Stylosanthes guianensis (Aublet) Sw. is an important pasture legume in tropical and subtropical countries. Chilling injury of S. a serious problem cultivated areas. An experiment was conducted under controlled conditions to study the effect abscisic acid (ABA) on its relation antioxidant systems chilling stress. seedlings were sprayed with 10 mg L −1 ABA or water. One day later, plants transferred 10°C growth chamber grown for 7 d 12‐h photoperiod at 160 μmol m −2 s photosynthetic photon...

Under the condition of time variant RFI, limitation training sample size causes great performance degradation conventional Radio Frequency Interference (RFI) suppression algorithm based on eigen-subspace projection (ESP) method. A novel RFI method using iterative adaptive approach (IAA) and orthogonal subspace (OSP) is proposed for synthetic aperture radar (SAR). Dispensing with parametric search model order estimation, estimates power spectrum adaptively iteratively, utilizing few samples...

The redistribution of cropland to areas higher elevation in China has long affected agricultural development and could seriously threaten national food security. However, there is currently little research reported on this phenomenon, which may limit the improvement protection policies. To fill gap, we analyzed spatiotemporal characteristics driving mechanisms increased during period 1980–2020. average by 17.38 m from 1980 2020. gravity center area moved northwest 81.00 km 51.47 km,...

The heterodinuclear AuNi(CO)4- complex is scrutinized in the gas phase by using mass-selected anionic photoelectron velocity-map imaging spectroscopy conjunction with theoretical computations. ground state of characterized to have an Au-Ni bonded structure, consisting AuCO fragment attached Ni center Ni(CO)3 fragment. Comprehensive quantum chemical studies reveal that at equilibrium structure features a decentralized bonding scenario, where exotic metal-metal σ may be equally well described...

Although layered oxides of LiNixCoyMnzO2 (NCM, x + y z = 1) are promising high energy density cathode materials, they still face significant challenges such as the cracks caused by anisotropic strain and poor structural thermal stability upon building high-performance rechargeable lithium-ion batteries (LIBs) for scale-up industrialization. Under this circumstance, La Mg elements theoretically experimentally introduced into NCM to modify primary particles synergistically lattice orientation...

Under the condition of wideband interference (WBI) with characteristics good time-frequency concentration but high nonstationarity, limited time width window function in short-time Fourier transform (STFT) causes instantaneous frequency resolution and leads to great performance degradation conventional WBI suppression algorithm based on filtering (TFF) method. A novel method using iterative adaptive approach (IAA) orthogonal subspace projection (OSP) is proposed for synthetic aperture radar...

As one of the significant serum cytokines, platelet-derived growth factor-BB (PDGF-BB) is a crucial protein biomarker overexpressed in human life-threatening tumors, sensitive identification and quantification which are urgently desired but challenging. Herein we report novel core-shell nanoarchitecture consisting Cu-based metal-organic frameworks (Cu-MOFs) covalent organic (denoted as TpBD-COFs), was used to prepare an aptasensor for detection (PDGF-BB). The central Cu-MOFs function signal...

The homoleptic heterodinuclear copper-nickel carbonyl anions CuNi(CO)n(-) (n = 2-4) were generated in a pulsed-laser vaporization source and investigated using photoelectron velocity-map imaging spectroscopy. electron affinities of CuNi(CO)2 (2.15 ± 0.03 eV), CuNi(CO)3 (2.30 CuNi(CO)4 (1.90 0.04 eV) deduced from the spectra. Theoretical calculations at B3LYP level carried out to elucidate structures electronic properties CuNi(CO)n(0/1-) 1-4) support experimental observations. Comprehensive...

The gas-phase heterodinuclear gold-nickel carbonyl AuNi(CO)

Exploring the unique catalytic properties of gold clusters associated with specific nano-architectures is essential for designing improved catalysts a high mass-specific activity.

