Pub Date : 2023-08-04DOI: 10.55766/sujst-2023-03-e02021
Theeradon Sakpetch, Kumkup Keeratisiwakul, Kodchakorn Klongklaw, Narawit Pratueangsukpong, Pat Vatiwutipong
Solar power is a renewable energy source suitable for residential usage due to its affordability and the small area required for installation. However, it requires an effective energy storage system that can minimize power outages within a limited budget. This challenge was addressed by analyzing energy storage systems regarding climate and user behavior. In this study, a mathematical model has been developed to design a cost-effective energy storage system for an off-grid household. We utilized the Markov weather process and Monte Carlo simulation, considering various scenarios of available energy supply, energy consumption, and user behavior. In accordance with the outcome, the size and type of battery system from our model minimized power outages throughout the year. We applied our model to a 1600-square foot house in Rayong, Thailand, with the meteorological data and typical electricity loads from user data. For a budget threshold of 40,000 USD, our model suggests that the best battery is Tesla Powerwall+, which results in an average power outage of only around 3 hours per year, outperforming other batteries under identical economic conditions. Additionally, our model can be widely applied to real scenarios by considering a broader range of batteries, environmental impact and available space, and hybrid systems as well.
{"title":"MATHEMATICAL MODEL AND SIMULATION FOR DESIGNING A COST-OPTIMIZED OFF-GRID HOUSE SOLAR ENERGY STORAGE SYSTEM","authors":"Theeradon Sakpetch, Kumkup Keeratisiwakul, Kodchakorn Klongklaw, Narawit Pratueangsukpong, Pat Vatiwutipong","doi":"10.55766/sujst-2023-03-e02021","DOIUrl":"https://doi.org/10.55766/sujst-2023-03-e02021","url":null,"abstract":"Solar power is a renewable energy source suitable for residential usage due to its affordability and the small area required for installation. However, it requires an effective energy storage system that can minimize power outages within a limited budget. This challenge was addressed by analyzing energy storage systems regarding climate and user behavior. In this study, a mathematical model has been developed to design a cost-effective energy storage system for an off-grid household. We utilized the Markov weather process and Monte Carlo simulation, considering various scenarios of available energy supply, energy consumption, and user behavior. In accordance with the outcome, the size and type of battery system from our model minimized power outages throughout the year. We applied our model to a 1600-square foot house in Rayong, Thailand, with the meteorological data and typical electricity loads from user data. For a budget threshold of 40,000 USD, our model suggests that the best battery is Tesla Powerwall+, which results in an average power outage of only around 3 hours per year, outperforming other batteries under identical economic conditions. Additionally, our model can be widely applied to real scenarios by considering a broader range of batteries, environmental impact and available space, and hybrid systems as well.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139351742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01909
S. Poochaya
Large urban community requires convenient public transportation system. In-coming of Intelligent Transportation System (ITS) and newest communication technology produce a fast development of conventional transportation system. Focus on mass transportation system, vehicle equips with commuication devices and GPS modules which transmit latitute, longtitute, ground speed to network or cloud. Estimated Time of Arrival (ETA) were computed by received data on cloud. As result, ETA show to passensgers via mobile application or LCD TV in bus stops. This work presents investigation of ETA error using V2N/ITS technology. Moreover, AI technology was selected to vehicle classification in red route internal bus service period. Finally, ETA error of service period indicates 5-10 Minutes due to traffic especially rush hour in the red routes.
