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The paper describes the statistical analysis of the response of gastric cancer cells and normal cells to broadband terahertz radiation up to 4 THz, both with and without the use of nanostructured contrast agents. The THz spectroscopy analysis was comparatively performed under the ATR procedure and transmission measurement procedure. The statistical analysis was conducted towards multiple pairwise comparisons, including a support medium (without cells) versus a support medium with nanoparticles, normal cells versus normal cells with nanoparticles, and, respectively, tumor cells versus tumor cells with nanoparticles. When generally comparing the ATR procedure and transmission measurement procedure for a broader frequency domain, the differentiation between normal and tumor cells in the presence of contrast agents is superior when using the ATR procedure. THz contrast enhancement by using contrast agents derived from MRI-related contrast agents leads to only limited benefits and only for narrow THz frequency ranges, a disadvantage for THz medical imaging.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11240478 | PMC |
http://dx.doi.org/10.3390/cancers16132454 | DOI Listing |
J Med Chem
September 2025
Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
Nitric oxide (NO) is a multifunctional signaling molecule in oncology, influencing tumor progression, apoptosis, and immune responses. In contrast, chlorambucil (Cbl), a DNA-alkylating chemotherapeutic, induces cytotoxicity through DNA damage. Here, we report a photoresponsive nanoparticle platform for sequential codelivery of NO and Cbl, where NO is released within 10 min of irradiation, followed by Cbl release within 30 min.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P.R. China.
Developing artificial hosts with temperature-driven conformational switching behaviors facilitates our understanding of the temperature-dependent allostery and adaptation mechanisms in natural recognition systems. Herein, we report the design and synthesis of three pairs of water-soluble, enantiomeric binaphthalene-based tetraimidazolium macrocycles (SS/RR-1•4Cl- - SS/RR-3•4Cl-) as artificial hosts for exploring sequence-selective recognition of dinucleotides in aqueous media. Owing to the reversible rotational conformation of axially chiral binaphthyl units, SS-1•4Cl- demonstrates the conformational switching, converting from cis-conformation (SS-1) to trans-conformation (SS-1) by increasing temperature, thereby causing the recognition cavity to transition from a closed to an open state.
View Article and Find Full Text PDFInt J Cosmet Sci
September 2025
Department of Materials, School of Natural Sciences, The University of Manchester, Manchester, UK.
Objectives: Machine-based cyclic combing of hair tresses under dry conditions is a proven method for evaluating hair strength and the impact of treatments. Recent advancements in image analysis allow for a detailed review of hair fragment lengths and quantities produced after specific combing cycles. Our aim is to provide an in-depth analysis of the kinetics of hair fragment formation.
View Article and Find Full Text PDFMikrochim Acta
September 2025
Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Salmonella Typhimurium (S. Typhimurium) is one of the most common food-borne diseases, highlighted as the top food-borne bacterial pathogen in the world with a low infectious dose (1 CFU) and high mortality rate. It is commonly associated with numerous foods such as dairy products, protein sources (multiple types of meat, poultry, and eggs), and bakery products.
View Article and Find Full Text PDFPhytochemistry
September 2025
Plant Protection Institute, HUN-REN Centre for Agricultural Research, Fehérvári út 132-144, 1116 Budapest, Hungary. Electronic address:
The demand for previously undescribed antimicrobial agents is increasing due to the emergence of resistant plant pathogens. One of the untapped sources of new biopesticides is the plant kingdom. A bioassay-guided process comprising TLC-Bacillus subtilis bioassay, TLC-MS, and preparative flash column chromatography enabled the isolation of five previously undescribed antimicrobial labdane diterpenes (graminifolins A-E, 1-5) from the flower extract of grass-leaved goldenrod (Euthamia graminifolia, formerly Solidago graminifolia).
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