A Conjugated Oligomer with Drug Efflux Pump Inhibition and Photodynamic Therapy for Synergistically Combating Resistant Bacteria.

High expression of drug efflux pump makes antibiotics ineffective against bacteria, leading to drug-resistant strains and even the emergence of "superbugs". Herein, we design and synthesize a dual functional o-nitrobenzene (NB)-modified conjugated oligo-polyfluorene vinylene (OPFV) photosensitizer, OPFV-NB, which can depress efflux pump activity and also possesses photodynamic therapy (PDT) for synergistically overcoming drug-resistant bacteria. Upon light irradiation, the OPFV-NB can produce aldehyde active groups to covalently bind outer membrane proteins, such as tolerant colicin (TolC), blocking drug efflux of bacteria.

Catalytic Assembly of Peptides Mediated by Complex Coacervates.

The assembly of peptides is generally mediated by liquid-liquid phase separation, which enables control over assembly kinetics, final structure, and functions of peptide-based supramolecular materials. Modulating phase separation can alter the assembly kinetics of peptides by changing solvents or introducing external fields. Herein, we demonstrate that the assembly of peptides can be effectively catalyzed by complex coacervates.

How traditional cultural load affects tourists' purchasing intention of tourist souvenirs.

Based on the previous studies on the impact of traditional culture on tourists' purchasing intentions, this study aims to further explore the mechanism and boundary conditions regarding the traditional cultural load in tourist souvenir packaging. Through seven simulated experiments (N = 3203), the impact of different degrees of traditional cultural load on tourists' purchasing intentions has been examined, with value perception, cultural identity, and purchase purpose, advancing the research in the field of traditional culture and tourism marketing. The findings provide insights for managers in the industry of tourism and souvenir marketing for their package design.

Palladium-Catalyzed Tandem Reaction of β-Ketonitriles with Arylboronic Acids and Dimethyl Sulfoxide: Application to Multicomponent Synthesis of Poly-Substituted Pyridines.

The Pd-catalyzed multicomponent tandem reaction of β-ketonitriles, arylboronic acids and DMSO was efficiently developed, enabling access to a variety of poly substituted pyridines. The protocol shows excellent chemoselectivity, generating nicotinonitriles or symmetrical tetrasubstituted pyridines under different conditions by tandem cyclization of enaminone intermediates with β-ketonitriles or enolates, respectively, and does not require extra ammonias. This method boasts notable advantages, such as the use of commercially available or easily prepared substrates, simple conditions, a broad substrate scope, and good functional group tolerance.

Determination of oxyphenisatine and its total ester derivatives content in fermented green plum by ultra performance liquid chromatography-tandem mass spectrometry.

Illegal additives such as oxyphenisatine and its esters are prevalent in the slimming food industry, necessitating a robust analytical method for their detection. This study presents a novel UPLC-MS/MS method for the rapid and accurate quantification of total oxyphenisatine levels in fermented green plum, following hydrolysis of its esters. An efficient ultrasonic extraction with a methanol and 0.

Behaviors and influencing factors of Chinese oncology nurses towards frailty care: A cross-sectional study based on knowledge-attitude-practice theory in 2024.

Background: The demand for frailty care is continuously increasing in hospitalized tumor patients with the aging of the population. Nurses are the primary care providers of hospitalized tumor patients with frailty but research on exploring their behavior and associated factors is limited. This study aims to describe the current situation of frailty care behaviors in oncology nurses and to explore the factors influencing frailty care behaviors.

Application and Mechanism of Action of a Ketogenic Diet in Antiepileptic Therapy.

Epilepsy is a chronic neurological disorder caused by abnormal discharges of neurons in the brain, which seriously affects the quality of life of patients. Although there are various drug treatments available, many epilepsy patients still experience seizures with the effect of drugs and develop refractory epilepsy. The ketogenic diet can treat drug-refractory epilepsy by regulating the body's metabolism and can enhance the quality of life by improving their cognition, behavior, and sleep quality.

Local Environment-Modulated f-f Transition in Unit-Cell-Sized Lanthanide Ultrathin Nanostructures.

The regulation of the f-f transition is the basis of utilizing the abundant optical properties of lanthanide (Ln), of which the key is to modulate the local environment of Ln ions. Here, we constructed Eu(III)-based unit-cell-sized ultrathin nanowires (UCNWs) with red luminescence and polymer-like behavior, which appears as an ideal carrier for regulating f-f transition. The f-f transition of Eu(III) in UCNWs could be precisely regulated through various ligands.

