jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: T. Ramakrishnan | S. Senthil Kumar | Samson Jerold Samuel Chelladurai | S. Gnanasekaran | N. K. Geetha | Ramesh Arthanari | Baru Debtera
Source: Advances in Materials Science and Engineering (article, 2022-01-28)
Field: Materials Science — Polymers and Plastics

Effect of Moisture Content on Mechanical Properties of AAM Natural Fiber-Reinforced Isophthalic Polyester Composites Composite fiber reinforcement is one such proficient material that substitutes for useful applications for conventional and polyester blends where little weight and thus less energy conservation is required. This study highlighted the importance of recently discovered Agave Angustifolia marginated (AAM) fibers extracted by a manual process from AAM plants. This paper observes the various properties of the mechanical and moisture intake characteristics of AAM fiber and compares these to other naturally occurring fibers. Using isophthalic polyester resin, the mixed chopped AAM fiber-reinforced composite is prepared and detailed preparation techniques are presented. During physical composite testing, fiber pull-outs on the broken samples were investigated. Additionally, the experimental evidence demonstrates that increasing the volume fraction helps to increase the tensile, bending, and modulus of the AAM fiber composite. The chopped fiber isophthalic polyester reinforcement reaches its improved tensile strength and modulus at a 25% Vf about the 20 mm length of the fiber. Materials science ; Composite material ; Fiber ; Ultimate tensile strength ; Composite number ; Polyester ; Modulus ; Isophthalic acid ; Bending ; Polyester resin ; Natural fiber ; Flexural strength ; Terephthalic acid Natural Fiber Reinforced Composites ; Nanocomposite Films for Food Packaging ; Advanced Cellulose Research Studies
Authors: Zewei Cai | Naveen Thirunavukkarasu | Xuefeng Diao | Haoran Wang | Lixin Wu | Chen Zhang | Jianlei Wang
Source: Polymers (review, 2022-10-13)
Field: Materials Science — Materials Chemistry

Progress of Polymer-Based Thermally Conductive Materials by Fused Filament Fabrication: A Comprehensive Review With the miniaturization and integration of electronic products, the heat dissipation efficiency of electronic equipment needs to be further improved. Notably, polymer materials are a choice for electronic equipment matrices because of their advantages of low cost and wide application availability. However, the thermal conductivity of polymers is insufficient to meet heat dissipation requirements, and their improvements remain challenging. For decades, as an efficient manufacturing technology, additive manufacturing has gradually attracted public attention, and researchers have also used this technology to produce new thermally conductive polymer materials. Here, we review the recent research progress of different 3D printing technologies in heat conduction and the thermal conduction mechanism of polymer matrix composites. Based on the classification of fillers, the research progress of thermally conductive materials prepared by fused filament fabrication (FFF) is discussed. It analyzes the internal relationship between FFF process parameters and the thermal conductivity of polymer matrix composites. Finally, this study summarizes the application and future development direction of thermally conductive composites by FFF. Materials science ; Fabrication ; Miniaturization ; Fused filament fabrication ; Electrical conductor ; Thermal conductivity ; Polymer ; Conductive polymer ; Electronics ; Thermal conduction ; Thermal ; Composite material ; Thermal management of electronic devices and systems ; Nanotechnology ; Mechanical engineering ; Electrical engineering Thermal properties of materials ; Additive Manufacturing and 3D Printing Technologies ; Heat Transfer and Optimization
Authors: Zong-Qing Huo | Feng Zhu | Xingwang Zhang | Xiao Zhang | Hongbao Liang | Jingchun Yao | Zhong Liu | Guimin Zhang | Qingqiang Yao | Guo‐Fei Qin
Source: Marine Drugs (review, 2022-05-19)
Field: Chemistry — Spectroscopy

Approaches to Configuration Determinations of Flexible Marine Natural Products: Advances and Prospects Flexible marine natural products (MNPs), such as eribulin and bryostatin, play an important role in the development of modern marine drugs. However, due to the multiple chiral centers and geometrical uncertainty of flexible systems, configuration determinations of flexible MNPs face great challenges, which, in turn, have led to obstacles in druggability research. To resolve this issue, the comprehensive use of multiple methods is necessary. Additionally, configuration assignment methods, such as X-ray single-crystal diffraction (crystalline derivatives, crystallization chaperones, and crystalline sponges), NMR-based methods (JBCA and Mosher's method), circular dichroism-based methods (ECCD and ICD), quantum computational chemistry-based methods (NMR calculations, ECD calculations, and VCD calculations), and chemical transformation-based methods should be summarized. This paper reviews the basic principles, characteristics, and applicability of the methods mentioned above as well as application examples to broaden the research and applications of these methods and to provide a reference for the configuration determinations of flexible MNPs. Druggability ; Nanotechnology ; Computer science ; Chemistry ; Materials science Molecular spectroscopy and chirality ; Metabolomics and Mass Spectrometry Studies ; Computational Drug Discovery Methods
Authors: Shinji Isogami | Y. K. Takahashi
Source: Advanced Electronic Materials (article, 2022-08-09)
Field: Materials Science — Materials Chemistry

