jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Amin Mahmood Thawabteh | Aseel Wasel Ghanem | Sara AbuMadi | Dania Thaher | Weam Jaghama | Rafik Karaman | Laura Scrano | Sabino Aurelio Bufo
Source: Toxins (review, 2024-11-12)
Field: Chemistry — Organic Chemistry

Antibacterial Activity and Antifungal Activity of Monomeric Alkaloids Scientists are becoming alarmed by the rise in drug-resistant bacterial and fungal strains, which makes it more costly, time-consuming, and difficult to create new antimicrobials from unique chemical entities. Chemicals with pharmacological qualities, such as antibacterial and antifungal elements, can be found in plants. Alkaloids are a class of chemical compounds found in nature that mostly consist of basic nitrogen atoms. Biomedical science relies heavily on alkaloid compounds. Based on 241 papers published in peer-reviewed scientific publications within the last ten years (2014-2024), we examined 248 natural or synthesized monomeric alkaloids that have antifungal and antibacterial activity against Gram-positive and Gram-negative microorganisms. Based on their chemical structure, the chosen alkaloids were divided into four groups: polyamine alkaloids, alkaloids with nitrogen in the side chain, alkaloids with nitrogen heterocycles, and pseudoalkaloids. With MIC values of less than 1 µg/mL, compounds <b>91</b>, <b>124</b>, <b>125</b>, <b>136</b>-<b>138</b>, <b>163</b>, <b>164</b>, <b>191, 193</b>, <b>195</b>, <b>205</b> and <b>206</b> shown strong antibacterial activity. However, with MIC values of below 1 µg/mL, compounds <b>124</b>, <b>125</b>, <b>163</b>, <b>164</b>, <b>207</b>, and <b>224</b> demonstrated strong antifungal activity. Given the rise in antibiotic resistance, these alkaloids are highly significant in regard to their potential to create novel antimicrobial drugs. Antimicrobial ; Antifungal ; Alkaloid ; Antibacterial activity ; Chemistry ; Biology ; Traditional medicine ; Bacteria ; Microbiology ; Stereochemistry ; Organic chemistry ; Medicine Chemical synthesis and alkaloids ; Phenothiazines and Benzothiazines Synthesis and Activities ; Botanical Research and Chemistry
Authors: Rumi Acharya | Tejal V. Patil | Sayan Deb Dutta | Jieun Lee | Keya Ganguly | Hojin Kim | Aayushi Randhawa | Ki‐Taek Lim
Source: Advanced Materials Technologies (article, 2024-05-16)
Field: Materials Science — Materials Chemistry

Single‐Walled Carbon Nanotube‐Based Optical Nano/Biosensors for Biomedical Applications: Role in Bioimaging, Disease Diagnosis, and Biomarkers Detection Abstract The convergence of advanced nanotechnology with disease diagnosis has ushered in a transformative era in healthcare, empowering early and accurate detection of diseases and paving the way for timely interventions, improved treatment outcomes, and enhanced patient well‐being. The development of novel materials is frequently the impetus behind significant advancements in sensor technology. Among them, single‐walled carbon nanotubes (SWCNTSs) have emerged as promising nanomaterials for developing biosensors. Their unique optical, electrical, and biocompatibility properties make them promising candidates for enhancing the sensitivity and real‐time monitoring capabilities of biosensors, as well as for enabling various bioimaging techniques. Recent studies have demonstrated the utility of SWCNTS‐based biosensors in the real‐time monitoring of biological analytes, such as nitric oxide and hydrogen peroxide (H 2 O 2 ), with potential implications for disease understanding and therapeutic response assessment. Moreover, SWCNTSs have shown promise in bioimaging applications, including fluorescence, Raman spectroscopy, and photoluminescence imaging of biological samples. This article delves into the core principles, design strategies, and operational mechanisms that underpin SWCNTS‐bioimaging techniques‐based biosensors. It emphasizes on their unique properties and versatile functionalization of carbon nanotubes, laying the foundation for their integration into biosensor platforms and applications aimed at diagnosing a wide spectrum of diseases including infectious diseases, cancer, neurological disorders, and metabolic conditions. Carbon nanotube ; Nanotechnology ; Biosensor ; Nano- ; Materials science ; Nanosensor ; Medicine Carbon Nanotubes in Composites ; Neuroscience and Neural Engineering ; Electrochemical sensors and biosensors
Authors: L. Natrayan | Fuád Ameén | Neelima Devi Chinta | Nalla Bhanu Teja | G. Muthu | S. Kaliappan | Saheb Ali | Ashiwin Vadiveloo
Source: Green Processing and Synthesis (article, 2024-01-01)
Field: Materials Science — Polymers and Plastics

