A Kind of Coordination Complex Cement for the Self-Assembly of Superstructure

Not like the macroscopic building materials, the controllable assembly of blocks into superstructure has not been conquered in microscale, especially for the ordinary particles with shape defects and weak surface activities. Here, a facile route of assembling particles into superstructures utilizing Mo-polydopamine complex as the binder and curing agent is established. A side-by-side adsorption and growth mechanism in a water/ethanol system is derived, and the factors influencing the final structures are verified. This system is suitable to assemble superstructures from particles of different shapes such as nanospheres, nanocubes, nanorods, and hollow spheres in the range from 10 to 500 nm in size. And after high temperature and etching treatment, the generated MoO₂/N/C frameworks with superpore structures derived from different blocks exhibit a high structural plasticity and potential application as multifunctional carriers for energy storage. Rather than the obtained system, our work assembles superstructures from various building blocks and explores more valuable complex cements for superstructures construction

Serum vitamin C levels and their correlation with chronic kidney disease in adults: a nationwide study

Inflammation and oxidative stress play significant roles in the development of chronic kidney disease (CKD). Given the recognized antioxidant properties of vitamin C, our study aimed to explore the correlation between CKD and serum vitamin C levels. Data were gathered from the 2017–2018 National Health and Nutrition Examination Survey. Participants below 18 years of age, pregnant individuals, those lacking essential data for CKD diagnosis, or individuals with incomplete serum vitamin C data were excluded. Subgroup and weighted multivariable logistic regression analyses were performed to assess the potential correlation between serum vitamin C and CKD. Our study comprised 4969 participants, revealing an overall CKD prevalence of 15.0%. The results indicated that individuals with reduced serum vitamin C levels were more likely to be male, possess lower educational attainment, have a diminished poverty-income ratio, engage in heavy drinking, and be current smokers. Additionally, they exhibited a higher prevalence of obesity and diabetes. Significantly, participants in the third quartile group experienced a 37.0%, 47.0%, and 46.6% decrease in the risk of developing albuminuria, low estimated glomerular filtration rate (eGFR), and CKD, respectively. Subgroup analysis demonstrated that individuals between 65 and 80 years of age showed a statistically reduced risk of developing CKD and low eGFR when their serum vitamin C levels fell in the third and fourth quartile groups. Our findings reveal a correlation between elevated serum vitamin C levels and a decreased risk of developing albuminuria, low eGFR, and CKD. Appropriately increasing serum vitamin C levels may hold promise in protecting renal function, particularly among older individuals.</p

Effects of Mineral Compositions on Matrix Diffusion and Sorption of ⁷⁵Se(IV) in Granite

Exploring the migration behaviors of selenium in granite is critical for the safe disposal of radioactive waste. The matrix diffusion and sorption of ⁷⁵Se­(IV) (analogue for ⁷⁹Se) in granite were systematically studied to set reliable parameters in this work. Through-diffusion and batch sorption experiments were conduct with four types of Beishan granite. The magnitudes of the obtained apparent diffusion coefficient (<i>D</i>_a) values are of the following order: monzogranite > granodiorite-2 > granodiorite-1, which is opposite to the sequence of the <i>K</i>_d values obtained from both the diffusion model and batch sorption experiments. The EPMA results of the granitic flakes showed that there was no obvious enrichment of Se­(IV) on quartz, microcline and albite. Only biotite showed a weak affinity for Se­(IV). Macroscopic sorption behaviors of Se­(IV) on the four types of granite were identical with the sequence of the granitic biotite contents. Quantitative fitting results were also provided. XPS and XANES spectroscopy data revealed that bidentate inner-sphere complexes were formed between Se­(IV) and Fe­(III). Our results indicate that biotite can be representative of the Se­(IV) sorption in complex mineral assemblages such as granite, and the biotite contents are critically important to evaluate Se­(IV) transport in granite

Metal-Organic Framework Template Synthesis of NiCo₂S₄@C Encapsulated in Hollow Nitrogen-Doped Carbon Cubes with Enhanced Electrochemical Performance for Lithium Storage