Antiperovskite Magnetic Materials with 2<i>p</i> Light Elements for Future Practical Applications Abstract Light elements having 2 p electrons such as B, C, and N are common elements that have played an important role in various functional materials. In particular, nitrides have long been used in the development of semiconductors, superconductors, and magnets. More recently, Fe‐ and Mn‐based antiperovskite‐type compounds with light elements have attracted considerable attention in the field of spintronic engineering, because of the development of intriguing and practical applications making them one of the key materials for future devices. In this article, it is first reviewed the evolution of applications and which light elements are employed. Then the representative applications and characteristics of the light elements, including magnetoresistive effects, magnetization switching, current‐spin and thermoelectric conversions, magnetic anisotropy, and domain nucleation are individually highlighted. Additionally, the crystal structure, fundamental properties, and theoretical study are addressed to enable a deeper understanding of the role of light elements in the unit cell. Beyond compounds with N, a demonstration using B and C is discussed to examine their effect on the magnetic structures of antiperovskite compounds. Finally, prospective and future strategies are discussed to build a platform of practical material based on light elements. Antiperovskite ; Materials science ; Spintronics ; Engineering physics ; Magnetoresistance ; Thermoelectric effect ; Nanotechnology ; Magnet ; Semiconductor ; Nitride ; Condensed matter physics ; Magnetic field ; Optoelectronics ; Ferromagnetism ; Mechanical engineering ; Physics ; Engineering Thermal Expansion and Ionic Conductivity ; Ferroelectric and Piezoelectric Materials ; Multiferroics and related materials
Authors: Inês P. Moreira | Carina Esteves | Susana Palma | Efthymia Ramou | Ana Luı́sa Carvalho | Ana Cecília A. Roque
Source: Materials Today Bio (article, 2022-05-16)
Field: Materials Science — Biomaterials

Synergy between silk fibroin and ionic liquids for active gas-sensing materials Silk fibroin is a biobased material with excellent biocompatibility and mechanical properties, but its use in bioelectronics is hampered by the difficult dissolution and low intrinsic conductivity. Some ionic liquids are known to dissolve fibroin but removed after fibroin processing. However, ionic liquids and fibroin can cooperatively give rise to functional materials, and there are untapped opportunities in this combination. The dissolution of fibroin, followed by gelation, in designer ionic liquids from the imidazolium chloride family with varied alkyl chain lengths (2-10 carbons) is shown here. The alkyl chain length of the anion has a large impact on fibroin secondary structure which adopts unconventional arrangements, yielding robust gels with distinct hierarchical organization. Furthermore, and due to their remarkable air-stability and ionic conductivity, fibroin ionogels are exploited as active electrical gas sensors in an electronic nose revealing the unravelled possibilities of fibroin in soft and flexible electronics. Fibroin ; SILK ; Materials science ; Ionic liquid ; Sericin ; Chemical engineering ; Ionic bonding ; Polymer science ; Composite material ; Chemistry ; Ion ; Organic chemistry ; Catalysis ; Engineering Silk-based biomaterials and applications ; Polydiacetylene-based materials and applications ; Neurobiology and Insect Physiology Research
Authors: Xinru Lin | Na Li | Hongli Tang
Source: Frontiers in Cellular Neuroscience (review, 2022-06-28)
Field: Materials Science — Materials Chemistry

