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421 results for “Polymer”
Data for: Preceramic polymer assisted nucleation and growth of copper sulfide nanoplates
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Supporting Data for "Ionic and Nonspherical Polymer Nanoparticles in Nonpolar Solvents" (Macromolecules, doi: 10.1021/acs.macromol.0c00121)
<p>All data are named with the monomer composition of the block copolymer (SMA, BzMA, or MOTMA) and the type of data (SAXS, DLS, or TEM).</p> <p>Small-angle X-ray scattering (SAXS) reciprocal space scattering data [Q in 1/Å, I(Q) in arb. unit, uncertainty I(Q)]</p> <p>Dynamic-light scattering (DLS) intensity-weighted size distributions [Bin location in nm, Proportion in %]</p> <p>Transmission electron microscopy (TEM) micrographs [Scale bars are all 200 nm]</p>
Data from R. C. Schofield et al., "Polymer-encapsulated organic nanocrystals for single photon emission" Opt. Mater. Express 10, 1586-1596 (2020).
<p>Raw data files to accompany R. C. Schofield et al., "Polymer-encapsulated organic nanocrystals for single photon emission" Opt. Mater. Express <strong>10</strong>, 1586-1596 (2020), and a Mathematica notebook which can be used to import the data files.</p> <p> </p>
Data for article "Tracking Charge Transfer to Residual Metal Clusters in Conjugated Polymers for Photocatalytic Hydrogen Evolution"
<p>Data presented in the publication "Tracking Charge Transfer to Residual Metal Clusters in Conjugated Polymers for Photocatalytic Hydrogen Evolution", published in the Journal of the American Chemical Society. The published article is available at <a href="https://doi.org/10.1021/jacs.0c06104">https://doi.org/10.1021/jacs.0c06104</a></p>
A Three‐Dimensional Porous Organic Semiconductor Based on Fully sp2‐Hybridized Graphitic Polymer
<p>Dimensionality plays an important role in the charge transport properties of organic semiconductors. Although three- dimensional semiconductors, such as Si, are common in inorganic materials, imparting electrical conductivity to covalent three- dimensional organic polymers is challenging. Here, we report the synthesis of a three-dimensional π-conjugated porous organic polymer (3D p-POP) using catalyst-free Diels−Alder cycloaddition polymerization followed by acid-promoted aromatization. With a surface area of 801 m<sup>2</sup> g<sup>-1</sup> , full conjugation throughout the carbon backbone, and an electrical conductivity of 6(2) x 10<sup>–4</sup> S cm<sup>–1</sup> upon treatment with I<sub>2</sub> vapor, the 3D p-POP represents the first member of a new class of permanently porous 3D organic semiconductors.</p>
Raw data on computational analysis the relationships of energy and mechanical properties with sensitivity for 1, 1-diamino-2, 2-dinitroethene based polymer bonded explosives
<p>The dataset provides raw data on key properties in the text as well as raw data on the temperature and energy balances of the P, P1, P2, P3 and P4 systems at room temperature. These data allow the results obtained in the article to be reproduced, while the reader can obtain the raw data for the plots not labeled with data in the article and thus quantify the exact magnitude of the changes shown in the plots. The main work of the article is: Molecular dynamics (MD) simulations have been applied to investigate 1, 1-diamino-2, 2-dinitroethene (FOX-7) crystal and FOX-7(011)-based polymer-bonded explosives (PBXs) with four typical polymers, polyethylene glycol (PEG), fluorine-polymer (F<sub>2603</sub>), ethylene-vinyl acetate copolymer (EVA) and ester urethane (ESTANE5703) under COMPASS force field. Binding energy (E<sub>bind</sub>), cohesive energy density (CED), initiation bond length distribution, radial distribution function, and isotropic mechanical properties of FOX-7 and its PBXs at different temperatures were reported for the first time, and the relationship between them and sensitivity. Using quantum chemistry, FOX-7 was optimized with the four polymers at the B3LYP/6-311++G(d,p) level, and the structure and RDG of the optimized composite system were analyzed.</p>
Data from: Differential metal-binding properties of dynamic acylhydrazone polymers and their sensing applications
As one of common dynamic covalent bonds, acylhydrazone bond plays an important role in developing intelligent responsive materials. In this report, we present acylhydrazone-based dynamic polymers with multi-stimuli responsiveness, particularly metal recognition behaviours and their modulation. A series of polyacylhydrazones with different metal-binding sites were designed and prepared in a modular fashion. Titration of these receptors with a diverse set of metal ions, including Cu2+, Zn2+ and La3+, resulted in unique optical changes, and both the sensitivity and selectivity profiles can be regulated. Moreover, the metal-binding feature was facilely modulated by changing the solvent. The addition of weakly basic anions was employed to further fine-tune the responsiveness of the polymers by taking advantage of the cooperative effect with metal coordination. Finally, the sensitive detection of 6-mercaptopurine and pyrophosphate was achieved to demonstrate the application potential of these systems.
