Pub Date : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.18539
Y. Setiyo, B. A. Harsojuwono, Ida Bagus Wayan Gunam, Ida Bagus Putu Gunadnya, I. G. N. Apriadi Aviantara, I. G. A. Lani Triani
This research aimed to evaluate the effectiveness of various diffusers in a bioreactor for producing liquid organic fertilizer (LOF) using cow urine and slurry organic waste as materials. LOF was produced by treating the organic waste with Urine-Single Orifice Diffuser (USOD), Urine-Coarse Bubble Diffuser (UCBD), Urine-Fine Bubble Diffuser (UFBD), Slurry-Single Orifice Diffuser (SSOD), Slurry-Coarse Bubble Diffuser (SCBD), and Slurry-Fine Bubble Diffuser (SFBD) in a bioreactor equipped with a water pump and an external aerator unit. The pump circulated and agitated the biomass at a discharge of 10 L/min. Meanwhile, the external aerator unit pumped air into the bioreactor, which the biomass absorbed at a discharge of 45 L/min. The discharge of biomass and water also caused agitation of the fermented biomass. Several variables were observed during the fermentation process, including temperature, acidity (pH), total dissolved solids (TDS), C/N ratio, electrical conductivity (EC), biological oxygen demand (BOD), microbial population, cation exchange capacity (CEC), and other chemical properties. LOF produced had a pH, temperature, total organic matter content, EC, TDS, BOD, microbial population, and CEC values of 6.3–6.8, 28.0–37.0°C, 20.77–22.46%, 54630–62369.24 µmS, 7543–11700 ppm, 1.2–2.6 mg/L, 3.2–7.5 log CFU, 12.3–14.1, and 29.98 me/100 g, respectively. The macro and micro nutrient contents of bio-urine were 12.72–12.96%, and 3.09–3.25%. Meanwhile, those of the bio-slurry were 12.35–12.99% and 2.39–2.72%. These characteristics of LOF were in accordance with the Indonesian National Standard (SNI).
{"title":"PERFORMANCE OF BUBBLE COLUMN BIOREACTOR TO PRODUCE LIQUID ORGANIC FERTILIZER (LOF) FROM COW URINE AND SLURRY ORGANIC WASTE","authors":"Y. Setiyo, B. A. Harsojuwono, Ida Bagus Wayan Gunam, Ida Bagus Putu Gunadnya, I. G. N. Apriadi Aviantara, I. G. A. Lani Triani","doi":"10.11113/jurnalteknologi.v85.18539","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.18539","url":null,"abstract":"This research aimed to evaluate the effectiveness of various diffusers in a bioreactor for producing liquid organic fertilizer (LOF) using cow urine and slurry organic waste as materials. LOF was produced by treating the organic waste with Urine-Single Orifice Diffuser (USOD), Urine-Coarse Bubble Diffuser (UCBD), Urine-Fine Bubble Diffuser (UFBD), Slurry-Single Orifice Diffuser (SSOD), Slurry-Coarse Bubble Diffuser (SCBD), and Slurry-Fine Bubble Diffuser (SFBD) in a bioreactor equipped with a water pump and an external aerator unit. The pump circulated and agitated the biomass at a discharge of 10 L/min. Meanwhile, the external aerator unit pumped air into the bioreactor, which the biomass absorbed at a discharge of 45 L/min. The discharge of biomass and water also caused agitation of the fermented biomass. Several variables were observed during the fermentation process, including temperature, acidity (pH), total dissolved solids (TDS), C/N ratio, electrical conductivity (EC), biological oxygen demand (BOD), microbial population, cation exchange capacity (CEC), and other chemical properties. LOF produced had a pH, temperature, total organic matter content, EC, TDS, BOD, microbial population, and CEC values of 6.3–6.8, 28.0–37.0°C, 20.77–22.46%, 54630–62369.24 µmS, 7543–11700 ppm, 1.2–2.6 mg/L, 3.2–7.5 log CFU, 12.3–14.1, and 29.98 me/100 g, respectively. The macro and micro nutrient contents of bio-urine were 12.72–12.96%, and 3.09–3.25%. Meanwhile, those of the bio-slurry were 12.35–12.99% and 2.39–2.72%. These characteristics of LOF were in accordance with the Indonesian National Standard (SNI).","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44371296","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.18334
Seth Bedu Rockson, Madihah Md Rasid, M. S. Anuar, S. M. Hussin, N. Rosmin, N. M. Nordin, M. Gyan
