Publications by authors named "Zhiguo Sun"

One of the most significant challenges of luminescent materials is the thermal quenching (TQ) at high temperature. Understanding the correlation between crystal structure variation and photoluminescence (PL) quenching is significant to achieve anti-thermal quenching (anti-TQ) phosphors. Herein, we unveil a universal principle governing switchable TQ and anti-TQ behaviors in zero-dimensional (0D) organic-inorganic hybrid manganese bromides.

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Article Synopsis
  • The study investigates how adjusting the nonplanar metal coordination environment can affect the spin state of transition metal-based catalysts, particularly focusing on iron (Fe) in a tetrahedral arrangement altered by phosphorus (P) atoms.
  • As the number of P atoms increases, the spin magnetic moment of the Fe atoms decreases significantly, indicating a linear relationship between P coordination and spin state properties.
  • A strong correlation is found between the spin states of the Fe catalysts and their efficiency in catalyzing the oxygen reduction reaction, with an optimal activity at a medium spin state of 19% yielding a notable half-wave potential of 0.92 V.
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Background: Manual planning of scans in clinical magnetic resonance imaging (MRI) exhibits poor accuracy, lacks consistency, and is time-consuming. Meanwhile, classical automated scan plane positioning methods that rely on certain assumptions are not accurate or stable enough, and are computationally inefficient for practical application scenarios. This study aims to develop and evaluate an effective, reliable, and accurate deep learning-based framework that incorporates prior physical knowledge for automatic head scan plane positioning in MRI.

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Obeticholic acid (OCA), a farnesoid X receptor (FXR) agonist with favorable effects on fatty and glucose metabolism, has been considered the leading candidate drug for nonalcoholic steatohepatitis (NASH) treatment. However, its limited effectiveness in resolving liver fibrosis and lipotoxicity-induced cell death remains a major drawback. Ferroptosis, a newly recognized form of cell death characterized by uncontrolled lipid peroxidation, is involved in the progression of NASH.

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Article Synopsis
  • Understanding the dealloying process is essential for creating effective alloy catalysts for the oxygen reduction reaction (ORR), but the specific steps involved are not fully understood.
  • Using X-ray absorption fine structure spectroscopy, researchers studied the dealloying of a two-dimensional ordered alloy called PtTe, which is known for its strong ORR performance.
  • The study finds that as Pt transforms structurally before Te is completely removed, a defect-rich Pt catalyst is formed, significantly improving ORR activity compared to standard commercial Pt/C catalysts.
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  • The study presents a method for creating a core-shell catalyst with a high-index Pt shell and a PtCu intermetallic core, enhancing the efficiency of oxygen reduction reactions without high temperatures.
  • Using surfactant effects and solvent-ligand interactions, the catalyst is formed through a self-assembly process that directly fabricates the desired structure.
  • The catalyst demonstrates a high performance with a half-wave potential of 0.911 V and maintains its effectiveness even after 15,000 cycles, largely due to improved electronic interactions that stabilize key reaction intermediates.
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In order to meet the requirements of tertiary oil recovery technology in a low-permeability, dense, and high-salt reservoir, gaseous SiO nanoparticles were modified with trichloro(octyl)silane and aminopropyl triethoxysilane by interface protection modification, and amphiphilic Janus-SiO nanoparticles with hydrophobic carbon chain and hydrophilic amino group were prepared. The basic properties of amphiphilic nanoparticle dispersion were evaluated by surface interfacial tension and wettability tests, and the oil displacement effect of amphiphilic nanoparticle dispersion was investigated. The results show that the size distribution of Janus-SiO nanoparticles with n-octyl as the hydrophobic carbon chain and amino group as the hydrophilic headgroup is uniform, and they have good dispersion in mineralized water.

