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Synthesis and Optical Properties of -Arylnaphtho- and Anthra[2,3-]oxazol-2-amines.
Molecules
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School of Pharmaceutical Sciences, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan.
Oxazole, a versatile and significant heteroarene, serves as a bridge between synthetic organic chemistry and applications in the medicinal, pharmaceutical, and industrial fields. Polycyclic aromatic compounds with amino groups substituted at the 2-position of an oxazole, such as 2-aminonaphthoxazoles, are expected to be functional probes, but their synthetic methods are extremely limited. Herein, we describe electrochemical reactions of 3-amino-2-naphthol or 3-amino-2-anthracenol and isothiocyanates in DMSO, using a graphite electrode as an anode and a platinum electrode as a cathode in the presence of potassium iodide (KI), which afford -arylnaphtho- and -arylanthra[2,3-]oxazol-2-amines via cyclodesulfurization.
View Article and Find Full Text PDFSpectroscopic and Morphological Examination of CoRMoO (R = Ho, Yb, Gd) Obtained by Glycine Nitrate Procedure.
Materials (Basel)
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IME Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestrasse 3, 520056 Aachen, Germany.
The glycine nitrate procedure (GNP) is a method that proved to be the easiest and most effective method for controlling the composition and morphology during the synthesis of CoRMoO (R = Ho, Yb, Gd). This method of the combustion process achieves control of stoichiometry, homogeneity, and purity. Metal nitrates and glycine were mixed in the appropriate stoichiometric ratios to produce CoRMoO (R = Ho, Yb, Gd).
View Article and Find Full Text PDFIdentification of high-risk oral leukoplakia (OLK) using combined Raman spectroscopic analysis of brush biopsy and saliva samples: A proof of concept study.
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Centre for Radiation and Environmental Science, FOCAS Research Institute, Technological University Dublin, City Campus, Dublin, Ireland; School of Physics, Clinical and Optometric Sciences, Technological University Dublin, City Campus, Dublin, Ireland.
The gold standard method of diagnosis of oral leukoplakia (OLK) is a tissue biopsy followed by histological examination. Raman spectroscopic studies of cytological brush biopsy and saliva samples have previously been shown to differentiate low (no and mild dysplasia) and high risk (moderate and severe dysplasia) OLKs, discriminant models of cellular samples achieving higher specificity, whereas those based on saliva samples achieved higher sensitivity. The current study combines the spectral data sets of cell and saliva samples in an attempt to improve the overall efficiency of the discriminating models.
View Article and Find Full Text PDFInvestigation of dielectric and spectroscopic properties of pure, commercial, and sugar solution added honey with microwave X band and spectroscopy techniques.
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Department of Physics, the Institute of Science, Dr. Homi Bhabha State University, Mumbai, India.
The adulteration of honey is a globally growing issue due to its medicinal benefits and health-promoting properties. This problem primarily involves the addition of sugars and other substances. To address these concerns, a comparative study was conducted to investigate the dielectric and spectroscopic properties of pure, sugar solution added honey, and commercially available honey.
View Article and Find Full Text PDFUntangling the Efficient Boron-Initialized Hydroxyl-Terminated Polybutadiene Combustion for High Energetic Solid Propulsion Systems.
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Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States.
Highly energetic boron (B) particles embedded in hydroxyl-terminated polybutadiene (HTPB) thermosetting polymers represent stable solid-state fuel. Laser-heating of levitated B/HTPB and pure HTPB particles in a controlled atmosphere revealed spontaneous ignition of B/HTPB in air, allowing for examination of the exclusive roles of boron. These ignition events are probed via simultaneous spectroscopic diagnostics: Raman and infrared spectroscopy, temporally resolved high-speed optical and infrared cameras, and ultraviolet-visible (UV-vis) spectroscopy.
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