202 research outputs found
Supplementary document for Interleave-sampled photoacoustic (PA) imaging: a doubled and equivalent sampling rate for high-frequency imaging - 5906754.pdf
Supplemental documen
A Novel Family of Ordered, Mesoporous Inorganic/Organic Hybrid Polymers Containing Covalently and Multiply Bound Microporous Organic Hosts
We have prepared a new family of periodic hybrid polymers containing microporous cavities
provided by covalently bound organic hosts. Cyclodextrin (CD) or calixarene (CX) hosts are attached to
four or more trialkoxysilyl groups, which are polymerized to form a polysilsesquioxane matrix. Structural
integrity is provided by copolymerization with tetraethoxysilane, which produces a polysilicate co-matrix.
Periodic order is created by carrying out the polymerization in the presence of a surfactant, cetyltrimethylammonium bromide. The resulting as-synthesized polymers from these three starting materials were
characterized by solid-state nuclear magnetic resonance spectroscopy. The 13C and 29Si spectra provided
evidence for intact polysilsesquioxane, polysilicate, organic host, and surfactant. Removal of the surfactant
by washing produced a polymer containing cavities of mesoporous dimensions, in addition to the microporous
host cavities. The purpose of introducing mesoporosity is to allow enhanced access of guests to the
microporous hosts. Transmission electron microscopy demonstrated that both as-synthesized and solvent-extracted polymers have a periodic structure. All polymers are completely insoluble in water. The
as-synthesized CD-containing polymers extracted up to >99% of 4-nitrophenol from aqueous solution,
and the solvent-extracted CX-containing polymers extracted up to 67% of Fe3+ and lesser amounts of
other metal cations from aqueous solution, with interesting selectivity patterns. Simple filtration then removes
the polymer containing the extracted organic molecule or metal cation. These extraction abilities are superior
to previous materials
Surface properties, micellar molecular interaction, and physical properties for binary systems of sodium oleate with three anionic surfactants
<p>The mixed micellization of the anionic surfactant sodium oleate (NaOL) and three anionic surfactants (NaDC, AOT, SDS) of different structures in 0.01 mol/L NaCl solution was investigated by surface tension measurement at different temperatures. All the investigated mixtures exhibited nonideal behaviors as the experimental critical micelle concentration (<i>CMC</i>) values were less than the values calculated by using the Clint’s equation. Negative β<sup>m</sup> values calculated by using Rubingh’s equation and |ln(<i>CMC</i><sub>1</sub>/<i>CMC</i><sub>2</sub>)| < |β<sup>m</sup>| proved synergism in the three systems of higher α<sub>NaOL</sub> or lower <i>α</i><sub>NaOL</sub>. An interesting phenomenon of double inflection points was observed for pure NaOL and mixtures of high <i>α</i><sub>NaOL</sub>. The negative Δ<i>G</i><sup>0</sup><sub>m</sub> values for the mixed systems imply that the micelle formations are spontaneous process. The NaOL/NaDC system was also studied in buffer solution (pH 8, 12) at 30°C which also exhibited nonideal behavior. Synergism existed at pH 12 but not at pH 8 for the NaOL/NaDC system. It is noteworthy that there were no double inflection points for NaOL/NaDC system in buffer solution (pH 8, 12). Krafft point and calcium stability data show that these three anionic surfactants can improve the water solubility and hard-water resistance of soap.</p
[RuCl<sub>2</sub>(<i>p-</i>cymene)]<sub>2</sub>‑Catalyzed Conjugate Addition of Arylboronic Acids to α,β-Unsaturated Ketones under Ligand-Free and Neutral Conditions
A simple
and efficient Ru-catalyzed conjugate addition reaction
of arylboronic acids to α,β-unsaturated ketones under
neutral conditions without any additional ligands has been developed.
This Ru(II)-catalytic system both fulfilled the inhibition of the
β-hydride elimination in the catalytic cycle and minimized the
protonolysis of arylboronic acids
Wrinkle Engineering: A New Approach to Massive Graphene Nanoribbon Arrays
Wrinkles are often formed on CVD-graphene in an uncontrollable way. By designing the surface morphology of growth substrate together with a suitable transfer technique, we are able to engineer the dimension, density, and orientation of wrinkles on transferred CVD-graphene. Such kind of wrinkle engineering is employed to fabricate highly aligned graphene nanoribbon (GNR) arrays by self-masked plasma-etching. Strictly consistent with the designed wrinkles, the density of GNR arrays varied from ∼0.5 to 5 GNRs/μm, and over 88% GNRs are less than 10 nm in width. Electrical transport measurements of these GNR-based FETs exhibit an on/off ratio of ∼30, suggesting an opened bandgap. Our wrinkle engineering approach allows very easily for a massive production of GNR arrays with bandgap-required widths, which opens a practical pathway for large-scale integrated graphene devices
Functional Analogues of Cytochrome <i>c</i> Oxidase, Myoglobin, and Hemoglobin
Functional Analogues of Cytochrome c Oxidase, Myoglobin, and Hemoglobi
Additional file 1 of ANXA1 is identified as a key gene associated with high risk and T cell infiltration in primary sclerosing cholangitis
Additional file 1. Details of 185 DEGs
Additional file 3 of Upregulation of microRNA-328-3p by hepatitis B virus contributes to THLE-2 cell injury by downregulating FOXO4
Additional file 3: Figure S3. Representative scatter plot detecting apoptosis by flow cytometry. The apoptosis rate was shown in Fig. 8b
DataSheet1_Velocity changes after the 2021 MS 6.4 Yangbi earthquake based on passive image interferometry.docx
An MS 6.4 earthquake occurred in Yangbi, Yunan Province, China, on 21 May 2021. The epicenter was on the blind branch fault in the west of the Weixi–Qiaohou–Weishan fault, but no surface rupture was obvious. In the present study, the continuous vertical component of waveforms that were recorded in six nearby permanent stations was collected and the noise cross-correlation and autocorrelation techniques were utilized to investigate velocity changes that were induced by the Yangbi Earthquake. Velocity changes based on the single-station autocorrelation method reveal mainly coseismic declines, and a maximum of .09% was recorded in the EYA station. Results from the cross-correlation technique show both positive and negative velocity changes, and these lasted for approximately 3 months. The volumetric strain that was generated by the Yangbi Earthquake at a depth of 5 km exhibits an obvious four-quadrant distribution. Station pairs in the dilatation region (e.g., EYA–HEQ) mainly display a decrease in velocity, whereas those in the contraction region (e.g., BAS–TUS, TUS–YUL, and LUS–TUS) show an increase in velocity. Based on the depth sensitivity of scattered waves, velocity changes that were obtained using the noise cross-correlation involve the highest weight coefficients near the related two stations. Regarding stations of one station pair in different stress loading regions, the static stress of the station that is nearest to the epicenter exerted a greater impact on the velocity change. The observed velocity changes are likely attributed to a combination of near-surface physical damage and static stress changes. The validation of clock errors with magnitudes of seconds that were obtained using the noise cross-correlation and effects of these errors on measured velocity changes are also discussed.</p
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