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Development of a Novel Synchronous Spectrofluorimetric Method Coupled With Chemometric Modelling for Ultrasensitive Analysis of Tenofovir and Dolutegravir With Implication for Pharmacokinetic Studies.
Luminescence
January 2025
Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.
This study introduces a novel synchronous spectrofluorimetry coupled with chemometric tools for the determination of tenofovir and dolutegravir antiretroviral drugs. Utilizing partial least squares regression (PLS) fine-tuned by genetic algorithm as variable selection tool, the developed models demonstrate greater sensitivity, cost-effectiveness, and reduced environmental impact compared to traditional HPLC methods. The model's validation was further confirmed using external validation in addition to QC samples as per ICH M10 guidelines, which yielded high accuracy ranged between 94.
View Article and Find Full Text PDFUltrathin polymer membrane for improved hole extraction and ion blocking in perovskite solar cells.
Nat Commun
December 2024
Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian, China.
Highly efficient perovskite solar cells (PSCs) in the n-i-p structure have demonstrated limited operational lifetimes, primarily due to the layer-to-layer ion diffusion in the perovskite/doped hole-transport layer (HTL) heterojunction, leading to conductivity drop in HTL and component loss in perovskite. Herein, we introduce an ultrathin (~7 nm) p-type polymeric interlayer (D18) with excellent ion-blocking ability between perovskite and HTL to address these issues. The ultrathin D18 interlayer effectively inhibits the layer-to-layer diffusion of lithium, methylammonium, formamidium, and iodide ions.
View Article and Find Full Text PDFAccuracy of laser fluorescence in assessment of various caries removal techniques: an in vitro validation.
BMC Oral Health
December 2024
Department of Pediatric Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Türkiye.
Background: This study aimed to evaluate the accuracy of laser fluorescence (LF) readings in detection of caries removal by various techniques (CRTs).
Methods: A hundred and eighty extracted human molar teeth included in the study which were scored 3, 4, and 5 according to ICDAS. Each score group was randomly assigned to 4 subgroups according to CRT including ceramic bur (Group A), carbide bur (Group B), carbide bur with alumina abrasion (Group C), and carbide bur with bioactive glass (BAG) abrasion (Group D) (n = 15 for each group).
Preparation of REE-doped CaF single crystals for accurate determination of REE concentrations in CaF crystals via UV-LA-ICP-MS.
Talanta
December 2024
Key Laboratory of Testing and Tracing of Rare Earth Products, State Administration for Market Regulation, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, PR China; Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, PR China. Electronic address:
Accurate determination of rare earth element (REE) concentrations in CaF crystals using UV-LA-ICP-MS is important but challenging due to the lack of matrix-matched reference materials. In this study, a REE-doped CaF single crystal (CaF-05), prepared via the Bridgman-Stockbarger technique, was systematically characterized to assess its optical properties, homogeneity, and stability. Analyses using portable laser irradiation, UV-vis spectroscopy, back scatter electron (BSE) imaging, and cathodoluminescence (CL) demonstrated that the crystal possesses high optical quality and exhibits distinct optical adsorption properties compared to the silicate reference material NIST SRM 610.
View Article and Find Full Text PDFl-Cysteine-Modified Carbon Dots Derived from for Thiram Pesticides Identification on Edible Perilla Leaves.
ACS Omega
December 2024
Department of Biosystems Machinery Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea.
In this work, environmentally friendly fluorescent carbon dots (C-dots) were developed for the purpose of thiram identification in the leaves of perilla plants. Powdered plant petals from were hydrothermally combined to create C-dots. Analytical techniques, such as scanning electron microscopy, energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy, Raman spectroscopy, ultraviolet spectroscopy, Fourier transmission infrared spectroscopy, and photoluminescence were employed to examine the properties of C-dots.
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