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Nakhon Pathom, Thailand

Chansirinukor W.,Mahidol UniversityNakhon Pathom
Journal of the Medical Association of Thailand | Year: 2015

Objective: To conduct the cross-cultural adaptation of the Functional Rating Index (FRI) and to test the reliability and validity of the Thai version of FRI (Thai FRI). Material and Method: The cross-cultural adaptation process was used to develop the Thai FRI. The two groups of patients comprised low back pain (LBP) and neck pain (NP). Each patient was asked to complete the questionnaires twice: at the first and second visits. The patients with LBP completed the Thai FRI, Roland-Morris Disability, modified Oswestry Low Back Pain Disability and multi-level Roland-Morris Disability, while the patients with NP completed the Thai FRI and Thai Neck Disability Index. Each patient was also asked to rate a Global Perceived Effect Scale at the second visit. Reliability and crosssectional construct validity of the Thai FRI were evaluated. Minimal detectable change (MDC95%) was calculated. Results: The FRI was cross-culturally adapted to Thai and the adapted version was validated. In total, 161 patients with LBP and 84 patients with NP completed the questionnaires. Cronbach’s alpha for the Thai FRI equaled 0.86 for LBP and 0.83 for NP, ICC2,1 equaled 0.82 for LBP and 0.89 for NP, correlations between the Thai FRI and other questionnaires ranged from 0.68 to 0.78 for both groups. The MDC95% equaled 2.5 for LBP and 2.3 for NP. Conclusion: The Thai FRI was developed and validated. Its measurement properties demonstrated acceptable internal consistency, good test-retest reliability and moderate to high cross-sectional construct validity. © 2015, Medical Association of Thailand. All rights reserved.

Pariyaprasert W.,Mahidol University | Piboonpocanun S.,Mahidol UniversityNakhon Pathom | Jirapongsananuruk O.,Mahidol University | Visitsunthorn N.,Mahidol University
Asian Pacific Journal of Allergy and Immunology | Year: 2015

Background: The difference of stability between raw and boiled shrimp extracts used in prick tests has never been investigated despite its potential consequences in tests development. The aim of this study was to compare the raw and boiled shrimp extracts of two species; Macrobrachium rosenbergii (freshwater shrimp) and Penaeus monodon (seawater shrimp) held at 4 ºC for different periods of time for their stability and potency in vivo by using the skin prick test (SPT) method. Methods: Raw and boiled M. rosenbergii and P. monodon extracts were prepared and stored at 4 ºC for 1, 7, 14 and 30 days. Thirty patients were pricked with raw and boiled shrimp extracts at all storage times, as well as prick to prick skin test (PTP) to fresh raw and boiled shrimps of both species. The mean wheal diameter (MWD) resulting from prick tests for all shrimp extracts was measured and compared. Results: The shrimp extracts of all storage times yielded positive skin test results in the range of 90%-100%. Raw P. monodon extracts induced larger wheals than boiled extracts at all storage times. There was no significant difference of MWD between raw and boiled M. rosenbergii extracts on day 1, 7, and 14. Significant correlations between MWD of PTP to fresh shrimps and SPT to all shrimp extracts were observed. All shrimp extracts were sterile at all storage times. Conclusions: Raw and boiled M. rosenbergii and P. monodon extracts were stable and sterile at 4 ºC for at most 30 days. SPT with these extracts induced more than 10 mm in shrimp allergy patients and the results were comparable with PTP to fresh shrimps. © 2015, Allergy and Immunology Society of Thailand. All rights reserved.

Jalayondeja W.,Mahidol UniversityNakhon Pathom | Kraingchieocharn S.,Taksin Hospital
Journal of the Medical Association of Thailand | Year: 2015

Objective: The purposes of this study were to 1) quantify trunk endurance times according to subjects’ age and sex; and 2) identify factors affecting the endurance times. Materials and Method: Endurance times of sedentary workers aged 20-49 years were determined by an extensor endurance, a flexor endurance, and right and left side bridge (trunk lateral flexor) tests. Each test was performed once in random order with a resting period of 10 minutes between tests. Results: Of 137 workers, Two-way analysis of variance indicated that age had no effect on these 4 isometric trunk endurance tests. Sex had an effect on the extensor endurance test, and right and left side bridge tests. Females had longer endurance times than males for the trunk extensor muscle, whereas males had longer endurance times than females for right and left lateral flexor trunk muscles. Low negative but significant Pearson’s correlations (r = -0.233 to -0.377, p = 0.047 to 0.001) were found between extensor endurance times vs. body weight and abdominal skinfold thickness in both sexes. Only in males, both right and left side bridge endurance times correlated with abdominal skinfold thickness (r = -0.296 and r = -0.382, respectively, p<0.05 both). Conclusion: Sex, weight and abdominal skinfold thickness factors should be considered when trunk muscle endurance is evaluated. © 2015, Medical Association of Thailand. All rights reserved.

Wongthanate J.,Mahidol UniversityNakhon Pathom | Chinnacotpong K.,Mahidol UniversityNakhon Pathom
Environmental Engineering Research | Year: 2015

Biohydrogen production from food waste via dark fermentation was conducted by using mixed culture under various environmental conditions (initial pH, initial F/M ratio, initial ferrous iron (Fe2+), and temperature condition) in batch reactor. The results revealed that the maximum hydrogen yield of 46.19 mL H2/g CODadd was achieved at the optimal conditions (initial pH 8.0, initial F/M ratio 4.0, initial iron concentration 100 mg FeSO4/L and thermophilic condition (55±1°C)). Furthermore, major volatile fatty acid (VFA) productions of butyrate (765.66 mg/L) and acetate (324.69 mg/L) were detected and COD removal efficiency was detected at 66.00%. Therefore, these optimal conditions could be recommended to operate a system. © 2015 Korean Society of Environmental Engineers.

Suvanjumrat C.,Mahidol UniversityNakhon Pathom | Aroonjarattham P.,Mahidol UniversityNakhon Pathom
Kasetsart Journal - Natural Science | Year: 2015

Open-source code software (OpenFOAM) based on computational fluid dynamics (CFD) was implemented and applied to simulate the diffusion of a jet flame. The large eddy simulation (LES) of the turbulence combustion model was written using the C++ language. The mixture fraction approach, an infinitely-fast chemistry assumption and radiative heat transfer were combined with this LES model. The finite volume method was performed to solve and simulate diffusion jet flame models under varying methane flow rates and environmental pressures. The results of the jet flame simulation comprising the percentage of maximum burning temperature, the heat release rate and oxygen from the oxygen fraction were defined to be the flame shape for validation with experiments. It was found that the flame length measured using the heat release rate from the results of simulations had the best agreement with the experiments. An average error of less than 5.84% was obtained by a comparison between the developed CFD model and the experiment when the CFD flame length was depicted by the heat release rate. © 2015, Kasetsart University. All rights reserved.

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