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A simple approach for curcumin extraction from turmeric roots

AIP Conference Proceedings 2022年第1期2537卷 040016页

作者： Siti Fauziyah Rahman Adella Josephin Ridha Alviny Syakirah Grace Priscilla Nadia Wulandari Nurul Intan Yudan Whulanza Biomedical Engineering Study Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

Turmeric, particularly its most active ingredient, curcumin, has a long list of scientifically documented health advantages, including the ability to boost heart health and protect against a variety of diseases. Curcumin is one of the most important active components in turmeric, with a wide range of bioactivity and medicinal uses. Preparing samples from biological components is a time-consuming and difficult operation. This study aims to understand the process of extracting curcumin from turmeric and to analyze the appropriate solvent for curcumin extraction. The method used is Soxhlet extraction with acetone and ethanol as solvents. The analysis of curcumin content was carried out using a UV-Vis spectrophotometer. The results showed that the curcumin extracted with acetone solvent had a higher concentration than the extraction with ethanol. Therefore, extracting curcumin from turmeric using the Soxhlet method, acetone is a superior solvent than ethanol.

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The Implementation of Occupational Safety and Health (OSH) in Practical Courses of the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University

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Journal of Physics: Conference Series 2018年第1期1140卷

作者： M Munir S A Dewanto B Wulandari Electronics Engineering Education Study Program Faculty of Engineering Yogyakarta State University Indonesia

Occupational Safety and Health (OSH) is a part of the practical courses in educational institutions. This research was aimed at investigating: (1) students' knowledge of OSH used in practical courses, (2) students' attitudes toward OSH, and (3) the implementation of OSH in practical courses in the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University. It is a non-experimental study employing a quantitative descriptive approach. This study was conducted in the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University from February to June 2018. The subject of this study included students, lecturers, and technicians. Students' knowledge of OSH in practical courses in the Electronics study program is good (74.2%). Their attitudes toward OSH are also good (92.2%). Although some students do not implement OSH procedures when conducting practical courses, the implementation of OSH in the study program is categorized good (63.3%). Furthermore, more intensive studies on the importance OSH implementation in practical courses needs to done.

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A Cluster-Based Method for Improving Water Depth Estimation from Satellite Derived Bathymetry

A Cluster-Based Method for Improving Water Depth Estimation ...

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2020 International Conference on Data Science and Its Applications, ICoDSA 2020

作者： Meliala, Litany Juliansah, Tabah Adytia, Didit Sidiq, Teguh Purnama Windupranata, Wiwin Poerbandono Institut Teknologi Bandung Geodesy and Geomatics Engineering Study Program Bandung Indonesia Telkom University School of Computing Bandung Indonesia Institut Teknologi Bandung Geodesy Research Group Faculty of Earth Sciences and Technology Bandung Indonesia Institut Teknologi Bandung Hydrography Research Group Faculty of Earth Sciences and Technology Bandung Indonesia

ISBN: (纸本)9781728182353

In this presented paper, an effort to improve the accuracy of the bathymetric model derived from optical satellite imagery is discussed. According to the previous study, the accuracy approximately measures in 2 m for depth up to 10 m by means of the Global Bathymetric Inversion Methods. Therefore, the improvement is done based on the so-called Cluster-Based Method applied to the analytical and log-ratio methods. The Cluster-Based Method partitions the working area on the by classifying the errors between the known depths and the predicted ones. The data for the known and predicted depths are acquired from the in-situ survey and the Sentinel-2 imagery. Improvement by one-third to the accuracy of the resulting bathymetry is obtained. © 2020 IEEE.

关键词： Bathymetry

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Novel insights into curcumin adsorption: Kinetics and mechanisms of decolorization using Pondoh snake fruit seed biochar

Next Research

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Next Research 2025年第2期2卷

作者： Wilna Iznilillah Mohamad Ali Fulazzaky Arti Hastuti Asep Bayu Dani Nandiyanto Meli Fiandini Khalida Muda Faculty of Halal Food Science Universitas Djuanda Jalan Tol Ciawi No 1 Ciawi Bogor 16720 Indonesia Study Program of Environmental Science Faculty of Engineering and Science Universitas Ibn Khaldun Bogor Jalan Sholeh Iskandar Kedungbadak Bogor 16162 Indonesia Faculty of Mathematics and Natural Science Education Universitas Pendidikan Indonesia Jalan Dr Setiabudhi No 229 Bandung 40154 Indonesia Faculty of Civil Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Bahru Malaysia

