Straw-Derived Activated Carbon Decorated with AgPO for Organic Pollutant Removal by a Circular Degradation Mechanism: Adsorption and Photocatalysis.

The escalating problem of water pollution has become an urgent concern, as it significantly undermines people's quality of life and overall public health. The increasing severity of water pollution represents a global challenge, with profound implications for human society. In this study, hydrothermal carbonization coupled with alkaline activation was utilized to repurpose barley straw into activated carbon (AC) as an absorbent.

Fiber Bragg grating displacement sensor based on synchronous deformation sensing for real-time monitoring of a tunnel lining.

A fiber Bragg grating (FBG) displacement sensor based on synchronous sensing is developed for real-time monitoring of a tunnel lining. The sensing principle and mechanical structure of the proposed sensor are analyzed and simulated, and its sensitization effectiveness and temperature compensation are verified. Equivalent model tests show that the sensor has a good linear sensitivity of 19.

In-fiber duplex optical antenna and its programmable spectral filter application: publisher's note.

This publisher's note contains corrections to Opt. Lett.47, 4937 (2022)10.

Wavelength-tunable noise-like fiber laser based on PbS quantum dot saturable absorber film.

A wavelength-tunable noise-like pulse (NLP) erbium-doped fiber laser incorporating PbS quantum dot (QD) polystyrene (PS) composite film as a saturable absorber (SA) is experimentally demonstrated. The wavelength tuning is implemented via a Lyot filter consisting of a segment of polarization-maintaining fiber (PMF) and a 45° tilted fiber grating. By adjusting the polarization state of the ring cavity, the laser can deliver NLP with a continuous wavelength-tunable range from 1550.

Diffraction characteristics of radiated tilted fiber grating and its spectrometer application.

We have numerically and experimentally presented the diffraction characteristics of radiated tilted fiber grating (RTFG) in terms of the spectrum, bandwidth, degree of polarization, angular dispersion, and temperature crosstalk. The theoretical and experimental results have shown that the polarization property, bandwidth, and dispersion of RTFG highly depended on the tilt angle of RTFG, and the RTFG has ultra-low temperature crosstalk. We have simulated the transmission spectrum of the RTFG with different tilt angles (25°, 31°, 38°, 45°, and 54°), in which the results show that the larger tilt angle has the wider bandwidth.

Intracavity birefringence-controlled GHz-tuning range passively harmonic mode-locked fiber laser based on NPR.

We experimentally demonstrate a harmonic-order controllable L-band Er-doped passively mode-locked fiber laser based on nonlinear polarization rotation (NPR). Distinct from all previous reports, we find that the intracavity birefringence is able to control the harmonic order of a passively mode-locked fiber laser. Experimentally, under a constant pump power of 704 mW, the harmonic order can be tuned from 113th to 39th monotonically by adjusting the polarization controller orientation only.

A novel reversed-phase and weak anion-exchange mixed-mode stationary phase based on horizontal polar-copolymerized approach for separation of small organic molecules and inorganic anions.

A novel silica-based reversed-phase/weak anion-exchange mixed-mode chromatography (MMC) stationary phase referred to as OTAS was synthesized based on the horizontal polar-copolymerized approach using trichlorooctadecylsilane (ODS) and (3-glycidyloxypropyl)trimethoxysilane (GPS) as ligands, and then followed by the reaction of epoxy group with diethylamine to introduce the tertiary ammonium functional group. The new stationary phase was characterized by instrumental analysis, and evaluated by separating the mixture of alkylbenzene homologues in reversed-phase mode and acidic organic compounds in ion-exchange chromatography mode, respectively. The results indicate that not only the baseline separation of 11 kinds of neutral and acidic organic compounds can be achieved successfully, but also 5 kinds of inorganic anions can be separated completely.

Preparation of a weak anion exchange/hydrophobic interaction dual-function mixed-mode chromatography stationary phase for protein separation using click chemistry.

In this study, 3-diethylamino-1-propyne was covalently bonded to the azide-silica by a click reaction to obtain a novel dual-function mixed-mode chromatography stationary phase for protein separation with a ligand containing tertiary amine and two ethyl groups capable of electrostatic and hydrophobic interaction functionalities, which can display hydrophobic interaction chromatography character in a high-salt-concentration mobile phase and weak anion exchange character in a low-salt-concentration mobile phase employed for protein separation. As a result, it can be employed to separate proteins with weak anion exchange and hydrophobic interaction modes, respectively. The resolution and selectivity of the stationary phase were evaluated in both hydrophobic interaction and ion exchange modes with standard proteins, respectively, which can be comparable to that of conventional weak anion exchange and hydrophobic interaction chromatography columns.

Ovarian tumor targeting of docetaxel-loaded liposomes mediated by luteinizing hormone-releasing hormone analogues. In vive distribution in nude mice.

