The nuclear contact characterizes the nucleon-nucleon pairs in close proximity and serves as an important tool for studying the short-range correlations (SrCs) within atomic nuclei. While they have been extracted for ...
The nuclear contact characterizes the nucleon-nucleon pairs in close proximity and serves as an important tool for studying the short-range correlations (SrCs) within atomic nuclei. While they have been extracted for selected nuclei, the investigation of their behavior across the nuclear chart remains limited. Very recently, Yankovich, Pazy, and Barnea have proposed a set of universal laws (YPB laws) to describe the correlation between nuclear contacts and nuclearradii and tested their laws for a small number of nuclei by using the Woods-Saxon mean- field model Yankovich et al. (2021) [32]. In this Letter, we extend their study to a majority part of the nuclear chart within the framework of the Skyrme Hartree-Fock-Bogolyubov model, which incorporates several essential beyond-mean-field features and offers a more accurate description of the bulk properties of atomic nuclei. Ourresults suggest that the YPB laws hold as a good approximation fordifferent nuclear mass regions, with minordeviations attributed to, e.g., isospin-breaking effects. Our work lays a firm foundation for future applications of the YPB laws in finite nuclei and provides new evidence for the long-range nature of the relative abundance of short-range pairs.
Sialic acids are the terminal units of glycans in glycoproteins or glycolipids. The determination of sialic acids in glycoconjugates is crucial since they regulate essential biological functions and have a significant...
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Sialic acids are the terminal units of glycans in glycoproteins or glycolipids. The determination of sialic acids in glycoconjugates is crucial since they regulate essential biological functions and have a significant nutritional value. To achieve a specific and high-throughput in situ determination of sialic acids in glycoconjugates, a laser-desorption/ionization mass spectrometry (LdI-MS)-based strategy is reported by integrating chemoselective labeling and laser-cleavable mass tagging. 1-Pyrenebutyric hydrazide (PBH), a commercially available reagent that contains a pyrene moiety and a hydrazide group, has been developed as a novel laser-cleavable mass tag. For chemoselective labeling, an aldehyde group is introduced to the polyhydroxy side chain of sialic acids through mild periodate oxidation and then reacted with PBH, achieving the in situ determination of sialic acids. The quantitative determination of sialic acids in the range of 5-1000 mu M (r2 = 0.99984) was achieved using an internal standard method. Thus, a specific, quantitative, and high-throughput method was developed for the in situ determination of sialic acids in glycoconjugates. Finally, this method has been successfully used to quantify the sialic acid content in EBN proteins and glycoprotein biopharmaceuticals, showing its practical application in the quality control of nutritional and therapeutic glycoprotein products. Additionally, the pyrene moiety, when linked to otherreactive groups, can also be utilized to analyze other biomolecules, offering a new route for the rational design of mass tags.
Numerous modification strategies have been proposed to enhance the performance of the Zn anode and carbon cathode in aqueous zinc-ion hybrid capacitors (ZIHCs). However, one efficient strategy to modify both the anode...
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Numerous modification strategies have been proposed to enhance the performance of the Zn anode and carbon cathode in aqueous zinc-ion hybrid capacitors (ZIHCs). However, one efficient strategy to modify both the anode and cathode is still lacking. Herein, taurine (Tau), the key ingredient of energy drinks, is used as the electrolyte additive and carbon precursor for ZIHCs simultaneously. As the electrolyte additive, Tau achieves the preferential growth of Zn (002) plane by preferentially adsorbing on other crystal planes. Moreover, Tau accelerates Zn2+ transference kinetics by regulating the Zn2+ solvation structure and constructs a functional solid electrolyte interphase layer, enabling suppressed hydrogen evolution, inhibited corrosion reaction, anddendrite-free deposition. The Zn//Zn cells using the Tau-modifiedddle dot>ZnSO4 electrolyte (Tau-ZSO) can stably work for 1000 h at 76.95% depth of discharge at room temperature and 5200 h at -10 degrees C. Meanwhile, the taurine-derived carbon (Tau-C) exhibits N, S heteroatom doping, hierarchical porous structure, and high specific surface area, which contributes to a high cathode capacity. By using the Tau-C cathode, limited Zn anode (10 mu m), and the Tau-ZSO electrolyte, the assembled ZIHCs demonstrate reduced polarization and high discharge capacities (119.4 mA h g-1 under 3 A g-1 at room temperature and 80.0 mA h g-1 under 1 A g-1 at -10 degrees C) with high energy density of 101.1 Wh kg-1 and long lifetime (operating stably over 2000 cycles).
The classification andrecognition of underwater acoustic signal (UAS) is an important way to achieve surface and underwater sensing, which is of great significance to modern naval warfare and marine ecological protec...
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AIM:To compare the efficacy of different administration regimens of compound tropicamide eyedrops(CTE)for pupil dilation for children with dark ***:A prospective,comparative,randomized interventional study was *** in ...
