jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Fulong Li | Chao Chen | Xiaohong Chen
Source: RSC Advances (review, 2024-01-01)
Field: Materials Science — Biomaterials

Tremendous advances, multifaceted challenges and feasible future prospects of biodegradable medical polymer materials In recent years, biodegradable medical polymer materials (BMPMs) have stood out among many biomedical materials due to their unique advantages, such as high mechanical strength, good biocompatibility, strong corrosion resistance and excellent processability. In this review, we first provide a brief introduction of biodegradable medical materials from both natural and synthetic perspectives, and then systematically categorize BMPMs based on their applications in clinical medicine and highlight the great progress they have made in recent years. Additionally, we also point out several overlooked areas in the research of BMPMs, offering guidance for comprehensive future exploration of these materials. Finally, in view of the complex challenges faced by BMPMs today, their future directions are scientifically proposed. This work contributes to the ongoing efforts of BMPMs in the biomedical field and provides a steppingstone for developing more effective BMPM-based products for clinical applications. Nanotechnology ; Work (physics) ; Engineering ethics ; Field (mathematics) ; Biochemical engineering ; Risk analysis (engineering) ; Materials science ; Engineering ; Medicine ; Mechanical engineering biodegradable polymer synthesis and properties ; Bone Tissue Engineering Materials ; Electrospun Nanofibers in Biomedical Applications
Authors: Yang Lv | Chengjie Gong | Yu Zhen Dong | Hyoung Jin Choi
Source: Materials (article, 2024-04-18)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Synthesis of rGO/CoFe2O4 Composite and Its Magnetorheological Characteristics In this study, composite particles of rGO/CoFe<sub>2</sub>O<sub>4</sub> were synthesized using a solvothermal method to fabricate a low-density magnetorheological (MR) material with enhanced sedimentation stability. The morphology and crystallographic features of rGO/CoFe<sub>2</sub>O<sub>4</sub> were characterized via SEM, TEM, and XRD, and its magnetic properties were tested using VSM. The MR fluid was formulated by blending rGO/CoFe<sub>2</sub>O<sub>4</sub> particles into silicone oil. Under different magnet strengths (<i>H</i>), a rotational rheometer was used to test its MR properties. Typical MR properties were observed, including shear stress, viscosity, storage/loss modulus, and dynamic yield stress (τdy) following the Herschel-Bulkley model reaching 200 Pa when <i>H</i> is 342 kA/m. Furthermore, the yield stress of the MR fluid follows a power law relation as <i>H</i> increases and the index changes from 2.0 (in the low <i>H</i> region) to 1.5 (in the high <i>H</i> region). Finally, its MR efficiency was calculated to be about 10<sup>4</sup>% at <i>H</i> of 342 kA/m. Composite number ; Magnetorheological fluid ; Materials science ; Composite material ; Graphene ; Structural engineering ; Nanotechnology ; Engineering Multiferroics and related materials ; Vibration Control and Rheological Fluids ; Magnetic Properties and Synthesis of Ferrites
Authors: Supharat Inphonlek | Supawat Kotchapradit | Boonruang Marungsri | Yupaporn Ruksakulpiwat
Source: Polymers (article, 2024-11-20)
Field: Materials Science — Biomaterials

