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Optimization of ultrasonic extraction parameters for enhanced total flavonoid content from Jengkol peel

AIP Conference Proceedings 2024年第1期3215卷

作者： Amanda Emilia Rafifah Hasna Rita Arbianti Tania Surya Utami Bioprocess Engineering Study Program Department of Chemical Engineering Faculty of Engineering University of Indonesia Kampus UI – Depok West Java Indonesia 16436

Jengkol, a commonly consumed food ingredient, is frequently utilized without its outer layer. However, the outer peel of the jengkol fruit harbors a multitude of secondary metabolites that hold potential as bioinsecticides. Among these compounds, flavonoids stand out as toxic to insects. The quantification of flavonoid content within jengkol peel extracts is denoted as TFC (Total Flavonoid Content). Employing ultrasonic wave extraction, the conversion of jengkol peel into bioinsecticides can be facilitated. This research employs ultrasonic wave extraction, utilizing an ethanol solvent, with a frequency of 53 kHz and a temperature of 40℃. Through systematic variation of sonication duration and solvent concentration, this investigation scrutinizes the impact of these variables on TFC values and extracts yields. The assessment of TFC is conducted using UV-Vis spectrophotometry and referencing a quercetin standard solution. Optimal TFC output, specifically 1.643±0.026 mg QE/g of dried jengkol peel extract, is achieved at a 60-minute extraction period using 70% ethanol solvent. Liquid Chromatography-Mass Spectrometry (LCMS) analysis identifies various compounds with bioinsecticidal potential, including phenolic acids, fatty acids, flavonoids, phytoalexins, and coumarins, exhibiting the highest TFC levels. Employing ANOVA analysis followed by a post hoc LSD (Least Significance Different) test, it is evident with 95% confidence that both extraction time and solvent concentration significantly influence flavonoid content within jengkol peel extracts.

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Adaptive Fuzzy Sliding Mode Control With Logarithmic Sliding Surface for Active Suspension Systems

Adaptive Fuzzy Sliding Mode Control With Logarithmic Sliding...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Andika Aji Wijaya Fitri Yakub Winda Astuti Mahmud Iwan Solihin S. Syafiie Department of Mechanical Engineering University of Business and Technology (UBT) Jeddah Saudi Arabia Department of Electronic Systems Engineering University of Technology Malaysia (UTM) Kuala Lumpur Malaysia Department of Computer Engineering BINUS ASO School of Engineering Automotive and Robotics Program Bina Nusantara University (BINUS) Jakarta Indonesia Department of Mechanical and Mechatronics Engineering UCSI University Kuala Lumpur Malaysia Department of Chemical and Materials Engineering Faculty of Engineering-Rabigh King Abdulaziz University Jeddah Saudi Arabia

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

This paper introduces a hybrid control strategy that integrates the unique features of natural logarithm sliding mode control (lnSMC) and fuzzy logic systems. The lnSMC control approach ensures that the vibration amplitude remains within a bound, as determined by the parameters of the lnSMC switching function. Furthermore, the fuzzy logic system is employed to approximate the nonlinearities and uncertainties inherent in the suspension system components, such as the spring and damper. The stability of the closed-loop system is analyzed using the Lyapunov stability theorem, guaranteeing convergence within a finite time. To validate the effectiveness of the proposed controller, a simulation study was carried out using a quarter-car suspension model, considering the system’s nonlinearities, parameter uncertainties, and various external disturbances. The results indicate that the proposed controller significantly improves ride comfort while maintaining suspension deflection and road holding within critical safety limits.

关键词： Fuzzy logic Vibrations Uncertain systems Uncertainty Roads Switches Stability analysis Vehicle dynamics Springs Sliding mode control

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Long Short Term Memory Networks for Stroke Activity Recognition base on Smartphone 5

Long Short Term Memory Networks for Stroke Activity Recognit...