Antibacterial and dynamical behaviour of silicon nanoparticles influenced sustainable waste flax fibre-reinforced epoxy composite for biomedical application Abstract This article explores the impact of nano-silica on the properties of woven flax fibre/epoxy composites. Using compression moulding, epoxy/flax/silica hybrid nanocomposites were produced. The nano-silica was dispersed in the epoxy matrix via ultrasonication at various weight ratios. A series of tests, including crack durability, dynamic mechanical analysis, and scanning electron microscopy, were conducted to evaluate the modified materials. Notably, a 3% nano-silica filler load resulted in a 54% and 57% improvement in initiation and transmission interfacial fracture toughness, respectively. Scanning electron microscope imaging confirmed that fibres pull out at the crack tip during initial debonding, accounting for the increased toughness. Dynamic mechanical analysis further revealed enhancements in mechanical properties. Moreover, the 3% nano-silica content led to less fibre pull-out, suggesting higher heat resistance than standard flax/epoxy composites. The material also demonstrated promising antimicrobial efficacy against gram-positive and gram-negative bacteria, offering a potential alternative to conventional antibiotics. Materials science ; Epoxy ; Composite material ; Scanning electron microscope ; Toughness ; Composite number ; Nanocomposite ; Fracture toughness ; Sonication ; Durability ; Chemical engineering Natural Fiber Reinforced Composites ; Tribology and Wear Analysis ; Electrospun Nanofibers in Biomedical Applications
Authors: Yue Wu | Ji Chen | Yin Wang | Zhongyi Yuan | Chunyu Huang | Jiacheng Sun | Chengyi Feng | Muyang Li | Kai Qiu | Shining Zhu | Zaichen Zhang | Tao Li
Source: Nature Communications (article, 2024-09-05)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Tbps wide-field parallel optical wireless communications based on a metasurface beam splitter Abstract Optical wireless communication (OWC) stands out as one of the most promising technologies in the sixth-generation (6G) mobile networks. The establishment of high-quality optical links between transmitters and receivers plays a crucial role in OWC performances. Here, by a compact beam splitter composed of a metasurface and a fiber array, we proposed a wide-angle (~120°) OWC optical link scheme that can parallelly support up to 144 communication users. Utilizing high-speed optical module sources and wavelength division multiplexing technique, we demonstrated each user can achieve a communication speed of 200 Gbps which enables the entire system to support ultra-high communication capacity exceeding 28 Tbps. Furthermore, utilizing the metasurface polarization multiplexing, we implemented a full range wide-angle OWC without blind area nor crosstalk among users. Our OWC scheme simultaneously possesses the advantages of high-speed, wide communication area and multi-user parallel communications, paving the way for revolutionary high-performance OWC in the future. Computer science ; Multiplexing ; Crosstalk ; Splitter ; Optical communication ; Wireless ; Optical wireless ; Free-space optical communication ; Beam splitter ; Wavelength-division multiplexing ; Electronic engineering ; Telecommunications ; Optics ; Engineering ; Wavelength ; Physics Metamaterials and Metasurfaces Applications ; Optical Wireless Communication Technologies ; Advanced Antenna and Metasurface Technologies
Authors: Guangxiang Si | Yue Du | Peng Tang | Gao Ma | Zhaochen Jia | Xiaoyue Zhou | Dan Mu | Shen Yan | Yi Lu | Yu Mao | Chuan Chen | Yan Li | Ning Gu
Source: National Science Review (article, 2024-02-07)
Field: Materials Science — Materials Chemistry

Unveiling the next generation of MRI contrast agents: current insights and perspectives on ferumoxytol-enhanced MRI Contrast-enhanced magnetic resonance imaging (CE-MRI) is a pivotal tool for global disease diagnosis and management. Since its clinical availability in 2009, the off-label use of ferumoxytol for ferumoxytol-enhanced MRI (FE-MRI) has significantly reshaped CE-MRI practices. Unlike MRI that is enhanced by gadolinium-based contrast agents, FE-MRI offers advantages such as reduced contrast agent dosage, extended imaging windows, no nephrotoxicity, higher MRI time efficiency and the capability for molecular imaging. As a leading superparamagnetic iron oxide contrast agent, ferumoxytol is heralded as the next generation of contrast agents. This review delineates the pivotal clinical applications and inherent technical superiority of FE-MRI, providing an avant-garde medical-engineering interdisciplinary lens, thus bridging the gap between clinical demands and engineering innovations. Concurrently, we spotlight the emerging imaging themes and new technical breakthroughs. Lastly, we share our own insights on the potential trajectory of FE-MRI, shedding light on its future within the medical imaging realm. Ferumoxytol ; Contrast (vision) ; Current (fluid) ; Nuclear magnetic resonance ; Magnetic resonance imaging ; Medicine ; Medical physics ; Radiology ; Physics ; Optics Lanthanide and Transition Metal Complexes ; Advanced MRI Techniques and Applications ; MRI in cancer diagnosis
Authors: Mushfeqa Iqfath | Syeda Nazifa Wali | Sara Amer | Emerson Hernly | Julia Laskin
Source: ACS Measurement Science Au (review, 2024-08-21)
Field: Chemistry — Spectroscopy