Enhanced Dielectric Properties and Antibacterial Activity of Natural Rubber by Modification with Poly(Acrylic Acid-Co-Acrylamide) Incorporating Silver Nanoparticles and Titanium Dioxide This work aims to enhance natural rubber's dielectric properties and antibacterial activity by incorporating silver nanoparticles and titanium dioxide. Deproteinized natural rubber (DPNR) was modified through the graft copolymerization of acrylic acid and acrylamide using N', N'-Methylenebisacrylamide as a crosslinking agent, resulting in poly(acrylic acid-co-acrylamide)-modified, deproteinized natural rubber (MDPNR). This modification facilitated coordination with silver ions and interaction with titanium dioxide. Silver nanoparticles were generated under heat and pressure. Modified natural rubber composites containing silver nanoparticles and titanium dioxide (MDPNR/Ag-TiO<sub>2</sub>) were prepared. Scanning electron microscopy (SEM) revealed well-distributed silver in the modified natural rubber matrix, while agglomeration of titanium dioxide was observed at a high loading. Both MDPNR and MDPNR/Ag-TiO<sub>2</sub> showed high thermal stability compared to DPNR. The MDPNR/Ag-TiO<sub>2</sub> composites exhibited higher Tg and lower tan δ, indicating higher stiffness due to the restriction of chain movement compared to that in MDPNR. DPNR exhibited a low dielectric constant, enhanced by poly(acrylic acid-co-acrylamide) modification and silver nanoparticle/titanium dioxide incorporation. Incorporating 0.5 phr of AgNO<sub>3</sub> and 2.5 phr of TiO<sub>2</sub> in the composites increased the dielectric constant by 1.33 times compared to that of MDPNR. MDPNR showed no antibacterial activity, while the MDPNR/Ag-TiO<sub>2</sub> composites exhibited promising antibacterial activity against <i>Staphylococcus aureus</i> and <i>Escherichia coli</i>. Titanium dioxide ; Acrylamide ; Natural rubber ; Acrylic acid ; Materials science ; Nanoparticle ; Chemical engineering ; Surface modification ; Nuclear chemistry ; Polymer chemistry ; Polymer ; Chemistry ; Composite material ; Nanotechnology ; Copolymer Nanocomposite Films for Food Packaging ; Polymer Nanocomposite Synthesis and Irradiation ; Dielectric materials and actuators
Authors: Federica Cefalì | Anna Iuliano | Federica Balzano | Gloria Uccello‐Barretta | Valerio Zullo | Carlo Baldassari
Source: Molecules (article, 2024-03-15)
Field: Chemistry — Spectroscopy

Isohexide-Based Tunable Chiral Platforms as Amide- and Thiourea-Chiral Solvating Agents for the NMR Enantiodiscrimination of Derivatized Amino Acids New arylamide- and arylthiourea-based chiral solvating agents (CSAs) were synthesized starting from commercially available isomannide and isosorbide. The two natural isohexides were transformed into the three amino derivatives, having isomannide, isosorbide, and isoidide stereochemistry, then the amino groups were derivatized with 3,5-dimethoxybenzoyl chloride or 3,5-bis(trifluoromethyl)phenyl isothiocyanate to obtain the CSAs. Bis-thiourea derivative containing the 3,5-bis(trifluoromethyl)phenyl moiety with exo-exo stereochemistry was remarkably efficient in the differentiation of NMR signals (NH and acetyl) of enantiomers of <i>N</i>-acetyl (<i>N</i>-Ac) amino acids in the presence of 1,4-diazabicyclo[2,2,2]octane (DABCO). Nonequivalences in the ranges of 0.104-0.343 ppm and 0.042-0.107 ppm for NH and acetyl groups, respectively, allowed for very accurate enantiomeric excess determination, and a reliable correlation was found between the relative positions of signals of enantiomers and their absolute configuration. Therefore, a complete stereochemical characterization could be performed. Dipolar interactions detected in the ternary mixture CSA/<i>N</i>-Ac-valine/DABCO led to the identification of a different interaction model for the two enantiomers, involving the formation of a one-to-one substrate/CSA complex for (<i>S</i>)-<i>N</i>-Ac-valine and a one-to-two complex for (<i>R</i>)-<i>N</i>-Ac-valine, as suggested by the complexation stoichiometry. Chemistry ; Enantiomer ; Moiety ; Trifluoromethyl ; Thiourea ; Stereochemistry ; Amide ; Isosorbide ; Absolute configuration ; Organic chemistry Molecular spectroscopy and chirality ; Analytical Chemistry and Chromatography ; Metabolomics and Mass Spectrometry Studies
Authors: Zhikun Jia | Guangming Han | Hu Jin | Min Xu | Erbao Dong
Source: Biomimetics (article, 2024-01-06)
Field: Materials Science — Materials Chemistry

