Preparation and Properties of Rosin-based Anthraquinone Fluorescent Waterborne Polyurethane.

Fluorescent polyurethane has been widely used as fluorescent probes and switches due to its diverse structure and properties, but most of them are solvent-based and synthesized from petroleum-based products. A new type of rosin-based anthraquinone fluorescent waterborne polyurethane (WPU-DAAQ) with good and stable fluorescence properties was synthesized by reacting rosin modified ester (RAG) as a diol and 2, 6-diaminoanthraquinone (DAAQ) as a fluorescent agent with diisocyanate. The structure of WPU-DAAQ was characterized by Fourier transform infrared spectroscopy, UV-vis absorption spectroscopy, and hydrogen magnetic resonance spectroscopy.

Effectiveness of acupoint stimulation combined with neurogenic bowel training on constipation in stroke patients: a retrospective study.

Objective: To analyze the effectiveness of acupoint stimulation combined with neurogenic bowel training on constipation in stroke patients.

Methods: A retrospective analysis was conducted on the clinical data of 89 stroke patients with constipation admitted to our hospital from July 2022 to January 2024. All patients met the inclusion and exclusion criteria.

Preparation and pH Detection Performance of Rosin-Based Fluorescent Polyurethane Microspheres.

Rosin-based fluorescent polyurethane emulsion (FPU) was prepared using isophorone diisocyanate, ester of acrylic rosin and glycidyl methacrylate, 1,5-dihydroxy naphthalene (1,5-DN), and 1,4-butanediol as the raw materials. Then, rosin-based fluorescent polyurethane microspheres (FPUMs) were successfully prepared by suspension polymerization method using FPU as the main material, azodiisobutyronitrile as the initiator, and gelatin as the dispersant. FPUMs were characterized by Fourier transform infrared spectra, thermogravimetric analysis, optical microscopy, scanning electron microscopy and fluorescence spectra, and the response performance of FPUMs to pH was studied.

A neoteric dual-channel spectral sensor for wide-range pH detection based on variables in UV-vis peak and intensity.

A water-soluble 2',4',6'-trihydroxy phenylazo luminol dye (THPL) with a D-π-A conjugated structure was developed for the first time for the dual-channel spectral sensing of a wide-range of pH values in aqueous solutions, using phloroglucinol as the electron-donating group, heterocycle amide luminol as the electron-accepting one and -NN- as the π-conjugated bridge. Its UV-vis absorption spectrum, especially its spectral response to pH, was investigated in detail. The results confirmed that the proposed THPL exhibited superior UV-vis spectral properties, a strong molar absorption coefficient ( = 3.

Preparation and Properties of Hydrophilic Rosin-Based Aromatic Polyurethane Microspheres.

Hydrophilic aromatic polyurethane (HAPU) microspheres were prepared through dispersion polymerization of a rosin-based polyurethane dispersion with C=C and styrene (St). The effects of the monomer ratio (i.e.

Enhanced mechanical, thermal, and UV-shielding properties of poly(vinyl alcohol)/metal-organic framework nanocomposites.

Metal-organic framework (HKUST-1) nanoparticles were successfully synthesized, and poly(vinyl alcohol) (PVA)/HKUST-1 nanocomposite films were fabricated by a simple solution casting method. Our results showed that the addition of HKUST-1 caused a remarkable enhancement in both thermal stability and mechanical properties of the PVA nanocomposites, due to the homogeneous distribution of HKUST-1 and the strong interfacial interactions between PVA and HKUST-1. With incorporation of 2 wt% HKUST-1, the degradation temperature of the nanocomposites was about 33 °C higher than that of pure PVA.

[Relationship between the chronic periodontitis and the depression anxiety psychological factor].

Objective: To explore the relationship between the chronic periodontitis (CP) and the depression-anxiety psychological factors.

Methods: Thirty-one patients and 29 age, gender-matched volunteers were enrolled for this study. In order to assess the depression-anxiety psychological index, the subjects filled the questionnaire regarding the demographic and socioeconomic information, the oral hygiene habit, the Center for Epidemiologic Studies Depression Scale (CES-D) and the Self Rating Anxiety Scale(ASA).