PSRU Journal of Science and Technology 2020-12-28T09:40:25+07:00 Asst. Prof. Dr. Rapiphun Janmanee Open Journal Systems <p>&nbsp; &nbsp; &nbsp; &nbsp; PSRU Journal of Science and Technology is a peer-reviewed journal of Faculty of Science and Technology, Pibulsongkram Rajabhat University. The journal devoted to publish of&nbsp; original research article and review article in science and technology. The journal is indexed in TCI Tier 2.</p> <p>Three issues are published a year (January-April, June-August and September-December).</p> <p>Online ISSN 2672-9741</p> <p>Print ISSN 2465-5112</p> บทบรรณาธิการ 2020-12-28T09:40:19+07:00 <p>บทบรรณาธิการ</p> 2020-12-18T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology สารบัญ 2020-12-28T09:40:20+07:00 <p>สารบัญ</p> 2020-12-18T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology EFFICIENCY ENHANCEMENT OF WIRELESS POWER TRANSFER SYSTEM WITH METAMATERIALS 2020-12-28T09:40:20+07:00 Chaiyong Soemphol Niwat Angkawisittpan <p>The wireless power transfer system is considered to be a new technology in the future that will help facilitate for human daily life. This paper presents a study on the applications of metamaterials for enhancing the efficiency of wireless power transfer systems. The basic principles of wireless power transfer system, metamaterials and its applications for wireless power transfer system are proposed. The results of the literature review show that metamaterials can be used to significantly increase the efficiency of the wireless power transfer systems.</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology ASSESSING THE CARBON STORAGE POTENTIAL OF SUGAR PALM IN PHETCHABURI PROVINCE 2020-12-28T09:40:20+07:00 Pattamaporn Yodsanti Noppon Mingmuang Benchamat Pianet Pattira Katasrila Siriporn Mamuang <p>This research aimed to assess the carbon storage contents of sugar palms in the palm plantation and the natural areas and to compare the difference of carbon storage contents in both sources of Ban Lat district, Phetchaburi province. The height of 403 sugar palm trees in the palm plantation and 500 sugar palm trees in the natural areas were collected for analysis of the above-ground biomass values by the Allometric equation. <br>The results revealed that the mean of carbon content sequestered in the palm plantation was 30.84±2.59 kilogram Carbon. While the average of carbon storage content in the natural areas was 37.08±2.28 kilogram Carbon. When the means of carbon storage content in both sources were compared, the result showed that the mean of carbon content sequestered in the palm of both sources was significantly different at p&lt; 0.05.</p> 2020-11-30T10:54:16+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology CARBON STORAGE IN BIOMASS OF PERENNIAL PLANTS AT BAN SANGTAWAN COMMUNITY FOREST, SURIN PROVINCE 2020-12-28T09:40:21+07:00 Yuppayao Tokeeree Chuanpit Jarat Duangtar Novacek Nongnut Saraph <p>This research aimed to study the plant species diversity and carbon storage in biomass of perennial plants in the dry dipterocarp forest area at Bann Sangtawan community forests, Mueang district, Surin province which was a deciduous dipterocarp forest with 20 rai of the study area. Two square plots (40 x 40 m) were established in the study site. Species identification was studied. Diameter at breast height (DBH) of trees (greater than 4.5 cm) and their height were measured. The biomass was calculated using the allometric equation. Then, the carbon storage was estimated. The result indicated that 25 families, 31 genus, 35 species were found from Bann Sangtawan community forests. Average tree density was 263 trees/rai. Average tree basal area was 2.896 m<sup>2</sup>/rai. Average carbon storage in biomass was 12,281.23 kg/rai and total carbon storage of forest area was 245,624.52 kg. The highest carbon storage in biomass of plant was <em>Dipterocarpus obtusifolius</em>&nbsp;Teijsm. ex Miq. (7,839.36 kg/rai), follow by <em>Dipterocarpus intricatus </em>Dyer (2,393.38 kg/rai) and<em> Melodorum fruticosum</em> Lour. (383.71 kg/rai), respectively. Therefore, this research suggested that perennial plants in the forest ecosystem play an important role in carbon storage in wood and decrease global warming.</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology APPLICATION OF THE ELECTRICAL RESISTIVITY DETERMINATION OF GROUND LAYER FOR THE GROUNDWATER SOURCES PREDICTION 2020-12-28T09:40:21+07:00 Thanawat Rangsungnoen <p>The research on application of the electrical resistivity determination of ground layer for the groundwater sources prediction was conducted to survey, and assesses the potential of the exploration points on developing groundwater sources for the community. A geophysical exploration via electrical resistivity method was employed to measure and analyze the soil layers at the survey points at Sokchan Pattana village, Makluea Kao subdistrict, Sung Noen district, Nakhon Ratchasima Province. Experimental survey data were compared to the data of the groundwater wells at the nearby area. For the physical aspect, the result was shown that the data at the survey area of 7 points were aquifers that consistent with the geological data set of rocks Khok Kruat Formation. Geophysics aspect via exploration of a vertical electrical resistivity method, there were 2 points that seem to have potential of development for groundwater wells as: points A1 and A3. They could have groundwater at the depths of 34.65 and 39.74 meters, respectively. Whereas, the survey point A5 was likely to find groundwater at the depth of 62.5 meters. It can be concluded that the surveyed areas have opportunity and trend to find groundwater in aquifers of Khok Kruat Formation. The amount of water was at 2-20 cubic meters per hour at the depths between 30 and 90 meters with a good quality of water.