摘要：
Ferroptosis is a regulated form of cell death that involves iron-dependent lipid peroxidation. Ferroptosis-related genes (FRGs) play an essential role in the tumorigenesis of gastric cancer (GC), which is one of the most common and lethal cancers worldwide. Understanding the prognostic significance of FRGs in GC can shed light on GC treatment and diagnosis. In this study, we proposed a new gene co-expression network analysis method, namely EP-WGCNA. This method used Euclidean and Pearson weighted distance (EP_dis) to construct a weighted gene co-expression network instead of the Pearson’s correlation coefficient used in the original WGCNA method. The aim was to better capture the interactions and functional associations among genes. We used EP-WGCNA to identify the FRGs related to GC phenotype and applied bioinformatics methods to select the FRGs associated with the prognosis (P-FRGs) of GC patients. Firstly, we screened the FRGs that were differentially expressed based on the TCGA and GTEx databases. Then, we selected the P-FRGs using EP-WGCNA, Cox regression, and Kaplan–Meier analysis. The prognostic model based on P-FRGs-Cox (ALB, BNIP3, DPEP1, GLS2, MEG3, PDK4, TF, and TSC22D3) was constructed on the TCGA-GTEx dataset. According to the median risk score, all patients in the TCGA training dataset and GSE84426 testing dataset were classified into a high- or low-risk group. GC patients in the low-risk group showed higher survival probability than those in the high-risk group. The time-dependent receiver operating characteristic (timeROC) showed that EP-WGCNA-Cox predicted 0.77 in the training set and 0.64 in the testing set for the 5-year survival rate of GC patients, which was better than traditional WGCNA-Cox (P-WGCNA-Cox). In addition, we validated that the P-FRGs were significantly differentially expressed in the adjacent non-tumor gastric tissues and tumor tissues by immunohistochemical staining from the Human Protein Atlas (HPA) database. We also found that the P-FRGs were enriched in tumorigenic pathways by enrichment analysis. In conclusion, our study demonstrated that EP-WGCNA can mine the key FRGs related to the phenotype of GC and is superior to the P-WGCNA. The EP-WGCNA-Cox model based on P-FRGs is reliable in predicting the survival rate of GC patients and can provide potential biomarkers and therapeutic targets for GC.
作者机构：
[Zhang, Hongyan; Xu, Yalan; Zhu, Lei; Ning, Zilan; Zhu, Liu] Hunan Agr Univ, Coll Informat & Intelligence, Changsha 410128, Peoples R China.;[Zhang, Hongyan; Li, Lanzhi] Hunan Agr Univ, Hunan Engn & Technol Res Ctr Agr Big Data Anal & D, Changsha 410128, Peoples R China.;[Cao, Dan] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.
通讯机构：
[Hongyan Zhang] H;Hunan Engineering and Technology Research Center for Agricultural Big Data Analysis and Decision-Making, Hunan Agricultural University, Changsha 410128, China<&wdkj&>College of Information and Intelligence, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
rice;protein–protein interaction;coexpression network;drought stress gene;random walk with restart
摘要：
Drought stress-related gene identification is vital in revealing the drought resistance mechanisms underlying rice and for cultivating rice-resistant varieties. Traditional methods, such as Genome-Wide Association Studies (GWAS), usually identify hundreds of candidate stress genes, and further validation by biological experiements is then time-consuming and laborious. However, computational and prioritization methods can effectively reduce the number of candidate stress genes. This study introduces a random walk with restart algorithm (RWR), a state-of-the-art guilt-by-association method, to operate on rice multiplex biological networks. It explores the physical and functional interactions between biological molecules at different levels and prioritizes a set of potential genes. Firstly, we integrated a Protein-Protein Interaction (PPI) network, constructed by multiple protein interaction data, with a gene coexpression network into a multiplex network. Then, we implemented the RWR on multiplex networks (RWR-M) with known drought stress genes as seed nodes to identify potential drought stress-related genes. Finally, we conducted association analysis between the potential genes and the known drought stress genes. Thirteen genes were identified as rice drought stress-related genes, five of which have been reported in the recent literature to be involved in drought stress resistance mechanisms.
