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SSRN 2025年

作者： Nicolae, Carmen-Valentina Jahani Kadousaraei, Masoumeh Yamada, Shuntaro Aydin, Mehmet Serhat Al-Sharabi, Niyaz Campodoni, Elisabetta Sandri, Monica Steinmüller-Nethl, Doris Syverud, Kristin Rashad, Ahmad Stancu, Izabela Cristina Mustafa, Kamal Advanced Polymer Materials Group University Politehnica of Bucharest 1-7 Gh. Polizu Street Bucharest011061 Romania Center of Translational Oral Research Department of Clinical Dentistry Faculty of Medicine University of Bergen Bergen Norway CNR-ISTEC Institute of Science and Technology for Ceramics National Research Council of Italy Faenza Italy DiaCoating GmbH Wattens Austria RISE PFI AS Trondheim Norway Bioengineering Graduate Program Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN46556 United States

The development of bioinks for bone tissue engineering (BTE) requires a precise balance of printability, stability and bioactivity to ensure cell viability while supporting cell attachment, proliferation and osteogenic differentiation. Although numerous bioink formulations for BTE demonstrate good printability and bioactivity, they often lack the stability or osteogenic potential required to support long-term bone regeneration. To address these limitations, we developed multicomponent formulations for extrusion-based bioprinting by combining TEMPO-oxidized cellulose nanofibrils (TO-CNFs) with gelatin methacryloyl (GelMA) and sodium alginate (SA). The formulation was further loaded with nanodiamond particles (NDs), magnesium-doped nanohydroxyapatite (MgHA) or a combination of both to impart synergistic effects. This study investigates the individual and combined effects of NDs and MgHA on the printability, structural integrity, biocompatibility, and osteogenic performance of the bioink, hypothesizing that a dual nanoparticle system could provide superior multifunctionality. Rheological and printability tests confirmed that the incorporation of NDs improved the structural integrity and printing fidelity of the printed structures, with all formulations showing comparable mechanical properties. Seeded human gingival fibroblasts showed enhanced viability and spreading, and favorable metabolic activity and proliferation on ND-containing hydrogels. While the viability and elongation of bioprinted osteoblast-like cells in all four bioinks were comparable, MgHA-containing bioinks promoted osteogenic differentiation of osteoblasts, shown by increased Runx2 expression, ALP activity, and biomineralization. These findings suggest that the combined incorporation of NDs and MgHA within the TO-CNFs-GelMA-SA matrix provides a promising platform with robust printability and enhanced bioactivity, addressing the current trade-offs in the design of bioinks for comprehensive BTE. © 2025,

关键词： Bone

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Modeling the adsorption of ciprofloxacin on magnetic biochar: A comparative study of traditional and advanced approaches

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Journal of Water Process engineering 2025年 74卷

作者： Fuhr, Ana Carolina Ferreira Piazzi Rodrigues, Daniel Lucas Costa Guido, Júlia Amaral de Azevedo, Cristiane Ferraz de Souza, Nicholas Fernandes Dotto, Guilherme Luiz Lima, Eder Claudio Machado Machado, Fernando Technology Development Center Federal University of Pelotas (UFPel) 1 Gomes Carneiro St RS Pelotas 96010-610 Brazil Materials Science and Engineering Graduate Program Federal University of Pelotas (UFPel) 1 Gomes Carneiro St. RS Pelotas 96010-610 Brazil Center of Engineering Federal University of Pelotas 989 Benjamin Constant St. RS Pelotas 96010-020 Brazil Environmental Science Graduate Program Federal University of Pelotas (UFPel) 989 Benjamin Constant St. RS Pelotas 96010-020 Brazil Chemical Engineering Department Federal University of Santa Maria (UFSM) 1000 Roraima Av. RS Santa Maria 97105-900 Brazil Institute of Chemistry Federal University of Rio Grande do Sul (UFRGS) 9500 Bento Gonçalves Av. Postal Box 15003 RS Porto Alegre 91501-970 Brazil