Design and Force/Angle Independent Control of a Bionic Mechanical Ankle Based on an Artificial Muscle Matrix Inspired by the natural skeletal muscles, this paper presents a novel shape memory alloy-based artificial muscle matrix (AMM) with advantages of a large output force and displacement, flexibility, and compactness. According to the composition of the AMM, we propose a matrix control strategy to achieve independent control of the output force and displacement of the AMM. Based on the kinematics simulation and experiments, we obtained the output displacement and bearing capacity of the smart digital structure (SDS) and confirmed the effectiveness of the matrix control strategy to achieve force and displacement output independently and controllably. A bionic mechanical ankle actuated by AMM was proposed to demonstrate the actuating capability of the AMM. Experimental results show that the angle and force of the bionic mechanical ankle are output independently and have a significant gradient. In addition, by using a self-sensing method (resistance self-feedback) and PD control strategy, the output angle and force of the bionic mechanical ankle can be maintained for a long time without overheating of the AMM. Kinematics ; Ankle ; Control theory (sociology) ; Artificial muscle ; Pneumatic artificial muscles ; Displacement (psychology) ; Matrix (chemical analysis) ; Computer science ; Materials science ; Engineering ; Physics ; Control (management) ; Artificial intelligence ; Actuator ; Composite material Shape Memory Alloy Transformations ; Advanced Sensor and Energy Harvesting Materials ; Advanced Materials and Mechanics
Authors: Beau Van Vaerenbergh | Jeroen Lauwaert | Joris Thybaut | Pieter Vermeir | Jeriffa De Clercq
Source: International Journal of Hydrogen Energy (article, 2024-02-02)
Field: Materials Science — Materials Chemistry

Ion exchange resin supported cobalt boride as highly efficient catalyst for the hydrolysis of a concentrated alkaline stabilized sodium borohydride solution: A catalyst de-/reactivation study Sodium borohydride ; Catalysis ; Cobalt ; Chemistry ; Hydrolysis ; Ion exchange ; Inorganic chemistry ; Sodium ; Ion-exchange resin ; Boride ; Nuclear chemistry ; Ion ; Organic chemistry Hydrogen Storage and Materials ; Hybrid Renewable Energy Systems ; Ammonia Synthesis and Nitrogen Reduction
Authors: Chaohui Li | Qianqian Yan | Huanjun Xu | Siyu Luo | Hui Hu | Shenglin Wang | Xiaofang Su | Songtao Xiao | Yanan Gao
Source: Molecules (article, 2024-05-10)
Field: Materials Science — Materials Chemistry