摘要：
Development of nitrogen-rich energetic materials has gained much attention because of their remarkable properties including large nitrogen content and energy density, good thermal stability, low sensitivity, good energetic performance, environmental friendliness and so on. Tetrazole has the highest nitrogen and highest energy contents among the stable azoles. The incorporation of diverse explosophoric groups or substituents into the tetrazole skeleton is beneficial to obtain high-nitrogen energetic materials having excellent energetic performance and suitable sensitivity. In this review, the development of high-nitrogen energetic materials based on tetrazole skeleton is highlighted. Initially, the property and utilization of nitrogen-rich energetic materials are presented. After showing the advantage of the tetrazole skeleton, the high-nitrogen energetic materials based on tetrazole are classified and introduced in detail. Based on different types of energetic materials (EMs), the synthesis and properties of nitrogen-rich energetic materials based on mono-, di-, tri- and tetra-tetrazole are summarized in detail.
作者机构：
[Li, Hongliang] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;[Deng, Mingxiang] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.
通讯机构：
[Mingxiang Deng] C;College of Science, Central South University of Forestry and Technology, Changsha, China
摘要：
Correction for ‘A graphite-modified natural stibnite mineral as a high-performance anode material for sodium-ion storage’ by Hongliang Li et al., RSC Adv., 2019, 9, 28953–28960, https://doi.org/10.1039/C9RA02663K.
作者机构：
[An, Feng Hui] Jiujiang Univ, Jiangxi Prov Engn Res Ctr Mat Surface Remfg, Jiujiang 332005, Jiangxi, Peoples R China.;[Yuan, Yu Zheng; He, Meng Dong] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;[Liu, Jian Qiang] Jiujiang Univ, Coll Sci, Jiujiang 332005, Jiangxi, Peoples R China.;[Zhang, Bo] Jiangxi Univ Sci & Technol, Energy Mat Comp Ctr, Sch Energy & Mech Engn, Nanchang, Peoples R China.
通讯机构：
[Liu, Jian Qiang] C;College of Science, Jiujiang University Jiujiang Jiangxi 332005 China
摘要：
Tungsten oxide is regarded as the most promising electrochromic material owing to its continuously tunable optical properties, low cost, and high coloration efficiency. Further improving its optical modulation, switching speed, and coloration efficiency is important to electrochromic smart windows and related devices. Here, we demonstrate an enhanced electrochromic film composed of a WO(3) nanosheet and ITO nanoparticles developed by an all-solution technology. The WO(3) nanosheet is fabricated by an acid-assisted hydrothermal process with high product efficiency. The introduction of an ITO into the WO(3) nanosheets significantly improved the electrochemical activity and the conductivity of the composite film. Compared with a reported electrochromic film without ITO doping, our synthesized composite WO(3) film exhibited optical modulation up to 88% and a high coloration efficiency of 154.16 cm(2) C(-1). Particularly, our electrochromic film was based on the dispersant solution and spin-coating technology, which may also be realized with nano-spray coating for large scale applications. The results offer an effective way to develop large-area electrochromic film and devices.
摘要：
A scheme for modulating Kerr nonlinearity and optical bistability (OB) based on a monolayer graphene nanoribbon nanoresonator (NR) and a metallic nanoshell (MNS) is proposed. The MNS is made of an Au nanoshell and a dielectric core. Here, we not only demonstrate that the spectrum of the Kerr coefficient can switch from a four-peaked structure to a two-peaked structure by increasing the shell thickness of the MNS, but also plot bistability phase diagrams in the system’s parameter subspace, revealing that the bistable effect can be controlled via zero-channel, one-channel or two-channels by only changing the shell thickness in a strong exciton-phonon coupling regime. Additionally, the calculated results also show that the material of the core of MNS plays an essential role in tuning OB when the shell thickness is fixed. The findings pave a new way for developing optical Kerr switches and high-flexible bistable nanodevices.
