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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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Different Particle Sizes of Momordica Charantia Leaf Powder Modify the Rheological and Textural Properties of Corn Starch-Based 3d Food Printing Ink

SSRN

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SSRN 2023年

作者： Fan, Meiqi Choi, Young-Jin Wedamulla, Nishala Erandi Oh, Mirae Bae, Sung Mun Yang, Daeun Kang, Hyo Tang, Yujiao Moon, Sang-Ho Kim, Eun-Kyung Division of Food Bioscience College of Biomedical and Health Sciences Konkuk University Chungju27478 Korea Republic of Department of Food Science and Nutrition College of Health Science Dong-A University Busan49315 Korea Republic of Department of Health Sciences The Graduate School of Dong-A University Busan49315 Korea Republic of Department of Food Science and Technology Faculty of Animal Science and Export Agriculture Uva Wellassa University Badulla90000 Sri Lanka Grassland and Forages Division National Institute of Animal Science Rural Development Administration Cheonan31000 Korea Republic of Gyeongnam Agricultural Research and Extension Services Jinju52733 Korea Republic of BK-21 Four Graduate Program Department of Chemical Engineering Dong-A University Busan49315 Korea Republic of School of Bio-Science and Food Engineering Changchun University of Science and Technology Changchun130600 China Center for Food and Bio Innovation Dong-A University Busan49315 Korea Republic of Nutritional Education Major Graduate School of Education Dong-A University Busan49315 Korea Republic of Nutrinomics Lab. Co. Ltd. Busan49315 Korea Republic of

The study determined the effect of incorporating Momordica charantia leaf powder (MCLP) into corn-starch 3D food-printing ink as a functional ingredient. The effects of the particle size (75, 131, and 200 μm) and quantity of MCLP on 3D printing performance, structural, textural, and rheological properties of corn starch gel were evaluated with different concentrations (5, 10, and 15% (w/w)) of corn starch. The viscoelastic properties of food inks were determined considering their behavior during extrusion and self-recovery after printing. Scanning electron microscope was used to characterize the microstructure. Based on the results, a high starch content (15%) with 5% MCLP was more favorable for 3D food printing. In addition, 3D printing performance, textural and rheological properties of formulated ink was mainly governed by the particle size of MCLP. The food ink with a 5% mass fraction of 200 μm MCLP had the highest printing precision and the best masticatory properties. © 2023, The Authors. All rights reserved.

关键词： Particle size

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Deactivation/Regeneration Studies in Structured Monolithic Ni-Based Catalysts Applied in Dry Reforming of Methane

SSRN

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SSRN 2022年

作者： de Araújo, Ítalo R.S. Ribeiro, André T.S. Garcia, Ramón R.P. Sales, Deivson C.S. Almeida, Luciano C. Department of Chemical Engineering Technology and Geoscience Center Federal University of Pernambuco PE Recife50740-521 Brazil Polytechnic School of Pernambuco University of Pernambuco Rua Benfica 455 Madalena PE Recife50720-001 Brazil Materials Science and Engineering Graduate Program Federal University of Piauí PI Teresina Brazil Federal Rural University of Pernambuco Academic Unit of Cabo de Santo Agostinho PE Cabo de Santo Agostinho Brazil

In this work, the Ni/γ-Al2O3 (Ni/Al) and Ni/LA2O3-γ-Al2O3 (Ni/La-Al) catalysts were synthesized by the all-in-one method and used in the Dry Reforming of Methane (DRM). The catalysts were characterized and a smaller Ni crystallite size for the La-promoted catalyst was observed. The effects of the feed ratio (CH4:CO2), the use of La as a promoter of the catalyst support, and the use of the structured system in DRM reaction were investigated. Raman spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) were applied to investigate the catalytic deactivation effects. The deactivation of the structured catalysts was also evaluated by applying different weight hourly space velocities (WHSV): 20, 30, and 40 L gcat-1 h-1. Besides that, the regeneration of the catalysts was developed through the comparison of the treatment with CO2 and H2 atmospheres. The catalytic study of the powder samples showed that the lower the CH4:CO2 ratio the higher reactants conversion for both catalysts. It was also noted that the CH4:CO2 feed ratio of 4 provided a conversion 10 % higher for the Ni/La-Al catalyst in comparison with the Ni/Al catalyst. The analogy between the powder and structured systems implied greater conversion for the structured system. Furthermore, the greater and the lower deactivation of the structured systems were identified for the WHSV values of 40 and 20 L gcat-1 h-1, respectively. Finally, the regeneration treatment with CO2 showed to be more efficient than the treatment with H2 © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