Conventional power generation is one of the main contributors to the phenomenon of the greenhouse effect. This has led to a diversification of electricity sources including environmentally friendly energy sources such as solar energy. Off-grid PV systems have gained some traction due to their cost-effectiveness for rural communities. However, the intermittent nature of solar is the main challenge to developing the off-grid PV system. Moreover, the high capital cost of PV systems as well as the storage batteries becomes the main concern for all PV users. Thus, this study aims to optimize the size of the PV system and battery simultaneously and design a cost-effective off-grid photovoltaic system considering various aspects such as battery power, solar irradiance, and PV panel selection while ensuring system reliability. The proposed system was optimized using improved Differential Evolution (DE) and its effectiveness was tested by comparing the results with Particle Swarm Optimization (PSO) and Genetic Algorithm (GA). The Improved DE algorithm provides the highest average cost savings compared to other algorithms, which is $500 per year. It is recommended that this method is very useful in the optimization of off-grid PV systems, considering other uncertainties that affect PV system performance.
{"title":"DESIGNING TECHNO-ECONOMIC OFF-GRID PHOTOVOLTAIC SYSTEM USING AN IMPROVED DIFFERENTIAL EVOLUTION ALGORITHM","authors":"Seth Bedu Rockson, Madihah Md Rasid, M. S. Anuar, S. M. Hussin, N. Rosmin, N. M. Nordin, M. Gyan","doi":"10.11113/jurnalteknologi.v85.18334","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.18334","url":null,"abstract":"\u0000\u0000\u0000\u0000Conventional power generation is one of the main contributors to the phenomenon of the greenhouse effect. This has led to a diversification of electricity sources including environmentally friendly energy sources such as solar energy. Off-grid PV systems have gained some traction due to their cost-effectiveness for rural communities. However, the intermittent nature of solar is the main challenge to developing the off-grid PV system. Moreover, the high capital cost of PV systems as well as the storage batteries becomes the main concern for all PV users. Thus, this study aims to optimize the size of the PV system and battery simultaneously and design a cost-effective off-grid photovoltaic system considering various aspects such as battery power, solar irradiance, and PV panel selection while ensuring system reliability. The proposed system was optimized using improved Differential Evolution (DE) and its effectiveness was tested by comparing the results with Particle Swarm Optimization (PSO) and Genetic Algorithm (GA). The Improved DE algorithm provides the highest average cost savings compared to other algorithms, which is $500 per year. It is recommended that this method is very useful in the optimization of off-grid PV systems, considering other uncertainties that affect PV system performance.\u0000\u0000\u0000\u0000","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41598510","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.19827
Khairunnisa Abdul Lateef Khan, Zainoodin Sheik Abdul Kader
Typhoid fever is an endemic disease that has been acknowledged as a major global health burden. Typhoid fever is a neglected re-emerging infectious disease that is transmitted through fecal oral route. Nevertheless, non-typhoidal Salmonella outbreak has been increasing globally with large number of cases involving immunocompromised individuals. The clinical diagnosis of typhoid is difficult due to the overlapping symptoms of typhoid fever, non-typhoidal Salmonella, and other associated febrile diseases, which causes to delayed treatment. Herein, this study aims to provide a reproducible, discriminative protein fingerprint of two different Salmonella serovars using a differential extraction procedure comprising of whole cell protein (WCP), cell surface protein (CSP) and surface-depleted whole cell protein (sdWCP) derived from whole cell bacterial protein of Salmonella Typhi (S.Typhi) and Salmonella spp (S.spp). In the present research, we perform comparative analysis to characterize protein profiles of two differentially extracted Salmonella serovars by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and dendrogram analysis. The findings showed that the proteins were reproducible in optimized concentration. Separation of protein into three different extractions revealed discriminative protein profiles with major and micro-heterogenicity. We observed the diverseness of differentially extracted proteins between two strains which provided an effective adjunct that can be used in identification of Salmonella strains. The results achieved when differential extraction procedure was applied, provides a promising, future opportunity for further immunoproteomic classifications.