大型城市社区需要便捷的公共交通系统。智能交通系统（ITS）和最新通信技术的出现使传统交通系统得到了快速发展。在大众交通系统中，车辆配备了通信设备和 GPS 模块，可将纬度、时长、地面速度等信息传输到网络或云端。云端通过接收到的数据计算出预计到达时间（ETA）。结果，ETA 会通过移动应用程序或巴士站的液晶电视显示给乘客。本作品利用 V2N/ITS 技术对 ETA 误差进行了研究。此外，还选择了人工智能技术对红色线路内部公交服务时段的车辆进行分类。最后，由于交通流量，特别是红色路线高峰时段的交通流量，服务期间的 ETA 误差显示为 5-10 分钟。
{"title":"ETA INVESTIGATIONS ON SUT SMART TRANSIT IN RED ROUTE USING ITS AND ARTIFICIAL INTELLIGENT TECHNOLOGY","authors":"S. Poochaya","doi":"10.55766/sujst-2023-01-e01909","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01909","url":null,"abstract":"Large urban community requires convenient public transportation system. In-coming of Intelligent Transportation System (ITS) and newest communication technology produce a fast development of conventional transportation system. Focus on mass transportation system, vehicle equips with commuication devices and GPS modules which transmit latitute, longtitute, ground speed to network or cloud. Estimated Time of Arrival (ETA) were computed by received data on cloud. As result, ETA show to passensgers via mobile application or LCD TV in bus stops. This work presents investigation of ETA error using V2N/ITS technology. Moreover, AI technology was selected to vehicle classification in red route internal bus service period. Finally, ETA error of service period indicates 5-10 Minutes due to traffic especially rush hour in the red routes.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01902
L. Kanagasabai
In this paper, the Quantum-based Ceratitis Optimization (QCO) algorithm and Tetrapturus georgii optimization (QTO) algorithm are applied for solving the loss shrinking. The Ceratitis Optimization algorithm is premeditated on the systematic engagements of Ceratitis and in the red to splendid view and countered considerate activities Ceratitis diet is assimilated. The tetrapturus georgii optimization algorithm is modeled based on the stalking deeds of Tetrapturus georgii and it’s gluttonous, quest the Etrumeus in a constellation manner. Quantum mechanics has been combined with Ceratitis Optimization (QCO) algorithm and the Tetrapturus georgii optimization (QTO) algorithm. In the quantum process, topographies out do the equivalent enactment with the convinced period as they route in a credible powdered of the median.
本文应用基于量子的 Ceratitis 优化算法（QCO）和 Tetrapturus georgii 优化算法（QTO）来解决损失缩减问题。Ceratitis Optimization 算法预设了 Ceratitis 的系统性参与，并在红色到绚丽的视图和反击体贴的活动中同化了 Ceratitis 的饮食。Tetrapturus georgii 优化算法是根据 Tetrapturus georgii 的缠斗行为和它的贪吃来建模的，以星座的方式追求 Etrumeus。量子力学与 Ceratitis 优化（QCO）算法和 Tetrapturus georgii 优化（QTO）算法相结合。在量子过程中，拓扑图会在确信的时间内完成等效颁布，就像它们在中值的可信粉末中的路线一样。
{"title":"NOVEL QUANTUM-BASED CERATITIS AND TETRAPTURUS GEORGII OPTIMIZATION ALGORITHMS FOR REAL POWER LOSS REDUCTION","authors":"L. Kanagasabai","doi":"10.55766/sujst-2023-01-e01902","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01902","url":null,"abstract":"In this paper, the Quantum-based Ceratitis Optimization (QCO) algorithm and Tetrapturus georgii optimization (QTO) algorithm are applied for solving the loss shrinking. The Ceratitis Optimization algorithm is premeditated on the systematic engagements of Ceratitis and in the red to splendid view and countered considerate activities Ceratitis diet is assimilated. The tetrapturus georgii optimization algorithm is modeled based on the stalking deeds of Tetrapturus georgii and it’s gluttonous, quest the Etrumeus in a constellation manner. Quantum mechanics has been combined with Ceratitis Optimization (QCO) algorithm and the Tetrapturus georgii optimization (QTO) algorithm. In the quantum process, topographies out do the equivalent enactment with the convinced period as they route in a credible powdered of the median.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01910
Ekkasit Kanklang, C. Songsiriritthigul, J. Yongsawatdigul, S. Rodtong
The high demand for amylase and lactic acid in various industries made enzyme and acid production from cheap substrates very attractive. This study investigated the effect of major medium constituents on amylase and D-lactic acid production by the potential starch-utilizing and optical pure D-lactic acid-producing Lactobacillus sp. SUTWR 73, to provide data for the efficient application of the lactic acid bacterium. Its amylase and D-lactic acid production was considerably affected by the addition of organic nitrogen tryptone to certain cassava starch concentrations as a carbon-source. While the other medium compositions: yeast extract and cheap nitrogen sources (soy protein, defatted rice bran, and spent brewery yeast) compared to tryptone as equal total nitrogen contents, did not have any effect on either metabolite production. The medium containing cassava starch (4.0%, w/v) and tryptone (4.5%, w/v) can be satisfactorily used for both products. The initial pH of the production medium was another factor affecting metabolite production. A suitable initial pH was 8.0 and 7.0-10.0 for amylase and D-lactic acid production, respectively. Amylase activity was detected at the early log growth phase while the D-lactic acid was produced at the late log phase. Understanding the relationship between amylase and D-lactic acid production from this study is important for designing an economical operating system for the direct production of D-lactic acid from cheap cassava starch without adding any commercial amylase as a substrate in pretreatment resulting in reduction costs of the production process.