This study prepared magnetic-activated biochar (MAB) through microwave pyrolysis and chemical activation of olive agro-industrial biomass. The adsorbent was characterized by SEM-EDS, FTIR, XRD, N₂ adsorption/desorption, VSM, IEP, and pH point of zero charge techniques, indicating different structural properties. The adsorption capacity for ciprofloxacin (CIP) removal was evaluated through batch tests, assessing kinetics and equilibrium. The adsorption kinetics followed the general order model. The process was fast, with MAB achieving a half-adsorption time of up to 3 min. In contrast, the Liu model showed a maximum capacity of 215 mg g⁻¹ at 328 K. Statistical models indicated multilayer adsorption, with layer numbers varying from 3.4 to 2.1. The temperature significantly affects steric parameters, increasing the number of CIP molecules adsorbed per site while reducing the number of layers formed. Thermodynamic analysis suggested physical interactions, including hydrogen bonding and π-π interactions, as the primary removal mechanisms. A simulated effluent test demonstrated a 98.98 % removal efficiency, confirming MAB's effectiveness in removing emerging pollutants like CIP and its potential for wastewater treatment applications. MAB can be easily recovered from aqueous media using magnetic fields. Additionally, its adsorption capacity can be regenerated using green solvent elution. These characteristics highlight its potential for wastewater treatment of contaminants of emerging concern. © 2025 Elsevier Ltd

关键词： Adsorption Biomass Contaminants of emerging concern Physical interactions Statistical physics

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Rheological and stability analysis of cement pastes incorporating silica-based wastes

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Particuology 2024年第6期89卷 144-152页

作者： Julia da Rosa Martins Janaíde Cavalcante Rocha Dachamir Hotza Luciano Senff Graduate Program in Materials Science and Engineering(PPGMAT) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Civil Engineering(PPGEC) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Graduate Program in Chemical Engineering(POSENQ) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Department of Mobility Engineering Federal University of Santa Catarina(UFSC)Joinville89219-600SCBrazil

This study investigates the influence of waste characteristics,especially zeta potential,on the properties of cement pastes and *** focus is to evaluate the impact of the zeta potential of cement particles and waste materials on the sedimentation speed,rheology,and hardening time of stabilized cement *** Cement II F 40,retarder additive,silica,and fly ash were used in the *** pastes were prepared,and during the stabilization period,their rheological properties and pH were *** zeta potential and sedimentation speed of the cement and waste particles were measured at the pH that the pastes presented during the entire stabilization *** the stabilization period,the pastes were subjected to the hardening time *** zeta potential analyses revealed diverse values for the different powder types,with the cement particles exhibiting a zeta potential of−3.0 mV,the silica particles exhibiting−10.5 mV,and the fly ash particles exhibiting−20.3 *** influence of the high zeta potential modulus was observed on the sedimentation speed,with the solution containing fly ash exhibiting a speed of 40.01μm/s,whereas the solution containing only cement exhibited a speed of 99.38μm/*** the pastes,the results indicate that the presence of fly ash particles with a significantly negative zeta potential led to a 16%reduction in hardening time compared to particles with a lower modulus of zeta *** tests showed that the inclusion of fly ash particles prevented the formation of *** the zeta potential influenced agglomerate formation and hardening time,it was found to have no effect on yield stress or viscosity.

关键词： Wastes Zeta potential Setting time Rheometry

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PVA-based bioinks for 3D bioprinting: A comprehensive review of their applications in tissue engineering

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Bioprinting 2025年 49卷

作者： Narges Johari Zary Adabavazeh Francesco Baino Materials Engineering Group Golpayegan College of Engineering Isfahan University of Technology Golpayegan Iran Ph.D. Program Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology Taichung Taiwan ROC Institute of Materials Physics and Engineering Department of Applied Science and Technology Politecnico di Torino Torino Italy

3D bioprinting is an innovative approach that overcomes the limitations of traditional methods for creating cell-laden biomaterials and constructs. It allows for the fabrication of complex and biologically active tissue structures. This review aims to provide a comprehensive evaluation of polyvinyl alcohol (PVA)-based bioinks within a 3D bioprinting framework. PVA-based bioinks exhibit remarkable properties, such as biocompatibility, biodegradability, and the ability to enhance cell growth and differentiation. These properties make them appropriate for many tissue engineering applications. The study evaluates the physicochemical and biological properties of PVA bioinks, including how they combine with other materials such as gelatin, chitin, chitosan, alginate, agarose, cellulose, κ-carrageenan, methacrylate, nanoparticles, mineral additives, carbon nanotubes, graphene oxide, and extracellular matrix components. Furthermore, this review evaluates the benefits of market availability and enhanced printing resolution, in addition to the challenges posed by complexity, dependency on support baths, and the risk of contamination. The objective of this review is to draw attention to the capabilities of PVA-based bioinks and provide guidelines for future research to improve the effectiveness of these materials in tissue engineering and regenerative medicine.

