Pub Date : 2022-10-10DOI: 10.17509/ijost.v7i3.51325
A. Fristiohady, Rathapon Asasutjarit, L. Purnama, Sewan Theeramunkong, Wirhamsah Al-Ramadan, Lidya Agriningsih Haruna, Nurisma Rahmatika, S. Baharum, I. Sahidin
Melanoma skin cancer is a malignant melanocyte tumor considered the most invasive and dangerous skin cancer, with an average five-year survival rate of less than 5% after metastasis. Thus, a new strategy for preventing and treating cancer from the natural product is required. Medicinal plants are the potential as an alternative against cancer. This review article aims to determine natural products from medicinal plants which have the potential as an anticancer in melanoma skin cancer in vitro and in vivo. 40 plants have been selected based on the selection criteria for anticancer compounds. In vitro studies showed that the plant can reduce cell viability through cell cycle inhibition and apoptosis induction and inhibit angiogenesis, invasion, and metastasis in human melanoma skin cancer. Therefore, further research is required to explore more plants, especially medicinal plants, their active compounds, and the mechanism of anticancer action to be used as standard herbal medicines.
{"title":"Phytochemical Profile and Anticancer Activity from Medicinal Plants Against Melanoma Skin Cancer: A Review","authors":"A. Fristiohady, Rathapon Asasutjarit, L. Purnama, Sewan Theeramunkong, Wirhamsah Al-Ramadan, Lidya Agriningsih Haruna, Nurisma Rahmatika, S. Baharum, I. Sahidin","doi":"10.17509/ijost.v7i3.51325","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51325","url":null,"abstract":"Melanoma skin cancer is a malignant melanocyte tumor considered the most invasive and dangerous skin cancer, with an average five-year survival rate of less than 5% after metastasis. Thus, a new strategy for preventing and treating cancer from the natural product is required. Medicinal plants are the potential as an alternative against cancer. This review article aims to determine natural products from medicinal plants which have the potential as an anticancer in melanoma skin cancer in vitro and in vivo. 40 plants have been selected based on the selection criteria for anticancer compounds. In vitro studies showed that the plant can reduce cell viability through cell cycle inhibition and apoptosis induction and inhibit angiogenesis, invasion, and metastasis in human melanoma skin cancer. Therefore, further research is required to explore more plants, especially medicinal plants, their active compounds, and the mechanism of anticancer action to be used as standard herbal medicines.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76475514","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51520
F. Supriyanti, Dida Roslina, Z. Zackiyah, Islah Hanifa
This study aims to produce as well as analyze the sensory and antioxidant activity of fortified strawberry yogurt with cryoconcentration and pasteurization preparation methods. The results for the sensory test of strawberry fortified yogurt showed that the pasteurized yogurt is the best for taste and aroma because the use of heat when pasteurizing releases the aroma from strawberries. Reducing the water content using this method allows the strawberry flavor more concentrated. The cryoconcentration method allows the texture and color to be better than other methods. This is influenced by the use of low temperatures in the cryoconcentration method to maintain the anthocyanin content in strawberries which acts as a red pigment. The greater concentration of fortificants added results in higher antioxidant activity gained. Based on the IC100 value, the fortification of strawberries with the cryoconcentration method was significantly different from the pasteurization method in increasing the antioxidant activity of strawberry-fortified yogurt. The benefit of this research is to process milk into yogurt. Thus, it can be consumed by consumers with lactose intolerant sufferers. The addition of strawberries increases the antioxidants to prevent degenerative diseases. In addition, due to its simply design and production, this study is possibly used as a model in the practicum class.