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5th IEEE International Conference on Information Technology, Information Systems and Electrical engineering, ICITISEE 2021

作者： Siagian, Pandapotan Fernando, Erick Del Institute Of Technology Faculty Of Informatics And Electrical Engineering Computer Engineering Study Program North Sumatera 22381 Indonesia Bina Nusantara University School Of Information Systems Information Systems Department Jakarta11480 Indonesia

ISBN: (纸本)9781665401968

Aims this study to analyze rehabilitation exercises using sensor data embedded in smartphones is widely used to recognize human activities regularly to gain a better understanding of human behavior. However, it is rarely used to measure accelerators of patient movement in hospital wards. This paper proposes an optimized neural network-based feature extraction approach based on the Long Short Term Memory technique to recognize human activity using data from a tri-axial accelerometer. The activity to be measured is the Range of Motion for patient rehabilitation, and rehabilitation exercises are one of the most important steps for recovery. The results of the softmax regression trained on the dataset set have 1, 076, 105 records and 12 class attributes (class distribution). The experimental results on the SAR dataset show that our Long Short Term Memory-based approach is practical and successful, with an accuracy of 89.74%. © 2021 IEEE.

关键词： Smartphones

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Industry 5.0 and sustainability: An overview of emerging trends and challenges for a green future

Innovation and Green Development

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Innovation and Green Development 2024年第4期3卷

作者： Rame, Rame Purwanto, Purwanto Sudarno, Sudarno Doctorate Program in Environmental Science School of Postgraduate Studies Universitas Diponegoro Semarang 50241 Indonesia Center for Standardization and Industrial Pollution Prevention Services Ministry of Industry Indonesia Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang 50275 Indonesia Department of Environmental Engineering Faculty of Engineering Universitas Diponegoro Semarang 50275 Indonesia

In an era of climate change and increasing global environmental challenges, the importance of integrating sustainability principles into the latest industrial revolution, Industry 5.0, is becoming increasingly critical. This revolution marks a turning point from an industrial approach that focuses on efficiency and automation, to a paradigm that prioritizes collaboration between humans and machines, innovation, and harmonization with the environment. This research examines the dynamic intersection between Industry 5.0 and sustainability, emphasizing how this evolution aims to integrate human creativity and expertise with advanced technological capabilities. This report identifies emerging trends and challenges, with a focus on achieving a sustainable future through innovative practices that balance economic growth and environmental management. This article uses a literature review and multidisciplinary analysis to uncover the untapped potential of Industry 5.0 technologies in driving sustainability initiatives. It aims to enrich academic discourse with fresh insights into aligning these technologies with environmental and social goals, thereby offering practical implications for policy makers, industry leaders and sustainability practitioners. © 2024 The Author(s)

关键词： Economic growth Environmental stewardship Industry 5.0 Innovation practices Sustainability Technological integration

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The effect of artificial support material existence on removal of organic and nutrient in laboratory scale using plug flow reactor (PFR) 6

The effect of artificial support material existence on remov...

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6th Environmental Technology and Management Conference, ETMC 2019

作者： Aphirta, Sarah Soewondo, Prayatni Maisa Zakiyya, Nida Wulandari Putri, Dyah Setiani Muntalif, Barti Environmental Engineering Master Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Indonesia Program Study of Environmental Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Indonesia

Artificial support material was examined to determine the removal capacity of organic pollutants and nutrients on laboratory scale using PFR system. The experiment was performed using artificial water with similar characteristics to Cikapayang River in three PFRs of 10.78 L. The PFRs were made of PVC pipes filled with an inert chemical substrate as an artificial support material. The process of pollutants removal in the PFR relies on a biological layer (biofilm) grown on the surface of the material support. Three type of C:N:P ratio used in this study were 30:15:1, 75:25:2, and 180:35:3. The results showed that the maximum removal efficiency of TSS, TN, TP, and COD in the preliminary tests were 85%, 87%, 71% and 79%, respectively. Moreover, the maximum water absorption capacity result was up to 30.8%. Organic substrate removal rate compared with first order and Strover-Kincannon substrate removal models prediction. The best fit model for this experiment was Stover-Kincannon model, with the average correlation coefficient up to 90% for all of the three reactors. SEM analysis shown that the microorganisms shape is coccus with the average size of 5 μm. © 2020 The Authors, published by EDP Sciences.