Nanospray Desorption Electrospray Ionization Mass Spectrometry Imaging (nano-DESI MSI): A Tutorial Review Nanospray desorption electrospray ionization (nano-DESI) is a liquid-based ambient mass spectrometry imaging (MSI) technique that enables visualization of analyte distributions in biological samples down to cellular-level spatial resolution. Since its inception, significant advancements have been made to the nano-DESI experimental platform to facilitate molecular imaging with high throughput, deep molecular coverage, and spatial resolution better than 10 μm. The molecular selectivity of nano-DESI MSI has been enhanced using new data acquisition strategies, the development of separation and online derivatization approaches for isobar separation and isomer-selective imaging, and the optimization of the working solvent composition to improve analyte extraction and ionization efficiency. Furthermore, nano-DESI MSI research has underscored the importance of matrix effects and established normalization methods for accurately measuring concentration gradients in complex biological samples. This tutorial offers a comprehensive guide to nano-DESI experiments, detailing fundamental principles and data acquisition and processing methods and discussing essential operational parameters. Desorption electrospray ionization ; Mass spectrometry ; Analyte ; Mass spectrometry imaging ; Chemistry ; Ionization ; Direct electron ionization liquid chromatography–mass spectrometry interface ; Nano- ; Electrospray ionization ; Analytical Chemistry (journal) ; Nanotechnology ; Materials science ; Chromatography ; Chemical ionization Mass Spectrometry Techniques and Applications ; Analytical chemistry methods development ; Advanced Chemical Sensor Technologies
Authors: Sheng Wu | Binli Xiao | Dongliang Jiang | Yao Xiao | Peishan Shao | Zhiyao Zhou | Yinzhen Wang | Puxian Xiong
Source: Small (article, 2024-03-07)
Field: Materials Science — Materials Chemistry

Realizing Near Infrared Mechanoluminescence Switch in LAGO:Cr Based on Oxygen Vacancy Mechanoluminescence (ML) materials are featured with the characteristic of "force to light" in response to external stimuli, which have made great progress in artificial intelligence and optical sensing. However, how to effectively enable ML in the material is a daunting challenge. Here, a Lu<sub>3</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub>:Cr<sup>3+</sup> (LAGO: Cr<sup>3+</sup>) near infrared (NIR) ML material peaked at 706 nm is reported, which successfully realizes the key to unlock ML by the lattice-engineering strategy Ga<sup>3+</sup> substitution for Al<sup>3+</sup> to "grow" oxygen vacancy (O<sub>v</sub>) defects. Combined with thermoluminescence measurements, the observed ML is due to the formation of defect levels and the ML intensity is proportional to it. It is confirmed by X-ray photoelectron spectroscopy and electron paramagnetic resonance that such a process is dominated by O<sub>v</sub>, which plays a crucial role in turning on ML in this compound. In addition, potential ML emissions from <sup>4</sup>T<sub>2</sub> and <sup>2</sup>E level transitions are discussed from both experimental and theoretical aspects. This study reveals the mechanism of the change in ML behavior after cation substitution, and it may have important implications for the practical application of O<sub>v</sub> defect-regulated turn-on of ML. Mechanoluminescence ; Thermoluminescence ; Materials science ; X-ray photoelectron spectroscopy ; Vacancy defect ; Oxygen ; Electron paramagnetic resonance ; Infrared ; Paramagnetism ; Analytical Chemistry (journal) ; Phosphor ; Optoelectronics ; Chemistry ; Nuclear magnetic resonance ; Crystallography ; Optics ; Condensed matter physics ; Physics ; Environmental chemistry ; Luminescence Luminescence Properties of Advanced Materials ; Ga2O3 and related materials ; ZnO doping and properties
Authors: Brittany C. Haas | Ngiap‐Kie Lim | Janis Jermaks | Eden Gaster | Melody C. Guo | Thomas C. Malig | Jacob Werth | Haiming Zhang | F. Dean Toste | Francis Gosselin | Scott J. Miller | Matthew S. Sigman
Source: Journal of the American Chemical Society (article, 2024-03-13)
Field: Chemistry — Organic Chemistry

