Publications by authors named "Xuejun Xu"
Article Synopsis
- Alkali metals are essential for improving the efficiency of flexible CuZnSn(S, Se) (CZTSSe) solar cells, but current methods of incorporating them are ineffective compared to rigid solar cells.
- A new method for alkaline incorporation has been developed that allows better control of alkali content and distribution in the absorber layer, improving film quality.
- This innovative approach led to a record efficiency of 11.88% for flexible CZTSSe solar cells, the highest achieved without using noble metal doping, showcasing a significant advancement in solar cell technology.
Purpose: To analyze the application of 'instrument and equipment surface cleaning and disinfection' in hospitals based on standardization and the management of cleaning and disinfection information systems.
Methods: Employees and all cleaning and disinfected instruments and equipment from 56 inpatient departments in our hospital were selected as the subjects of observation. The period before the intervention (January 2023) was designated as the control group, while the period after the intervention (July 2023) was designated as the study group.
Article Synopsis
- Flexible CuZnSn(S,Se) (CZTSSe) solar cells are gaining attention for their potential in various applications, but face issues with back interface problems when using Mo foil as a substrate.
- A new method involving substrate polishing and UV-ozone treatment enhances the quality of the CZTSSe film and improves the interface quality, leading to better mechanical stability and efficient carrier collection.
- As a result, the solar cell efficiency increased significantly from 4.94% to 10.32%, while also improving the bending durability of the cell.
It is still critical to prepare a high-quality absorber layer for high-performance Cu2ZnSnSe4 (CZTSe) multi-component thin film solar cell. The gas pressure during the selenization process is commonly referred to as the pressure of inert gas in the tube furnace, while the exact selenium partial pressure is difficult to be controlled. Therefore, the grain growth under different selenium partial pressures cannot be made clear, and the film quality cannot be controlled as well.
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- The study investigates the genomic and immune characteristics of lung adenocarcinoma (LUAD) with a lepidic growth pattern (LP+A) to understand its prognostic implications and treatment options.
- Researchers analyzed data from multiple databases and performed whole-exome sequencing on a domestic cohort of LUAD samples to gather insights.
- Results showed that LP+A is associated with favorable disease-free survival, higher rates of EGFR mutations, lower tumour mutation burden, and an immune profile suggesting targeted therapy could be more effective than immunotherapy for this subtype.
Article Synopsis
- Approximately 86% of patients with spinal dural arteriovenous fistulas (SDVAFs) see improvement after surgery, but 12%-55.8% experience late deterioration despite this initial progress.
- A study analyzed data from 105 patients to identify factors contributing to this late deterioration, finding that those undergoing microsurgery had a significantly lower risk compared to those receiving endovascular treatment.
- Additionally, patients with severe neurological dysfunction before surgery were at a higher risk for late deterioration, while those with mild dysfunction had a similar risk to those with moderate dysfunction.
Article Synopsis
- * A discovered peptide, SjDX5-271, promotes M2 macrophage polarization and protects mice from liver IRI, but its effectiveness is lost when macrophages are removed.
- * SjDX5-271 works by inhibiting the TLR4/MyD88/NF-κB signaling pathway, reducing inflammation in IRI, and suggests potential new treatments for IRI and related immune diseases.
Article Synopsis
- * Combining locoregional and systemic treatments helps shrink tumors and sometimes makes them operable, marking a promising development in patient outcomes.
- * However, there are still challenges in determining who should undergo surgery, how to create effective treatment plans, and when to operate, requiring ongoing research and refinement in clinical approaches.
Article Synopsis
- The text discusses a new method for creating enantiomerically enriched tetrahydronaphthalen-1-ols, which are a specific kind of organic compound.
- The synthesis involves a two-step process: alkylation using hydrogen borrowing and asymmetric transfer hydrogenation with ammonium formate, achieving high yields and good selectivity.
- The resulting compounds can be further modified into complex molecules, showcasing their potential applications in various fields.
Background: Intramedullary Spinal Cord Abscess (ISCA) is an uncommon infectious disease of the central nervous system. Since its first report in 1830, there have been very few documented cases associated with it. Here, we present a case of ISCA with cerebral abscess caused by Klebsiella pneumoniae.
View Article and Find Full Text PDFAcoustically induced dressed states of long-lived erbium ions in a crystal are demonstrated. These states are formed by rapid modulation of two-level systems via strain induced by surface acoustic waves whose frequencies exceed the optical linewidth of the ion ensemble. Multiple sidebands and the reduction of their intensities appearing near the surface are evidence of a strong interaction between the acoustic waves and the ions.
View Article and Find Full Text PDFRecently, there will be more than 4.62 billion social media users worldwide. A large number of users tend to publish personal emotional dynamics or express opinions on social media.
View Article and Find Full Text PDFSolution method provides a low-cost and environmentally friendly route for the fabrication of Cu ZnSn(S,Se) (CZTSSe) thin-film solar cells. However, uncontrollable quality of the CZTSSe absorber layer will severely limit the device's performance. In this study, it is find that the thickness and the quality of the formed precursor is not stable because of the variation of the viscosity of the precursor solution.
