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Blue color is found in a wide range of malignant and benign melanocytic and nonmelanocytic lesions and in lesions that result from penetration of exogenous materials, such as radiation or amalgam tattoo or traumatic penetration of particles. Discriminating between different diagnostic entities that display blue color relies on careful patient examination and lesion assessment. Dermoscopically, the extent, distribution, and patterns created by blue color can help diagnose lesions with specificity and differentiate between benign and malignant entities. This article provides an overview of the main diagnoses whereby blue color can be found, providing simple management rules for these lesions.
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http://dx.doi.org/10.1016/j.det.2013.07.001 | DOI Listing |
J Colloid Interface Sci
March 2025
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China. Electronic address:
The phenomena of thermochromic afterglow have attracted significant attention in advanced information encryption and anticounterfeiting applications. However, it is still a challenge to realize visible light-activated thermochromic afterglow in a single material. Herein, we demonstrate thermochromic afterglow under visible light excitation in a novel carbon dot (CD)-based composite, utilizing a temperature-dependent dual-mode afterglow mechanism.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
March 2025
Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, Corso Italia 57, 95129 Catania, Italy.
The modern synthesis of Egyptian Blue has been attempted - mostly with success- by many researchers, since the scientific community has been working on this experimentation for more than a century. The aim is that of reconstructing the chaîne opératoire used in the past to produce this pigment, among the first synthetic ones in the history, whose colour is due to the blue copper silicate cuprorivaite. Almost all the experiments carried out up to now in this sense have used malachite or commercial CuO as copper source in the receipt, contrarily to what stated by Vitruvius who described the procedure as using copper filings, probably obtained from scrap metal.
View Article and Find Full Text PDFInt J Biol Macromol
March 2025
Food Microbiology Key Laboratory of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, PR China.
The slight acidic pH changes during food storage and transportation are often difficult to detect in a timely and accurate manner. There is also an urgent need to establish a portable, accurate, and low interference detection method for real-time monitoring of the quality changes of fresh juice that already has its own color. In this paper, a self-ratiometric fluorescent sensor (DCCA/SA bead) was prepared by combining a modified coumarin and sodium alginate (SA), and was used for the extreme pH monitoring of fluorescent by naked eye colorimetry.
View Article and Find Full Text PDFACS Appl Mater Interfaces
March 2025
CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Blue-phase liquid crystals (BPLCs) have shown great potential in hyper-reflective display technology due to their narrow bandgap, high color saturation, and fast response characteristics. However, there remains a significant challenge for achieving open-patternable dual-chiral BPLC films (DH-BP) and precise tuning for efficient hyper-reflection due to the packaging limitations of liquid crystal cells and the complexities of the dynamic bandgap matching principle. In this study, an in situ secondary growth strategy was proposed to successfully fabricate structurally continuous and uniform DH-BP films.
View Article and Find Full Text PDFWe present a method to selectively suppress unwanted higher-order resonances in all-dielectric tri-layer structural color filters, achieving reflective red (R), green (G), and blue (B) colors through controlled optical interference. By applying a gradient-based optimization technique, we fine-tune the designs to improve color purity by eliminating undesired resonances outside the passband of the tri-layer structure. The filters are composed of a low-refractive-index (LRI) layer sandwiched between two high-refractive-index (HRI) layers.
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