摘要：
In this paper, we have investigated optical bistability modulation of transmitted beam that can be achieved by graphene sandwich structure with topological interface modes at terahertz frequency. Graphene with strong nonlinear optical effect was combined with sandwich photonic crystal to form a new sandwich structure with topological interface modes. The light-limiting properties of the topological interface modes, as well as its high unidirectionality and high transmission efficiency, all contribute positively to the reduction of the optical bistability threshold. In addition, the topological interface modes can effectively ensure the stability of the two steady state switching in the case of external interference. Moreover, optical bistability is closely related to the incident angle, the Fermi energy, the relaxation time, and the number of layers of graphene. Through parameter optimization, optical bistability with threshold of 105 V/m can be obtained, which has reached or is close to the range of the weak field.(c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
通讯机构：
[Tao Xu; Wenlei Wang] C;College of Science, Central South University of Forestry and Technology, Changsha, 410004, China
关键词：
Power attenuation mode;Electrochemical oxidation;Removal efficiency;Rhodamine B;Energy consumption;Current efficiency
摘要：
Electrochemical oxidation is a rapid and efficient technology to remove organic matter from wastewater, but the most obvious defects are low current efficiency and high energy consumption. This paper presents a novel power supply mode with power attenuation. The attenuated power is periodically input to the reaction system to improve the average current efficiency and reduce energy consumption. The removal efficiency, current efficiency and energy consumption of treating Rhodamine B were compared between the two modes of power attenuation and the conventional direct current. Applying current attenuation in the step-Mode A1, 98.58% Rhodamine B was decomposed and the COD removal efficiency was 91.47%. The current efficiency reached 18.49% and electrocal energy consumption was only 44.58 kWh.m(-3). Under the conditions of the same removal efficiency of Rhodamine B, the current efficiency of Mode A1 was 2.04 times larger than that of Mode D1, and the energy consumption was only 45.41% of Mode D1. Five cycles of experiments show that the boron-doped diamond electrode has obvious stability and reusability in the electrochemical oxidation process. (OH)-O-center dot was the main active substance involved in Rhodamine B degradation. The power attenuation mode to treat Rhodamine B dyes electrochemically will be the most promising saving energy method for efficient processing dyes wastewater in the future.
摘要：
A facile and efficient electrochemical platform based on multi-walled carbon nanotube (MWCNT)-poly-L-lysine (PLL) hybrids was prepared for studying on the immobilization and in vitro electrochemical behavior of cells. The PLL/MWCNT hybrids form a reticulate structure on the electrode surface, which provides a biocompatible and efficient microenvironment for cell immobilization. In contrast to the cells/glass carbon (GC) electrode, the cells/PLL/MWCNT hybrid-modified GC electrode exhibits a negatively shifted peak potential and a greatly enhanced peak current, indicating better electrochemical property of the PLL/MWCNT for evaluating the electrochemical behavior of cells. The effect of anticancer drug (adriamycin, ADR) treatment on the electrochemical signal of human breast cancer MCF-7 cells was evaluated. The ADR treatment leads to obviously decrease of the cell voltammetric response, being well accordant with the results obtained from conventional in vitro cytotoxicity assay. The proposed method may provide a simple way to quantitatively study the in vitro cell viability and cytotoxicity of ADR or other anticancer drugs.
摘要：
Pyrene-based covalent organic frameworks (sp(2)c-COF and Py-NH2-COF) were successfully prepared via a solvothermal route. Upon the irradiation of visible light, COFs were used to degrade tetracycline hydrochloride (TC) in aqueous solution. The results showed that sp(2)c-COF exhibited much better photocatalytic activity than Py-NH2-COF. 73.5 and 3.1% TC could be degraded within 90.0 min with the initial concentration of 20 mg/L via sp(2)c-COF and py-NH2-COF under visible-light irradiation, respectively. The influence of bond connection types on the visible-light catalytic ability of COFs was explored. Electrochemical impedance spectroscopy (EIS) results proved that sp(2)c-COF had a higher photogenerated electron-hole separation efficiency. X-ray photoelectron spectroscopy (XPS) and Mott-Schottky plots revealed that the band gaps of sp(2)c-COF and Py-NH2-COF were 1.98 and 2.28 eV, respectively, resulting in sp(2)c-COF having a higher electron carrier transport efficiency. Importantly, sp(2)c-COF exhibits good reusability, affording 70.3% degradation efficiency even after 5 successive recycles. Active species trapping experiments and electron paramagnetic resonance (EPR) and electrochemical analyses were performed to consult the proposed degradation mechanism. This work indicates that the COF with C=C bonds could improve electron hole separation and electron carrier transport more effectively than the COF with C=N bonds in the photocatalytic process, which led to a more effective way of transmission of pi conjugation across the two-dimensional (2D) lattice and thus enhanced the electron delocalization. So it was more beneficial for the degradation of tetracycline.