{"title":"EFFECTS OF MEDIA COMPOSITIONS ON AMYLASE AND D-LACTIC ACID PRODUCED BY A POTENTIAL STARCH-UTILIZING BACTERIUM","authors":"Ekkasit Kanklang, C. Songsiriritthigul, J. Yongsawatdigul, S. Rodtong","doi":"10.55766/sujst-2023-01-e01910","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01910","url":null,"abstract":"The high demand for amylase and lactic acid in various industries made enzyme and acid production from cheap substrates very attractive. This study investigated the effect of major medium constituents on amylase and D-lactic acid production by the potential starch-utilizing and optical pure D-lactic acid-producing Lactobacillus sp. SUTWR 73, to provide data for the efficient application of the lactic acid bacterium. Its amylase and D-lactic acid production was considerably affected by the addition of organic nitrogen tryptone to certain cassava starch concentrations as a carbon-source. While the other medium compositions: yeast extract and cheap nitrogen sources (soy protein, defatted rice bran, and spent brewery yeast) compared to tryptone as equal total nitrogen contents, did not have any effect on either metabolite production. The medium containing cassava starch (4.0%, w/v) and tryptone (4.5%, w/v) can be satisfactorily used for both products. The initial pH of the production medium was another factor affecting metabolite production. A suitable initial pH was 8.0 and 7.0-10.0 for amylase and D-lactic acid production, respectively. Amylase activity was detected at the early log growth phase while the D-lactic acid was produced at the late log phase. Understanding the relationship between amylase and D-lactic acid production from this study is important for designing an economical operating system for the direct production of D-lactic acid from cheap cassava starch without adding any commercial amylase as a substrate in pretreatment resulting in reduction costs of the production process.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chemical graph theory has become a significant part of the research. Topological indices are numerical descriptors used to determine physico-chemical properties of chemical compounds. In this work, the generalized redefined Zagreb index is defined. This index is applied on several topological indices viz., redefined Zagreb indices (ReZG1(G), ReZG2(G), ReZG3(G)), sum-connectivity Zagreb index (SCI(G)), hyper Zagreb index (HM(G)), harmonic index (H(G)), arithmetic-geometric index (AGI(G)), SK index (SK(G)) and SK1 index (SK1(G)). The above said indices are calculated for aromatic compounds such as boron triangular sheet, borophene chain and melem chain nanostructures. The obtained results are useful in understanding the behaviour of compounds under the study.
