Jurnal Teknosains最新文献

Integrated microcontroller mq sensors for monitoring biogas: Advancements in methane and hydrogen sulfide detection 用于监测沼气的集成微控制器 mq 传感器：甲烷和硫化氢检测技术的进步

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.91936

I. Gede, Artha Negara, Daud Simon, Anakottapary Ida, Bagus Gde, Widiantara Luh, Putu Ike, Midiani, Tjokorda Gde, Tirta Nindhia, Gusti Ngurah, Nitya Santhiarsa

{"title":"Integrated microcontroller mq sensors for monitoring biogas: Advancements in methane and hydrogen sulfide detection","authors":"I. Gede, Artha Negara, Daud Simon, Anakottapary Ida, Bagus Gde, Widiantara Luh, Putu Ike, Midiani, Tjokorda Gde, Tirta Nindhia, Gusti Ngurah, Nitya Santhiarsa","doi":"10.22146/teknosains.91936","DOIUrl":"https://doi.org/10.22146/teknosains.91936","url":null,"abstract":"Recent technological advances in microcontroller systems enable novel biogas monitoring capabilities. This study investigates microcontroller-based quantification of methane and hydrogen sulfide concentrations in biogas derived from anaerobic digestion. Anaerobic digesters were fed either 100% cow dung substrates or a 50:50 mixture of cow dung with municipal solid waste (MSW). Methane levels were monitored using an MQ-4 sensor, hydrogen sulfide via an MQ-136 sensor, and temperature with a K-type thermocouple, all integrated with an ATmega 2560 microcontroller system. The 100% cow dung digester produced biogas with maximum methane concentrations of 3488 ppm at 21 days, indicating improved methane production compared to the 50:50 mixture of cow dung with MSW. Hydrogen sulfide reached 195 ppm and 192 ppm for the 100% cow dung and mixed digesters. Mesophilic temperature conditions were maintained throughout the digestion process. Real-time quantification of biogas composition demonstrates the capabilities of microcontroller-based anaerobic digester monitoring to provide precise methane and hydrogen sulfide measurements.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"113 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124296","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}

引用次数: 0

Comparison of physical and acceptability tests of extra oral suction in rsgm ugm prof. Soedomo Rsgm ugm 教授口腔外吸痰法的物理测试和可接受性测试比较苏德茂

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.92290

Dian Permata Sari, Danang Sri Wibowo

{"title":"Comparison of physical and acceptability tests of extra oral suction in rsgm ugm prof. Soedomo","authors":"Dian Permata Sari, Danang Sri Wibowo","doi":"10.22146/teknosains.92290","DOIUrl":"https://doi.org/10.22146/teknosains.92290","url":null,"abstract":"The spread of COVID-19 through aerosols and droplets occurs during dental treatment. Dentists use high-volume suction (HVS) and saliva ejectors to suction saliva, blood, and water from the oral cavity. Since the pandemic, prototyping, production, and use of extraoral suction (EOS) have increased. EOS comprises HEPA (High-Efficiency Particulate Air), plasma ions, and ultraviolet (UV) filters. This study was used to see the effectiveness of the use of EOS through a comparison of physical and acceptability tests on the use of EOS at UGM Prof. Sodeomo Dental Hospital using three EOS brands, Coxo™, Eighteeth™ Vacstation, and Eostra™. Physical Test is used to assess the ability of a tool when used—Acceptability Test to assess user acceptance of EOS based on usage experience. The study was conducted at the UGM Prof. Soedomo Hospital (Professional Education Clinic, Resident Education Clinic, General Service Unit, and Specialistic Service Unit) in 2021 with 90 respondents who were EOS users. The EOS with the most incredible suction power, noise figure, and electrical power was Eostra™, while based on user experience, the EOS that was more accepted and more comfortable for users to use was Coxo™. EOS reduces aerosol exposure during dental treatment, and based on this study, EOS that had good capacity was not necessarily comfortable to use by users; this was because each brand had advantages and disadvantages, so the selection of EOS was adjusted to the capacity of the operator and the practice site.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"123 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141123805","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}

引用次数: 0

Refinement of cooking oil using activated carbon from coconut shell and zeolite 使用椰壳活性炭和沸石精炼食用油