{"title":"COMPARATIVE PROTEIN PROFILE ANALYSIS OF DIFFERENTIALLY EXTRACTED WHOLE CELL BACTERIAL PROTEIN DERIVED FROM SALMONELLA TYPHI AND INVASIVE NON-TYPHOIDAL SALMONELLA","authors":"Khairunnisa Abdul Lateef Khan, Zainoodin Sheik Abdul Kader","doi":"10.11113/jurnalteknologi.v85.19827","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19827","url":null,"abstract":"Typhoid fever is an endemic disease that has been acknowledged as a major global health burden. Typhoid fever is a neglected re-emerging infectious disease that is transmitted through fecal oral route. Nevertheless, non-typhoidal Salmonella outbreak has been increasing globally with large number of cases involving immunocompromised individuals. The clinical diagnosis of typhoid is difficult due to the overlapping symptoms of typhoid fever, non-typhoidal Salmonella, and other associated febrile diseases, which causes to delayed treatment. Herein, this study aims to provide a reproducible, discriminative protein fingerprint of two different Salmonella serovars using a differential extraction procedure comprising of whole cell protein (WCP), cell surface protein (CSP) and surface-depleted whole cell protein (sdWCP) derived from whole cell bacterial protein of Salmonella Typhi (S.Typhi) and Salmonella spp (S.spp). In the present research, we perform comparative analysis to characterize protein profiles of two differentially extracted Salmonella serovars by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and dendrogram analysis. The findings showed that the proteins were reproducible in optimized concentration. Separation of protein into three different extractions revealed discriminative protein profiles with major and micro-heterogenicity. We observed the diverseness of differentially extracted proteins between two strains which provided an effective adjunct that can be used in identification of Salmonella strains. The results achieved when differential extraction procedure was applied, provides a promising, future opportunity for further immunoproteomic classifications.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42128123","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.19107
Nurul Hasyimah Mohd Mustapha, Muhammad Rusydi Muhammad Razif, S. H. Nasir, Ili Najaa Aimi Mohd Nordin
This research presents preliminary characterization studies for a stretchable conductive sensor. It was developed specifically to detect strain changes that occur including flex changes. Some issues in conventional strain measurement are found to be less suitable due to the inaccuracy to measure the strain for an elongation using a flexible curve ruler, especially strain related to angle changes. Therefore, a study on the development of a stretchable conductive sensor is required. This initial study will focus on characterizing the suitability of fabric materials and thread patterns to develop a sensor that will be used to measure stretch more accurately. In this study, conductive yarns were constructed with two types of stretchable fabrics having different percentages of spandex elements. The thread will be sewn to the side of the fabric in two of the fabric states, namely course (horizontal) and wales (vertical). For both conditions, five (5) similar samples were sewn for 8% and 15% spandex fabric. Preliminary results found that the best sensor performance was a fabric containing 15% spandex material with conductive threads sewn along the horizontal orientation of the fabric. In a study on resistance varying with the tension applied to the sensor, model D showed the best performance when stretched up to a force of 4 N. The resistance shown by the sensor varies from 47MΩ to 66MΩ relative to the applied force from 0 N to 4 N. The results of this preliminary study are expected to be used in widespread measurement applications.
