Confucius. It was Confucius who argued that rituals had the power to solidify human social bonds. And, that participation in rituals, particularly by the elite, can help to unify a nation. He also stressed the importance of correctness in social relationships, and the strict observance of formalities in the performance of certain rites (Richey, n.d.). Ashoka (304-232 B.C.E.). Ashoka, was an early convert to Buddhism and a key figure in the transition of Buddhism from a local religion to a major force that transformed Asia, according to a number of historians. He was emperor of the Indian subcontinent for 41 years. He promoted wildlife protection, banning hunting for sport, built universities, hospitals for people and animals, and constructed irrigation systems for trade and agriculture (Voss, 2016). Actually, Buddhist scholars have a set of guidelines for kings. They are called the ten duties of a king, rajadhamma. Some historians believe that these 10 duties were taught by the Buddha over two thousand years ago, and that they are as valid now as they were many centuries ago. (Buddhist Broadcasting Network, 2019). 1. Dana-charity-having a willingness to sacrifice one's interests for the people. 2. Sila-morality-maintaining a high moral order in one's personal conduct. 3. Pariccaga-altruism-being generous towards the people, avoiding selfishness. 4. Ajjava-honesty-fulfilling one's duties with loyalty and integrity. 5. Maddava-gentleness-being kind and gentle, never arrogant. 6. Tapa-self-control-to perform one's duties with dispassion. 7. Akkhoda-non-anger-remaining calm in the midst of confusion. 8. Avihimsa-non-violence-being non-violent, not persecuting the people. 9. Khanti-forbearance-practicing patience in one's duties. 10. Avirodhana-uprightness-respecting public opinion, promoting harmony. In the first eight years of his reign, Ashoka was a much honoured warrior general during which time he expanded the Indian empire. After one particular campaign, he visited the sight of his army's victory, and
Rangsit University, 2018
Background and significance: Trans-arterial chemoembolization becomes a treatment of choice among... more Background and significance: Trans-arterial chemoembolization becomes a treatment of choice among liver
cancer patients. Normally, patients are anxious and terrified to the procedure. This is due to the incomprehension and lack
of knowledge. Aim of the study: Investigators would like to compare the effectiveness of video and handbook learning
media. Method: A purposive sampling of 80 volunteered, literate, liver cancer patients, aged >18, was enrolled in the study.
After 40-item pretest, participants were randomized equally into two groups. The experimental group watched the video,
while the control group studied the handbook. Both materials contained the same didactic information. Consequently, the
post-test was performed immediately. Moreover, the final test was implemented within 45-60 days. Pre and post-test scores
as well as pre and final test scores were calculated for the relative growth scores and the knowledge retention scores
respectively. Data were expressed as mean ± standard deviation, and analyzed by Independent t-test, Exact probability and
Mann-Whitney U test. Findings: The demographic characteristics were insignificant differences between the two groups.
However, the study illustrated that the video had higher relative growth and retention of knowledge scores than that of the
handbook significantly. Conclusion: The video was more effective than the handbook in promoting health education on
Trans-arterial chemoembolization. Implications for nursing practice: video learning media was an effective educational tool
to improve memorization. In addition, the knowledge retention score yielded the best prediction on academic gains.
Keywords: handbook learning media, health education, knowledge retention, video learning media
Rangsit University, 2018
Falls are a major cause of morbidity and mortality in older persons, and the consequences of fall... more Falls are a major cause of morbidity and mortality in older persons, and the consequences of fall may impact an individual severely. Although prevalence rates for falls in older population have been established in Thailand, most of them were carried out in hospital. Chiang Rai is one of the provinces with highest older population in the northern part of Thailand, particularly in rural areas. However, no prevalence study of falls has been available, especially in primary care center. Hence, this study estimated 12-month prevalence rate of fall risk, and identified risk factors of fall risk in older population at Pa-Teung sub-district, Mae-Chan district, Chiang Rai. A cross sectional study was carried out in 11 villages and total 340 persons aged ≥ 60 years were systematic randomly selected. Fall risk was assessed by using Time up and Go (TUG). This study showed that the average age of participants was 69+6 years. The 12-month prevalence of fall risk was 12.6% (95% CI 9.5-16.6). Binary logistic regression revealed that potential factor of fall risk was age group 70-79 years old (OR = 4.39, 95% CI 2.14, 9.02, P=0.001). This study highlights that there are a number of older people with fall risk at primary care centers in rural areas of Chiang Rai. In particular, aged group between 70 and 79 years old should be concerned as a priority group of fall risk.
