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Zonal Characteristics of Collagen Ultrastructure and Responses to Mechanical Loading in Articular Cartilage.
Acta Biomater
January 2025
Biomedical Engineering, College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK. Electronic address:
The biomechanical properties of articular cartilage arise from a complex bioenvironment comprising hierarchically organised collagen networks within the extracellular matrix (ECM) that interact with the proteoglycan-rich interstitial fluid. This network features a depth-dependent fibril organisation across different zones. Understanding how collagen fibrils respond to external loading is key to elucidating the mechanisms behind lesion and managing degenerative conditions like osteoarthritis.
View Article and Find Full Text PDFUltrastructure of Olkasia polycarbonata (Euglenozoa, Euglenida) demonstrates cytoskeletal innovations associated with the feeding and flagellar apparatuses.
J Eukaryot Microbiol
January 2025
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.
Euglenids are flagellates with diverse modes of nutrition, including the photosynthetic Euglenophyceae, which acquired plastids via secondary endosymbiosis with green algae, and a diverse assemblage of predators of bacteria and other microeukaryotes. Most heterotrophic euglenids have never been cultivated, so their morphology remains poorly characterized and limited to only a few studies. "Ploeotids" are a paraphyletic group representing much of the diversity of heterotrophic euglenids and are characterized by their feeding apparatus and a rigid pellicle of 10-12 longitudinally arranged strips.
View Article and Find Full Text PDFMorphometric parameters of seeds as a practical method for identifying rare species of the genus L. (Liliaceae) from East Kazakhstan region.
PhytoKeys
January 2025
Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdańsk, Poland University of Gdansk Gdańsk Poland.
The genus includes some of the most important ornamental plants. The aim of this work was to study the seed morphology of species from East Kazakhstan, including seed coat structure. An analysis focused on five taxa from various natural environmental conditions.
View Article and Find Full Text PDF3D scaffold of hydroxyapatite/β tricalcium phosphate from mussel shells: Synthesis, characterization and cytotoxicity.
Heliyon
January 2025
Department of Cell Biology, Federal University of Paraná, Post box-19031, Zip code -81531-970, Curitiba, PR, Brazil.
Unlabelled: Bone tissue substitutes are increasing in importance. Hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP) act as a cell matrix and improve its mechanical properties. One of their raw materials is marine-origin by-products.
View Article and Find Full Text PDFIntegrative study of subcellular distribution, chemical forms, and physiological responses for understanding cadmium tolerance in two garden shrubs.
J Plant Physiol
January 2025
Beijing Forestry University, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Beijing, 100083, China. Electronic address:
Urban ornamental shrubs have significant potential for restoring cadmium (Cd)-contaminated soil. The Cd enrichment characteristics and tolerance mechanisms of Buxus sinica and Ligustrum × vicaryi were investigated through a simulated pot pollution experiment. Specifically, the Cd content and accumulation in different plant tissues, the subcellular distribution and chemical forms of Cd in the roots, and the effects of Cd on the ultrastructure of root cells under various Cd concentrations (0, 25, 50, 100, and 200 mg kg⁻) were analyzed.
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