{"title":"DEVELOPMENT OF A STRETCHABLE CONDUCTIVE SENSOR FOR FLEXIBLE DEFORMATION: A PRELIMINARY STUDY","authors":"Nurul Hasyimah Mohd Mustapha, Muhammad Rusydi Muhammad Razif, S. H. Nasir, Ili Najaa Aimi Mohd Nordin","doi":"10.11113/jurnalteknologi.v85.19107","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19107","url":null,"abstract":"This research presents preliminary characterization studies for a stretchable conductive sensor. It was developed specifically to detect strain changes that occur including flex changes. Some issues in conventional strain measurement are found to be less suitable due to the inaccuracy to measure the strain for an elongation using a flexible curve ruler, especially strain related to angle changes. Therefore, a study on the development of a stretchable conductive sensor is required. This initial study will focus on characterizing the suitability of fabric materials and thread patterns to develop a sensor that will be used to measure stretch more accurately. In this study, conductive yarns were constructed with two types of stretchable fabrics having different percentages of spandex elements. The thread will be sewn to the side of the fabric in two of the fabric states, namely course (horizontal) and wales (vertical). For both conditions, five (5) similar samples were sewn for 8% and 15% spandex fabric. Preliminary results found that the best sensor performance was a fabric containing 15% spandex material with conductive threads sewn along the horizontal orientation of the fabric. In a study on resistance varying with the tension applied to the sensor, model D showed the best performance when stretched up to a force of 4 N. The resistance shown by the sensor varies from 47MΩ to 66MΩ relative to the applied force from 0 N to 4 N. The results of this preliminary study are expected to be used in widespread measurement applications.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47046808","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.19200
Faiqah Faisal, Norinah Abdul Rahman, Norashikin Ahmad Kamal
The work presented in this paper includes a field investigation of road traffic noise between residential and construction areas in a selected urban area. The aim of this study was to assess the level of noise pollution from road traffic noise in Seri Kembangan, Selangor. Therefore, this study included measurements of traffic noise level, evaluation of the percentage traffic volume between residential and construction areas; and identification of the correlation between traffic volume and traffic noise level. An EXTECH 407764 sound level meter was used to take noise level measurements for 1 hour and 30 minutes in one-minute intervals at both study sites. The parameter collected in the noise level monitoring was average noise level (LAeq). The traffic volume study was conducted using manual counts for 30 minutes. Four types of vehicles were counted, namely cars, vans, motorcycles, and heavy vehicles. Based on statistical analysis, it can be concluded that both sites had high traffic noise levels which exceeded the maximum permissible limit of 60 dBA during daytime, according to Malaysian guidelines, due to several factors. The findings show that road infrastructure such as noise barriers need to be further implemented, especially in residential areas. Mitigation of noise pollution must be further carried out by contractors. Additionally, further investigations need to be conducted by the relevant authorities to reduce the level of noise which may affect the quality of life for the communities in the area.
{"title":"ASSESSMENT OF ROAD TRAFFIC NOISE IN SELECTED URBAN RESIDENTIAL AND CONSTRUCTION AREAS","authors":"Faiqah Faisal, Norinah Abdul Rahman, Norashikin Ahmad Kamal","doi":"10.11113/jurnalteknologi.v85.19200","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19200","url":null,"abstract":"The work presented in this paper includes a field investigation of road traffic noise between residential and construction areas in a selected urban area. The aim of this study was to assess the level of noise pollution from road traffic noise in Seri Kembangan, Selangor. Therefore, this study included measurements of traffic noise level, evaluation of the percentage traffic volume between residential and construction areas; and identification of the correlation between traffic volume and traffic noise level. An EXTECH 407764 sound level meter was used to take noise level measurements for 1 hour and 30 minutes in one-minute intervals at both study sites. The parameter collected in the noise level monitoring was average noise level (LAeq). The traffic volume study was conducted using manual counts for 30 minutes. Four types of vehicles were counted, namely cars, vans, motorcycles, and heavy vehicles. Based on statistical analysis, it can be concluded that both sites had high traffic noise levels which exceeded the maximum permissible limit of 60 dBA during daytime, according to Malaysian guidelines, due to several factors. The findings show that road infrastructure such as noise barriers need to be further implemented, especially in residential areas. Mitigation of noise pollution must be further carried out by contractors. Additionally, further investigations need to be conducted by the relevant authorities to reduce the level of noise which may affect the quality of life for the communities in the area.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49477760","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.19653
Saleh Suliman Saleh Elfallah
Gas metal arc welding is a leading process in fusion welding with increased productivity and good quality. The welding parameters are crucial in determining welding quality, cost, and productivity. In this study, mild steel with a 10-mm-thick sheet was welded by gas metal arc welding under predetermined parameters of welding voltage, wire feed speed, and groove shape. The analysis made by Taguchi’s design to investigate the effect of these parameters on tensile strength and Vickers micro-hardness of welding. The microstructure of the fusion zone and heat-affected zone is analyzed to monitor their change concerning the mechanical properties. The results showed that tensile strength decreased with decreased hardness. Also, the tensile strength and hardness were higher (a maximum of 305 MPa and 2170 HVN) at welding made at a lower voltage (20 volts), lower wire feed speed (5.9 m/min), and V-shaped base metal groove. The increased precipitation of perlite structure was shown during welding, which has lower tensile strength and hardness. Widmanstatten ferrite and coarser α-ferrite were presented for welding with a lower cooling time. Taguchi’s design showed that voltage at 20 volts has the highest effect on tensile strength, followed by wire feed speed at 5.9 m/min and V-shaped welding.