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- * Issues such as lot-to-lot variability and changes in stationary phase chemistry can affect the reliability of RPLC methods, leading to inconsistent results in practical applications.
- * The study investigated how the Hydrophobic Subtraction Model (HSM) could help explain variations in selectivity, particularly focusing on the selectivity differences between cis-trans isomers, revealing that the HSM may not fully account for these disparities.
Article Synopsis
- Regulatory T cells (Tregs) are important in managing autoimmune and inflammatory diseases, and parasitic helminths can help induce Tregs, presenting a potential therapeutic strategy.
- In this study, a specific peptide (SjDX5-53) was identified from Schistosoma japonicum egg extracts, which enhances Treg production and function while suppressing dendritic cell activation.
- SjDX5-53 demonstrated promising results in mouse models by protecting against autoimmune colitis and psoriasis, underscoring its potential as a new treatment derived from helminth biology.
Aims: We investigated the clinical implications and molecular features of TLS in stage I lung adenocarcinoma (LUAD).
Methods: We retrospectively reviewed the clinicopathological characteristics of 540 patients with p-stage I LUAD. Logistic regression analysis was applied to determining the relationships between clinicopathological features and the presence of TLS.
Increasing the fill factor (FF) and the open-circuit voltage (V ) simultaneously together with non-decreased short-circuit current density (J ) are a challenge for highly efficient Cu ZnSn(S,Se) (CZTSSe) solar cells. Aimed at such target in CZTSSe solar cells, a synergistic strategy to tailor the recombination in the bulk and at the heterojunction interface has been developed, consisting of atomic-layer deposited aluminum oxide (ALD-Al O ) and (NH ) S treatment. With this strategy, deep-level Cu defects are converted into shallower V defects and improved crystallinity, while the surface of the absorber is optimized by removing Zn- and Sn-related impurities and incorporating S.
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- * Traditional SiN-based waveguides have been limited by center-symmetric light pumping, which has prevented effective utilization of nonlinearity, but this research addresses that challenge.
- * Through numerical simulations, the researchers demonstrated that by intentionally offsetting the spatial position during excitation, they were able to improve signal-to-noise ratio (SNR) significantly and achieve a broader, flatter bandwidth.
Article Synopsis
- - Stroke is a major health concern, often linked to carotid atherosclerotic plaques, but how vascular health factors like arterial stiffness and endothelial dysfunction relate to these plaques is not well understood.
- - A study involving 991 subjects with carotid plaques and 1170 without found that those with plaques had higher arterial stiffness (measured by cf-PWV) and lower endothelial function (measured by RHI), with diabetes, hypertension, male gender, age, and smoking being major risk factors.
- - The findings suggest that using both RHI and cf-PWV measurements could enhance the detection and assessment of carotid plaques and their severity, particularly in individuals with diabetes and hypertension.
It is known that schistosome-derived antigens induce innate and adaptive immune responses that are essential for the formation of hepatic immunopathology. Here, we screened and synthesized four peptides derived from () heat shock protein 90α (Sjp90α-1, -2, -3, and -4), which is widely expressed in adults and eggs of the genus and induces remarkable immune reactions. To define the antigenicity of these peptides, we stimulated splenocytes with peptides, and the results showed that only the Sjp90α-1 peptide could predominately induce the activation of dendritic cells (DCs) and macrophages as well as alter the proportion of follicular helper T (Tfh) cells.
View Article and Find Full Text PDFPersistent Hemodynamic Depression After Carotid Artery Stenting: A Review and Update.
Vasc Endovascular Surg
May 2022
Article Synopsis
- * Carotid endarterectomy (CEA) is the traditional treatment for severe blockages in the internal carotid artery, while carotid artery stenting (CAS) has been proposed as a viable alternative due to advancements in medical technology.
- * This review focuses on the emerging knowledge regarding persistent hemodynamic depression (PHD) after CAS, aiming to enhance understanding and potentially improve prognostic and therapeutic strategies.
Article Synopsis
- Researchers developed a silicon-nitride waveguide that generates a wide 2.6-octave supercontinuum spectrum from 400-2500 nm and creates third-harmonic light.
- They used specialized 5-mm-long deuterated SiNWs with low-loss and converters to enhance visible light intensity.
- A novel carrier-envelope-offset (CEO) locking method was demonstrated using this setup, which is simpler and more stable than traditional techniques involving nonlinear fiber and crystals.
Article Synopsis
- Helminth infections, particularly from Schistosoma japonicum, may help protect against obesity and improve insulin sensitivity by influencing immune responses in the body.
- A unique population of regulatory B cells (Bregs) was identified in infected mice, which showed the ability to produce the anti-inflammatory cytokine IL-10 and alleviate obesity-related inflammation.
- CD9 was found to be an important marker for these IL-10 producing Bregs, enhancing their efficacy in regulating metabolic disorders by promoting protective immune cells while reducing harmful ones.