{"title":"Strawberry-fortified Yogurt: Production, Sensory, Antioxidant Activity Test, and Model for Practicum","authors":"F. Supriyanti, Dida Roslina, Z. Zackiyah, Islah Hanifa","doi":"10.17509/ijost.v7i3.51520","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51520","url":null,"abstract":"This study aims to produce as well as analyze the sensory and antioxidant activity of fortified strawberry yogurt with cryoconcentration and pasteurization preparation methods. The results for the sensory test of strawberry fortified yogurt showed that the pasteurized yogurt is the best for taste and aroma because the use of heat when pasteurizing releases the aroma from strawberries. Reducing the water content using this method allows the strawberry flavor more concentrated. The cryoconcentration method allows the texture and color to be better than other methods. This is influenced by the use of low temperatures in the cryoconcentration method to maintain the anthocyanin content in strawberries which acts as a red pigment. The greater concentration of fortificants added results in higher antioxidant activity gained. Based on the IC100 value, the fortification of strawberries with the cryoconcentration method was significantly different from the pasteurization method in increasing the antioxidant activity of strawberry-fortified yogurt. The benefit of this research is to process milk into yogurt. Thus, it can be consumed by consumers with lactose intolerant sufferers. The addition of strawberries increases the antioxidants to prevent degenerative diseases. In addition, due to its simply design and production, this study is possibly used as a model in the practicum class.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84504756","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51449
B. Gunawan, Barito Mulyo Ratmono, Ade Gafar Abdullah, Nada Sadida, Hendra Kaprisma
This study aims to (1) determine research developments, (2) produce research distribution maps based on co-authorship analysis, (3) produce research distribution maps based on citation analysis, (4) produce research distribution maps based on co-citation analysis, (5) produce a research distribution map based on co-occurrence analysis, and (6) find out the state-of-the-art research in the use of technology for fake news detection. This study uses a quantitative method with a descriptive approach in bibliometric analysis from 2011 to 2021. From the research results obtained (1) the development of research publications in the field of the use of technology for fake news detection shows an increase, (2) the interrelationships between countries of authors, organizations affiliated with the authors, and among authors, (3) distribution map of citation analysis based on units of countries, sources, and authors, (4) distribution map of co-citation analysis based on unit cited sources and cited authors, (5) connection of keyword in the use of technology for fake news detection publications is related to literacy skills such as media literacy and information literacy, and (6) several research trends that researchers have widely used in the last 2 years including COVID-19, media literacy, and cyber deception. The research results can be used to determine the development of research o in the use of technology for fake news detection and as a reference for developing further research in the use of technology for fake news detection.
{"title":"Research Mapping in the Use of Technology for Fake News Detection: Bibliometric Analysis from 2011 to 2021","authors":"B. Gunawan, Barito Mulyo Ratmono, Ade Gafar Abdullah, Nada Sadida, Hendra Kaprisma","doi":"10.17509/ijost.v7i3.51449","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51449","url":null,"abstract":"This study aims to (1) determine research developments, (2) produce research distribution maps based on co-authorship analysis, (3) produce research distribution maps based on citation analysis, (4) produce research distribution maps based on co-citation analysis, (5) produce a research distribution map based on co-occurrence analysis, and (6) find out the state-of-the-art research in the use of technology for fake news detection. This study uses a quantitative method with a descriptive approach in bibliometric analysis from 2011 to 2021. From the research results obtained (1) the development of research publications in the field of the use of technology for fake news detection shows an increase, (2) the interrelationships between countries of authors, organizations affiliated with the authors, and among authors, (3) distribution map of citation analysis based on units of countries, sources, and authors, (4) distribution map of co-citation analysis based on unit cited sources and cited authors, (5) connection of keyword in the use of technology for fake news detection publications is related to literacy skills such as media literacy and information literacy, and (6) several research trends that researchers have widely used in the last 2 years including COVID-19, media literacy, and cyber deception. The research results can be used to determine the development of research o in the use of technology for fake news detection and as a reference for developing further research in the use of technology for fake news detection.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81249695","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51476
S. Luckyardi, R. Hurriyati, D. Disman, P. Dirgantari
The objectives of the review were to identify different implementation aspects of the Internet of Things (IoT) in Smart Universities (SU) from diverse studies, amplify the theories behind the IoT utilization and model in SU; as well as offer recommendations for future research in this area. This study employed a systematic literature review (SLR) technique, conducting comprehensive searches of the most relevant articles to the research question published from 2018 to 2022. Following a review of peer-reviewed journals, a total of 69 refereed articles were chosen and analyzed. The findings of this study suggest that the technology model needs to be aligned and integrated with organizational processes. IoT utilization should meet the adoption readiness of a university. The results also revealed that the creation of SU can be divided into three categories: behavior, learning, educational technology, and physical facilities. However, the literature related to IoT utilization and model is still incoherent and lacking in theoretical frameworks that reflect on specific circumstances such as SU. SU research is still in its early stages, with more work to be done in terms of identifying technology model adoption. The review also contributed to serving as inspiration and a point of reference for institutions as they work with the smart university initiative to create a teaching and learning environment that is more effective and efficient.
