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Date fruit melanin is primarily based on (-)-epicatechin proanthocyanidin oligomers( vol 14 , 4863 , 2024)

SCIENTIFIC REPORTS 2024年第1期14卷 1-12页

作者： Alam, Muneeba Zubair Okonkwo, Clinton Emeka Cachaneski-Lopes, Joao P. Graeff, Carlos F. O. Batagin-Neto, Augusto Tariq, Saeed Varghese, Sabu O'Connor, Matthew J. Albadri, Abuzar E. Webber, J. Beau W. Tarique, Mohammed Ayyash, Mutamed Kamal-Eldin, Afaf Department of Food Science College of Agriculture and Veterinary Medicine United Arab Emirates University P.O. Box: 15551 Al-Ain United Arab Emirates National Water and Energy Center (NWEC) United Arab Emirates University P.O. Box: 15551 Al-Ain United Arab Emirates Postgraduate Program in Materials Science and Technology (POSMAT) São Paulo State University (UNESP) Bauru SP Brazil Department of Physics School of Sciences São Paulo State University (UNESP) Bauru SP Brazil Institute of Sciences and Engineering São Paulo State University (UNESP) Itapeva SP Brazil Department of Anatomy College of Medicine and Health Sciences United Arab Emirates University Al Ain United Arab Emirates Core Technology Platforms New York University Abu Dhabi 129188 Abu Dhabi United Arab Emirates Department of Chemistry College of Science Qassim University 51452 Buraidah Saudi Arabia Lab-Tools Ltd. Marlowe Innovation Centre Marlowe Way Ramsgate CT12 6FA UK

Plant-based melanin seems to be abundant, but it did not receive scientific attention despite its importance in plant biology and medicinal applications, e.g. photoprotection, radical scavenging, antimicrobial properties, etc. Date fruit melanin (DM) has complex, graphene-like, polymeric structure that needs characterization to understand its molecular properties and potential applications. This study provides the first investigation of the possible molecular composition of DM. High performance size-exclusion chromatography (HPSEC) suggested that DM contains oligomeric structures (569–3236 Da) and transmission electron microscopy (TEM) showed agglomeration of these structures in granules of low total porosity (10–1000 Å). Nuclear magnetic resonance (NMR) spectroscopy provided evidence for the presence of oligomeric proanthocyanidins and electron paramagnetic resonance (EPR) spectroscopy revealed a g-factor in the range 2.0034–2.005. Density functional theory (DFT) calculations suggested that the EPR signals can be associated with oligomeric proanthocyanidin structures having 4 and above molecular units of (−)-epicatechin. The discovery of edible melanin in date fruits and its characterization are expected to open a new area of research on its significance to nutritional and sensory characteristics of plant-based foods.

关键词： Phoenix dactylifera L. (−)-Epicatechin Date fruit Melanin Proanthocyanidins

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Alkali-Activated Eco-Friendly Mixtures with Low-Processed Sugarcane Bagasse Ash—Physical, Mechanical, and Microstructural Properties

SSRN

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SSRN 2022年

作者： Lima, Victor Estolano de Estolano, Amanda Marques Lopes Almeida, Yeda Medeiros Bastos de Henrique, Mariana Alves Araújo, Fernanda Wanderley Corrêa de Melo Neto, Antonio Acacio de Federal University of Pernambuco Department of Civil and Environmental Engineering LabTag Av. da Arquitetura Recife Brazil Federal University of Pernambuco National Institute of Welding Technology and Coating of Materials INTM Rua da Inovação Recife Brazil Federal University of Pernambuco Institute for Petroleum and Energy Research LITPEG Petrochemical Laboratory Av. da Arquitetura Recife Brazil Federal University of Pernambuco Postgraduate Program in Materials Science Av. Jorn. Aníbal Fernandes Recife Brazil Federal Rural University of Pernambuco Department of Rural Technology Rua Cento e Sessenta e Três Cabo de Santo Agostinho Brazil