Highly Efficient Capture of Volatile Iodine by Conjugated Microporous Polymers Constructed Using Planar 3- and 4-Connected Organic Monomers The effective capture and recovery of radioiodine species associated with nuclear fuel reprocessing is of significant importance in nuclear power plants. Porous materials have been proven to be one of the most effective adsorbents for the capture of radioiodine. In this work, we design and synthesize a series of conjugated microporous polymers (CMPs), namely, TPDA-TFPB CMP, TPDA-TATBA CMP, and TPDA-TECHO CMP, which are constructed based on a planar rectangular 4-connected organic monomer and three triangular 3-connected organic monomers, respectively. The resultant CMPs are characterized using various characterization techniques and used as effective adsorbents for iodine capture. Our experiments indicated that the CMPs exhibit excellent iodine adsorption capacities as high as 6.48, 6.25, and 6.37 g g<sup>-1</sup> at 348 K and ambient pressure. The adsorption mechanism was further investigated and the strong chemical adsorption between the iodine and the imine/tertiary ammonia of the CMPs, 3D network structure with accessible hierarchical pores, uniform micromorphology, wide π-conjugated structure, and high-density Lewis-base sites synergistically contribute to their excellent iodine adsorption performance. Moreover, the CMPs demonstrated good recyclability. This work provides guidance for the construction of novel iodine adsorbent materials with high efficiency in the nuclear power field. Adsorption ; Monomer ; Microporous material ; Materials science ; Chemical engineering ; Polymer ; Conjugated microporous polymer ; Polymer chemistry ; Organic chemistry ; Chemistry ; Composite material Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Head and Neck Surgical Oncology
Authors: Michela Iebole | V. Braccini | Cristina Bernini | A. Malagoli | Nicola Manca | A. Martinelli | Matteo Cialone | M. Putti | Shiv J. Singh | Giovanna Latronico | Paolo Mele
Source: Materials (article, 2024-05-28)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Fe(Se,Te) Thin Films Deposited through Pulsed Laser Ablation from Spark Plasma Sintered Targets Iron-based superconductors are under study for their potential for high-field applications due to their excellent superconducting properties such as low structural anisotropy, large upper critical fields and low field dependence of the critical current density. Between them, Fe(Se,Te) is simple to be synthesized and can be fabricated as a coated conductor through laser ablation on simple metallic templates. In order to make all the steps simple and fast, we have applied the spark plasma sintering technique to synthesize bulk Fe(Se,Te) to obtain quite dense polycrystals in a very short time. The resulting polycrystals are very well connected and show excellent superconducting properties, with a critical temperature onset of about 16 K. In addition, when used as targets for pulsed laser ablation, good thin films are obtained with a critical current density above 10<sup>5</sup> A cm<sup>-2</sup> up to 16 T. Materials science ; Spark plasma sintering ; Laser ablation ; Thin film ; Plasma ; Pulsed laser deposition ; Superconductivity ; Laser ; Ablation ; Anisotropy ; Conductor ; Current density ; Optoelectronics ; Composite material ; Sintering ; Condensed matter physics ; Nanotechnology ; Optics Iron-based superconductors research ; Rare-earth and actinide compounds ; Corporate Taxation and Avoidance
Authors: Anca Awal Sembada | Ryuta Harada | Shinya Maki | Toshiyuki Fukuhara | Takeshi Suzuki | I. Wuled Lenggoro
Source: Discover Agriculture (article, 2024-01-22)
Field: Materials Science — Materials Chemistry

Candle soot colloids enhance tomato (Solanum lycopersicum) seed germination and seedling quality Abstract The effect of candle soot colloids, a novel nanomaterial from candle combustion that we developed previously, on tomato ( Solanum lycopersicum ) seed germination and seedling vigor was investigated. Candle soot colloids were applied at different concentrations and hydrophobicities to tomato seeds and germination parameters and seedling vigor characteristics, such as length, fresh weight, dry weight, chlorophyll, and carotenoids, were measured. It was found that candle soot colloids significantly improved germination speed, seedling length, and seedling fresh weight compared to the control. The adherence of soot particles to the trichomes on the seed surface, which may help seeds retain moisture and stay hydrated, was observed. The chemical composition of the soot samples was analyzed using gas chromatography-time of flight mass spectrometry and two different chemical constituents in hydrophilic and hydrophobic soot samples that may affect seed germination were identified. A new potential use of candle soot colloids as plant growth-promoting agents and insights into the effects of nanomaterials on plant physiology and biochemistry were revealed by this study. Seedling ; Germination ; Soot ; Solanum ; Candle ; Horticulture ; Dry weight ; Botany ; Chemistry ; Biology ; Combustion Nanoparticles: synthesis and applications ; Plant Growth Enhancement Techniques ; Coagulation and Flocculation Studies
Authors: Yihan Li | Yuting Wang | Vikram M. Shenoy | Shuai Niu | Gary J. Jenkins | Hetal Sarvaiya
Source: Rapid Communications in Mass Spectrometry (article, 2024-05-29)
Field: Chemistry — Spectroscopy