{"title":"A Systematic Review of the IoT in Smart University: Model and Contribution","authors":"S. Luckyardi, R. Hurriyati, D. Disman, P. Dirgantari","doi":"10.17509/ijost.v7i3.51476","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51476","url":null,"abstract":"The objectives of the review were to identify different implementation aspects of the Internet of Things (IoT) in Smart Universities (SU) from diverse studies, amplify the theories behind the IoT utilization and model in SU; as well as offer recommendations for future research in this area. This study employed a systematic literature review (SLR) technique, conducting comprehensive searches of the most relevant articles to the research question published from 2018 to 2022. Following a review of peer-reviewed journals, a total of 69 refereed articles were chosen and analyzed. The findings of this study suggest that the technology model needs to be aligned and integrated with organizational processes. IoT utilization should meet the adoption readiness of a university. The results also revealed that the creation of SU can be divided into three categories: behavior, learning, educational technology, and physical facilities. However, the literature related to IoT utilization and model is still incoherent and lacking in theoretical frameworks that reflect on specific circumstances such as SU. SU research is still in its early stages, with more work to be done in terms of identifying technology model adoption. The review also contributed to serving as inspiration and a point of reference for institutions as they work with the smart university initiative to create a teaching and learning environment that is more effective and efficient.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83271823","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51464
E. S. Soegoto, H. Soegoto, D. Soegoto, Suryatno Wiganepdo Soegoto, Agis Abhi Rafdhi, Herry Saputra, D. Oktafiani
The objectives of this paper are to analyze the implementation and architecture of the Internet of Things (IoT) from previous studies, specifically in the world of higher education; offer recommendations for future research, as well as strengthen the theory of IoT architecture that already exists in higher education. This study employed a systematic literature review (SLR) with data collection utilizing Funnel Diagrams to select articles based on their relevance to the research question. The three publisher databases (Scopus, Emerald, and EBSCO) and index journals were utilized in the search for articles. A total of 1,200 articles were gathered from these three sources, with distributions of up to 800 in Scopus, 150 in Emerald, and 250 in EBSCO. The findings demonstrate that the existing IoT architecture has a more sophisticated model than the fundamental idea, which has three layers, implying that using IoT in education may have a significant influence on user convenience. This is due to the increasingly complicated requirements of higher education's many business procedures. This study serves as an inspiration and reference for future research for higher education institutions that include the Internet of Things in their implementation to build an efficient teaching and learning environment.