摘要：
Precise DEMs at high spatial resolution are indispensable for a variety of scientific studies and applications. Presently, the TanDEM-X mission possesses the capability to collect global-scale InSAR data at high spatial resolution, enabling the generation of a high-resolution global DEM (12 m). Nevertheless, directly utilizing InSAR data poses challenges in detecting sub-canopy topography within forest areas, due to the presence of volume scattering and limited penetration of X-band. Conversely, the upcoming BIOMASS mission operated in P-band will provide an exceptional opportunity for sub-canopy topography extraction, owing to its strong penetration and the capability to collect fully-polarimetric SAR data. However, it is imperative to acknowledge that BIOMASS data do have its own limitation, manifesting as lower resolution (100 m) due to limited bandwidth. To address these challenges and generate high-resolution sub-canopy topography, we propose a new method that leverages the strengths of both TanDEM-X InSAR and BIOMASS PolInSAR datasets through the wavelet transform. We evaluated the performance of our method at two test sites characterized by different forest types and terrain conditions using airborne LiDAR data. Our findings demonstrate a significant improvement in sub-canopy topography accuracy. Specifically, under the boreal coniferous forest scenario, the root mean square error (RMSE) of the resulting sub-canopy topography decreased by 44% compared to the TanDEM-X InSAR DEM. In tropical broadleaf forest scenario, the RMSE reduction reached 64% over the TanDEM-X InSAR DEM. These results indicate the potential of our approach for high-resolution sub-canopy topography mapping by combing data from these two different spaceborne SAR sensors.
通讯机构：
[He, MD ] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
摘要：
Metamaterial-based technologies offer opportunities to realize spin-selective encryption platforms for key encoding, yet the flexibility and controllability of encrypted imaging are not satisfactory well enough. In this paper, we propose a temperature tunable chirality-selective meta-absorber based on the thermal phase change material of vanadium dioxide (VO2). The meta-absorber has the functionality of spin-selective absorption in high temperature, which enables perfect absorption at resonant frequency for one spin state of light, and a little loss for the other, resulting in a significant absorption circular dichroism (CD). The CD can be actively manipulated by ambient temperature (i.e., conductivity of VO2). Importantly, spin-encoded near-field imaging of letters and quick response codes are achieved using the CD effect of VO2 resonators and their enantiomers. The image contrast decreases with the reduction of ambient temperature and disappears at room temperature, which enables thermal-control electromagnetic encrypted imaging and hiding. This work provides a route for the development of tunable chiroptical systems, information encryption technologies, and temperature-control imaging devices.
摘要：
A fluorescent magnetic chitosan-based hydrogel (FMCH) incorporating Amino-Functionalized Fe3O4 nano-particles (AF-Fe3O4 NPs) and cellulose nanofibers (CNFs) modified with carbon dots (CDs) was successfully synthesized via the crosslinking method. The FMCH was used as an adsorbent for removing Cr (VI) from aqueous solution and it exhibited encouraging adsorption performance for Cr (VI). The composition and structure of FMCH were characterized and its Cr (VI) sorption performance was evaluated. The results demonstrated that this hydrogel had 3D porous structures and a higher adsorption ability of Cr (VI). The maximum adsorption capacity of this hydrogel was measured to be 212.1 mg/g at 25 degrees C and pH 5.0. The performance of the FMCH in Cr (VI) adsorption was evaluated through a contrast experiment with the normal chitosan hydrogel without CNFs and AF-Fe3O4 NPs. The effect of the initial concentration of Cr (VI) and contact time were also evaluated. The results confirmed that the adsorption isotherm was according to the Freundlich model, and the adsorption kinetics followed the pseudo-second-order model. Furthermore, as a fluorescent sensor for Cr (VI), the detection sensi-tivity and selectivity were examined. The quantitative detection of Cr (VI) was achieved in the linear range of 20-800 mg/L. Meantime, the mechanism for highly efficient adsorption and detection of FMCH for Cr (VI) was analysed by FTIR and XPS. These results showed that the excellent sorption and sensing abilities of Cr (VI) may be mainly attributed to the porous structures which provided many active sites and ion transport channels and the additional AF-Fe3O4 NPs and CNFs modified with CDs improving the sorption ability of Cr (VI) and providing a rapid visual response to Cr (VI). It showed that the FMCH can be widely used for Cr (VI) detection and removal in wastewater.
