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A new gastrotrich species of the genus Cephalodasys (Macrodasyida: Cephalodasyidae) is described from Capron Shoal, Florida, USA. The new species is up to 630 μm long. There are six TbA that arises directly from a fleshy hand-like base.
View Article and Find Full Text PDFUnderstanding the correlation between source and chiral, physichochemical properties of chitin nanocrystals; insights from beetle (Cetonia aurata) skeletal segments.
Int J Biol Macromol
January 2025
Biorefinery Processes Research Group, Department of Chemical and Environmental Engineering, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastian, Spain; Department of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul 34469, Türkiye. Electronic address:
Chitin properties are known to vary depending on animal taxa, organismal source, and specific skeletal segments; However, the influence of these source-dependent variations on the physicochemical characteristics of chitin nanocrystals, particularly their Bouligand architecture, remains largely unexplored. Herein, chitin nanocrystals were isolated from seven different skeletal segments of C. aurata and characterized.
View Article and Find Full Text PDFChiral plasmonic-dielectric coupling enables strong near-infrared chiroptical responses from helicoidal core-shell nanoparticles.
Nat Commun
October 2024
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.
Helicoid plasmonic nanoparticles with intrinsic chirality are an emerging class of artificial chiral materials with tailorable properties. The ability to extend their chiroplasmonic responses to the near-infrared (NIR) range is critically important for biomedical and nanophotonic applications, yet the rational design of such materials remains challenging. Herein, a strategy employing chiral plasmon-dielectric coupling is proposed to manipulate the chiroptical responses into the NIR region with high optical anisotropy.
View Article and Find Full Text PDFStructure and properties of the exopolysaccharide isolated from Flavobacterium sp. Root935.
Carbohydr Polym
November 2024
Department of Chemical Sciences and Task Force for Microbiome Studies, University of Naples Federico II, Via Cinthia 4, 80126 Naples, Italy. Electronic address:
Flavobacterium strains exert a substantial influence on roots and leaves of plants. However, there is still limited understanding of how the specific interactions between Flavobacterium and their plant hosts are and how these bacteria thrive in this competitive environment. A crucial step in understanding Flavobacterium - plant interactions is to unravel the structure of bacterial envelope components and the molecular features that facilitate initial contact with the host environment.
View Article and Find Full Text PDFAngle-resolved optical spectroscopy of photonic cellulose nanocrystal films reveals the influence of additives on the mechanism of kinetic arrest.
Soft Matter
May 2024
Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, UK.
Cellulose nanocrystals (CNCs) are rod-like nanoparticles whose chiral self-assembly into photonic films has been promoted as a sustainable source of colouration. Upon drying, an aqueous CNC suspension passes through two regimes: first, a liquid phase, where the CNCs self-organise into a cholesteric liquid crystal, followed by a kinetically-arrested phase, where the helicoidal structure compresses upon loss of solvent, resulting in a solid film with vibrant structural colour. The transition between these two regimes plays an important role in the visual appearance of photonic CNC films, but details on when and how kinetic arrest occurs have remained elusive.
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