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Cleavage of Amyloid precursor protein (APP) by the β-site amyloid precursor protein cleaving enzyme 1 (BACE1) is the rate-limiting step in the production of amyloid-β (Aβ) synaptotoxins. The siRNA-mediated silencing to attenuate the expression of BACE1 to ameliorate cognitive dysfunction in mice had been investigated. To improve therapeutic gene delivery to the central nervous system, cationic copolymer poly(ethylene glycol)-b-poly[N-(N'-{N''-[N'''-(2-aminoethyl)-2-aminoethyl]-2-aminoethyl}-2-aminoethyl)aspartamide]-cholesterol was synthesized, then RVG29 and Tet1 peptides were exploited as ligands to construct a dual-targeting brain gene delivery polyion complex (Tet1/RVG29-PIC).

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Overexpression of has been implicated in the pathogenesis of synucleinopathies, particularly Parkinson's disease (PD) and dementia with Lewy bodies (DLB). While PD and DLB share some clinical and pathological similarities, each disease presents distinct characteristics, including the primary affected brain region and neuronal type. We aimed to develop neuronal-type-specific -targeted epigenome therapies for synucleinopathies.

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Scalp angiosarcoma (SA) is rare, accounting for <1% of soft tissue sarcomas, with a high degree of malignancy, a high recurrence rate and a poor prognosis. The best treatment strategy is uncertain. Therefore, it is essential to continuously refine treatment strategies and improve the prognosis of patients.

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Ferroptosis is a newly discovered form of regulatory cell death characterized by excessive iron-dependent lipid peroxidation. In the past decade, significant breakthroughs have been made in comprehending the features and regulatory mechanisms of ferroptosis, and it has been confirmed that ferroptosis plays a pivotal role in the pathophysiological processes of various diseases, including tumors, inflammation, neurodegenerative diseases, and infectious diseases. The pancreas, which is the second largest digestive gland in the human body and has both endocrine and exocrine functions, is a vital organ for controlling digestion and metabolism.

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Objective: To investigate the association between metabolic syndrome (MetS) and its components and the risk of developing urologic cancers.

Methods: This study included 101,510 observation subjects from May 2006 to December 2007. The subjects received questionnaires and were subjected to clinical and laboratory examinations to collect data on baseline population characteristics, waist circumference (WC), blood pressure (BP), blood glucose, blood lipids, lifestyle, and past disease history.

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Background: The commercial coronary computed tomographic angiography artificial intelligence (CCTA-AI) platform has made great progress in clinical application. However, research is needed to elucidate the current stage of commercial AI platforms and the role of radiologists. This study compared the diagnostic performance of the commercial CCTA-AI platform with that of a reader based on a multicenter and multidevice sample.

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Background: Breast cancer is a serious threat to female health, and its incidence varies with education level (EL). In the present study, the association between EL and the risk of developing female breast cancer was investigated.

Methods: From May 2006 to December 2007, 20,400 observation subjects in Kailuan Cohort received questionnaires and were subjected to clinical examinations for data collection on baseline population characteristics, height, weight, lifestyle and past disease history.

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Acoustic graphene plasmons (AGPs) in a graphene-dielectric-metal structure possess extreme field localization and low loss, which have promising applications in strong photon-matter interaction and integrated photonic devices. Here, we propose two kinds of one-dimensional crystals supporting propagating AGPs with different topological properties, which is confirmed by the Zak phase calculations and the electric field symmetry analysis. Moreover, by combining these two plasmonic crystals to form a superlattice system, the super-modes exist because of the coupling between isolated topological interface states.

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The construction and understanding of synergy in well-defined dual-atom active sites is an available avenue to promote multistep tandem catalytic reactions. Herein, we construct a dual-hetero-atom catalyst that comprises adjacent Cu-N and Se-C active sites for efficient oxygen reduction reaction (ORR) activity. Operando X-ray absorption spectroscopy coupled with theoretical calculations provide in-depth insights into this dual-atom synergy mechanism for ORR under realistic device operation conditions.

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This study was aimed to analyze the application value of the filtered back-projection (FBP) reconstruction algorithm of computed tomography (CT) images in laparoscopic-assisted distal gastrectomy. In this study, 56 patients with gastric cancer were selected as research subjects and randomly divided into the control group (CT-guided laparoscopic radical gastrectomy) and the observation group (CT-guided laparoscopic radical gastrectomy with the FBP reconstruction algorithm), with 28 patients in each group. Fourier transform and iterative reconstruction were introduced for comparison, and finally, the postoperative curative effect and adverse events were compared between the two groups.