</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology CREATION MODEL OF TIME-DEPENDENT LOWERING OPERATOR AND RAISING OPERATOR UNDER TIME-DEPENDENT EXTERNAL DAMPING FORCE SIMPLE HARMONIC OSCILLATOR 2020-12-28T09:40:22+07:00 Piyarut Moonsri Prisana Yakaw Artit Hutem <p>In this research paper, we developed a theory and model of the forced simple harmonic oscillators in quantum mechanics system in a framework of a general approach to the Heisenberg picture. We can be used the time-dependent Hamiltonian for the forced simple harmonic oscillators. We use first-order ordinary linear differential equation to solve the time-dependent lowering operator and raising operator. We evaluate the lowering operator and raising operator as the function of time for particle mass &nbsp;depend on the parameter frequency of oscillation , the damping coefficient of particle bound in the simple harmonic oscillator potential, the initial force .</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology DETERMINATION OF TOTAL PHENOLIC AND FLAVONOID CONTENTS, ANTIOXIDANT AND ANTIBACTERIAL ACTIVITIES OF FOUR WILD EDIBLE MUSHROOMS FROM THE COMMUNITY MARKET IN LOEI PROVINCE 2020-12-28T09:40:22+07:00 Pattawat Seekhaw Sothida Rachinta Naruemol Thurnkul Panitan Surayot <p>The present study determines the total phenolic and flavonoid contents (TPC and TFC), antioxidant and antibacterial activities from the ethanol extract of four wild edible mushrooms bought from the community market in Loei Province: <em>Boletus</em> sp., <em>Boletellus</em> cf. <em>emodensis</em>, <em>Pulveroboletus</em> sp. and <em>Tylopilus </em>sp. The total phenolic and flavonoid contents were evaluated by using Folin-Ciocalteu and aluminum chloride colorimetric methods, respectively. The result indicated that the extract of <em>Boletus sp. </em>extract showed the highest of TPC and TFC, which was 61.69±0.35 mg GAE/g extract and 54.45±0.93 mg RUE/g extract, respectively. The antioxidant activities of the extracts were investigated by 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) methods. It was found that <em>Boletus</em> sp. extract exhibited the highest antioxidant activities. The IC<sub>50</sub> value by DPPH and ABTS assay were 0.26±0.01 and 1.33±0.07 mg/ml, respectively and the FRAP assay exhibited antioxidant value of 33.14±0.29 FeSO<sub>4</sub>/g extract. In addition, the antibacterial activity was tested by disc diffusion method. The <em>Boletus</em> sp. extract inhibited <em>Bacillus subtilis</em>, <em>Staphylococcus aureus</em>, <em>Escherichia coli</em> and <em>Proteus vulgaris</em> at concentration of 5 mg/ml. In conclusion, four selected wild bee mushroom will be considered as a source of beneficial bioactive compounds and nutritious food.</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology PLANT DIVERSITY IN KHAO KHONG KHA FOREST MONASTERY KHON BURI DISTRICT, NAKHON RATCHASIMA PROVINCE 2020-12-28T09:40:23+07:00 Thiamhathai Choopan Narissa Wadee Saranya Klahan Suwannee Udomsub <p>Plant diversity in Khao Khong Kha Forest Monastery, Khon Buri District, Nakhon Ratchasima Province was studied in this research. Eighteen of tree plots (20´20 m) and understory plant plots (5´5 m) were sampled together with natural trail surveying. The study revealed that 38 families 83 genera 98 species of trees were found. The dominant species of tree were <em>Cratoxylum cochinchinense</em> (Lour.) Blume, <em>Bauhinia saccocalyx</em> Pierre, and <em>Xylia xylocarpa</em> (Roxb.) W. Theob. var. <em>kerrii</em> (Craib &amp; Hutch.) I.C. Nielsen, respectively. The highest important value index was <em>Bauhinia saccocalyx</em> Pierre, <em>Cratoxylum cochinchinense</em> (Lour.) Blume, and <em>Xylia xylocarpa</em> (Roxb.) W. Theob. var. <em>kerrii</em> (Craib &amp; Hutch.) I.C. Nielsen, respectively. Tree diversity index was 3.6656. Evenness index was 0.7995. Diversity value was 39.0785. Moreover, there were 61 families 137 genera 145 species of understory plants. The dominant species of understory were <em>Scindapus officinalis</em> (Roxb.) Schott, <em>Acroceras munroanum</em> (Balansa) Henrard, and <em>Rhynchosia bracteata</em> Benth. ex Baker, respectively. The highest important value index was <em>Scindapus officinalis</em> (Roxb.), <em>Bauhinia saccocalyx</em> Pierre, and <em>Acroceras munroanum</em> (Balansa) Henrard, respectively. Understory plant diversity index was 3.9968, Evenness index was 0.8031 and Diversity value was 54.4228. The most diverse families were Fabaceae (30 species), Rubiaceae (13 species), and Malvaceae (10 species), respectively. This information used for making conservation and sustainable utilization plan, and also developing as local learning center.