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Pigment granule architecture varies across yellow, red, and brown chromatophores in squid Doryteuthis pealeii.
Sci Rep
December 2024
Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, 02115, USA.
Cephalopods produce dynamic colors and skin patterns for communication and camouflage via stratified networks of neuronally actuated yellow, red, and brown chromatophore organs, each filled with thousands of pigment granules. While compositional analysis of chromatophore granules in Doryteuthis pealeii reveals the pigments as ommochromes, the ultrastructural features of the granules and their effects on bulk coloration have not been explored. To investigate this, we isolated granules from specific colored chromatophores and imaged them using multiple modalities.
View Article and Find Full Text PDFAbiotic Factors Modulating Metabolite Composition in Brown Algae (Phaeophyceae): Ecological Impacts and Opportunities for Bioprospecting of Bioactive Compounds.
Mar Drugs
December 2024
Laboratory of Natural Products from Seaweeds (ALGAMAR), Department of Marine Biology, Institute of Biology, Federal Fluminense University, Niterói 24210-201, RJ, Brazil.
Brown algae are vital structural elements and contributors to biodiversity in marine ecosystems. These organisms adapt to various environmental challenges by producing primary and secondary metabolites crucial for their survival, defense, and resilience. Besides their ecological role, these diverse metabolites have potential for biotechnological applications in industries including pharmaceuticals, cosmetics, and food.
View Article and Find Full Text PDFDermoscopy of Scabies: Utility of Polarised and Ultraviolet-Induced Fluorescence Examination in Fair and Dark Skin.
Australas J Dermatol
December 2024
Department of Medical Area, Institute of Dermatology, University of Udine, Udine, Italy.
Introduction: Ultraviolet-based dermoscopy may support the recognition of scabies, yet neither accuracy analyses nor data on skin of colour are available. The aim of this multicentric observational retrospective was to investigate the diagnostic accuracy of polarised and ultraviolet-induced fluorescence (UVF) dermoscopic examination in both fair and dark skin, also assessing possible differences according to the skin tone.
Methods: Consecutive patients with a diagnosis of scabies were eligible.
First report of causing leaf spot on in China.
Plant Dis
December 2024
Inner Mongolia Minzu University, Tongliao, Inner Mongolia, China;
Fangfeng (Saposhnikovia divaricata) is a perennial plant belonging to the Umbelliferae family, and is widely cultivated as a traditional Chinese medicine plant used to treat various diseases in northern China. In August 2022, a widespread leaf spot disease emerged on the Fangfeng leaves across a 2.5-acre farmland located in the Naiman District of Tongliao City, China ( 44°17' N; 121°29' E), where 5,000 acres of Fangfeng had been cultivated.
View Article and Find Full Text PDFLight-Triggered Reversible Assembly of Halide Perovskite Nanoplatelets.
Adv Mater
December 2024
Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741246, India.
Advancements in stimuli-driven nanoactuators necessitate the discovery of photo-switchable, self-contained semiconductor nanostructures capable of precise mechanical responses. The reversible assembly of 0D CsBiI halide perovskite nanoplatelets (NPLs) between stacked and scattered configurations are demonstrated under light and dark, respectively. This sunlight-triggered perpetual flipping of the NPLs, occurring in less than a minute, is associated with a color change between brown and red.
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