Rangsit University, 2018
This research presents the identification of producer gas resulting from the conversion of a give... more This research presents the identification of producer gas resulting from the conversion of a given type of biomass in a downdraft gasifier, the use of a neural network (NN) to predict the identity for a given biomass type and the comparison of the NN prediction to measured results of biomass fuel conversions. Each type of biomass has different characteristics which affect the composition of the producer gas and thus its effective energy content. This research predicts the composition of the producer gas from the characteristics of the biomass by creating a mathematical model using a neural network. The model is then used to run simulations which are compared to actual measured values from experiments and then the accuracy of the simulations are verified with Simulink/MATLAB. The results show that the simulation predicts the CO content of producer gas with an average error of 1.73%, 7.01% for H 2 , and 1.58% for CH 4. The simulation predicts the higher heating value with an average error of 0.73% and a lower heating value with an average error of 0.81%.
Rangsit University, 2018
The examinee personal verification is very important task in every examination. Although many edu... more The examinee personal verification is very important task in every examination. Although many education institutes have information system to support their task, there is no information system to support the examinee personal verification methodology. The main problem of examinee personal verification is how to ensure that the examinee is the right person. This paper presents how to use biometric technology in examinee personal verification by developing the software design model based on IEEE Software Design Descriptions. The main purpose of this paper is to create the software design model for software developers to use as framework to develop the biometric examinee personal verification system for any education institute. Our software design model is based on IEEE Standard for Information Technology-Systems Design-Software Design Descriptions (IEEE-SDD) by presenting twelve different viewpoints.
Rangsit University, 2018
Biogas has been found as the alternative renewable resource to replace fossil fuels, which contai... more Biogas has been found as the alternative renewable resource to replace fossil fuels, which contains 53-70% of CH 4 , 30-50% of CO 2 and other gases. Water scrubber is the most popular technique for biogas cleaning due to economic and also high purification output. This research aimed to investigate biogas upgrading by using microbubble that generated from a developed swirl nozzle. The water flow rates were controlled of 10, 15, 20, 25, 30 and 35 litre/min. The bubble varied in the range of 50.44-116.04 µm for entire experiment. CO 2 removal from pilot scale by entrapping CO 2 reached 83.06%, and CH 4 was recovered to 96.26% at conditions of 35 litre/min of water, 0.1 litre/min of constant gas flow rate. Finally, flow characteristics form simulation result inside reactor including with nozzle part were discussed to understand flow phenomena.
Rangsit University, 2018
It is known that Thailand has been using natural gas as its main fuel in producing electricity at... more It is known that Thailand has been using natural gas as its main fuel in producing electricity at the present time. A number of these reserved natural gases are likely to be dramatically decreased in the future. However, Thailand also has abundance of another fuel resource, which are the lignite coals that are considered lower quality but cheaper compared to other fuel resources. Even though lignite is not fully accepted and has bad reputation for its harmful impact on environment is being developed and used with clean coal technology in order to lower the pollution from the coal. This aims to study characteristics of bubbles produced by three different bubble generators: porous stones, ejector nozzle and pressure tank. Moreover, this study also investigates the result of coal cleaning by using the generated bubbles in order to carry the coal to the water surface. The result shows that the size of bubbles produced by porous material are appeared larger compares to the bubbles produced by the ejector nozzle combined with pressure tank are smallest. For the coal cleaning, it is found that the bubbles from the ejector nozzle combined with pressure tank can carry more coal powder to the water surface. In addition, flotation time also affects to remove sulfur and ash of the coal. The removal of sulfur content and ash content in coals, decreased with increasing flotation time. In addition, the fixed carbon and gross calorific value of the coals were increased with increasing flotation time.
Rangsit University , 2018
Rangsit University, 2018
Deactivated ball-type Co 3 O 4-CeO 2 catalyst used for odor elimination in an offset printing fac... more Deactivated ball-type Co 3 O 4-CeO 2 catalyst used for odor elimination in an offset printing factory for a year was regenerated by soaking in water. The reaction yield of ethyl acetate to carbon dioxide increased, on regeneration, to 98% from 82% (used catalyst) at 350 ○ C (new catalyst: almost 100%). Sulfur was found in the water (eluate) after soaking the deactivated catalyst; and it is suggested that sulfur, which generally works as a catalyst poison, is dissolved in the water, resulting in recovery of catalyst activity. In the case of ball-type Pt/Al 2 O 3 catalyst, little catalyst deactivation was observed after a year of usage at 350 ○ C; and it is considered that, in this case, the blocking of active sites is suppressed, since the sulfur adsorbed on platinum is easily burned and converted into gas.