{"title":"A systematic Literature Review of Internet of Things for Higher Education: Architecture and Implementation","authors":"E. S. Soegoto, H. Soegoto, D. Soegoto, Suryatno Wiganepdo Soegoto, Agis Abhi Rafdhi, Herry Saputra, D. Oktafiani","doi":"10.17509/ijost.v7i3.51464","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51464","url":null,"abstract":"The objectives of this paper are to analyze the implementation and architecture of the Internet of Things (IoT) from previous studies, specifically in the world of higher education; offer recommendations for future research, as well as strengthen the theory of IoT architecture that already exists in higher education. This study employed a systematic literature review (SLR) with data collection utilizing Funnel Diagrams to select articles based on their relevance to the research question. The three publisher databases (Scopus, Emerald, and EBSCO) and index journals were utilized in the search for articles. A total of 1,200 articles were gathered from these three sources, with distributions of up to 800 in Scopus, 150 in Emerald, and 250 in EBSCO. The findings demonstrate that the existing IoT architecture has a more sophisticated model than the fundamental idea, which has three layers, implying that using IoT in education may have a significant influence on user convenience. This is due to the increasingly complicated requirements of higher education's many business procedures. This study serves as an inspiration and reference for future research for higher education institutions that include the Internet of Things in their implementation to build an efficient teaching and learning environment.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74362141","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51315
S. Slamet, Laily F. Pelawi, M. Ibadurrohman, R. Yudianti, R. Ratnawati
We reported the simultaneous decolorization of tartrazine and H2 production via electrocoagulation and photocatalysis using CuO-doped TiO2 nanotube arrays (TNTA) composites. Tartrazine was removed by the combination of adsorption, electrocoagulation, and photocatalytic degradation, while H2 was produced through water reduction at the cathode and water splitting process on the photocatalyst surface. The photoreactor contains CuO-TNTA as a photocatalyst and is equipped with an 80-W UV lamp. Deposition of CuO on TNTA was conducted using a successive ionic layer adsorption and reaction (SILAR) method. The nanotubular of the TNTA as well as the distribution of CuO were evaluated employing FESEM and HRTEM. XRD patterns confirmed weak diffraction of CuO and TNTA revealing an anatase crystallite phase. The band gap of the CuO-TNTA was also found to be redshifted from that of pure TNTA. The simultaneous processes with the combined systems (20 V, pH = 11) managed to remove 80% of tartrazine while producing a high H2 yield (1.84 mmol), significantly higher than those obtained by each process.
{"title":"Simultaneous Decolorization of Tartrazine and Production of H2 in a Combined Electrocoagulation and Photocatalytic Processes using CuO-TiO2 Nanotube Arrays: Literature Review and Experiment","authors":"S. Slamet, Laily F. Pelawi, M. Ibadurrohman, R. Yudianti, R. Ratnawati","doi":"10.17509/ijost.v7i3.51315","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51315","url":null,"abstract":"We reported the simultaneous decolorization of tartrazine and H2 production via electrocoagulation and photocatalysis using CuO-doped TiO2 nanotube arrays (TNTA) composites. Tartrazine was removed by the combination of adsorption, electrocoagulation, and photocatalytic degradation, while H2 was produced through water reduction at the cathode and water splitting process on the photocatalyst surface. The photoreactor contains CuO-TNTA as a photocatalyst and is equipped with an 80-W UV lamp. Deposition of CuO on TNTA was conducted using a successive ionic layer adsorption and reaction (SILAR) method. The nanotubular of the TNTA as well as the distribution of CuO were evaluated employing FESEM and HRTEM. XRD patterns confirmed weak diffraction of CuO and TNTA revealing an anatase crystallite phase. The band gap of the CuO-TNTA was also found to be redshifted from that of pure TNTA. The simultaneous processes with the combined systems (20 V, pH = 11) managed to remove 80% of tartrazine while producing a high H2 yield (1.84 mmol), significantly higher than those obtained by each process.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82755140","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51288
T. M. Susantoro, S. Suliantara, H. Setiawan, B. Widarsono, K. Wikantika
Central Sumatra basin is located on Sumatra Island, Indonesia, and is considered an oil prolific basin that produces heavy oil. The basin is believed to have unexplored heavy oil potential. Therefore, this study aims to map the heavy oil potential distribution in the basin using surface and subsurface lineaments analyses interpreted from satellite imagery and gravity data, and assisted by well log/petrophysics analysis. A thorough basin analysis was conducted based on surface/subsurface structures’ control and source rock location settings to map all potential heavy oil traps. The gravity anomaly data interpretation identified the low areas and lineaments in NW – SE, and N – S directions. The interpretation of satellite imageries showed very similar lineament patterns with the same general direction. It was observed that there is continuity between subsurface and surface lineament features, which provide contact between reservoirs and surface water sources, thereby facilitating heavy oil generation. Overlapping the lineament interpretation of gravity and satellite imagery data, supported by petroleum system understanding and verification from wells data have confirmed 7 heavy oil trap potential areas within the sedimentary basin.
