[RuCl₂(<i>p-</i>cymene)]₂‑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

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^m values calculated by using Rubingh’s equation and |ln(<i>CMC</i>₁/<i>CMC</i>₂)| < |β^m| proved synergism in the three systems of higher α_NaOL or lower <i>α</i>_NaOL. An interesting phenomenon of double inflection points was observed for pure NaOL and mixtures of high <i>α</i>_NaOL. The negative Δ<i>G</i>⁰_m 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

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

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

Carbide-Forming Groups IVB-VIB Metals: A New Territory in the Periodic Table for CVD Growth of Graphene

Early transition metals, especially groups IVB-VIB metals, can form stable carbides, which are known to exhibit excellent “noble-metal-like” catalytic activities. We demonstrate herein the applications of groups IVB-VIB metals in graphene growth using atmospheric pressure chemical vapor deposition technique. Similar to the extensively studied Cu, Ni, and noble metals, these transition-metal foils facilitate the catalytic growth of single- to few-layer graphene. The most attractive advantage over the existing catalysts is their perfect control of layer thickness and uniformity with highly flexible experimental conditions by in situ converting the dissolved carbons into stable carbides to fully suppress the upward segregation/precipitation effect. The growth performance of graphene on these transition metals can be well explained by the periodic physicochemical properties of elements. Our work has disclosed a new territory of catalysts in the periodic table for graphene growth and is expected to trigger more interest in graphene research

Energy and multivariable adjusted relationship between dietary vitamin C intake and NAFLD.

<p>Energy and multivariable adjusted relationship between dietary vitamin C intake and NAFLD.</p

Solubility of 3,7,9,11-Tetraoxo-2,4,6,8,10-pentaaza[3.3.3] Propellane (TOPAP) in Different Pure Solvents at Temperatures between 273.15 and 318.15 K

The solubility of 3,7,9,11-tetraoxo-2,4,6,8,10-pentaaza[3.3.3]­propellane (TOPAP) was measured in pure H₂O and 11 other organic solvents, including methanol, acetonitrile, acetone, ethyl acetate, ethanol, tetrahydrofuran, <i>n</i>-propanol, <i>i</i>-propanol, dioxane, ethylene glycol, and toluene in the temperature range from 273.15 to 318.15 K at an interval of 5 K by the equilibrium method with ultraviolet detection. For all reagents selected, the results showed that the solubility data of TOPAP increased with increasing temperature. All of the obtained experimental results in all mentioned solvents were correlated with temperature by using the ideal solution model, Apelblat model, Yaws model, λ<i>h</i> equation, and NRTL model. The ideal solution model, Apelblat model, Yaws model, and λ<i>h</i> equation are more suitable for the correlations of solubility of TOPAP, and they have a smaller maximum relative average deviation

Insight into the Bonding Mechanism and the Bonding Covalency in Noble Gas–Noble Metal Halides: An NBO/NRT Investigation

The bonding between noble gas and noble metal halide like hydrogen bonding (H-bonding) motivates us to investigate the bonding mechanism and the bonding covalency in NgMX (Ng = He, Ne, Ar, Kr, Xe, Rn; M = Cu, Ag, Au; X = F, Cl, Br, I) complexes using natural bond orbital (NBO) and natural resonance theory (NRT) methods. In this study, we introduce the new resonance bonding model in H-bonding into NgMX bonding. We provide strong evidence for resonance bonding involving two important resonance structures: Ng: M–X ↔ Ng⁺–M :X^– in each of NgMX complexes, originating in the n_Ng → σ*_MX hyperconjugative interaction. The covalency of the bonding could be understood by the localized nature of Ng–M bonds in these two resonance structures, and the degree of Ng–M covalency can be quantitatively described by calculated NRT bond orders <i>b</i>_NgM. Furthermore, we find that the bond order satisfies conservation of bond order, <i>b</i>_NgM + <i>b</i>_MX = 1, for all of the studied complexes. On the basis of the conservation of bond order and some statistical correlations, we also reveal that the Ng–M bond (except He–Ag and Ne–Ag bonds) can be tuned by changing the auxiliary ligand X. Overall, the present studies provide new insight into the bonding mechanism and the covalency of the bonding in noble gas–noble metal halides, and develop one resonance bonding model

Subgroup analysis of multivariable-adjusted relationship between dietary vitamin C intake and NAFLD.

<p>Subgroup analysis of multivariable-adjusted relationship between dietary vitamin C intake and NAFLD.</p

Basic characteristics of the study population (n = 3471).

<p>Basic characteristics of the study population (n = 3471).</p