{"title":"STUDY THE INFLUENCE OF WELDING PARAMETERS BY TAGUCHI’S DESIGN ON THE MECHANICAL PROPERTIES OF WELDED MILD STEEL (S235JR)","authors":"Saleh Suliman Saleh Elfallah","doi":"10.11113/jurnalteknologi.v85.19653","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19653","url":null,"abstract":"Gas metal arc welding is a leading process in fusion welding with increased productivity and good quality. The welding parameters are crucial in determining welding quality, cost, and productivity. In this study, mild steel with a 10-mm-thick sheet was welded by gas metal arc welding under predetermined parameters of welding voltage, wire feed speed, and groove shape. The analysis made by Taguchi’s design to investigate the effect of these parameters on tensile strength and Vickers micro-hardness of welding. The microstructure of the fusion zone and heat-affected zone is analyzed to monitor their change concerning the mechanical properties. The results showed that tensile strength decreased with decreased hardness. Also, the tensile strength and hardness were higher (a maximum of 305 MPa and 2170 HVN) at welding made at a lower voltage (20 volts), lower wire feed speed (5.9 m/min), and V-shaped base metal groove. The increased precipitation of perlite structure was shown during welding, which has lower tensile strength and hardness. Widmanstatten ferrite and coarser α-ferrite were presented for welding with a lower cooling time. Taguchi’s design showed that voltage at 20 volts has the highest effect on tensile strength, followed by wire feed speed at 5.9 m/min and V-shaped welding.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48994013","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 : 2023-06-25DOI: 10.11113/jurnalteknologi.v85.19244
Gia-Buu Tran, Thanh-Minh Thi Ngo
Black shallot is the newly developed food product from shallot (Allium ascalonicum), which is characterized by dark brown color, sweet taste and jelly texture. However, the effect of thermal treatment on physicochemical properties, bioactive compounds, antioxidant activity has not been assessed yet. In this study, we determined the changes of some physicochemical properties (reducing sugar, pH, moisture, and acidity), polyphenols, and its antioxidant activity (via DPPH radical scavenging assay) during aging process at three different temperatures (60, 70, 80oC) with sampling intervals 3 days for a 21-day period. All thermal treatment conditions gradually reduced the moisture and pH versus increased the acidity, reducing sugar, total polyphenol content, and antioxidant activity. The optimal conditions to produce the antioxidant and polyphenols - enriched black shallot were 70oC for 18 days (63.95 ± 1.24 % and 52.86 ± 2.02 mg of GAE/g DW, respectively). These findings not only gives the basis for the optimization of processing for improvement food quality with desired attributes but also suggests black shallot as the promising source to extract bioactive compounds for application in pharmaceutical and food industry.