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AIM:To compare the efficacy of different administration regimens of compound tropicamide eyedrops(CTE)for pupil dilation for children with dark ***:A prospective,comparative,randomized interventional study was *** in Group 1 received CTE 3 times with a 3min interval between each *** in Group 2 received CTE 4 times with a 5min interval between each *** measured their pupil diameters at baseline(pre-drug instillation)and 30min and 60min post-drug instillation and assessed the pupillary light reflex at 60min post-drug ***:In total,194 eyes of 101 children were *** changes of pupil diameter at 30min and 60min post-drug instillation were 1.2±0.6 mm and 2.3±1.0 mm in Group 1,and 2.3±0.9 mm and 3.7±1.0 mm in Group 2,*** 2 showed a larger change in pupil size than Group 1 at 30min(P<0.01)and 60min(P<0.01).The effect of pupil dilation in Group 2 was 1.25 times that in Group *** change in pupil size was positively associated with age.A higher proportion of children in Group 1 had smaller pupil diameter andreactive pupils at the final time point,with only 33 children(33.7%)had final pupil size≥6.5 mm,and only 9 children(9.2%)had non-reactive *** in Group 2 achieved larger pupil diameter and more nonreactive pupils at the final time point,with 84 children(87.5%)had final pupil size≥6.5 mm,and only 22 children(22.9%)hadreactive ***:Increasing the frequency of compound tropicamide and lengthening the interval between eye drop applications can produce stronger mydriatic effects.
developing solvents with balanced physicochemical properties for high-voltage cathodes and lithium metal anodes is crucial for a sustainable and intelligent future. Herein, we report fully methylated tetramethyl-1,3-d...
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developing solvents with balanced physicochemical properties for high-voltage cathodes and lithium metal anodes is crucial for a sustainable and intelligent future. Herein, we report fully methylated tetramethyl-1,3-dimethoxydisiloxane (TMMS) as a single solvent for lithium metal batteries. We demonstrate that the fully methylated structure and Si-O bonds within TMMS can effectively elevate the dehydrogenation energy barrier, migrating the oxidation decomposition of the electrolyte. Additionally, the weak solvating power of TMMS favors the formation of an anion-rich solvation structure that induces the generation of an inorganic-rich electrode/electrolyte interphase layer at both the cathode and anode. Accordingly, the formulated electrolyte exhibits remarkable stability against high-voltage cathodes and lithium metal anodes. Notably, LiNi0.8Co0.1Mn0.1O2||Li (NCM811||Li) full cells with TMMS-based electrolytes realize a significant improvement in capacity retention compared with a dimethoxyethane-based electrolyte at both room temperature and 50 degrees C. This work provides insight into full methylation and the Si-O bond strategy and paves the way for the development of high-voltage lithium metal batteries.
Operando electron paramagnetic resonance is used to monitor the light-initiated generation of the diethylnitroxyl radical from diethylhydroxylamine (dEHA) and its decay kinetics, thereby unveiling solvent effects on b...
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Operando electron paramagnetic resonance is used to monitor the light-initiated generation of the diethylnitroxyl radical from diethylhydroxylamine (dEHA) and its decay kinetics, thereby unveiling solvent effects on both the electronic structure and stability of the nitroxyl radical. The observed trends in hyperfine coupling constants (A N and A H) across different solvents align with previously reported values of the 4-amino-2,2,6,6-tetramethylpiperidoxyl radical (ATEMPO). regarding the stability of the dEHA radical in various solvents, the obtaineddecay-kinetic constants (k) correlated more strongly with A N than with the permittivity of the solvents. Moreover, distinguishing between protic and aprotic solvents leads to a betterrelationship between A N and k, and a positive and constant correction of the nitroxyl radical's A N supports the hydrogen-bonding effect in protic solvents. These findings indicate that mere hydrogen-bonding interaction does not enhance the stability of radicals. A N of ATEMPO may serve as a superior metric for assessing the impact of solvent effects on both the electronic structure and stability of nitroxyl radicals. The data presented in this study will offer substantiation for the judicious selection of suitable solvents in reactions involving radicals.
Soft magnetic composites (SMCs) composed of insulating magnetic particles are essential for advancements in power electronics. Nonetheless, the high molding pressure associated with traditional cold-pressing methods c...
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Synthetic aperture radar (SAr) image classification has benefited significantly from deep learning techniques, which excel at automatically learning semantic features from data. However, compared with optical remote s...
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Synthetic aperture radar (SAr) image classification has benefited significantly from deep learning techniques, which excel at automatically learning semantic features from data. However, compared with optical remote sensing images, SAr images face a more pronounced sample limitation problem due to sparsely distributed training samples and complex backgrounds. As a result, the performance of data-driven SAr image classification significantly degrades due to overfitting, especially when deep learning algorithms operate underdata scarcity. To address these challenges, we present a novel few-shot SAr classification approach using a multiple- prototype ensemble network within the meta-learning paradigm. Specifically, to better capture the scattering feature distribution and enhance intra-category aggregation in SAr images, multiple prototypes are learned to fully leverage the semantic information embedded in the limited support samples. Furthermore, we introduce a subspace discriminative loss to improve the representational power of the learned prototypes by ensuring consistency in SAr feature representation while maintaining inter-class divergence. Extensive experiments conducted on three real-worlddatasets demonstrate the superiority of the proposed method compared to several state-of-the-art approaches.
In this paper,the authors firstly establish the weak laws of large numbers on the canonical space(r^(N),B(r^(N)))by traditional truncation method and Chebyshev’s inequality as in the classical probability *** they ex...
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In this paper,the authors firstly establish the weak laws of large numbers on the canonical space(r^(N),B(r^(N)))by traditional truncation method and Chebyshev’s inequality as in the classical probability *** they extend them from the canonical space to the general sublinear expectation *** necessary and sufficient conditions for Peng’s law of large numbers are obtained.
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