Publications by authors named "Fei Wei"
Observing chemical reactions in complex structures such as zeolites involves a major challenge in precisely capturing single-molecule behavior at ultra-high spatial resolutions. To address this, a sophisticated deep learning framework tailored has been developed for integrated Differential Phase Contrast Scanning Transmission Electron Microscopy (iDPC-STEM) imaging under low-dose conditions. The framework utilizes a denoising super-resolution model (Denoising Inference Variational Autoencoder Super-Resolution (DIVAESR)) to effectively mitigate shot noise and thereby obtain substantially clearer atomic-resolved iDPC-STEM images.
View Article and Find Full Text PDFSymmetry is a motif featured in almost all areas of science, and understanding the mechanism of symmetry breaking is challenging. Similar to mutations that disrupt symmetry in evolution, defects in materials offer insight into symmetry breaking. Here, we investigate symmetry in intragenerational mutations and symmetry breaking in transgenerational mutations in the evolutionary growth system of carbon nanotubes (CNTs).
View Article and Find Full Text PDFBackground: The gay affirmative practice (GAP) scale is an effective tool for evaluating the beliefs and behaviors of health care professionals toward gay and lesbian clients.
Aim: This study aimed to examine the reliability and validity of the GAP scale among Chinese nurses.
Methods: A quantitative cross-sectional study was conducted to evaluate the Chinese version of the GAP (C-GAP) scale after translation and cross-cultural adaptation and to examine its psychometric characteristics.
Both the physicochemical properties of catalytic material and the structure of loaded catalyst layer (CL) on gas diffusion electrode (GDE) are of crucial importance in determining the conversion efficiency and product selectivity of carbon dioxide reduction reaction (CORR). However, the highly reducing reaction condition of CORR will lead to the uncontrollable structural and compositional changes of catalysts, making it difficult to tailor surface properties and microstructure of the real active species for favored products. Herein, the interlayer microenvironment of copper-based layered double hydroxides (LDHs) is rationally tuned by a facile ink solvent engineering, which affects both the surface characters and microstructure of CL on GDE, leading to distinct catalytic activity and product selectivity.
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- Climate change negatively impacts cotton production, making it essential to develop drought and salinity-resistant varieties.
- Researchers identified 16 homologs of the Arabidopsis JUB1 gene in cotton, with GhJUB1_3-At showing significant increases in drought-tolerant plants.
- Transgenic lines with GhJUB1_3-At demonstrated improved drought and salt stress tolerance compared to wildtypes, indicating it is influenced by interactions with other regulatory genes.
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- The research aimed to investigate urushiol as a cross-linking agent to help remineralize etched dentin and prevent collagen breakdown, with the goal of enhancing bond strength at the resin-dentin interface.
- Urushiol primers were prepared in different concentrations and applied to acid-etched dentin samples, which were then analyzed for changes in mineral content and mechanical properties using various advanced techniques.
- Results showed that the 0.7% ethanol urushiol primer significantly improved dentin remineralization, bond strength, and reduced the activity of harmful enzymes, indicating its potential effectiveness in dental applications.
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- Understanding the intricate structures of metal-organic frameworks (MOFs) is crucial for grasping their properties and potential applications.
- A low-dose imaging technique was successfully used to visualize the atomic structures of the MIL-125 framework, revealing unexpected rotational configurations of titanium-oxygen (Ti-O) nodes that differ from earlier predictions based on X-ray diffraction.
- The study further detailed the variations in node rotation within MIL-125 and explored related defects through real-space imaging, paving the way for discovering new structural phenomena in other porous materials.
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- The study addresses the low durability of composite resin restorations caused by weak resin dentin bonding due to hydrophilic components in adhesives, which lead to issues like water absorption and reduced bond strength.
- Researchers developed a new hydrophobic dentin adhesive by replacing part of a common resin component with a light-curable urushiol monomer, thoroughly testing its properties against a standard adhesive.
- Results show that the new adhesive, with 20% urushiol, demonstrated enhanced hydrophobicity, low cytotoxicity, strong mechanical properties, and improved bonding strength, indicating its potential for better restoration durability.