Utilizing natural waste materials to decolorize synthetic and natural dyes offers a promising solution for mitigating environmental pollution. The adsorption isotherms and decolorization kinetics of curcumin onto Pondoh snake fruit seed (PSFS) biochar were predicted using ten isotherm models and the Generalized Fulazzaky (GF) equations, respectively, providing insights into the behavioral characteristics of the adsorption process. Simulations using the Harkin-Jura model demonstrated a good fit, with R ² values exceeding 0.6909 across PSFS biochar granular sizes of 13.65, 25.49, and 65.13 μm, indicating capillary condensation and multilayer adsorption, which validates the GF equations’ applicability. Applying the GF equations to adsorption kinetics simulations showed that declining external mass transfer (EMT) rates were offset by increasing internal mass transfer (IMT) rates. The increase in IMT rates ([ k L a ] d < 0.0 min −1 ) was less pronounced than the decrease in EMT rates ([ k L a ] f > 0.0 min −1 ), suggesting IMT governs curcumin adsorption’s rate-limiting step. PSFS biochar with an average granular size of 25.49 μm proved most effective for decolorizing 100 mg L −1 curcumin, exhibiting a global mass transfer rate range of 0.0020 to 0.0079 min −1 . Utilizing PSFS biochar for curcumin removal contributes to sustainable environmental remediation by advancing green technologies and informing dye effluent management strategies.

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Renewable pro-environmental and energy design of environmentally friendly behavior in Central Java

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IOP Conference Series: Materials Science and engineering 2021年第5期1098卷

作者： H Hamiyati N Nadiroh A Neolaka Family Welfare Education Study Program Faculty of Engineering Universitas Negeri Jakarta Jakarta Indonesia Civic education Study Program Faculty of Social Science Universitas Negeri Jakarta Jakarta Indonesia Civil Engineering Study Program Faculty of Engineering Universitas Negeri Jakarta Jakarta Indonesia

Energy in Indonesia is increasing rapidly every year in line with economic involvement, and human growth that is getting more and more energy is not fulfilled every year. Indonesia is among the most energy users because of its population; this is what drives the government to accelerate the use of renewable energy such as solar. This is related to its use, which can help many people who live in cities and remote areas such as; Electricity in households, public facilities, offices, electricity is said to be the most environmentally friendly. This research was conducted in Central Java by using descriptive qualitative methods and using research and development (R&D) methods. The technique used in this study is a qualitative expressive analysis technique. The resultant solution is to be able to meet the increasing electricity needs of the community, the use of renewable energy in the city that does not hurt the environment. This research produces renewable energy that can be used as a solution to solving the electrical energy crisis at an affordable cost and can increase the independence of the community so that it does not depend on government electricity supply and improve environmentally-friendly behavior.

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Sweat sensing in wearable sensor: A review of the future non-invasive technology for real-time health monitoring system

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AIP Conference Proceedings 2022年第1期2537卷

作者： Elly Septia Yulianti Nurul Intan Siti Fauziyah Rahman Basari 1Biomedical Engineering Study Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia 2Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

Wearable sensors are devices used in the diagnostic process for real-time health monitoring systems. Types of sensors are generally based on physical sensors and chemical sensors. However, the types of wearable sensors that are largely commercialized are limited to physical sensors. Some diagnostic processes generally use the blood collecting method to determine a patient’s condition. However, this method can cause adverse effects such as infection, pain, and bruising for some patients. chemical-based wearable sensors are capable of detecting metabolic conditions in the body and can be an alternative to the existing method. Based on an approach using alternative analytes, sweat is the most frequently used because it is highly accessible and proceeds good parameters compared to the blood. Several studies related to wearable sensors using sweat have been done to increase convenience during the sampling process. Electrochemical, biosensor, and hybrid with several sampling methods, including microfluidic system, absorbent material, superhydrophobic-super hydrophilic surface, and iontophoresis, can be used for wearable sensor analysis method. Over the past decade, the characteristics of wearable sensors (i.e., selectivity, sensitivity, stability, and response time), textile materials, and biofuel cell technology for self-powered sensor development have also increased. From these classifications, it can be concluded that the method which is highly feasible to be developed is electrochemical wearable sensors that combine microfluidic and iontophoresis systems. The system is also expected to have stretchable material and is equipped with an integrated biofuel cell system that has the potential to be developed in our upcoming research topic.

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Design of BCI motor imagery classification using WPT-CSP and CNN

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AIP Conference Proceedings 2022年第1期2537卷

作者： Dio Alif Pradana Basari 1Biomedical Engineering Study Program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia 2Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

This study proposes a new method in an electroencephalograph (EEG)-based Brain-Computer Interface (BCI) that can directly utilize brain signals to control external devices. The motor Imagery (MI) signal, which contains an image of a certain limb movement, is generally used in BCI. It does not need direct movements. The implementation of MI-EEG signal into BCI still experiences major issues because the patterns obtained for each recording can vary from one another even though they have the same type of motion. In this study, we utilized the Wavelet Packet Transform (WPT) method to decompose the EEG signal into specific sub-band frequencies and Common Spatial Pattern (CSP) as a spatial filter to increase the spatial resolution of the EEG signal. The Convolutional Neural Network (CNN) was subsequently selected for training from the classifier. Next, the results of the training were used to classify the movements of the given MI-EEG. We evaluated the model using dataset 2a from Brain-Computer Interface Competition (BCIC) IV. The results of this method showed the increase in the accuracy of 32% and in Kappa up to 0.42 and the decrease in Root Mean Square Error (RMSE) up to 1.21, compared with only using CNN as the classifier. These results showed fairly good performance compared to other methods used previously in dataset 2a from BCIC IV.