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Dynamic displacement plays an essential role in structural health monitoring. To overcome the shortcomings of displacement measured directly, such as installation difficulty of monitoring devices, this paper proposes a smart reconstruction method, which can realize real-time intelligent online reconstruction of structural displacement. Unlike the existing approaches, the proposed algorithm combines the improved mode superposition methods that is suitable for complex beam structures with the Kalman filtering approach using acceleration and strain data.

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Patient-derived xenografts (PDXs) and patient-derived organoids (PDOs) have been shown to model clinical response to cancer therapy. However, it remains challenging to use these models to guide timely clinical decisions for cancer patients. Here, we used droplet emulsion microfluidics with temperature control and dead-volume minimization to rapidly generate thousands of micro-organospheres (MOSs) from low-volume patient tissues, which serve as an ideal patient-derived model for clinical precision oncology.

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Glioma stem cells (GSCs) and their complex microenvironment play a crucial role in the high invasion of cancer and therapeutic resistance and are considered to be the most likely cause of cancer relapse. We constructed a biomimetic vehicle (LDL-SAL-Ang) based on a low density lipoprotein triggered by Angiopep-2 peptide and ApoB protein, to improve the transport of an anti-GSC therapeutic agent into the brain. The LDL-SAL-Ang showed significant inhabitation for GSC microsphere formation and induced the highest apoptotic rate in two types of GSCs.

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Objective: To investigate the expression of interleukin-17 (IL-17) in zoledronic acid combined with PVP technology for patients with postmenopausal osteoporotic vertebral compression fracture (OVCF) and its predictive value for relapse.

Methods: 101 OVCF patients treated in our hospital from April 2013 to January 2015 were collected as a research group and treated by zoledronic acid combined with PVP technology. 80 healthy people with physical examination were assigned to the control group.

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The Ca-based sorbent cyclic calcination/carbonation reaction (CCCR) is a high-efficiency technique for capturing CO from combustion processes. The CO capture ability of CaO modified with sodium humate (HA-Na) (HA-Na/CaO) in long-term calcination/carbonation cycles was investigated. The enhancement mechanism of HA-Na on CCCR was proposed and demonstrated.

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Heating under low solar radiation intensity is demonstrated to facilitate the cleaning of crude oil by the hydrophobic nanocomposite adsorbents of reduced graphene oxide (RGO) melamine sponge (MS@RGO) foams. The heat generated by the irradiation reduces the viscosity of the crude oil, and consequently increases the oil-diffusion coefficient of the pores of the MS@RGO foams and speeds up the oil-sorption rate. Even under a solar radiation intensity as low as 2 kW m, the temperature of crude oil rapidly rises to 68 °C or higher within 10 min.

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Light has several advantages as the stimulus for a triggered drug release. Currently, the applications of phototriggered drug-release devices (PDDs) are largely limited by two factors: the limited tissue penetration and detrimental effects caused by excitation light (ultraviolet or visible light). To address this disadvantage, this study developed nanocomposites based on upconversion nanoparticles (UC), which could convert near-infrared light to ultraviolet-visible light and trigger drug release.

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Synopsis of recent research by authors named "Zhiguo Sun"

  • - Zhiguo Sun's recent research primarily focuses on advanced materials and innovative medical technologies, with significant contributions to electrocatalysis, machine learning for imaging, and targeted therapies for metabolic diseases and neurological conditions.
  • - Key findings include the manipulation of d-orbital configurations in iron-based electrocatalysts to enhance oxygen reduction efficiency and the development of a deep learning framework for automating magnetic resonance imaging, optimizing scan accuracy and consistency.
  • - Additional studies highlight novel therapeutic approaches addressing nonalcoholic steatohepatitis and ferroptosis, showcasing the potential of interdisciplinary strategies to improve treatment outcomes in hepatic and pancreatic diseases, as well as addressing cognitive impairments through gene delivery systems in neurological models.