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Level of Lead Contamination on Electrical Equipments Electronic Devices Repairmen and Working Environment in the Area of Nakhonratchasima Province, Thailand
Weerapol Wongpraphan,Adisak Singseewo,Tawatchai Thanee,Chantana Padungtod
Research Journal of Medical Sciences , 2012, DOI: 10.3923/rjmsci.2010.88.93
Abstract: A study of the electrical equipment and electronics repaired shops, where in the areas of local government of Khamsakaesang, Nonthai, Nonsoong and Khong SubDistrict, Nakhonratchasima Province, which were in the total amount of 24 repairshops 39 repairmen. Data collection has been done by doing questionnaire and inspecting the levels of blood lead contamination and environmental lead contamination with Graphite Furnace Atomic Absorption Spectrophotometer (GFAAS) found that the average level of blood lead was at 8.58 μg dL-1, which the lowest blood lead level was at 1.26 μg dL-1 and the highest blood lead level was at 25.54 μg dL-1. The repairmen, who have different education and work experience levels were statistically having different blood lead level (p<0.05), apart from that there was a found of dust with lead contamination in working areas in the average level of 173.26 g kg-1, which the lowest level was at 49.6 g kg-1 and the highest level was at 354 g kg-1, which is much higher than the specified standard of US EPA. Apparently, repairmen are in risk of health threaten from their unsafe work condition, do not use personal protective equipments, while welding lead their working environment have highly dust lead contamination and terminating hazardous in incorrect way, which cause an effect for their family member, especially childhood and environment could be contaminated directly and indirectly. Then, the related government sectors should be actively operating, solving and managing occupational health and sanitation services for this career.
The Effect of Group Participatory Learning Process on Knowledge, Attitude and Practice for Lead Contamination Prevention on Electrical Equipments and Electronic Devices Repairmen and Work Environment in the Area of Nakhonratchasima Province, Thailand
Weerapol Wongpraphan,Adisak Singseewo,Tawatchai Thanee,Chantana Padungtod
The Social Sciences , 2013, DOI: 10.3923/sscience.2010.202.207
Abstract: This research has a purpose to educate the effect of group participatory learning process on knowledge, attitude and practice for lead contamination prevention on electrical equipments and electronic devices repairmen and work environment in the area of Nakhonratchasima Province, Thailand. There were 39 volunteers as the example group in this research by the researcher producing a training plan and questionnaire relating to general information, knowledge, attitude and practice also finding a qualitative instrument in order to gather information before the training such as interview and soil powder collection at work places and sent them to laboratory to be investigated and analyzed. Furthermore, the training operation was done by the group of participatory learning process with operative occupational health with 3 steps as following; step1: Health Education, step 2: Job Safety Analysis and step 3: Evaluation of Participation. Four months operation were used in repeatedly gathering information after finished the process of informative analysis by Percentage (%), Mean (), Standard Deviation (SD) and Statistic Comparison which used t-test and F-test (One-way ANOVA). The result found that after had training programme, most of repairmen have more general and each aspects of knowledge, attitude and practice on lead contamination prevention than before taking the programme statistically significant rate of (p<0.05) and importantly, the contaminated lead level in soil powder after the training programme was less than before taking the programme statistically significant rate of (p<0.05). Effectively, the process of group participatory learning was applied in operative process of sanitary profession which making more knowledge, attitude and practice in repairmen s lead contamination prevention as well as the related government sectors should considerably put this form of training into workers health improvement action relating to lead contamination safety and must be friendly to the environment.
Synthesis and Low Thermal Characterization of Local Soil Based-Building Adobe  [PDF]
Weerapol Namboonruang
Journal of Agricultural Chemistry and Environment (JACEN) , 2015, DOI: 10.4236/jacen.2015.42B004

This work studies the mechanical properties of the soil cement brick and soil cement brick mixed with fly ash from the east of Thailand, Rayong province. The purpose is to develop the new low cost materials used in the local area of Thailand. Results show that the average of the compressive strength and the modulus of rupture (MOR) of soil cement brick mixed with Eastern Rayong fly ash are lower than those of non-fly ash soil cement brick. Also both properties values increase with increasing cured time. However, the thermal conductivity shows the decreasing trend with increasing fly ash content. By conclusion, considered by mechanical properties show that soil cement brick mixed with an Eastern Rayong fly ash can efficiently produce as the structural clay load- bearing tile.

Impact of Gastric pH and Dietary Fiber on Calcium Availability of Various Calcium Salts
Yotsanan Weerapol,Kamonrak Cheewatanakornkool,Pornsak Sriamornsak
Silpakorn University Science and Technology Journal , 2010,
Abstract: The objective of this study was to compare calcium release and ionization from commercial calcium supplements and various salts of calcium with different solubilities. The impact of pH of test fluid and dietary fiber co-administered with calcium supplement on calcium availability was also studied. Compressed tablets of six different calcium salts were prepared by direct compression. Calcium release from tablets was tested in simulated gastric fluid without pepsin (SGF, pH 1.2) or fed state simulated gastric fluid (FSSGF, pH 4.8), using USP dissolution apparatus. The ionized calcium concentration in test fluid was determined by calcium ion selective electrode. The results demonstrated that most of the formulations released calcium within 1 hour. Tablets made of higher solubility calcium salts demonstrated a faster calcium release. The calcium release from calcium hydrogen phosphate and calcium carbonate tablets in gastric fluid with higher pH showed a slower calcium release than in SGF. The dietary fiber co-administered with calcium supplement influenced the calcium availability, especially in medium with higher pH. The results suggested that most of the calcium salts could be used as calcium supplement. However, the use of calcium carbonate required an acidic environment in order to be dissolved in the gastrointestinal tract.
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