Joint research of photoelectron velocity map imaging spectroscopy and density functional theory has been performed to probe the geometrical structures electronic properties for heterodinuclear iron-lead carbonyl cluster PbFe(CO)4(-), which serves as a monomer metal-metal bonded oligomer. The detachment PbFe(CO)4(-) is recorded at two different photon energies with rich spectral features. ground-state transition obtained 532 nm reveals broad vibrationally resolved band, corresponds lead-iron...

The heteronuclear metal oxide complexes are of great significance in heterogeneous catalytic oxidation CO. However, previous studies mainly focused on the composition oxide, charge state, support and active oxygen species, with little attention paid to adsorbed CO ligands. Herein, ligand-mediated reactivity niobium–nickel monoxide carbonyl has been successfully identified. NbNiO(CO)n– (n = 5–6) anions determined be O-bridged complexes. In contrast, 7–8) characterized η2-CO2-tagged crucial...

Peach branches is a by-product of peach industry. Making branch waste into organic fertilizer (PBOF) promising strategy ecological utilization. In this study, the effects PBOF on yield and quality fruit, chemical properties bulk soil, soil bacterial communities were investigated in orchard. The results showed that sugar/acid ratio two high-level treatments (SDH.4 SKR.4) was higher than no fertilization treatment (CK), but there significant difference compared to commercial (SYT.4). Moreover,...

Microvascular decompression is an etiological strategy for the therapy of trigeminal neuralgia (TN). Preoperative identification neurovascular compression, therefore, could have impact on determination appropriate treatment TN.To evaluate value contrast-enhanced and unenhanced three-dimensional (3D) time-of-flight (TOF) MR angiography in visualization relationship patients with TN.Thirty-seven unilateral TN underwent 3D TOF a 3.0-T system. Images were reviewed by radiologist blinded to...

Infrared spectra of the neutral dimethylamine-methanol cluster, DMA-CH3OH, were measured in spectral range 2800-3900 cm-1 using an infrared-vacuum ultraviolet (IR-VUV) scheme. Quantum chemical calculations and ab initio molecular dynamic (AIMD) simulations carried out to understand experimental features. Experimental theoretical results reveal coexistence N···HO O···HN hydrogen-bonded structures. AIMD show that methyl group methanol internally rotates around N···O axis, addressing effect...

Mucin 1 protein (MUC1) is a well-known tumor marker overexpressed in variety of human malignancies, and thus its highly selective sensitive detection significantly desired for clinical diagnostics. Herein, electrochemical MUC1 sensing platform has been fabricated based on copper-based metal-organic frameworks (Cu-MOFs) decorated with gold-platinum alloy nanoparticles (AuPt NPs). Besides serving as redox probe to avoid introducing extra media, the electroactive Cu-MOFs function catalysts...

The transition metal carbonyls are among the most important complexes in coordination chemistry. maximum number these is seven. Because cations Sc(+) and Y(+) have empty second outermost d orbital subshells, they can possibly bond eight CO ligands, forming 18-electron d(10)s(2)p(6) noble gas configuration. aim of this study to determine whether octacoordinate exist.The structures bonding M(CO)n(+) (M = Sc Y, n 7-9) were studied using Density Functional Theory (DFT) calculations with...

We report a joint experimental and theoretical study on heterodinuclear silver-nickel carbonyl clusters: AgNi(CO)n- AgNi(CO)n (n = 2, 3). The photoelectron spectra angular distribution provide information the electronic structures geometries of these complexes. Electron affinities AgNi(CO)2 AgNi(CO)3 are measured from velocity-map imaging to be 2.29 ± 0.03 2.32 eV, respectively. complementary calculations at B3LYP level Franck-Condon simulations performed establish their geometrical...

Background This study aims to investigate the underlying characteristics of spontaneous brain activity by analyzing volumes hippocampus and parahippocampal gyrus, as well fractional amplitude low-frequency fluctuation (fALFF) regional homogeneity (ReHo), in order differentiate between bipolar disorder (BD) unipolar depressive disorder. Methods A total 46 healthy controls, 58 patients with major (MDD), 61 BD participated underwent resting-state functional magnetic resonance imaging (rs-fMRI)...