jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Hongjun Jin | Hongpeng Li | Zhiyang Zhu | Jianbin Huang | Yunlong Xiao | Yun Yan
Source: Angewandte Chemie (article, 2019-10-21)
Field: Materials Science — Materials Chemistry

Hydration‐Facilitated Fine‐Tuning of the AIE Amphiphile Color and Application as Erasable Materials with Hot/Cold Dual Writing Modes Abstract Hydration water greatly impacts the color of inorganic crystals, but it is still unknown whether hydration water can be utilized to systematically manipulate the emission color of organic luminescent groups. Now, metal ions with different hydration ability allow fine‐tuning the emission color of a fluorescent group displaying aggregation induced emission (AIE). Because the hydration water can be removed easily by gentle heating or mechanical grinding and re‐gained by solvent fuming, rewritable materials can be fabricated both in the hot‐writing and cold‐writing modes. This hydration‐facilitated strategy will open up a new vista in fine‐tuning the emission color of AIE molecules based on one synthesis and in the design of smart luminescent devices. Luminescence ; Materials science ; Fluorescence ; Aggregation-induced emission ; Amphiphile ; Solvent ; Molecule ; Structural coloration ; Nanotechnology ; Photochemistry ; Chemical engineering ; Optoelectronics ; Chemistry ; Copolymer ; Optics ; Polymer ; Composite material ; Organic chemistry Luminescence and Fluorescent Materials ; Supramolecular Chemistry and Complexes ; Molecular Sensors and Ion Detection
Authors: Anastasiia Novikova
Source: Nature Reviews Physics (review, 2019-06-20)
Field: Materials Science — Materials Chemistry

Growing twisted nanowires Nanowire ; van der Waals force ; Topology (electrical circuits) ; Materials science ; Crystal (programming language) ; Nanotechnology ; Physics ; Computer science ; Quantum mechanics ; Molecule ; Mathematics ; Combinatorics 2D Materials and Applications ; Graphene research and applications ; nanoparticles nucleation surface interactions
Authors: Rachna Anand | Arun Kumar | Arun Nanda
Source: Drug Delivery Letters (article, 2019-12-18)
Field: Chemistry — Physical and Theoretical Chemistry

Pharmaceutical Co-Crystals - Design, Development and Applications Background: Solubility and dissolution profile are the major factors which directly affect the biological activity of a drug and these factors are governed by the physicochemical properties of the drug. Crystal engineering is a newer and promising approach to improve physicochemical characteristics of a drug without any change in its pharmacological action through a selection of a wide range of easily available crystal formers. Objective: The goal of this review is to summarize the importance of crystal engineering in improving the physicochemical properties of a drug, methods of design, development, and applications of cocrystals along with future trends in research of pharmaceutical co-crystals. Co-crystallization can also be carried out for the molecules which lack ionizable functional groups, unlike salts which require ionizable groups. Conclusion: Co-crystals is an interesting and promising research area amongst pharmaceutical scientists to fine-tune the physicochemical properties of drug materials. Co-crystallization can be a tool to increase the lifecycle of an older drug molecule. Crystal engineering carries the potential of being an advantageous technique than any other approach used in the pharmaceutical industry. Crystal engineering offers a plethora of biopharmaceutical and physicochemical enhancements to a drug molecule without the need of any pharmacological change in the drug. Biopharmaceutical ; Crystal engineering ; Crystallization ; Drug ; Dissolution ; Nanotechnology ; Biochemical engineering ; Solubility ; Materials science ; Crystal (programming language) ; Pharmaceutical sciences ; Drug development ; Active ingredient ; Pharmaceutical formulation ; Molecule ; Combinatorial chemistry ; Chemistry ; Organic chemistry ; Computer science ; Pharmacology ; Engineering ; Medicine ; Biotechnology ; Chromatography Crystallography and molecular interactions ; Crystallization and Solubility Studies ; Chemical Thermodynamics and Molecular Structure
Authors: Timothée Stassin | Steve Waitschat | Niclas Heidenreich | Helge Reinsch | Finn Puschkell | Dmitry E. Kravchenko | Ivo Stassen | Jonas van Dinter | Rhea Verbeke | Marcel Dickmann | Werner Egger | Ivo F.J. Vankelecom | Dirk De Vos | Rob Ameloot | Norbert Stock
Source: ChemRxiv (preprint, 2019-06-24)
Field: Chemistry — Inorganic Chemistry