关键词： Bioprinting Bioink Polyvinyl alcohol PVA-based bioinks

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Recent advances in electronic devices for monitoring and modulation of brain

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Nano Research 2021年第9期14卷 3070-3095页

作者： Yong Won Kwon Yoon Sun Jun Young-Geun Park Jiuk Jang Jang-Ung Park Nano Science Technology Institute Department of Materials Science and EngineeringYonsei UniversitySeoul 03722Republic of Korea Center for Nanomedicine Institute for Basic Science(IBS)Seoul 03722Republic of Korea Graduate Program of Nano Biomedical Engineering(NanoBME) Advanced Science InstituteYonsei UniversitySeoul 03722Republic of Korea

The brain is actuated by billions of neurons with trillions of interconnections that regulate human *** the mechanisms of these systems that induce sensory reactions and respond to disease remains one of the greatest challenges in science,engineering,and *** advances in nanomaterials and nanotechnologies have led to the extensive research of electronic devices for brain interfaces to better understand the neural activities of the brains complex nervous *** development of sensor devices for monitoring the physiological signals of the brain related to traumatic injury status has accompanied by the progress of electronic neural probes in *** addition,these neurological and stereotactic surgical revolutions hold immense potential for clinical analysis of pharmacological systems within cerebral ***,we review the progress of electronic devices interfacing with brain in terms of the materials,fabrication technologies,and device *** activity can be measured and modulated by brain probes based on newly developed nanofabrication ***,in vivo pathological monitoring of the brain and pharmacological assessment has been developed in miniaturized and wireless *** also consider the key challenges and prospects for further development,and explore the future directions emerging in the latest research.

关键词： neural interfaces neural recording neuromodulation intracranial pressure monitoring microfluidic drug delivery

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Low-temperature sintered LZSA cellular glass ceramics

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6th Pacific Rim Conference on Ceramic and Glass Technology, PacRim6

作者： Sousa, E. Rambo, C.R. Hotza, D. De Oliveira, A.P. Novaes Fey, T. Graduate Program on Materials Science and Engineering - PGMAT Department of Chemical Engineering - EQA Federal University of Santa Catarina P.O. Box 476 88040-900 Florianópolis SC Brazil Department of Materials Science Glass and Ceramics University of Erlangen-Nuremberg Martensstrasse 5 D-91058 Erlangen Germany

ISBN: (纸本)0470080507

Commercial polyurethane foams with a monomodal pore size distribution were used to produce LZSA glass ceramic foams by the polymeric sponge method. A suspension containing LZSA glass ceramic, bentonite and sodium silicate, was prepared in water and isopropanol media to impregnate the polymeric foams by dip coating. The suspension was characterized by Theological measurements. The effect of the solvent on the microstructure and physical properties on the LZSA foams was also evaluated. The cellular microstructure of the glass-ceramic foams was characterized by scanning electron microscopy (SEM) and micro-computer X-ray tomography (μ-CT). The LZSA foam prepared with isopropanol suspension exhibited higher mechanical strength under compression than those prepared with water.

关键词： Glass ceramics

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Accessing the viscera: Technologies for interoception research

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Current Opinion in Neurobiology 2025年 93卷 103050-103050页

作者： Pang, Karen K.L. Mondal, Rajib Sahasrabudhe, Atharva Anikeeva, Polina Department of Brain and Cognitive Sciences Massachusetts Institute of Technology United States K. Lisa Yang Brain-Body Center Massachusetts Institute of Technology United States McGovern Institute for Brain Research Massachusetts Institute of Technology United States Research Laboratory of Electronics Massachusetts Institute of Technology United States MIT-Harvard Graduate Program in Health Sciences and Technology United States Department of Materials Science and Engineering Massachusetts Institute of Technology United States

Interoception, or the perception and regulation of body signals by the central nervous system, is critical for maintaining homeostasis and coordination of behaviors. Deciphering the mechanisms of interoception requires identifying pathways and decoding of diverse signals across the brain-body axis. These studies are enabled by tools to modulate and record physiological processes in the brain and visceral organs. While numerous advanced neurotechnologies are well-established in the brain, these techniques often offer limited utility for other organs, such as the gastrointestinal tract, heart, liver, or bladder. In this review, we highlight recent advances in technologies for recording and modulation of visceral organ physiology in small animals in vivo, with a focus on implantable bioelectronic organ interfaces that can be deployed in behaving animals. We discuss how such interfaces are made possible through innovations in materials and electronics and outline unmet technological challenges in interoception research. © 2025 Elsevier Ltd

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Alumina sol bonded castables for blast furnace main troughs. Part 1 - dispersants, gelling agents and secondary binders.