Enantioselective Sulfonimidamide Acylation via a Cinchona Alkaloid-Catalyzed Desymmetrization: Scope, Data Science, and Mechanistic Investigation Methods to access chiral sulfur(VI) pharmacophores are of interest in medicinal and synthetic chemistry. We report the desymmetrization of unprotected sulfonimidamides via asymmetric acylation with a cinchona-phosphinate catalyst. The desired products are formed in excellent yield and enantioselectivity with no observed bis-acylation. A data-science-driven approach to substrate scope evaluation was coupled to high throughput experimentation (HTE) to facilitate statistical modeling in order to inform mechanistic studies. Reaction kinetics, catalyst structural studies, and density functional theory (DFT) transition state analysis elucidated the turnover-limiting step to be the collapse of the tetrahedral intermediate and provided key insights into the catalyst-substrate structure-activity relationships responsible for the origin of the enantioselectivity. This study offers a reliable method for accessing enantioenriched sulfonimidamides to propel their application as pharmacophores and serves as an example of the mechanistic insight that can be gleaned from integrating data science and traditional physical organic techniques. Desymmetrization ; Chemistry ; Enantioselective synthesis ; Acylation ; Pharmacophore ; Organocatalysis ; Kinetic resolution ; Catalysis ; Combinatorial chemistry ; Cinchona Alkaloids ; Cinchona ; Phosphinate ; Organic chemistry ; Computational chemistry ; Stereochemistry Synthesis and Catalytic Reactions ; Asymmetric Hydrogenation and Catalysis ; Advanced Synthetic Organic Chemistry
Authors: Haozong Zhong | Yong Zheng | Jiacheng Sun | Zhizhang Wang | Rongbo Wu | Ling‐en Zhang | Youting Liang | Qinyi Hua | Minghao Ning | Jitao Ji | Bin Fang | Lin Li | Li Tao | Ya Cheng | Shining Zhu
Source: Advanced Photonics (article, 2024-02-02)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Gigahertz-rate-switchable wavefront shaping through integration of metasurfaces with photonic integrated circuit Achieving spatiotemporal control of light at high speeds presents immense possibilities for various applications in communication, computation, metrology, and sensing. The integration of subwavelength metasurfaces and optical waveguides offers a promising approach to manipulate light across multiple degrees of freedom at high speed in compact photonic integrated circuit (PIC) devices. Here, we demonstrate a gigahertz-rate-switchable wavefront shaping by integrating metasurface, lithium niobate on insulator photonic waveguides, and electrodes within a PIC device. As proofs of concept, we showcase the generation of a focus beam with reconfigurable arbitrary polarizations, switchable focusing with lateral focal positions and focal length, orbital angular momentum light beams as well as Bessel beams. Our measurements indicate modulation speeds of up to the gigahertz rate. This integrated platform offers a versatile and efficient means of controlling the light field at high speed within a compact system, paving the way for potential applications in optical communication, computation, sensing, and imaging. Wavefront ; Photonics ; Photonic integrated circuit ; Integrated optics ; Optoelectronics ; Optics ; Computer science ; Materials science ; Electronic engineering ; Physics ; Engineering Metamaterials and Metasurfaces Applications ; Advanced Optical Imaging Technologies ; Orbital Angular Momentum in Optics
Authors: Lixin Song | Guobin Liu | Zhenping Qu
Source: Applied Catalysis B: Environmental (article, 2024-10-22)
Field: Materials Science — Materials Chemistry

Cation rearrangement at tetrahedral sites in the Cu/ZnAl2O4 spinel enhancing CO2 hydrogenation to methanol Spinel ; Methanol ; Tetrahedron ; Chemistry ; Catalysis ; Materials science ; Crystallography ; Organic chemistry ; Metallurgy Catalytic Processes in Materials Science ; Catalysts for Methane Reforming ; Catalysis and Oxidation Reactions
Authors: Lukáš Zdražil | Alejandro Cadranel | Miroslav Medveď | Michal Otyepka | Radek Zbořil | Dirk M. Guldi
Source: Chem (article, 2024-08-19)
Field: Materials Science — Materials Chemistry