Owing to its richer redox reaction and remarkable electrical conductivity, bimetallic nickel cobalt sulfide (NiCo₂S₄) is considered as an advanced electrode material for energy-storage applications. Herein, nanosized NiCo₂S₄@C encapsulated in a hollow nitrogen-doped carbon cube (NiCo₂S₄@D-NC) has been fabricated using a core@shell Ni₃[Co­(CN)₆]₂@polydopamine (PDA) nanocube as the precursor. In this composite, the NiCo₂S₄ nanoparticles coated with conformal carbon layers are homogeneously embedded in a 3D high-conduction carbon shell from PDA. Both the inner and the outer carbon coatings are helpful in increasing the electrical conductivity of the electrode materials and prohibit the polysulfide intermediates from dissolving in the electrolyte. When researched as electrode materials for lithium storage, owing to the unique structure with double layers of nitrogen-doped carbon coating, the as-obtained NiCo₂S₄@D-NC electrode maintains an excellent specific capacity of 480 mAh g^–1 at 100 mA g^–1 after 100 cycles. Even after 500 cycles at 500 mA g^–1, a reversible capacity of 427 mAh g^–1 can be achieved, suggesting an excellent rate capability and an ultralong cycling life. This remarkable lithium storage property indicates its potential application for future lithium-ion batteries

Demographic and Clinical Characteristics of the Sample.

<p>Demographic and Clinical Characteristics of the Sample.</p

Visible Light Accelerates Cr(III) Release and Oxidation in Cr–Fe Chromite Residues: An Overlooked Risk of Cr(VI) Reoccurrence

The reduced chromite ore processing residue (rCOPR) deposited in environments is susceptible to surrounding factors and causes reoccurrence of Cr(VI). However, the impact of natural sunlight on the stability of rCOPR is still unexplored. Herein, we investigated the dissolution and transformation behaviors of Cr(III)–Fe(III) hydroxide, a typical Cr(III)-containing component in rCOPR, under visible light. At acidic conditions, the release rate of Cr(III) under illumination markedly increased, up to 7 times higher than that in the dark, yet no Cr(VI) was produced. While at basic conditions, only Cr(VI) was obtained by photo-oxidation, with an oxidation rate of ∼7 times higher than that by δ-MnO2 under dark conditions at pH 10, but no reactive oxygen species was generated. X-ray absorption near-edge structure and density functional theory analyses reveal that coexisting Fe in the solid plays a critical role in the pH-dependent release and transformation of Cr(III), where photogenerated Fe(II) accelerates Cr(III) produced at acidic conditions. Meanwhile, at basic conditions, the production of intermediate Cr(III)–Fe(III) clusters by light leads to the oxidation of Cr(III) into Cr(VI) through the nonradical “metal-to-metal charge transfer” mechanism. Our study provides a new insight into Cr(VI) reoccurrence in rCOPR and helps in predicting its environmental risk in nature

White matter regions with significant differences in FA between patients and controls (<i>P</i> < 0.01, two-tailed, FWE corrected).

<p>FA, fractional anisotropy.</p

Boosting Reversibility of Conversion/Alloying Reactions for Sulfur-Rich Antimony-Based Sulfides with Extraordinary Potassium Storage Performance

As a new sort of energy storage device, potassium-ion batteries (PIBs) have broad application prospects in the post-lithium-ion battery era. Among the massive anode materials for PIBs, Sb-based sulfides have attracted much attention because of their high potassium storage capacity and abundant resources. However, the huge volume expansion, sluggish K+ storage kinetics, and low reaction reversibility hinder their applications. Here we composited commercial Sb2S5 with cobalt- and nitrogen-codoped carbon (CoNC) via a facile ball-milling strategy, making it an efficient anode material for PIBs. The synergistic effect between the catalysis of Co and buffering of the carbon matrix enhances the reversibility of the conversion/alloying reaction, alleviates the volume inflation, and improves the electrochemical kinetics, thus enabling the electrode to exhibit enhanced electrochemical performance. The prepared anode delivers a high reversible specific capacity (468.5 mAh g–1 at 500 mA g–1) and outstanding cycling stability (98% capacity retention after 150 cycles). In situ characterization clarified its potassium storage mechanism, and theoretical calculations revealed the reason for the improved electrochemical performance

Statistics of KEGG enrichment of the up-regulated (A) and down-regulated (B) common DEGs.

<p>Histograms indicate 10 most abundant KEGG pathways.</p

Histograms showing GO functional analysis of the up-regulated (A) and down-regulated (B) common DEGs.

<p>The <i>x</i>-axis indicates the names of the eight most abundant classes in each of the three main GO categories. The <i>y</i>-axis indicates the numbers of common DEGs.</p