{"title":"GENERALIZED REDEFINED ZAGREB INDEX ON SOME NANOSTRUCTURES","authors":"Shanmukha Mullemani Channappa, Shilpa Kalajji Channabasappa, Usha Arcot, Anil Kumar Kempasidpla Nagarajappa","doi":"10.55766/sujst-2023-01-e01919","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01919","url":null,"abstract":"Chemical graph theory has become a significant part of the research. Topological indices are numerical descriptors used to determine physico-chemical properties of chemical compounds. In this work, the generalized redefined Zagreb index is defined. This index is applied on several topological indices viz., redefined Zagreb indices (ReZG1(G), ReZG2(G), ReZG3(G)), sum-connectivity Zagreb index (SCI(G)), hyper Zagreb index (HM(G)), harmonic index (H(G)), arithmetic-geometric index (AGI(G)), SK index (SK(G)) and SK1 index (SK1(G)). The above said indices are calculated for aromatic compounds such as boron triangular sheet, borophene chain and melem chain nanostructures. The obtained results are useful in understanding the behaviour of compounds under the study.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01905
Sudaporn Tangkawanit, Piriyaporn Keawsri
Silk fabrics are modified by dyeing with natural indigo and ZnO nanoparticles coating to enhance functional textiles. Silk fabrics are coated with different weight of 1, 2, 3, and 4 g of ZnO nanoparticles. The properties of coated silk fabrics and color fastness of fabrics dyed were investigated. The FE-SEM and EDS results of the coated silk with ZnO nanoparticles were clearly confirmed the strongly adsorption bond of ZnO on the surface of silk adsorbent. Silk coated 3 g ZnO nanoparticles also provide optimal condition as the presence of Zn content on silk surface remain contain approximately 79.00, 76.84, and 75.95 wt%, which was slightly decreased after repeated 10, 20 and 30 washed cycles, respectively. Coated silk fabrics samples and indigo dyed exhibited excellent anti UV protection with UPF values in the range of 49.31 to 105.83. ZnO nanoparticles modified silk fabrics can be used for improved washing fastness of natural indigo dyed, UV protection, heat resistant, color fastness and durability of antibacterial.
{"title":"SILK FABRICS COATED ZnO NANOPARTICLES AND DYEING WITH NATURAL INDIGO TO ENHANCE FUNCTIONAL TEXTILES","authors":"Sudaporn Tangkawanit, Piriyaporn Keawsri","doi":"10.55766/sujst-2023-01-e01905","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01905","url":null,"abstract":"Silk fabrics are modified by dyeing with natural indigo and ZnO nanoparticles coating to enhance functional textiles. Silk fabrics are coated with different weight of 1, 2, 3, and 4 g of ZnO nanoparticles. The properties of coated silk fabrics and color fastness of fabrics dyed were investigated. The FE-SEM and EDS results of the coated silk with ZnO nanoparticles were clearly confirmed the strongly adsorption bond of ZnO on the surface of silk adsorbent. Silk coated 3 g ZnO nanoparticles also provide optimal condition as the presence of Zn content on silk surface remain contain approximately 79.00, 76.84, and 75.95 wt%, which was slightly decreased after repeated 10, 20 and 30 washed cycles, respectively. Coated silk fabrics samples and indigo dyed exhibited excellent anti UV protection with UPF values in the range of 49.31 to 105.83. ZnO nanoparticles modified silk fabrics can be used for improved washing fastness of natural indigo dyed, UV protection, heat resistant, color fastness and durability of antibacterial.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01903
Tarekegn Reta Mesfin, Eba Kitata Kenea
Gravel roads deterioration with absence of maintenance is one of the serious issue and common problem in the world. It’s majorly affected by deterioration which manifests as removing from gravel road materials with the major factors such as traffic volume and environmental conditions. Jimma zone might have been a standout amongst those ranges influenced toward the issue for gravel road having lack of maintenances. In order to achieve the objective of this study, the researchers were used questionnaire survey method. The existing road sections having lack of maintenance on a given time have been identified. Then the representative road (Sarbo-Busa, Saka-Ushane and Buxure-Sanxama) and questionnaire surveys samples have been selected by non-probabilistic purposive and systematic sampling respectively. The questionnaire’s survey was focused on identifying the causes of absence of maintenance and pre-conditions considered. questionnaire survey was analyzed by RII. The absence of maintenance was occurred due to lack of budget fund, poor management, lack of skilled manpower, lack of good material quality, lack of regular inspections, poor working environments. The pre-conditions considered while maintaining the gravel roads are: Cost of maintenance, class as the road, maintenance schedule, skilled manpower, topography, number of road users, traffic volume, and economic standards of the society and location of the road from the center. In Jimma zone the deterioration of gravel roads have been increasing with the absence of maintenance time.