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.91766

Ety Jumiati

{"title":"Refinement of cooking oil using activated carbon from coconut shell and zeolite","authors":"Ety Jumiati","doi":"10.22146/teknosains.91766","DOIUrl":"https://doi.org/10.22146/teknosains.91766","url":null,"abstract":"Bulk cooking oil is obtained from traditional markets and and relatively has a characteristic color that tends to be brownish and unclear; cooking oil has been repeatedly used after frying, resulting in physical changes such as darkening, thickening, and foaming. If bulk cooking oil is repeatedly used for frying, it can be detrimental to health as it may accumulate saturated fatty acids in the oil. This condition prompted the search for solutions to purify bulk cooking oil and use cooking oil using processed zeolite and coconut shell-activated carbon as adsorbents to improve the quality of cooking oil. This research utilizes an experimental-quantitative method. Variations in composition include sample A (bulk cooking oil: 75% and processed natural zeolite: 25%), sample B (bulk cooking oil: 75% and coconut shell activated carbon: 25%), sample C (used cooking oil: 75% and processed natural zeolite: 25%), and sample D (used cooking oil: 75% and coconut shell activated carbon: 25%). The research results on the quality of coconut shell activated carbon obtain moisture content of 13.2%, ash content of 2.1%, volatile matter content of 17.9%, and carbon content of 80.0%, which meets the SNI 06-3730-1995 standard. Meanwhile, the quality results of cooking oil after the purification process obtain moisture content values of 0.09-0.10%, free fatty acid values of 0.14-0.30%, and normal color that does not exceed the maximum standard required by SNI 7709:2019 with a percentage reduction in moisture content of 0-60% and free fatty acids of 0-63.41%.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"114 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124131","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}

引用次数: 0

Kinetic and combustion characteristics of oil palm empty fruit bunch biochar using thermogravimetric analysis 利用热重分析法分析油棕空果束生物炭的动力学和燃烧特性

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.89413

Indah Sakina Pansawati, Yustika Agustin, Yusuf Ahda

{"title":"Kinetic and combustion characteristics of oil palm empty fruit bunch biochar using thermogravimetric analysis","authors":"Indah Sakina Pansawati, Yustika Agustin, Yusuf Ahda","doi":"10.22146/teknosains.89413","DOIUrl":"https://doi.org/10.22146/teknosains.89413","url":null,"abstract":"The usage of renewable energy is a mitigation phenomenon majorly impacting the power sectors, with biomass being one of the sources directly replacing coal in various applications. This leads to the portrayal of biomass having the potential to be a carbonaceous material, namely the Empty Fruit Bunch (EFB) of oil palm. To increase the characteristics of EFB, it can be converted into carbon-based products through thermochemical processes, such as hydrothermal carbonization. Therefore, this study aimed to compare the characteristics of feedstock and biochar EFB using the TGA method. The heating rate used in this study is 10 – 30°C/min at five °C/min intervals. The effect of heating rate on kinetic parameters and thermal (DTG, TGA) and combustion (T ignition, T burn out) characteristics was also determined. This study carried out the HTC process at temperatures of 210ᵒC and 230ᵒC. The results showed that biochar EFB had a higher ignition, burnout temperature, and activation energy than raw EFB. Ignition temperatures for EFB-HT210°C and EFB-HT230°C were 297°C and 298°C; burnout temperatures for EFB-HT210°C, EFB-HT230°C were 407°C and 450°C; and the activation energy for EFB-HT210°C, EFB-HT230°C were 58.84 kJ/mol and 62.16 kJ/mol. Besides the characteristics of biomass, the heating rate also affects combustion. This proved that increased heating rate caused higher ignition and burnout temperature and decreased activation energy. The results also indicated that the difference in heating rate influenced the peak temperature in DTG.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"31 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141123658","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}

引用次数: 0

Development of an innovation ecosystem model in handling the covid-19 in Indonesia 在印度尼西亚开发处理科维-19 病毒的创新生态系统模型

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.93252

Isyalia Dwi Handayani, Hakimul Ikhwan, E. Pangaribowo

引用次数: 0

Kinetic optimization of angkak – red ginger extraction and its impact on antioxidant activity 红姜提取的动力学优化及其对抗氧化活性的影响