In this study, sugarcane bagasse ash was used to evaluate the physical, mechanical, and microstructural properties of eco-friendly alkali-activated mixtures with blast furnace slag. Net sodium silicate and solid metasilicate were used as activators to produce conventional and one-part alkali-activated mixtures, respectively. Two types of sugarcane bagasse ash were analyzed: raw (as-received) and calcined. The low number of proposed processes reduces the economic aggregate cost of recycled ash. Further, the blast furnace slag replacement ratios of raw and calcined sugarcane bagasse ash were 10%, 30%, 50%, and 70%. Mortars were prepared for the compressive and flexural strength tests, water absorption, and dry density. Alternatively, X-ray diffraction, thermogravimetry, infrared spectroscopy, and scanning electron microscopy were used to assess the chemical, mineralogical, and microstructural properties of the prepared pastes. In addition, the fresh test was performed using the flow table test, wherein the spread diameter decreased as the SBA content increased, primarily on the raw ash owing to its high organic material content. Moreover, compressive strength results showed that the compressive strength increased after 3 days for mixtures with 10% and 30% SBA. However, at 28 days, there was a decrease with an increase in the SBA content. Similar behavior was observed in the flexural strength and water absorption tests. Tests on pastes verified the probable presence of alternative phases besides C-(A)-S-H, such as pectolite, brucite, hydrotalcite, and zeolites. In addition, through the combination of scanning electron microscopy and energy dispersive spectroscopy techniques, the presence of preserved cellular structure was observed in the alkali-activated matrix, and Ca/Si and Si/Al ratios were calculated. It was concluded that the low reactivity of raw sugarcane bagasse ash and the low reactivity of both ashes significantly decreased mechanical performance. Furthermor

关键词： Slags

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Correction to: SARS-CoV-2 removal with a polyurethane foam composite

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Environmental science and pollution research international 2023年第8期30卷 22033页

作者： Guilherme Pereira Schoeler Thays França Afonso Carolina Faccio Demarco Victor Dos Santos Barboza Tito Roberto Sant'anna Cadaval Andrei Valerão Igansi Marcos Alexandre Gelesky Janice Luehring Giongo Rodrigo de Almeida Vaucher Rafael de Avila Delucis Robson Andreazza Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. Graduate Program in Biochemistry and Bioprospecting Research Laboratory in Biochemical and Molecular Biology of Microorganisms (LaPeBBiOM) Federal University of Pelotas RS Av. Eliseu Maciel Campus Universitário s/n Capão Do Leão CEP 96160-000 Brazil. School of Chemistry and Food Federal University of Rio Grande Av. Itália Km 8 s/n Rio Grande RS CEP 96203-000 Brazil. Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. robsonandreazza@yahoo.com.br. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. robsonandreazza@yahoo.com.br.

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Enhancing Cybersecurity in the Judiciary: Integrating Additional Controls into the CIS Framework

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Computers & Security 2025年

作者： RENATO SOLIMAR ALVES JADY PAMELLA BARBACENA DA SILVA Luiz Antonio Ribeiro Junior RAFAEL RABELO NUNES Professional Postgraduate Program in Electrical Engineering (PPEE) Department of Electrical Engineering College of Technology University of Brasília (UNB) Brasília 70910-900 Federal District Brazil Computational Materials Laboratory Computational Materials Science Laboratory (LCCMat) Institute of Physics University of Brasilia (UNB) Brasília 70910-900 Federal District Brazil Faculty of Economics Administration Accounting and Public Policy Management Department of Administration University of Brasília (UNB) Brasília 70910-900 Federal District Brazil UniAtenas University Center Paracatu 38602-018 Minas Gerais Brazil

The Judiciary faces considerable challenges protecting its critical operations from cyber threats in an increasingly digital and vulnerable landscape. This article explores the need to enhance information security practices beyond basic security controls to address operational and technological risks targeting the Judiciary. Intending to propose an expansion of the security controls suggested by the CIS Controls framework, this article focuses on critical areas such as information security management, personnel management, and technological requirements specific to the judicial context. Through qualitative analysis and consultations with experts in the field, preventive and corrective measures were identified, encompassing effective communication practices, mental health programs, and a strong culture of integrity complemented by advanced cybersecurity technologies. The results highlight the need for additional, comprehensive controls ranging from physical security to digital protection, promoting an integrated approach to risk management. The contributions of this article extend to establishing a strengthened foundation for security controls, creating a more effective defense mechanism against emerging threats, and ensuring the sustainability and efficiency of court operations. This article contributes to the evolution of security strategies in the Judiciary, with direct practical implications for risk mitigation and the protection of information assets. The work contributes to the debate on information security in the Judiciary and how to adapt and expand the application of the CIS framework.

