Thermal Treatments on a UDMA-TEGDMA Nanocomposite Doped With Gold Nanorods Investigated by In-situ Raman-Spectroscopy

Article Chemistry, Analytical

Mid-Infrared Photothermal-Fluorescence In Situ Hybridization for Functional Analysis and Genetic Identification of Single Cells

Yeran Bai et al.

Summary: A mid-infrared photothermal-fluorescence in situ hybridization (MIP-FISH) platform is developed for simultaneous identification and metabolic analysis of microbes with single-cell resolution and high throughput. By improving MIP imaging, isotopically labeled compounds incorporated into proteins of individual bacterial cells can be sensitively detected, while FISH labeling with rRNA-targeted probes enables the identification of the analyzed cells. In proof-of-concept experiments, MIP-FISH successfully discriminates and identifies labeled bacterial cells within a complex human gut microbiome sample based on the clear spectral red shift in the protein amide I region caused by incorporation of 13C atoms from 13C-labeled glucose. This study opens up new opportunities for single-cell structure-function analyses in microbiology.

ANALYTICAL CHEMISTRY (2023)

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Article Biochemical Research Methods

Infrared spectrometric biomarkers for ulcerative colitis screening using human serum samples

Hemendra Ghimire et al.

Summary: This study utilized infrared spectrometry and data analysis techniques to investigate colitis-induced alterations in molecular components of serum samples. Through the analysis of samples from ulcerative colitis patients and healthy volunteers, five identifying spectral signatures were found, and one of them showed high sensitivity and specificity, suggesting it could be a reliable diagnostic test for human patients.

JOURNAL OF BIOPHOTONICS (2022)

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Article Biochemistry & Molecular Biology

The Effect of Femtosecond Laser Irradiation and Plasmon Field on the Degree of Conversion of a UDMA-TEGDMA Copolymer Nanocomposite Doped with Gold Nanorods

Attila Bonyar et al.

Summary: This work investigates the effects of femtosecond laser irradiation and doping with plasmonic gold nanorods on the conversion degree of a urethane dimethacrylate-triethylene glycol dimethacrylate nanocomposite. It is found that the presence of gold nanorods alone can increase the conversion degree of the photopolymer. The combination of femtosecond laser impulses and nanorod doping shows the best results.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2022)

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Article Polymer Science

Optimization of Plasmonic Gold Nanoparticle Concentration in Green LED Light Active Dental Photopolymer

Katalin Bukovinszky et al.

Summary: The study investigated the surface plasmon resonance effect of gold nanoparticles on a photopolymer system and found that under specific conditions, it can significantly improve polymerization efficiency.

POLYMERS (2021)

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Article Spectroscopy

Raman spectroscopic study of gamma radiation-initiated polymerization of diethylene glycol dimethacrylate in different solvents

Malik H. Mahmood et al.

Summary: This study investigated the degree of conversion and polymerization kinetics of DEGDMA monomer upon gamma irradiation in different solvents through experimental and theoretical calculations. The results showed that the polymerization rate is influenced by the solvent type, and Raman measurements revealed the presence of partially crosslinked monomer molecules in the polymer matrix.

JOURNAL OF RAMAN SPECTROSCOPY (2021)

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Article Chemistry, Physical

An Evaluation of the Properties of Urethane Dimethacrylate-Based Dental Resins

Agata Szczesio-Wlodarczyk et al.

Summary: This study evaluated the effects of different monomer combinations in dental resin materials and found that using three different monomers, such as Bis-GMA, Bis-EMA, and UDMA, can create a strong polymer matrix. The hardness, flexural strength, and diametral tensile strength of the materials varied with different combination ratios.

MATERIALS (2021)

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Article Chemistry, Physical