Structural Similarity in Natural Products Leading to Sample Misidentification: A Case Study of the Bisbenzylisoquinoline Alkaloids Oxyacanthine and Berbamine.

The similar structures of natural compounds and the absence of NMR data for commercial products raise the risk of misidentification. This work reports a case in which purchased samples labeled as "berbamine" from 14 suppliers are oxyacanthine (). The NMR data of all purchased samples were consistent.

Genome-Wide A → G and C → T Mutations Induced by Functional TadA Variants in .

The fusion expression of deoxyribonucleic acid (DNA) replication-related proteins with nucleotide deaminase enzymes promotes random mutations in bacterial genomes, thereby increasing genetic diversity among the population. Most previous studies have focused on cytosine deaminase, which produces only C → T mutations, significantly limiting the variety of mutation types. In this study, we developed a fusion expression system by combining DnaG (RNA primase) with adenine deaminase TadA-8e (DnaG-TadA) in , which is capable of rapidly introducing A → G mutations into the genome, resulting in a 664-fold increase in terms of mutation rate.

How to Identify Pesticide Targets?

Pesticides are essential in contemporary agriculture, as they improve crop yields and quality while safeguarding against pests. However, long-term heavy use of traditional pesticides has led to increased pest resistance, while these pesticides are often toxic and less selective, and may also have adverse effects on the environment and nontarget organisms. To solve this problem, it is important to find new targets for pesticide to develop more effective and environmentally friendly alternatives.

Preparation of Carbon Dots with High Fluorescence Quantum Yields and its Detection of Hg in Simulated Wastewater.

Fluorescent carbon quantum dots (CDs) have received widespread attention for their potential applications in optical sensing. Meanwhile, as the importance of mercury ion (Hg) detection in the environment, the exploration of Hg fluorescent nanosensor based on CDs with high quantum yield is particularly intriguing. Herein, nitrogen-doped carbon quantum dots (N-CDs) were prepared by microwave method using citric acid as carbon source and urea as nitrogen source, and glycerol as microwave solvent.

Long-Life Zinc Anodes via Molecular-Layer-Deposited Inorganic-Organic Hybrid Titanicone Thin Films.

Zinc-ion batteries (ZIBs) have consistently faced challenges related to the instability of the zinc anode. Uncontrolled dendrite growth, hydrogen evolution reaction (HER), and byproduct accumulation on the zinc anode severely affect the cycling life of ZIBs. Herein, inorganic-organic hybrid thin films of titanicones (Ti-based hydroquinone, TiHQ) were fabricated by molecular layer deposition (MLD) technology to modify the zinc metal anode.

Biomarkers.

Background: The structural brain alterations for subjective cognitive decline (SCD) and mild cognitive impairment (MCI) are poorly defined. We sought to characterize grey matter volume (GMV) and cortical thickness associated with SCD and MCI among rural-dwelling older adults in China.

Method: This population-based cross-sectional study included 1072 dementia-free participants derived from the brain MRI substudy of MIND-China in 2018-2020.

Cervical Defect Reconstruction Using Preexpanded Neck Flaps Transferred in a Scarf-wrapping Manner.

Objective: Cervical burn scar contractures can be repaired using many modalities, including skin grafts, pedicled and free flaps. Although preexpanded cervical flaps can provide a like-with-like reconstruction, a simple advancement transfer of the flaps often fails to achieve ideal outcomes. The authors aimed to introduce a method using the preexpanded cervical flaps transferred in a scarf-wrapping manner to repair neck defects.

β-Thioamide Sulfone Enabled Copper-Catalyzed Ring-Opening/Sulfonylation of Cyclopropenes: Access to Alkyl Aryl Sulfones.

Sulfone motifs play important roles in bioactive compounds and functional materials. The development of efficient methodologies for constructing sulfonyl-containing compounds has thus attracted considerable attention. Here, we introduce a protocol for the preparation of alkyl aryl sulfones under mild conditions.

Epidemiological Characteristics of Pathogens in Bronchoalveolar Lavage Fluid in Children With Lower Respiratory Tract Infections: A Retrospective Analysis.

Background: The COVID-19 pandemic has significantly altered the etiological spectrum and epidemiological characteristics of pediatric respiratory diseases, and a profound understanding of these changes is crucial for guiding clinical treatment. The purpose of this study is to analyze the etiological patterns and epidemiological features of pathogens in bronchoalveolar lavage fluid (BALF) from children with pediatric lower respiratory tract infections (LRTIs) after the COVID-19 pandemic, with the aim of providing effective therapeutic evidence for clinical practice.