Designing carbon dots for enhanced photo-catalysis: Challenges and opportunities Nanotechnology ; Carbon fibers ; Carbon Nanoparticles ; Photocatalysis ; Catalysis ; Materials science ; Nanoparticle ; Chemistry ; Composite number ; Organic chemistry ; Composite material Carbon and Quantum Dots Applications ; Advanced Photocatalysis Techniques ; Nanocluster Synthesis and Applications
Authors: Yu Liu | Yawen Shi | Hua Wang | Shengbo Zhang
Source: Nano Research (article, 2024-03-07)
Field: Materials Science — Materials Chemistry

Donor–acceptor covalent organic frameworks-confined ultrafine bimetallic Pt-based nanoclusters for enhanced photocatalytic H2 generation Photocatalytic hydrogen generation from hydrogen storage media is an effective and promising approach for the green hydrogen industry as well as for achieving carbon neutrality goals. However, the lower photocatalytic efficiency due to the limited light trapping capacity, low electron transfer rate, and severe aggregation of nanoparticles caused by high surface energy seriously restricts their practical application. Herein, we constructed a series of donor–acceptor (D–A) type covalent organic frameworks to confine ultrafine bimetallic Pt-based nanoclusters for photocatalytic hydrogen generation from ammonia borane (AB) hydrolysis. Under visible light irradiation at 20 °C, PtCo2@covalent organic framework (COF) showed the highest photocatalytic activity with a turnover frequency (TOF) of 486 min−1. Experiments and density functional theory (DFT) calculations reveal that the high catalytic activity is mainly attributed to the strong electronic interactions between D–A type COF and ultrafine PtCo2 nanoclusters. Specifically, the D–A type COF can significantly enhance the light-trapping ability by fine-tuning the electron-acceptor type in the framework, and accelerate the photogenerated electron transfer from D–A type COF to PtCo2 nanocluster, which promotes the adsorption and activation of H2O and AB molecules and accelerates hydrogen release. Furthermore, PtCo2@COF also exhibited ultra-high durability due to the significantly enhanced resistance to nanocluster aggregation caused by the nanopore confinement effect of D–A type COF. We believe that this work will provide a theoretical guide for the rational design of efficient D–A COF-based catalysts for photocatalysis. Nanoclusters ; Bimetallic strip ; Photocatalysis ; Covalent bond ; Acceptor ; Materials science ; Photochemistry ; Nanotechnology ; Chemical engineering ; Chemistry ; Catalysis ; Metal ; Organic chemistry ; Metallurgy ; Physics Covalent Organic Framework Applications ; Advanced Photocatalysis Techniques ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Saniha Ajith | Fares Almomani | Hazim Qiblawey
Source: Journal of environmental chemical engineering (article, 2024-02-01)
Field: Materials Science — Materials Chemistry

Emerging 2D MXene-based polymeric membranes for water treatment and desalination Amidst rapid urbanization and population growth, the global concern over freshwater scarcity is escalating. Addressing this challenge requires a shift toward alternative water treatment technologies. In recent times, there has been a noteworthy surge in the application of innovative 2D nanomaterials MXenes for water treatment. These materials, with chemical formula Mn+1AXn, originating from the precursor MAXene by eliminating the A element, showcasing structural similarities to graphene and other 2D layers. Despite numerous studies incorporating MXenes into polymeric membranes for water desalination and treatment, a comprehensive review of the relevant literature is lacking. This review delves into past and current studies on MXene-based polymeric membranes for water treatment, offering insights into their structure, synthesis, and properties. MXenes, with their substantial surface area, hydrophilic nature, high conductivity, and customizable surface chemistry, hold the potential to revolutionize water filtration. Their incorporation into membranes contributes to increased water flux, enhanced rejection rates for salts and dyes, augmented surface hydrophilicity, and improved overall membrane efficiency. The main mechanisms governing MXene-based polymeric membrane function are size exclusion and the Donnan exclusion. Despite the promise of MXenes, challenges such as complex fabrication methods, instability, and economic concerns persist. Ongoing research focuses on standardized methods, alternative MXene variants, and establishing rigorous benchmarks for large-scale adoption to address these obstacles. Continued research efforts are essential for refining fabrication methods, optimizing membrane composition, and expanding applications to unlock the full potential of MXene-based membranes for sustainable water treatment. MXenes ; Desalination ; Membrane ; Water treatment ; Nanotechnology ; Membrane fouling ; Materials science ; Biochemical engineering ; Fouling ; Environmental engineering ; Environmental science ; Chemistry ; Engineering MXene and MAX Phase Materials ; Membrane Separation Technologies ; Energy Harvesting in Wireless Networks