Intact quantitation of cysteine‐conjugated antibody‐drug conjugates using native mass spectrometry We demonstrated the feasibility of utilizing nMS for the quantitation of ADCs at the intact protein level in preclinical PK studies. Our results indicate that this intact quantitation workflow can serve as an alternative generic method for high-throughput analysis, enabling an in-depth understanding of ADC stability and safety in vivo. Conjugate ; Antibody-drug conjugate ; Chemistry ; Conjugated system ; Mass spectrometry ; Cysteine ; Drug ; Chromatography ; Antibody ; Monoclonal antibody ; Biochemistry ; Pharmacology ; Biology ; Enzyme ; Immunology ; Organic chemistry Mass Spectrometry Techniques and Applications ; Peptidase Inhibition and Analysis ; HER2/EGFR in Cancer Research
Authors: Shengbo Wang | Andrew Collins | Ananth Prakash | Silvie Fexová | Irene Papatheodorou | Andrew R. Jones | Juan Antonio Vizcaíno
Source: Journal of Proteome Research (article, 2024-05-08)
Field: Chemistry — Spectroscopy

Integrated Proteomics Analysis of Baseline Protein Expression in Pig Tissues The availability of an increasingly large amount of public proteomics data sets presents an opportunity for performing combined analyses to generate comprehensive organism-wide protein expression maps across different organisms and biological conditions. <i>Sus scrofa</i>, a domestic pig, is a model organism relevant for food production and for human biomedical research. Here, we reanalyzed 14 public proteomics data sets from the PRIDE database coming from pig tissues to assess baseline (without any biological perturbation) protein abundance in 14 organs, encompassing a total of 20 healthy tissues from 128 samples. The analysis involved the quantification of protein abundance in 599 mass spectrometry runs. We compared protein expression patterns among different pig organs and examined the distribution of proteins across these organs. Then, we studied how protein abundances were compared across different data sets and studied the tissue specificity of the detected proteins. Of particular interest, we conducted a comparative analysis of protein expression between pig and human tissues, revealing a high degree of correlation in protein expression among orthologs, particularly in brain, kidney, heart, and liver samples. We have integrated the protein expression results into the Expression Atlas resource for easy access and visualization of the protein expression data individually or alongside gene expression data. Proteomics ; Protein expression ; Baseline (sea) ; Computational biology ; Biology ; Biochemistry ; Gene Advanced Proteomics Techniques and Applications ; Molecular Biology Techniques and Applications ; Viral Infectious Diseases and Gene Expression in Insects
Authors: Ryo Konno | M. Ishikawa | Daisuke Nakajima | Kaori Inukai | Osamu Ohara | Yusuke Kawashima
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2024-04-26)
Field: Chemistry — Spectroscopy

Thin-diaPASEF: diaPASEF for maximizing proteome coverage in single-shot proteomics Abstract Proteomics using mass spectrometry (MS) has significantly advanced, offering deep insights into complex proteomes. The timsTOF MS platform with its parallel accumulation-serial fragmentation (PASEF) technology has achieved high scan speeds and high-quality spectra. Buker’s timsTOF HT, which features TIMS-XR technology, offers an improved dynamic range and analysis depth, supporting high sample loadings. Moreover, various improvements to the data-independent acquisition method based on the PASEF technology (diaPASEF) have been reported. Despite these advancements, most high-level deep proteomic reports are based on the Orbitrap Astral and Orbitrap Exploris 480, and analytical systems using timsTOF MS still require improvement. Here, Bruker’s timsTOF HT was used to validate and optimize key diaPASEF parameters, leading to the development of a Thin-diaPASEF method. This method provides a high quantitative accuracy and consistency. In our validation, 9,400 proteins were identified in a single shot from HEK cells (strictly controlled Protein false discovery rate &lt; 1%), the highest number analyzed by the timsTOF MS series using standard human cultured cells. Furthermore, by combining Thin-diaPASEF with an improved Lycopersicon esculentum lectin method, over 5,000 proteins were identified in a 24-sample/d analysis, and we succeeded in constructing a system with high proteome coverage that can be used for biomarker discovery. Column (typography) ; Proteomics ; Computer science ; Chemistry ; Telecommunications Advanced Proteomics Techniques and Applications ; Advanced Biosensing Techniques and Applications ; Glycosylation and Glycoproteins Research
Authors: Nikita A. Shekhovtsov | Елена Б. Николаенкова | S. N. Vorobyeva | Alexey A. Ryadun | Mark B. Bushuev
Source: Journal of Photochemistry and Photobiology A Chemistry (article, 2024-10-19)
Field: Chemistry — Physical and Theoretical Chemistry