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Ceramics International 2025年

作者： L.B. Nascimento V.G. Domiciano V.C. Pandolfelli RHI Magnesita GmbH Technology Center Leoben Austria Federal University of São Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil RHI Magnesita Research and Development Center Contagem Brazil

Calcium aluminate cement (CAC) is broadly used in refractory compositions due to its advantages, although CaO can affect the castable’s hot properties when silica is present. The need for higher-temperature applications and tougher conditions has led to innovations in high-performance materials, focusing on reducing CAC content and using binders without CaO or SiO 2 . Although progress has been made in their application, these binders still have limitations. Colloidal alumina is particularly promising for generating a silica-free system with higher refractoriness and lower liquid phase formation, depending on the refractory composition. Based on these aspects, this work evaluated the influence of using colloidal alumina as a binder in refractory castables (Al 2 O 3 -SiC-C) for blast furnace main troughs, comparing its properties to a commercially available silica sol castable. The influence of different dispersants, gelling agents and secondary binders on the properties of both sol-bonded castables was investigated. The results indicated that citric acid was the most effective dispersant in providing suitable rheological behavior based on its interaction with alumina particles (electrostatic mechanism), magnesia sinter and calcium aluminate cement. Furthermore, using optimized amounts of citric acid, MgO and CAC, a colloidal alumina-bonded refractory composition with higher green mechanical strength and suitable working time was obtained compared to the colloidal silica castable used as reference.

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Unconventional assemblies of bisacylhydrazones:The role of water for circularly polarized luminescence

Aggregate

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Aggregate 2022年第5期3卷 185-193页

作者： Hye Jin Cho Dong Yeun Jeong Hwihyun Moon Taewoo Kim You Kyoung Chung Yeongdong Lee Zonghoon Lee Joonsuk Huh Youngmin You Changsik Song Department of Chemistry Sungkyunkwan UniversitySuwonGyeonggi 16419Republic of Korea Division of Chemical Engineering and Materials Science Graduate Program in System Health Science and EngineeringEwha Womans UniversitySeoul 03760Republic of Korea Center for Multidimensional Carbon Materials Institute for Basic Science(IBS)Department of Materials Science and EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

Understanding the precise molecular arrangement of chiral supramolecular polymers is essential not only to comprehend complex superstructures like proteins and DNA but also for the development of next-generation optoelectronic materials,including materials displaying high-performance circularly polarized luminescence(CPL).Herein,we report the first chiral supramolecular polymer systems based on hydrazone–pyridinium conjugates comprising alkyl chains of different lengths,which afforded control of the apparent supramolecular *** supramolecular chirality is governed basically by the remote chiral centers of alkyl chains,helicity inversion was achieved by controlling the conditions under which the hydrazone building blocks underwent aggregation(i.e.,solvent compositions or temperature).More importantly,the addition of water to the system led to aggregationinduced hydrazone deprotonation,which resulted in a completely different selfassembly *** water molecules played an essential role,forming the assembly’s channel-like backbone,around which hydrazone molecules gathered as a result of hydrogen bonding *** co-assembly of an achiral hydrazone luminophore with the given supramolecular polymer system allowed the fabrication of a novel CPL-active hydrazone-based material exhibiting a high maximum value for the photoluminescence dissymmetry factor of -2.6×10^(-2).

关键词： circularly polarized luminescence(CPL) helicity control hydrazone self-assembly structural water supramolecular polymerization

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Ionic oxidation in cathodic cage of titanium CP grade II

Ionic oxidation in cathodic cage of titanium CP grade II

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作者： Vitoriano, Jussier Oliveira Braz, Danilo Cavalcante Barbosa, Geovani Ferreira Araújo, Francisco Odolberto Alves, Clodomiro Post-Graduate Program in Materials Science and Engineering Universidade Federal Rural do Semi-Árido Brazil

Titanium oxides such as rutile and anatase, are materials that stand out for exhibiting properties that act in biomedical and photocatalytic applications, among others. It is extreme importance to idealize new techniques that produce such compounds, being indispensable the improvement of characterizations for these materials. For this purpose, titanium comercially pure (CP) grade II cylindrical samples were oxidized ionically using titanium cage electric shields, oxidized at 350 ° C in 3 and 8 hours. Through Grazing Incidence X-ray Diffraction (GIXRD) analysis, was observed on the surface of the treated samples the formation of a TiO2 film with the anatase, rutile and brookite phases, the latter phase cited being difficult to produce in conventional thermochemical treatments. All samples treated showed a significant increase in wettability using distilled water. The higer value was for the sample with a 8 hours treatment time, in which this condition presented phases with greater intensity in the analysis of GIXRD. © 2017 Universidade Federal de Sao Carlos. All rights reserved.

关键词： Titanium dioxide

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