Aqueous Flow Reactor and Vapour-Assisted Synthesis of Aluminium Dicarboxylate Metal-Organic Frameworks for Use as Water Adsorbents Energy-efficient indoors temperature control can be realised through adsorption chillers or adsorption heat pumps based on the reversible adsorption and desorption of water in porous materials. Stable microporous aluminium-based metal-organic frameworks (MOFs) present promising water sorption properties for this goal. The development of synthesis routes that make use of available and affordable building blocks and avoid the use of organic solvents is crucial to advance this field. In this work, two scalable synthesis routes under mild reaction conditions were developed for aluminium-based MOFs: (1) in aqueous solutions using a continuous flow reactor and (2) through the vapour-assisted conversion of solid precursors. Fumaric acid, its methylated analogue mesaconic acid, as well as mixtures of the two were used as linkers. The synthesis conditions determine the crystal structure (symmetry and topology), either the MIL-53 or MIL-68 type with square-grid or kagome-grid topology, respectively. Fine-tuning resulted in new MOF materials thus far inaccessible through conventional synthesis routes. Furthermore, by varying the linker ratio, the water sorption properties can be continuously adjusted while retaining the sigmoidal isotherm shape advantageous for heat transformation applications. Adsorption ; Materials science ; Microporous material ; Aqueous solution ; Metal-organic framework ; Chemical engineering ; Sorption ; Aluminium ; Topology (electrical circuits) ; Chemistry ; Organic chemistry ; Composite material Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and Cooling Systems ; Covalent Organic Framework Applications
Authors: Hany A. Elazab | M. Radwan | M. A. Sadek | B Baruwati | J Yan | A Hany | Elazab | T Tamer | El-Idreesy | B Ashraf | M Radwan | M Sadek | H | Ali Elazab | B Siamaki | M Frank Gupton | El-Shall | N Samir | H Elazab | T | F Zakaria | R Nasser | M Ghobashy | M Gadallah | T El-Idreesy | Mamdouh Elazab | M Gadall | Sadek | Mohamed Adel Rashad | W Mohsen | R Mankarious | M Shazly | M Marwa | M Naeem | H Sadek | S Elazab | B Moussa | M Gupton | El- | A Moussa | A Elazab | S Siamaki | El | K Moussa | B Brinkley | Samy
Source: International Journal of Innovative Technology and Exploring Engineering (article, 2019-10-10)
Field: Chemistry — Organic Chemistry

Microwave-Assisted Synthesis of Graphene Supported Hexagonal Magnetite for Applications in Catalysis Herein, we report a rapid one-step synthetic method using microwave irradiation for growing magnetite nanocrystals on reduced graphene oxide sheets. This developed strategy allows decorating graphene sheets with magnetite nanocrystals of welldefined morphology as cubes using microwave-driven reduction of iron chloride using hydrazine hydrate as a reducing agent. The size and shape control was achieved via fine-tuning of the reaction conditions. The obtained results demonstrate the applicability of this microwave synthetic approach to control the morphology of the magnetite nanocrystals anchored on graphene sheets. Moreover, graphene sheets will enhance the nucleation and growth of magnetite nanoplates anchored on graphene. This approach can be used as a synthetic tool to synthesize a wide variety of metal and metal oxide architectures on graphene. This approach also provides plenty of advantages like catalyst recyclability, mild reaction conditions, easy separation, reproducibility, and minimization of agglomeration effect that cause the decrease in the catalyst catalytic activity Graphene ; Materials science ; Magnetite ; Nucleation ; Catalysis ; Oxide ; Nanotechnology ; Nanocrystal ; Hydrazine (antidepressant) ; Chemical engineering ; Reducing agent ; Hydrate ; Microwave ; Metal ; Cordierite ; Composite material ; Chemistry ; Metallurgy ; Organic chemistry ; Ceramic ; Computer science Nanomaterials for catalytic reactions ; Graphene research and applications ; Magnetic Properties and Synthesis of Ferrites
Authors: А. А. Семянникова | V. Yu. Irkhin | П. Б. Терентьев | Yu. A. Perevozchikova | P. S. Korenistov | A. F. Prekul | Е. Б. Марченкова | M. Eisterer | В. В. Марченков
Source: Journal of Physics Conference Series (article, 2019-11-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Electrical, magnetic and galvanomagnetic properties of Mn-based Heusler alloys Abstract Half-metallic ferromagnets and spin gapless semiconductors are promising materials for spintronic devices since a high degree of the spin polarization of charge carriers can be realized in such materials. Spin gapless semiconductors make it possible to combine the properties of half-metallic ferromagnets with semiconductor characteristics and to perform fine tuning of the energy gap value. The Mn 2 Me Al ( Me = Ti, V, Cr, Mn, Fe, Co, Ni) Heusler alloys can possess such features. We studied the electrical, magnetic and galvanomagnetic properties of the Mn 2 Me Al ( Me = Ti, V, Cr, Mn, Fe, Co, Ni) Heusler alloys from 4.2 K to 900 K and in magnetic fields up to 100 kOe. The features in the electronic and magnetic properties of Mn 2 MeAl Heusler alloys were observed, which can be a manifestation of the electronic energy spectrum peculiarities with occurrence of the half-metallic ferromagnet and/or spin gapless semiconductor states. Condensed matter physics ; Gapless playback ; Spintronics ; Ferromagnetism ; Materials science ; Semiconductor ; Spin polarization ; Magnetic semiconductor ; Band gap ; Half-metal ; Spin (aerodynamics) ; Physics ; Optoelectronics ; Electron Heusler alloys: electronic and magnetic properties ; MXene and MAX Phase Materials ; Advanced Welding Techniques Analysis
Authors: Luuk R.M. Versteegden | Marije Sloff | Henk R. Hoogenkamp | Michiel W. Pot | Jeffrey Pang | Theo Hafmans | Thijs de Jong | Theo H. Smit | Sander C.G. Leeuwenburgh | Egbert Oosterwijk | Wout Feitz | Willeke F. Daamen | Toin H. Van Kuppevelt
Source: RSC Advances (article, 2019-01-01)
Field: Materials Science — Biomaterials

