3,326,754 results match your criteria: "China; Beijing National Research Center for Information Science and Technology[Affiliation]"

Blue light emitted by commercial white light-emitting diodes (WLEDs) in the 440-470 nm range poses ocular health risks with prolonged exposure. Effective filtration is crucial for health-conscious lighting, but traditional filters often cause color distortion by completely removing blue emission. In this study, we address this challenge by synthesizing carbon dots (CDs) with strong absorption at 460 nm and bright cyan emission at 485 nm, featuring a photoluminescence quantum yield of 65% and a narrow full width at half-maximum of 30 nm.

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Objective: To review current knowledge of the various processes of programmed cell death and their roles in immunoregulation in periodontitis.

Methods: Relevant literature in the PubMed, Medline, and Scopus databases was searched, and a narrative review was performed. Programmed cell death and the regulation of its various pathways implicated in periodontal infection were reviewed.

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Template-Thermally Induced Phase Separation-Assisted Microporous Regulation in Poly(lactic acid) Aerogel for Sustainable Radiative Cooling.

Biomacromolecules

January 2025

National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.

Herein, an eco-friendly and degradable poly(lactic acid) aerogel was prepared by combining a poly(ethylene glycol) template material with thermally induced phase separation. Due to the tailored pore size introduced by the template material, the aerogel exhibits high solar reflectance (92.0%), excellent thermal emittance (90.

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Background: This study evaluates the efficacy of gabexate mesylate thermosensitive in-situ gel (GMTI) in the treatment of beagle grade III pancreatic trauma (PT) with the assistance of contrast-enhanced ultrasound (CEUS) and investigates its mechanism of action.

Methods: A grade III PT model consisting of 15 beagle dogs with severed main pancreatic ducts was created and treated with cephalic vein injection of gabexate mesylate (GM) (1.54 mL/10 kg, TID) and peripancreatic injection of GMTI (4.

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Extracting uranium from nuclear wastewater is vital for environmental and human health protection. However, despite progress in uranium extraction, there remains a demand for an optimized adsorbent with improved capability, efficiency, and selectivity. To bridge this gap, 1,2,3,4-butane tetracarboxylic acid (BTCA)-modified MIL-101 was synthesized through a simple hydrothermal reaction between amino-modified MIL-101 (MIL-101-NH) and BTCA.

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Asymmetric Photoredox Catalytic Minisci-Type Reactions of α-Bromide Amides.

Org Lett

January 2025

Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.

An asymmetric photoredox catalytic Minisci-type reaction between α-bromide amides and imine-containing azaarenes has been successfully developed. This catalyst system employs a chiral phosphoric acid alongside 3DPAFIPN as a photosensitizer. The reaction produces a diverse array of valuable amides, featuring azaarene-substituted tertiary carbon stereocenters at the β-position, in high yields (up to 85%) and good to excellent enantioselectivities (up to >99% enantiomeric excess (ee)).

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Spinal cord injury (SCI) remains a formidable challenge in biomedical research, as the silencing of intrinsic regenerative signals in most spinal neurons results in an inability to reestablish neural circuits. In this study, we found that neurons with low axonal regeneration after SCI showed decreased extracellular signal-regulated kinase (ERK) phosphorylation levels. However, the expression of dual specificity phosphatase 26 (DUSP26)─which negatively regulates ERK phosphorylation─was reduced considerably in neurons undergoing spontaneous axonal regeneration.

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3D disordered fibrous network structures (3D-DFNS), such as cytoskeletons, collagen matrices, and spider webs, exhibit remarkable material efficiency, lightweight properties, and mechanical adaptability. Despite their widespread in nature, the integration into engineered materials is limited by the lack of study on their complex architectures. This study addresses the challenge by investigating the structure-property relationships and stability of biomimetic 3D-DFNS using large datasets generated through procedural modeling, coarse-grained molecular dynamics simulations, and machine learning.

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Unveiling a Tunable Moiré Bandgap in Bilayer Graphene/hBN Device by Angle-Resolved Photoemission Spectroscopy.

Adv Sci (Weinh)

January 2025

School of Physical Science and Technology, ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai, 201210, P. R. China.