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Development of a Selective Wet-chemical Etchant for 3D Structuring of Silicon via Nonlinear Laser Lithography

arXiv

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arXiv 2023年

作者： Borra, Mona Zolfaghari Radfar, Behrad Nasser, Hisham Çolakoğlu, Tahir Tokel, Onur Turnalı, Ahmet Demirtaş, Merve Ustunel, Hande Toffoli, Daniele Ömer İlday, F. Turan, Raşit Pavlov, Ihor Bek, Alpan ODTÜ-GÜNAM Middle East Technical University Ankara06800 Turkey Ankara06800 Turkey Department of Electronics and Nanoengineering Aalto University Tietotie 3 EspooFI-02150 Finland Department of Physics Engineering Ankara University Ankara06100 Turkey Department of Physics Bilkent University Ankara06800 Turkey UNAM National Nanotechnology Research Center Institute of Materials Science and Nanotechnology Bilkent University Ankara06800 Turkey Department of Electrical and Electronics Engineering Bilkent University Ankara06800 Turkey Department of Electrical and Computer Engineering Boston University 8 Saint Mary’s Street BostonMA02215 United States Ankara06800 Turkey Network Technologies Department TUBITAK ULAKBIM Ankara06800 Turkey Department of Chemical and Pharmaceutical Sciences Trieste University Trieste Italy IOM-CNR Istituto Officina dei Materiali Trieste34149 Italy Micro and Nanotechnology Graduate Program of Natural and Applied Sciences Middle East Technical Turkey

Recently-demonstrated high-quality three-dimensional (3D) subsurface laser processing inside crystalline silicon (c-Si) wafers opens a door to a wide range of novel applications in multidisciplinary research areas. Using this technique, a novel maskless micro-pillars with precise control on the surface reflection and coverage are successfully fabricated by etching the laser processed region of c-Si wafer. To achieve this, a particular selective wet chemical etching is developed to follow subsurface laser processing of c-Si to reveal the desired 3D structures with smooth surfaces. Here, we report the development of a novel chromium-free chemical etching recipe based on copper nitrate, which yields substantially smooth surfaces at high etch rate and selectivity on the both laser-processed Si surface and subsurface, i.e., without significant etching of the unmodified Si. Our results show that the etch rate and surface morphology are interrelated and strongly influenced by the composition of the adopted etching solution. After an extensive compositional study performed at room temperature, we identify an etchant with a selectivity of over 1600 times for laser-modified Si with respect to unmodified Si. We also support our findings using density functional theory calculations of HF and Cu adsorption energies, indicating significant diversity on the c-Si and laser-modified surfaces. Copyright © 2023, The Authors. All rights reserved.

关键词： Morphology

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Toughening mechanisms of the elytra of the diabolical ironclad beetle (vol 586, pg 543, 2020)

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NATURE 2021年第7844期590卷 E21-E21页

作者： Rivera, Jesus Hosseini, Maryam Sadat Restrepo, David Murata, Satoshi Vasile, Drago Parkinson, Dilworth Y. Barnard, Harold S. Arakaki, Atsushi Zavattieri, Pablo Kisailus, David Materials Science and Engineering Program University of California Riverside CA USA Department of Chemical and Environmental Engineering University of California Riverside CA USA Department of Materials Science and Engineering University of California Irvine CA USA Lyles School of Civil Engineering Purdue University West Lafayette IN USA Department of Mechanical Engineering The University of Texas at San Antonio San Antonio TX USA Institute of Global Innovation Research Tokyo University of Agriculture and Technology Koganei Tokyo Japan Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA USA

