Photodynamic therapy based on bismuth oxyiodide nanoparticles for nondestructive tooth whitening.

Achieving a desired whitening effect through short treatments without using peroxide and without compromising the integrity of tooth enamel remains a challenge in teeth whitening. Here, we developed a highly safe and efficient photodynamic therapy (PDT) strategy based on visible light-activated bismuth oxyiodide nanoparticles for nondestructive tooth whitening. The BiOI nanoparticles (NPs) exhibited efficient photocatalytic activity owing to their narrow band gap, effectively harnessing the broad spectrum of visible light to generate ample electrons and holes.

Three-dimensional donor-acceptor conjugated porous polymers based on metal-porphyrin and triazine for highly effective photodegradation of organic pollutants in water.

Three-dimensional donor-acceptor (D-A) type conjugated porous polymers (CPPs) was designed and synthesized via imine condensation of copper tetraaminoporphyrin (CuTAPP) as donor and 1,3,5-tris-(4-formyl phenyl) triazine (TFPT) as acceptor, named as CuPT-CPP. The CuPT-CPP possesses a high specific surface area (73.7 m/g) and excellent photophysical properties.

Anthracene and tetraphenylsilane based conjugated porous polymer nanoparticles for sensitive detection of nitroaromatics in water.

Conjugated porous polymers (CPPs) are a kind of promising sensing materials for the detection of nitroaromatic compounds, but their sensing applications in aqueous media are limited because of their poor dispersity or solubility in water. In this study, we prepared anthracene and tetraphenylsilane based CPPs named PSiAn by conventional Suzuki coupling and Suzuki-miniemulsion polymerization, respectively. The structure, morphology and porosity of the CPPs were characterized by Fourier Transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (H NMR), transmission electron microscope (TEM) and N sorption isotherm, respectively.

Highly Efficient and Reusable PI/TiO Organic-Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight.

Herein, a series of polyimide (PI)/titanium dioxide (TiO) organic-inorganic flexible composite microfibers with high photocatalytic performance and good reusability were prepared by combining electrospinning technology and a hydrothermal method. Under simulated sunlight, the photocatalytic characteristics of the as-prepared PI nanofibers, TiO nanorods, and PI/TiO microfibers were evaluated with photocatalytic degradation of Rhodamine B (RhB) solution. Among the tested samples, PI/TiO-3 mL hydrochloric acid-160 °C-14 h (PI/TiO-3-160-14) (100%) exhibited a superior photocatalytic degradation rate compared to pure PI (84.

PacBio Full-Length Transcriptome of a Tetraploid Provides Insights into the Evolution of Cavefish.

is a second-class nationally protected wild animal in China. As one of the cavefish, has strong adaptability to harsh subterranean environments. In this study, we used PacBio SMRT sequencing technology to generate a first representative full-length transcriptome for .

Theoretical study on the superconductivity of graphene-like TMB (TM = Cr, Fe and Co) monolayer and its potential anchoring and catalytic properties for lithium-sulfur batteries.

In recent years, two-dimensional materials have aroused enormous interest owing to their superior electrochemical performance, abundant exposed active sites, high specific surfaces and so on. Unlike many stable allotropes, honeycomb hexagonal borophene is kinetically unstable. In this study, we introduce transition metal atoms (Cr, Fe and Co) to stabilize honeycomb hexagonal borophene, forming stable graphene-like TMB (TM = Cr, Fe and Co) monolayers.

First-principles study on α/β/γ-FeB monolayers as potential gas sensor for HS and SO.

Context: The adsorptions of toxic gases SO and HS on 2D α/β/γ-FeB monolayer were investigated using density functional theory calculations. To analyze the interaction between gas molecule HS/SO and α/β/γ-FeB monolayer, we calculated adsorption energy, adsorption distance, Mullikan charge, charge density difference, band structure, the density of states, work function, and theoretical recovery time. The adsorption energies show that HS/SO is chemisorbed on α/β-FeB while HS/SO is physiosorbed on γ-FeB monolayer.

Comprehensive transcripts analysis based on single-molecule real-time sequencing and Illumina sequencing provides insights into the mining of Toll-like receptor family in Schizothorax lissolabiatus.

Schizothorax lissolabiatus is an economically important cold-water fish species in southwestern China. Because of water pollution and habitat destruction, the number of wild populations has dramatically decreased. In this study, we used PacBio single-molecule real-time (SMRT) sequencing and Illumina sequencing to generate the first full-length transcriptome and transcriptome, respectively.