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- Oral lichen planus (OLP) can lead to oral squamous cell carcinoma (OSCC), and SRY-box transcription factor 11 (Sox11) is highlighted as a key factor in this progression.
- Research shows that higher levels of Sox11 and reduced methylation of its promoter are linked to worse outcomes for patients with OLP-associated OSCC.
- Sox11 influences cancer cell behavior by promoting growth and survival through the PI3K/AKT pathway, suggesting it could serve as a useful biomarker for monitoring the risk of progression from precancerous lesions to cancer.
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- - The text discusses high-entropy materials (HEMs), which are made of five or more elements, and their growing importance in electrocatalysis due to their unique properties derived from their diverse compositions.
- - It emphasizes the crucial role of microstructure in determining the catalytic performance and mechanisms of these materials, suggesting that how HEMs are structured can significantly affect their effectiveness in energy conversion.
- - The review highlights recent advancements in the synthesis and characteristics of HEMs with various morphologies (1D, 2D, and 3D), showcasing examples from the past five years to encourage further research in this field.
The penetration rate (PR) of tunnel boring machines (TBMs) is often used to evaluate tunneling performance and predict construction period costs. However, most penetration rate (PR) prediction models are based on a single specific project, which leads to poor universality of the models.Furthermore, the value of the cutter head speed set for the prediction of the construction period in the survey and planning stages depends on manual experience and lacks theoretical guidance.
View Article and Find Full Text PDFThe repair of large bone defects due to trauma, disease, and infection can be exceptionally challenging in the elderly. Despite best clinical practice, bone regeneration within contemporary, surgically implanted synthetic scaffolds is often problematic, inconsistent, and insufficient where additional osteobiological support is required to restore bone. Emergent smart multifunctional biomaterials may drive important and dynamic cellular crosstalk that directly targets, signals, stimulates, and promotes an innate bone repair response following age-related biological decline and when in the presence of disease or infection.
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- Bile acids (BAs) are important compounds influenced by both the host and gut microbiota, while nitrate (NO-N) pollution in aquatic environments has been shown to disrupt microbial communities.
- A study on Bufo gargarizans tadpoles exposed to NO-N revealed that it reduced beneficial bacteria involved in bile acid metabolism, leading to fewer protective bile acids and an increase in harmful ones.
- The research indicates that NO-N not only impacts bile acid transformations but also raises microbial virulence, posing significant health risks to amphibians due to its toxic effects.
The directional transformation of carbon dioxide (CO) with renewable hydrogen into specific carbon-heavy products (C) of high value presents a sustainable route for net-zero chemical manufacture. However, it is still challenging to simultaneously achieve high activity and selectivity due to the unbalanced CO hydrogenation and C-C coupling rates on complementary active sites in a bifunctional catalyst, thus causing unexpected secondary reaction. Here we report LaFeO perovskite-mediated directional tandem conversion of CO towards heavy aromatics with high CO conversion (> 60%), exceptional aromatics selectivity among hydrocarbons (> 85%), and no obvious deactivation for 1000 hours.
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- Community-associated and hospital-acquired bacterial infections pose significant global health challenges, exacerbated by ineffective standard disinfection methods on high-touch surfaces.
- Researchers developed a ceria-silver nanozyme that effectively eliminates harmful bacteria like Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus on both wet and dry surfaces by damaging their cellular structures.
- Mechanisms of action include the production of reactive oxygen species (like hydrogen peroxide) and electrostatic interactions, leading to bacterial respiration loss and eventual cell death, while showing lasting antibacterial effects in a real clinical setting.
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- Researchers identified 169 armadillo repeat (ARM) genes in upland cotton, categorizing them into 11 subfamilies based on phylogenetic analysis, highlighting the gene family's expansion through genome duplication.
- Expression studies indicate that the GhARM144 gene could negatively regulate cotton’s immune response against the plant pathogen Verticillium dahliae, potentially by affecting salicylic acid levels.
- GhARM144 interacts with another protein, GhOSM34, which appears to enhance resistance to V. dahliae; silencing this protein weakened cotton’s defense, suggesting a complex interplay in the plant's immune system.