Data from: Differential chromosome conformations as hallmarks of cellular identity revealed by mathematical polymer modeling
Inherently dynamic, chromosomes adopt many different conformations in response to DNA metabolism. Models of chromosome organization in the yeast nucleus obtained from genome-wide chromosome conformation data or biophysical simulations provide important insights into the average behavior but fail to reveal features from dynamic or transient events that are only visible in a fraction of cells at any given moment. We developed a method to determine chromosome conformation from relative positions of three fluorescently tagged DNA in living cells imaged in 3D. Cell type specific chromosome folding properties could be assigned based on positional combinations between three loci on yeast chromosome 3. We determined that the shorter left arm of chromosome 3 is extended in MATα cells, but can be crumpled in MATa cells. Furthermore, we implemented a new mathematical model that provides for the first time an estimate of the relative physical constraint of three linked loci related to cellular identity. Variations in this estimate allowed us to predict functional consequences from chromatin structural alterations in asf1 and recombination enhancer deletion mutant cells. The computational method is applicable to identify and characterize dynamic chromosome conformations in any cell type.
Data from: Anthracycline drugs on modified surface of quercetin-loaded polymer nanoparticles: a dual drug delivery model for cancer treatment
Polymer nanoparticles are vehicles used for delivery of hydrophobic anti-cancer drugs, like doxorubicin, paclitaxel or chemopreventors like quercetin (Q). The present study deals with the synthesis and characterisation of nano formulations (NFs) from Q loaded PLGA (poly lactic-co-glycolic acid) nano particles (NPs) by surface modification. The surface of Q-loaded (NPs) is modified by coating with biopolymers like bovine serum albumin (BSA) or histones (His). Conventional chemotherapeutic drugs adriamycin (ADR) and mitoxantrone (MTX) are bound to BSA and His respectively before being coated on Q-loaded NPs to nano formulate NF1 and NF2 respectively. The sizes of these NFs are in the range 400-500 nm as ascertained by SEM and DLS measurements. Encapsulation of Q in polymer NPs is confirmed from shifts in FT-IR, TGA and DSC traces of Q-loaded NPs compared to native PLGA and Q. Surface modification in NFs is evidenced by three distinct regions in their TEM images; the core, polymer capsule and the coated surface. Negative zeta potential of Q-loaded NPs shifted to positive potential on surface modification in NF1 and NF2. In vitro release of Q from the NFs lasted up to twenty days with an early burst release. NF2 is better formulation than NF1 as loading of MTX is 85% compared to 23% loading of ADR. Such NFs are expected to overcome multi-drug resistance (MDR) by reaching and treating the target cancerous cells by virtue of size, charge and retention.