Over the years, great efforts have been devoted in introducing a sizable and tunable band gap in graphene for its potential application in next-generation electronic devices. The primary challenge in modulating this gap has been the absence of a direct method for observing changes of the band gap in momentum space. In this study, advanced spatial- and angle-resolved photoemission spectroscopy technique is employed to directly visualize the gap formation in bilayer graphene, modulated by both displacement fields and moiré potentials.

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Biomolecular Microneedle Initiates FeO/MXene Heterojunction-Mediated Nanozyme-Like Reactions and Bacterial Ferroptosis to Repair Diabetic Wounds.

Adv Sci (Weinh)

January 2025

Department of Urology, Institute of Urology, Cancer Precision Diagnosis and Treatment and Translational Medicine Hubei Engineering Research Center, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China.

Reactive oxygen species (ROS) play a dual role in wound healing. They act as crucial signaling molecules and antimicrobial agents when present at moderate levels. However, excessive levels of ROS can hinder the healing process for individuals with diabetes.

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Organizational Principles of the Primate Cerebral Cortex at the Single-Cell Level.

Adv Sci (Weinh)

January 2025

CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.

The primate cerebral cortex, the major organ for cognition, consists of an immense number of neurons. However, the organizational principles governing these neurons remain unclear. By accessing the single-cell spatial transcriptome of over 25 million neuron cells across the entire macaque cortex, it is discovered that the distribution of neurons within cortical layers is highly non-random.

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Monomer compounds from natural products are the major source of active pharmaceutical molecules, which provide great opportunities for discovering of new drugs. However, natural products contain a large number of rather complex compounds. It is difficult to obtain high-purity monomer compounds from complex natural products.

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The past decade witnessed a surge in discoveries where biological systems, such as bacteria or living cells, inherently portray active polar or nematic behavior: they prefer to align with each other and form local order during migration. Although the underlying mechanisms remain unclear, utilizing their physical properties to achieve controllable cell-layer transport will be of fundamental importance. In this study, the ratchet effect is harnessed to control the collective motion of neural progenitor cells (NPCs) in vitro.

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A Contracted Channel Droplet Reinjection Chip-Based Simple Integrated ddpcr System for SARS-CoV-2 and H1N1 Detection.

Anal Chem

January 2025

CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, China.

Droplet microfluidics is a powerful method for digital droplet polymerase chain reaction (ddPCR) applications. However, precise droplet control, bulky peripherals, and multistep operation usually required in droplet detection process hinder the broad application of ddPCR. Here, a contracted channel droplet reinjection chip is presented, where droplets can be self-separated and detected one by one at intervals.

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The herbal sitz bath formula, as a complementary therapy, effectively alleviates postoperative wound pain and accelerates healing time in patients with perianal abscesses. To investigate its mechanism of action, this study conducted 16S rRNA gene sequencing and bioinformatics analysis on wound exudate samples from patients after perianal abscess surgery. Patients were randomly divided into two groups: one receiving the herbal sitz bath as an adjunctive therapy and the other without this adjunctive therapy.

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NanoTrackThera Platform for Real-Time, In Situ Monitoring of Tumor Immunotherapy and Photothermal Synergistic Efficacy.

Small

January 2025

College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, P. R. China.

Cancer is one of the leading causes of death worldwide, posing a significant threat to human health. Although immunotherapy has shown promise in cancer treatment, its efficacy is often compromised by tumor immune evasion, which hinders treatment outcomes. Therefore, combining immunotherapy with other therapeutic approaches to enhance its effectiveness has become an increasingly accepted strategy in clinical practice.

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High-Performance Proton Exchange Membrane with Vertically Aligned Montmorillonite Nanochannels.

Small

January 2025

Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.

The traditional perfluorosulfonic acid proton exchange membrane is crucial for proton exchange membrane fuel cells, but its high cost has impeded broader commercialization. In this study, a novel concept of a cost-effective and stable vertically aligned polydopamine-intercalated montmorillonite membrane (VAPMM) is introduced. 2D nanochannels formed within the lamellar structure of polydopamine-coated montmorillonite nanosheets provide a significant stable in-plane proton conductivity of 0.

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Ethylene-Mediated Production and Emission of Limonene Influence Brown Planthopper Preference for Rice Plants.