Rangsit University, 2018
Lactobacillus spp. is one of the lactic acid bacteria with probiotic properties. This strain play... more Lactobacillus spp. is one of the lactic acid bacteria with probiotic properties. This strain plays important roles for many fermented foods. Lactobacillus pentosus GP6 isolated from fermented ground pork showed antimicrobial potential against bacterial gastrointestinal pathogens, including Enteropathogenic Escherichia coli (EPEC) DMST 30546, Pseudomonas aeruginosa, Salmonella Typhimurium and Shigella sonnei. It was susceptible to all tested antibiotics except vancomycin. L. pentosus GP6 survived in low pH and was tolerant to bile salt. It exhibited good growth in simulated gastric and intestinal tracts. This strain had a good autoaggregation and a high surface hydrophobicity. Moreover, this lactobacillus showed coaggregation with EPEC DMST 30546 to affect its adhesion and colonization. L. pentosus GP6 showed high adhesion ability to Caco-2 cell line and the adhesion of EPEC DMST 30546 to this cell line was decreased in the presence of this lactobacillus. Overall, the results indicated L. pentosus GP6 is a potential probiotic for dietary supplement formulations.
Rangsit University, 2018
This paper aims to identify, assess and offer management guideline of operational risk on informa... more This paper aims to identify, assess and offer management guideline of operational risk on information and communication technology (ICT) under ISO/IEC 27001:2013 standard using Mamdani fuzzy model-based management. Qualitative research methodology and research standard questionnaires were employed for collecting data from 21 surveyees related to ICT fields in January 2017. The fuzzy logic-based risk matrices were used in risk assessment. The uncertainties and imprecision of the complex risk management are better described by fuzzy rule-based reasoning. From the case study, the results show that the risk on ICT has high levels in five criteria including security policy for information, information security related to personnel, physical and environmental security, management in information security and organizational continuity management. Guidelines on risk management are also introduced as an integral part of good management.
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Papers by RJAS Rangsit Journal of Arts and Sciences
cancer patients. Normally, patients are anxious and terrified to the procedure. This is due to the incomprehension and lack
of knowledge. Aim of the study: Investigators would like to compare the effectiveness of video and handbook learning
media. Method: A purposive sampling of 80 volunteered, literate, liver cancer patients, aged >18, was enrolled in the study.
After 40-item pretest, participants were randomized equally into two groups. The experimental group watched the video,
while the control group studied the handbook. Both materials contained the same didactic information. Consequently, the
post-test was performed immediately. Moreover, the final test was implemented within 45-60 days. Pre and post-test scores
as well as pre and final test scores were calculated for the relative growth scores and the knowledge retention scores
respectively. Data were expressed as mean ± standard deviation, and analyzed by Independent t-test, Exact probability and
Mann-Whitney U test. Findings: The demographic characteristics were insignificant differences between the two groups.
However, the study illustrated that the video had higher relative growth and retention of knowledge scores than that of the
handbook significantly. Conclusion: The video was more effective than the handbook in promoting health education on
Trans-arterial chemoembolization. Implications for nursing practice: video learning media was an effective educational tool
to improve memorization. In addition, the knowledge retention score yielded the best prediction on academic gains.
Keywords: handbook learning media, health education, knowledge retention, video learning media
cancer patients. Normally, patients are anxious and terrified to the procedure. This is due to the incomprehension and lack
of knowledge. Aim of the study: Investigators would like to compare the effectiveness of video and handbook learning
media. Method: A purposive sampling of 80 volunteered, literate, liver cancer patients, aged >18, was enrolled in the study.
After 40-item pretest, participants were randomized equally into two groups. The experimental group watched the video,
while the control group studied the handbook. Both materials contained the same didactic information. Consequently, the
post-test was performed immediately. Moreover, the final test was implemented within 45-60 days. Pre and post-test scores
as well as pre and final test scores were calculated for the relative growth scores and the knowledge retention scores
respectively. Data were expressed as mean ± standard deviation, and analyzed by Independent t-test, Exact probability and
Mann-Whitney U test. Findings: The demographic characteristics were insignificant differences between the two groups.
However, the study illustrated that the video had higher relative growth and retention of knowledge scores than that of the
handbook significantly. Conclusion: The video was more effective than the handbook in promoting health education on
Trans-arterial chemoembolization. Implications for nursing practice: video learning media was an effective educational tool
to improve memorization. In addition, the knowledge retention score yielded the best prediction on academic gains.
Keywords: handbook learning media, health education, knowledge retention, video learning media