{"title":"THE EFFECT OF THERMAL TREATMENT ON ANTIOXIDANT AND PHYSICOCHEMICAL PROPERTIES OF BLACK SHALLOT (ALLIUM ASCALONICUM)","authors":"Gia-Buu Tran, Thanh-Minh Thi Ngo","doi":"10.11113/jurnalteknologi.v85.19244","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v85.19244","url":null,"abstract":"Black shallot is the newly developed food product from shallot (Allium ascalonicum), which is characterized by dark brown color, sweet taste and jelly texture. However, the effect of thermal treatment on physicochemical properties, bioactive compounds, antioxidant activity has not been assessed yet. In this study, we determined the changes of some physicochemical properties (reducing sugar, pH, moisture, and acidity), polyphenols, and its antioxidant activity (via DPPH radical scavenging assay) during aging process at three different temperatures (60, 70, 80oC) with sampling intervals 3 days for a 21-day period. All thermal treatment conditions gradually reduced the moisture and pH versus increased the acidity, reducing sugar, total polyphenol content, and antioxidant activity. The optimal conditions to produce the antioxidant and polyphenols - enriched black shallot were 70oC for 18 days (63.95 ± 1.24 % and 52.86 ± 2.02 mg of GAE/g DW, respectively). These findings not only gives the basis for the optimization of processing for improvement food quality with desired attributes but also suggests black shallot as the promising source to extract bioactive compounds for application in pharmaceutical and food industry.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47066803","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 : 2023-06-24DOI: 10.34151/jurtek.v16i1.4341
Bella Salsabila Cahyani, Eris Klarisa, Ivena Salcea, Rakha Hakiem Sinatrya, M. M. Alfather, Manajemen Agribisnis, Sekolah Vokasi, Institut Pertanian Bogor
Appropriate strategies in retail management are very important to win the increasingly fierce retail industry competition, one of which is by implementing a retail business layout design. Abdidaya Mart is a retailer that provides goods for daily equipment. This study was conducted to analyze the route planning of product components to achieve the most efficient and economical flow between the movement of people, equipment, and materials by implementing a layout strategy. The analytical method used is the activity relationship chart (ARC) which focuses on analyzing the interrelationships between activities in the retail business and the total closeness rating (TCR) which focuses on the degree of proximity of each facility and department to the Abdidaya Mart retail business to determine the first priority in retail development. The ARC results show that several rooms absolutely must be close together, such as the cashier's room and the display room. The TCR value indicates the sequence of rooms that are prioritized in development, namely display space with a value of 198, a cashier with a value of 190, seats with a value of 109, warehouse with a value of 136, and toilets with a value of 37. Layout solution shows the arrangement of rooms described as the result of research This. The retail business layout design is useful for facilitating retail in managing efficient layout positions and can reduce the density of movement activities that occur in retail.
{"title":"Analisis Perancangan Tata Letak Ritel Abdidaya Mart dengan Metode Total Closeness Rating (TCR)","authors":"Bella Salsabila Cahyani, Eris Klarisa, Ivena Salcea, Rakha Hakiem Sinatrya, M. M. Alfather, Manajemen Agribisnis, Sekolah Vokasi, Institut Pertanian Bogor","doi":"10.34151/jurtek.v16i1.4341","DOIUrl":"https://doi.org/10.34151/jurtek.v16i1.4341","url":null,"abstract":"Appropriate strategies in retail management are very important to win the increasingly fierce retail industry competition, one of which is by implementing a retail business layout design. Abdidaya Mart is a retailer that provides goods for daily equipment. This study was conducted to analyze the route planning of product components to achieve the most efficient and economical flow between the movement of people, equipment, and materials by implementing a layout strategy. The analytical method used is the activity relationship chart (ARC) which focuses on analyzing the interrelationships between activities in the retail business and the total closeness rating (TCR) which focuses on the degree of proximity of each facility and department to the Abdidaya Mart retail business to determine the first priority in retail development. The ARC results show that several rooms absolutely must be close together, such as the cashier's room and the display room. The TCR value indicates the sequence of rooms that are prioritized in development, namely display space with a value of 198, a cashier with a value of 190, seats with a value of 109, warehouse with a value of 136, and toilets with a value of 37. Layout solution shows the arrangement of rooms described as the result of research This. The retail business layout design is useful for facilitating retail in managing efficient layout positions and can reduce the density of movement activities that occur in retail.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44174639","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 : 2023-06-19DOI: 10.34151/jurtek.v16i1.4328
Andre Viola, Mohammad Jufriyanto, E. Priyana
Quality of service as one of the efforts of PT. Era Krazu Energi Nusantara to continuously improve the quality of all processes, services and products produced. Based on the results of interviews with customers, complaints related to service quality and customer satisfaction are influenced by several factors, apart from product quality and price, the most important of which are service quality and personal factors that annoy individual customers. The results of the study using the Service Quality and Importance Performance Analysis methods, on the quality of service, it is known that there are several attributes indicating that the current quality of service is still not as expected by customers. Based on the calculation of Gap 5 from the service quality questionnaire, the highest results were obtained and had an effect on service quality, namely attribute X4 with a gap value of -0.33823, which is a strategic location attribute. Based on Importance Performance Analysis, the highest value is obtained from the attribute value in quadrant I at X7 (Employees' willingness to handle complaints quickly), and X11 (Employees are honest with consumers).