Methods: This study enrolled pediatric patients diagnosed with LRTIs who were treated and underwent BALF pathogen detection at our hospital from June 1, 2023, to June 1, 2024.

Novel insights into the role of gut microbiota and its metabolites in diabetic chronic wounds.

Wounds in patients with diabetes present significant physical and economic challenges due to impaired healing and prolonged inflammation, exacerbated by complex interactions between microbes. Especially, the development and healing of diabetic foot ulcers (DFUs) remain an urgent clinical problem. The human gut harbors a vast microbial ecosystem comprising intestinal flora and their metabolic products.

Autophagy intersection: Unraveling the role of the SNARE complex in lysosomal fusion in Alzheimer's disease.

Autophagy is a fundamental cellular process critical for maintaining neuronal health, particularly in the context of neurodegenerative diseases such as Alzheimer's disease (AD). This review explores the intricate role of the SNARE complex in the fusion of autophagosomes with lysosomes, a crucial step in autophagic flux. Disruptions in this fusion process, often resulting from aberrant SNARE complex function or impaired lysosomal acidification, contribute to the pathological accumulation of autophagosomes and lysosomes observed in AD.

SNHG16 alleviates pulmonary ischemia-reperfusion injury by promoting the warburg effect through regulating MTCH2 expression: experimental studies.

Background: Pulmonary ischemia-reperfusion injury (PIRI) is a major cause of fatality post-lung transplantation. Though some long non-coding RNAs (lncRNAs) have been studied in acute lung injury (ALI), their effects on PIRI remain undefined. The present study aims to explore the underlying mechanism of small nucleolar RNA host gene 16 (SNHG16) in PIRI.

Advanced Dual-Mode Microfluidic Sensing Platform Based on Amphiphilic Polymer-Capped Perovskite Nanozymes Induced Photoelectrochemical Signal Amplification and Fluorescence Emission.

A novel dual-mode microfluidic sensing platform integrating photoelectrochemical (PEC) and fluorescence (FL) sensors was developed for the sensitive monitoring of heart fatty acid binding protein (h-FABP). First, BiVO/AgInS (BVAIS) composites with excellent photoelectric activity were synthesized as sensing matrices. The BVAIS heterojunction with a well-matched internal energy level structure provided a stable photocurrent.

Benzothiazolium salts as versatile primary alcohol derivatives in Ni-catalyzed cross-electrophile arylation/vinylation.

Herein, we report a Ni-catalyzed cross-electrophile coupling of aryl/vinyl halides with benzothiazolium salts derived from alcohols. Our findings demonstrate that primary alkyl benzothiazolium salts serve as effective C(sp)-O substrates, facilitating coupling with aryl and vinyl halides. This method not only enables the formal functionalization of primary alcohols but also provides experimental support for previously established sequential alcohol halogenation and Ni-catalyzed reductive coupling platforms.

cyclicpeptide: a Python package for cyclic peptide drug design.

The unique cyclic structure of cyclic peptides grants them remarkable stability and bioactivity, making them powerful candidates for treating various diseases. However, the lack of standardized tools for cyclic peptide data has hindered their potential in today's artificial intelligence-driven efficient drug design landscape. To bridge this gap, here we introduce a Python package named cyclicpeptide specifically for cyclic peptide drug design.

Facile synthesis of 2-sulfonylbenzothiazoles cascade SO-NCS addition and S-C(sp) coupling.

A new synthetic route to 2-sulfonylbenzothiazoles (BtsR) employing cascade SO-NCS nucleophilic addition and CuI-catalysed S-C(sp) coupling was developed. Structurally diverse BtsR molecules were readily afforded in high yields from the rapid and benign reaction of 2-iodoarylisothiocyanates with sodium sulfinates in DMSO, generally without the need for further column isolation.

Lattice Oxygen Redox Dynamics in Zeolite-Encapsulated CsPbBr Perovskite OER Electrocatalysts.

Understanding the oxygen evolution reaction (OER) mechanism is pivotal for improving the overall efficiency of water electrolysis. Despite methylammonium lead halide perovskites (MAPbX) have shown promising OER performance due to their soft-lattice nature that allows lattice-oxygen oxidation of active α-PbO layer surface, the role of A-site MA or X-site elements in the electrochemical reconstruction and OER mechanisms has yet to be explored. Here, it is demonstrated that the OER mechanism of perovskite@zeolite composites is intrinsically dominated by the A-site group of lead-halide perovskites, while the type of X-site halogen is crucial for the reconstruction kinetics of the composites.