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BPS2025 - Improving the force field for lipid interactions with calcium and beryllium

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Biophysical Journal 2025年第3期124卷 153a-153a页

作者： Jessica Bodosa Sergei I. Sukharev Jeffery B. Klauda Biophysics Program University of Maryland College Park College Park MD USA Department of Biology and Institute for Physical Science and Technology University of Maryland College Park MD USA Department of Chemical and Biomolecular Engineering University of Maryland College Park MD USA

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Insights into the removal of microplastics from water using biochar in the era of COVID-19: A mini review

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Case Studies in chemical and Environmental engineering 2021年 4卷

作者： Abuwatfa, Waad H. Al-Muqbel, Dana Al-Othman, Amani Halalsheh, Neda Tawalbeh, Muhammad Department of Chemical Engineering American University of Sharjah Sharjah United Arab Emirates Materials Science and Engineering Ph.D. Program American University of Sharjah Sharjah United Arab Emirates Department of Civil Engineering The Hashemite University PO. Box 330127 Zarqa Jordan Sustainable and Renewable Energy Engineering University of Sharjah Sharjah United Arab Emirates

Microplastics pollution is a modern-day prevalent challenge that poses serious threats to the general wellbeing and sustainability of the planet. Due to their innately persistent nature, extreme durability, and high stability, they exhibit long residence time and could be transferred through the ecological chains. Current days have witnessed an increase in the accumulation of microplastics waste and debris. This is due to the protective measures imposed by governments and the World Health Organization (WHO) as part of the containment and mitigation efforts of the COVID-19 pandemic. Therefore, the development of versatile, robust, flexible, and efficient removal systems has become a necessity in order to control microplastics pollution. Herein, we review the repercussions of the pandemic on the state of microplastics contamination, sources and identification methods of microplastics in water, their toxicity and risks on the environment, as well as their degradation and conventional removal methods. This review focuses on adsorption and the use of biochar as one of the emerging adsorbents for the removal of microplastics. The efficiency of adsorption using biochar, mechanisms, and applications are discussed. The review addresses the increased rates of microplastics occurrence especially during the era of COVID-19, which requires more efficient and lower cost removal methods. The major conclusions drawn from this review include emphasizing the significant potential of adsorption processes in the removal of microplastics. Biochar is present among the available and most efficient biomass adsorbents especially when combined with other materials. Composite biochar materials play an important role in enhancing the removal and immobility of microplastics. However, more research is required to investigate this at a larger scale, improve efficiency and immobilization techniques. © 2021 The Authors

关键词： Adsorption Biochar COVID-19 Microplastics pollution Removal efficiency Water treatment

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Microspheres for 3D bioprinting: a review of fabrication methods and applications

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Frontiers in bioengineering and biotechnology 2025年 13卷 1551199页

作者： Dmitri Karaman Kira Williams Jolene Phelps Fynn La Boucan Gretchen Lewandowski Kerrin O'Grady Bosco Yu Stephanie M Willerth Department of Mechanical Engineering University of Victoria Victoria BC Canada. Division of Medical Sciences University of Victoria Victoria BC Canada. Axolotl Biosciences Victoria BC Canada. Biomedical Engineering Program Department of Mechanical Engineering University of Victoria Victoria BC Canada. Biology Program Department of Science University of Victoria Victoria BC Canada. Department of Biomedical and Chemical Engineering Syracuse University Syracuse NY United States. BioInspired Syracuse Institute for Material and Living Systems Syracuse University Syracuse NY United States. School of Biomedical Engineering Faculty of Applied Science and Faculty of Medicine University of British Columbia Vancouver BC Canada.