{"title":"ASSESSMENTS OF THE GRAVEL ROAD DETERIORATION HAVING LACK OF MAINTENANCE: CASE STUDY IN JIMMA ZONE","authors":"Tarekegn Reta Mesfin, Eba Kitata Kenea","doi":"10.55766/sujst-2023-01-e01903","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01903","url":null,"abstract":"Gravel roads deterioration with absence of maintenance is one of the serious issue and common problem in the world. It’s majorly affected by deterioration which manifests as removing from gravel road materials with the major factors such as traffic volume and environmental conditions. Jimma zone might have been a standout amongst those ranges influenced toward the issue for gravel road having lack of maintenances. In order to achieve the objective of this study, the researchers were used questionnaire survey method. The existing road sections having lack of maintenance on a given time have been identified. Then the representative road (Sarbo-Busa, Saka-Ushane and Buxure-Sanxama) and questionnaire surveys samples have been selected by non-probabilistic purposive and systematic sampling respectively. The questionnaire’s survey was focused on identifying the causes of absence of maintenance and pre-conditions considered. questionnaire survey was analyzed by RII. The absence of maintenance was occurred due to lack of budget fund, poor management, lack of skilled manpower, lack of good material quality, lack of regular inspections, poor working environments. The pre-conditions considered while maintaining the gravel roads are: Cost of maintenance, class as the road, maintenance schedule, skilled manpower, topography, number of road users, traffic volume, and economic standards of the society and location of the road from the center. In Jimma zone the deterioration of gravel roads have been increasing with the absence of maintenance time.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01913
K. Boonyarattanakalin, Tanisara Noinonmueng, Thanaphon Kansaard, Tirapat Wechprasit, W. Mekprasart, Kanoknan Phacheerak, W. Pecharapa, A. Jaruvanawat
This work represents the synthesis and structural, morphological, and optical characterization of rare-earth Yb-doped BiVO4 materials with different Ytterbium (Yb3+) contents (0% - 5%). Yb-doped BiVO4 specimens in form of fine nanoparticles were synthesized by a rapid and facile sonochemical process. The structural and morphological characterizations were observed by X-ray diffraction technique (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Important optical properties of the prepared samples were investigated by the diffuse reflectance technique and the corresponding optical band gaps were calculated by the mean of the Kullbelka-Munk equation. From the characterized results, it is acknowledged that incorporated Yb dopant has a significant effect on the crystalline structure of BiVO4 by reducing in monoclinic phase in the pristine sample while the increasing Yb doping composition resulted in the mixed phases of monoclinic and tetragonal phases since Yb3+ ions could probably induce the stabilization of the tetragonal phase in BiVO4 material. Moreover, extensive doping with Yb3+ exhibits considerable influence on not only structural but also optical and relevant visible - driven photocatalytic properties of BiVO4 by means of the color degradation of RhB dye solution.