摘要：
A compressible miscible displacement problem is modeled by a nonlinear coupled system with partial differential equations in porous media. A two-grid algorithm of a combined mixed finite element and discontinuous Galerkin approximation is proposed based on the Newton iteration method. The error estimate in
$$H^1$$
-norm for concentration and the error estimate in
$$L^2$$
-norm for velocity are derived. It is shown that an asymptotically optimal approximation rate with the two-grid algorithm can be achieved if
$$h = O(H^{2})$$
is satisfied, where H and h are mesh sizes of the coarse grid and the fine grid, respectively. Numerical experiments indicate that the two-grid algorithm is effective, which coincides the theoretical analysis.
通讯机构：
[Wu, LJ ] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.
摘要：
A Pd-catalyzed multicomponent cross-coupling of allyl esters with alkyl bromides to synthesize allylic sulfones by using K(2)S(2)O(5) as a connector is first reported. The reaction displays a broad range of substrate generality along with excellent functional group compatibility and produces the products with high regioselectivity (only E). Furthermore, the biologically active molecules with a late-stage modification, including aspirin, menthol, borneol, and estrone, are also highly compatible with the multicomponent cross-coupling reaction. Mechanistic studies indicate that the process of SO(2) insertion into the C-Pd bond was involved in this transformation.
摘要：
Novel bifunctional thiophene-based COFs were constructed according to Schiff base reaction between tetrakis(4-aminophenyl)-ethane and 2,5-thiophenedicarboxaldehyde/ thieno[3;2-b]thiophene-2,5-dicarboxaldehyde. The loading of N/S heteroatoms in the skeleton not only take the COFs abundant functional groups, but also elevate the stability of the functional groups, and avoid the blocking of the pores from the post-functionlization of functional groups. The thiophene-based COFs all showed good crystalline structure, high Brunauer–Emmett–Teller (BET) surface area (SBET), pore volume (Vtotal), and N/S content, indicative of the COFs good performance in Hg2+ adsorption and I2 vapor capture. Especially, the COF-S1, which showed high SBET of 2133 m2/g and Vtotal of 1.672 cm3/g, exhibited a relative high I2 vapor capacity of 7.74 g/g. Although COF-S2 showed lower SBET (1430 m2/g) and Vtotal (1.186 cm3/g), the higher N/S content make COF-S2 higher Hg2+ adsorption capacity of 834 mg/g. The COFs also showed outstanding adsorption selectivity and good recyclability. This work provides guidance for the design and preparation of multi-functional adsorbents.
摘要：
A series of reddish-orange emitting Ca2InNbO6:Sm3+ (CINO:Sm3+) phosphors for white light-emitting diodes (w-LEDs) were synthesized using a high-temperature solid-state technique. The synthesized CINO:Sm3+ phosphors are pure phases with monoclinic structures. The optimal Sm3+ doping concentration is 0.02 mol, and concentration quenching is due to the dipole-dipole interaction. Upon 407 nm excitation, the as-prepared CINO:Sm3+ phosphors exhibited strong reddish-orange emission around 602 nm, attributed to the 4G5/2 -> 6H7/2 transition of Sm3+. Surprisingly, the CINO:Sm3+ phosphors revealed an abnormal thermal quenching (ATQ) phenomenon, and when the temperature of the phosphors was raised to 380 K, their emission intensity increased by more than 15%. The CINO:0.02Sm3+ phosphor had a high color purity (98.9%) and reddish-orange chromaticity coordinates (0.608, 0.388). Meanwhile, the manufactured w-LED demonstrated a good color rendering index (Ra = 93), decent CCT (5752 K), and Commission International de l ' Eclairage (CIE) chromaticity coordinates (0.327, 0.335). The experimental results demonstrated the su-periority of the CINO:Sm3+ phosphors in w-LEDs.(c) 2022 Elsevier B.V. All rights reserved.