Recent Advances in Nanomaterials for Diagnosis, Treatments, and Neurorestoration in Ischemic Stroke Stroke is a major public health issue, corresponding to the second cause of mortality and the first cause of severe disability. Ischemic stroke is the most common type of stroke, accounting for 87% of all strokes, where early detection and clinical intervention are well known to decrease its morbidity and mortality. However, the diagnosis of ischemic stroke has been limited to the late stages, and its therapeutic window is too narrow to provide rational and effective treatment. In addition, clinical thrombolytics suffer from a short half-life, inactivation, allergic reactions, and non-specific tissue targeting. Another problem is the limited ability of current neuroprotective agents to promote recovery of the ischemic brain tissue after stroke, which contributes to the progressive and irreversible nature of ischemic stroke and also the severity of the outcome. Fortunately, because of biomaterials' inherent biochemical and biophysical properties, including biocompatibility, biodegradability, renewability, nontoxicity, long blood circulation time, and targeting ability. Utilization of them has been pursued as an innovative and promising strategy to tackle these challenges. In this review, special emphasis will be placed on the recent advances in the study of nanomaterials for the diagnosis and therapy of ischemic stroke. Meanwhile, nanomaterials provide much promise for neural tissue salvage and regeneration in brain ischemia, which is also highlighted. Medicine ; Stroke (engine) ; Neuroprotection ; Ischemic stroke ; Ischemia ; Intensive care medicine ; Brain tissue ; Brain ischemia ; Neuroscience ; Internal medicine ; Psychology Advanced Nanomaterials in Catalysis ; Nanoplatforms for cancer theranostics ; Neuroinflammation and Neurodegeneration Mechanisms
Authors: Galina Lujanienė | Raman Novikau | Edith Flora Joel | Karolina Karalevičiūtė | Sergej Šemčuk | Kęstutis Mažeika | Martynas Talaikis | Vidas Pakštas | Saulius Tumėnas | Jonas Mažeika | Kęstutis Jokšas
Source: Molecules (article, 2022-11-19)
Field: Chemistry — Inorganic Chemistry

Preparation of Graphene Oxide-Maghemite-Chitosan Composites for the Adsorption of Europium Ions from Aqueous Solutions The adsorption of Eu(III) on composites synthesised from graphene oxide (GO), maghemite (MGH), and chitosan (CS) has been studied using different approaches. The physicochemical and morphological characteristics of the composites GO-MGH, GO-CS, GO-MGH-CS I, II, and III were determined by XRD, Mössbauer spectroscopy, FTIR, Raman spectroscopy, and TEM. According to the results of batch experiments, the maximum experimental adsorption capacity was 52, 54, 25, 103, and 102 mg/g for GO-MGH, GO-CS, GO-MGH-CS I, II, and III, respectively. The data obtained are in better agreement with the Langmuir, pseudo-second-order, and pseudo-first-order models only for GO-MGH. Thus, the adsorption of Eu(III) on the composites was a favourable, monolayer, and occurred at homogeneous sites. The nature of adsorption is chemical and, in the case of GO-MGH, physical. Tests of the composites in natural waters showed a high removal efficiency for Eu(III), Pu(IV), and Am(III), ranging from 74 to 100%. The ANFIS model has quite good predictive ability, as shown by the values for R<sup>2</sup>, MSE, SSE, and ARE. The GO-MGH-CS composites with the high adsorption capacity could be promising candidates for the removal of Eu(III) and the pre-concentration of Pu(IV) and Am(III) from natural waters. Maghemite ; Adsorption ; Graphene ; Langmuir adsorption model ; Aqueous solution ; Oxide ; Raman spectroscopy ; Materials science ; Fourier transform infrared spectroscopy ; Chitosan ; Europium ; Composite material ; Nuclear chemistry ; Chemistry ; Chemical engineering ; Ion ; Magnetite ; Physical chemistry ; Nanotechnology ; Organic chemistry ; Metallurgy Radioactive element chemistry and processing ; Adsorption and biosorption for pollutant removal ; Extraction and Separation Processes
Authors: Carol Ginsburg‐Moraff | Jonathan E. Grob | Karl Chin | Grant Eastman | Sandra Wildhaber | Mark Bayliss | Heinrich Mues | Marco Palmieri | Jennifer Poirier | Marcel Reck | Alexandre Luneau | Stephane Rodde | John Reilly | Trixie Wagner | Cara E. Brocklehurst | R. Wyler | David W. Dunstan | Alexander N. Marziale
Source: SLAS TECHNOLOGY (article, 2022-08-24)
Field: Chemistry — Spectroscopy