{"title":"STRUCTURAL, OPTICAL, AND VISIBLE-LIGHT DRIVEN PHOTACATALYTIC PROPERTIES OF Yb-DOPED BiVO4 NANOPARTICLES PREPARED VIA RAPID SONOCHEMICAL PROCESS","authors":"K. Boonyarattanakalin, Tanisara Noinonmueng, Thanaphon Kansaard, Tirapat Wechprasit, W. Mekprasart, Kanoknan Phacheerak, W. Pecharapa, A. Jaruvanawat","doi":"10.55766/sujst-2023-01-e01913","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01913","url":null,"abstract":"This work represents the synthesis and structural, morphological, and optical characterization of rare-earth Yb-doped BiVO4 materials with different Ytterbium (Yb3+) contents (0% - 5%). Yb-doped BiVO4 specimens in form of fine nanoparticles were synthesized by a rapid and facile sonochemical process. The structural and morphological characterizations were observed by X-ray diffraction technique (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Important optical properties of the prepared samples were investigated by the diffuse reflectance technique and the corresponding optical band gaps were calculated by the mean of the Kullbelka-Munk equation. From the characterized results, it is acknowledged that incorporated Yb dopant has a significant effect on the crystalline structure of BiVO4 by reducing in monoclinic phase in the pristine sample while the increasing Yb doping composition resulted in the mixed phases of monoclinic and tetragonal phases since Yb3+ ions could probably induce the stabilization of the tetragonal phase in BiVO4 material. Moreover, extensive doping with Yb3+ exhibits considerable influence on not only structural but also optical and relevant visible - driven photocatalytic properties of BiVO4 by means of the color degradation of RhB dye solution.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01907
Rattaporn Sumalu, C. Songsiriritthigul, J. Yongsawatdigul, S. Rodtong
Amylase is a crucial starch-degrading enzyme, which is commercially available, prvides benefit to starchy industry to overcome viscosity problem that caused by using high starch concentration, and to supply sugar residues. This study aimed to investigate the production of amylase by the potential optical pure L-lactic acid-producing Lactococcus sp. SUT 513 for further development of the optical pure acid fermentation process from the cheap cassava starch. Rice bran, the main byproduct in the process of rice milling, was found to provide the maximum amylase production when supplemented with 4.0 g/L (w/v) to the medium containing cassava starch (20.0 g/L, w/v), compared to the cassava medium added either the expensive nitrogen source, tryptone (5.0 g/L) and yeast extract (3.0 g/L, w/v); or the cheap alternatives, soy ptotein (8.0 g/L) or urea (2.0 g/L) combined with yeast extract (3.0 g/L). The amylase activity obtained from the developed medium was approximately 3 times higher than the original medium. This bacterium gave the highest crude amylase activity of 4.848±0.237 U/mL in the suitable medium performed in a7.5-L bioreactor with 3.0-L working volume for the optimal cultivation time of only 18 h under a control pH of 7.0, temperature at 35°C, agitation at 150 rpm, and without aeration. The results reveal the high potential production of amylase by Lactococcus sp. SUT 513 using the cheap cassava starch medium supplemented with rice bran, providing an opportunity to develop both amylase and optically pure L-lactic acid production processes.
淀粉酶是一种重要的淀粉降解酶，可通过商业途径获得，有利于淀粉工业克服因使用高浓度淀粉而产生的粘度问题，并提供糖渣。本研究旨在调查潜在的光纯 L-乳酸生产乳球菌 SUT 513 生产淀粉酶的情况，以便进一步开发利用廉价木薯淀粉的光纯酸发酵工艺。米糠是碾米过程中的主要副产品，在含有木薯淀粉（20.0 g/L，w/v）的木薯培养基相比，前者添加了昂贵的氮源--胰蛋白胨（5.0 g/L）和酵母提取物（3.0 g/L，w/v）；后者添加了廉价的氮源--大豆蛋白胨（8.0 g/L）或尿素（2.0 g/L）和酵母提取物（3.0 g/L）。从开发的培养基中获得的淀粉酶活性大约是原始培养基的 3 倍。在控制 pH 值为 7.0、温度为 35°C、搅拌转速为 150 rpm、不通气的条件下，在工作容积为 3.0 L、培养时间为 18 h 的 7.5 L 生物反应器中，该细菌在合适的培养基中获得了最高的粗淀粉酶活性（4.848±0.237 U/mL）。结果表明，使用廉价的木薯淀粉培养基并辅以米糠，乳球菌 SUT 513 生产淀粉酶的潜力很大，这为开发淀粉酶和光学纯 L-乳酸生产工艺提供了机会。