Coordination-driven molecular switch on the base of an ESIPT-capable pyrimidine ligand: Synthesis, fine-tuning of emission by the halide anion and theoretical studies Chemistry ; Halide ; Ligand (biochemistry) ; Pyrimidine ; Coordination complex ; Ion ; Base (topology) ; Photochemistry ; Combinatorial chemistry ; Inorganic chemistry ; Stereochemistry ; Organic chemistry ; Receptor ; Metal Photochemistry and Electron Transfer Studies ; Lanthanide and Transition Metal Complexes ; Porphyrin and Phthalocyanine Chemistry
Authors: Wendy A. Jonkers | Anna M. C. Maan | Ruud Bonekamp | Lieke Pieters | Esra te Brinke | Wiebe M. de Vos
Source: ACS Applied Polymer Materials (article, 2024-08-10)
Field: Materials Science — Surfaces, Coatings and Films

From Brush to Barrier: Fine-Tuning Donnan Exclusion in Polyelectrolyte Multilayer Membranes with Polymer Brushes Polyelectrolyte multilayer (PEM) membranes are widely used in nanofiltration applications. Selective PEM layers are constructed by alternate adsorption of polycations and polyanions to a porous support membrane. A vital aspect of this process is charge overcompensation, which facilitates the adsorption of the next polyelectrolyte layer. However, as a result of charge overcompensation, PEM membranes always have a charged surface, which contributes to Donnan exclusion of ions. High ion retentions can be undesirable in some applications as it complicates concentrate treatment and requires remineralization of the permeate. Therefore, we propose using diblock copolymers (DBCs) as the terminating layer of the PEM coating to diminish Donnan exclusion. DBCs can limit charge overcompensation by preventing further adsorption through steric hindrance. Poly(2-(dimethylamino)ethyl methacrylate)-block-poly(ethylene glycol) (PDMAEMA-b-PEG) DBCs were used as model DBCs. The length of the PDMAEMA block was systematically changed to study the effect of the anchor block length on membrane properties. We demonstrate that DBCs can indeed be used to tune the salt retention in Donnan-dominated poly(diallyldimethylammonium chloride) (PDADMAC)/poly(sodium 4-styrenesulfonate) (PSS) membranes. For DBCs containing an anchor block length of 114 monomers, even a nearly neutral membrane surface could be achieved. Importantly, this tunability of the ion retention can be achieved without diminishing the membrane’s permeability or molecular weight cutoff. The DBC coating does not affect the salt retention in dielectrically dominated poly(allyl amine) hydrochloride/PSS membranes. This confirms the hypothesis that DBCs can be used to specifically tune Donnan exclusion in PEM membranes. The DBC approach is particularly promising when designing membranes for applications with a high scaling risk. Polyelectrolyte ; Brush ; Membrane ; Polymer brush ; Polymer ; Chemical engineering ; Materials science ; Polymer chemistry ; Chemistry ; Composite material Polymer Surface Interaction Studies ; Membrane Separation Technologies ; Molecular Junctions and Nanostructures