Integrated and automated high-throughput purification of libraries on microscale We herein report the development of an automation platform for rapid purification and quantification of chemical libraries including reformatting of chemical matter to 10 mM DMSO stock solutions. This fully integrated workflow features tailored conditions for preparative reversed-phase (RP) HPLC-MS on microscale based on analytical data, online fraction QC and CAD-based quantification as well as automated reformatting to enable rapid purification of chemical libraries. This automated workflow is entirely solution-based, eliminating the need to weigh or handle solids. This increases process efficiency and creates a link between high-throughput synthesis and profiling of novel chemical matter with respect to biological and physicochemical properties in relevant assays. Microscale chemistry ; Workflow ; Automation ; Profiling (computer programming) ; Computer science ; Process engineering ; Throughput ; Stock solution ; Chemistry ; Chromatography ; Database ; Engineering ; Operating system Analytical Chemistry and Chromatography ; Innovative Microfluidic and Catalytic Techniques Innovation ; Microfluidic and Capillary Electrophoresis Applications
Authors: Manzila Islam Tuheen | Wei Sun | Jincheng Du
Source: Journal of the American Ceramic Society (article, 2022-08-05)
Field: Materials Science — Ceramics and Composites

Effect of iron redox ratio on the structures of boroaluminosilicate glasses Abstract Iron oxide is commonly found in natural or industrial glass compositions and can exist as ferrous (Fe 2+ ) or ferric (Fe 3+ ) species, with their ratios depending on glass composition, temperature, pressure and the redox reactions during the glass forming process. The iron redox ratio plays an important role on silicate glass structures and consequently various properties. This work aims to study the effect of iron oxide, and particularly the iron redox ratio, on the structures of borosilicate and boroaluminosilicate glasses using molecular dynamics simulations with newly developed iron potential parameters that are compatible with the borosilicate potentials. The results provide detailed cation coordination states of both iron species and the effect of redox ratio on boron coordination and other structural features. Particularly, competition for charge compensating modifier cations (such as Na + ) among the fourfold‐coordinated cations such as B 3+ , Al 3+ , and Fe 3+ is investigated by calculating the cation–cation pair distribution functions and coordination preferential ratios. The results show that the trivalent ferric ions, with a shorter Fe–O bond distance and better defined first coordiation shell with mainly four‐fold coordination, act as a glass former whereas the divalent ferrous ions mainly play the role of glass modifier. The ferrous/ferric ratio (Fe 2+ /Fe 3+ ) was found to affect the glass chemistry and hence glass properties by regulating the amount of four‐coordinated boron, the fraction of non‐briding oxygen and other features. The results are compared with available experimental data to gain insights of the complex structures and charge compensation schemes of the glass system. Borosilicate glass ; Ferrous ; Redox ; Ferric ; Inorganic chemistry ; Chemistry ; Boron ; Divalent ; Oxide ; Coordination number ; Iron oxide ; Dissolution ; Ion ; Physical chemistry Glass properties and applications ; Luminescence Properties of Advanced Materials ; Pigment Synthesis and Properties
Authors: Yanlin Mi | Yinzhou Yan | Mengyuan Wang | Lixue Yang | Jing He | Yijian Jiang
Source: Nanophotonics (article, 2022-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Cascaded microsphere‐coupled surface‐enhanced Raman spectroscopy (CMS‐SERS) for ultrasensitive trace‐detection Surface-enhanced Raman spectroscopy (SERS) has been widely investigated and employed as a powerful optical analytical technique providing fingerprint vibrational information of molecules with high sensitivity and resolution. In addition to metallic nanostructure, dielectric micro-/nano-structures with extraordinary optical manipulation properties have demonstrated capability in enhanced Raman scattering with ultralow energy losses. Here we report a facile cascaded structure composed of a large microsphere (LMS) and a small microsphere array with Ag nanoparticles as a novel hybrid SERS substrate, for the first time. The cascaded microsphere-coupled SERS substrate provides a platform to increase the molecular concentration, boost the intensity of localized excitation light, and direct the far-field emission, for giant Raman enhancement. It demonstrates the maximum enhancement factor of Raman intensity greater than 10<sup>8</sup> for the limit of detection down to 10<sup>-11</sup> M of 4-nitrothiphenol molecules in aqueous solution. The present work inspires a novel strategy to fabricate cascaded dielectric/metallic micro-/nano-structures superior to traditional SERS substrates towards practical applications in cost-effective and ultrahigh-sensitive trace-detection. Raman spectroscopy ; Materials science ; Raman scattering ; Surface-enhanced Raman spectroscopy ; Substrate (aquarium) ; Nanotechnology ; Nanostructure ; Nanoparticle ; Detection limit ; Dielectric ; Optoelectronics ; Optics ; Chemistry Gold and Silver Nanoparticles Synthesis and Applications ; Near-Field Optical Microscopy ; Plasmonic and Surface Plasmon Research
Authors: Maurice Retout | Zhicheng Jin | Jason Tsujimoto | Yash Mantri | Raina M. Borum | Matthew N. Creyer | Wonjun Yim | Tengyu He | Yu‐Ci Chang | Jesse V. Jokerst
Source: ACS Applied Materials & Interfaces (article, 2022-11-08)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Di-Arginine Additives for Dissociation of Gold Nanoparticle Aggregates: A Matrix-Insensitive Approach with Applications in Protease Detection We report the reversible aggregation of gold nanoparticles (AuNPs) assemblies via a di-arginine peptide additive and thiolated PEGs (HS-PEGs). The AuNPs were first aggregated by attractive forces between the citrate-capped surface and the arginine side chains. We found that the HS-PEG thiol group has a higher affinity for the AuNP surface, thus leading to redispersion and colloidal stability. In turn, there was a robust and obvious color change due to on/off plasmonic coupling. The assemblies' dissociation was directly related to the HS-PEG structural properties such as their size or charge. As an example, HS-PEGs with a molecular weight below 1 kDa could dissociate 100% of the assemblies and restore the exact optical properties of the initial AuNP suspension (prior to the assembly). Surprisingly, the dissociation capacity of HS-PEGs was not affected by the composition of the operating medium and could be performed in complex matrices such as plasma, saliva, bile, urine, cell lysates, or even seawater. The high affinity of thiols for the gold surface encompasses by far the one of endogenous molecules and is thus favored. Moreover, starting with AuNPs already aggregated ensured the absence of a background signal as the dissociation of the assemblies was far from spontaneous. Remarkably, it was possible to dry the AuNP assemblies and solubilize them back with HS-PEGs, improving the colorimetric signal generation. We used this system for protease sensing in biological fluids. Trypsin was chosen as the model enzyme, and highly positively charged peptides were conjugated to HS-PEG molecules as cleavage substrates. The increase of positive charge of the HS-PEG-peptide conjugate quenched the dissociation capacity of the HS-PEG molecules, which could only be restored by the proteolytic cleavage. Picomolar limit of detection was obtained as well as the detection in saliva or urine. Materials science ; Nanoparticle ; Dissociation (chemistry) ; Nanotechnology ; Colloidal gold ; Arginine ; Protease ; Matrix (chemical analysis) ; Combinatorial chemistry ; Enzyme ; Organic chemistry ; Biochemistry ; Chemistry ; Amino acid ; Composite material Gold and Silver Nanoparticles Synthesis and Applications ; Advanced biosensing and bioanalysis techniques ; Nanoparticle-Based Drug Delivery
Authors: Lejun Yu | Lingbo Liu | Wanneng Yang | Dan Wu | Jinhu Wang | Qiang He | ZhouShuai Chen | Qian Liu
Source: Frontiers in Plant Science (article, 2022-12-06)
Field: Chemistry — Inorganic Chemistry