Data from: Convenient fabrication of conjugated polymer semiconductor nanotubes and their application in organic electronics
Organic heterojunction is indispensable in organic electronic devices, such as organic solar cells (OSCs), organic light-emitting diodes (OLEDs) and so on. Fabrication of core-shell nanostructure provides feasible and novel way to prepare organic heterojunction, which is beneficial for miniaturization and integration of organic electronic devices. Fabrication of nanotubes which constitute the core-shell structure in large quantity is the key for the realization of application. In this work, a simple and convenient method to prepare nanotubes utilizing conjugated copolymer of perylene diimide and dithienothiophene (P(PDI-DTT)) was demonstrated. The relationship between preparation condition (solvent atmosphere, solution concentration and pore diameter of templates) and morphology of nanostructure was studied systematically. P(PDI-DTT) nanotubes could be fabricated in regular shape and large quantity by preparing the solution with appropriate concentration and placing Anodic Aluminum Oxide (AAO) template with nanopore diameter of 200 nm in the solvent atmosphere. The tubular structure was confirmed by scanning electron microscope (SEM). P(PDI-DTT) nanotubes exhibited electron mobility of 0.02 cm2V-1s–1 in field effect transistors under ambient condition. Light emitting nanostructures were successfully fabricated by incorporating tetraphenyl ethylene (TPE) into polymer nanotubes.
Triangulene 2D polymers
<p>Supporting information for triangulene 2D polymers.</p>
Supplementary materials Polymer integration for MDPI Polymers
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Study of the electrical properties of ion irradiated polymer materials
<p><span>Folder zawiera pliki excel w których znajdują się dane pozwalające na wykonanie wykresów z publikacji.</span></p>
Simulation data for "Tuning Adhesion and Energy Dissipation in Polymer Films between Solid Surfaces via Grafting and Cross-Linking"
<p>LAMMPS input and data files, Jupyter notebooks used for the analysis of the MD simulations.</p>
The summary of main approaches that have been used for the immobilization of bacteria on conducting polymers.
<p><span>The summary of main approaches that have been used for the immobilization of bacteria on conducting polymers - data collected on May 4th, 2023.<br></span></p>
Coil-to-globule collapse of active polymers: a Rouse perspective
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Complex Isomerism Influencing the Texture Properties of Organometallic [Cu(salen)] Porous Polymers: Paramagnetic Solid-State NMR Characterization and Heterogeneous Catalysis
<p>Raw data from NMR experiments and numerical simulations.</p>
Perylene-Based Coordination Polymers: Synthesis, Fluorescent J-Aggregates, and Electrochemical Properties
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Optimizing the selection of drug-polymer-water formulations for spray-dried solid dispersions in pharmaceutical manufacturing
<p>The files contain 2 MINLP formulations and supplementary material discussed in this publication. The MINLP problems are implemented and solved in GAMS version 36.2.0, using SBB and SCIP, a local and global MINLP solver, respectively.</p>
Dataset for: A novel hydrophobically associating water-soluble polymer utilized as constant rheology agent for cement slurry
During the process of well cementing in deepwater, the cement slurry experiences a wide range of temperature variation from low temperature at seabed to high temperature in downhole. The elevated temperature affects the rheology of cement slurry. The change of rheology of cement slurry could influence the safety of cementing operation. The aim of this paper is to develop a new kind of hydrophobically associating water-soluble polymer (KWHL-1) as an additive to prepare a constant rheology oil well cement slurry, which can be used at temperature range from 4℃ to 90℃. The acrylamide, 2-acrylamide-2-methylpropionic acid and stearyl methylacrylate were applied to synthesize the KWHL-1 by the inverse microemulsion polymerization. Test results indicate that the critical association temperature of KWHL-1 is 45℃. The critical association temperature is independent with KWHL-1 concentration, salt concentration and alkalinity of solution. When the temperature is below 45℃, KWHL-1 shows little influence on the viscosity of solution. When the temperature is above 45℃, the KWHL-1 forms spatial network structure by intermolecular hydrophobic association, and thus increases the viscosity of solution significantly. The KWHL-1 also displays good thermal stability and excellent salt and alkali resistance properties. In addition, the KWHL-1 shows nearly no negative influence on the basic properties of cement slurry, which indicates that the KWHL-1 can be used as a constant rheology agent to prepare a cement slurry with constant rheology in the temperature range of 4 to 90℃.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.