关键词： Nutrients

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Highly efficient two-electron electroreduction of oxygen into hydrogen peroxide over Cu-doped TiO_(2)

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Nano Research 2022年第5期15卷 3880-3885页

作者： Zhiqin Deng Li Li Yuchun Ren Chaoqun Ma Jie Liang Kai Dong Qian Liu Yonglan Luo Tingshuai Li Bo Tang Yang Liu Shuyan Gao Abdullah MAsiri Shihai Yan Xuping Sun Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China School of Materials Science and Engineering Henan Normal UniversityXinxiang 453007China Chemistry Department Faculty of Science&Center of Excellence for Advanced Materials ResearchKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

Electrosynthesis of hydrogen peroxide(H2O_(2)),as a sustainable alternative to the anthraquinone oxidation method,provides the feasibility of directly generating H_(2)O_(2).Here,we report Cu-doped TiO_(2) as an efficient electrocatalyst which exhibits the excellent two-electron oxygen reduction reaction(2e-ORR)performance with respect to the pristine TiO_(2).The Cu doping results in the distortion of TiO_(2) lattice and further forms a large number of oxygen vacancies and Ti^(3+).Such Cu-doped TiO_(2) exhibits a positive onset potential about 0.79 V and high H_(2)O_(2) selectivity about 91.2%.Moreover,it also shows a larger H_(2)O_(2) yield and good *** functional theory(DFT)calculations reveal that Cu dopant not only improves the electrical conductivity of pristine TiO_(2) but reduces the*OOH adsorption energy of active sites,which is beneficial to promote subsequently 2e-ORR process.

关键词： Cu-doped TiO_(2) oxygen vacancy Ti^(3+) two-electron oxygen reduction reaction hydrogen peroxide

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Used cooking oil catalytic cracking using Cr-charcoal ion-exchanged catalyst 6

Used cooking oil catalytic cracking using Cr-charcoal ion-ex...

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6th International Conference on Mathematics, Science, and Education, ICMSE 2019

作者： Nazarudin Ulyarti Alfernando, O. Fitri, S. Chemistry Engineering Study Program Faculty of Engineering Universitas Jambi Indonesia Chemistry Education Study Program Faculty of Teacher Training and Education Universitas Jambi Indonesia Center of Energy and Nanomaterial Study Universitas Jambi Indonesia

Used cooking oil is the largest waste that can be converted into biofuel as a renewable alternative energy source with catalytic cracking process. In this study, used cooking oil was cracked using a Cr-Carbon catalyst. The charcoal was produced from solid waste (shell) of oil palm industry. Three different chromium concentrations (1, 2, and 3%) were used for the ion-exchange process of Cr-charcoal to produce the catalyst. These catalysts were used for the catalytic cracking of used cooking oil at three levels of temperature (450, 500, and 550°C). X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were used for catalyst characterization. SEM-energy dispersive X-ray spectroscopy (EDX) analysis indicates that Cr was successfully adsorbed into the catalyst. The highest oil fraction was obtained from catalytic cracking of used cooking oil at 450°C using Cr-charcoal catalyst synthesized using 1% Cr solution. © Published under licence by IOP Publishing Ltd.

关键词： Catalysts

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The Use of Geogebra Software in Learning Geometry Transformation to Improve Students' Mathematical Understanding Ability 2

The Use of Geogebra Software in Learning Geometry Transforma...