A non-destructive coconut fruit and seed traits extraction method based on Micro-CT and deeplabV3+ model With the completion of the coconut gene map and the gradual improvement of related molecular biology tools, molecular marker-assisted breeding of coconut has become the next focus of coconut breeding, and accurate coconut phenotypic traits measurement will provide technical support for screening and identifying the correspondence between genotype and phenotype. A Micro-CT system was developed to measure coconut fruits and seeds automatically and nondestructively to acquire the 3D model and phenotyping traits. A deeplabv3+ model with an Xception backbone was used to segment the sectional image of coconut fruits and seeds automatically. Compared with the structural-light system measurement, the mean absolute percentage error of the fruit volume and surface area measurements by the Micro-CT system was 1.87% and 2.24%, respectively, and the squares of the correlation coefficients were 0.977 and 0.964, respectively. In addition, compared with the manual measurements, the mean absolute percentage error of the automatic copra weight and total biomass measurements was 8.85% and 25.19%, respectively, and the adjusted squares of the correlation coefficients were 0.922 and 0.721, respectively. The Micro-CT system can nondestructively obtain up to 21 agronomic traits and 57 digital traits precisely. Copra ; Biomass (ecology) ; Partial least squares regression ; Biology ; Horticulture ; Biological system ; Mathematics ; Food science ; Statistics ; Agronomy Coconut Research and Applications ; Spectroscopy and Chemometric Analyses