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.86975

Felesia Missy, Andhi Fahrurroji, Fajar Nugraha, Desy Siska Anastasia

{"title":"Kinetic optimization of angkak – red ginger extraction and its impact on antioxidant activity","authors":"Felesia Missy, Andhi Fahrurroji, Fajar Nugraha, Desy Siska Anastasia","doi":"10.22146/teknosains.86975","DOIUrl":"https://doi.org/10.22146/teknosains.86975","url":null,"abstract":"A mixture of angkak and red ginger is a Chinese herbal concoction with potential as an antioxidant. This herbal combination can be extracted using the kinetic hot maceration method by optimizing the stirring speed to be more efficient. Previous studies have shown that using 400, 600, and 800 rpm stirring speeds provides the best IC50 and yield. Based on these problems, this research aims to determine the effect of increasing stirring speed on IC50 and % yield in the extraction of angkak and red ginger, as well as prove the benefits of this herbal combination through the IC50 value. The method used is extracting a mixture of angkak and red ginger at kinetic variations of 400, 600, and 800 rpm using a magnetic hotplate stirrer at a temperature of 60ºC for 2 hours; determination of % yield; determining the chromatogram profile using TLC; determination of antioxidant activity using DPPH; as well as data analysis of percentage yield and IC50 using SPSS. Analysis using SPSS shows that the stirring speed significantly affects the % yield, where increasing the moving speed above 400 rpm results in a decrease in the % yield. However, the moving speed does not affect the IC50. The TLC chromatogram profile shows the presence of 6-gingerol compounds in angkak and red and yellow pigment compounds in red ginger, which have potential as antioxidants. The optimization results in this study obtained optimal % yield and IC50 at 400 rpm with average values, respectively, namely 15.933 ± 3.4771% and 103.76 ± 10.032 ppm, and the combination of angkak and red ginger ingredients can work synergistically to increase yield and antioxidant.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"30 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124004","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}

引用次数: 0

Fabrication of pbs films for air mass filter of solar simulator 为太阳能模拟器的空气质量过滤器制作 pbs 薄膜

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.88846

Isom Hilmi, D. Y. Kusuma, H. Soetedjo, Q. Hidayah, Umi Salamah

{"title":"Fabrication of pbs films for air mass filter of solar simulator","authors":"Isom Hilmi, D. Y. Kusuma, H. Soetedjo, Q. Hidayah, Umi Salamah","doi":"10.22146/teknosains.88846","DOIUrl":"https://doi.org/10.22146/teknosains.88846","url":null,"abstract":"The production of solar panels is continuously increasing due to increasing demands at industrial and residential levels. This also leads to an increasing demand for solar simulator testing tools. A solar simulator is a tool to assess a solar panel's performance in lab and industry scales. One of the main components of the solar simulator is the Air Mass Filter (AMF). The primary function of AMF is to remove unwanted wave bands from the solar simulator light source (e.g., Xe arc lamp) so that the filtered spectrum is commensurate to that of solar irradiation. An AMF can be produced by fabricating a thin material layer on a transparent substrate like glass. The film would absorb certain wave bands in different ways. This paper reports the fabrication of the chalcogenide PbS thin films for applying AMF. The thermal evaporation technique is used for the film fabrication. PbS is known for its versatility for applications in different optical devices due to its tailorable optical properties. Different amounts (in grams) of PbS source powders are used to deposit the PbS thin films. The optical properties of the films are then examined using UV-Vis spectroscopy. The distributions of the transmittance intensity of the Xe-arc-lamp light with and without the use of the films as an optical filter are then examined using a solar simulator. From the experiments, the film deposited using a 0.012 g PbS powder source is regarded as the optimum one regarding the transmittance intensity distribution.","PeriodicalId":506417,"journal":{"name":"Jurnal Teknosains","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141123765","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}

引用次数: 0

Impacts of temperature and coating pigment ratios on the corrosion rate of ss400 steel 温度和涂料颜料比对 SS400 钢腐蚀速率的影响

Jurnal Teknosains Pub Date : 2024-05-19 DOI: 10.22146/teknosains.85518

Untung Budiarto, A. Firdhaus, Muhammad Luqman Hakim, T. Tuswan, Fauzan Ammar Fata Yusuf

引用次数: 0

Combination effectiveness of glucomannan and moringa oleifera leaf extract on lipid profil of hypercholesterolemia rats 葡甘聚糖和油橄榄叶提取物对高胆固醇血症大鼠血脂状况的联合疗效

Jurnal Teknosains Pub Date : 2023-12-10 DOI: 10.22146/teknosains.82693

Dini Prastyo Wati, Endang Setyaningsih

引用次数: 0

Microsoft building footprint application To detect human exposure due to tsunami 微软建筑足迹应用程序检测海啸对人类的影响

Jurnal Teknosains Pub Date : 2023-12-10 DOI: 10.22146/teknosains.79526

Andes Saragi, D. Mardiatno, Emma Hisbaron

引用次数: 0