{"title":"Heavy Oil Potentials in Central Sumatra Basin, Indonesia Using Remote Sensing, Gravity, and Petrophysics Data: From Literature Review to Interpretations and Analyses","authors":"T. M. Susantoro, S. Suliantara, H. Setiawan, B. Widarsono, K. Wikantika","doi":"10.17509/ijost.v7i3.51288","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51288","url":null,"abstract":"Central Sumatra basin is located on Sumatra Island, Indonesia, and is considered an oil prolific basin that produces heavy oil. The basin is believed to have unexplored heavy oil potential. Therefore, this study aims to map the heavy oil potential distribution in the basin using surface and subsurface lineaments analyses interpreted from satellite imagery and gravity data, and assisted by well log/petrophysics analysis. A thorough basin analysis was conducted based on surface/subsurface structures’ control and source rock location settings to map all potential heavy oil traps. The gravity anomaly data interpretation identified the low areas and lineaments in NW – SE, and N – S directions. The interpretation of satellite imageries showed very similar lineament patterns with the same general direction. It was observed that there is continuity between subsurface and surface lineament features, which provide contact between reservoirs and surface water sources, thereby facilitating heavy oil generation. Overlapping the lineament interpretation of gravity and satellite imagery data, supported by petroleum system understanding and verification from wells data have confirmed 7 heavy oil trap potential areas within the sedimentary basin.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77505602","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.56368
Budi Santoso, T. Hikmawan, Nani Imaniyati
Decision-making in the organization always relates to the description of the results of the decisions taken. Therefore, every organization needs a management information system to assist in making various kinds of decisions needed. The purpose of this study was to determine the influence and effectiveness of management information systems on decision-making in the field of archives. The method used in this study is the explanatory survey method. Data collection techniques were carried out using questionnaires and product correlation moments. Data analysis was performed using simple regression analysis and hypothesis testing. The subjects of this study were 120 administrative employees in the city of Bandung. To support the analysis, this study also carried out a bibliometric analysis to determine trends in research development from information management systems to decision-making. Based on the findings, the quality of the management information system used is in the high category, as well as the effectiveness of decision-making is in the high category. Based on the results of hypothesis testing and significance, it can be interpreted that the management information system has a positive and significant effect on decision-making in the field of administration.
{"title":"Management Information Systems: Bibliometric Analysis and Its Effect on Decision Making","authors":"Budi Santoso, T. Hikmawan, Nani Imaniyati","doi":"10.17509/ijost.v7i3.56368","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.56368","url":null,"abstract":"Decision-making in the organization always relates to the description of the results of the decisions taken. Therefore, every organization needs a management information system to assist in making various kinds of decisions needed. The purpose of this study was to determine the influence and effectiveness of management information systems on decision-making in the field of archives. The method used in this study is the explanatory survey method. Data collection techniques were carried out using questionnaires and product correlation moments. Data analysis was performed using simple regression analysis and hypothesis testing. The subjects of this study were 120 administrative employees in the city of Bandung. To support the analysis, this study also carried out a bibliometric analysis to determine trends in research development from information management systems to decision-making. Based on the findings, the quality of the management information system used is in the high category, as well as the effectiveness of decision-making is in the high category. Based on the results of hypothesis testing and significance, it can be interpreted that the management information system has a positive and significant effect on decision-making in the field of administration.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89061609","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51453
M. Al-Samak, J. M. Jassim