A salt-based method to adapt stiffness and biodegradability of porous collagen scaffolds Type I collagen scaffolds for tissue reconstruction often have impaired mechanical characteristics such as limited stiffness and lack of strength. In this study, a new technique is presented to fine-tune stiffness and biodegradability of collagen scaffolds by treatment with concentrated salt solutions. Collagen scaffolds were prepared by a casting, freezing and lyophilization process. Scaffolds were treated with 90% saturated salt solutions, the salts taken from the Hofmeister series, followed by chemical crosslinking. Treatment with salts consisting of a divalent cation in combination with a monovalent anion, <i>e.g.</i> CaCl<sub>2</sub>, resulted in fast shrinkage of the scaffolds up to approximately 10% of the original surface area. Effective salts were mostly at the chaotropic end of the Hofmeister series. Shrunken scaffolds were more than 10 times stiffer than non-shrunken control scaffolds, and displayed reduced pore sizes and swollen, less organized collagen fibrils. The effect could be pinpointed to the level of individual collagen molecules and indicates the shrinking effect to be driven by disruption of stabilizing hydrogen bonds within the triple helix. No calcium deposits remained in CaCl<sub>2</sub> treated scaffolds. Subcutaneous implantation in rats showed similar biocompatibility compared to H<sub>2</sub>O and NaCl treated scaffolds, but reduced cellular influx and increased structural integrity without signs of major degradation after 3 months. In conclusion, high concentrations of chaotropic salts can be used to adjust the mechanical characteristics of collagen scaffolds without affecting biocompatibility. This technique may be used in regenerative medicine to stiffen collagen scaffolds to better comply with the surrounding tissues, but may also be applied for <i>e.g.</i> slow release drug delivery systems. Chaotropic agent ; Biocompatibility ; Hofmeister series ; Chemistry ; Salt (chemistry) ; Biodegradation ; Shrinkage ; Stiffness ; Chemical engineering ; Biomedical engineering ; Tissue engineering ; Biopolymer ; Biophysics ; Materials science ; Composite material ; Biochemistry ; Organic chemistry ; Polymer Collagen: Extraction and Characterization ; Bone Tissue Engineering Materials ; Silk-based biomaterials and applications
Authors: Honggang Huang | Lylia Drici | Pernille S. Lassen | Giuseppe Palmisano | Martin R. Larsen
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2019-01-02)
Field: Chemistry — Spectroscopy