</p> 2020-11-30T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology ABUNDANCE OF FIREFLY (INSECTA: COLEOPTERA: LAMPYRIDAE) IN WELU WETLAND MANGROVE FOREST, CHANTHABURI PROVINCE 2020-12-28T09:40:24+07:00 Sorasak Nakeiam Kanjana Saiyot Saruta Majchakua Panlop Sangpongpitaya Wanida Klaewkla Chutapa Kunsook Chawanrat Somnuek <p>The abundance of fireflies was conducted monthly during February 2018 to January 2019 in the mangrove forest at Welu wetland, Chanthaburi province. The study area was divided into three study stations of which was separated into two parts, left and right. The adult fireflies perching and flashing on all display trees were photographed and counted for abundance. Some physical factors of their habitats were investigated. The result showed the significant difference of the abundances between the study stations (P&lt;0.001), but no differences among monthly abundance were observed. The left part of the 1<sup>st</sup> station held the most abundance with high dissolved oxygen (DO) and low water temperature, pH, and water salinity. Meanwhile, the left part of the 3<sup>rd</sup> station was the lowest abundance with the lowest DO and high water temperature, pH and water salinity. Nonetheless, no correlation between the abundance of fireflies and some physical factors of their habitats was exhibited.</p> 2020-12-02T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology PRODUCTION OF FUEL PELLETS FROM COCONUT COIR DUST MIXED WITH BIOMASS WASTES 2020-12-28T09:40:24+07:00 Napada Wichianphong Taweesub Juepanit Phantipa Miangkae <p>The objective of this research was to produce biomass fuel pellets from agricultural wastes in order to explore an alternative energy source and disposal of the agricultural waste in community. In this study, dried biomass was compressed with pelletizer machine into small cylindrical pellets with approximately 6 mm in diameter and 1-2 mm in length. The obtained fuel pellets was made from primary raw material as coconut coir dust, <br>an abundantly available waste material found in Bang Kla district of Chachoengsao province, mixed with different kinds of waste, including animal manure from chicken, duck and cow, rice husk, sawdust and mango leaves, at the weight ratio of 60 : 40. In addition, Agro-industrial wastes, such as low-quality tapioca starch rejected and molasses were used as binders in the preparation of pellets. Parameters of the obtained pellets such as heating value, moisture, ash, volatile matter, fixed carbon content were investigated. It was found that the heating value of the obtained fuel pellets was between 3,583-4,225 kilocalories per kilogram (kcal/kg). The pellets made from coconut coir dust mixed with sawdust (60 : 40) using starch paste as a binder provided the highest heating value as 4,225 kcal/kg. Moreover, the other properties of resulting pellets, including moisture, ash and fixed carbon content, were in the range of standard values of community product chunk-compressed charcoal and common charcoal.</p> 2020-12-02T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology INVESTIGATION AND ISOLATION OF MYCORRHIZAL FUNGI FROM TERRESTRIAL ORCHID GENUS SPATHOGLOTTIS GROWN IN POT 2020-12-28T09:40:25+07:00 Theeraporn Junsri Apsonsawan Jaiboon Keerati Tanruean Pisit Poolprasert Rattiphorn Sumang Rampai Kodsueb Ruangwut Chutima <p>This research aims to investigate the mycorrhizal relationship and isolate mycorrhizal fungi from terrestrial orchid, genus <em>Spatthoglottis</em>, which grown in pot to use as basically data for development of fungal inoculum and enhancing growth of terrestrial orchid grown in pot. The roots of 3 <em>Spathoglottis</em> orchids were corrected, randomly and stained with 0.05% w/v trypan blue. The results showed that the peloton structures, coil of fungal hypha, were found in cortex root tissues of all 3 orchid plants. In addition, 6 fungal isolates were isolated from roots of these 3 orchid samples and all fungal isolates were able to culture in laboratory without host plant. The fungal morphological study, including of fungal colony on agar media and characterization of hyphaunder microscope, revealed that all fungal isolated belonged to higher fungi due to septate hypha were found. Moreover, 5 fungal isolates were found spore formation after cultured on Potato dextrose agar (PDA) while fungal isolate SPGT 006 was not found spore formation. This research indicated that the mycorrhizal relationship was found in terrestrial orchid, genus <em>Spathoglottis</em>, grown in pot and all isolated fungi were able to culture in laboratory without their host plants. Therefore, these results are possibility for further study to develop mycorrhizal inoculum for terrestrial orchid grown in pot.</p> 2020-12-08T00:00:00+07:00 Copyright (c) 2020 PSRU Journal of Science and Technology