Bioprinting incorporates printable biomaterials into 3D printing to create intricate tissues that maintain a defined 3D structure while supporting the survival and function of relevant cell types. A major challenge in 3D bioprinting is tuning material properties to ensure compatibility with different types of cells, while accurately mimicking the physiological microenvironment. Developing novel bioinks tailored to specific applications can help address this challenge by combining various materials and additives to tune the bioink formulation. Microspheres - small spherical particles - can incorporate drugs or growth factors to enable their controlled release, encapsulate cells to provide protection during printing, and provide structural reinforcement to tune mechanical properties and enable complex architectures. The particles range in size from 1 to 1000 μm and can be tuned to meet desired functions by optimizing their mode of production and the materials used for fabrication. This review presents an overview of microsphere production methods and considerations for optimizing the production process. It then summarizes how microspheres have been used to date in bioprinting applications. Finally, the existing challenges associated with the creation and use of microspheres are discussed along with avenues for future research.

关键词： biomaterials bioprinting drug encapsulation electrospray emulsification microfluidics microspheres

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Polyzwitterionic Hydrogels for Highly Efficient High Salinity Solar Desalination

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Angewandte Chemie 2022年第36期134卷

作者： Chuxin Lei Weixin Guan Youhong Guo Wen Shi Yuyang Wang Prof. Keith P. Johnston Prof. Guihua Yu Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA McKetta Department of Chemical Engineering The University of Texas at Austin Austin TX 78712 USA

Interfacial solar vapor generation (SVG) is regarded as a promising and sustainable strategy for clean water production. While many materials have demonstrated excellent evaporation rates under one sun, it remains challenging to design solar evaporators without compromising SVG performance in high-salinity brines (≥10 wt %). Herein, polyzwitterionic hydrogels (PZHs) are proposed as a novel platform for high-salinity solar desalination. Taking advantage of the unique anti-polyelectrolyte effects, PZHs can trap salt ions from the brine water to form a more hydrated polymer network, leading to enhanced SVG performance. PZHs exhibit an exceptional solar evaporation rate of 4.14 kg m −2 h −1 in 10 wt % brine, which is ≈20 % higher than that in pure water. It is anticipated that salt-responsive PZHs may provide insights for the design of next-generation solar desalination systems.

关键词： Anti-Polyelectrolyte Effects Hydration Polyzwitterionic Hydrogel Solar Desalination Solar Vapor Generation

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Efficient sampling of polycyclic aromatic compounds for free energy predictions through active learning

Energy and AI

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Energy and AI 2025年

作者： Mohammed I. Radaideh Matt Raymond Paolo Elvati Jacob C. Saldinger Majdi I. Radaideh Angela Violi Department of Mechanical Engineering University of Michigan Ann Arbor MI 48109-2125 United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2125 United States Department of Chemical Engineering University of Michigan Ann Arbor MI 48109-2125 United States Department of Nuclear Engineering and Radiological Sciences University of Michigan Ann Arbor MI 48109-1500 United States Biophysics Program University of Michigan Ann Arbor MI 48109-1500 United States

The physical growth of Polycyclic Aromatic Compounds (PACs) to soot particles plays a significant role in understanding the chemistry of soot formation. Insights into the process can be gained from PACs’ free energy of dimerization landscape. However, because the infeasibly large space of possible PAC dimers cannot be exhaustively simulated, researchers must train machine learning models on a subset of data to impute the rest. To this end, we propose and assess an active learning approach to discovering the optimal PACs for training a machine learning model to predict PACs’ association and dissociation free energies. The comparison between active learning and random sampling showed that active learning has faster loss convergence, requiring fewer training samples to reach the same level of accuracy. The trained model accurately modeled unseen PACs and exhibited robustness against changes in the sampling space used to train the model. More broadly, this work shows how active learning can optimize the design and improve the understanding of more expensive models in specific domains.

关键词： Free energy Polycyclic aromatic compounds (PACs) Active learning Gaussian process regression Representer theorem SHAP

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