A new cavefish of Sinocyclocheilus (Teleostei: Cypriniformes: Cyprinidae) from the Nanpanjiang River in Guizhou, China.

A new species, Sinocyclocheilus xingyiensis, is described based on specimens collected from a karst cave in Guizhou Province, China. The authors used an integrated taxonomic approach, including morphological and molecular data, to identify the new species as a member of the Sinocyclocheilu angularis group, and it can be distinguished from all other members of this group by a combination of the following features: two pairs of long barbels and long pectoral fins, 42-46 lateral-line scales, 7 (13-14) on outer (inner) side of the first gill arch and 35 (14-15 + 4 + 16 - 17) vertebrae. Phylogenetic analyses based on the cytochrome b (cyt b) gene fragment suggest that S.

Photodynamic therapy based on porphyrin-based metal-organic frameworks.

Porphyrins and their derivatives have excellent photophysical and electrochemical properties, which have attracted great interest in the fields of catalysis, biosensing, gas storage, solar cells, biomedicine, However, the inherent limitations, such as self-quenching, weak absorption at biological spectral windows and poor photochemical stability, severely hinder their applications in biomedicine, especially in the field of photodynamic therapy (PDT). In recent years, metal-organic frameworks (MOFs) have received increasing attention as a class of hybrid porous coordination polymers assembled from metal ions/secondary building units (SBUs) and organic linkers. By introducing porphyrins into MOFs the encapsulation in the pores as well as grafting on the surface to form porphyrin@MOFs or using porphyrins as organic linkers to construct porphyrin-MOFs, not only the unique properties of porphyrins and MOFs are combined, but also the limitations of porphyrins are overcome and their applications are facilitated in the biomedicine field.

Effect of Cathodal Transcranial Direct Current Stimulation for Lower Limb Subacute Stroke Rehabilitation.

Methods: A pilot double-blind and randomized clinical trial. Ninety-one subjects with subacute stroke were treated with cathodal/sham stimulation tDCS based on CGR (physiotherapy 40 min/d and occupational therapy 20 min/d) once daily for 20 consecutive working days. Computer-based stratified randomization (1 : 1) was employed by considering age and sex, with concealed assignments in opaque envelopes to ensure no allocation errors after disclosure at the study's end.

Climate Change Influences the Population Density and Suitable Area of (Hemiptera: Pentatomidae) in China.

is the main pest of in South China. The relationship between climate change and outbreak of , and the current and future distribution of are unknown. This study aimed to confirm the effect of climate on population density and the attacked bamboo rate of , using field survey data from 2005 to 2013 in Huzhou, Zhejiang Province, and to reveal the potential distribution of under current and future climate conditions using the MaxEnt model.

Financial Management of Listed Companies Based on Convolutional Neural Network Model in the Context of Epidemic.

The goal of financial management is to manage the purchase and sale of assets, the rational financing of funds, the management of cash flow in operations, and finally, the reasonable distribution of company profits in a certain task situation, which is simply the management of the "three statements" of the enterprise. The core issue of the financial mechanism is how to choose a centralized or decentralized management model, which requires the company to consider the internal and external environment, and according to the development of the company, the quality of employees and business characteristics of various factors, in order to make the best choice of the company's financial management model. Therefore, in the context of the epidemic, this article conducts research related to the financial management of listed companies based on convolutional neural network models (radial basis neural network, generalized regression neural network, wavelet neural network, and fuzzy neural network).

Thermo- and Light-Responsive Polymer-Coated Magnetic Nanoparticles as Potential Drug Carriers.

A series of thermo- and light-responsive copolymers of poly (-isopropylacrylamide) (PNIPAM) and 6-[4-(4-methoxy phenyl azo)-phenoxyl-hexyl methacrylate) (AzoMA) (PNIPAM-b-PAzoMA) were synthesized reversible addition-fragmentation chain transfer (RAFT) radical polymerization. The resulting copolymers had a narrow molecular weight distribution range of 1.06-1.

First-principle investigation of CO, CH, and CO adsorption on Cr-doped graphene-like hexagonal borophene.