关键词： Critical Security Controls Cybersecurity Measures Data Protection Information Security Management Judicial System Security Operational Risk Management Threat Mitigation Strategies Tailoring

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Coconut waste to green nanomaterial: Large scale synthesis of N-doped graphene nano sheets

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Nano-Structures and Nano-Objects 2023年 36卷

作者： Siburian, Rikson Tang, Liang Wei Alias, Yatimah Tok, Alfred Iing Yoong Goei, Ronn Simanjuntak, Crystina Tarigan, Kerista Paiman, Suriati Goh, Boon Tong Anshori, Isa Kurniawan, Cepi Postgraduate Program Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Carbon and Frankincense Research Center Universitas Sumatera Utara Medan 20155 Indonesia Department of Chemistry Faculty of Science Universiti Malaya Kuala Lumpur 50603 Malaysia University Malaya Centre for Ionic Liquids (UMCiL) Universiti Malaya Kuala Lumpur 50603 Malaysia School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Department of Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia Physics Department Faculty of Science Universiti Putra Malaysia Selangor (Serdang) Seri Kembangan 43400 Malaysia Low Dimensional Materials Research Centre Department of Physics Faculty of Science University of Malaya Kuala Lumpur 50603 Malaysia Biomedical Engineering Department School of Electrical Engineering and Informatics Bandung Institute of Technology Bandung 40132 Indonesia Research Center of Nanoscience and Nanotechnology Bandung Institute of Technology Bandung 40132 Indonesia Chemistry Department Faculty of Mathematics and Natural Sciences Universitas Negeri Semarang Semarang 50229 Indonesia Functional Material Research Center Universitas Negeri Semarang Semarang 50229 Indonesia

In this paper, a breakthrough was achieved in large-scale production of N-doped Graphene Nano Sheets (N-GNS) using coconut fruits. The main objectives were to produce N-GNS on a large scale and assess its electrical conductivity. The process involved two key steps: first, producing GNS from coconut fruits through pyrolysis, and then generating N-GNS by doping with nitrogen using ammonia solution at room temperature. Various analytical techniques were used to characterize the produced N-GNS, including X-ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, and electrochemical cyclic voltammetry and electrochemical impedance spectroscopy. The XRD data indicated that the C (002) peak of N-GNS shifted to a higher 2θ value (2θ = 24.72°) compared to GNS (2θ = 23.86°), suggesting an incorporation of nitrogen into carbon structure in N-GNS. This was further supported by XPS data, which identified N-pyridine (BE = 402.0 eV) and C-N (BE = 286.8 eV) in N-GNS. TEM images showed that N-GNS had a flat surface, and the distance between graphene layers slightly expanded (0.36 nm) compared to graphene layers (0.34 nm). SEM images and EDX data validated the morphology, resembling honeycomb lattices, with a significant content of N atoms. Raman data successfully identified the D-band and G-band in N-GNS, further validating its production. Most importantly, N-GNS exhibited electrical conductivity, making it a promising candidate for conductive and supporting materials in various applications. The significance of this research extends beyond N-GNS production, opening up new avenues for the sustainable synthesis of valuable nanomaterials from coconut fruit waste, contributing to both graphene technology and environmental conservation. © 2023 Elsevier B.V.

关键词： C-sp2 Electrical conductivity Graphene nano sheets N-graphene nano sheets N-pyridine XPS

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Flexural properties of recycled ABS/recycled carbon fiber fabric composites

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AIP Conference Proceedings 2023年第1期2884卷

作者： Meire Noriko Hosokawa Jane Maria Faulstich de Paiva Postgraduate Program in Materials Science Federal University of São Carlos João Leme dos Santos Highway (SP 264) 110 18052-780 Sorocaba SP Brazil Department of Production Engineering Federal University of São Carlos João Leme dos Santos Highway (SP 264) 110 18052-780 Sorocaba SP Brazil

The reuse of solid waste is a practice that could reduce the disposal of high-value materials in the environment and also promote the circular economy. The recycling of waste electrical and electronic equipment and carbon-fiber-reinforced polymers wastes can be an alternative to recover materials with good properties (acrylonitrile butadiene styrene and carbon fibers, respectively) and insert them into a new production cycle. In this context, the objective of this study was to develop a composite using a recycled polymer as a matrix (acrylonitrile butadiene styrene) reinforced with recycled carbon fiber fabric and; to evaluate the flexural properties of the materials. The composites were molded by the hot compression method and the bending tests followed the ASTM D790-17 standard. The results showed that the addition of the carbon fiber fabric promoted an increase of up to 13% in the flexural strength of the composite containing a layer of recycled carbon fiber fabric. Thus, remanufacturing can be an alternative to reusing recycled materials that have good mechanical properties and high added value to be used in other applications.