{"title":"BACTERIAL AMYLASE PRODUCTION BY THE L-LACTIC ACID-PRODUCING STRAIN USING CASSAVA STARCH SUPPLEMENTED WITH RICE BRAN","authors":"Rattaporn Sumalu, C. Songsiriritthigul, J. Yongsawatdigul, S. Rodtong","doi":"10.55766/sujst-2023-01-e01907","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01907","url":null,"abstract":"Amylase is a crucial starch-degrading enzyme, which is commercially available, prvides benefit to starchy industry to overcome viscosity problem that caused by using high starch concentration, and to supply sugar residues. This study aimed to investigate the production of amylase by the potential optical pure L-lactic acid-producing Lactococcus sp. SUT 513 for further development of the optical pure acid fermentation process from the cheap cassava starch. Rice bran, the main byproduct in the process of rice milling, was found to provide the maximum amylase production when supplemented with 4.0 g/L (w/v) to the medium containing cassava starch (20.0 g/L, w/v), compared to the cassava medium added either the expensive nitrogen source, tryptone (5.0 g/L) and yeast extract (3.0 g/L, w/v); or the cheap alternatives, soy ptotein (8.0 g/L) or urea (2.0 g/L) combined with yeast extract (3.0 g/L). The amylase activity obtained from the developed medium was approximately 3 times higher than the original medium. This bacterium gave the highest crude amylase activity of 4.848±0.237 U/mL in the suitable medium performed in a7.5-L bioreactor with 3.0-L working volume for the optimal cultivation time of only 18 h under a control pH of 7.0, temperature at 35°C, agitation at 150 rpm, and without aeration. The results reveal the high potential production of amylase by Lactococcus sp. SUT 513 using the cheap cassava starch medium supplemented with rice bran, providing an opportunity to develop both amylase and optically pure L-lactic acid production processes.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-26DOI: 10.55766/sujst-2023-01-e01912
Ratih Dianingtyas Kurnia, Pornsiri Jongkol
Anthropometry takes part in making a difference in managing physical human needs including elderly needs in order to improve their quality of life. The objective of this study was to measure the body dimension of healthy Thai elderly living in rural areas and investigate the relationship among body dimensions. Questionnaire was given to the respondents in order to get their demographic data. Questionnaire and anthropometry measurements were taken on a total of 23 male elderly and 88 female elderly people from rural areas in Northeastern Thailand. Most respondents (49.5%) of the total elderly are in their 60s, 32.4% in their 70s, 17.2% in their 80s, and 1% in their 90s. 54.1% of them are still actively working and 96.4% of them are regularly doing body exercise in keeping their body fit and healthy. The body dimensions measured consist of 22 standing dimensions, 20 sitting dimensions, and 15 foot and hand dimensions. Positive correlations were found between some of the body dimensions. The developed anthropometric data is expected to overcome the information gap related to the dimensions of the body of the elderly and to assist the development of products and other supporting equipment to be anthropometrically compatible for elderly residents of rural areas in the future.
{"title":"ANTHROPOMETRIC MEASUREMENT OF THAI ELDERLY IN NORTHEASTERN RURAL AREA","authors":"Ratih Dianingtyas Kurnia, Pornsiri Jongkol","doi":"10.55766/sujst-2023-01-e01912","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01912","url":null,"abstract":"Anthropometry takes part in making a difference in managing physical human needs including elderly needs in order to improve their quality of life. The objective of this study was to measure the body dimension of healthy Thai elderly living in rural areas and investigate the relationship among body dimensions. Questionnaire was given to the respondents in order to get their demographic data. Questionnaire and anthropometry measurements were taken on a total of 23 male elderly and 88 female elderly people from rural areas in Northeastern Thailand. Most respondents (49.5%) of the total elderly are in their 60s, 32.4% in their 70s, 17.2% in their 80s, and 1% in their 90s. 54.1% of them are still actively working and 96.4% of them are regularly doing body exercise in keeping their body fit and healthy. The body dimensions measured consist of 22 standing dimensions, 20 sitting dimensions, and 15 foot and hand dimensions. Positive correlations were found between some of the body dimensions. The developed anthropometric data is expected to overcome the information gap related to the dimensions of the body of the elderly and to assist the development of products and other supporting equipment to be anthropometrically compatible for elderly residents of rural areas in the future.","PeriodicalId":509211,"journal":{"name":"Suranaree Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139354411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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