Development of coatings to minimize unwanted surface adsorption is extremely important for their use in applications, such as sensors and medical implants. Self-assembled monolayers (SAMs) are an excellent choice that nonspecific because they can be uniform have a very high coverage. Another equally characteristic stability. In the present study, both bonding mechanism stability stearic acid SAMs on two aluminum oxides (single-crystal C-plane oxide (sapphire) amorphous (alumina))...

A facile and one-pot straightforward methodology has been developed to prepare a novel class of imidazo[1,5-a]pyridines. key role played by ammonium acetate in chemoselectivity examined.

Neurosymbolic artificial intelligence (AI) is an emerging branch of AI that combines the strengths symbolic and sub-symbolic AI. Symbolic based on idea can be represented using semantically meaningful rules representations, while deep learning (DL), or sometimes called AI, emerges from collective behavior neurons are connected to each other. A major drawback DL it acts as a "black box", meaning predictions difficult explain, making testing & evaluation (T&E) validation verification (V&V)...

COVID-19 is a large-scale contagious respiratory disease that has spread across the world in 2020. Therefore, low-cost, fast, and easily available solution needed to provide diagnosis curb outbreak. According recent studies, one of main symptoms coughing. The goal this research effort develop method for automatic by detecting cough during recorded conversations. composed five modules: sound extraction, feature detection, classification, diagnosis. extracts relevant features from audio signal...

Bacterial cell-surface polysaccharides are involved in various biological processes and have attracted widespread attention as potential targets for developing carbohydrate-based drugs. However, the accessibility to structurally well-defined polysaccharide or related active oligosaccharide domains remains challenging. Herein, we describe an efficiently stereocontrolled approach first total synthesis of a unique pentasaccharide repeating unit containing four difficult-to-construct...

In this study, the total synthesis of osajin, scandenone and their analogues have been accomplished. The key synthetic steps include aldol/intramolecular iodoetherification/elimination sequence reactions a Suzuki coupling reaction to assemble tricyclic core, chemoselective propargylation Claisen rearrangement obtain natural compounds. addition, we also designed synthesized twenty-five product analogues. All compounds were screened for anti-inflammatory activity against tumor necrosis...

Immobilization of chiral catalysts, which are composed precious metals and costly ligands, offers an economic environmental-friendly strategy. However, several challenges remain, including inferior activity selectivity compared to...

Two new classes of two-photon absorbing Y-shaped molecules have been developed to possess an imidazole–thiazole core and a stilbene-type conjugation pathway with either nitro or sulfonyl as terminal electron-accepting group.

ADVERTISEMENT RETURN TO ISSUEPREVArticleControlled synthesis and spectroscopic characterization of multifunctional hybrid silazane/silylamine preceramic telechelic oligomersKe Feng Yitbarek H. MariamCite this: Macromolecules 1991, 24, 16, 4729–4732Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https://pubs.acs.org/doi/10.1021/ma00016a039https://doi.org/10.1021/ma00016a039research-articleACS PublicationsRequest reuse...

Abstract Bacterial cell‐surface polysaccharides are involved in various biological processes and have attracted widespread attention as potential targets for developing carbohydrate‐based drugs. However, the accessibility to structurally well‐defined polysaccharide or related active oligosaccharide domains remains challenging. Herein, we describe an efficiently stereocontrolled approach first total synthesis of a unique pentasaccharide repeating unit containing four difficult‐to‐construct...

Visual tracking is an essential process for performing automated cell manipulation tasks. However, Real-time accurate in FluidFM challenging due to probe occlusion during manipulation. This study presents a correlation filtering-based method real-time, high-precision position of cells and probes. In this method, target template update strategy proposed realize under occlusion, which abandons the use pixel values area reduces interference model learning. Cell experiments were carried out...

Atomic force microscopy (AFM) generally scans the sample surface following a raster pattern signal, which contains discontinuities at turning points and frequencies beyond mechanical bandwidth of scanning stage. Consequently, high speed brings distortions to resulting image. This paper describes non-raster method based on Cassini oval pattern. In this method, by adopting pattern, input control signals two axes scanner are replaced sinusoid-like smooth signals, thereby reducing harmonic...

Abstract The detailed characterization of multifunctional hybrid organosilazane/organosilylamine telechelic oligomers by IR and 1 H, 13 C 29 Si NMR spectroscopy in one two dimenions has been undertaken. specific oligomers, comprising NH/NH 2 or SiCl functionalities depending on the monomer feed‐ratio, were prepared from mono‐ di‐functionally reacted dichlorodimethylsilane (DDS) mono‐, di‐, tri‐ tetra‐functionally ethylenediamine (EDA). Varying feed‐ratio afforded control microstructures...

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Beginning in Dec 2019, a novel coronavirus, designated SARS-CoV-2, has caused an international outbreak of respiratory illness termed COVID-19. The workers the FangCang hospital have to work for more than 8 h and is high strength. Furthermore, protect health prevent serious cross-infection, they need wear isolation equipment when working hospital. These characteristics increase risk cardiac arrest (CA), which seriously endangers lives workers.We participated rescue patient at first-line...