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Reverse electrodialysis membrane for harvesting salinity gradient energy with and without spacer under natural wetland water

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AIP Conference Proceedings 2023年第1期2932卷

作者： Muthia Elma Dwi Resa Lamandau Siti Fatimah Satria Anugerah Suhendra Aulia Rahma Department of Chemical Engineering Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia Materials and Membranes Research Group (M2ReG) Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia Environmental Science Doctoral and Postgraduate Program Lambung Mangkurat University Jl. Brigjen H. Hasan Basry Banjarmasin 70123 Indonesia

Salinity gradient energy (SGE) allows two solutions with different salt concentration to mixing and directly into electrical energy by reverse electrodialysis (RED) membrane. High power outputs are forecasted theoretically, but in real practice is still relatively low RED power efficiency. In this work, the spacer shadow effects on both membrane and solution compartment resistances are investigated by employing nylon spacer and without spacer. In addition, this experiment also proposes the power density performance of RED membrane under natural wetland water as low saline solution and variation of high saline solution i.e., artificial brackish water (0.3 wt% NaCl) and artificial seawater (3.5 wt% NaCl). The results indicate that the spacer shadow effect on RED membrane has a correlation with energy output generated. The used of spacer led to an increase in stack resistance and decrease in power density compared to without nylon spacer. This result increases the impact of RED renewable power source and brings it closer to practical implementation, especially for the potential natural wetland water as low saline solution. The power output was computed, obtaining a maximum power density of 0.19 W/m2 with variations without spacers, and 0.14 W/m2 with spacers. Results show that of the cell components directly influences the physicochemical principles governing the RED process and is closely related to the cell output parameters. In turn, it is possible to increase the performance of a RED cell by optimizing operation without spacers to avoid the shadow effect.

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CaO/Al2O3based fibers produced by solution blow spinning as a potential bifunctional catalyst for sorption-enhanced steam methane reforming

CaO/Al2O3based fibers produced by solution blow spinning as ...

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International Renewable Energy Congress

作者： Thamyscira H. S. Silva Moisés R. Cesário Cédric Gennequin Edmond Abi-Aad Vinícius D. Silva Daniel A. Macedo Unité de Chimie Environnementale et Interactions sur le Vivant - UCEIV Université du Littoral Côté d'Opale - ULCO Dunkerque France Materials Science and Engineering Postgraduate Program - PPCEM Universidade Federal da Paraíba - UFPB João Pessoa Brazil

ISBN: (数字)9781728155722

ISBN: (纸本)9781728155739

Changes for cleaner energy production are strongly demanded by society. In this perspective, researchers have been developing material that capture CO 2 and increase the production of H 2 . In this work, we highlight the potential of producing porous calcium aluminate fibers for application in Sorption-Enhanced Steam Methane Reforming (SESMR) through a relatively simple technique known as Solution Blow Spinning (SBS). The fibers produced have a greater surface area and a comparable conversion rate of methane than materials produced by conventional synthesis techniques.

关键词： Catalysis Methane Calcium Spinning Optical fiber networks Surface morphology Nickel

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Rapid and highly efficient adsorption of dye and heavy metal on low-cost adsorbent derived from human feces and Chlorella vulgaris

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Environmental Nanotechnology, Monitoring and Management 2023年 20卷

作者： Wibowo, Yudha Gusti Lululangin, Bonifasius Revo Gifta Safitri, Hana Rohman, Arif Sudibyo Priyanto, Sugeng Syarifuddin, Hutwan Tatik Maryani, Anis Tawfiqurahman Yuliansyah, Ahmad Kurniawan, Ade Tsabitah, Natasya Taher, Tarmizi Petrus, Himawan Tri Bayu Murti Sustainable Mining and Environmental Research Group Department of Mining Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Departement of Chemical Engineering Universitas Gadjah Mada Jl Grafika No. 2 Sleman Bulaksumur 55284 Indonesia Department of Geomatic Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia Research Center for Mining Technology - National Research and Innovation Agency Jl. Ir. Sutami KM. 15 Tanjung Bintang South Lampung Lampung 35361 Indonesia Department of Mechanical Engineering Universitas Negeri Jakarta Jakarta Indonesia Postgraduate Program of Environmental Science Universitas Jambi Jambi Indonesia Department of Environmental Engineering Institut Teknologi Sumatera Jl. Terusan Ryacudu Way Huwi Kec. Jati Agung Kabupaten Lampung Selatan Lampung 35365 Indonesia