It is important for life safety and scientific research to design new sensing materials for detecting CO, CH, and CO from the environment. We theoretically designed a new Cr-doped graphene-like hexagonal borophene (CrB) as potential sensor material for these gases. Carrying out first-principle density-functional calculations, we calculated the adsorption energy, band structure, adsorption distance, charge transfer, charge density difference, density of states, and partial density of states of CO, CH, and CO gas molecules absorbed on CrB monolayer.

Monitoring of Hydrogen Polysulfide a NIR-Excitable Reversible Fluorescent Probe Based on Upconversion Luminescence Resonance Energy Transfer.

Hydrogen polysulfide (HS), derived from hydrogen sulfide (HS), has attracted increasing attention, which is suggested to be the actual signal molecule instead of HS in physiological and pathological processes. Reversible detection of HS through a NIR-excitable fluorescence probe is an effective means to understand its functions but is quite challenging. Herein, we reported a NIR-excitable ratiometric nanoprobe for the reversible detection of HS based on luminescence resonance energy transfer principle with upconversion nanoparticles as the energy donor and an organic molecule, SiR1, as the energy acceptor and reversible recognition unit of HS.

Thermo-Responsive ZnPc--TiO--PNIPAM Photocatalysts Sensitized with Phthalocyanines for Water Purification under Visible Light.

A novel thermo-responsive 2,9(10),16(17),23(24)-tetrakis[(3-carboxyacrylamide) phthalocyaninato] zinc (ZnPc)--TiO--poly(-isopropylacrylamide) (PNIPAM) photocatalyst modified with phthalocyanines was prepared. The photocatalyst exhibited thermo-responsive properties due to the introduction of PNIPAM, which performed recovery for reuse above the lower critical solution temperature (LCST, about 26 °C). ZnPc--TiO--PNIPAM effectively expanded the light response range to the visible light region and inhibited the recombination of electron-hole pairs, which enhanced the performance of the photocatalyst.

2D phosphorus carbide as promising anode materials for Na/K-ion batteries from first-principles study.

First-principles calculations based on density functional theory were used to investigate the electrochemical performance of monolayer γ-PC for Na- and K-ion batteries. Molecular dynamics simulations indicate that the monolayer γ-PC have the thermal and dynamic stability. A substantial charge transfer from the Na/K atoms to the γ-PC sheet enhances the electrical conductivity of γ-PC.

Eu- and Tb-Based Coordination Complexes of Poly(-Isopropyl,-methylacrylamide---dimethylacrylamide) Copolymer: Synthesis, Characterization and Property.

This contribution reports the syntheses, structural analyses and properties of europium (Eu)- and terbium (Tb)-based coordination complexes of poly(-isopropyl,-methylacrylamide---dimethylacrylamide) (poly(iPMAm--DMAm)) copolymer, named as poly-Eu(III) and poly-Tb(III), respectively. In greater detail, poly(iPMAm--DMAm) is first prepared by random copolymerization of -isopropyl,-methylacrylamide (iPMAm) and -dimethylacrylamide (DMAm) via group transfer polymerization (GTP). Next, poly(iPMAm--DMAm) is used as the polymer matrix for chelating with Eu and Tb cations at its side amide groups, to produce poly-Eu(III) and poly-Tb(III).

DNA Barcode Identification of Fish Products from Guiyang Markets in Southwestern People's Republic of China.

Abstract: Global fish consumption is increasing in tandem with population growth, resulting in the dilemma of overfishing. Overfished high-value fish are often replaced with other fish in markets. Therefore, the accurate identification of fish products in the market is important.

One-Pot Facile Synthesis of Noble Metal Nanoparticles Supported on rGO with Enhanced Catalytic Performance for 4-Nitrophenol Reduction.

In this study, reduced graphene oxide (rGO)-supported noble metal (gold, silver, and platinum) nanoparticle catalysts were prepared via the one-pot facile co-reduction technique. Various measurement techniques were used to investigate the structures and properties of the catalysts. The relative intensity ratios of in rGO/Au, rGO/Ag, rGO/Pt, and GO were 1.

Aggregation-induced fluorescent response of urea-bearing polyphenyleneethynylenes toward anion sensing.

A π-conjugated urea-bearing phenyleneethynylene polymer () was rationally designed by the Sonogashira coupling condensation reaction and had been demonstrated to have a unique fluorescent quenching effect for the optical detection of all determined anions, especially for CN. The fluorescent emission of was significantly quenched upon adding CN, together accompanied with a continuous red shift of the emission peak from 442 to 464 nm with the cyanide concentration increased from 0 to 1.0 mM.