The development of light-controlled electronic devices requires new possibilities of optical control via tuning of laser input parameters. Here, Fe3O4 superparamagnetic nanoparticles (SNPs) were doped with dye, and the controllability of parameters of a random laser, including the wavelength, threshold energy, and intensity under the absence and presence of an external magnetic field was studied. The prepared dye laser (Rh-640) showed strong magnetic controllability and switch ability under different pumping energies (1‒7 mJ), as well as good responsivity and durability at visible wavelengths. The applied magnetic field was utilized to modify the distribution of Fe3O4 SNPs with different concentrations and scattering behavior, altering the generation of coherent loops and laser action properties. Thus, it was possible to employ the magnetically controllable random laser in a variety of technological applications, including biology and optical communications
{"title":"Dye-Doped Fe3O4 Nanoparticles for Magnetically Controlling Random Laser Parameters at Visible Wavelengths: Literature Review and Experiment","authors":"M. Al-Samak, J. M. Jassim","doi":"10.17509/ijost.v7i3.51453","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51453","url":null,"abstract":"The development of light-controlled electronic devices requires new possibilities of optical control via tuning of laser input parameters. Here, Fe3O4 superparamagnetic nanoparticles (SNPs) were doped with dye, and the controllability of parameters of a random laser, including the wavelength, threshold energy, and intensity under the absence and presence of an external magnetic field was studied. The prepared dye laser (Rh-640) showed strong magnetic controllability and switch ability under different pumping energies (1‒7 mJ), as well as good responsivity and durability at visible wavelengths. The applied magnetic field was utilized to modify the distribution of Fe3O4 SNPs with different concentrations and scattering behavior, altering the generation of coherent loops and laser action properties. Thus, it was possible to employ the magnetically controllable random laser in a variety of technological applications, including biology and optical communications","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"91 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74647260","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 : 2022-10-10DOI: 10.17509/ijost.v7i3.51566
S. Jamilatun, J. Pitoyo, Shinta Amelia, A. Ma’arif, D. C. Hakika, I. Mufandi
Sugarcane bagasse is one of the most abundant biomasses. This study aims to examine the characteristics of bagasse using a pyrolysis system to produce liquid, solid (Biochar), and gaseous. A fixed bed reactor was installed in pyrolysis with temperature variations from 300 to 600°C. The ultimate and proximate analysis was applied to evaluate the characteristic of bagasse. The experimental result found that the maximum bio-oil was obtained at a temperature of 550°C. Several characterizations were done, including gas chromatography and surface area analysis. The Levoglucosan compound of 78% area. The temperature effect on pyrolysis influenced the O/C ratio, H/C ratio, HHV value, and surface area of biochar. The High Heating Value was obtained from 16.698 to 18.496 kJ/kg. Biochar results indicated that the surface area, average pore size, and total pore volume are 180.3-198.0 m2/g, 1.42-4.33 nm, and 0.11-0.12 nm, respectively. The study also analyzed its composition in biochar.
{"title":"Experimental Study on The Characterization of Pyrolysis Products from Bagasse (Saccharum Officinarum L.): Bio-oil, Biochar, and Gas Products","authors":"S. Jamilatun, J. Pitoyo, Shinta Amelia, A. Ma’arif, D. C. Hakika, I. Mufandi","doi":"10.17509/ijost.v7i3.51566","DOIUrl":"https://doi.org/10.17509/ijost.v7i3.51566","url":null,"abstract":"Sugarcane bagasse is one of the most abundant biomasses. This study aims to examine the characteristics of bagasse using a pyrolysis system to produce liquid, solid (Biochar), and gaseous. A fixed bed reactor was installed in pyrolysis with temperature variations from 300 to 600°C. The ultimate and proximate analysis was applied to evaluate the characteristic of bagasse. The experimental result found that the maximum bio-oil was obtained at a temperature of 550°C. Several characterizations were done, including gas chromatography and surface area analysis. The Levoglucosan compound of 78% area. The temperature effect on pyrolysis influenced the O/C ratio, H/C ratio, HHV value, and surface area of biochar. The High Heating Value was obtained from 16.698 to 18.496 kJ/kg. Biochar results indicated that the surface area, average pore size, and total pore volume are 180.3-198.0 m2/g, 1.42-4.33 nm, and 0.11-0.12 nm, respectively. The study also analyzed its composition in biochar.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77714835","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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