服务质量作为PT. Era Krazu Energi Nusantara的努力之一，不断提高所有流程、服务和产品的质量。根据客户访谈的结果，与服务质量和客户满意度相关的投诉受到几个因素的影响，除了产品质量和价格，其中最重要的是服务质量和个人因素惹恼了个别客户。使用服务质量和重要性绩效分析方法的研究结果表明，在服务质量上，已知有几个属性表明当前的服务质量仍然没有达到客户的预期。根据服务质量问卷的Gap 5计算，得到对服务质量影响最大的属性X4，其Gap值为-0.33823，为战略区位属性。根据重要性绩效分析，第一象限的属性值在X7(员工快速处理投诉的意愿)和X11(员工对消费者诚实)处获得最高值。
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Pub Date : 2023-06-15DOI: 10.34151/jurtek.v16i1.4335
Dewi Arianti Wulandari, Wandy Wandy
Sport is primarily a mental and physical activity focused on competition with oneself, others, or the elements of nature—the contribution of sport to the modern world's social development, the nation, and the state. As history has shown, technical advancements have never diminished sports and linked to civilization's advancement in human life. Walking and bicycling are increasingly promoted as active modes of transportation and boosting physical activity levels. The elevated breathing rates in traffic microenvironments have generated worries about increased exposure to ultrafine particles. Amateur half marathoners did detrimental significantly when the temperature, heat index, and ozone levels rise. The athlete or recreational sportsperson can earn environmental information through several channels and devices. There are applications and widgets now embedded or separated from the device operating systems. This research aimed to find appropriate environmental information from recreational sportspeople's understanding and awareness of the environment's effect on sports performance. Walking (77) and running (48) were the most sports activities picked by the respondents. Then 99 (73%) respondents used environmental data before exercising. Weather (118) was the respondents' choice, followed by the temperature (47) and the air quality (30) picked by the respondents. Most respondents (72%) get environmental information from their smartphones, and 27 (18%) get it from the website. Environmental factors may impact sports activity performance, and the respondents used environmental information before the sports activities began. This research will later support the sports information system web application.
{"title":"Survey Response Analysis on the Use of Environmental Data for Sports Information Systems Development","authors":"Dewi Arianti Wulandari, Wandy Wandy","doi":"10.34151/jurtek.v16i1.4335","DOIUrl":"https://doi.org/10.34151/jurtek.v16i1.4335","url":null,"abstract":"Sport is primarily a mental and physical activity focused on competition with oneself, others, or the elements of nature—the contribution of sport to the modern world's social development, the nation, and the state. As history has shown, technical advancements have never diminished sports and linked to civilization's advancement in human life. Walking and bicycling are increasingly promoted as active modes of transportation and boosting physical activity levels. The elevated breathing rates in traffic microenvironments have generated worries about increased exposure to ultrafine particles. Amateur half marathoners did detrimental significantly when the temperature, heat index, and ozone levels rise. The athlete or recreational sportsperson can earn environmental information through several channels and devices. There are applications and widgets now embedded or separated from the device operating systems. This research aimed to find appropriate environmental information from recreational sportspeople's understanding and awareness of the environment's effect on sports performance. Walking (77) and running (48) were the most sports activities picked by the respondents. Then 99 (73%) respondents used environmental data before exercising. Weather (118) was the respondents' choice, followed by the temperature (47) and the air quality (30) picked by the respondents. Most respondents (72%) get environmental information from their smartphones, and 27 (18%) get it from the website. Environmental factors may impact sports activity performance, and the respondents used environmental information before the sports activities began. This research will later support the sports information system web application.","PeriodicalId":47541,"journal":{"name":"Jurnal Teknologi-Sciences & Engineering","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48228171","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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