J Agric Food Chem

January 2025

Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Volatile organic compounds (VOCs) play a key role in plant communication with other organisms in the natural environment. However, the regulatory role of the phytohormone ethylene in volatile production in plants remains unclear. In this study, we demonstrated that the application of an ethylene precursor and amplification of ethylene signaling make rice plants more attractive to brown planthopper (BPH) females for feeding and oviposition.

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Modulating Electronic Spin State of Perovskite Fluoride by Ni─F─Mn Bond Activating the Dynamic Site of Oxygen Reduction Reaction.

Small

January 2025

Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China.

Establishing the relationship between catalytic performance and material structure is crucial for developing design principles for highly active catalysts. Herein, a type of perovskite fluoride, NHMnF, which owns strong-field coordination including fluorine and ammonia, is in situ grown on carbon nanotubes (CNTs) and used as a model structure to study and improve the intrinsic catalytic activity through heteroatom doping strategies. This approach optimizes spin-dependent orbital interactions to alter the charge transfer between the catalyst and reactants.

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A comprehensive strategy, including spectroscopic, molecular simulation, proteomics, and bioinformatics techniques, was employed to investigate a novel triazole, 5-(4-methoxyphenyl)-1-phenyl-1H-1,2,3-triazole, its interactions with high-abundance blood proteins, and identification of low-abundance proteins. The binding constants and thermodynamic parameters of the triazole to two high-abundance blood globular proteins, human serum albumin, and human immunoglobulin G (HIgG), were obtained by spectroscopic techniques and computational chemistry. The two-dimensional gel electrophoresis in combination with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was employed to isolate and identify differentially expressed low-abundance proteins in human blood serum samples following exposure to the triazole.

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Nanoplastics, emerging as pervasive environmental pollutants, pose significant threats to ecosystems and human health due to their small size and potential toxicity. However, detecting trace levels of nanoplastics remains challenging because of limitations in the current analytical methods. Herein, we propose a method that combines superhydrophobic enrichment with SERS analysis for detecting trace nanoplastics in aqueous environments.

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Nano-Metal-Organic Frameworks Isolated in Mesoporous Structures.

Adv Mater

January 2025

School of Chemistry and Chemical Engineering, Testing Center, Yangzhou University, Yangzhou, 225009, P. R. China.

As an alternative to bulk counterparts, metal-organic framework (MOF) nanoparticles isolated within conductive mesoporous carbon matrices are of increasing interest for electrochemical applications. Although promising, a "clean" carbon surface is generally associated with poor compatibility and weak interactions with metal/ligand precursors, which leads to the growth of MOFs with inhomogeneous particle sizes on outer pore walls. Here, a general methodology for in situ synthesis of eight nanoMOF composites within mesochannels with high dispersity and stability are reported.

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Objective: To evaluate the effects of hysterectomy for benign uterine tumors on subsequent ovarian reserve, sexual function, and lower urinary tract symptoms (LUTS).

Methods: The present study was a prospective longitudinal analysis that recruited patients aged 35-45 years who underwent simple hysterectomy without oophorectomy for symptomatic benign uterine tumors. Anti-Müllerian hormone (AMH) and serum sex hormone profiles, including follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol, progesterone, and total testosterone, were measured at four timepoints: before hysterectomy, and 3, 6, and 12 months postoperatively.

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The effective collection of interfacial tribo-charges and an increase in load voltage are two essential factors that improve the output energy of triboelectric nanogenerators. However, some tribo-charges are hardly collected through one or multiple integrated side electrodes based on corona discharge, and their load voltages are limited by air breakdown in adjacent electrodes. In this study, a dynamic quasi-dipole potential distribution model is proposed to systematically reveal the mechanisms of interfacial tribo-charge loss.

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Per- and polyfluoroalkyl substances (PFAS) are a widely used class of synthetic chemicals that pose a significant global environmental and health threat due to their persistent and bioaccumulation toxicity caused by strong C-F bonds in their structures. PFAS usually exist in trace concentrations in environmental water bodies, which poses great challenges for environmental analysis. In this study, environmentally friendly cellulose was modified with polyaniline through in situ oxidative polymerization, and used as the filter paper for solid-phase extracting 23 PFAS in water.

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