Recent studies indicate that luteinizing hormone-releasing hormone (LHRH) analogues (LHRHa), like LHRH, are able to specifically bind to LHRH receptors which are highly expressed on the extracellular membrane of ovarian tumor cells. As a targeting moiety, LHRHa can mediate the ovarian tumor targeting of docetaxel-loaded liposomes. In our study, synthesized negatively charged cholesterol succinimide (CHS) was employed for the preparation of negatively charged docetaxel-loaded liposomes, with which the positively charged LHRHa is linked via electrostatic absorption.

[Research on thymopentin-loaded N-trimethyl chitosan nanoparticles administered through mouth].

Objective: To prepare a peroral thymopentin-loaded N-trimethyl chitosan chloride-nanoparticle (Tp5-TMC-NP) ,and observe the pharmacodynamic action when the Tp5-TMC-NP is taken by way of the mouth.

Methods: N-trimethyl chitosan chloride was first synthesized, and then Tp5-TMC-NP was prepared with the formulation technology optimized by the Central Composite Design. The influence of Tp5-TMC-NP on the ratio of CD4+/CD8+ of T-lymphocytes were determined by flow cytometer.

Preparation of a TK/GCV administration system mediated by transferrin modified pro-cationic liposomes.

Transferrin modified pro-cationic liposomes were prepared and used to investigate the effect of targeting therapeutic genes to human hepatoma carcinoma cells in vitro. The main lipid CHETA, cholest-5-en-3beta-yl[2-[[4-[(carboxymethyl)dithio]-1-iminobutyl]amino]ethyl] carbamate (C36H61N3O4S2), was synthesized and used to prepare pro-cationic liposomes. The thymidine kinase (TK) gene loaded pro-cationic liposomes were prepared by first mixing the plasmid DNA and protamine together, and then incubating the resulted polyplexes with blank pro-cationic liposomes preformed by the thin film dispersion-sonication method.

[Preparation and gene expression of transferrin modified gene loaded procationic liposomes].

A novel transferrin modified non-viral gene delivery system Tf-PLPD was developed and the related characteristics was investigated. Blank procationic liposomes were prepared by film dispersion-filteration method. PLPD was prepared as follows by first mixing the plasmid DNA and protamine together, then the resulted polyplexes were incubated for 10 min at room temperature, followed by addition of preformed blank procationic liposomes.

Preparation and characterization of a novel nonviral gene transfer system: procationic-liposome-protamine-DNA complexes.

Procationic-liposome-protamine-DNA (PLPD) vector, a novel nonviral gene delivery system, that may further adsorb transferrin (Tf) at its surface via electrostatic interactions to form Tf-PLPD, was prepared from soybean phosphatidylcholine (PC), cholesterol (Chol), and a kind of cholesterol derivative, CHETA(cholest-5-en-3-ol(3beta)-[2-[[4-[(carboxymethyl)dithio]-1-iminobutyl] amino] ethyl] carba- mate) containing disulfide bond by film dispersion-filteration method. Central composite design was used to optimize the formulation. The presence of serum did not affect the transfection activity of PLPD or Tf-PLPD and the cell viability was not affected significantly when the cells were incubated with the complexes for 4 hr at 37 degrees C.

Characterization of transferrin-modified procationic-liposome protamine-DNA complexes.

We developed a novel transferrin modified non-viral gene delivery system, transferrin-modified procationic-liposome-protamine-DNA complexes (Tf-PLPD) and investigated its characteristics. Blank procationic liposomes were prepared using the film dispersion filter method. Protamine was used to condense plasmid DNA to form protamine-DNA complexes and the complexes were further incubated with blank procationic liposomes to form PLPD.

Characteristics comparison before and after lyophilization of transferrin modified Procationic-Liposome-Protamine-DNA complexes (Tf-PLPD).

A novel non-viral gene delivery system, Procationic-Liposome-Protamine-DNA complexes (PLPD) which could further adsorb transferrin on the surface as a targeting ligand to form Tf-PLPD, was prepared and characterized before and after lyophilization. The size distribution of Tf-PLPD was in the range of 240 +/- 12 nm and the zeta potential was -24.10 +/- 2.

Research on thymopentin loaded oral N-trimethyl chitosan nanoparticles.

Peptides, although high efficacy and specificity in their physiological function, usually have low therapeutical activities due to their poor bioavailability when administrated orally. Nanoparticles have been regarded as a useful vector for targeted drug delivery system because they can protect drug from being degraded quickly and pass the gastrointestinal barriers. Here we described a novel oral N-trimethyl chitosan nanoparticles formulation containing thymopentin (Tp5-TMC-NP).

[Determination of trace bismuth in traditional Chinese medicines by hydride generation atomic fluorescence spectrometry].

A method is reported for the determination of trace bismuth in traditional chinese medicine by hydride generation atomic fluorescence spectrometry. The effect of different means of digestion, the medium amounts of acid and reducing agent on the determination of Bi is investigated. In the given conditions, the linear range of determination is 0.