Simultaneous proteomics and three PTMomics characterization of pro-inflammatory cytokines stimulated INS-1E cells using TiO <sub>2</sub> enrichment strategy Abstract Diverse protein post-translational modifications (PTMs) in proteins form complex combinatorial patterns to regulate the protein function and biological processes in a fine-tuning manner. Reversible phosphorylation, cysteines (Cys) modification, and N-linked glycosylation are essentially involved in cellular signaling pathways of pro-inflammatory cytokines, which can induce beta cell death and diabetes. Here we developed a novel mass spectrometry–based proteomic strategy (termed TiCPG) for the simultaneous comprehensive characterization of the proteome and three post-translational modifications (PTMomes) by applying TiO 2 enrichment of peptides with reversibly modified Cysteine (rmCys), Phosphorylation, and sialylated N-linked (SAN-) Glycosylation from low amount of sample material with largely minimized sample loss. We applied this TiCPG strategy to quantitatively study the change of the three PTMs in β-cell-like INS-1E cells subject to pro-inflammatory cytokines stimulation. It enabled efficient enrichment and quantitative analysis of 8346 rmCys sites, 10321 phosphosites and 1906 SAN-glycosylation sites from 5853 proteins. Significant regulation was found on 100 proteins at the total protein level, while much higher degree of regulation was identified on 3025 peptides with PTMs from 1490 proteins. The three PTMs were co-regulated in proteins, but demonstrated differential spatial and temporal patterns related to protein cellular localization and function in the time course of cytokines stimulation, and they were extensively involved in essential signaling pathways related to pro-inflammatory cytokine mediated β-cell apoptosis, such as the inducible NO synthase (NOS2) signaling pathway, Overall, the TiCPG strategy is proved as a straight forward and powerful tool for multiple PTMomics studies. Proteome ; Glycosylation ; Proteomics ; Phosphorylation ; Chemistry ; Cell biology ; Signal transduction ; Quantitative proteomics ; Function (biology) ; Cysteine ; Posttranslational modification ; Cytokine ; Biochemistry ; Biology ; Enzyme ; Immunology Advanced Proteomics Techniques and Applications ; Peptidase Inhibition and Analysis ; Protease and Inhibitor Mechanisms
Authors: Christos Bolakis | Irene S. Karanasiou | Dragoslav Grbovic | Christos N. Vazouras | Gamani Karunasiri | N.K. Uzunoglu
Source: International journal of electromagnetics and applications (article, 2019-01-01)
Field: Materials Science — Polymers and Plastics

Optimizing the Absorption Capability of a Microbolometer Pixel’s Active Element In this paper, we propose a new approach for effective detection of THz and IR radiation, using a configuration of a thin metal and semiconductor layers. We present the design and performance of an effective absorber of radiation that can be used as the active pixel element of a microbolometer. A double-layered absorber, comprising a thin metal layer placed onto a poly-Si substrate was designed through a fine-tuning process. The results indicate that the proposed low-cost, double-layered absorber can be tuned based on the metal layer sheet resistance and the thickness of various poly-Si media. This can be done in a way that takes advantage of the diversity of the absorption of the metal films over the THz spectrum (0.1 - 10 THz) and both the mid and long wavelength IR region (3 - 14μm). A ‘’wide-spectrum linear equation’’ has been developed, having as input any discrete wavelength with desired absorption peak in the THz or IR spectrum and as output the appropriate thickness of the poly-Si medium. It was found, using this equation, that the composite absorber retains the ability to absorb 96% and reflects less than 1% of the incident power of radiation. Moreover, based on the fact that both layers of the absorber can be used as active element of a microbolometer pixel, a ‘’hybrid’’ nature of the designed absorber emerges. To this end, we compare important metrics and design complexity between the ‘’hybrid’’ absorber and a state-of-the-art microbolometric pixel element comprised either of a thin metal layer or a material with high TCR. The analysis shows that the developed absorber can be considered a promising candidate for integration into current and sophisticated microbolometer configurations. Microbolometer ; Materials science ; Optoelectronics ; Terahertz radiation ; Pixel ; Absorption (acoustics) ; Wavelength ; Radiation ; Optics ; Substrate (aquarium) ; Composite material ; Bolometer ; Physics ; Detector Transition Metal Oxide Nanomaterials ; Advanced Thermoelectric Materials and Devices ; Thermal Radiation and Cooling Technologies
Authors: Lewis E. Johnson | Jason S. Kingsbury | Delwin L. Elder | Rose Ann Cattolico | Luke N. Latimer | William R. Hardin | Evelien De Meulenaere | Chloe R. Deodato | Griet Depotter | Sowmya Madabushi | Nicholas Bigelow | Brittany A. Smolarski | Trevor K. Hougen | Werner Kaminsky | Koen Clays | Bruce H. Robinson
Source: Organic & Biomolecular Chemistry (article, 2019-01-01)
Field: Materials Science — Materials Chemistry