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2nd International Conference on Computer, Science, engineering, and Technology, ICComSET 2019

作者： Ridha, Moch. Rasyid Pramiarsih, Euis Eka Widjajani Mathematic Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Economic Education Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Industrial Engineering Study Program Faculty of Engineering Universitas Langlangbuana Bandung Indonesia

This article reports the findings of one pretest-posttest design experiment with the control group and with GeoGebra software learning application to examine the mathematical understanding abilities and responses of students taking Geometry Transformation course. The subjects of this study were 24 students of mathematics education study program in Universitas Langlangbuana. The research instrument consisted of a mathematical comprehension ability test and a student response questionnaire. Based on data analysis using SPSS 2.0.0 and Microsoft Excel 2013, the study found that achievement and improvement in mathematical understanding skills and responses of students who received learning with GeoGebra software were better than achievement and improvement in student's ability who obtain conventional approach for the high, middle and low categories. The study also found a moderate relationship between mathematical understanding ability and student response. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Students

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Development of Color Detection Based on Camera Infrared Filter with Python Image Processing

Development of Color Detection Based on Camera Infrared Filt...

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Student Conference on Research and Development (SCOReD)

作者： Joshu Leonardy Nawal Zuhdaniel Aflah Mohd Rashidi Bin Salim Mohd Haniff Bin Ibrahim Hadi Bin Manap Wildan Panji Tresna Faculty of Electrical Engineering Universiti Teknologi Malaysia JohorBahru Malaysia Military Physics Study Program The Republic of Indonesia Defense University Bogor Indonesia Faculty of Electrical & Electronic Engineering Technology University Malaysia Pahang Al Sultan Abdullah Pekan Malaysia Research Center for Photonics National Research and Inovation Agency Indonesia South Tangerang Indonesia

ISBN: (数字)9798331510077

ISBN: (纸本)9798331510084

This research explores the use of a modified infrared (IR) camera equipped with a high-pass filter to distinguish between natural objects (vegetation) and artificial objects (synthetic military uniforms) in an environment where vegetation makes objects difficult to detect. In military operations, especially guerrilla warfare in tropical forests, detecting enemies camouflaged in vegetation makes it difficult to distinguish targeted objects. Visible light cameras usually struggle to distinguish between synthetic and natural colors. This methodology involves the use of Python programming and various libraries, such as Computer Vision (CV), to process images captured by modified cameras. A graphical user interface (GUI) was developed to analyze color values, focusing on the red, green, and blue spectra. The results show that the modified IR camera can more effectively separate synthetic and natural object color peaks compared to a standard visible light camera, offering potential applications in military reconnaissance and sniper operations. This research demonstrates how image processing can improve object detection in complex environments.

关键词： Image color analysis Vegetation mapping Object detection Reconnaissance programming Cameras Standards Research and development Graphical user interfaces Python

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Alginate-based bioink for organoid 3D bioprinting: A review

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Bioprinting 2022年 28卷

作者： Leonardo, Michael Prajatelistia, Ekavianty Judawisastra, Hermawan Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Indonesia Materials Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Indonesia

As a 3D cell culture, organoids have been researched thoroughly to model the human biology system in advancing disease treatment and drug development. A novel way to create an organoid is using bioink, consisting of polymeric materials and living cells, to fabricate a hydrogel scaffold through the 3D bioprinting method. Alginate has the potential to be developed as a bioink due to its good biocompatibility, low toxicity, and ease of processing method. However, studies are still required to obtain an optimum alginate-based bioink. Alginate is insufficient in terms of the cell-binding site;thus, mixing it with supplementary gelatin material can be employed to optimize further the printability, mechanical properties, and biocompatibility of alginate-based bioink. The addition of gelatin material, in addition to increasing the binding site, also makes the process of making bioink easier due to the thermoresponsive nature of gelatin. The alginate-based bioink can be further optimized depending on gelatin concentration to produce appropriate density and rheological value of bioink. The addition of gelatin into alginate-based bioink will also significantly affect the printability of bioink and the mechanical properties of resulted hydrogel scaffold, which need to be considered appropriately. The alginate-based bioink also showed good biocompatibility regarding cell viability and biological performance. This paper focuses on the relationship between the structure and properties of alginate-based bioink, the 3D bioprinting processing parameters, and the implementation of resulted hydrogel scaffold and organoid. © 2022 Elsevier B.V.

关键词： 3D bioprinting Alginate Bioink Gelatin Hydrogel scaffold

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