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- By 2060, as the population ages, osteoporosis and fragility fractures are projected to rise, but currently, there are no definitive treatments available.
- This study investigates the effects of Pool 7 Compound 3 (P7C3) on preventing bone loss related to osteoporosis induced by ovariectomy (OVX), with promising results showing reduced bone degradation and weight gain.
- Findings indicate that P7C3 influences key biological pathways involved in inflammation and bone health, and alters gut microbiota, suggesting a new therapeutic approach to combat osteoporosis.
Article Synopsis
- * Sphingolipids, a type of bioactive lipid, influence various cellular processes and are linked to chronic inflammation and increased bone loss in conditions like aging and arthritis.
- * Research suggests that targeting sphingolipids could lead to new therapies for bone-related diseases, but understanding their complex biochemical roles remains a significant challenge in the field.
Objectives: To evaluate the effects of Nd:YAG laser irradiation on the microstructures of dentin surfaces and the long-term bond strength of dentin under simulated pulpal pressure.
Materials And Methods: Under simulated pulp pressure, 30 freshly extracted caries-free third molars were cut into 2-mm-thick dentin samples and then divided into five groups: the control and laser groups (93.3 J/cm; 124.
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- The study focuses on how the defined stacking structure of Ruddlesden-Popper (RP) interfaces affects the performance of lead-halide perovskite materials and devices.
- It employs a combination of advanced scanning transmission electron microscopy techniques to observe atomic structures in these complex nanocrystals, particularly the RP interfaces.
- Results reveal detailed insights into the local structures and interactions at these interfaces, which can enhance our understanding of the properties and behaviors of lead-halide perovskites.
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- Patient delay in seeking treatment for pulmonary tuberculosis (TB) in Yantai between 2013 and 2022 significantly contributes to increased morbidity and mortality, with a median delay time of 28 days and a delay rate of 69.5%.
- Factors influencing patient delay included age, occupation, origin of the patient, area of residence, and presence of other health conditions, with older age groups and specific job statuses being associated with longer delays.
- Logistic regression analysis identified risk factors for delayed care, including ages 20-39, 40-59, and 60+, domestic or unemployed occupations, being part of a mobile population, and positive pathogenic test results.
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- The study focuses on lead iodide (PbI) in lead-halide perovskite (LHP) materials, highlighting its dual role as both a beneficial additive and a defect site affecting performance and stability.
- Advanced imaging techniques, specifically low-dose integrated differential phase contrast (iDPC) and high-angle annular dark field (HAADF)-STEM, were used to visualize Pb precipitation in various LHP compositions (like CsPbI and CsPbBr) under different environmental conditions.
- The research successfully captured the size and position of Pb precipitates during an in situ heating process, providing insights into the mechanisms behind Pb precipitation and its impact on the material's properties.
The structural exploration of three-dimensional covalent organic frameworks (3D COFs) is of great significance to the development of COF materials. Different from structurally diverse MOFs, which have a variety of connectivity (3-24), now the valency of 3D COFs is limited to only 4, 6, and 8. Therefore, the exploration of organic building blocks with higher connectivity is a necessary path to broaden the scope of 3D COF structures.
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- Universal stress proteins (USPs) are vital for helping plants cope with environmental stressors, but research on their role in cotton (Gossypium species) is limited.
- This study identified and classified USP genes in Gossypium hirsutum into six subfamilies, with their expansion linked to genetic duplications, especially from allotetraploidization events.
- The study found that certain GhUSPs are significantly activated during various abiotic stress conditions, providing insights that could aid in breeding more resilient cotton varieties in the future.
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- Pressure can significantly influence atom distances and electron bonding, affecting how materials bond and behave.
- The study introduces tiny NbSe flat tubes formed through self-pressurization during the breakdown of NbSe in carbon nanotubes, leading to high internal pressures that prevent slippage.
- Enhanced electrical properties were observed in these tubes, indicating stronger electron correlations and a unique state of matter, proposing a new method for creating materials with tailored electronic interactions.