DANPY (dimethylaminonaphthylpyridinium): an economical and biocompatible fluorophore Dyes with nonlinear optical (NLO) properties enable new imaging techniques and photonic systems. We have developed a dye (DANPY-1) for photonics applications in biological substrates such as nucleic acids; however, the design specification also enables it to be used for visualizing biomolecules. It is a prototype dye demonstrating a water-soluble, NLO-active fluorophore with high photostability, a large Stokes shift, and a favorable toxicity profile. A practical and scalable synthetic route to DANPY salts has been optimized featuring: (1) convergent Pd-catalyzed Suzuki coupling with pyridine 4-boronic acid, (2) site-selective pyridyl N-methylation, and (3) direct recovery of crystalline intermediates without chromatography. We characterize the optical properties, biocompatibility, and biological staining behavior of DANPY-1. In addition to stability and solubility across a range of polar media, the DANPY-1 chromophore shows a first hyperpolarizability similar to common NLO dyes such as Disperse Red 1 and DAST, a large two-photon absorption cross section for its size, substantial affinity to nucleic acids in vitro, an ability to stain a variety of cellular components, and strong sensitivity of its fluorescence properties to its dielectric environment. Biophotonics ; Fluorophore ; Biocompatible material ; Fluorescence ; Nanotechnology ; Materials science ; Chemistry ; Biomedical engineering ; Optics ; Physics ; Optoelectronics ; Engineering ; Photonics Luminescence and Fluorescent Materials ; Nanoplatforms for cancer theranostics ; Molecular Sensors and Ion Detection
Authors: Buddhika Keerawelle | Adikari Chamara | Gobika Thiripuranathar | S Ahmed | M Ahmad | B Swami | S Ikram | A Syafiuddin | M Salmiati | A Salim | T Hong Kueh | H Hadibarata | Nur | S Anwar | X Zhang | Z Liu | W Shen | S Gurunathan | S Prabhu | E Poulose | M Saifullah | B Ahmad | S Swami | Ikram | C Sudhakar | K Selvam | M Govarthanan | B Senthilkumar | A Sengottaiyan | M Stalin | T Selvankumar | S Srikar | D Giri | D Pal | P Mishra | S Upadhyay | V Mishra | R Sharma | N Jasuja | D Guptha | H Dargo | A Ayaliew | H Kassa | J Paul | B Selvi | N Karmegam | S Gogoi | D Sharma | S Kanchi | K Bisetty | J Garca-Barrasa | J Lpez-De-Luzuriaga | M Monge | N Savithramma | S Ankanna | G Bhumi | N Leys | R Van Houdt | S Silver | J Mahillon | K Mijnendonckx | J Alexander | K Gudikandula | S Maringanti | V Kumar | S Yadav | S Raja | V Ramesh | V Thivaharan | K Vijayaraghavan | S Nalini | N Prakash | D Madhankumar | K Parveen | V Banse | L Ledwani | S Vishwajeet | S Ankita | W Nitin | R Mariselvam | A Ranjitsingh | A Usha Raja Nanthini | K Kalirajan | C Padmalatha | P Selvakumar | V Annavaram | V Posa | V Uppara | S Jorepalli | A Somala | K Saware | B Sawle | B Salimath | K Jayanthi | V Abbaraju | M Sathishkumar | K Sneha | Y Yun | S Dubey
Source: Journal of Chemical Biological and Physical Sciences (review, 2019-10-30)
Field: Materials Science — Materials Chemistry

A review on plant mediated synthesis of silver nanoparticles and their antimicrobial activity against various pathogenic bacteria Nanotechnology introduced the concept of nanoparticles, which exhibit unique and remarkably different properties from their bulk materials. Chemical methods are widely used among various strategies of synthesizing nanoparticles. Green synthesis is utilized as a cost effective and environmentally friendly alternative to the chemical method of synthesizing nanoparticles. Plant mediated synthesis of the nanoparticles is recognized as most promising green synthesis method and researchers have paid closer attention to the green synthesis of silver nanoparticles due to their remarkable antimicrobial activity. The review focus on the recent studies and present the methodology used in bio-reduction of silver nitrate solution using plant extracts, methods used in characterization of synthesized nanoparticles, various antibacterial assays conducted and also giving a brief overview of the results obtained from them. Antimicrobial ; Pathogenic bacteria ; Bacteria ; Microbiology ; Silver nanoparticle ; Chemistry ; Nanotechnology ; Nanoparticle ; Biology ; Materials science Nanoparticles: synthesis and applications