Wastewater management is a pressing global concern, demanding effective, efficient, cost-friendly, and user-friendly solutions. Among the various methods available, adsorption has emerged as a practical choice. The primary culprits responsible for many human diseases in wastewater are heavy metals and dyes. In this study, we successfully harnessed low-cost biochar derived from human feces and Chlorella vulgaris to significantly accelerate and enhance the removal of heavy metals and dyes. Human feces and Chlorella vulgaris were transformed into biochar under three distinct conditions: biochar, Chlorella vulgaris, and a combination of both. Notably, these materials exhibited exceptional capabilities, removing heavy metals and dyes by as much as 98 % within a mere 10-minute timeframe. This material have adsorption capacity up to 56.8 mg/g for Mn and 20 mg/g for Methylene Blue. To comprehensively evaluate the performance of the optimal samples, we conducted a battery of tests, including performance assessments, sorption capacity measurements, exploration of five isotherm models, and kinetic analyses. Furthermore, we elucidated the sorption mechanisms through thorough characterizations of the materials using SEM, XRD, FTIR, and XRF, providing holistic insights into their properties. This study extends its relevance beyond the laboratory, offering valuable insights into future prospects and policy recommendations. In doing so, it serves as a pivotal resource for researchers and governmental bodies alike, facilitating progress in wastewater treatment and environmental policy development. © 2023 Elsevier B.V.

关键词： Adsorption Biochar Dye sorption Heavy metal sorption Nanocomposite material Wastewater

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Morfology, Microstrucuture and Electrocatalytical Properties of Sol-Gel Spin Coated Bi05na05ba(Tio3)2 Thin Films

SSRN

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SSRN 2022年

作者： Batista, Carlos Yago Pereira Romaguera–Barcelay, Yonny Matos, Robert Saraiva Pedraça, Aline dos Santos Amâncio, Moisés do Amaral Kourouma, Ansoumane Ruiz, Yurimiler Leyet Cotta, Eduardo Adriano Brito, Walter Ricardo Gandarilla, Ariamna María Dip do Nascimento, Marcus Valério Botelho Nobre, Francisco Xavier Ferreira, Nilson S. Salerno, Marco da Fonseca Filho, Henrique Duarte Technological Materials Processing Laboratory Federal University of Amazonas Amazonas Manaus69067-005 Brazil BioMark UC Department of Chemical Engineering Faculty of Sciences and Technology University of Coimbra Coimbra3030-790 Portugal Department of Physics Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Physics Federal University of Amapá Amapá Macapá68902-280 Brazil Electrical Engineering postgraduate program Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Chemistry Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Pharmaceutical Sciences Gamal Abdel Nasser University of Conakry Guinea-bissau Federal Institute of Amazonas—Campus Coari Coari69460-000 Brazil Department of Physics Federal University of Sergipe São Cristovão Sergipe49100-000 Brazil Institute for Materials Science Max Bergmann Center of Biomaterials Technische Universität Dresden Dresden01069 Germany Laboratory of Nanomaterials Synthesis and Nanoscopy Department of Physics Federal University of Amazonas Amazonas Manaus69067-005 Brazil

Herein, we report, for the first time, the reduction reaction kinetics of ciprofloxacin organic molecules based on structural and micromorphological conditions of an electrocatalytic system of Bi05Na05Ba(TiO3)2 (BNT-BT) thin films. XRD analysis showed the coexistence of rhombohedral and tetragonal structures for the BNT-BT thin films annealed at 600, 650, and 700°C, showing that the first one had a greater number of surface defects, which was confirmed by Raman Spectroscopy. Analysis of the 3D micromorphological evaluation showed that an annealing temperature increase from 600 to 700 °C does not induce significant changes in the topographical profile. However, BNT-BT thin films annealed at 600 °C displayed more anisotropic surface microtexture, high spatial complexity, and low spatial frequencies. For the reactive surface of BNT-BT films, the electroanalytical assays showed that electrons from the conduction band are captured by oxygen adsorbed on the film surface, forming superoxide radicals that attack ciprofloxacin molecules, promoting their degradation. The best performance observed for the BNT-BT thin films annealed at 600 ºC is attributed to their unique structural and micromorphological properties compared to the films annealed with higher temperatures. Our results prove that the proposed thin film deposition process is a promising approach for developing new electrocatalytic devices. © 2022, The Authors. All rights reserved.

关键词： Sol-gels

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