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The effect of fiber volume fraction on tensile and impact properties of eleusine indica grass reinforced polypropylene bio composite 1

The effect of fiber volume fraction on tensile and impact pr...

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1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Lokantara, I.P. Suardana, N.P.G. Surata, I.W. Winaya, I.N.S. Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department Udayana University Street of Bukit Jimbaran Bali Badung Indonesia

The purpose of this research was to investigate the tensile strength and impact strength of eleusine indica grass fiber-reinforced polypropylene recycle composite. In this study, the fiber was treated with alkali at 5% NaOH for 2 hours. The eleusine indica grass fiber cut with a length of 3 cm and the matrix used recycle polypropylene. In this research, the volume fraction of eleusine indica grass fiber varied by 20%, 25%, and 30% respectively. The composite molded with a hot press at temperature 200°C with a holding time for 2 hours. Tensile test used ASTM D3039 and impact test used ASTM D256. The highest tensile and impact strength results on fiber volume fraction 30%. © Published under licence by IOP Publishing Ltd.

关键词： Polypropylenes

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Analysis of changes in gas turbine compressor operation in gas processing station from parallel to series using aspen hysys

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AIP Conference Proceedings 2024年第1期3073卷

作者： Patria Suryatmaja Hafid Alwan Indar Kustiningsih Yazid Bindar Master’s Program in Chemical Engineering Postgraduate School Universitas Sultan Ageng Tirtayasa Jl. Jenderal Sudirman KM. 3 Cilegon 42435 Indonesia. Chemical Engineering Department Universitas Sultan Ageng Tirtayasa Jl. Jenderal Sudirman KM. 3 Cilegon 42435 Indonesia Chemical Engineering Department Industrial Technology Faculty Institut Teknologi Bandung Jl. Ganesa No. 10 Bandung 40132 Indonesia

Parallel compressor gas operation mode is used when the natural gas pressure is still sufficient with one compression stage to reach high pressure; if the gas feed pressure is below the compressor design pressure, it is necessary to increase the pressure to two stages. The purpose of this study was to analyze the effect of changing the gas turbine compressor operating mode from parallel to series due to a decrease in gas well pressure. The ability of a compressor to compress gases under its design pressure can be simulated with a simulator. Parallel compressor operation can be simulated as two-stage compression by being connected in series using the ASPEN HYSYS. The simulation results of the compressor suction pressure drop from 318 psig to 200 psig at the compressor unit at the natural gas processing station of PT. Z show the compressor performance curve is still stable and far from the surge line when used in series operation mode. Recalculation of the surface facilities of the separator and scrubber units shows that the fluid retention is still under 5 minutes, the velocity and momentum of the fluid in the vessels are still below the maximum capacity of the equipment, and the required cooling load is still below the available duty coolers. In the piping system, when operating under compressor design pressure, the fluid velocity value is still below the pipe erosion velocity (for two-phase flow), while for single-phase flow it is below 60 ft/s for the gas phase and 15 ft/s for the liquid phase. Based on the simulation carried out and recalculation of the feasibility of surface facilities, changing the compressor operating mode from parallel to series is feasible and can be carried out safely.

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Energy Balance Calculation with Life Cycle Assessment for Production of Palm Biodiesel in Indonesia 4

Energy Balance Calculation with Life Cycle Assessment for Pr...

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4th International Conference on Energy, Environment, Epidemiology and Information System, ICENIS 2019

作者： Wahyono, Yoyon Hadiyanto, H. Budihardjo, Mochamad Arief Widayat Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Energy balance analysis study for the production process of biodiesel needs to be done to find out whether a production process of biodiesel activity has a surplus energy or minus energy. This study aims to analyse the balance of energy of the plantation of palm, production of palm oil, and production process units of biodiesel with the life cycle assessment in Banyuasin-Indonesia. The results of this study indicate that the largest energy input in the plantation of palm, production of palm oil, and production process units of biodiesel sequentially is the use of urea as N-fertilizer, electricity, and methanol. The value of NEB and NER in the production process of palm biodiesel sequentially is 5871 MJ and 1.17. Finally, the production process of palm biodiesel in Banyuasin area has a positive energy balance. The activity of production of palm biodiesel is proper to operate because it produces an energy surplus. © The Authors, published by EDP Sciences, 2019.

关键词： Life cycle

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